Tunnelling and Underground Space Technology最新文献_第10页

Mechanical behavior of disjointed concrete pipes under combined traffic loads and groundwater fluctuations 交通荷载和地下水波动联合作用下混凝土断口管道的力学行为

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

Tunnelling and Underground Space Technology

Pub Date : 2026-04-01 Epub Date: 2025-12-27 DOI: 10.1016/j.tust.2025.107414

Peng Xie , Junling Bu , Yulin Yang , Bin Li

Frequent road collapses in Guangzhou, China, have been linked to disjoints in underground drainage pipes. Clarifying the mechanical behavior of disjointed pipes under complex service conditions is of critical significance for targeted rehabilitation. This study focuses on concrete drainage pipes during the initial stage of disjoint, wherein significant erosion of the surrounding soil has not yet developed. The combined effects of traffic loads and groundwater level fluctuations were considered. Full-scale model box tests and 3D refined numerical simulations were conducted to systematically investigate the influence of disjoint on the mechanical behavior of the concrete pipe. Further parametric analyses were conducted to examine the effects of traffic load magnitude, soil cover depth, groundwater level, pipe diameter, and dislocation length on the hoop bending moments at the bell and spigot. The results demonstrate that disjointing induces stress concentration at the bell and spigot joints, with the maximum vertical displacement and hoop bending moment increasing by 12 % and 837 % compared to intact pipes. Increases in traffic load from 0.5 to 1.0 MPa and pipe diameters from 400 to 600 mm significantly amplify the hoop bending moments at both the bell and spigot joints. In contrast, greater soil cover depth and elevated groundwater levels substantially mitigate these moments. Disjoint length has a nonlinear influence, with bell moment peaking and then declining, while the spigot moment continues to rise, reaching a 135 % increase.

中国广州频繁发生的道路坍塌与地下排水管道断裂有关。弄清断裂管道在复杂使用条件下的力学行为对有针对性的修复具有重要意义。本研究的重点是混凝土排水管处于断裂初期，此时对周围土壤还没有形成明显的侵蚀。考虑了交通荷载和地下水位波动的综合影响。通过全尺寸模型箱试验和三维精细化数值模拟，系统研究了断裂对混凝土管道力学性能的影响。进一步进行了参数化分析，考察了交通荷载大小、土壤覆盖深度、地下水位、管径、位错长度等因素对钟口和插口弯矩的影响。结果表明：与完整管柱相比，分离后管柱钟形和承形处应力集中，最大垂直位移和弯矩分别增加了12%和837%；当交通载荷从0.5 MPa增加到1.0 MPa，管径从400 mm增加到600 mm时，钟形接头和承插接头的弯矩都显著增大。相比之下，更大的土壤覆盖深度和更高的地下水位大大减轻了这些时刻。断接长度具有非线性影响，钟形矩达到峰值后下降，而柱塞矩持续上升，增幅达135%。

{"title":"Mechanical behavior of disjointed concrete pipes under combined traffic loads and groundwater fluctuations","authors":"Peng Xie , Junling Bu , Yulin Yang , Bin Li","doi":"10.1016/j.tust.2025.107414","DOIUrl":"10.1016/j.tust.2025.107414","url":null,"abstract":"<div><div>Frequent road collapses in Guangzhou, China, have been linked to disjoints in underground drainage pipes. Clarifying the mechanical behavior of disjointed pipes under complex service conditions is of critical significance for targeted rehabilitation. This study focuses on concrete drainage pipes during the initial stage of disjoint, wherein significant erosion of the surrounding soil has not yet developed. The combined effects of traffic loads and groundwater level fluctuations were considered. Full-scale model box tests and 3D refined numerical simulations were conducted to systematically investigate the influence of disjoint on the mechanical behavior of the concrete pipe. Further parametric analyses were conducted to examine the effects of traffic load magnitude, soil cover depth, groundwater level, pipe diameter, and dislocation length on the hoop bending moments at the bell and spigot. The results demonstrate that disjointing induces stress concentration at the bell and spigot joints, with the maximum vertical displacement and hoop bending moment increasing by 12 % and 837 % compared to intact pipes. Increases in traffic load from 0.5 to 1.0 MPa and pipe diameters from 400 to 600 mm significantly amplify the hoop bending moments at both the bell and spigot joints. In contrast, greater soil cover depth and elevated groundwater levels substantially mitigate these moments. Disjoint length has a nonlinear influence, with bell moment peaking and then declining, while the spigot moment continues to rise, reaching a 135 % increase.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"170 ","pages":"Article 107414"},"PeriodicalIF":7.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145840520","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

Blast wave propagation and overpressure prediction in a tunnel with one closed end 单端封闭隧道中冲击波传播及超压预测

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

Tunnelling and Underground Space Technology

Pub Date : 2026-04-01 Epub Date: 2025-12-10 DOI: 10.1016/j.tust.2025.107370

Jiaqi Li , Yuxuan Wang , Jie Huang , Bowen Du , Zhouhong Zong , Minghong Li

Internal explosions in tunnels can cause severe casualties and structural damage, with end closures significantly amplifying shock wave effects. To investigate the influence of end closure on shock wave propagation, two large-scale internal explosion tests were conducted, and a validated finite element model was established for both open-ended and one-end closed tunnel conditions. The model was then employed to analyze the effects of end-face failure time, charge position, and explosive mass. The results indicate that reflected waves from the closed end produce a distinct secondary overpressure peak, which increases as the measurement point approaches the closed end. A demarcation point was identified that separates regions dominated by either the first or end-reflected peak overpressure. Both peak overpressures are primarily influenced by explosive mass, with location-induced average deviations of less than 8 %. While end-face failure time has a negligible influence on peak overpressures, it significantly affects pressure decay following reflection. Predictive formulas are proposed to estimate the first and end-reflected peak overpressures, as well as the demarcation point location, and have been rigorously validated with average errors below 7 %. This study provides a valuable reference for blast-resistant tunnel design.

