Tunnelling and Underground Space Technology最新文献_第2页

Muck particle transport behavior and Cutterhead-Agitator synergistic optimization for EPB shield tunneling in sandy pebble strata 砂卵石地层EPB盾构隧道泥粒输运特性及刀-搅拌器协同优化

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2026-01-23 DOI: 10.1016/j.tust.2026.107473

Yuxiang Yao, Jian Cui, Zhigang Yao, Xiongyu Hu, Yong Fang, Chuan He

Sandy pebble strata, characterized by high pebble content, high uniaxial compressive strength (UCS) of pebbles, poorly-sorted grain size distribution, and low flowability, often induce muck accumulation, cutterhead clogging, and chamber caking during earth pressure balance (EPB) shield tunneling, thereby reducing construction efficiency and compromising safety. Existing studies, predominantly relying on macroscopic indicators, often fail to elucidate the mesoscopic particle transport behaviors and the synergistic mechanism of the cutterhead-agitator system. This study develops a full-scale, three-dimensional finite difference method-discrete element method (FDM–DEM) coupled model to simulate particle transport within the cutterhead and soil chamber, to systematically reveal the transport mechanisms and guide equipment optimization. Results indicate that: (1) the soil chamber exhibits a “core–ring” dual-flow structure, characterized by a low-velocity “dead-zone column” at the center and a high-velocity annular channel at the periphery, attributed to the limited opening ratio in the central area and insufficient agitator coverage; (2) a “barrier–channel–dead-zone column” triple-control mechanism is proposed to explain the constraints imposed by energy barriers, geometric confinement, and cascade migration on particle transport; and (3) a synergistic optimization strategy is proposed, which includes increasing the opening ratio in the cutterhead’s central region, installing vertical agitators at the chamber center, and relocating the inner-ring agitator to R = 1.8 m. These findings provide significant theoretical insights for understanding muck transport behaviors and optimizing EPB shield design in sandy pebble strata.

砂质卵石地层具有含砾量大、卵石单轴抗压强度高、粒度分布分选差、流动性低等特点，在土压平衡盾构施工过程中，易出现堆渣、刀盘堵塞、硐室结块等现象，降低施工效率，危害安全。现有的研究主要依靠宏观指标，往往不能阐明刀盘-搅拌系统的介观颗粒输运行为和协同机制。本研究建立了全尺寸三维有限差分法-离散元法（FDM-DEM）耦合模型，模拟刀盘和土腔内颗粒输运，系统揭示输运机理，指导设备优化。结果表明：(1)由于中部开孔比有限和搅拌器覆盖面积不足，土室呈现出中心为低速“死区柱”、外围为高速环形通道的“核心-环”双流结构；(2)提出了“障碍-通道-死区柱”三重控制机制，解释了能量障碍、几何约束和级联迁移对粒子输运的约束；(3)提出了在刀盘中心区域加大开度比、在腔室中心安装立式搅拌器、将内环搅拌器移至R = 1.8 m的协同优化策略。这些发现为理解砂卵石地层中泥质运移行为和优化EPB盾构设计提供了重要的理论见解。

{"title":"Muck particle transport behavior and Cutterhead-Agitator synergistic optimization for EPB shield tunneling in sandy pebble strata","authors":"Yuxiang Yao, Jian Cui, Zhigang Yao, Xiongyu Hu, Yong Fang, Chuan He","doi":"10.1016/j.tust.2026.107473","DOIUrl":"10.1016/j.tust.2026.107473","url":null,"abstract":"<div><div>Sandy pebble strata, characterized by high pebble content, high uniaxial compressive strength (UCS) of pebbles, poorly-sorted grain size distribution, and low flowability, often induce muck accumulation, cutterhead clogging, and chamber caking during earth pressure balance (EPB) shield tunneling, thereby reducing construction efficiency and compromising safety. Existing studies, predominantly relying on macroscopic indicators, often fail to elucidate the mesoscopic particle transport behaviors and the synergistic mechanism of the cutterhead-agitator system. This study develops a full-scale, three-dimensional finite difference method-discrete element method (FDM–DEM) coupled model to simulate particle transport within the cutterhead and soil chamber, to systematically reveal the transport mechanisms and guide equipment optimization. Results indicate that: (1) the soil chamber exhibits a “core–ring” dual-flow structure, characterized by a low-velocity “dead-zone column” at the center and a high-velocity annular channel at the periphery, attributed to the limited opening ratio in the central area and insufficient agitator coverage; (2) a “barrier–channel–dead-zone column” triple-control mechanism is proposed to explain the constraints imposed by energy barriers, geometric confinement, and cascade migration on particle transport; and (3) a synergistic optimization strategy is proposed, which includes increasing the opening ratio in the cutterhead’s central region, installing vertical agitators at the chamber center, and relocating the inner-ring agitator to R = 1.8 m. These findings provide significant theoretical insights for understanding muck transport behaviors and optimizing EPB shield design in sandy pebble strata.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107473"},"PeriodicalIF":7.4,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146033321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multiple-branching hierarchical fusion network for tunnel blasting excavation shape prediction using measurement while drilling data 基于随钻测量数据的多分支分层融合网络隧道爆破开挖形状预测

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2026-01-22 DOI: 10.1016/j.tust.2026.107479

