样式: 排序: IF: - GO 导出 标记为已读
-
Application of physics-data-driven method to identify the weak interlayers in underground geotechnical engineering Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-24
Zitao Chen, Quansheng Liu, Penghai Deng, Yin Bo, Demei Liu, Yucong Pan, Honggan YuThe accurate description of the internal structure of weak interlayers is a prerequisite for the safe construction of deep geotechnical engineering with complicated geological conditions. Geophysical tomography techniques are usually used to detect the mechanical properties and spatial distribution and of deep weak interlayers. However, the mechanical properties of weak interlayers cannot be measured
-
Assessment and spatial variation analysis of the collaborative development potential between underground public spaces and urban rail transit in China’s urban central areas Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-24
Xiaochun Hong, Shengcai Li, Wanghu Sun, Xiang JiThe collaborative development of underground public spaces (UPS) and urban rail transit (URT) in urban central areas is becoming increasingly common in China. However, the lack of a scientific assessment of collaborative development potential leads to some cities experiencing overdevelopment while others underestimate their development needs. This study addresses this gap by conducting a scientific
-
Mechanism of spillage plumes from multiple openings on ceiling temperature distribution in metro tunnel fires based on superposition principle Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-24
Zhihe Su, Yanfeng Li, Runzhou Luo, Hua Zhong, Junmei Li, Zhihao Geng, Zhicheng GuoThis study revisits the coupling effects of tunnel ceiling temperature distribution caused by plume escapes from metro carriage doors during a fire. The impact of fire heat release rates on the ceiling temperature distribution under various door-opening scenarios was analysed by utilising the superposition principle. The concept of virtual fire sources was proposed to model the ceiling temperature
-
Unsupervised seepage segmentation pipeline based on point cloud projection with large vision model Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-24
Zhaoxiang Zhang, Ankang Ji, Zhuan Xia, Limao Zhang, Yuelei Xu, Qing ZhouTargeting to sustain the operational safety of tunnels, this paper presents a projection-based approach utilizing large vision model (LVM) inference for efficient and effective multi-class segmentation, including the identification of seepage, in 3D point clouds of tunnels. The proposed approach employs an unsupervised strategy based on point projection and label correction to process input point clouds
-
A laboratory study of conditioning clay-rich soils in seawater environments for EPBS tunnel constructions in coastal areas Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-24
Bingnan Wang, Ming Huang, Yao Lu, Chaoshui Xu, Yu WangLand reclamation from the sea is increasingly common in coastal areas in China as its urban population continues to grow and the construction of subways in these areas becomes an effective way to alleviate transportation problems. Earth pressure balance shield (EPBS) tunneling in reclaimed lands often faces the problem of seawater erosion which can significantly affect the effectiveness of soil conditioning
-
Seismic failure analysis and simplified prediction methods for underground frame structures at earth fissure sites Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-24
Zhi Chen, Zhongming Xiong, Xuan Chen, Penggang Tian, Jianhui Niu, Zhixun XieEarth fissures pose a significant risk to the seismic safety of underground structures at earth fissure sites (USEFs), particularly for large-scale underground frame structures such as subway stations. To date, the failure mechanism of USEFs has only been analyzed qualitatively and requires further comprehensive investigation. Moreover, the existing failure prediction methods for USEFs are complicated
-
SAM4Tun: No-training model for tunnel lining point cloud component segmentation Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-24
Zehao Ye, Wei Lin, Asaad Faramarzi, Xiongyao Xie, Jelena NinićAsset management ensures the safety and longevity of structures through regular maintenance. Reality capture technologies are increasingly being used for asset inspections to obtain information by generating point cloud data, which is becoming more prevalent in tunnel asset management for precise documentation of tunnel geometry and condition. Integrating semantic information from point clouds is crucial
-
Numerical simulation analysis of energy evolution law and distribution characteristics of anchored body unidirectional loading Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-23
