Underground Space最新文献_第2页

Experimental study on rock damage and failure induced by multi-source dynamic disturbances 多源动力扰动对岩石损伤破坏的实验研究

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2026-02-01 Epub Date: 2025-12-04 DOI: 10.1016/j.undsp.2025.09.003

Han-Yi Liu, Ben-Guo He, Jia-Hua Guan, Hong-Yuan Fu

Research into the mechanical behaviour of rock surrounding the deep-buried tunnel under multi-source dynamic disturbance is key to the safety of underground engineering operations. Based on a dynamic true-triaxial testing apparatus, the present study examined the mechanical behaviours and fracture mechanisms of deep granite under the coupled effects of intermediate-frequency dynamic disturbance (f = 300 Hz) and low-frequency dynamic disturbance (f = 5–20 Hz). Intermediate-frequency dynamic disturbance markedly initiates the genesis of tensile micro-cracks within rock, while low-frequency dynamic disturbance exacerbates the propagation and interconnection of cracks, ultimately leading to the formation of a tensile-shear mixed failure mode. The severity of the influence of intermediate-frequency disturbance on the peak strength of rock is the initial crack compaction σ_cc (decreased by 8.1%), the damage stress σ_cd (decreased by 6.4%), and the crack initiation stress σ_ci (decreased by 4.7%) under different disturbance timings. This changes the characteristic stress of the rock and significantly decreases its brittleness index. Meanwhile, the low-frequency f of weak disturbance significantly affects the failure mode and peak strength of the rock. The peak strength σ_p exhibits U-shaped variation, with the maximum decrease reaching 15 MPa, which indicates the presence of a resonance effect between the external disturbance and the natural frequency of the rock. The timing of intermediate-frequency disturbance alters the natural frequency of the rock. Analysis of the fracture surface shows that cracks induced by intermediate-frequency disturbance primarily propagate along the σ₁-direction, while low-frequency disturbance promotes propagation of shearing cracks along the σ₃-direction. Brittle failure occurs due to the through-going shearing cracks. The results further reveal the synergistic mechanism of action of multi-source dynamic disturbance on rock failure, indicating that the coupled effects of multi-source dynamic disturbances significantly increase the risk of brittle failure in the rock mass.

多源动力扰动作用下深埋隧道围岩的力学行为研究是影响地下工程安全运行的关键。基于动态真三轴试验装置，研究了中频动态扰动（f = 300 Hz）和低频动态扰动（f = 5 ~ 20 Hz）耦合作用下深部花岗岩的力学行为和断裂机制。中频动力扰动显著地启动了岩石内部拉伸微裂纹的形成，低频动力扰动则加剧了裂缝的扩展和连接，最终导致拉剪混合破坏模式的形成。不同干扰时间中频扰动对岩石峰值强度的影响程度分别为初始裂纹压实σcc（减小8.1%）、损伤应力σcd（减小6.4%）和裂纹起裂应力σci（减小4.7%）。这改变了岩石的特征应力，显著降低了岩石的脆性指数。同时，弱扰动的低频f显著影响岩石的破坏模式和峰值强度。峰值强度σp呈u型变化，最大降幅达15 MPa，表明外部扰动与岩石固有频率之间存在共振效应。中频扰动的发生时间改变了岩石的固有频率。断口形貌分析表明，中频扰动诱发的裂纹主要沿σ1方向扩展，低频扰动诱发的剪切裂纹主要沿σ3方向扩展。脆性破坏是由贯通的剪切裂纹引起的。结果进一步揭示了多源动力扰动对岩石破坏的协同作用机制，表明多源动力扰动的耦合作用显著增加了岩体脆性破坏的风险。

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引用次数: 0

Thrust-vectoring automatic shield tunneling technology: Method, verification and application 推力矢量自动盾构掘进技术：方法、验证与应用

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2026-02-01 Epub Date: 2025-10-24 DOI: 10.1016/j.undsp.2025.01.008

