Underground Space最新文献_第4页

Influence of water content on the failure modes and macro-micromechanical properties of sulfate rocks: Insights from experimental and DEM simulations 含水量对硫酸盐岩石破坏模式和宏观微观力学特性的影响：来自实验和DEM模拟的见解

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-10-15 DOI: 10.1016/j.undsp.2025.06.005

Li Yu , Youlin Qin , Hualao Wang , Mingnian Wang , Zhaohui Chen , Mingyang Yu , Hong Jin

The initial water content significantly affects rock mechanics, especially with swelling minerals. However, the effects of initial water content on the mechanical properties and failure mode of sulfate rocks remain unclear. This study explores these effects by conducting unconfined compressive strength (UCS) experiments and discrete element method simulations on sulfate rocks. The results indicate that as the initial water content increased from 0 to 9%, the Young’s modulus and Poisson’s ratio of sulfate rock exponentially decreased by 48.9% and 290%, respectively. Additionally, the crack initiation stress (

σ_{c i}

), crack damage stress (

σ_{c d}

), and UCS decreased by 62.4%, 51.5%, and 53.3%, respectively. The stress responses to initial water content follow linear functions. Notable decreases were also observed in the normal and shear stiffness parameters (

k_{n}

and

k_{s})

of contact, diminishing by 46.53% and 46.54%, respectively; peak cohesion decreased by 69.70%; peak friction angle by 17.39%; peak tensile strength by 124%. Rising initial water content leads to increased damage and softening of sulfate rock, causing decreased mechanical properties. It can be observed that as the initial water content increases, the proportion of micro-tensile fractures in the total number of fractures increases, and the dominant failure mode of sulfate rock gradually transitions from shear to tensile failure.

初始含水量显著影响岩石力学性质，尤其是溶胀矿物。然而，初始含水量对硫酸盐岩力学性能和破坏模式的影响尚不清楚。本文通过对硫酸盐岩进行无侧限抗压强度（UCS）试验和离散元法模拟，探讨了这些影响。结果表明：当初始含水量从0增加到9%时，硫酸盐岩的杨氏模量和泊松比分别指数下降48.9%和290%；裂纹起裂应力（σci）、裂纹损伤应力（σcd）和UCS分别降低了62.4%、51.5%和53.3%。应力对初始含水量的响应服从线性函数。接触法向刚度和剪切刚度参数（kn和ks）也显著减小，分别减小46.53%和46.54%；峰内聚力降低69.70%；峰值摩擦角减小17.39%；峰值抗拉强度提高124%。初始含水量的增加导致硫酸盐岩的损伤和软化加剧，力学性能下降。可以观察到，随着初始含水量的增加，微拉伸裂缝占裂缝总数的比例增加，硫酸盐岩的主导破坏模式逐渐由剪切破坏向拉伸破坏转变。

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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 : 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

Hydraulic-rock-structural responses of close-spaced shield-driven twin tunnels: Insights from in-situ monitoring and three-dimensional numerical simulation 近间距盾构双隧道的水力-岩石-结构响应：来自原位监测和三维数值模拟的见解

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-10-04 DOI: 10.1016/j.undsp.2025.05.010

Chengwen Wang , Xiaoli Liu , Nan Hu , Wenli Yao , Enzhi Wang , Jianhong Jia

Twin-tunnel construction inevitably interacts under complex geological conditions, inducing highly complex hydraulic-rock-structure interactions. This study proposes a micro-electro-mechanical systems (MEMS)-based automatic monitoring system for in-situ measurement of rock and structural responses. It measures pore pressure, earth pressure, rock displacement, and additional stress and displacement of segments. Test results reveal three evolutionary stages: pre-shield arrival, shield passage, and post-shield passage. The final distribution and disturbance extent of these responses correlate with tunnel distance. A 3D refined numerical model incorporating the fluid–solid coupling and detailed construction process is developed. Numerical results analyze excess pore pressure, vault settlement, lining response, and key construction parameter effects (face and grouting pressure). Findings enhance understanding of twin tunnel interactions and hydraulic-rock-structural response mechanisms, providing insights for similar projects.