Xue-kui Xin, Qing-bin Meng, Hai Pu, Jiang-yu WuEnergy serves as the fundamental driver of material failure, and accurately describing the mechanical properties and energy evolution laws of loaded anchored body is crucial for the stability control of surrounding rock in bolt-supported roadways. Based on uniaxial compression tests of rock samples and utilizing the embedded Fish programming language in FLAC3D, numerical models of loaded sandstone
-
Analysis of slab buckling rockburst of surrounding rock under dynamic and static combined disturbance Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-23
Feng Chen, Ruxuan Li, Kaixing Wang, Yanhong Du, Chun’an Tang, Yishan Pan, Zhuo DongSlab buckling rockburst is a common form of rockburst under high ground stress conditions, posing a serious threat to engineering safety. Based on the catastrophe model of slab buckling rockburst of surrounding rock, the expressions of control variables of a single rock slab and combined rock slab under quasi-static effect in catastrophe theory are obtained. The tendency of rockburst in the deep-buried
-
Optimization study of cooling parameters of the high-temperature working face in underground engineering Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-22
Song Xin, Yiwen Hu, Shangxiao Liu, Zhen ZhangTo address the escalating thermal risks and suboptimal cooling capacity distribution of centralized refrigeration systems in large-width faces, this study developed a specialized “high-efficiency air cooler for working faces” and introduced an innovative cooperative cooling strategy integrating air coolers, dust suppression water, and emulsion (A-D-E system). Numerical simulations and field measurements
-
Full-scale experimental study on the smoke and thermal insulation of a water mist fire extinguishing system in a short road tunnel with natural ventilation Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-22
Deyuan Kan, Shouzhong Feng, Zhiguo Yan, Long Zhou, Hehua ZhuTunnel fires have become a huge threat to human life and property, and the large amount of smoke and thermal produced by the fire is the principal cause of human casualties. The water mist system is considered a highly promising fire extinguishing technology. However, the research on the water mist system which could simultaneously extinguish fire and block smoke is rare. The objective of this study
-
Characterization of particle size distribution of rock chips and evaluation of rock breaking efficiency of TBM based on multifractal theory: A case study Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-21
Jianping Liu, Zhijia Zhou, Yucong Pan, Quansheng LiuIn the process of rock breaking by a TBM (Tunnel boring machine), the particle size distribution of rock chips is affected by both rock lithology and TBM operational parameters, showing typical variability and inhomogeneity. Multifractal theory can describe the variability and inhomogeneity of the particle size distribution of rock chips more comprehensively. Therefore, this study attempts to quantitatively
-
Application and mechanism of a novel flocculation reagent for mechanical dewatering: A case study on slurry separation in a large-diameter slurry shield Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-21
Jian Zhang, Guoping Ren, Tugen Feng, Yu Liang, Yihao YinA novel C-type flocculation reagent was developed to address the high water content of sludge and the environmental pollution caused by wastewater discharge during mechanical dewatering in the Zhanjiang Bay undersea tunnel. Microscopic parameters, such as particle size and zeta potential, were analyzed to elucidate the flocculation and dewatering mechanisms of the C-type reagent. The applicability
-
Creep-slip behaviors of surrounding rocks in a water diversion tunnel considering strike-slip and dip-slip scenarios Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-21
Chengwei Zhao, Hui Zhou, Chuanqing Zhang, Wenbo Liu, Lingyu Li, Zhongbo Liu, Zhengyang HuoA 3D numerical model of distributed fault is established in this paper. Considering both strike-slip and dip-slip, the stress evolution and spatial–temporal migration characteristics of surrounding rock at different creep-slip times and depths are analyzed during creep-slip. The failure approach index (FAI) was employed to assess the failure degree. The results show that the shearing and squeezing
-
Simulation of screening characterization of double-deck vibrating screen of slurry TBM tunnelling using integrated CFD-DEM-FEM Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-21
Yidong Guo, Yingran Fang, Xinggao Li, Dalong Jin, Hongzhi LiuTo evaluate and optimize the screening characterization of double-deck vibrating screen of slurry TBM tunnelling, a three-dimensional (3D) coupled model of vibrating screen was established based on an integrated CFD-DEM-FEM method in this paper. The transport characteristics of particles and the fluidity of slurry were revealed, and the kinetic response of the screen surfaces was comprehensively analyzed