Yeting Zhu , Di Wu , Zhihua Wang , Zixin Zhang , Shuaifeng Wang , Xin Huang , Yuan Qin , Yanfei Zhu , Fan Wang

Recognizing the formidable challenge of achieving millimeter-level precision in controlling shield machine attitudes amidst thrust forces exceeding thousands of tons on a global scale, a thrust-vectoring automatic shield tunneling technology was introduced to effectively mitigate potential inaccuracies stemming from human intervention. Initially, a load-thrust “dual-vector” motion control mechanism was adopted, grounded in defining the shield thrust vector and establishing the interactive correlation between shield attitude deviation points and thrust action points in both horizontal and vertical orientations through comprehensive data assessments. Subsequently, a parallel proportional-integral-derivative control law was devised for stability control of shield machines, delineating the functional link between alterations in shield attitudes and displacements of thrust action points, with initial validation conducted via full-scale model trials. A motion trajectory for correcting shield attitudes was devised, and a thrust vector control approach was formulated by amalgamating feedforward calculations with feedback adjustments. The application of this thrust-vectoring automatic tunneling technology in a large-diameter shield tunneling endeavor yielded the subsequent key findings: a consistent deviation of approximately 2.5% was upheld between target and actual thrust forces, with actual shield velocity managed within a –1 to +1 mm/min range from the target value. To ensure robust steering capability of the shield machine, target thrust moments in both horizontal and vertical directions marginally exceeded actual values, with satisfactory execution. The interplay between shield attitudes and thrust action points in both horizontal and vertical dimensions exhibited a characteristic akin to “sugar-coated haws on a stick”. Despite notable “kowtow” occurrences during segment assembly, statistical analysis indicated that deviations in shield attitude in horizontal and vertical planes were ultimately contained within –20 to +5 mm and –45 to –28 mm ranges, respectively, markedly surpassing average manual control standards.

认识到在全球范围内超过数千吨的推力下实现毫米级精度控制盾构机姿态的艰巨挑战，引入了推力矢量自动盾构隧道技术，以有效减轻人为干预造成的潜在不准确性。首先，采用载荷-推力“双矢量”运动控制机制，在确定盾构推力矢量的基础上，通过综合数据评估，建立盾构姿态偏差点与推力作用点在水平和垂直方向上的交互关系。随后，设计了用于盾构机稳定性控制的并联比例-积分-导数控制律，描述了盾构姿态变化与推力作用点位移之间的功能联系，并通过全尺寸模型试验进行了初步验证。设计了修正盾构姿态的运动轨迹，提出了前馈计算与反馈调整相结合的推力矢量控制方法。该推力矢量自动掘进技术在大直径盾构掘进中的应用取得了以下重要发现：目标推力与实际推力之间的偏差约为2.5%，实际盾构速度与目标值的偏差范围在-1 ~ +1 mm/min之间。为了保证盾构机稳定的转向能力，在水平和垂直方向上的目标推力力矩都略大于实际值，执行情况令人满意。在水平和垂直维度上，盾牌姿态和推力作用点之间的相互作用表现出类似于“棒子上的糖衣山楂果”的特征。尽管在分段装配过程中出现了明显的“磕头”现象，但统计分析表明，水平和垂直平面上的屏蔽姿态偏差最终分别被控制在-20至+5 mm和-45至-28 mm的范围内，明显超过了平均的手动控制标准。

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引用次数: 0

Response law of rock-cutterhead interaction in intact sandstone through TBM tunnelling test 通过TBM隧道试验研究完整砂岩岩刀相互作用的响应规律

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2026-02-01 Epub Date: 2025-10-24 DOI: 10.1016/j.undsp.2025.06.006

Weiqiang Xie , Xiaoli Liu , Caifeng Zhang , Xiaoxiong Zhou , Jian Chen

The unclear response law of rock-cutterhead interaction seriously limits the tunnel boring machine (TBM) efficiency. Various influencing factors make it difficult to illustrate the law using the TBM tunnelling results in the field. In the present study, we develop a novel TBM tunnelling test platform (DGTBM-A) to analyze rock-cutterhead interaction. The components and functions of the platform are introduced. The cubic sandstone specimens (500 mm