隧道内部爆炸会造成严重的人员伤亡和结构破坏，隧道末端封闭会显著放大冲击波效应。为了研究端部闭合对激波传播的影响，进行了两次大型内爆试验，并建立了开放式和一端闭合隧洞条件下的有限元模型。利用该模型分析了端面失效时间、装药位置和炸药质量对爆炸的影响。结果表明：封闭端反射波产生明显的二次超压峰，随着测点靠近封闭端，二次超压峰增大；确定了一个分界点，将第一或末反射峰值超压占主导地位的区域分开。两个峰值超压主要受爆炸质量的影响，位置引起的平均偏差小于8%。端面破坏时间对峰值超压的影响可以忽略不计，但对反射后的压力衰减有显著影响。提出了估算第一次和最后反射峰值超压以及分界点位置的预测公式，并进行了严格的验证，平均误差小于7%。该研究为抗爆隧洞的设计提供了有价值的参考。

{"title":"Blast wave propagation and overpressure prediction in a tunnel with one closed end","authors":"Jiaqi Li , Yuxuan Wang , Jie Huang , Bowen Du , Zhouhong Zong , Minghong Li","doi":"10.1016/j.tust.2025.107370","DOIUrl":"10.1016/j.tust.2025.107370","url":null,"abstract":"<div><div>Internal explosions in tunnels can cause severe casualties and structural damage, with end closures significantly amplifying shock wave effects. To investigate the influence of end closure on shock wave propagation, two large-scale internal explosion tests were conducted, and a validated finite element model was established for both open-ended and one-end closed tunnel conditions. The model was then employed to analyze the effects of end-face failure time, charge position, and explosive mass. The results indicate that reflected waves from the closed end produce a distinct secondary overpressure peak, which increases as the measurement point approaches the closed end. A demarcation point was identified that separates regions dominated by either the first or end-reflected peak overpressure. Both peak overpressures are primarily influenced by explosive mass, with location-induced average deviations of less than 8 %. While end-face failure time has a negligible influence on peak overpressures, it significantly affects pressure decay following reflection. Predictive formulas are proposed to estimate the first and end-reflected peak overpressures, as well as the demarcation point location, and have been rigorously validated with average errors below 7 %. This study provides a valuable reference for blast-resistant tunnel design.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"170 ","pages":"Article 107370"},"PeriodicalIF":7.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145738097","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

The dynamic combustion process and smoke transport of tunnel spill fire under longitudinal ventilation: the evolution of vortex structures 纵向通风条件下隧道泄漏火灾的动态燃烧过程及烟气输运：涡结构的演变

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

Tunnelling and Underground Space Technology

Pub Date : 2026-04-01 Epub Date: 2025-12-13 DOI: 10.1016/j.tust.2025.107369

Chenghao Ye, Jiale Li, Jiaqi Bao, Xuejing Hu, Peihong Zhang

Research on vortex motion enhances the understanding of combustion dynamics and smoke transport patterns in tunnel spill fires under forced ventilation. This study combines model experiment and numerical simulations to examine the fuel layer diffusion process, fire plume characteristics, and smoke transportation of spill fires under longitudinal ventilation. Under forced convection, the temperature distribution on the bottom plate surface is divided into three regions: sub-boiling, boiling, and super-boiling. As longitudinal ventilation velocity increases, the leeward side diffusion length of the sub-boiling zone expands, allowing cold fuel to spread farther. The fuel diffusion pattern shifts from circular to teardrop-shaped, while cylindrical flow around the flame. Asymmetric fluid rotation compresses the leeward flame width, significantly enhancing vorticity in the wake region. Longitudinal ventilation extends the fire plume length but reduces the number of adherent and deflected vortices. It promotes the breakup of large vortex structures, increases small-scale vortices, disrupts continuous heat transfer paths, expands the contact area between hot fluid and cold air, and diminishes buoyant plume strength. Consequently, the fire plume behavior becomes increasingly governed by horizontal inertial forces. Strong airflow dilutes ceiling smoke temperature, reducing the upstream spread speed and distance of hot smoke. This alters airflow circulation, weakens cold-hot mixing, straightens streamlines, and narrows the ceiling temperature rise zone. In the windless environment, vorticity decays along the ceiling toward both sides. Under the weak ventilation, buoyant plumes compete with forced convection, expanding the vorticity distribution, induced flow creates a zero-vorticity zone downstream. At higher ventilation velocity, forced convection dominates, reducing the back-layering length nearly to zero, eliminating upstream vortices, concentrating vorticity downstream, and causing the zero-vorticity zone to disappear.