-
Study on construction mechanical characteristics and pinch rocks reinforcement schemes of honeycomb tunnel clusters in Mountainous City Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-21
Hai Chen, Xiaohan Zhou, Xinrong Liu, Suliman Lojain, Qiang Xu, Lijun RenDue to the growing need for underground space and the acceleration of urbanization, narrow clearance tunnel clusters are being created, making construction more challenging. This paper investigated tunnel clusters consisting of five parallel tunnels at Hongyan Village in Chongqing as a background project. The mechanical behaviour of the clusters has been studied by using three main methods as the following:
-
Intelligent monitoring-based resilience assessment system for prefabricated underground structures based on restorability Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-20
Tong Qiu, Xiangsheng Chen, Wei Rao, Dong Su, Xiaohua Bao, Chengyu HongIn the context of low-carbon strategies, China has joined the global leadership series of prefabricated underground structures (PUS). However, PUS faces significant challenges in construction, maintenance, and restoration subjected to multi-hazard impacts, particularly at the assembled joints. Addressing this research gap, this study focuses on the PUS life-cycle resilience based on joint restorability
-
Fine controlled blasting of subsurface excavation for subway stations in soft–hard mixed-medium rock mass Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-20
Wanzhi Zhang, Jie Mei, Keguo Sun, Bangshu XuDrilling and blasting excavation methods along with primary arch-cover primary supports are frequently employed in the construction of urban subway stations. However, traditional blasting methods fail to control tunnel face flatness, overbreak, and underbreak in soft–hard mixed-medium rock mass owing to symmetric and invariable blasting parameters. The Shishan Road Station of Qingdao Metro Line 6 is
-
Tunnel intersection mechanics: Closed-form pseudo-3D approximations for deformation modeling and shear-failure prediction Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-20
Andreas MichaelDeformation modeling of underground tunnel intersections attempts to provide answers on the occurrence of localized structural instabilities under different, and possibly dynamically-changing, in-situ conditions. Design decisions hinge on these findings; since much of the stresses underground are compressive, shear-failure predictions provide outlines for maintaining structural stability on the intersections
-
Study on the deformation of existing tunnel under the combined effect of pit excavation and dewatering based on the Kerr foundation model Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-20
Meng Fei, Qiao ShifanThere is a significant progression towards the trend of significant depth and extensive scale in foundation pit construction, where the excavation range is large and dewatering measures are usually required. To overcome the shortcomings associated with the complexity of the 3D numerical analysis model and the long period of on-site measurement in existing studies, a two-stage analysis method is proposed
-
Time-dependent seismic fragility analysis of subway station structure subjected to chloride-induced corrosion Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-20
Zilan Zhong, Jiaxi Guo, Bu Zhang, Xiuli DuSubway station structures near coast are at risk of corrosion caused by chloride, resulting in material and structural component deterioration over time and impacting overall performance during earthquakes. This study proposes a numerical framework for the time-dependent seismic fragility analysis of subway station structures, considering chloride-induced corrosion, based on the IDA method. This study
-
Enhancing convergence speed and accuracy of virtual field optimization method for microseismic source location in tunnels Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-20
Jian He, Huailiang Li, Binhong Li, Nuwen Xu, Junnan Wen, Yuedong LiAccurate and rapid microseismic source location is the foundation for tunnel rockburst warning. Here, we present a novel location strategy that employs an improved mayfly algorithm (IMA) to enhance the convergence speed and accuracy of the virtual field optimization method (VFOM) for tunnel microseismic events. By optimizing the initial position of the mayfly population and the moving velocity of mayfly
-
Probability analysis on tunnels in heterogeneous strata based on borehole data-driven conditional random fields and convolutional neural network Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-18