\times

500 mm

\times

500 mm) with three distinct uniaxial compressive strengths (low (24.94 MPa), medium (61.22 MPa), and high (95.04 MPa) are used for TBM tunnelling test. The effects of cutterhead thrust, rotational speed and rock strength on the rock-cutterhead interaction are examined. Key tunnelling parameters, TBM performance indices, and rock muck characteristics are analyzed to reflect their effects. The findings revealed significant impacts of cutterhead thrust, rotational speed and rock strength on torque, advance rate, penetration rate, specific energy, and field penetration index. Additionally, the characteristics of the produced rock muck varied with the applied tunnelling parameters, providing insights into the efficiency and effectiveness of rock breaking. Correlations between the TBM performance indices and the influencing factors are established. The results contribute to a better understanding of the mechanics involved in TBM tunnelling in sandstone, aiding in optimizing operational parameters for improved performance and cost-efficiency in engineering practice.

岩刀相互作用的响应规律不明确，严重制约了隧道掘进机的掘进效率。由于各种因素的影响，难以在现场用隧道掘进机的开挖结果来说明这一规律。在本研究中，我们开发了一种新的TBM掘进试验平台（DGTBM-A）来分析岩石-刀盘相互作用。介绍了平台的组成和功能。采用单轴抗压强度低（24.94 MPa）、中（61.22 MPa）、高（95.04 MPa） 3种不同强度的立方体砂岩试件（500 mm × 500 mm × 500 mm）进行TBM掘进试验。研究了刀盘推力、转速和岩石强度对刀盘岩石相互作用的影响。分析了关键掘进参数、掘进机性能指标和岩屑特征，以反映其影响。研究结果表明，刀盘推力、转速和岩石强度对扭矩、推进速度、穿透速度、比能和现场穿透指数有显著影响。此外，所产生的岩石泥的特征随所应用的隧道参数而变化，这为岩石破碎的效率和有效性提供了见解。建立了掘进机性能指标与影响因素之间的相关性。研究结果有助于更好地理解隧道掘进机在砂岩中的掘进力学，有助于优化操作参数，以提高工程实践中的性能和成本效益。

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引用次数: 0

Influence of roughness on the mechanical response of rock-like specimens with nonpersistent joints under uniaxial compression based on joint deformation analysis 基于节理变形分析的单轴压缩下粗糙度对非持久节理类岩石试件力学响应的影响

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2026-02-01 Epub Date: 2025-11-20 DOI: 10.1016/j.undsp.2025.09.001

Hong Yin , Zehui Gao , Yulong Shao , Shuhong Wang , Jae-Joon Song , Ye Wang , Jineon Kim , Shan Guo

Joint deformation is a key factor controlling the mechanical behavior of discontinuous rock strata under changing stress conditions, including dominating the elastic deformation in near-surface excavations and serving as a major component of settlement under higher stress. This study, focusing on joint deformation behavior, investigates the effect of joint roughness on the peak stress and failure modes of specimens under uniaxial compression. Rock-like specimens with two layers of parallel, nonpersistent joints, one rough, were fabricated using 3D printing technology. Digital image correlation was used to capture real-time surface displacement fields, and a joint deformation analysis method was developed. The results show that joints exhibit staged, non-uniform closure and slip behavior, influenced by joint roughness, distribution of primary and secondary joints, and layered arrangement. Rough joints accelerate closure but hinder slip coordination, resulting in a three-stage loading process. In stage I, primary closure and layer-coordinated slip occur, accompanied by crack initiation, joint coalescence, and steady stress growth. Stage II involves secondary closure and overall coordinated slip, leading to localized failure and stress stabilization. Stage III is characterized by complete closure, uncoordinated slip, intensified crack propagation, and specimen failure, accompanied by stress hardening. The study reveals that joint deformation serves as a bridge linking roughness and peak strength. The average joint closure level and slip coordination are linearly negatively correlated with roughness but nonlinearly positively correlated with peak strength. Roughness restricts slip coordination, limiting crack propagation and delaying failure, which slows stress growth. Redistribution of joint aperture during slip reduces joint closure, weakens wall contact, and diminishes stress hardening.

