Underground Space最新文献_第10页

Automated design framework for excavation retaining structures: Extending IFC standards and integrating BIM with geotechnical simulation 开挖挡土结构的自动化设计框架：扩展IFC标准并将BIM与岩土模拟集成

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-07-24 DOI: 10.1016/j.undsp.2025.04.007

Qiwei Wan, Yuyuan Zhu, Haibin Ding, Wentao Hu, Changjie Xu

Challenges arise in automate design with building information modeling (BIM) in underground space. Industry foundation classes (IFC) standard lacks detailed entity objects for describing excavation retaining structures and geological information, and automated design based on BIM models is not yet for practical application. This study presents a novel automated framework. It integrates the extended IFC standard with mechanical analysis and BIM modeling, significantly advancing structural optimization and rebar detailing. Direct 3D model generation streamlines complex excavation projects, aligning with the trend towards automated, precision-driven design. Key contributions include: (1) the extension of the IFC standard to support excavation retaining structures with objects like IfcBracedPit and IfcPitWall, improving interoperability between geotechnical models and BIM systems; (2) the integration of heuristic algorithms for automated optimization of deformation control parameters, reducing manual intervention; and (3) the promotion of design methodology that bypasses two-dimensional modeling and directly generates three-dimensional models, enhancing efficiency and allowing engineers to focus on high-level decision-making. However, the framework is primarily suited for standard cross-section projects like subway stations and tunnels. Future work will focus on refining the framework for more complex geotechnical projects, addressing software independence and improving design robustness and independence.

建筑信息模型（BIM）在地下空间自动化设计中的应用提出了新的挑战。行业基础类（IFC）标准缺乏详细的实体对象来描述开挖支护结构和地质信息，基于BIM模型的自动化设计尚未得到实际应用。本研究提出了一种新的自动化框架。它将扩展的IFC标准与力学分析和BIM建模相结合，显著推进了结构优化和钢筋细节设计。直接的3D模型生成简化了复杂的挖掘项目，符合自动化，精确驱动设计的趋势。主要贡献包括：(1)扩展了IFC标准，以支持使用IfcBracedPit和IfcPitWall等对象的开挖挡土结构，提高了岩土模型和BIM系统之间的互操作性；(2)集成启发式算法实现变形控制参数的自动优化，减少人工干预；(3)推广绕过二维建模直接生成三维模型的设计方法，提高效率，使工程师能够专注于高层决策。然而，该框架主要适用于标准截面工程，如地铁站和隧道。未来的工作将侧重于为更复杂的岩土工程项目改进框架，解决软件独立性问题，提高设计的稳健性和独立性。

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引用次数: 0

Experimental study on ECC-based unreinforced shield tunnel segmental joints for future resilient infrastructure 面向未来弹性基础设施的无加固盾构隧道管片节理试验研究

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-07-23 DOI: 10.1016/j.undsp.2024.09.009

Minjin Cai , Timon Rabczuk , Xiaoying Zhuang

To advance resilient infrastructure, this study explores unreinforced shield tunnel segment technologies, a critical but under-researched area. It conducted experiments on ECC-based unreinforced segments (ECCUS), comparing them with ECC-based reinforced segments (ECCRS) and reinforced concrete segments (RCS), focusing on their mechanical properties, including material characteristics, segmental deflection, joint behavior, bolt strain, damage propagation, failure modes, joint toughness, and ductility. Key findings include: (1) ECCUS joints exhibited significantly enhanced bearing capacity, with ultimate strength 34% higher than RCS and 29% higher than ECCRS. In terms of initial cracking strength, ECCUS outperformed RCS by 200% and ECCRS by 34%. (2) The absence of reinforcement cages in ECCUS reduced stiffness but improved overall segment coordination and deformation, leading to deflections 100% greater than RCS and 85% than ECCRS. (3) ECCUS and ECCRS displayed numerous, fine cracks under 200 µm wide, while RCS showed fewer, wider cracks over 3 mm, leading to significant spalling. Cracks in ECCUS were densely distributed across shear and compression zones, in contrast to RCS and ECCRS where they concentrated on compression areas. (4) ECCUS joints exhibited remarkable toughness, with elastic phase toughness 13.47 times that of RCS and 1.91 times that of ECCRS. In the normal serviceability phase, the toughness of ECCUS was 12.17 times that of RCS and 2.53 times that of ECCRS. (5) Considering multi-scale mechanical effects, ECCUS joints amplified the material advantages of ECC over RC more than 11 times during the elastic stage. These findings offer valuable insights for future resilient infrastructure development based on unreinforced construction technologies.