涡流运动的研究提高了对强制通风条件下隧道泄漏火灾燃烧动力学和烟气输运规律的认识。本文采用模型实验和数值模拟相结合的方法，研究了纵向通风条件下溢油火灾的燃料层扩散过程、火焰羽流特性和烟气输送。在强制对流下，底板表面的温度分布分为亚沸腾、沸腾和超沸腾三个区域。随着纵向通风速度的增加，亚沸腾区背风侧扩散长度扩大，使冷燃料扩散更远。燃料的扩散模式由圆形转变为泪滴状，而火焰周围的圆柱形流动。非对称流体旋转压缩了下风火焰宽度，显著增强了尾迹区域的涡度。纵向通风延长了火羽长度，但减少了附着和偏转漩涡的数量。它促进了大型涡旋结构的破裂，增加了小型涡旋，破坏了连续的传热路径，扩大了热流体和冷空气之间的接触面积，并降低了浮力羽流强度。因此，火羽的行为越来越受水平惯性力的支配。强气流稀释吊顶烟温，减少热烟上游传播速度和传播距离。这改变了气流循环，减弱了冷热混合，拉直了流线，缩小了天花板的温升区域。在无风环境中，涡度沿天花板向两侧衰减。弱通风条件下，浮力羽流与强迫对流竞争，扩大了涡度分布，诱导流在下游形成零涡度区。在较高的通气速度下，强迫对流占主导地位，使后层长度几乎为零，上游涡消除，下游涡度集中，零涡度区消失。

{"title":"The dynamic combustion process and smoke transport of tunnel spill fire under longitudinal ventilation: the evolution of vortex structures","authors":"Chenghao Ye, Jiale Li, Jiaqi Bao, Xuejing Hu, Peihong Zhang","doi":"10.1016/j.tust.2025.107369","DOIUrl":"10.1016/j.tust.2025.107369","url":null,"abstract":"<div><div>Research on vortex motion enhances the understanding of combustion dynamics and smoke transport patterns in tunnel spill fires under forced ventilation. This study combines model experiment and numerical simulations to examine the fuel layer diffusion process, fire plume characteristics, and smoke transportation of spill fires under longitudinal ventilation. Under forced convection, the temperature distribution on the bottom plate surface is divided into three regions: sub-boiling, boiling, and super-boiling. As longitudinal ventilation velocity increases, the leeward side diffusion length of the sub-boiling zone expands, allowing cold fuel to spread farther. The fuel diffusion pattern shifts from circular to teardrop-shaped, while cylindrical flow around the flame. Asymmetric fluid rotation compresses the leeward flame width, significantly enhancing vorticity in the wake region. Longitudinal ventilation extends the fire plume length but reduces the number of adherent and deflected vortices. It promotes the breakup of large vortex structures, increases small-scale vortices, disrupts continuous heat transfer paths, expands the contact area between hot fluid and cold air, and diminishes buoyant plume strength. Consequently, the fire plume behavior becomes increasingly governed by horizontal inertial forces. Strong airflow dilutes ceiling smoke temperature, reducing the upstream spread speed and distance of hot smoke. This alters airflow circulation, weakens cold-hot mixing, straightens streamlines, and narrows the ceiling temperature rise zone. In the windless environment, vorticity decays along the ceiling toward both sides. Under the weak ventilation, buoyant plumes compete with forced convection, expanding the vorticity distribution, induced flow creates a zero-vorticity zone downstream. At higher ventilation velocity, forced convection dominates, reducing the back-layering length nearly to zero, eliminating upstream vortices, concentrating vorticity downstream, and causing the zero-vorticity zone to disappear.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"170 ","pages":"Article 107369"},"PeriodicalIF":7.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145732313","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

Prediction of mud cake formation on shield cutterheads based on multi-source monitoring data integrated with deep learning method 基于多源监测数据与深度学习相结合的盾构刀盘泥饼地层预测

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

Tunnelling and Underground Space Technology

Pub Date : 2026-04-01 Epub Date: 2025-12-11 DOI: 10.1016/j.tust.2025.107339

Wengang Zhang , Han Han , Weixin Sun , Zhihao Wu , Yang Yang , Yumiao Yan

The formation of mud cake on the cutterhead during shield tunneling is a critical issue that directly affects construction efficiency and operational safety. This phenomenon is governed by a combination of geological conditions and excavation parameters. Traditional approaches typically rely on single-point monitoring data or empirical judgments, which are inadequate for achieving dynamic and accurate prediction of mud cake formation. To address this challenge, this study uses a section of the Shenzhen–Shantou Longgang shield tunnel project as a case study and proposes an integrated approach that combines a Transformer–LSTM deep learning model with real-time shield monitoring and advanced geological prediction. Specifically, real-time excavation parameters collected by the shield monitoring system were combined with geological information obtained from advanced geological prediction to construct a comprehensive dataset containing 41 shield operation parameters and 4 geological parameters. Using the Transformer-LSTM model, the cutterhead mud cake rate was dynamically predicted. The results demonstrate that this approach effectively leverages the complementary strengths of geological forecasting and excavation data, achieving high predictive performance with a coefficient of determination (

R^{2}

) of 0.986. The proposed method offers a valuable reference for the risk assessment and control of mud cake formation during shield tunneling.