节理变形是控制非连续岩体在变应力条件下力学行为的关键因素，在近地表开挖中主导弹性变形，是高应力下沉降的主要组成部分。本研究着眼于节理的变形行为，研究了节理粗糙度对单轴压缩下试件峰值应力和破坏模式的影响。用3D打印技术制造了两层平行的岩石样样品，其中一层是粗糙的。采用数字图像相关技术实时捕获地表位移场，并建立了一种关节变形分析方法。结果表明：受节理粗糙度、主、次节理分布和层状排列的影响，节理表现出阶段性、非均匀闭合和滑移行为；粗糙的接头加速了闭合，但阻碍了滑移协调，导致了三个阶段的加载过程。在第一阶段，发生初级闭合和层间协调滑移，伴随着裂纹萌生、节理合并和稳定的应力增长。第二阶段涉及二次闭合和整体协调滑动，导致局部破坏和应力稳定。阶段III的特征是完全闭合，滑移不协调，裂纹扩展加剧，试样破坏，并伴有应力硬化。研究表明，节理变形是连接粗糙度和峰值强度的桥梁。平均节理闭合水平和滑移协调性与粗糙度呈线性负相关，与峰值强度呈非线性正相关。粗糙度限制了滑移协调，限制了裂纹扩展，延缓了破坏，减缓了应力增长。滑移过程中节理孔径的重新分布减少了节理闭合，减弱了壁面接触，减少了应力硬化。

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引用次数: 0

Preliminary risk assessment of metro lines subjected to adjacent disturbance with time-series InSAR 基于时间序列InSAR的相邻扰动地铁线路风险初步评估

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2026-02-01 Epub Date: 2025-12-01 DOI: 10.1016/j.undsp.2025.09.002

Zhiwen Xu , Suhua Zhou , Qingshan Zhang , Jiuchang Zhang , Chuting Huang

The urban metro system is a crucial infrastructure for sustainable urban development. However, ground engineering disturbances, such as foundation pit excavations and overloading, can cause damage to the metro structure, including cracks and water leakage. By integrating small baseline subset synthetic aperture radar interferometry (SBAS-InSAR) technology, this study develops a preliminary risk assessment methodology for metro lines that are subjected to ground engineering disturbances. A relevant case from Changsha was proposed, spanning from January 2017 to July 2023, using a dataset of 147 Sentinel satellite images. Key findings include: (1) InSAR technology effectively monitors ground settlement, the areas with significant construction activities, the average annual settlement rate typically exceeds −6 mm/yr, with some regions reaching up to −10 mm/yr. In contrast, most areas without ground disturbance usually experience surface settlement not exceeding −2 mm/yr. (2) Satellite imagery analysis of metro areas with settlement differences greater than 20 mm revealed that most of these regions are influenced by foundation pit excavation, and some regions may be influenced by soil consolidation. (3) Overall, metro lines in Changsha have a low risk level, with certain areas classified as “high risk”. In the high-risk sections, Line 2 and Line 6 account for 32.7% and 20%, respectively, and regular inspections are required. This study would be beneficial to sustainable urban transportation.