在复杂的地质条件下，双隧洞施工不可避免地相互作用，引起高度复杂的水工-岩-构相互作用。提出了一种基于微机电系统（MEMS）的岩石和结构响应原位测量自动监测系统。它可以测量孔隙压力、土压力、岩石位移以及管片的附加应力和位移。试验结果显示了三个演化阶段：盾构到达前、盾构通过和盾构通过后。这些响应的最终分布和扰动程度与隧道距离有关。建立了考虑流固耦合和详细施工过程的三维精细数值模型。数值结果分析了超孔隙压力、拱顶沉降、衬砌响应以及关键施工参数（工作面和注浆压力）的影响。研究结果增强了对双隧道相互作用和水力-岩石-结构响应机制的理解，为类似项目提供了见解。

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引用次数: 0

Resilience of shield tunnel subjected to adjacent construction disturbances: A review 盾构隧道在邻近施工扰动下的回弹性研究进展

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-09-30 DOI: 10.1016/j.undsp.2024.12.007

Dong-Mei Zhang , Bin-Lin Gan , Zhong-Kai Huang , Rui Zhu , Wei Zhang

With the intensive and rapid development of urban underground space, there are more and more adjacent construction disturbances to the existing shield tunnels, posing serious challenges to their safety operation and maintenance. Resilience is an integrated representation of the ability of the engineering systems to resist disaster disturbances and recover function, and it can comprehensively reflect the impact of adjacent construction disturbances on the whole disaster chain of shield tunnels. However, the field currently faces challenges related to vague definitions of resilience, diverse evaluation indicators and measures, and an emphasis on evaluation rather than enhancement. Hence, this paper firstly summarized the definition of engineering resilience, especially the resilience of shield tunnels, and proposed the resilience definition of shield tunnels under adjacent construction disturbance, considering the basic connotation of resilience and disturbance characteristics. Secondly, the existing resilience evaluation frameworks for shield tunnels were summarized and analyzed, and the applicability of the existing framework for the shield tunnel under adjacent construction was discussed in light of the disturbance characteristics. Building on the mechanism and deformation characteristics, the resilience evaluation indexes and evaluation methods were reviewed based on the indicators of influencing factors and indicators of effectiveness of the entire disaster chain. Afterwards, the synergistic enhancement technology of shield tunnel resilience was summarized into 4 aspects: optimal structural design, disturbance transmission blocking, structural performance enhancement, and stratum grouting. Finally, research prospects in this field were analyzed systematically. This paper is intended to provide a meaningful reference for the in-depth research and application of structural resilience of shield tunnels subjected to adjacent construction disturbances.

随着城市地下空间的集约快速发展，既有盾构隧道的相邻施工干扰越来越多，对盾构隧道的安全运维提出了严峻的挑战。弹性是工程系统抗灾害干扰能力和恢复功能的综合表征，可以综合反映相邻施工干扰对盾构隧道整个灾害链的影响。然而，该领域目前面临着与弹性定义模糊，评估指标和措施多样化以及强调评估而不是增强相关的挑战。因此，本文首先总结了工程回弹性的定义，特别是盾构隧道的回弹性，在考虑回弹性的基本内涵和扰动特征的基础上，提出了相邻施工扰动下盾构隧道的回弹性定义。其次，对现有盾构隧道回弹性评估框架进行了总结和分析，并针对盾构隧道的扰动特征，讨论了现有框架对临近施工盾构隧道的适用性。在机理和变形特征的基础上，基于全灾链影响因素指标和有效性指标，对恢复力评价指标和评价方法进行了综述。随后，将盾构隧道回弹性协同增强技术归纳为结构优化设计、干扰传递阻断、结构性能增强、地层注浆4个方面。最后，对该领域的研究前景进行了系统分析。本文旨在为盾构隧道在邻近施工扰动下的结构回弹性的深入研究和应用提供有意义的参考。

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引用次数: 0

Effect of strain rate on the fracture behavior of granite under unconfined compression: A meso-scale energy evolution perspective 应变速率对无侧限压缩下花岗岩断裂行为的影响：一个细观能量演化视角

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-09-26 DOI: 10.1016/j.undsp.2025.05.009