盾构施工中刀盘泥饼的形成是直接影响施工效率和作业安全的关键问题。这种现象是由地质条件和开挖参数共同决定的。传统的方法通常依赖于单点监测数据或经验判断，这不足以实现对泥饼地层的动态和准确预测。为了应对这一挑战，本研究以深圳-汕头龙岗盾构隧道项目的一段为例，提出了一种将Transformer-LSTM深度学习模型与盾构实时监测和先进地质预测相结合的综合方法。具体而言，将盾构监测系统实时采集的开挖参数与超前地质预测获得的地质信息相结合，构建了包含41个盾构运行参数和4个地质参数的综合数据集。利用Transformer-LSTM模型，对刀盘泥饼速率进行了动态预测。结果表明，该方法有效地利用了地质预测与开挖数据的互补优势，预测效果良好，决定系数（R2）为0.986。该方法为盾构施工中泥饼形成的风险评估与控制提供了有价值的参考。

{"title":"Prediction of mud cake formation on shield cutterheads based on multi-source monitoring data integrated with deep learning method","authors":"Wengang Zhang , Han Han , Weixin Sun , Zhihao Wu , Yang Yang , Yumiao Yan","doi":"10.1016/j.tust.2025.107339","DOIUrl":"10.1016/j.tust.2025.107339","url":null,"abstract":"<div><div>The formation of mud cake on the cutterhead during shield tunneling is a critical issue that directly affects construction efficiency and operational safety. This phenomenon is governed by a combination of geological conditions and excavation parameters. Traditional approaches typically rely on single-point monitoring data or empirical judgments, which are inadequate for achieving dynamic and accurate prediction of mud cake formation. To address this challenge, this study uses a section of the Shenzhen–Shantou Longgang shield tunnel project as a case study and proposes an integrated approach that combines a Transformer–LSTM deep learning model with real-time shield monitoring and advanced geological prediction. Specifically, real-time excavation parameters collected by the shield monitoring system were combined with geological information obtained from advanced geological prediction to construct a comprehensive dataset containing 41 shield operation parameters and 4 geological parameters. Using the Transformer-LSTM model, the cutterhead mud cake rate was dynamically predicted. The results demonstrate that this approach effectively leverages the complementary strengths of geological forecasting and excavation data, achieving high predictive performance with a coefficient of determination (<span><math><mrow><msup><mrow><mi>R</mi></mrow><mn>2</mn></msup></mrow></math></span>) of 0.986. The proposed method offers a valuable reference for the risk assessment and control of mud cake formation during shield tunneling.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"170 ","pages":"Article 107339"},"PeriodicalIF":7.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145731755","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

Seismic performance of double-layer tunnel linings: a multi-performance-level framework 双层隧道衬砌抗震性能：多性能层次框架

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

Tunnelling and Underground Space Technology

Pub Date : 2026-04-01 Epub Date: 2025-12-21 DOI: 10.1016/j.tust.2025.107394

Bahram Salehi , Aliakbar Golshani , Jamal Rostami , Barbara Schneider-Muntau

This study presents a comprehensive investigation into the seismic behavior of a double-layer tunnel lining system, focusing on damage progression, failure mechanisms, and load transfer under varying seismic intensities. Using finite element modeling and theoretical formulations, the response of both primary and secondary linings was analyzed in terms of stiffness degradation, plastic hinge formation, crack propagation, dominant frequency shifts, and interface slip behavior. The findings reveal a progression of failure beginning with localized cracking and bending in the primary lining, followed by stiffness degradation and load redistribution to the secondary lining. Three performance levels including Primary Performance Level, Second Performance Level, and Critical Performance Limit, were identified. Interface slip conditions fully bonded, partially bonded, and fully debonded, were shown to significantly affect load transfer efficiency and structural integrity. Full-slip conditions reduce internal forces but increase displacement demands, while rigid connections concentrate stress but enhance structural capacity.

本研究对双层隧道衬砌系统的地震行为进行了全面调查，重点研究了不同地震烈度下的损伤进展、破坏机制和荷载传递。利用有限元模型和理论公式，从刚度退化、塑性铰形成、裂纹扩展、主频移和界面滑移行为等方面分析了主衬和次衬的响应。研究结果揭示了破坏的进程，从初级衬砌的局部开裂和弯曲开始，随后是刚度退化和负载重新分配到次级衬砌。确定了三个性能级别，包括主要性能级别，第二性能级别和关键性能限制。完全粘结、部分粘结和完全脱粘的界面滑移条件对载荷传递效率和结构完整性有显著影响。全滑移条件降低内力，但增加位移需求，而刚性连接集中应力，但提高结构承载力。

{"title":"Seismic performance of double-layer tunnel linings: a multi-performance-level framework","authors":"Bahram Salehi , Aliakbar Golshani , Jamal Rostami , Barbara Schneider-Muntau","doi":"10.1016/j.tust.2025.107394","DOIUrl":"10.1016/j.tust.2025.107394","url":null,"abstract":"<div><div>This study presents a comprehensive investigation into the seismic behavior of a double-layer tunnel lining system, focusing on damage progression, failure mechanisms, and load transfer under varying seismic intensities. Using finite element modeling and theoretical formulations, the response of both primary and secondary linings was analyzed in terms of stiffness degradation, plastic hinge formation, crack propagation, dominant frequency shifts, and interface slip behavior. The findings reveal a progression of failure beginning with localized cracking and bending in the primary lining, followed by stiffness degradation and load redistribution to the secondary lining. Three performance levels including Primary Performance Level, Second Performance Level, and Critical Performance Limit, were identified. Interface slip conditions fully bonded, partially bonded, and fully debonded, were shown to significantly affect load transfer efficiency and structural integrity. Full-slip conditions reduce internal forces but increase displacement demands, while rigid connections concentrate stress but enhance structural capacity.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"170 ","pages":"Article 107394"},"PeriodicalIF":7.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145814020","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

Metaconcrete-filled steel tubular column for rail-induced vibration mitigation in tunnels 钢管混凝土柱在隧道轨道振动抑制中的应用

