Article
Engineering, Geological
Hongbin Chen, Xinhua You, Dajun Yuan, Yang Ping
Summary: A multi-purpose prototype test system is developed to study the mechanical behavior of tunnel supporting structure. This system includes a modular counterforce device, a powerful loading equipment, an advanced intelligent management system, and an efficient noncontact deformation measurement system. The case application proves that the prototype test system can reproduce the mechanical behavior of the tunnel lining in detail during load-bearing, deformation, and failure processes.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2023)
Article
Construction & Building Technology
Yiguo Xue, Binghua Zhou, Shucai Li, Daohong Qiu, Kai Zhang, Huimin Gong
Summary: The study investigated the characteristics of tunnel displacement, stress, and seepage in the construction process of subsea tunnel crossing weathered trough. It found that after subsea tunnel excavation, the surrounding rocks exhibited similar displacement, stress, and hydraulic pressure distribution, with stress release and lower hydraulic pressure often accompanying displacement growth. Multiple-physical monitoring information was found to be interactive.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Article
Construction & Building Technology
Zhen Huang, Hai-Wen Bai, Shao-Kun Ma, Jia-Wei Zhang, Yi-Miao Chen, Hong-Zhou Li
Summary: This study investigates the mechanical properties of jointed prefabricated tunnels with and without bolts under static loading through large-scale physical model tests. Strain, opening amount, deflection, rotation angle, toughness, and ductility of joint concrete and steel are considered. The failure of both types of joints are quantitatively analyzed using virtual hinge angle and plasticity index. The results are compared with a finite element model, evaluating the effects of axial force and bolt preload on joint performance.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Construction & Building Technology
Ben-Guo He, Rui-Hua Xue, Zhi-Qiang Zhang, Xia-Ting Feng, Chuan Wu
Summary: The mechanical behavior of tunnel linings is crucial for tunnel design, especially those under high external water pressure. A novel method using mechanical equivalency principle is proposed to impose water pressure on a tunnel lining. A purpose-built device is manufactured to simulate external water pressure on a horseshoe-shaped tunnel lining, avoiding sudden disintegration of the lining material that may occur during testing with actual water. The proposed methodology is verified through finite element (FE) numerical modeling by comparing bending moments, thrusts, and shear forces.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Construction & Building Technology
Qiangbing Huang, Yuxuan Gou, Liming Xue, Yi Yuan, Bo Yang, Jianbing Peng
Summary: This paper conducted a model test and numerical simulation of a metro tunnel crossing a land subsidence area in Xi'an, China, analyzing the mechanical response of the tunnel and the deformation and failure characteristics of the lining. The results showed that the tunnel exhibits downward flexural deformation in the middle, slight warpage on both ends in the longitudinal direction, and local torsion in the horizontal direction in the presence of land subsidence. The paper also proposed countermeasures and suggestions to mitigate the adverse impacts of land subsidence on metro tunnels.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Construction & Building Technology
Shiqi Wang, Liuxu Fu, Xianhua Chen, Minghui Gong, Zijia Xiong, Jinxiang Hong
Summary: This paper investigates the failure characteristics of cement grouted asphalt mixture (CGAM) under different loads through three types of tests with acoustic emission monitoring. The results indicate that the failure process of CGAM can be divided into three stages, with large damage occurring in short periods. Cracking in the cement mesh is a main factor leading to cracks in CGAM, and its brittleness results in a higher proportion of macro cracks compared to stone matrix asphalt (SMA). The proportion of shear failure is also higher in CGAM, highlighting the need for improved shear resistance in material design.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Jiawu Li, Peng Wu, Jianming Hao, Hui Pan