Jun Wang , Qian Fang , Jinkun Huang , Guoli Zheng

Tunnel excavation shape characteristics using the drill-and-blast method are influenced by blasting parameters and geological conditions. Meanwhile, these excavation shape characteristics significantly impact tunnel stability, support construction quality, and construction costs. Traditional approaches for predicting excavation shape characteristics exhibit limitations in terms of accuracy and efficiency. To address this, we propose a multiple-branching hierarchical fusion extraction network (MBHF) for predicting tunnel excavation shape characteristics, including overbreak/underbreak values, cross-sectional curvature, and regional convexity/concavity. The MBHF model employs a multi-branch module for multi-attribute feature extraction and a gated structure for multi-source data fusion. It integrates construction parameters, blasting parameters, and measurement-while-drilling (MWD) data as inputs. The proposed MBHF model’s performance and superiority in feature extraction and fusion have been validated through ablation studies and comparative analyses. On the testing dataset, the model achieved high predictive accuracy, with R2 values of 0.97, 0.89, and 0.88 across the three prediction tasks. The multi-task learning strategy demonstrates superior performance compared to the single-task learning strategy in predicting excavation shape characteristics. The weight-constrained graph convolutional networks exhibit exceptional performance than the traditional graph convolutional networks in extracting features from MWD data. Increasing MWD data points (blasthole number and length) significantly enhances model performance, but performance declines beyond a certain threshold.

钻爆法隧道开挖形状特征受爆破参数和地质条件的影响。同时，这些开挖形态特征对隧道稳定性、支护施工质量和施工成本影响较大。传统的预测开挖形状特征的方法在准确性和效率方面存在局限性。为了解决这个问题，我们提出了一个多分支分层融合提取网络（MBHF）来预测隧道开挖形状特征，包括超/下破值、横截面曲率和区域凹凸度。该模型采用多分支模块进行多属性特征提取，采用门控结构进行多源数据融合。它集成了施工参数、爆破参数和随钻测量（MWD）数据作为输入。通过烧蚀实验和对比分析，验证了该模型在特征提取和融合方面的性能和优越性。在测试数据集上，该模型取得了较高的预测精度，三个预测任务的R2值分别为0.97、0.89和0.88。与单任务学习策略相比，多任务学习策略在预测挖掘形状特征方面表现优异。权重约束的图卷积网络在从随钻测井数据中提取特征方面表现出比传统图卷积网络更优异的性能。增加MWD数据点（炮眼数量和长度）可以显著提高模型性能，但超过一定阈值后，性能就会下降。

{"title":"Multiple-branching hierarchical fusion network for tunnel blasting excavation shape prediction using measurement while drilling data","authors":"Jun Wang , Qian Fang , Jinkun Huang , Guoli Zheng","doi":"10.1016/j.tust.2026.107479","DOIUrl":"10.1016/j.tust.2026.107479","url":null,"abstract":"<div><div>Tunnel excavation shape characteristics using the drill-and-blast method are influenced by blasting parameters and geological conditions. Meanwhile, these excavation shape characteristics significantly impact tunnel stability, support construction quality, and construction costs. Traditional approaches for predicting excavation shape characteristics exhibit limitations in terms of accuracy and efficiency. To address this, we propose a multiple-branching hierarchical fusion extraction network (MBHF) for predicting tunnel excavation shape characteristics, including overbreak/underbreak values, cross-sectional curvature, and regional convexity/concavity. The MBHF model employs a multi-branch module for multi-attribute feature extraction and a gated structure for multi-source data fusion. It integrates construction parameters, blasting parameters, and measurement-while-drilling (MWD) data as inputs. The proposed MBHF model’s performance and superiority in feature extraction and fusion have been validated through ablation studies and comparative analyses. On the testing dataset, the model achieved high predictive accuracy, with R2 values of 0.97, 0.89, and 0.88 across the three prediction tasks. The multi-task learning strategy demonstrates superior performance compared to the single-task learning strategy in predicting excavation shape characteristics. The weight-constrained graph convolutional networks exhibit exceptional performance than the traditional graph convolutional networks in extracting features from MWD data. Increasing MWD data points (blasthole number and length) significantly enhances model performance, but performance declines beyond a certain threshold.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107479"},"PeriodicalIF":7.4,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146033336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermomechanical behavior and damage mechanism of the lining backfill body of high-temperature thermal energy storage reservoirs in mines 矿山高温储热库衬砌充填体热力学行为及损伤机理

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2026-01-22 DOI: 10.1016/j.tust.2025.107409

Gang Xu , Pengfei Shan , Xingping Lai , Qinxin Hu , Shangtong Yang , Huicong Xu

The construction of underground thermal energy storage (UTES) systems using the space of abandoned mines is one of the most promising large-scale energy storage methods for the future. However, thermal fatigue damage caused by high-temperature environments may trigger potential destabilization of the backfill body that surround the thermal energy storage reservoir. It is therefore worthwhile to investigate the mechanism of mechanical weakening of the backfill body due to temperature effects. In this study, backfill body samples were subjected to heat treatment at six temperature levels and static mechanical testing. The thermomechanical behavior of the backfill body at different heating temperatures was investigated. Through acoustic emission (AE) technology and scanning electron microscope (SEM), the damage evolution law and instability precursors of the backfill body under thermomechanical effects were analyzed, revealing the crack propagation behavior and damage weakening mechanism of the backfill body. The results show that when the heating temperature rose from 25 °C to 500 °C, the compressive strength and elastic modulus of the backfill body decreased by 78.61 % and 84.21 %, and the peak strain increased by 62.54 %. High temperatures significantly weaken the mechanical properties of backfill body samples, promote plastic softening in the samples, and increase their ductility and deformation capacity. This is microscopically attributed to the structural damage to the backfill body caused by the progressive decomposition of ettringite, calcium silicate hydrate, and calcium hydroxide in high-temperature environments. This effect is visible in the SEM images of the microstructure of the backfill body and is dominated by the temperature level. The evolution patterns of AE counts and b-values effectively characterize the damage process of the backfill body and provide valuable early warning information for its fracture instability. As the temperature increased, the proportion of shear cracks rose from 31.72 % to 74.18 %. High temperatures significantly accelerate the formation and propagation of shear cracks, ultimately leading to a tensile-shear hybrid failure in the backfill body dominated by shear cracking. The research results provide theoretical references for the reinforcement design and disaster warning of defect-sensitive areas in thermal energy storage reservoir in UTES projects.