城市地铁系统是城市可持续发展的重要基础设施。然而，地面工程扰动，如基坑开挖和超载，会对地铁结构造成破坏，包括裂缝和漏水。通过集成小基线子集合成孔径雷达干涉测量（SBAS-InSAR）技术，本研究开发了一种受地面工程干扰的地铁线路的初步风险评估方法。在2017年1月至2023年7月期间，利用147张Sentinel卫星图像的数据集，提出了长沙的相关案例。主要发现包括：(1)InSAR技术能有效监测地表沉降，在建筑活动量较大的区域，年平均沉降速率一般超过−6 mm/yr，部分区域可达−10 mm/yr。相比之下，大多数没有地面扰动的地区的地表沉降通常不超过- 2毫米/年。(2)沉降差异大于20 mm的地铁区域的卫星影像分析表明，大部分区域受基坑开挖的影响，部分区域可能受土体固结的影响。(3)长沙市地铁线路总体风险水平较低，部分区域为“高风险”区域。在高危路段，2号线和6号线分别占32.7%和20%，并需要定期检查。本研究对城市交通可持续发展具有一定的指导意义。

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引用次数: 0

Excavation-induced fracturing mechanisms in deep hard rock: A hierarchical block model 深部硬岩开挖致裂机制：一个分层块体模型

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2026-02-01 Epub Date: 2025-11-10 DOI: 10.1016/j.undsp.2025.07.002

Shili Qiu , Shirui Zhang , Quan Jiang , Yuheng Fang , Ping Li , Shaojun Li , Yaxun Xiao , Dingping Xu

The fracture characteristics of the excavation damage zones (EDZs) of deeply buried tunnels are closely related to energy evolution, and they are highly valuable for support design. Advanced numerical simulation techniques have shown the potential for evaluating the EDZ properties. On the basis of the finite-discrete element method (FDEM) and Poisson’s random block generation technique, the virtual block model (VBM) is proposed to characterize the intact rock masses surrounding tunnels. Moreover, a virtual block upscale principle (VB-UP) is proposed to determine the geometric and meso-mechanical parameters. The Canadian Underground Research Laboratory (URL) and China Jinping Underground Laboratory Phase II (CJPL-II) project excavations are simulated, and the excavation-induced fracture characteristics of the surrounding rock masses are analyzed in detail. The VBM captures the tensile, shear, and mixed fracture properties under excavation-induced confining pressure evolution. Then, the thicknesses of the spalling rock slabs in Lab #7 of the CJPL-II project are evaluated via the Otsu method. Combined with onsite monitoring data, the validity and advancement of the VBM are verified. This study expands the applicability of the FDEM and provides a new method for assessing the EDZs of surrounding rocks.

深埋隧道开挖损伤区的断裂特征与能量演化密切相关，对支护设计具有重要的参考价值。先进的数值模拟技术已经显示出评估EDZ特性的潜力。在有限离散元法（FDEM）和泊松随机块体生成技术的基础上，提出了隧道围岩完整体的虚拟块体模型（VBM）。此外，还提出了一种虚拟块体升级原理（VB-UP）来确定几何参数和细观力学参数。VBM捕获了在开挖引起的围压演化下的拉伸、剪切和混合破裂特性。然后，采用Otsu法对CJPL-II项目7号实验室剥落岩板的厚度进行了评价。结合现场监测数据，验证了该方法的有效性和先进性。该研究扩展了FDEM的适用性，为评价围岩edz提供了一种新的方法。

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引用次数: 0

Review on heat transfer and thermo-mechanical behaviour of energy geostructures 能源土工结构的传热与热力学特性研究进展

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2026-02-01 Epub Date: 2025-10-10 DOI: 10.1016/j.undsp.2025.06.003