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

Tunnelling and Underground Space Technology

Pub Date : 2026-04-01 Epub Date: 2025-12-02 DOI: 10.1016/j.tust.2025.107336

Ruishan Cheng , Wensu Chen , Cheng Xu , Hong Hao

Ground-borne vibration induced by subway trains in urban areas has caused disturbance to inhabitants along subway lines. Its effective reduction, therefore, has become increasingly important and has attracted more and more attention. Metamaterial/metastructure-based approaches with excellent vibration attenuation capabilities have been recently proposed to mitigate train-induced vibrations around rail tracks. However, owing to the intrinsic difficulties of conventional metastructure designs, effectively mitigating the low-frequency components of train-induced vibrations by installing metastructures around train tracks remains a great challenge. In this study, an innovative design with metaconcrete-filled steel tubular column (MFSTC) is proposed to replace conventional concrete subgrades under rail tracks. The performance of the MFSTC in reducing low-frequency vibrations is first investigated analytically and numerically. It is found that the reduction of the low-frequency vibrations starting near 0 Hz is achievable with proper design of the bottom support of the MFSTC and the shear resistance between the concrete matrix and steel tube of the MFSTC. In addition, the effects of bottom support stiffness and MFSTC configurations on the MFSTC’s vibration reduction capacities are examined. The results show that high shear stiffness between the steel tube and concrete matrix and strong bottom support to the outer steel tube can effectively suppress low-frequency vibrations. A detailed design strategy of the MFSTC aimed at attenuating train vibrations is proposed, and its capability is demonstrated in a case study.

城市地铁列车引起的地面振动对地铁沿线居民造成了干扰。因此，有效地减少碳排放变得越来越重要，并受到越来越多的关注。最近，人们提出了基于超材料/元结构的方法，这些方法具有出色的减振能力，可以减轻铁路轨道周围由火车引起的振动。然而，由于传统的元结构设计固有的困难，通过在火车轨道周围安装元结构来有效地减轻火车引起的低频振动仍然是一个很大的挑战。本文提出了一种以钢管混凝土柱（MFSTC）替代传统铁路下混凝土路基的创新设计。本文首先对MFSTC对低频振动的抑制性能进行了分析和数值研究。研究发现，通过合理设计MFSTC的底部支撑和混凝土基体与钢管之间的抗剪能力，可以实现从0 Hz附近开始的低频振动的减小。此外，还研究了底部支撑刚度和MFSTC构型对MFSTC减振能力的影响。结果表明，钢管与混凝土基体之间的高剪切刚度和对外钢管的强底支撑可以有效地抑制低频振动。提出了一种以列车振动衰减为目标的MFSTC的详细设计策略，并通过实例验证了其性能。

{"title":"Metaconcrete-filled steel tubular column for rail-induced vibration mitigation in tunnels","authors":"Ruishan Cheng , Wensu Chen , Cheng Xu , Hong Hao","doi":"10.1016/j.tust.2025.107336","DOIUrl":"10.1016/j.tust.2025.107336","url":null,"abstract":"<div><div>Ground-borne vibration induced by subway trains in urban areas has caused disturbance to inhabitants along subway lines. Its effective reduction, therefore, has become increasingly important and has attracted more and more attention. Metamaterial/metastructure-based approaches with excellent vibration attenuation capabilities have been recently proposed to mitigate train-induced vibrations around rail tracks. However, owing to the intrinsic difficulties of conventional metastructure designs, effectively mitigating the low-frequency components of train-induced vibrations by installing metastructures around train tracks remains a great challenge. In this study, an innovative design with metaconcrete-filled steel tubular column (MFSTC) is proposed to replace conventional concrete subgrades under rail tracks. The performance of the MFSTC in reducing low-frequency vibrations is first investigated analytically and numerically. It is found that the reduction of the low-frequency vibrations starting near 0 Hz is achievable with proper design of the bottom support of the MFSTC and the shear resistance between the concrete matrix and steel tube of the MFSTC. In addition, the effects of bottom support stiffness and MFSTC configurations on the MFSTC’s vibration reduction capacities are examined. The results show that high shear stiffness between the steel tube and concrete matrix and strong bottom support to the outer steel tube can effectively suppress low-frequency vibrations. A detailed design strategy of the MFSTC aimed at attenuating train vibrations is proposed, and its capability is demonstrated in a case study.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"170 ","pages":"Article 107336"},"PeriodicalIF":7.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145651901","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

A computational framework for dynamic quantitative assessment of surrounding rock damage based on failure approaching index in underground construction 基于破坏逼近指标的地下工程围岩损伤动态定量评价计算框架