利用废弃矿山空间建设地下储热系统是未来最有前途的大规模储能方法之一。然而，高温环境引起的热疲劳损伤可能引发储热库周围充填体的潜在失稳。因此，对温度作用下充填体力学弱化的机理进行研究是有价值的。在本研究中，回填体试样进行了六个温度水平的热处理和静态力学测试。研究了充填体在不同加热温度下的热力学行为。通过声发射（AE）技术和扫描电镜（SEM）技术，分析了热力学作用下充填体的损伤演化规律和失稳前兆，揭示了充填体的裂纹扩展行为和损伤弱化机制。结果表明：当加热温度从25℃升高到500℃时，充填体抗压强度和弹性模量分别下降78.61%和84.21%，峰值应变增加62.54%；高温显著削弱了充填体试样的力学性能，促进了充填体试样的塑性软化，提高了充填体试样的延性和变形能力。微观上是由于钙矾石、水合硅酸钙和氢氧化钙在高温环境下不断分解，对充填体造成结构破坏。这种影响在回填体微观结构的SEM图像中可见，并且受温度水平的支配。声发射计数和b值的演化规律有效表征了充填体的破坏过程，为充填体的断裂失稳提供了有价值的预警信息。随着温度的升高，剪切裂纹的比例从31.72%上升到74.18%。高温显著加速了剪切裂纹的形成和扩展，最终导致充填体以剪切裂纹为主的拉剪复合破坏。研究结果可为UTES工程蓄热库区缺陷敏感区的加固设计和灾害预警提供理论参考。

{"title":"Thermomechanical behavior and damage mechanism of the lining backfill body of high-temperature thermal energy storage reservoirs in mines","authors":"Gang Xu , Pengfei Shan , Xingping Lai , Qinxin Hu , Shangtong Yang , Huicong Xu","doi":"10.1016/j.tust.2025.107409","DOIUrl":"10.1016/j.tust.2025.107409","url":null,"abstract":"<div><div>The construction of underground thermal energy storage (UTES) systems using the space of abandoned mines is one of the most promising large-scale energy storage methods for the future. However, thermal fatigue damage caused by high-temperature environments may trigger potential destabilization of the backfill body that surround the thermal energy storage reservoir. It is therefore worthwhile to investigate the mechanism of mechanical weakening of the backfill body due to temperature effects. In this study, backfill body samples were subjected to heat treatment at six temperature levels and static mechanical testing. The thermomechanical behavior of the backfill body at different heating temperatures was investigated. Through acoustic emission (AE) technology and scanning electron microscope (SEM), the damage evolution law and instability precursors of the backfill body under thermomechanical effects were analyzed, revealing the crack propagation behavior and damage weakening mechanism of the backfill body. The results show that when the heating temperature rose from 25 °C to 500 °C, the compressive strength and elastic modulus of the backfill body decreased by 78.61 % and 84.21 %, and the peak strain increased by 62.54 %. High temperatures significantly weaken the mechanical properties of backfill body samples, promote plastic softening in the samples, and increase their ductility and deformation capacity. This is microscopically attributed to the structural damage to the backfill body caused by the progressive decomposition of ettringite, calcium silicate hydrate, and calcium hydroxide in high-temperature environments. This effect is visible in the SEM images of the microstructure of the backfill body and is dominated by the temperature level. The evolution patterns of AE counts and <em>b</em>-values effectively characterize the damage process of the backfill body and provide valuable early warning information for its fracture instability. As the temperature increased, the proportion of shear cracks rose from 31.72 % to 74.18 %. High temperatures significantly accelerate the formation and propagation of shear cracks, ultimately leading to a tensile-shear hybrid failure in the backfill body dominated by shear cracking. The research results provide theoretical references for the reinforcement design and disaster warning of defect-sensitive areas in thermal energy storage reservoir in UTES projects.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107409"},"PeriodicalIF":7.4,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146033345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

3D reality and deep zoom image framework for inspection of an undersea multi-chamber tunnel 海底多室隧道三维实景及深度变焦图像框架

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2026-01-22 DOI: 10.1016/j.tust.2026.107466

Jun Shen , Jiazhi Huang , Zhiheng Zhu , Xiaohua Bao , Junhong Li , Xiangsheng Chen , Hongzhi Cui

Accurate inspection of undersea tunnel linings is essential for ensuring the long-term structural integrity and safe operation of marine infrastructure. However, conventional methods struggle with multi-chamber configurations due to visual data isolation and limited spatial correlation across chambers. To address this challenge, we propose a novel 3D Reality and Deep Zoom Image (3DZI) inspection technique that integrates 3D reconstruction with panoramic image unfolding. This method establishes a formalized mapping between three-dimensional models and high-resolution surface imagery, enabling precise localization, cross-chamber defect tracking, and improved data fusion. The proposed approach is cost-effective, scalable, and adaptable to confined and complex environments. Demonstrated in a real-world large-diameter undersea tunnel project, the method achieved reconstruction accuracy within ± 10 mm using consumer-grade equipment, offering a practical and economical solution for intelligent tunnel monitoring. The paper also discusses limitations regarding environmental variability, automation potential, and scalability. The findings contribute to the advancement of engineering informatics by extending how spatial and visual knowledge can be formalized and operationalized in the built environment.