Duofeng Cen , Caichu Xia

Energy geostructures represent a novel building energy-saving technology derived from ground source heat pump technology. Heat transfer and thermo-mechanical response characteristics stand out as pivotal issues in the investigation and design of such energy geostructures. This paper provides an overview of the research on heat transfer models, factors influencing heat exchange performance, and thermo-mechanical behaviour concerning energy piles, energy walls, and energy tunnels. The future perspectives were also presented. Four types consisting of ten basic heat transfer models for energy piles were summarized, and their advantages, limitations, and applicable scenarios were comprehensively discussed from multiple aspects. The heat transfer models for energy walls and energy tunnels are scarce, and only one model was introduced for each of them. The influences of some controllable design parameters on the thermal performance of energy geostructures and the thermal-induced mechanical behaviour were summarized. The key conclusions are that the fluid flow rate should not be too high or too low, which is generally considered sufficient to ensure that the flow state is turbulent; and properly intermittent operation is beneficial to the recovery of geothermy, thereby improving the heat exchange performance. Due to the differing conditions considered, it is not possible to draw a definitive conclusion regarding whether heating can increase or decrease the shaft resistance or bearing capacity of energy piles. Generally, thermal effects within energy walls are unlikely to cause severe damage to structural stability. The issues related to thermal-induced ground deformation are considered more critical than those concerning the energy tunnel structure deformation. This paper highlights the aspects that require further research and the new aspects worth exploring in the future. Energy geostructures are not limited to new construction projects, and combining with other renewable energy utilization methods and integrating into district energy networks are the future development trends.

能源土工结构是在地源热泵技术的基础上发展起来的一种新型建筑节能技术。在此类能源土工结构的研究和设计中，传热和热-力学响应特性是关键问题。本文综述了能量桩、能量墙和能量隧道的传热模型、换热性能影响因素和热力学行为的研究进展。还提出了对未来的展望。总结了能源桩的四种基本传热模型，包括十种基本传热模型，并从多个方面全面讨论了它们的优势、局限性和适用场景。能量墙和能量隧道的换热模型比较少，分别只介绍了一种模型。总结了一些可控设计参数对能源土工结构热性能和热致力学性能的影响。关键结论是流体流速不宜过高或过低，一般认为这足以保证流动状态为湍流状态；适当的间歇操作有利于地热的回收，从而提高换热性能。由于考虑的条件不同，对于加热是否会增加或降低能源桩的轴阻或承载力，还不能得出明确的结论。一般来说，能量壁内的热效应不太可能对结构稳定性造成严重破坏。热致地面变形问题被认为比能量隧道结构变形问题更为重要。本文强调了需要进一步研究的方面和未来值得探索的新方面。能源土工结构已不局限于新建项目，与其他可再生能源利用方式相结合、融入区域能源网络是未来的发展趋势。

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引用次数: 0

Evolution of mechanical properties of shield tunnels induced by water-soil gushing 水-土涌作用下盾构隧道力学特性演化

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2026-02-01 Epub Date: 2025-10-24 DOI: 10.1016/j.undsp.2024.12.008

Xiao-Chuang Xie , Dong-Mei Zhang , Ming-Liang Zhou

Water and soil gushing in shield tunnels pose a significant risk to tunnel structure safety. However, it is challenging to fully capture the evolution of the mechanical response of tunnel structures due to the limitations of conventional numerical methods in simulating large soil deformations around the tunnel due to gushing. This paper developed a coupled material point method (MPM) and finite element method (FEM) approach for water and soil gushing, where MPM was for modelling the soil deformation and FEM was for modelling the tunnel response. The developed approach was utilized to conduct the gushing-induced large deformation analyses and generate the varying soil and water pressures acting on the tunnel lining. Meanwhile, structural internal forces and joint deformations were identified based on the load-structure method. The findings suggest that the gushing process can be categorized into three stages: initial developing, rapid developing, and stable developing stages. The soil and water pressures around the gushing point decreased abruptly during the “rapid developing stage”, but the soil pressures on the tunnel crown and tunnel invert increase, causing a sharp rise in the bending moment of the lining and severe joint deformations, particularly at joints No. 2 and No. 3. Finally, the parametric analyses show that a lower gushing location, deeper tunnel depth, and higher soil shear strength will all exacerbate the influence of water-soil gushing on tunnel structural response, due to variations in the soil and water pressures acting on the tunnel lining throughout the whole process of gushing. These findings underscore the importance of revealing the evolution of tunnel responses to water-soil gushing for maintaining tunnel safety.