为了推进弹性基础设施，本研究探索了非加固盾构隧道管段技术，这是一个关键但研究不足的领域。对ecc基无筋段（ECCUS）进行了试验，将其与ecc基有筋段（ECCRS）和钢筋混凝土段（RCS）进行了比较，重点研究了其力学性能，包括材料特性、节段挠度、节点行为、螺栓应变、损伤扩展、破坏模式、节点韧性和延性。主要研究结果包括：(1)ECCUS节点承载力显著增强，其极限强度比RCS高34%，比ECCRS高29%；在初始开裂强度方面，ECCUS比RCS高200%，ECCRS高34%。(2) ECCUS中没有钢筋笼降低了刚度，但改善了整体节段协调和变形，导致挠度比RCS大100%，比ECCRS大85%。(3) ECCUS和ECCRS在200µm以下出现了大量细小的裂缝，而RCS在3 mm以上出现了较少、较宽的裂缝，导致明显的剥落。ECCUS的裂缝集中分布在剪切区和压缩区，而RCS和ECCRS的裂缝集中在压缩区。(4) ECCUS接头韧性显著，其弹性相韧性是RCS的13.47倍，ECCRS的1.91倍。在正常使用阶段，ECCUS的韧性是RCS的12.17倍，ECCRS的2.53倍。(5)考虑多尺度力学效应，ECCUS节点在弹性阶段将ECC的材料优势放大了11倍以上。这些发现为未来基于非加固建筑技术的弹性基础设施发展提供了有价值的见解。

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引用次数: 0

Benchmark study of three statistical methods for six intact rock failure criteria constrained by different rock strength data 不同岩石强度数据约束下六种完整岩石破坏准则三种统计方法的基准研究

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-07-23 DOI: 10.1016/j.undsp.2025.04.006

Peng-fei He , Xin Li , Xu-long Yao , Zhi-gang Tao , Yan-ting Du

To reduce the impact of potential strength outliers on parameter estimation, statistical methods based on the least median square and least absolute deviation have been proposed as alternatives to the traditional least square method. However, little research has been conducted to compare the performance of these different statistical methods. This study introduces a novel procedure for evaluating the three statistical approaches across six selected rock failure criteria, constrained by various rock strength datasets. The consistency of the best-fitting failure criterion and the robustness of the strength parameter estimations serve as the primary benchmarks for evaluation. Based on the benchmark analysis, the following conclusions are drawn. First, both the least square and least absolute deviation methods perform equivalently in identifying the best-fitting failure criterion for a given rock strength dataset, whereas the least median square method does not. Second, when estimating the strength parameters in a two-dimensional failure criterion with the conventional test data of low complexity, the least absolute deviation method is recommended for obtaining robust parameter estimations. Third, as the complexity of conventional test data increases or when true triaxial test data are used to estimate strength parameters for a three-dimensional failure criterion, it is essential to evaluate the outlier-proneness by analyzing the prediction error. If the kurtosis of the prediction error is less than 3, the least square method is preferred. Otherwise, the least absolute deviation method should be used to mitigate the influence of potential strength outliers. This benchmark study offers valuable insights for the future application of different statistical methods in rock mechanics.