海底隧道衬砌的准确检测对于保证海底基础设施结构的长期完整和安全运行至关重要。然而，由于视觉数据隔离和室间有限的空间相关性，传统方法难以与多室配置相匹配。为了解决这一挑战，我们提出了一种新的3D现实和深度变焦图像（3DZI）检测技术，该技术将3D重建与全景图像展开相结合。该方法建立了三维模型和高分辨率表面图像之间的形式化映射，实现了精确定位、跨腔缺陷跟踪和改进的数据融合。所提出的方法具有成本效益、可扩展性和可适应于受限和复杂的环境。在实际的大直径海底隧道工程中，该方法使用消费级设备实现了±10 mm以内的重建精度，为智能隧道监测提供了实用和经济的解决方案。本文还讨论了环境可变性、自动化潜力和可扩展性方面的限制。这些发现通过扩展空间和视觉知识如何在建筑环境中形式化和可操作化，有助于工程信息学的进步。

{"title":"3D reality and deep zoom image framework for inspection of an undersea multi-chamber tunnel","authors":"Jun Shen , Jiazhi Huang , Zhiheng Zhu , Xiaohua Bao , Junhong Li , Xiangsheng Chen , Hongzhi Cui","doi":"10.1016/j.tust.2026.107466","DOIUrl":"10.1016/j.tust.2026.107466","url":null,"abstract":"<div><div>Accurate inspection of undersea tunnel linings is essential for ensuring the long-term structural integrity and safe operation of marine infrastructure. However, conventional methods struggle with multi-chamber configurations due to visual data isolation and limited spatial correlation across chambers. To address this challenge, we propose a novel 3D Reality and Deep Zoom Image (3DZI) inspection technique that integrates 3D reconstruction with panoramic image unfolding. This method establishes a formalized mapping between three-dimensional models and high-resolution surface imagery, enabling precise localization, cross-chamber defect tracking, and improved data fusion. The proposed approach is cost-effective, scalable, and adaptable to confined and complex environments. Demonstrated in a real-world large-diameter undersea tunnel project, the method achieved reconstruction accuracy within ± 10 mm using consumer-grade equipment, offering a practical and economical solution for intelligent tunnel monitoring. The paper also discusses limitations regarding environmental variability, automation potential, and scalability. The findings contribute to the advancement of engineering informatics by extending how spatial and visual knowledge can be formalized and operationalized in the built environment.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107466"},"PeriodicalIF":7.4,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146033333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis and layout parameter optimization study for high-level radioactive waste disposal units in granite host rock 花岗岩主岩高放废物处置单元分析及布置参数优化研究

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2026-01-22 DOI: 10.1016/j.tust.2026.107474

Biao Wang , Zaobao Liu , Liang Chen , Hongsu Ma , Bo Lu , Sun Jian , Xi Du

The long-term strength of rocks under high-temperature and high-pressure conditions is crucial for assessing the stability of high-level radioactive waste disposal facilities. This study investigates the thermomechanical behavior of Beishan granite, a candidate host rock for Chinese high-level radioactive waste repository, under coupled thermal–mechanical loading. A series of triaxial direct shear creep tests integrated with acoustic emission monitoring were conducted to analyze the damage evolution and failure mechanisms of the rock. Results reveal that as temperature increases from 30 °C to 150 °C, the proportion of tensile failure in the granite increases from 29.03 % to 51.36 %. A thermo-mechanically coupled viscoelastic damage constitutive model is developed to accurately capture the time-dependent mechanical response of granite under triaxial direct shear. After validation against experimental data, the model is implemented into a finite element framework via a user subroutine to predict the long-term stability of an high-level radioactive waste disposal unit. Furthermore, fuzzy set theory was applied to optimize the layout parameters of the disposal unit, leading to an enhanced safety and efficiency profile; the optimal layout is determined with a canister number (N_C) to canister spacing (S_C) to unit spacing (S_I) ratio of 1:3:10. These results provide valuable insights into the thermo-mechanical behavior of granite and offer a practical tool supporting the design and safety evaluation of deep geological repositories, thereby facilitating the sustainable development of nuclear energy.

高温高压条件下岩石的长期强度是评价高放废物处置设施稳定性的关键。研究了中国高放废物处置库候选寄主岩北山花岗岩在热-力学耦合载荷作用下的热-力学行为。结合声发射监测，进行了一系列三轴直剪蠕变试验，分析了岩石的损伤演化和破坏机制。结果表明：随着温度从30℃升高到150℃，花岗岩中拉伸破坏的比例从29.03%增加到51.36%；为了准确地反映花岗岩在三轴直剪作用下的力学响应，建立了热-机耦合粘弹性损伤本构模型。在对实验数据进行验证后，该模型通过用户子程序实现到有限元框架中，以预测高放射性废物处置装置的长期稳定性。应用模糊集理论对处置单元布置参数进行优化，提高了处置单元的安全性和效率；最佳布局确定为罐数（NC）与罐间距（SC）与单位间距（SI）之比为1:3:10。这些结果为了解花岗岩的热力学行为提供了有价值的见解，并为深部地质储存库的设计和安全评价提供了实用工具，从而促进了核能的可持续发展。