Summary: This study investigates the characteristics of vertical vortex-induced vibration (VIV) and the effects of vibration mitigation measures on an H-shaped bridge deck through experiments and numerical simulations. The results show that the vibration mitigation effect is less sensitive to the position of the measures in the first vortex lock-in region, but more sensitive in the second lock-in region. The phase relationship between aerodynamic lift and displacement response varies in different regions, indicating different vortex structures.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2022)
Article
Engineering, Mechanical
Hanyuan Li, Xinggao Li, Hao Liu
Summary: Numerous studies have shown that tunnels are vulnerable to damage due to fault dislocation. Model tests with a geometric similarity ratio of 1:25 were carried out to investigate the deformation response and structural failure mechanism of metro shield tunnels subjected to faulting. The influence of fault dislocation on the tunnel was analyzed, and the deformation of segmental lining and circumferential joints, earth pressure, and strain evolution were investigated.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Mechanical
Hanxiang Liu, Hongwen Jing, Qian Yin, Yaoyao Meng, Gaofang Zhu
Summary: An experimental test was conducted to study the influence of bedding planes on mechanical properties and failure characteristics of rock-like specimens. It was found that the increase in bedding angle led to a decrease and then an increase in uniaxial compression strength and failure strain. The presence of bedding planes also changed the failure mode and fracture process of the specimens. Numerical models confirmed the effects of orientation angle, spacing, and strength of bedding planes on the failure characteristics.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Xiaohan Li, Zheming Zhu, Meng Wang, Dingjun Xiao, Yun Shu, Shuai Deng
Summary: The existence of cracks in fractured rock masses significantly affects the stability of tunnels under dynamic disturbances. Research on tunnel fracture mechanisms under blasting stress waves with interconnected cracks shows that these cracks have an important influence on the dynamic response of tunnels. The stress distribution and fracture modes around the tunnel are significantly changed due to the existence of interconnected cracks.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Engineering, Civil
Kailun Zhang, Airong Liu, Jiyang Fu, Yonghui Huang, Jie Yang, Yuguo Yu, Mao Ye, Zhicheng Yang, Zixiang Zhang
Summary: In this study, a shaking table test was conducted to investigate the seismic performance of a new special-shaped arch bridge (BIACB). The test results showed significant differences in the transverse and vertical responses of the bridge, with the transverse response being greater than the vertical response. The inclined arch also amplifies the impact of vertical seismic excitation on the bridge. These findings have important implications for the seismic design of similar bridges.
ENGINEERING STRUCTURES
(2023)
Article
Physics, Multidisciplinary
Xiaojian Cao, Han Zhang, Jun Yu, Tianchong Yu, Yuxing Qing
Summary: This study presents experimental results of sandstone containing pre-existing cracks under Brazilian compression, revealing the significant anisotropic characteristic of this type of rock. The rock exhibits the minimum tensile strength and weakest axial deformation resistance when the crack inclination is at 45 degrees.
FRONTIERS IN PHYSICS
(2021)
Article
Engineering, Mechanical
Peng Ying, Xiaohan Li, Ruihe Zhou, Weiting Gao, Xibin Li, Zheming Zhu
Summary: In this study, the impact of tunnel backfilling on crack propagation behavior was investigated through experiments and simulations. The results showed that tunnel backfilling does not affect the crack propagation path, but has a significant influence on crack propagation speed and fracture toughness.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Construction & Building Technology
Xun Liu, Kun Feng, Chuan He, Lixiang Zhao
Summary: This study conducted a full-scale test to analyze the effects of reinforcement measures on the dislocation and joint opening between shield tunnel rings, as well as the failure mechanism and crack development of the structure. The results showed that structural deformation experiences linear and nonlinear increases, with the deformation between rings initially manifesting as dislocation, and cracks appearing in the segmental linings after reinforcement.