为了减少潜在强度异常值对参数估计的影响，提出了基于最小中位数平方和最小绝对偏差的统计方法来替代传统的最小二乘法。然而，很少有研究对这些不同统计方法的性能进行比较。本研究介绍了一种新的程序，用于评估六个选定岩石破坏标准的三种统计方法，受各种岩石强度数据集的约束。最佳拟合破坏准则的一致性和强度参数估计的鲁棒性是评价的主要标准。基于基准分析，得出以下结论。首先，最小二乘法和最小绝对偏差法在确定给定岩石强度数据集的最佳拟合破坏准则方面表现相当，而最小中位数二乘法则不然。其次，在使用复杂度较低的常规试验数据进行二维破坏准则强度参数估计时，建议采用最小绝对偏差法获得鲁棒参数估计。第三，随着常规试验数据复杂性的增加或使用真三轴试验数据估计三维破坏准则的强度参数时，通过分析预测误差来评估异常值倾向是必要的。如果预测误差的峰度小于3，则首选最小二乘法。否则，应采用最小绝对偏差法来减轻潜在强度异常值的影响。这一基准研究为未来不同统计方法在岩石力学中的应用提供了有价值的见解。

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引用次数: 0

A lifecycle carbon emission evaluation model for urban underground highway tunnel facilities 城市地下公路隧道设施全生命周期碳排放评价模型

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-07-18 DOI: 10.1016/j.undsp.2025.04.005

Guosheng Wang , Dechun Lu , Gangao Ji , Xuhua Liang , Qingtao Lin , Jirui Lv , Xiuli Du

Anthropogenic greenhouse gas emissions stand as the primary catalyst of climate perturbations. A precise evaluation of these emissions holds paramount importance in realizing energy conservation and emission reduction goals. Urban underground highway tunnel facilities emerge as a promising recourse for ameliorating traffic congestion and advancing energy conservation and emission mitigation endeavours. Nonetheless, the methodologies for quantifying its carbon emissions remain scant. This study ventures into the realm of carbon footprint appraisal within the lifecycle paradigm of underground highway tunnel facilities. Tailored to the characteristics, functionalities, and design intricacies of urban underground highway tunnel facilities, the physical boundaries and scopes are meticulously calibrated. Subsequently, a carbon emission computational model adept at encapsulating the emission characteristics throughout the entire lifecycle is formulated. Meanwhile, a detailed database is established for emission factors of various carbon emission activities. Leveraging insights garnered from a specific project case, the overarching carbon emission profiles of the urban underground highway tunnel facility, both in aggregate and individual stages, are elucidated. Concomitantly, bespoke recommendations and strategies aimed at energy preservation and emission abatement are proffered, attuned to the idiosyncratic attributes of carbon emissions across distinct stages.

人为温室气体排放是气候扰动的主要催化剂。准确评估这些排放对实现节能减排目标至关重要。城市地下公路隧道设施成为缓解交通拥堵和推进节能减排工作的有希望的资源。尽管如此，量化其碳排放量的方法仍然很少。本研究探索地下公路隧道设施生命周期模式下的碳足迹评估领域。根据城市地下公路隧道设施的特点、功能和设计复杂性，对物理边界和范围进行了精心校准。随后，建立了一个能够封装整个生命周期碳排放特征的碳排放计算模型。同时，建立了各种碳排放活动的详细排放因子数据库。利用从具体项目案例中获得的见解，阐明了城市地下公路隧道设施在总体和单个阶段的总体碳排放概况。与此同时，针对不同阶段碳排放的特殊属性，提供了旨在节能和减排的定制建议和策略。

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引用次数: 0

Land-sea integrated suitability evaluation of underground space based on Pythagorean fuzzy Bayesian network 基于毕达哥拉斯模糊贝叶斯网络的地下空间陆海综合适宜性评价

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-07-16 DOI: 10.1016/j.undsp.2025.04.004