{"title":"Analysis and layout parameter optimization study for high-level radioactive waste disposal units in granite host rock","authors":"Biao Wang , Zaobao Liu , Liang Chen , Hongsu Ma , Bo Lu , Sun Jian , Xi Du","doi":"10.1016/j.tust.2026.107474","DOIUrl":"10.1016/j.tust.2026.107474","url":null,"abstract":"<div><div>The long-term strength of rocks under high-temperature and high-pressure conditions is crucial for assessing the stability of high-level radioactive waste disposal facilities. This study investigates the thermomechanical behavior of Beishan granite, a candidate host rock for Chinese high-level radioactive waste repository, under coupled thermal–mechanical loading. A series of triaxial direct shear creep tests integrated with acoustic emission monitoring were conducted to analyze the damage evolution and failure mechanisms of the rock. Results reveal that as temperature increases from 30 °C to 150 °C, the proportion of tensile failure in the granite increases from 29.03 % to 51.36 %. A thermo-mechanically coupled viscoelastic damage constitutive model is developed to accurately capture the time-dependent mechanical response of granite under triaxial direct shear. After validation against experimental data, the model is implemented into a finite element framework via a user subroutine to predict the long-term stability of an high-level radioactive waste disposal unit. Furthermore, fuzzy set theory was applied to optimize the layout parameters of the disposal unit, leading to an enhanced safety and efficiency profile; the optimal layout is determined with a canister number (<em>N<sub>C</sub></em>) to canister spacing (<em>S<sub>C</sub></em>) to unit spacing (<em>S<sub>I</sub></em>) ratio of 1:3:10. These results provide valuable insights into the thermo-mechanical behavior of granite and offer a practical tool supporting the design and safety evaluation of deep geological repositories, thereby facilitating the sustainable development of nuclear energy.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107474"},"PeriodicalIF":7.4,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146033342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the characteristics of recirculating smoke flow in dead-end tunnel fire based on full-scale experiments 基于全尺寸实验的死角隧道火灾循环烟气流动特性研究

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2026-01-22 DOI: 10.1016/j.tust.2025.107396

Shunyu Yue , Le Wu , Zejian Lu , Pingyu Zhang , Peng Hu , Junxian Xie , Maohua Zhong

With the acceleration of the construction of underground space engineering in China, the number of single-ended tunnels in the construction process has increased year by year. In order to study the smoke spread characteristics in a single-ended tunnel formed during the construction phase of a long distance tunnel, a full-scale field experiment was carried out in the construction section of Shengli Tunnel in Tianshan Mountain. By analyzing the overall temperature distribution, wind speed distribution, smoke layer height and other parameters, combined with field observation, the law of smoke diffusion and settlement in the single-ended tunnel was studied. The temperature prediction models of different diffusion directions are given. The results show that:(1) Under natural ventilation conditions, the diffusion velocity of flue gas towards the closed end is slower than that towards the connected end, and the temperature of flue gas in the connected end is faster than that at the closed end. (2) At the connected end of the ceiling, the maximum flue gas temperature distribution basically conforms to the classical exponential decay model. (3) While at the closed end, the flue gas temperature distribution can be regarded as the superposition of the two parts of the flue gas flow due to the phenomenon of recirculating flue gas flow.

随着中国地下空间工程建设的加快，施工过程中的单端隧道数量逐年增加。为研究长距离隧道施工阶段形成的单端隧道烟气扩散特性，在天山胜利隧道施工段进行了全尺寸现场试验。通过分析整体温度分布、风速分布、烟层高度等参数，结合现场观测，研究了单端隧道烟气扩散沉降规律。给出了不同扩散方向下的温度预测模型。结果表明：(1)在自然通风条件下，烟气向封闭端扩散速度慢于向连通端扩散速度，连通端烟气温度上升快于向封闭端扩散速度。(2)吊顶连接端最大烟气温度分布基本符合经典指数衰减模型。(3)而在封闭端，由于烟气流的再循环现象，烟气温度分布可视为两部分烟气流的叠加。

{"title":"Study on the characteristics of recirculating smoke flow in dead-end tunnel fire based on full-scale experiments","authors":"Shunyu Yue , Le Wu , Zejian Lu , Pingyu Zhang , Peng Hu , Junxian Xie , Maohua Zhong","doi":"10.1016/j.tust.2025.107396","DOIUrl":"10.1016/j.tust.2025.107396","url":null,"abstract":"<div><div>With the acceleration of the construction of underground space engineering in China, the number of single-ended tunnels in the construction process has increased year by year. In order to study the smoke spread characteristics in a single-ended tunnel formed during the construction phase of a long distance tunnel, a full-scale field experiment was carried out in the construction section of Shengli Tunnel in Tianshan Mountain. By analyzing the overall temperature distribution, wind speed distribution, smoke layer height and other parameters, combined with field observation, the law of smoke diffusion and settlement in the single-ended tunnel was studied. The temperature prediction models of different diffusion directions are given. The results show that:(1) Under natural ventilation conditions, the diffusion velocity of flue gas towards the closed end is slower than that towards the connected end, and the temperature of flue gas in the connected end is faster than that at the closed end. (2) At the connected end of the ceiling, the maximum flue gas temperature distribution basically conforms to the classical exponential decay model. (3) While at the closed end, the flue gas temperature distribution can be regarded as the superposition of the two parts of the flue gas flow due to the phenomenon of recirculating flue gas flow.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107396"},"PeriodicalIF":7.4,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146033343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance assessment of anchor cable with high-strength C-shaped tube under double shearing 高强度c形管锚索在双重剪切作用下的性能评价

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2026-01-22 DOI: 10.1016/j.tust.2026.107475