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

Tunnelling and Underground Space Technology

Pub Date : 2026-04-01 Epub Date: 2025-12-18 DOI: 10.1016/j.tust.2025.107377

Yuxuan Wang , Shengrong Xie , Yiyi Wu , Chenyang Liu , Jiaqi Hou

Aiming at the problem that superimposed surrounding rock stress during ultra-large mining height working face (ULMHWF) passing through the abandoned roadway (AR) is prone to inducing intense dynamic disasters, and existing evaluation methods fail to achieve full-process dynamic quantification of damage, this study constructed a dynamic evaluation system for surrounding rock damage based on the failure approaching index (FAI), whose accuracy was verified through experiments, numerical simulations, and on-site engineering applications. Uniaxial compression test results indicate that microcracks in low-strength rock masses are more susceptible to activation and damage, forming multiple sets of macroscopic cracks with low energy release intensity. A 3D numerical model with rigorously calibrated constitutive parameters was established, and a FISH-language calculation module based on FAI was developed to unveil the time-varying evolution characteristics of the damage zone as the distance advances. Specifically, ULMHWF excavation induces a “>”-shaped stress peak zone ahead of the coal wall; during advancement from 50 m to 5 m, the FAI peak increases by 45.6 %, and its distribution characteristics are consistent with those of the plastic zone. In addition, visual characterization was realized via a MATLAB-based 3D reconstruction algorithm. On-site borehole observation results show that the failure depth predicted by FAI is highly consistent with the measured data. Based on this, multi-dimensional synergistic reinforcement support measures and a four-stage optimized technology for passing through the AR were proposed, achieving safe and efficient mining successfully. This study confirms the engineering application value of FAI, providing a more effective method for quantitative evaluation of surrounding rock damage in underground engineering.

针对超大采高工作面穿越废弃巷道时围岩应力叠加易诱发强烈动力灾害，现有评价方法无法实现损伤全过程动态量化的问题，构建了基于破坏逼近指数（FAI）的围岩损伤动态评价体系，并通过实验验证了其准确性。数值模拟和现场工程应用。单轴压缩试验结果表明，低强度岩体中的微裂纹更容易激活破坏，形成多组宏观裂纹，且能量释放强度较低。建立了严格标定本构参数的三维数值模型，开发了基于FAI的fish语言计算模块，揭示了损伤区域随距离的时变演化特征。具体而言，ULMHWF开挖在煤壁前方形成“>；”形应力峰值区；从50 m推进到5 m， FAI峰值增加45.6%，其分布特征与塑性区基本一致。此外，通过基于matlab的三维重建算法实现了视觉表征。现场钻孔观测结果表明，FAI预测的破坏深度与实测数据高度吻合。在此基础上，提出了多维协同加固支护措施和四阶段穿越AR优化技术，成功实现了安全高效开采。本研究证实了FAI的工程应用价值，为地下工程围岩损伤定量评价提供了一种更有效的方法。

{"title":"A computational framework for dynamic quantitative assessment of surrounding rock damage based on failure approaching index in underground construction","authors":"Yuxuan Wang , Shengrong Xie , Yiyi Wu , Chenyang Liu , Jiaqi Hou","doi":"10.1016/j.tust.2025.107377","DOIUrl":"10.1016/j.tust.2025.107377","url":null,"abstract":"<div><div>Aiming at the problem that superimposed surrounding rock stress during ultra-large mining height working face (ULMHWF) passing through the abandoned roadway (AR) is prone to inducing intense dynamic disasters, and existing evaluation methods fail to achieve full-process dynamic quantification of damage, this study constructed a dynamic evaluation system for surrounding rock damage based on the failure approaching index (<em>FAI</em>), whose accuracy was verified through experiments, numerical simulations, and on-site engineering applications. Uniaxial compression test results indicate that microcracks in low-strength rock masses are more susceptible to activation and damage, forming multiple sets of macroscopic cracks with low energy release intensity. A 3D numerical model with rigorously calibrated constitutive parameters was established, and a <em>FISH</em>-language calculation module based on <em>FAI</em> was developed to unveil the time-varying evolution characteristics of the damage zone as the distance advances. Specifically, ULMHWF excavation induces a “>”-shaped stress peak zone ahead of the coal wall; during advancement from 50 m to 5 m, the <em>FAI</em> peak increases by 45.6 %, and its distribution characteristics are consistent with those of the plastic zone. In addition, visual characterization was realized via a MATLAB-based 3D reconstruction algorithm. On-site borehole observation results show that the failure depth predicted by <em>FAI</em> is highly consistent with the measured data. Based on this, multi-dimensional synergistic reinforcement support measures and a four-stage optimized technology for passing through the AR were proposed, achieving safe and efficient mining successfully. This study confirms the engineering application value of <em>FAI</em>, providing a more effective method for quantitative evaluation of surrounding rock damage in underground engineering.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"170 ","pages":"Article 107377"},"PeriodicalIF":7.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145786033","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

Experimental investigation on permeability of sand-foam mixture under soil pressure in mechanized tunnelling 土压作用下机械隧道砂-泡沫混合物渗透性试验研究

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

Tunnelling and Underground Space Technology

Pub Date : 2026-04-01 Epub Date: 2025-12-17 DOI: 10.1016/j.tust.2025.107379

Zhiyao Feng , Shuying Wang , Yufeng Shi , Yalong Jiang , Xiangsheng Chen , Tongming Qu

The seepage behaviour of excavated sand becomes increasingly complex due to foam injection. In this investigation, the impact of soil pressure on the hydraulic conductivity of sand-foam mixtures is examined through a newly developed permeameter. The findings show that the hydraulic conductivity is conspicuously affected by the soil pressure, and this influence largely relies on the amount of foam bubbles. Specifically, the initial hydraulic conductivity undergoes a sharp decrease with increasing soil pressure, followed by a gradual decline until it reaches a stable phase, while the initial stabilization duration increases with soil pressure. The blocking capacity and stability of the water-blocking structure are notably enhanced under soil pressure due to soil skeleton compression. This implies that standard permeability tests may overstate the permeability of sand-foam mixtures owing to the omission of soil pressure, potentially causing overdosing of chemical additives. Moreover, an effective void ratio calculation model is proposed to quantitatively characterize the ability of foam bubbles to obstruct seepage channels. The mechanisms through which soil pressure affects the mixture’s seepage behaviour are also revealed by balloon compression tests.