Xinyu Liu , Hongjun Liu , Jie Dong , Peng Yu , Honghua Liu , Guanghua Cheng

Scientific development and utilization of urban underground space is an inevitable choice for sustainable urban development. However, in the previous suitability evaluation of underground space in coastal cities, the development potential of underground space in the sea area is not considered. Therefore, this study takes the coastal zone of Jiaozhou bay as the study area, establishes evaluation index systems for land and sea areas separately, and explores a new model for evaluating the suitability of underground space in coastal cities by integrating land and sea. In addition, an underground space suitability evaluation model based on the integration of Pythagorean fuzzy sets and Bayesian network is proposed. Firstly, the Pythagorean triangular fuzzy numbers are used to expand the fuzzy range of expert opinions. Then the Pythagorean triangular fuzzy hybrid geometric operator is used to realize the aggregation of expert opinions to solve the difficulty of obtaining the node conditional probability table by the traditional Bayesian network model of underground space suitability evaluation. Finally, the Pythagorean fuzzy Bayesian network is used as an evaluation tool to carry out the underground space suitability evaluation. Based on the evaluation result and urban planning, the overall planning and functional zoning guidelines for underground space development in the study area are given and the suitability and engineering construction difficulty analysis on the second subsea tunnel of Jiaozhou bay is conducted. The research results can provide a valuable reference for the coastal city planning department to develop and utilize underground space.

科学开发利用城市地下空间是城市可持续发展的必然选择。然而，在以往的沿海城市地下空间适宜性评价中，并未考虑海区地下空间的开发潜力。因此，本研究以胶州湾海岸带为研究区，分别建立陆域和海域评价指标体系，探索陆海一体化评价沿海城市地下空间适宜性的新模式。此外，提出了一种基于毕达哥拉斯模糊集与贝叶斯网络相结合的地下空间适宜性评价模型。首先利用毕达哥拉斯三角模糊数扩大专家意见的模糊范围；然后利用毕达哥拉斯三角模糊混合几何算子实现专家意见的聚合，解决传统贝叶斯网络地下空间适宜性评价模型获取节点条件概率表的困难；最后，利用毕达哥拉斯模糊贝叶斯网络作为评价工具进行地下空间适宜性评价。根据评价结果和城市规划，给出了研究区地下空间开发总体规划和功能分区指南，并对胶州湾海底第二隧道的适宜性和工程施工难度进行了分析。研究结果可为滨海城市规划部门开发利用地下空间提供有价值的参考。

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引用次数: 0

Development of the Optuna-NGBoost-SHAP model for estimating ground settlement during tunnel excavation 隧道开挖过程中地面沉降估算的Optuna-NGBoost-SHAP模型的建立

IF 8.2 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-07-15 DOI: 10.1016/j.undsp.2025.03.006

Yuxin Chen , Mohammad Hossein Kadkhodaei , Jian Zhou

This study aims to develop and evaluate a natural gradient boosting (NGBoost) model optimized with Optuna for estimating ground settlement during tunnel excavation, incorporating Shapley additive explanations (SHAP) to perform interpretability analysis on the model’s estimation results. The model’s predictive performance was comprehensively assessed using datasets from two earth pressure balance shield tunneling projects in Changsha and Zhengzhou, China. Comparative analyses demonstrated the superior accuracy and generalization capability of the Optuna-NGBoost-SHAP model (training set: R² = 0.9984, MAE = 0.1004, RMSE = 0.4193, MedAE = 0.0122; validation set: R² = 0.9001, MAE = 1.3363, RMSE = 3.2992, MedAE = 0.3042; test set: R² = 0.9361, MAE = 0.9961, RMSE = 2.5388, MedAE = 0.2147). SHAP value analysis quantitatively evaluated the contributions of input features to the model’s estimations, identifying geometric factors (distance from the shield machine to the monitoring section and cover depth) as the most important features. The findings provide robust decision support for safety management during tunnel construction and demonstrate the reliability and efficiency of the Optuna-NGBoost-SHAP framework in estimating complex ground settlement scenarios.