Qinyuan Liang , Hengxing Lan , Yu Zhou , Shijie Liu , Bo Li , Langping Li , Han Bao

The macro mechanical behavior of rock material is attributed to the meso/mineral characteristics. To deeply reveal the mechanisms of strain rate effect on mechanical properties and crack propagation, a series of unconfined compression experiments and simulations for exploring the meso-scale characteristic were conducted at different strain rates. Based on the micro-loading equipment with microphotography capabilities and the numerical grain-based model method, the meso-scale crack propagation and energy evolution characteristics of granite during the pre-peak loading process were analyzed. The results indicate that with the increase of strain rate, the crack distribution entropy value increases, which means that cracks are more evenly distributed among various minerals. The differences in stored elastic strain energy among different minerals decrease, resulting in more uniform energy release. In addition, cracks associated with biotite transits from intergranular to transgranular modes. Therefore, the increased strain rate can prompt more minerals to participate in deformation, thereby enhancing the mechanical properties. This study deeply reveals the mechanisms of strain rate on granite crack propagation at the meso-scale, offering valuable insights for the stability and safety of underground space engineering.

岩石材料的宏观力学行为是由细观/矿物特征决定的。为深入揭示应变率对裂纹扩展和力学性能影响的机理，开展了不同应变率下的无侧限压缩实验和细观尺度特征模拟研究。基于具有显微摄影功能的微加载设备和基于颗粒的数值模型方法，分析了花岗岩峰前加载过程的细观裂纹扩展和能量演化特征。结果表明：随着应变速率的增大，裂纹分布熵值增大，表明裂纹在各种矿物间的分布更加均匀；不同矿物间储存弹性应变能的差异减小，使能量释放更加均匀。此外，与黑云母有关的裂缝由晶间模式过渡到穿晶模式。因此，增加应变速率可以促使更多的矿物参与变形，从而提高力学性能。该研究在细观尺度上深入揭示了应变速率对花岗岩裂纹扩展的影响机制，为地下空间工程的稳定与安全提供了有价值的见解。

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引用次数: 0

Integrated geophysical and computational modeling of hydromechanical mechanisms of underground debris flows in mining region 矿区地下泥石流流力学机制的综合地球物理与计算模拟

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-09-25 DOI: 10.1016/j.undsp.2025.06.002

Yu Zhang , Kun He , Xiewen Hu , Wenlian Liu , Sugang Sui , Gang Luo , Mei Han

Underground debris flows, arising from the complex interplay of anthropogenic activities and rainfall-induced hydromechanical processes, present significant geotechnical hazards that remain poorly understood due to their hidden nature and dynamic multiphase triggers. Focusing on underground debris flow in a mining area in Southwest China, this study advances an integrated framework combining air-ground transient electromagnetic method (AGTEM) and computational fluid dynamics coupled with the discrete element method (CFD–DEM), revealing the migration mechanism in which microscale multiphase hydraulic erosion drives the macroscopic initiation of underground debris flow. Key findings include: (1) The identification of three transport phases (rapid erosion, slow erosion, and stabilization) provides actionable thresholds for monitoring and mitigation. (2) The coupled feedback between hydraulic conductivity anisotropy and the formation of preferential flow is the primary driver of large-scale debris transportation. (3) Linking mining-induced seismic energy to vibration-induced liquefaction via DEM simulations offers a physics-based explanation for flow mobilization triggers. The integrated geophysical-numerical framework offers new capabilities for predicting initiation thresholds and developing physics-based mitigation strategies in mining-affected terrains.