由于泡沫的注入，开挖砂的渗流特性变得越来越复杂。在这项研究中，土压力对砂泡沫混合物的水力导电性的影响是通过一种新开发的渗透仪来研究的。研究结果表明：土压力对水导率的影响显著，而这种影响在很大程度上取决于泡沫泡的数量。其中，初始水力导率随着土压力的增加急剧下降，随后逐渐下降，直至达到稳定阶段，初始稳定持续时间随着土压力的增加而增加。在土压力作用下，由于土骨架的压缩作用，阻水结构的阻水能力和稳定性明显增强。这意味着，由于遗漏土壤压力，标准渗透性测试可能会夸大砂-泡沫混合物的渗透性，从而可能导致化学添加剂过量。此外，提出了一种有效的孔隙比计算模型，定量表征泡沫气泡阻塞渗流通道的能力。通过气球压缩试验揭示了土压力影响混合料渗流行为的机理。

{"title":"Experimental investigation on permeability of sand-foam mixture under soil pressure in mechanized tunnelling","authors":"Zhiyao Feng , Shuying Wang , Yufeng Shi , Yalong Jiang , Xiangsheng Chen , Tongming Qu","doi":"10.1016/j.tust.2025.107379","DOIUrl":"10.1016/j.tust.2025.107379","url":null,"abstract":"<div><div>The seepage behaviour of excavated sand becomes increasingly complex due to foam injection. In this investigation, the impact of soil pressure on the hydraulic conductivity of sand-foam mixtures is examined through a newly developed permeameter. The findings show that the hydraulic conductivity is conspicuously affected by the soil pressure, and this influence largely relies on the amount of foam bubbles. Specifically, the initial hydraulic conductivity undergoes a sharp decrease with increasing soil pressure, followed by a gradual decline until it reaches a stable phase, while the initial stabilization duration increases with soil pressure. The blocking capacity and stability of the water-blocking structure are notably enhanced under soil pressure due to soil skeleton compression. This implies that standard permeability tests may overstate the permeability of sand-foam mixtures owing to the omission of soil pressure, potentially causing overdosing of chemical additives. Moreover, an effective void ratio calculation model is proposed to quantitatively characterize the ability of foam bubbles to obstruct seepage channels. The mechanisms through which soil pressure affects the mixture’s seepage behaviour are also revealed by balloon compression tests.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"170 ","pages":"Article 107379"},"PeriodicalIF":7.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145791365","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

Experimental and numerical investigation of shield tunnel segments reinforced with grouted channel steel under diverse damage scenarios 不同损伤工况下灌浆槽钢加固盾构管片的试验与数值研究

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

Tunnelling and Underground Space Technology

Pub Date : 2026-04-01 Epub Date: 2025-12-02 DOI: 10.1016/j.tust.2025.107334

Xun Wu , Jun He , Kan Huang , Xiangsheng Chen , Sidong Feng , Bin Huang

As a key component of urban rail system, shield tunnels are susceptible to cracking and stiffness degradation, from which an urgent need for effective reinforcement arises. In this study, grouted channel steel (GCS) with bolted connections was assessed as a reinforcement strategy for damaged tunnel segments. Full-scale tests integrated with finite element simulations verified the reliability of the proposed modelling approach, as strong agreement was observed between simulated and experimental load–displacement responses and crack development. The deformation of reinforced segments proceeded through three stages: elastic, strengthening, and failure. The effectiveness of reinforcement was governed by the level of prior damage. Elastic stiffness declined progressively with increasing damage, whereas strengthening-stage stiffness remained stable. Stiffness enhancement was concentrated in the strengthening stage, reaching values up to sixteen times those of the elastic stage. Under service limit conditions, balanced stiffness improvements of 95–120 % were achieved across stages, and recovery after unloading reached 140–160 %. These results indicate that GCS reinforcement provides a robust means of restoring and extending the service life of shield tunnel segments in urban rail systems.

盾构隧道作为城市轨道交通的重要组成部分，易发生开裂和刚度退化，迫切需要进行有效的加固。在本研究中，采用螺栓连接的灌浆槽钢（GCS）作为受损隧道管段的加固策略进行了评估。与有限元模拟相结合的全尺寸测试验证了所提出的建模方法的可靠性，因为模拟和实验的载荷-位移响应和裂缝发展之间存在强烈的一致性。加固段的变形经历了弹性、强化和破坏三个阶段。加固的有效性取决于先前的损坏程度。随着损伤的增加，弹性刚度逐渐下降，而增强阶段刚度保持稳定。刚度增强主要集中在强化阶段，达到弹性阶段的16倍。在使用极限条件下，各阶段的平衡刚度提高了95 ~ 120%，卸载后的恢复达到了140 ~ 160%。这些结果表明，GCS加固为恢复和延长城市轨道系统盾构隧道管段的使用寿命提供了一种可靠的手段。