Gaoyu Ma, Chuan He, Zhengshu He, Rongmin Bai, Guowen XuTunnels in heterogeneous strata always encounter spatially varied geological formations, causing asymmetric responses and localized failure in the supporting structure. The homogeneity assumption for surrounding strata, commonly adopted in tunnel design and construction, will neglect the inherent spatial uncertainty of rock mass and lead to the overestimation in tunnel bearing capacity. The conventional
-
Axial chain rockbursts in deep tunnels excavated via drilling and blasting Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-18
Hong-Pu Li, Ben-Guo He, Xiang-Rui Meng, Shengcun Yan, Tao ChenChain rockbursts have a long duration and significant hazards, severely affecting construction progress, yet their occurrence patterns and formation mechanisms remain unclear. Monitoring was conducted on a deeply buried tunnel in southwest China for axial chain rockbursts (ACRs) occurrences. The recorded ACRs (23 weak, 3 moderate, and 3 intense) were analyzed to reveal their patterns of occurrence
-
Multi-LoD BIM integrated design framework for pressurised tunnel: Hydro-mechanical coupling simulation and sustainability assessment Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-17
Feng Xiao, Xilin Chen, Yimo Zhu, Ping Xie, Saeed Salimzadeh, Qian-Bing ZhangWith increasing population growth and rapid urbanisation, humanity faces the urgent challenges of climate change, necessitating transformative actions in the infrastructure and energy sectors to ensure sustainability for future generations. The renewed global emphasis on developing and utilising hydropower, particularly through pumped hydro energy storage (PHES) systems, is pivotal in advancing the
-
Deep learning-based identification of rock discontinuities on 3D model of tunnel face Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-17
Chuyen Pham, Byung-Chan Kim, Hyu-Soung ShinDiscontinuity mapping on tunnel faces is crucial for assessing stability and determining the need for additional reinforcement during tunnel construction. The traditional manual mapping approach is time-consuming and error-prone, necessitating a more accurate and efficient approach. This study explores a novel approach using photogrammetry to reconstruct digital 3D models of tunnel faces, enabling
-
Advancing spatial-temporal rock fracture prediction with virtual camera-based data augmentation Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-17
Jiawei Xie, Baolin Chen, Jinsong Huang, Yuting Zhang, Cheng ZengPredicting rock fractures in unexcavated areas is a critical yet challenging aspect of geotechnical projects. This task involves forecasting the fracture mapping sequences for unexcavated rock faces using the sequences from excavated ones, which is well-suited for spatial–temporal deep learning techniques. Fracture mapping sequences for deep learning model training can be achieved based on field photography
-
Multi-step prediction model enhanced by adaptive denoising and encoder-decoder for shield machine cutterhead torque in complex conditions Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-17
Deming Xu, Yuan Wang, Jingqi Huang, Shujun Xu, Kun ZhouCutterhead torque reflects the obstruction extent of geological environment on the shield machine, and its prediction can assist operators to adjust control parameters to improve construction efficiency and avoid machine jamming. However, tunneling in complex geological or working conditions often results in high cutterhead torque fluctuations and noise, which seriously affects the accuracy of torque
-
Experimental investigation on gush disaster in shield tunnel driven through upper-silt and lower-sand strata Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-17
Chen Liang, Yingchao Wang, Chaofeng Wu, Hemin Zou, Yingchao WangGush disasters are frequent and catastrophic in shield tunnel engineering. Silt and sand are two typical kinds of strata that gush accidents happen frequently. But the investigations concerning silt-sand composite strata are rare. This research focuses on upper-silt and lower-sand strata and adopts a set of self-built experiment system. The dip angle of the strata interface (α) and the slope of the
-
Stability evaluation of the sequential excavation method of large-section double-arch tunnel in fly ash accumulation stratum through physical model Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-17
Tao Yu, Kaichen Ying, Jianfeng Wang, Zhigang Yao, Yong FangThere is no precedent for the construction of large-section double-arch tunnels in fly ash accumulation stratum in China. The fly ash stratum is characterized by a loose structure, poor cementation, and low bearing capacity, which present significant challenges in tunnel design and construction. Based on the Yanpingba tunnel project, this paper conducts a model test on a large-section double-arch tunnel