地下泥石流是由人为活动和降雨引起的流体力学过程的复杂相互作用引起的，由于其隐藏性和动态多相触发因素，造成了重大的岩土危害，但人们对其了解甚少。以西南某矿区地下泥石流为研究对象，提出了气地瞬变电磁法（AGTEM）与计算流体力学耦合离散元法（CFD-DEM）相结合的综合框架，揭示了微尺度多相水力侵蚀驱动地下泥石流宏观起动的运移机制。主要发现包括：(1)确定三个迁移阶段（快速侵蚀、缓慢侵蚀和稳定）为监测和缓解提供了可操作的阈值。(2)导流各向异性与优先流形成之间的耦合反馈是大规模岩屑输运的主要驱动因素。(3)通过DEM模拟将采矿引起的地震能量与振动引起的液化联系起来，为流动动员触发器提供了基于物理的解释。综合地球物理-数值框架为预测采矿影响地形的起始阈值和制定基于物理的缓解战略提供了新的能力。

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引用次数: 0

Biaxial compression behavior and stability analysis of wedge blocks in tunnel sidewalls: Experimental investigation and support effect evaluation 隧道侧壁楔块体双轴压缩特性与稳定性分析：试验研究与支护效果评价

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-09-24 DOI: 10.1016/j.undsp.2025.05.008

Ruiyang Bi, Minghui Liu, Jian Zhou, Kun Du

In complex jointed rock masses, wedge blocks are likely to form on the tunnel sidewalls after excavation, and the mechanical properties and stress environment of the surrounding rock have a significant impact on their stability. In this study, cubic rock specimens with prefabricated wedge blocks and arched tunnel features were tested under biaxial compression. Acoustic emission (AE) and digital image correlation technologies were used to monitor crack propagation and specimen failure in real-time. The results showed that supported specimens exhibited higher strength during both the peak and post-peak stages, with a slower strength decline after the peak. The support regulated AE hit rates and enhanced energy storage capacity. Different specimens displayed varying strain evolution, with supported specimens generally having higher lateral strain than shear strain. In unsupported specimens, tensile and shear stresses were concentrated at the wedge block apex, while supported specimens showed more complex stress variations, especially under the influence of wedge blocks. Stable specimens experienced shear sliding failure, while extremely stable specimens experienced both shear sliding and tensile fracture. As horizontal stress (σ₃) increased, specimen strength and wedge block failure both increased. Triangular wedge blocks played a decisive role in tunnel stability, with extremely stable triangular blocks providing greater safety. In addition, a typical stability analysis method for wedge blocks was proposed. The findings provide a scientific basis for rock mass stability assessment and support measure selection in tunnel design.

在复杂节理岩体中，开挖后巷道侧壁容易形成楔形块体，围岩的力学特性和应力环境对其稳定性有重要影响。本研究采用预制楔块体和拱形隧道特征的立方体岩石试件进行双轴压缩试验。采用声发射（AE）和数字图像相关技术对裂纹扩展和试样破坏进行实时监测。结果表明：受支试件在峰值和峰后阶段均表现出较高的强度，峰值后强度下降较慢；该支持规范了AE命中率并增强了储能容量。不同的试件表现出不同的应变演化，受支试件的侧向应变普遍高于剪切应变。无支护时，拉剪应力集中在楔块体顶端，而有支护时，应力变化更为复杂，楔块体的影响尤为明显。稳定试件经历剪切滑动破坏，极稳定试件经历剪切滑动破坏和拉伸破坏。随着水平应力σ3的增大，试件强度和楔块破坏均增大。三角楔块体在隧道稳定中起着决定性的作用，极其稳定的三角块体提供了更大的安全性。此外，还提出了一种典型的楔块体稳定性分析方法。研究结果为隧道设计中岩体稳定性评价和支护措施选择提供了科学依据。

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引用次数: 0

Experimental study on large-scale subway station model considering adjustable water and soil pressure 考虑可调水土压力的大型地铁车站模型试验研究

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-09-20 DOI: 10.1016/j.undsp.2025.05.007