Ye Chen, Renliang Shan, Yichao Peng, Lichong Li, Zonghui He

In order to improve the problem of repeated breakage of anchor cables due to shear in roadway support. This article takes the anchor cable with C-shaped tube (ACC), which has a shear-resistant structural design, as the research object. By selecting high-strength steel as the material for the C-shaped tube, the performance of ACC in rock support is improved. Based on double shear tests and tensile tests, it can be found that ACC demonstrated excellent shear control capabilities and efficiency that surpassed mere superposition by coordinating C-shaped tubes and cables. Through theoretical calculations, it has been found that increasing the strength of steel tubes can expand the failure envelope, as well as enhance the closure effect of C-shaped tubes. Following a thorough evaluation, ACC-30CrMo with better performance was selected, which has a strength improvement of 30.5% compared to ACC-Q345. Combined with numerical simulations using ABAQUS, it has been determined that the elongation rate of the C-shaped tube is a key parameter to prevent the steel tube from breaking before the cable and ensure ACCs’ performance. This article’s selection strategy can lay the foundation for the parameter research of high-strength ACC.

为了改善巷道支护中因剪切导致锚索反复断裂的问题。本文以具有抗剪结构设计的c形管锚索（ACC）为研究对象。通过选用高强钢作为c形管材料，提高了ACC在岩石支护中的性能。通过双剪试验和拉伸试验，可以发现ACC具有优异的抗剪能力和抗剪效率，其抗剪能力和抗剪效率超过了单纯的c型管索配合叠加。通过理论计算发现，提高钢管的强度可以扩大破坏包络线，增强c形管的封闭效果。经过全面的评估，我们选择了性能更好的ACC-30CrMo，其强度比ACC-Q345提高了30.5%。结合ABAQUS的数值模拟，确定了c形管的伸长率是防止钢管先于电缆断裂、保证ACCs性能的关键参数。本文的选择策略可为高强度ACC的参数研究奠定基础。

{"title":"Performance assessment of anchor cable with high-strength C-shaped tube under double shearing","authors":"Ye Chen, Renliang Shan, Yichao Peng, Lichong Li, Zonghui He","doi":"10.1016/j.tust.2026.107475","DOIUrl":"10.1016/j.tust.2026.107475","url":null,"abstract":"<div><div>In order to improve the problem of repeated breakage of anchor cables due to shear in roadway support. This article takes the anchor cable with C-shaped tube (ACC), which has a shear-resistant structural design, as the research object. By selecting high-strength steel as the material for the C-shaped tube, the performance of ACC in rock support is improved. Based on double shear tests and tensile tests, it can be found that ACC demonstrated excellent shear control capabilities and efficiency that surpassed mere superposition by coordinating C-shaped tubes and cables. Through theoretical calculations, it has been found that increasing the strength of steel tubes can expand the failure envelope, as well as enhance the closure effect of C-shaped tubes. Following a thorough evaluation, ACC-30CrMo with better performance was selected, which has a strength improvement of 30.5% compared to ACC-Q345. Combined with numerical simulations using ABAQUS, it has been determined that the elongation rate of the C-shaped tube is a key parameter to prevent the steel tube from breaking before the cable and ensure ACCs’ performance. This article’s selection strategy can lay the foundation for the parameter research of high-strength ACC.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107475"},"PeriodicalIF":7.4,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146033346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An integrated in-situ evaluation grouting method based on multi-parameter fusion of probe drilling, water pressure tests, and horizontal cross-hole resistivity tomography 基于探针钻孔、水压试验和水平井间电阻率层析成像多参数融合的原位综合评价注浆方法

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2026-01-21 DOI: 10.1016/j.tust.2026.107480

Lichao Nie , Pengyu Jing , Shixun Jia , Zhi-Qiang Li , Shimin Li

Fractured, water-bearing rock ahead of tunnel faces is a principal cause of water and mud inrush. Quantifying the in-situ performance of pre-excavation grouting remains challenging because the process is not directly observable. This study proposes a multi-parameter fusion framework that integrates probe drilling, water pressure tests, and horizontal cross-hole resistivity tomography for evaluating tunnel grouting in-situ. Four normalized indicators—average resistivity (R), water inflow (V), rock-mass integrity (W), and water permeability (K)—are combined using a convex-combination weighting of AHP and entropy weights and a second-order Choquet integral to obtain the interpretable, segment-level grouting-effectiveness index, which ranged from 0.6624 to 0.7577 after grouting. The fusion captures interactions among indicators while preserving physical interpretability. This evaluation method also coordinates and validates the qualitative observations of various exploration techniques before and after grouting with the quantitative analysis results, enabling a more detailed and convincing evaluation of grouting effectiveness. Applied to a complex section of the No. 2 tunnel of Xianglu Mountain in Southwest China, the framework identified post-grouting increases in resistivity and integrity and reductions in water permeability and inflow through field experiments, consistent with post-excavation observations. The results demonstrate a robust, operational approach for in-situ assessment of grouting performance that is transferable to tunnels with similar hydrogeological settings.