-
Investigating the mechanical behavior and failure mechanisms of rock bolts subjected to multiple impact loads using a newly developed experimental test apparatus Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-17
Guiyang Yuan, Fuqiang Gao, Jinfu Lou, Jinghe Yang, Shuangyong Dong, Linpo SiUnderstanding the behavior and failure mechanisms of rock bolts subjected to multiple impact loads is essential for improving the safety and performance of underground support systems. In this study, a series of experimental tests were performed to investigate the deformation, energy absorption, and failure mechanisms of pre-tensioned rock bolts under multiple impacts. The result indicates that with
-
Two-scale basalt fibers reinforced concrete shield tunneling segments for underground constructions Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-17
Min Hou, Jiang Feng, Hougai Shi, Ruiyi Jiang, Hengyi Zhu, Hualin FanIn this paper, two-scale Basalt fibers reinforced polymer (BFRP) rebars reinforced arch (BRRA) technique was developed through applying BFRP rebars to macroscopically reinforce concrete shield tunneling segments (STSs). BFRP minibars were mixed into concrete as the micro reinforcements. Six two-scale BRRAs were prepared with content of minibars changing from 0%, 0.5% to 1.5%. Full-scale flexural experiments
-
Real-time forecast of tunnel fire scenario and hazard based on external smoke images Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-17
Jiaqi Cheng, Nie Yang, Saihua Jiang, Caiyi XiongIn tunnel fires, conventional detectors are often obstructed by smoke and heat accumulation, impeding decision-making for firefighting and evacuation efforts. This work proposed a real-time prediction of tunnel fire heat release rate (HRR) and location by using external smoke images and deep learning algorithms. A 100-m tunnel was simulated. By varying fire HRR, location, and fuel type, a database
-
Visualization analysis of potential fracture in overburden strata induced by longwall coal mining Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-17
He Ren, Yishan Pan, Yimin Song, Hao LuoThe condition of overburden strata is a key problem relative to the safety of underground mining activities. However, the invisibility of it poses significant difficulties for on-site monitoring. Accordingly, a multi-indicator visualization analysis method for strata fracture was proposed in this study. Deformation localization features of overburden strata were visualized from the perspective of energy
-
A methodology for evaluating the safety resilience of the existing tunnels induced by foundation pit excavation Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-17
Kaihang Han, Zhiyuan Zhai, Xiangsheng Chen, Chengping Zhang, Jiann-Wen Woody Ju, Xiaohua Bao, Shuying Wang, Beibei HouThe development of multifunctional and three-dimensional underground spaces is an effective approach to expanding human activity spaces in future megacities. It significantly enhances urban carrying capacity, disaster resilience, and robustness, reduces carbon emissions, and promotes harmonious coexistence between humans and nature. A methodology for evaluating the safety resilience of the existing
-
A model test investigation on prestressed anchor cable support for the Haidong fault tunnel Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-15
Zhigang Tao, Xiaotian Lei, Keyuan Liu, Ruixue Zhang, Xiaowei Fan, Mingjiu CaiThe support of fault tunnels is one of the key factors limiting tunnel construction. Prestressed anchor cables are proposed as a new type of support. However, there are few quantitative studies on tunnel excavation failure and support mechanisms. On the basis of the background of the tunnel in the Haidong fault fracture zone of the water diversion project in central Yunnan and using the excavation
-
Research on dynamic fuzzy prediction method for surrounding rock stability of mountain tunnels throughout the construction period Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-15
Furui Dong, Shuhong Wang, Yong Yang, Mingzhu Ren, Meaza Girma Demisa, Rongzhou ZhangThe factors influencing the stability of the surrounding rock are complex and diverse, characterized by fuzziness and variability. This leads to continuous changes in the stability state of the surrounding rock during tunnel construction, posing a significant threat to construction safety. This paper proposes a dynamic fuzzy prediction method for the stability of surrounding rock throughout the entire
-
Large-scale 3D printed model test on seepage distribution in water diversion tunnel and surrounding fractured rock Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-15