本研究旨在开发和评估利用Optuna优化的自然梯度推进（NGBoost）模型估算隧道开挖过程中地面沉降，并结合Shapley加性解释（SHAP）对模型估算结果进行可解释性分析。利用长沙和郑州两个土压平衡盾构隧道工程的数据集，对该模型的预测性能进行了综合评估。对比分析表明，Optuna-NGBoost-SHAP模型具有较好的准确率和泛化能力(训练集：R2 = 0.9984, MAE = 0.1004, RMSE = 0.4193, MedAE = 0.0122；验证集：R2 = 0.9001, MAE = 1.3363, RMSE = 3.2992, MedAE = 0.3042；测试集:R2 = 0.9361,美= 0.9961,RMSE = 2.5388, MedAE = 0.2147)。SHAP值分析定量地评估了输入特征对模型估计的贡献，确定几何因素（从盾构机到监测段的距离和覆盖深度）是最重要的特征。研究结果为隧道施工期间的安全管理提供了强有力的决策支持，并证明了Optuna-NGBoost-SHAP框架在估算复杂地面沉降情景方面的可靠性和有效性。

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引用次数: 0

Data-driven modeling for evaluating deformation of a deep excavation near existing tunnels 现有隧道附近深基坑变形评估的数据驱动建模

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-07-14 DOI: 10.1016/j.undsp.2025.04.003

Fengwen Lai , Songyu Liu , Jim Shiau , Mingpeng Liu , Guojun Cai , Ming Huang

This study explores an integrated framework combining in-situ test-based numerical and data-driven modeling to assess the performance of a deep excavation-tunnel system. To achieve the goal, a case history of deep excavations adjacent to existing tunnels in silt/sand-dominated sediments is introduced to establish a base three-dimensional finite element (3D-FE) model. In-situ tests such as cone penetration test (CPT/CPTU) and seismic dilatometer test (DMT/SDMT), as an alternative to laboratory testing, are used to determine a set of advanced constitutive model parameters. The established excavation-tunnel numerical model is then validated against filed monitoring data. A dataset from numerical simulation is created for training and testing four machine learning models (i.e., artificial neural network (ANN), support vector machines (SVM), random forest (RF), and light gradient boosting machine (LightGBM)), which predict the maximum wall deflection, ground surface settlement, horizontal and vertical displacements of the tunnel. Results show that the ANN model outperforms other models in prediction capacity. Its generalization ability in practice is further enhanced by comparing field measurement data and empirical equations. The findings suggest that, with the integrated in-situ tests, FE and ANN modeling could be used to predict deformation responses of deep excavations close to existing tunnels in soft soil. The present study is useful and valuable for practical risk assessment and mitigation decisions.

本研究探索了一种将基于原位试验的数值模拟与数据驱动建模相结合的综合框架，以评估深挖-隧道系统的性能。为了实现这一目标，本文以淤泥/砂质沉积物中与既有隧道相邻的深基坑为例，建立了基础三维有限元（3D-FE）模型。作为替代实验室测试的一种方法，采用锥入试验（CPT/CPTU）和地震膨胀试验（DMT/SDMT）等现场测试来确定一组高级本构模型参数。根据现场监测数据对所建立的开挖-隧道数值模型进行了验证。建立了数值模拟数据集，用于训练和测试四种机器学习模型（即人工神经网络（ANN），支持向量机（SVM），随机森林（RF）和光梯度增强机（LightGBM）），这些模型可以预测隧道的最大墙挠度，地表沉降，水平和垂直位移。结果表明，人工神经网络模型的预测能力优于其他模型。通过实测数据与经验方程的对比，进一步增强了其在实践中的泛化能力。研究结果表明，通过现场综合试验，有限元和神经网络模型可用于预测软土中靠近既有隧道的深基坑的变形响应。本研究对实际的风险评估和缓解决策是有用的和有价值的。