盾构隧道的涌水和涌土对隧道结构的安全构成重大威胁。然而，由于传统的数值方法在模拟隧道周围土体因涌水引起的大变形时存在局限性，因此难以完全捕捉隧道结构力学响应的演变过程。本文建立了土体涌水的材料点法和有限元耦合方法，其中材料点法模拟土体变形，有限元模拟隧道响应。利用该方法对隧道衬砌进行了喷流大变形分析，得到了作用在衬砌上的土、水压力的变化规律。同时，基于荷载-结构法对结构内力和节点变形进行了识别。研究结果表明，喷淋过程可分为初始发展阶段、快速发展阶段和稳定发展阶段。在“快速发展阶段”，涌点附近的土压力和水压力急剧下降，但隧道顶部和隧道仰拱处的土压力增加，导致衬砌弯矩急剧上升，节理变形严重，特别是2号和3号节理。参数分析结果表明，随着涌水位置越低、隧道深度越深、土体抗剪强度越高，由于整个涌水过程中作用在隧道衬砌上的土体和水压力的变化，会加剧水-土涌对隧道结构响应的影响。这些发现强调了揭示隧道对水-土涌反应的演变对维护隧道安全的重要性。

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引用次数: 0

Incorporating smart computer vision and in-drilling information into rock quality evaluation via incomplete data-driven Bayesian networks 通过不完全数据驱动的贝叶斯网络，将智能计算机视觉和钻孔信息整合到岩石质量评价中

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2026-02-01 Epub Date: 2025-10-15 DOI: 10.1016/j.undsp.2025.03.007

Chen Wu , Minglun Tan , Yue Tong , Hongwei Huang

Tunnelling is a challenging task due to a lack of full understanding of the surrounding rock quality. This study proposes a solution driven by a refined computer vision (CV) method, complemented by rock mass drilling tests and Bayesian networks, to address this issue through a multi-source heterogeneous data approach. Initially, improvements are made to the popular Swin Transformer to improve the recognition and segmentation of intricate rock features. Notably, refined smart CV, owing to its U-shaped architecture and smart window self-attention computation, exhibits segmentation performance superior to that of conventional CV methods such as Swin Transformer, Deeplab V3+, and UNet. Building upon the segmentation outcomes of the refined CV, a parameter set comprising apparent rock parameters is established. Then, two datasets encompassing rock internal drilling parameters and mechanics, as well as design parameters, are curated. The combination of the aforementioned parameter sets is referred to as the rock quality comprehensive evaluation dataset. However, analysis reveals data incompleteness issues within these datasets. To mitigate this problem, a novel tree-augmented Bayesian network is designed, and a prediction accuracy of 91% is realized, surpassing popular decision trees, ensemble learning, and deep learning methods. Furthermore, evaluation services are provided in mountain and submarine tunnels, suggesting that drilling parameters significantly enhance the evaluation performance. Moreover, employing two sensitivity analysis metrics underscores the prominent influence of rotating pressure and drilling speed parameters. This study endeavor presents diverse solutions for achieving precise and expeditious predictions of rock quality through various parameter sets, tailored to cater to diverse requirements of tunnels.

由于缺乏对围岩质量的充分了解，隧道掘进是一项具有挑战性的任务。本研究提出了一种由精细计算机视觉（CV）方法驱动的解决方案，辅以岩体钻探试验和贝叶斯网络，通过多源异构数据方法解决这一问题。首先，对流行的Swin Transformer进行了改进，以提高对复杂岩石特征的识别和分割。值得注意的是，精细化的智能CV由于其u型架构和智能窗口自关注计算，其分割性能优于Swin Transformer、Deeplab V3+、UNet等传统CV方法。基于改进CV的分割结果，建立了包含表观岩石参数的参数集。然后，收集两个数据集，包括岩石内部钻井参数和力学以及设计参数。上述参数集的组合称为岩石质量综合评价数据集。然而，分析揭示了这些数据集中的数据不完整问题。为了缓解这一问题，设计了一种新的树增强贝叶斯网络，实现了91%的预测精度，超过了流行的决策树、集成学习和深度学习方法。此外，在山地和海底隧道中提供了评估服务，表明钻井参数显著提高了评估性能。此外，采用两个灵敏度分析指标强调了旋转压力和钻井速度参数的显著影响。本研究提出了多种解决方案，通过不同的参数集来实现精确和快速的岩石质量预测，以满足隧道的不同要求。