Yajian Shao, Guowei Ma, Wei ZhangHydro-geomechanical model test is a prevailing method to study the seepage field in the underground engineering. Most of the existing test models are equivalent continuous medium models, whereas the deeply buried diversion tunnel in rock-matrix with fractures in practical engineering exhibit discontinuities, unevenness and heterogeneousness. To this gap, current study constructs an 1800.0 × 1800.0 × 1800
-
Evaluation of ground movements due to pipe-jacking process of large rectangular structures in soft clays Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-15
Zhongjie Zhang, Ting Deng, Zhenhao Shi, Maosong Huang, Haoran Wang, Xiaoqiang GuPipe jacking method has been increasingly employed in congested urban areas to construct large-scale underground structures (e.g., subway stations), given its advantages in minimizing interventions on adjacent infrastructures. Nevertheless, it remains challenging to assess the associated ground movements. In this work, we form a numerical model for evaluating the ground movements caused by large rectangular
-
Grout diffusion model for single fractures in rock considering influences of grouting pressure and filling rate Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-14
Wenqi Ding, Bo Lei, Chao Duan, Qingzhao ZhangThe processes and effects of grout diffusion in rock fractures are influenced by the grouting parameters, fracture parameters, and external environment. This paper investigates the effects of the grouting pressure and filling rate on grout diffusion based on a theoretical model of Binghamian flow type grout diffusion in a single rough fracture under constant pressure control conditions, using a self-developed
-
Experimental investigation on shield-soil interaction during shield posture adjustment in soft ground Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-14
Hui Jin, Dajun Yuan, Enzhi Wang, Dalong Jin, Xiang ShenShield tunneling in soft soil is prone to losing control of posture and seriously deviating from the designed tunnel axis, which can cause significant ground settlement and tunnel misalignment. This paper develops a large-scale indoor shield tunneling model test platform and conducts shield posture adjustment model tests to examine the interaction between the shield and soft soil. Based on these tests
-
Progressive arching effect and damage evolution process of shallow tunnels with jointed hard rock under overlying loads Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-14
Zhe Qin, Wenlong Liu, Fayu Wu, Weiteng LiThe influence of the arching effect on the loosening pressure in shallow tunnels with jointed hard rock is not clear. In order to solve this problem, the analytical model of loosening pressure in shallow tunnels is modified by considering the role of stress deflection and shear resistance under the arching effect of the stratum based on the traditional analytical model of loosening pressure. Relying
-
Tunneling posture of passive articulated EPB shield in soft soil: A multibody mechanical model-based investigation Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-13
Hui Jin, Dajun Yuan, Enzhi Wang, Dalong Jin, Huixi Liu, Xiang ShenShield tunneling in soft soil is prone to lose control of attitude and seriously deviate from the designed tunnel axis, which causes large tunnel deviation and ground settlement. This paper presents an analytical model that describes the behavior and mechanical mechanism of a passive articulated shield tunneling in soft soil. The model formulates multibody mechanics equation that relate the shield
-
Prediction method of rock spalling risk in large underground cavern excavation based on Bayesian network: A case study from the Baihetan hydropower station, China Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-13
Guo-Feng Liu, Zhi-Qiang Liu, Ding-Ping Xu, Quan JiangProgressive cracking and the resulting rock spalling failure is a common type of disaster in the construction of deep large underground cavern in hard rock, which seriously affects the stability of surrounding rock and construction safety. Relying on the largest hydroelectric underground cavern engineering in the world, i.e. the underground powerhouse at the Baihetan hydropower station located in China
-
A novel A-star algorithm-based approach to predicting the sealant performance of shield tunnel’s gasketed joints Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-13
Jiachong Xie, Neng Wang, Xin Huang, Qinghua Lei, Climent MolinsJoint leakage is one of the major problems for shield tunnels. This paper proposes a novel approach to assessing the sealant performance of gasketed joints based on the A-star search algorithm. By treating the contact surface of gaskets as the search space of the optimal leakage path, the water leakage process is modeled as a path optimization task informed by the nonuniform distribution of contact