STRUCTURAL CONCRETE
(2022)
Article
Chemistry, Multidisciplinary
Yanwei Duan, Guohua Zhang, Tao Qin
Summary: This research simulated the failure process of rock mass caused by unloading through triaxial unloading confining pressure tests, analyzed the crack-characteristic stress, and studied the energy evolution of rock under unloading. The results showed that confining pressure greatly affected the crack closure stress and crack initiation stress. The energy characteristic parameters gradually increased with the increase in confining pressure, and the release process of releasable elastic energy after the peak stress exhibited a significant confining pressure effect.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Geological
Shuaifeng Wang, Zixin Zhang, Xin Huang, Qinghua Lei
Summary: The paper proposes a Generalized Block Theory (GBT) to evaluate the stability of blocky rock masses during seismic activities, considering time-varying seismic loads. Results show that seismic loads significantly affect the stability and kinematics of rock blocks during earthquakes, with both P-u and V-u decaying following an inverse power law trend with epicentral distance.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Construction & Building Technology
Zixin Zhang, Wei Liu, Xin Huang, Shuaifeng Wang
Summary: This study investigates the mechanical behavior of staggeredly fabricated water storage and sewage tunnel using 3D finite element modeling. The study finds that the internal force transmission mechanism in the tunnel is beneficial for deformation control and provides recommendations for practical design and construction.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Miaoyuan Tang, Xin Huang, Shuaifeng Wang, Yixin Zhai, Qianwei Zhuang, Chi Zhang
Summary: This study explores the rock breaking mechanism and cutter-rock interaction during TBM tunneling through simulated cutting experiments. The results show that the distribution of bond breaks and contact stress is related to the penetration depth, while the side force is related to the cutting radius. The cracking features of mudstone are different from hard rocks.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Engineering, Mechanical
Zixin Zhang, Jiayu Li, Shuaifeng Wang, Xin Huang
Summary: This paper provides an in-depth comparison and evaluation of design plans for the construction of Zizhi Tunnel, with a focus on soil reinforcement. The study finds that the stability of the advance core plays a crucial role in the success of tunnel excavation in soft soil.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Geological
Shuaifeng Wang, Zixin Zhang, Xin Huang, Qinghua Lei
Summary: The arrival behavior of elastic waves in naturally fractured rocks is investigated through numerical simulations. The study reveals that the angular frequency and fracture stiffness fundamentally control the arrival behavior of waves in the fractured rock. Moreover, the interaction between waves and fractures results in an asynchronous arrival phenomenon of wave energy. The study also identifies two distinct regimes based on the dependency of fractal dimension on the dimensionless angular frequency.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Engineering, Geological
Junpeng Wang, Xin Huang, Jun Xu, Zixin Zhang, Shuaifeng Wang, Yun Li
Summary: This paper uses computed tomography (CT) scanning technology and pore network modeling to obtain the pore structure information of two types of coral reef limestones with different pore characteristics. The results show that the pore network of coral reef limestones has a short seepage distance, strong connectivity, and exhibits a clustering effect. The analysis of key pore nodes indicates that a few pore nodes have extremely high centrality. A preferential seepage path characterized by more intensive shortest percolated paths is found in the coral reef limestone pore network. A new indicator VB considering both the volume and betweenness centrality of pore nodes is proposed.
ENGINEERING GEOLOGY
(2023)
Article
Engineering, Civil
Jiachong Xie, Xin Huang, Zixin Zhang, Guolong Jin
Summary: This paper presents a new approach for simulating the localized leakage behavior of segmentally lined tunnels based on a cohesive zone model. It captures both the localized leakage at the lining segment and the hydromechanically coupled seepage behavior at the segmental joints. The proposed approach is verified via a tunnel drainage experiment and yields more accurate results than the existing methods. It is computationally efficient and stable. The paper also highlights the effects of aperture size, stratum permeability, and spatial distribution of drainage holes on the leakage behavior and seepage field, as well as the importance of employing the hydromechanical coupled mechanism at the segment joints.
FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING
(2023)
Article
Engineering, Ocean
Junpeng Wang, Xin Huang, Jun Xu, Shuaifeng Wang, Guolong Jin, Zixin Zhang
Summary: This study used CT scanning technology, 3D visualization reconstruction, and pore identification algorithms to obtain the pore structure information of two coral reef limestone specimens. The study found that the pore structure of coral reef limestone has obvious directionality and influences its permeability. The results emphasize the importance of considering structural anisotropy when interpreting the properties of coral reef limestone.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2023)
Article
Engineering, Geological
Wenbo Pan, Zixin Zhang, Shuaifeng Wang, Qinghua Lei
Summary: In this study, a seismo-hydro-mechanical simulation was conducted to analyze the impact of earthquakes on the hydrogeological properties of a nuclear waste repository. The simulation results showed that the changes in fracture transmissivity induced by earthquakes follow a power-law decay.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2023)
Article
Engineering, Civil
Yeting Zhu, Yanfei Zhu, Elton J. Chen, Yixin Zhai, Rui Min, Bin Tang, Xin Huang
Summary: A synchronous shield tunnelling technology combining advancement and segment fabrication was proposed through the active control of shield thrust system oil pressures. The feasibility and reliability of this technology were evaluated through a large model test platform, with the Shanghai Airport Railway Link Line tunnelling project serving as a demonstration project. The effectiveness of the proposed method and its benefits for future long-distance tunnelling projects were discussed.