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引用次数: 0

Impact of ground motion characteristics on the seismic fragility of circular tunnels 地震动特性对圆形隧道地震易损性的影响

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-07-09 DOI: 10.1016/j.undsp.2024.09.008

Zhong-Kai Huang , Dong-Mei Zhang , Wu-Yu Zhang , Yong-Bo Li

The seismic performance of tunnel structure can be examined by fragility analysis, which determines the probability that demand will exceed capacity for a given hazard intensity. Although it is commonly understood that earthquake uncertainties dominate fragility features, the implication of ground motion characteristics on the shield tunnel fragility analysis has not been comprehensively explored. Thus, this study aims to compare the effects of various earthquake characteristics on the fragility of the investigated shield tunnels. To this end, a typical shield tunnel was chosen and modelled using the finite element software. In addition, to account for typical ground motion characteristics, various ground motion sets, including near-field no plus motions (NFNP), near-field motions with a pulse (NFP), and far-field motions (FF), are selected, and a fragility analysis was assessed for every set of ground motion. The fragility curves were generated employing peak ground acceleration (PGA) as the intensity measure (IM) and tunnel drift as the damage measure (DM). The findings indicate that shield tunnels subjected to NFP may be more vulnerable compared to those subjected to NFNP and FF ground motions. This study’s findings highlight the vital role of ground motion characteristics in evaluating the fragility of shield tunnels. Moreover, the results may inform future seismic risk and resiliency evaluations regarding the importance of considering or disregarding the impacts of ground motion characteristics on tunnel vulnerability.

隧道结构的抗震性能可以通过易损性分析来检验，易损性分析决定了在给定的危险强度下需求超过能力的概率。虽然人们普遍认为地震不确定性主导着盾构隧道的易损性特征，但地震动特征对盾构隧道易损性分析的影响尚未得到全面探讨。因此，本研究旨在比较不同地震特征对盾构隧道易损性的影响。为此，选取了一个典型的盾构隧道，利用有限元软件对其进行建模。此外，为了考虑典型的地面运动特征，选择了各种地面运动集，包括近场无加运动（NFNP）、近场脉冲运动（NFP）和远场运动（FF），并对每一组地面运动进行了脆弱性分析。采用峰值地面加速度（PGA）作为强度度量，隧道位移（DM）作为损伤度量，生成了脆性曲线。研究结果表明，与NFNP和FF地震动相比，NFP作用下的盾构隧道可能更脆弱。本研究结果强调了地震动特性在评估盾构隧道脆弱性方面的重要作用。此外，研究结果可以为未来的地震风险和弹性评估提供信息，说明考虑或忽视地面运动特征对隧道易损性的影响的重要性。

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引用次数: 0

Experimental and numerical study on the soil arching effect caused by deep-buried shield tunneling 深埋盾构隧道土拱效应的试验与数值研究

IF 8.2 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-07-09 DOI: 10.1016/j.undsp.2025.04.002

Xu Song , Chang-Wei Miao , Ren-Peng Chen , Xiao-Ning Deng , Yu Zhang , Jun-Qing Wang , Xiao-Fei Chen

The soil arching effect induced by deep-buried shield tunneling strongly influenced the ground stress and displacement. Therefore, revealing the evolution mechanism of the soil arching effect is a prerequisite for accurately predicting the tunnel load, which has not been understood in deep-buried conditions. Three model tests and eight numerical simulations were carried out to enhance the understanding of the soil arching evolution, in which the stress field, displacement field, and strain field were analysed. The experimental and numerical results indicated that the ground reaction curve presented a two-stage development process of an initially linear decrease followed by a gradual decrease. Compared with the theoretical tunnel loads, the measured and numerical values are relatively larger due to the loosening earth pressure theory ignoring the evolution process of the soil arching effect. The soil arching height decreases with the increase in stress level, measuring 1.75D (the initial diameter of the model tunnel), 1.65D, and 1.61D, respectively, which results from the lagging evolution of the soil arching effect under high-stress conditions. The formation of the shear band was affected by the stress-dependent dilatancy of the soil. At low stress levels, the shear band develops vertically upward. In contrast, at higher stress levels, the shear bands tilt towards the lateral side.