隧道工作面前方的裂隙含水岩是造成涌水、涌泥的主要原因。由于预开挖注浆过程不能直接观测，因此对其原位性能进行量化仍然具有挑战性。本研究提出了一种结合探针钻孔、水压试验和水平井间电阻率层析成像的多参数融合框架，用于隧道注浆原位评价。将平均电阻率(R)、涌水量(V)、岩体完整性(W)、渗透率(K) 4个归一化指标，采用AHP和熵权的凸组合加权和二阶Choquet积分相结合的方法，得到了可解释的分段级注浆效果指标，注浆后该指标取值范围为0.6624 ~ 0.7577。这种融合捕获了指标之间的相互作用，同时保留了物理可解释性。该评价方法还将注浆前后各种勘探技术的定性观测结果与定量分析结果进行了协调和验证，使注浆效果评价更加细致和有说服力。将该框架应用于西南相鹿山2号隧道某复杂断面，通过现场试验发现注浆后电阻率和完整性增加，透水性和流入减少，与开挖后观测结果一致。结果证明了一种可靠的、可操作的原位注浆性能评估方法，可应用于具有类似水文地质环境的隧道。

{"title":"An integrated in-situ evaluation grouting method based on multi-parameter fusion of probe drilling, water pressure tests, and horizontal cross-hole resistivity tomography","authors":"Lichao Nie , Pengyu Jing , Shixun Jia , Zhi-Qiang Li , Shimin Li","doi":"10.1016/j.tust.2026.107480","DOIUrl":"10.1016/j.tust.2026.107480","url":null,"abstract":"<div><div>Fractured, water-bearing rock ahead of tunnel faces is a principal cause of water and mud inrush. Quantifying the in-situ performance of pre-excavation grouting remains challenging because the process is not directly observable. This study proposes a multi-parameter fusion framework that integrates probe drilling, water pressure tests, and horizontal cross-hole resistivity tomography for evaluating tunnel grouting in-situ. Four normalized indicators—average resistivity (R), water inflow (V), rock-mass integrity (W), and water permeability (K)—are combined using a convex-combination weighting of AHP and entropy weights and a second-order Choquet integral to obtain the interpretable, segment-level grouting-effectiveness index, which ranged from 0.6624 to 0.7577 after grouting. The fusion captures interactions among indicators while preserving physical interpretability. This evaluation method also coordinates and validates the qualitative observations of various exploration techniques before and after grouting with the quantitative analysis results, enabling a more detailed and convincing evaluation of grouting effectiveness. Applied to a complex section of the No. 2 tunnel of Xianglu Mountain in Southwest China, the framework identified post-grouting increases in resistivity and integrity and reductions in water permeability and inflow through field experiments, consistent with post-excavation observations. The results demonstrate a robust, operational approach for in-situ assessment of grouting performance that is transferable to tunnels with similar hydrogeological settings.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107480"},"PeriodicalIF":7.4,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146014892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical response characteristics and influencing factors analysis of non-parallel complex subway station-tunnel groups close proximity construction 非平行复杂地铁车站-隧道群近距离施工的力学响应特性及影响因素分析

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2026-01-21 DOI: 10.1016/j.tust.2026.107472

Xinrong Liu , Lei Fang , Xiaohan Zhou , Qiang Xu , Kun Cheng

The mechanical response characteristics of the adjacent structures involving non-parallel complex subway tunnels significantly affect the stability of tunnel structures and ground settlement. To analyze the mechanical stability of both the main and auxiliary tunnels in the vicinity of the subway station, an integrated methodological framework that combines physical model testing with advanced numerical simulation techniques was adopted to precisely identify the deformation characteristics of adjacent non-parallel main and auxiliary tunnels. In addition, the study systematically investigated the influence mechanisms associated with construction sequence, construction methods, and excavation step spacing on the mechanical behavior of the tunnel structures and the stability of stratum. The results indicate that the disturbance-induced settlement of the main tunnel crown gradually decreases as adjacent non-parallel auxiliary tunnels are excavated upward. Meanwhile, as the vertical elevation difference between the main and auxiliary tunnels increases, the principal stress borne by the main tunnel lining is gradually transferred toward the lining of the auxiliary tunnel. Excavation of Auxiliary Tunnel No. 6 and the wind pavilion trigger sudden mutual deformation and abrupt stress release in the intervening rock mass; therefore, particular attention should be paid to its stability and reinforcement. The deformation of the tunnel group and the ventilation shaft structure mainly occurs during the excavation process. Construction method and step length significantly affect vault deformation and surface settlement of the tunnel group, whereas construction sequence mainly impacts stress disturbance among individual tunnels.

非平行复杂地铁隧道相邻结构的力学响应特性对隧道结构的稳定性和地面沉降有重要影响。为分析地铁车站附近主副隧道的力学稳定性，采用物理模型试验与先进数值模拟技术相结合的综合方法框架，精确识别相邻非平行主副隧道的变形特征。此外，系统探讨了施工顺序、施工方式、开挖步距对隧道结构力学性能和地层稳定性的影响机制。结果表明，随着相邻非平行副隧道的向上开挖，主隧道顶板的扰动沉降逐渐减小；同时，随着主、副隧道竖向标高差的增大，主隧道衬砌承受的主应力逐渐向副隧道衬砌转移。6号辅助隧道与风亭的开挖引起中间岩体突然相互变形和应力突然释放；因此，应特别注意其稳定性和加固。隧道群和通风竖井结构的变形主要发生在开挖过程中。施工方法和步长对隧道群拱顶变形和地表沉降有显著影响，而施工顺序主要影响单个隧道间的应力扰动。