Article
Engineering, Civil
Qihang Xu, Xin Huang, Baogang Zhang, Zixin Zhang, Junhua Wang, Shuaifeng Wang
Summary: In this paper, a hybrid intelligent model based on long short-term memory (LSTM) is developed to accurately predict the performance of tunnel boring machines (TBMs) in tunneling projects. The model combines various layers and techniques to process raw data and improve the fitting quality. It is validated using a large monitoring database from a TBM project in Shenzhen, China. The results show that historical output prediction has the greatest influence on prediction accuracy, followed by ground properties. The model can provide guidance for construction personnel to adjust operational parameters based on predicted TBM performance.
Article
Construction & Building Technology
Zhi Ding, Xiao Zhang, Shao-Heng He, Yong-Jie Qi, Cun-Gang Lin
Summary: This study investigates the longitudinal behavior of a shield tunnel by designing and constructing a reduced-size indoor model. The results show that the longitudinal settlement of the tunnel follows a normal distribution, with the maximum settlement occurring at the central ring and increasing linearly with the applied load. Stress concentration typically occurs on the side of the tunnel waist under surcharge, resulting in transverse elliptical deformation of the entire structure.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Lucia Lopez-de-Abajo, Marcos G. Alberti, Jaime C. Galvez
Summary: Assessing and predicting concrete damage is crucial for infrastructure management. This study quantifies gas concentrations in urban tunnels to achieve this goal.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Chao He, Yinghao Cai, Chenqiang Pu, Shunhua Zhou, Honggui Di, Xiaohui Zhang
Summary: This paper investigates the impact of river channel excavation on adjacent metro tunnels and proposes protective measures based on an engineering project in Fuzhou, China. A three-dimensional finite element model is developed to calculate the displacements and distortion of tunnels under different excavation sequences and soil reinforcement measures. Real-time monitoring confirms that the vertical displacements and diametrical distortion of tunnels are primarily caused by the excavation of the river above the tunnels, while horizontal displacements are induced by the excavation next to the tunnels. The study recommends a combination of cement slurry with a portal form and concrete with a plate form for soil reinforcement and tunnel protection.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Yaosheng Liu, Ang Li, Feng Dai, Ruochen Jiang, Yi Liu, Rui Chen
Summary: In this study, a hybrid model based on a multilayer perceptron (MLP) and meta-heuristic algorithms was developed to improve blast performance during tunnel excavation. Precise prediction of post-blasting indicators was important for optimization, and a comparison of meta-heuristic algorithms was conducted to find the most suitable model. The results showed that the developed model effectively reduces overbreak areas and quantitatively analyzes the influence of geological conditions.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Xiang Shen, Yifan Chen, Liqiang Cao, Xiangsheng Chen, Yanbin Fu, Chengyu Hong
Summary: In this paper, a machine learning-based method for predicting the slurry pressure in shield tunnel construction is proposed. By considering the influence of fault fracture zones and setting the formation influence coefficient, the accuracy of the prediction is significantly improved.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Shuying Wang, Zihao Zhou, Xiangcou Zheng, Jiazheng Zhong, Tengyue Zheng, Changhao Qi
Summary: A real-time assessment and monitoring approach based on laser scanning technology and point cloud data analysis was proposed to address the hysteresis in assessing the workability of conditioned soils and the inefficiency in estimating the soil volume flow rate in tunnelling practice. The approach was successfully applied in identifying the workability of conditioned soil and its discharge rate in the EPB shield tunnelling project.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Peng Jiang, Benchao Liu, Yuting Tang, Zhengyu Liu, Yonghao Pang
Summary: This study introduces a novel deep learning-based electrical method that jointly inverses resistivity and chargeability to estimate water-bearing structures and water volume. Compared with traditional linear inversion methods, the proposed method demonstrates superiority in locating and delineating anomalous bodies, reducing solution multiplicity.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Haoyu Mao, Nuwen Xu, Zhong Zhou, Chun Sha, Peiwei Xiao, Biao Li