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引用次数: 0

Probabilistic seismic response analysis of tunnel linings considering coupled rock mass property and earthquake excitation uncertainties 考虑岩体特性耦合和地震激励不确定性的隧道衬砌概率地震反应分析

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2026-02-01 Epub Date: 2025-11-19 DOI: 10.1016/j.undsp.2025.08.001

Xiancheng Mei , Jiajun Wu , Baiyi Li , Zhen Cui , Chong Yu , Qian Sheng , Jian Chen

Tunnel lining seismic performance is significantly influenced by the spatial variability of geological parameters and the uncertainty of earthquake excitation factors, which are conventionally treated in isolation. This study proposes a novel probabilistic framework that integrates random field theory with an enhanced Clough–Penzien spectrum to concurrently model both uncertainty sources. The approach offers a more realistic and integrated assessment of seismic risk for tunnels under complex geological and loading conditions. The case analysis of a railway project reveals that considering both spatial variability of rock mass and uncertainty in seismic excitation leads to significant increases in internal forces and their variability, with mean values rising up to 278.9% and coefficients of variation (COV) up to 262.8%, compared to single-factor random analyses. The non-normal distribution of responses under seismic uncertainty, combined with the broader dispersion from rock variability, necessitates integrating both random factors for reliable seismic performance assessment of tunnels. Parametric studies demonstrate spectral parameters, including initial circular frequency (ω₀), equivalent damping ratio (ξ₀), and peak acceleration (a_max), significantly influence results: increasing ω₀ and ξ₀ markedly reduces both the mean and COV of lining mechanical response-by up to 83.5% and 82.5%, respectively-potentially underestimating failure risk and underscoring the need to adopt lower-bound values in design for enhanced safety. Meanwhile, a_max positively correlates with mean structural response, while variability in internal forces follows distinct trajectories; moreover, the interaction between rock spatial variability and seismic uncertainty raises failure probabilities by 3%–38%, emphasizing the necessity of integrating both randomness sources, especially in high-intensity seismic regions.

隧道衬砌的抗震性能受地质参数的空间变异性和地震激励因素的不确定性的显著影响，这些因素通常被孤立地处理。本研究提出了一种新的概率框架，该框架将随机场理论与增强的Clough-Penzien谱结合起来，同时模拟两个不确定性源。该方法为复杂地质和荷载条件下隧道地震危险性的综合评估提供了更为现实的依据。对某铁路工程的实例分析表明，考虑岩体空间变异性和地震激励的不确定性，与单因素随机分析相比，内力及其变异性显著增加，平均值可达278.9%，变异系数（COV）可达262.8%。地震不确定性下响应的非正态分布，再加上岩石变异性的广泛分散，需要将这两种随机因素结合起来，才能进行可靠的隧道抗震性能评估。参数研究表明，包括初始圆频率（ω0）、等效阻尼比（ξ0）和峰值加速度（amax）在内的频谱参数对结果有显著影响：ω0和ξ0的增加显著降低了衬里机械响应的均值和COV——分别高达83.5%和82.5%——这可能低估了失效风险，并强调了在设计中采用下限值以增强安全性的必要性。同时，amax与平均结构响应呈正相关，而内力的变异性遵循明显的轨迹；此外，岩石空间变异性和地震不确定性之间的相互作用使破坏概率增加了3%-38%，强调了整合这两种随机性来源的必要性，特别是在高烈度地震区域。

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