{"title":"Mechanical response characteristics and influencing factors analysis of non-parallel complex subway station-tunnel groups close proximity construction","authors":"Xinrong Liu , Lei Fang , Xiaohan Zhou , Qiang Xu , Kun Cheng","doi":"10.1016/j.tust.2026.107472","DOIUrl":"10.1016/j.tust.2026.107472","url":null,"abstract":"<div><div>The mechanical response characteristics of the adjacent structures involving non-parallel complex subway tunnels significantly affect the stability of tunnel structures and ground settlement. To analyze the mechanical stability of both the main and auxiliary tunnels in the vicinity of the subway station, an integrated methodological framework that combines physical model testing with advanced numerical simulation techniques was adopted to precisely identify the deformation characteristics of adjacent non-parallel main and auxiliary tunnels. In addition, the study systematically investigated the influence mechanisms associated with construction sequence, construction methods, and excavation step spacing on the mechanical behavior of the tunnel structures and the stability of stratum. The results indicate that the disturbance-induced settlement of the main tunnel crown gradually decreases as adjacent non-parallel auxiliary tunnels are excavated upward. Meanwhile, as the vertical elevation difference between the main and auxiliary tunnels increases, the principal stress borne by the main tunnel lining is gradually transferred toward the lining of the auxiliary tunnel. Excavation of Auxiliary Tunnel No. 6 and the wind pavilion trigger sudden mutual deformation and abrupt stress release in the intervening rock mass; therefore, particular attention should be paid to its stability and reinforcement. The deformation of the tunnel group and the ventilation shaft structure mainly occurs during the excavation process. Construction method and step length significantly affect vault deformation and surface settlement of the tunnel group, whereas construction sequence mainly impacts stress disturbance among individual tunnels.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107472"},"PeriodicalIF":7.4,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146014891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Intelligent and autonomous pipeline deposit tracking based on a multi-object tracking framework 基于多目标跟踪框架的管道沉积物智能自主跟踪

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2026-01-21 DOI: 10.1016/j.tust.2026.107463

Louis Ngai Yuen Wong , Sihao Yu , Kazaf Yuen Pan Wong

Pipelines play a significant role in transferring energies, materials and fulfilling public needs. However, conventional pipeline maintenance approaches predominantly depend on human inspection of captured closed circuit television (CCTV) records, a process that is particularly labor-intensive and time-consuming for lengthy pipelines. To address these limitations, this study proposes an autonomous framework based on the multi-object tracking (MOT) algorithm for efficient and accurate deposit detection and tracking within pipelines, significantly reducing the need for manual intervention. The proposed MOT model has been trained and validated on a customized pipe CCTV dataset, consisting of more than 12,000 video frames. The experimental results indicate that the combination of YOLOX (for detection) and BYTE (for tracking) achieves the highest MOTA, IDF1 and HOTA among all the tested models, with values of 87.4 %, 90.1 % and 78.7 %, respectively. Further testing conducted on a real-world sewer pipeline project demonstrates the robustness of our model. The estimation error of the deposit location predicted by the MOT model is less than ± 0.1 m, with a mean absolute error of only 0.06 m. These findings highlight the substantial advantages of the autonomous MOT system over manual methods, including improved efficiency, consistent accuracy and reduced labor demands, thus demonstrating its reliability and significant application potential for practical engineering practice.

管道在输送能源、物资和满足公众需求方面发挥着重要作用。然而，传统的管道维护方法主要依赖于人工检查捕获的闭路电视（CCTV）记录，对于长管道来说，这一过程特别劳动密集且耗时。为了解决这些限制，本研究提出了一种基于多目标跟踪（MOT）算法的自主框架，用于高效准确地检测和跟踪管道内的沉积物，大大减少了人工干预的需要。提出的MOT模型已经在一个定制的管道CCTV数据集上进行了训练和验证，该数据集包含超过12,000个视频帧。实验结果表明，YOLOX（用于检测）和BYTE（用于跟踪）组合的MOTA、IDF1和HOTA值在所有测试模型中最高，分别为87.4%、90.1%和78.7%。在实际污水管道项目上进行的进一步测试证明了我们模型的稳健性。MOT模型预测的矿床位置估计误差小于±0.1 m，平均绝对误差仅为0.06 m。这些发现突出了自主MOT系统相对于人工方法的巨大优势，包括提高效率、保持一致的准确性和减少劳动力需求，从而证明了其可靠性和在实际工程实践中的重大应用潜力。

{"title":"Intelligent and autonomous pipeline deposit tracking based on a multi-object tracking framework","authors":"Louis Ngai Yuen Wong , Sihao Yu , Kazaf Yuen Pan Wong","doi":"10.1016/j.tust.2026.107463","DOIUrl":"10.1016/j.tust.2026.107463","url":null,"abstract":"<div><div>Pipelines play a significant role in transferring energies, materials and fulfilling public needs. However, conventional pipeline maintenance approaches predominantly depend on human inspection of captured closed circuit television (CCTV) records, a process that is particularly labor-intensive and time-consuming for lengthy pipelines. To address these limitations, this study proposes an autonomous framework based on the multi-object tracking (MOT) algorithm for efficient and accurate deposit detection and tracking within pipelines, significantly reducing the need for manual intervention. The proposed MOT model has been trained and validated on a customized pipe CCTV dataset, consisting of more than 12,000 video frames. The experimental results indicate that the combination of YOLOX (for detection) and BYTE (for tracking) achieves the highest MOTA, IDF1 and HOTA among all the tested models, with values of 87.4 %, 90.1 % and 78.7 %, respectively. Further testing conducted on a real-world sewer pipeline project demonstrates the robustness of our model. The estimation error of the deposit location predicted by the MOT model is less than ± 0.1 m, with a mean absolute error of only 0.06 m. These findings highlight the substantial advantages of the autonomous MOT system over manual methods, including improved efficiency, consistent accuracy and reduced labor demands, thus demonstrating its reliability and significant application potential for practical engineering practice.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"171 ","pages":"Article 107463"},"PeriodicalIF":7.4,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146014887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0