深埋盾构隧道开挖引起的土拱效应对地应力和位移影响较大。因此，揭示土拱效应的演化机制是准确预测深埋条件下隧道荷载的前提，而深埋条件下的土拱效应尚未得到充分认识。通过3次模型试验和8次数值模拟，分析了土拱演化过程中的应力场、位移场和应变场。试验和数值结果表明，地面反力曲线呈现先线性减小后逐渐减小的两阶段发展过程。由于松动土压力理论忽略了土拱效应的演化过程，与理论隧道荷载相比，实测值和数值均较大。土拱高度随应力水平的增加而减小，分别为1.75D（模型隧道初始直径）、1.65D和1.61D，这是高应力条件下土拱效应滞后演化的结果。剪切带的形成受土体应力依赖性剪胀的影响。在低应力水平下，剪切带垂直向上发育。相反，在较高的应力水平下，剪切带向侧向倾斜。

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引用次数: 0

Continuum-discrete coupling model for mechanical response analysis of tunnels subjected to non-uniform reverse faulting 非均匀逆断层作用下隧道力学响应分析的连续-离散耦合模型

IF 8.2 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-07-04 DOI: 10.1016/j.undsp.2025.03.005

Zhenning Ba , Yao Wang , Zhiwei Fang , Dongqiao Li

In recent decades, there have been numerous reports of damage cases involving tunnels crossing active faults. The mechanical response and failure mechanisms of cross-fault tunnels have become a key issue in the field of tunnel engineering. This study established a continuum-discrete coupling model comprising intact rock mass, fault zones, and tunnel. In this model, the tunnel and intact rock are modeled as continuous media, while the fault zone is modeled as a discrete medium. The non-uniform fault displacement is adopted to simulate the mechanical response and damage patterns of tunnels crossing active faults under reverse faulting. The simulation results are validated by comparison with the damage of Longchi tunnel observed from 2008 Wenchuan earthquake in China, as well as the experimental phenomenon from the model test. The results demonstrate that the proposed coupling model effectively reproduces the tunnel failure modes caused by reverse faulting. In addition, the high consistency between the simulation results and experimental data further confirms computational accuracy and reliability of the coupling model. A parametric analysis based on the Xianglushan tunnel in China is carried out to investigate the effects of fault displacements, fault widths, dip angles and fault zone rock mass qualities on damage patterns of crossing-fault tunnels. This study provides a valuable reference for seismic fortification of the tunnel crossing reverse faults.

近几十年来，有许多关于隧道穿越活动断层的损坏案例的报道。跨断层隧道的力学响应和破坏机制已成为隧道工程领域的一个关键问题。建立了完整岩体、断裂带和隧道的连续-离散耦合模型。在该模型中，隧道和完整岩石被建模为连续介质，而断裂带被建模为离散介质。采用非均匀断层位移模拟逆断层作用下隧道穿越活动断层的力学响应和破坏模式。通过与2008年中国汶川地震龙池隧道的破坏观测以及模型试验的实验现象进行对比，验证了模拟结果。结果表明，所建立的耦合模型能较好地再现逆断层作用下隧道的破坏模式。此外，仿真结果与实验数据的高度一致性进一步证实了耦合模型的计算精度和可靠性。以湘芦山隧道为例，通过参数化分析，探讨了断层位移、断层宽度、断层倾角和断裂带岩体质量对跨断层隧道破坏模式的影响。该研究为逆断层隧道的抗震设防提供了有价值的参考。

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引用次数: 0