Dongbo Zhou , Yuan Mei , Xin Ke , Ziyang Liu , Wangyang Xu

To investigate the structural stress conditions during the excavation and failure stages of subway stations under adjustable water and soil pressures, a 1∶10 scaled model was created based on similarity theory. Considering the equivalent soil pressure load, the loading procedures that controlled the excavation and failure of a metro station created via the cover excavation reverse construction method were evaluated. Additionally, an excavation unloading device and an external soil pressure-based graded loading device were developed for a metro station created via the cover excavation reverse construction method. By comparing the experimental results with the finite element simulation results, the axial force variations in the balance props during the excavation process were revealed, and the crack development process of the metro station was summarized. The external soil pressure remained unchanged; furthermore, the increase in the axial force of the balance props was negatively correlated with the distance to the previous balance prop and positively correlated with the axial force of the previous balance prop at the time of unloading. According to the graded soil pressure load and the corresponding crack initiation, development, and structural failure states, the model failure process was divided into four stages: the no-crack stage, initial cracking stage, crack penetration stage, and local damage stage. The first cracks in the station structure appeared at the corners and centers of the excavation openings. The first penetration of transverse cracks appeared in the middle of the basement first-floor wall. The cracks at the excavation opening corners and middle locations developed obliquely, forming an overall horseshoe shape. Localized damage first occurred at the corners where concrete spalled, exposing the reinforcement.

为研究可调水、土压力作用下地铁车站开挖及破坏阶段的结构应力状况，基于相似理论建立了1∶10比例模型。考虑等效土压力荷载，对覆盖开挖反施工法地铁车站开挖破坏控制的加载程序进行了评价。另外，针对某地铁覆盖开挖反施工法建设的车站，研制了开挖卸载装置和基于外部土压力的分级加载装置。通过试验结果与有限元模拟结果的对比，揭示了平衡支柱在开挖过程中轴向力的变化规律，总结了地铁车站裂缝的发展过程。外土压力保持不变；此外，平衡支柱轴向力的增加与与前一个平衡支柱的距离呈负相关，与卸载时前一个平衡支柱的轴向力呈正相关。根据分级土压力荷载及相应的裂缝萌生、发展和结构破坏状态，将模型破坏过程分为无裂缝阶段、初始裂缝阶段、裂缝穿透阶段和局部损伤阶段4个阶段。车站结构的第一次裂缝出现在开挖洞口的角落和中心。横向裂缝首次穿透出现在地下室一层墙体中部。开挖口角和中间位置的裂缝呈斜向发育，整体呈马蹄形。局部破坏首先发生在混凝土剥落的角落，暴露了钢筋。

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引用次数: 0

Seismic resilience analysis of high-speed railway tunnels across fault zones using ensemble learning approach 基于集成学习方法的高速铁路跨断裂带隧道抗震弹性分析

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-09-20 DOI: 10.1016/j.undsp.2025.04.011

Lianjie Yang , Chunlei Xin , Zhao Wang , Xinyuan Yu , Iman Hajirasouliha , Wenkai Feng

Severe damage to the Daliang high-speed railway tunnel during earthquakes primarily results from the dynamic interplay between fault dislocation and intense seismic forces near fault lines, accompanied by their complex feedback mechanisms. This study introduces a novel hybrid finite element model to explore the impact of fault dislocation-induced earthquakes on tunnel lining integrity. The influence of seismic characteristics on factors such as peak ground acceleration, tunnel structure form, and the shear modulus of surrounding rock is analyzed. Extensive numerical simulations investigate the coupling effects of faults and various seismic motions on tunnel structures. Additionally, a rapid resilience assessment model for tunnels crossing strike-slip faults is developed using the Adaboost algorithm. This model evaluates the seismic fragility and resilience of such tunnels, offering insights into the anti-seismic behaviors of three distinct tunnel lining configurations under the combined stresses of fault dislocation and significant seismic activity. Furthermore, the fault damage characteristics of the crossing-fault high-speed railway tunnel are assessed, based on real earthquake damage classification and current seismic codes. Findings demonstrate that the evaluation model is both highly accurate and efficient, serving as an effective alternative to traditional nonlinear time-history analysis of tunnel structures. Research shows that critical factors influencing seismic fragility and resilience include the structural design of the tunnel, shear modulus of the surrounding rock, peak ground acceleration, and tunnel height. Simulations reveal that tensile and compressive damage are significantly reduced in circular tunnels with a shock-absorbing joint compared to original tunnel prototypes. Overall, damage assessments from actual faults in crossing-fault high-speed railway tunnels correlate well with numerical predictions, providing essential references for structural recovery and safety evaluations post-earthquake.