-
Mathematical modeling of the cyclical emptying and filling of water distribution system in a deep mine Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-12
Sergey Bublik, Dmitry Olkhovsky, Mikhail Semin, Oleg Parshakov, Artem ZaitsevThis study presents a novel approach to analyzing complex water distribution system within deep mines, focusing on water supply through multiple shafts and the dynamic behavior of water flow. We begin with an initial analysis derived from experimental measurements of flow rates and pressures within the mine’s water distribution system. Observations revealed a cyclical pattern of system emptying and
-
Practical implementation of Bi-Elliptical displacement-controlled method in analysing shallow and large tunnel excavation impact Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-12
Wenhui Yang, Daniela Boldini, Dingwen ZhangThe application of a displacement field at the excavation boundary is a widely used numerical technique for the simulation of induced displacements in the case of TBM tunnelling. Typically, a circular displacement pattern is applied, and the lining is not modelled. However, the effectiveness of this method in simulating the excavation of shallow and large shield tunnels requires further examination
-
Decoupling analysis of inertia effects in tunnel boring machine using a data-physics driven approach Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-10
Yongsheng Li, Limao ZhangTo quantify the “inertia effects” in construction equipment and reduce the time delay and violent disturbance phenomenon, an analysis method based on Support Energy in Generalized Inertia (SEGI) is proposed. In this paper, the theoretical expression of generalized inertia in Electric, Hydraulic, and Mechanical (EHM) systems is analyzed, where an Encoder-Decoder Neural Network (EDNN) model integrating
-
Thermal stress distribution characteristics in high geothermal tunnel Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-10
Pingye Guo, Xin Jin, Mohua Bu, Manchao HeThe deep-buried tunnel has developed rapidly and vigorously in the last decade, and it is essential to address thermal stress issues induced by high geothermal. The temperature differences between the low-temperature tunnel’s inner surface caused by ventilation and the high-temperature initial rock lead to thermal stress, further significantly changing stress distribution characteristics in high geothermal
-
Study on the mechanical behaviors and fracture characteristics of secondary tunnel lining in layered strata Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-10
Xu Chen, Chuan He, Guowen Xu, Bo Wang, Jiamin Du, Gaoyu MaA critical issue encountered during the construction and operation phases of layered rock tunnels is the cracking of the secondary lining caused by asymmetric loading. To address this concern, we conducted an analysis of the asymmetric deformation characteristics and support mechanical behavior in common layered rock tunnels in China. We proposed indicators for asymmetric deformation and support force
-
Consequence and interaction of foaming agent components on soil conditioning of gravel-clay strata for EPB shield tunnelling Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-10
Guixiao Jin, Yao Lu, Jim S. Shiau, Ming Huang, Fengwen Lai, Mengmeng FengSoil conditioning of gravel-clay strata using foams for earth pressure balance (EPB) shield tunnelling is less well understood compared to conditioning for clay or sand strata. This lack of understanding can lead to muck clogging at the cutting wheel and increased wear on cutter tools. To address these issues, this study introduces the response surface methodology (RSM) to investigate the effects of
-
Seismic resilience assessment method for tunnels based on cloud model considering multiple damage evaluation indices Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-10
Jun Shen, Xiaohua Bao, Xiangsheng Chen, Xianlong Wu, Tong Qiu, Hongzhi CuiThe subterranean environment of tunnels poses considerable uncertainty as tunnel structures are ensconced in soil, unlike their above-ground counterparts. This significantly complicates tunnel risk assessment during earthquakes. This study introduces a novel method that integrates multiple damage indices to evaluate the seismic resilience of tunnels. Initially, seismic attenuation is introduced to
-
Evolution law and calculation model of closure time in artificial ground freezing Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-10