Summary: The study focuses on the delineation of rock mass damage zones and stability analysis of underground powerhouse in Lianghekou hydropower station. ESG monitoring system is used to monitor the inner micro-fracture activity of surrounding rock mass in real-time. Engineering analogy method is adopted to forecast the deformation period of surrounding rock mass and analyze the variation characteristics of seismic source parameters. The research results provide references for similar deep underground excavation engineering in terms of design and construction.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Junling Qiu, Dedi Liu, Kai Zhao, Jinxing Lai, Xiuling Wang, Zhichao Wang, Tong Liu
Summary: This study focuses on the construction surface cracks of large cross-section tunnels in loess strata of China. The mechanism of surface crack formation is analyzed, and factors such as settlement deformation, construction scheme, and surrounding soil environment are identified as the main contributors. Numerical simulations were conducted to gain a deeper understanding of the influence of factors on surface cracks in loess tunnel construction. Specific measures for prevention and treatment of construction surface cracks are proposed to provide new ideas for surface crack control in loess tunnels.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Ting Shang, Jiaxin Lu, Ying Luo, Song Wang, Zhengyu He, Aobo Wang
Summary: The study reveals significant variations in car-following behavior across different types of tunnels and consecutive sections of the same tunnel. As tunnel length increases, the driving stability of following vehicles decreases, but the level of driving safety risk is not positively correlated with tunnel length. Significant vehicle trajectory oscillation is observed within the inner sections of long and extra-long tunnels, and a significant relationship between the acceleration of following vehicles and the location within the tunnel section is found.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Rusi Zeng, Zhongwei Shen, Jun Luo
Summary: The urban underground complexes (UUCs) in China have been effective in solving urban problems, but users have expressed dissatisfaction with the internal physical environment. Personal characteristics and environmental factors play significant roles in determining users' satisfaction.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Gabriel Lehmann, Heiko Kaeling, Sebastian Hoch, Kurosch Thuro
Summary: Analysing and predicting the advance rate of a tunnel boring machine (TBM) in hard rock is important for tunnelling projects. This study focuses on small-diameter TBMs and their unique characteristics, such as insufficient geotechnical information and special machine designs. A database of 37 projects with 70 geotechnically homogeneous areas is compiled to investigate the performance of small-diameter TBMs. The analysis shows that segment lining TBMs have higher penetration rates, and new approaches for the penetration prediction of pipe jacking machines in hard rock are proposed.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Ting Ren, Ming Qiao, Jon Roberts, Jennifer Hines, Yang-Wai Chow, Wei Zong, Adrian Sugden, Mark Shepherd, Matthew Farrelly, Gareth Kennedy, Faisal Hai, Willy Susilo
Summary: Long-term exposure to coal and silica dust during underground tunnelling operations is a growing concern. To bridge the gap between knowledge in dust exposure monitoring and frontline workers, a virtual reality educational tool was developed to visualize ventilation and dust flow characteristics. This tool allows workers to better understand decision-making and best practices for dust controls.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Dong Lin, Zhipeng Zhou, Miaocheng Weng, Wout Broere, Jianqiang Cui
Summary: Metro systems play a vital role in the transportation, economic, environmental and social aspects of cities. The uncertainties in construction, passenger comfort and safety, as well as efficiency and reliability of the metro system, have been widely studied. Metro systems influence urban development and have a positive impact on housing prices, public health, and environmental quality. Further research is needed to fill the research gaps and make recommendations for future studies.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Construction & Building Technology
Wei Yu, Bo Wang, Xin Zi, Jie Dong
Summary: In this study, a whole-process analytical theory for the coupled deformation of deep circular tunnel surrounding rock and prestressed yielding anchor bolt (cable) system is derived and validated through numerical simulations. The results show that anchor bolts (cables) can significantly reduce the convergence of surrounding rock, and factors such as support timing and anchor cable length have important effects on the support effectiveness.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