大梁高速铁路隧道在地震过程中的严重破坏，主要是断层位错与断层线附近强烈地震力相互作用的结果，并伴有复杂的反馈机制。本文引入了一种新的混合有限元模型来探讨断层错动地震对隧道衬砌完整性的影响。分析了地震特征对峰值地面加速度、隧道结构形式、围岩剪切模量等因素的影响。大量的数值模拟研究了断层和各种地震运动对隧道结构的耦合效应。此外，利用Adaboost算法建立了隧道穿越走滑断层的快速弹性评估模型。该模型评估了此类隧道的地震脆弱性和恢复力，为断层错位和强烈地震活动联合应力下三种不同隧道衬砌结构的抗震行为提供了见解。基于实际地震震害分类和现行抗震规范，对跨断层高速铁路隧道的断层损伤特征进行了评价。结果表明，该评价模型具有较高的准确性和有效性，可作为传统非线性隧道结构时程分析的有效替代方法。研究表明，隧道结构设计、围岩剪切模量、峰值地面加速度和隧道高度是影响隧道地震易损性和恢复力的关键因素。模拟结果表明，与原始隧道模型相比，圆形隧道中减震接头的拉伸和压缩损伤显著降低。总体而言，跨断层高速铁路隧道实际断层损伤评估与数值预测吻合较好，为结构恢复和震后安全评价提供了重要参考。

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引用次数: 0

Towards trustworthy excavation-induced risk warning for adjacent building: A Bayesian reasoning based probabilistic deep learning method 基于贝叶斯推理的概率深度学习方法实现相邻建筑挖掘风险可信预警

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space

Pub Date : 2025-09-19 DOI: 10.1016/j.undsp.2025.05.006

Yue Pan , Xuyang Li , Jianjun Qin , Jinjian Chen , Paolo Gardoni

Foundation pit excavation for underground space development inevitably disrupts the surrounding soil, raising safety concerns for adjacent buildings. To address the need for an intelligent and trustworthy warning of the excavation-induced risk for adjacent buildings, this study develops a hybrid deep learning framework for probabilistic modeling (PM) with a long short-term memory (LSTM) neural network (termed as PM-LSTM). The proposed framework incorporates Bayesian reasoning and a bidirectional mechanism to enhance its predictive capabilities. The forward learning process enables the dynamic estimation of the probability that adjacent buildings will experience varying levels of risk over time, as new data is incorporated. Meanwhile, it can precisely calculate the first exceeding probability of the adjacent building entering an extremely high-risk level daily, facilitating early warning triggers. Besides, the reverse learning process leverages Bayesian reasoning to identify the most influential response parameters of the foundation pit, serving as key checkpoints for excavation monitoring. It further calculates the posterior probabilities and their intervals for each response parameter under the assumption of a specific risk state for adjacent structures. These insights enable the formulation of proactive risk mitigation measures. The proposed PM-LSTM framework is validated through a case study of the excavation project at Zone A of Jing’an Temple Station on Shanghai Metro Line 14. Comparative analyses further demonstrate the robustness of the framework, underscoring its potential as a reliable decision-making tool for risk analysis and management in complex and uncertain underground engineering projects.

地下空间开发的基坑开挖不可避免地破坏了周围的土壤，引起了邻近建筑物的安全问题。为了解决对邻近建筑挖掘风险的智能和可信预警的需求，本研究开发了一个混合深度学习框架，用于概率建模（PM）和长短期记忆（LSTM）神经网络（称为PM-LSTM）。提出的框架结合了贝叶斯推理和双向机制，以提高其预测能力。随着新数据的加入，前向学习过程可以动态估计相邻建筑物随着时间的推移将经历不同程度风险的概率。同时，每天精确计算相邻建筑进入极高风险等级的第一次超越概率，便于预警触发。反向学习过程利用贝叶斯推理识别基坑最具影响的响应参数，作为基坑开挖监测的关键关卡。进一步计算了相邻结构在特定风险状态下各响应参数的后验概率及其区间。这些见解有助于制定主动的风险缓解措施。以上海地铁14号线静安寺站a区开挖工程为例，对所提出的PM-LSTM框架进行了验证。对比分析进一步证明了该框架的稳健性，强调了其作为复杂和不确定地下工程项目风险分析和管理的可靠决策工具的潜力。

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引用次数: 0