{"title":"Experimental and numerical investigation of shield tunnel segments reinforced with grouted channel steel under diverse damage scenarios","authors":"Xun Wu , Jun He , Kan Huang , Xiangsheng Chen , Sidong Feng , Bin Huang","doi":"10.1016/j.tust.2025.107334","DOIUrl":"10.1016/j.tust.2025.107334","url":null,"abstract":"<div><div>As a key component of urban rail system, shield tunnels are susceptible to cracking and stiffness degradation, from which an urgent need for effective reinforcement arises. In this study, grouted channel steel (GCS) with bolted connections was assessed as a reinforcement strategy for damaged tunnel segments. Full-scale tests integrated with finite element simulations verified the reliability of the proposed modelling approach, as strong agreement was observed between simulated and experimental load–displacement responses and crack development. The deformation of reinforced segments proceeded through three stages: elastic, strengthening, and failure. The effectiveness of reinforcement was governed by the level of prior damage. Elastic stiffness declined progressively with increasing damage, whereas strengthening-stage stiffness remained stable. Stiffness enhancement was concentrated in the strengthening stage, reaching values up to sixteen times those of the elastic stage. Under service limit conditions, balanced stiffness improvements of 95–120 % were achieved across stages, and recovery after unloading reached 140–160 %. These results indicate that GCS reinforcement provides a robust means of restoring and extending the service life of shield tunnel segments in urban rail systems.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"170 ","pages":"Article 107334"},"PeriodicalIF":7.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145651896","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

Uncertainty-aware geological prediction in TBM tunneling: A probabilistic bayesian framework with exploratory multi-source label construction 隧道掘进机掘进中不确定性感知地质预测：一个探索性多源标签构建的概率贝叶斯框架

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

Tunnelling and Underground Space Technology

Pub Date : 2026-04-01 Epub Date: 2026-01-02 DOI: 10.1016/j.tust.2025.107424

Jinghuan Pan, Hang Lin, Jinbiao Wu

Deep learning models for TBM geological prediction suffer from two critical limitations: they provide only single-point estimates, which are unreliable when encountering unknown conditions, and they struggle with the multi-source heterogeneity between continuous operational data and discrete geological information. To address these challenges, this study proposes an uncertainty quantification framework that integrates a Gaussian Mixture Model (GMM) with a Probabilistic Bayesian Convolutional Neural Network (PBCNN). First, the GMM clusters TBM operational parameters to establish a data-driven labeling system, effectively resolving the data heterogeneity. The optimal number of clusters is determined using internal evaluation metrics. Subsequently, a PBCNN architecture, tailored for tabular time-series data, is constructed to decompose the model’s predictive uncertainty into its epistemic and aleatoric components. The framework’s effectiveness was validated using field data from the Bainikeng Station section of the Shenzhen-Dayawan Intercity Railway project. Four typical operational scenarios were designed—Unknown Geological Conditions, Changing Operational Status, Data Proportion Fluctuation, and Different Noise Environments—for systematic testing. The results demonstrate that our method not only achieves high predictive accuracy but also provides a quantitative assessment of prediction credibility and risk. This establishes a more robust and generalizable paradigm for geological identification and intelligent decision-making in TBM construction.

用于TBM地质预测的深度学习模型有两个关键的局限性：它们只能提供单点估计，在遇到未知条件时不可靠；它们难以处理连续操作数据和离散地质信息之间的多源异质性。为了解决这些挑战，本研究提出了一个不确定性量化框架，该框架将高斯混合模型（GMM）与概率贝叶斯卷积神经网络（PBCNN）相结合。首先，将GMM聚类TBM运行参数，建立数据驱动的标注系统，有效解决数据异质性问题。使用内部评估指标确定集群的最佳数量。随后，构建了针对表格时间序列数据定制的PBCNN架构，将模型的预测不确定性分解为其认知和任意组件。通过深圳—大亚湾城际铁路白坑站段的现场数据验证了该框架的有效性。设计了未知地质条件、运行状态变化、数据比例波动和不同噪声环境4种典型运行场景进行系统测试。结果表明，该方法不仅具有较高的预测精度，而且能够对预测可信度和风险进行定量评估。这为隧道掘进机施工中的地质识别和智能决策建立了一个更加稳健和可推广的范例。

{"title":"Uncertainty-aware geological prediction in TBM tunneling: A probabilistic bayesian framework with exploratory multi-source label construction","authors":"Jinghuan Pan, Hang Lin, Jinbiao Wu","doi":"10.1016/j.tust.2025.107424","DOIUrl":"10.1016/j.tust.2025.107424","url":null,"abstract":"<div><div>Deep learning models for TBM geological prediction suffer from two critical limitations: they provide only single-point estimates, which are unreliable when encountering unknown conditions, and they struggle with the multi-source heterogeneity between continuous operational data and discrete geological information. To address these challenges, this study proposes an uncertainty quantification framework that integrates a Gaussian Mixture Model (GMM) with a Probabilistic Bayesian Convolutional Neural Network (PBCNN). First, the GMM clusters TBM operational parameters to establish a data-driven labeling system, effectively resolving the data heterogeneity. The optimal number of clusters is determined using internal evaluation metrics. Subsequently, a PBCNN architecture, tailored for tabular time-series data, is constructed to decompose the model’s predictive uncertainty into its epistemic and aleatoric components. The framework’s effectiveness was validated using field data from the Bainikeng Station section of the Shenzhen-Dayawan Intercity Railway project. Four typical operational scenarios were designed—Unknown Geological Conditions, Changing Operational Status, Data Proportion Fluctuation, and Different Noise Environments—for systematic testing. The results demonstrate that our method not only achieves high predictive accuracy but also provides a quantitative assessment of prediction credibility and risk. This establishes a more robust and generalizable paradigm for geological identification and intelligent decision-making in TBM construction.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"170 ","pages":"Article 107424"},"PeriodicalIF":7.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884067","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