Xu Li, Shuang Liu, Xiao-kang Li, Zu-run YueArtificial ground freezing (AGF) is a widely utilized underground support method, with the closure time (tc) of frozen wall being one of the primary concerns. However, the multiple environmental and engineering factors result in complex evolution law and insufficient calculation model of tc. This study conducts a numerical orthogonal test on tc considering eight physical factors, including seepage
-
Experimental study on the tunnel collapse caused by leakage of the shield tail sealing system Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-09
Qihao Sun, Xian Liu, Yihai Bao, Wouter De Corte, Luc TaerweWith the rapid advancement of rail transit, shield tunnels have been extensively constructed worldwide. However, leakage at the shield tail can lead to severe consequences, including shield machine subsidence, structural damage to the tunnel, or even catastrophic tunnel collapse. Research on tunnel collapse induced by shield tail leakage remains in its infancy. The mechanisms underlying such accidents
-
Waterproofing enhancement mechanism of the double sealing gaskets: Experimental test and theoretical analysis Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-09
Hua-Yong Li, Huai-Na Wu, Dong-Lin Feng, Lei Liu, Qing-long Cui, Ren-Peng ChenThe waterproofing system of the double gaskets has been employed in shield tunnels with large diameters (>10 m) and high water pressures (>1.5 MPa), but the waterproof enhancement mechanism of this system has not been clarified. In this study, the enhancement in waterproof performance under the equal and unequal joint openings was analyzed through the waterproofing test. A fluid–solid coupled numerical
-
Grouting diffusion characteristics in rough sandstone fracture with flowing water: Insights from NMR experimental investigation Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-08
Yang Liu, Zhijun Wu, Lei Weng, Longji Wu, Yuan Zhou, Quansheng LiuObservation of dynamic water grouting diffusion characteristics presents formidable challenges owing to the concealed and intricate nature of rock formations in underground engineering. Therefore, investigating the grouting diffusion characteristics in rough fracture with flowing water is crucial for preventing water inrush and reinforcing fractured rock masses. This study conducted a series of dynamic
-
Analytical study on load transfer mechanism of a constant resistance large deformation anchor cable Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-08
Jiawang Zhan, Zhigang Tao, Manchao He, Xiang WangIn this paper, a Macro-NPR anchor cable capable of applying high prestress and providing high constant resistance is proposed, and the load transfer mechanism is analyzed, the constant resistance is provided by the interaction between cone and sleeve. When constant resistance is generated, the outer surface of the sleeve shows an obvious expansion and negative Poisson’s ratio effect. The distributions
-
Lighting environment design evaluation with digital workflow: A life cycle framework for integrating carbon and cost reduction strategies in tunnels Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-08
Liankun Xu, Hehua Zhu, Yi Shen, Jiaxin Ling, Shouzhong FengIn the pursuit of lower carbon footprints on a global scale, tunnel lighting design has become a critical issue, balancing safety, cost-efficiency, and environmental impact. Under such circumstances, tunnel lighting design must integrate multiple considerations, including lighting intensity, cost efficiency, and carbon emissions, while catering to the specific requirements of different project lifecycle
-
The impact of information delivery systems in tunnels depending on lighting intensity and speed limit Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-07
Jaehyuck Lim, Hyunchul Park, Taeho Oh, Inhi KimLimited visibility in tunnels delays accident detection, and the impact of a collision can rapidly escalate throughout the tunnel. This limited visibility highlights the importance of maintaining smooth vehicle interactions through enhanced situational awareness within the tunnel. The difficulties with situational awareness in tunnels can be overcome by lighting the tunnel or providing traffic information
-
Disaster mechanism of shield tunnel under sequential disasters of earthquake and post-earthquake fire Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-01-06
Guobo Wang, Jingchao Wu, Jianning Wang, Zhiguo Yan, Zhongxian LiuSignificant casualties and economic losses can result from a strong earthquake followed by a fire in a shield tunnel. This study employed a numerical thermal–mechanical coupling method, validated with test data, to examine the dynamic response and disaster mechanisms of shield tunnels subjected to seismic events and subsequent fires. The analysis focused on the effects of post-earthquake fires on the