Article
Chemistry, Multidisciplinary
Yimin Wu, Guangzheng Zhuang, Weiming Liang, Le Huang
Summary: This study monitors the stress of steel reinforcement in the secondary lining of the Yulinzi Tunnel and analyzes the temporal variation of steel strain. The variation and distribution characteristics of internal forces are obtained through section force calculation. The safety factor of the structure is evaluated, and it is found that the variation of the safety factor with time conforms to the exponential function. This can be used to predict the future safety factor of the tunnel and evaluate its long-term safety. In addition, numerical simulation provides information on the long-term stress and structural deformation characteristics of the tunnel.
APPLIED SCIENCES-BASEL
(2023)
Article
Energy & Fuels
Abolfazl Tarifard, Peter Gorog, Akos Torok
Summary: This study analyzed the effects of the creep behavior of weak rocks and underground water on the long-term stability of tunnels. The results showed that the induced stresses due to creep behavior and underground water were more significant in the tunnel spring-line. Additionally, an increase in the water table reduced the stability time of the tunnel lining at the fault zone.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2022)
Article
Engineering, Civil
Guowen Xu, Marte Gutierrez
Summary: This paper presents a numerical approach to study the damage evolution of secondary tunnel lining under the combined actions of corrosion of the preliminary support and the creep deformation of the surrounding rock. The improved numerical approach contains three main models, with corresponding failure criteria developed and programmed using FLAC3D's FISH language programming. The validity of the models was verified through investigating the mechanical response of the supporting structures.
TRANSPORTATION GEOTECHNICS
(2021)
Article
Materials Science, Composites
Roham Rafiee, Mohammad Naghi Arabian
Summary: This research focuses on investigating the influence of moisture absorption on the long-term creep behavior of GFRP pipes both experimentally and theoretically. The results show that moisture absorption has a significant impact on the creep behavior of GFRP pipes. Furthermore, a systematic modeling procedure is developed to evaluate the long-term wet-creep response of the GFRP pipes by linking the micro and macro scales.
POLYMER COMPOSITES
(2023)
Article
Construction & Building Technology
Zhanchao Yin, Xiao Zhang, Xianghui Li, Jiaqi Zhang, Qingsong Zhang
Summary: This study investigates the creep behavior of a grouting-reinforced tunnel and proposes an improved nonlinear Burgers model to characterize this behavior. The results show that the creep behavior of the grouting circle significantly affects the tunnel deformation and lining safety.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2022)
Article
Construction & Building Technology
Meho Sasa Kovacevic, Mario Bacic, Mladen Vukomanovic, Anita Ceric
Summary: This paper proposes a framework for automatically calculating the remediation costs of secondary lining cracks, using a multi-phase workflow that combines on-site measurements and advanced numerical modelling tools assisted by a custom-made neural network. The established platform presents a step forward in proactive estimation of the secondary lining remediation costs, continuously enhancing estimates of crack repair costs for tunnel managers.
AUTOMATION IN CONSTRUCTION
(2021)
Article
Construction & Building Technology
Jiaqi Chang, Hongwei Huang, Dongming Zhang, Huiming Wu, Jingya Yan
Summary: This article presents a case study on the real-time monitoring of the deformation of a constructing shield tunnel in Shanghai using a wireless sensor network (WSN). The study reveals two deformation modes, rotation and ovalization, of the tunnel ring during construction, and analyzes the factors influencing these modes.
STRUCTURAL CONTROL & HEALTH MONITORING
(2022)
Article
Engineering, Geological
Cheng Lyu, Jianfeng Liu, Yi Ren, Chao Liang, Yilin Liao
Summary: By conducting long-term uniaxial creep tests and introducing a nonlinear damage body, a new nonlinear creep-damage constitutive model was proposed to accurately predict the long-term deformation of salt caverns. The fitting function obtained from experimental data at different times revealed that the presented model best characterizes the creep evolution characteristics of salt rock. The longer the test duration, the more accurate the predicted results for the salt storage caverns.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2021)
Article
Green & Sustainable Science & Technology
Chenglin Li, Guozhu Zhang, Suguang Xiao, Yongli Xie, Xiaohua Liu, Shiding Cao
Summary: The application of traditional borehole ground heat exchangers is limited in tropical zones due to thermal imbalances. Tunnel-lining ground heat exchangers, which utilize tunnel ventilation, show potential for application in tropical zones. A heat transfer model was built to investigate the effects of tunnel ventilation on thermal imbalance, and the feasibility of tunnel-lining ground heat exchangers was analyzed. The results indicate that tunnel-lining ground heat exchangers effectively reduce the influence of thermal imbalance in the tropics of China.
Article
Construction & Building Technology
W. M. Huang, J. C. Wang, Z. X. Yang, R. Q. Xu
Summary: An analytical model was established for segmental lining behavior, incorporating curved beam modeling, tensionless foundation interaction, and nonlinear rotational springs. The proposed method, using state space and Newton-Steffensen iterative procedure, showed convenience and accuracy in considering lining-soil interaction and nonlinear joint behavior, offering an alternative approach for design and analysis. A parametric study revealed the influences of soil resistance coefficient and cross-sectional properties on the mechanical behavior of the lining, showcasing the effectiveness of the new method.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Yaqiong Wang, Yong Liu, Zhi-Feng Wang, Xue Zhang, Yingchao Hui, Jianchong Li
Summary: This paper studied the progressive failure process of tunnel lining induced by surrounding rock creep effect through time-dependent numerical simulation. The research found that the creep effect of weak rock affects the long-term stability and progressive failure mode of tunnel lining.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Civil
Chang Liu, Dingli Zhang, Sulei Zhang, Qian Fang, Zhenyu Sun
Summary: The rock load on lining structures of tunnels buried in rheological rock increases over time, and the deterioration of primary lining is common due to its structural characteristics and service environment attack. These delayed effects affect the mechanical response of tunnels, but they have not received enough attention in long-term stability assessment of tunnel structures. This paper proposes an analytical approach to investigate the long-term mechanical response of tunnel structures in rheological rock influenced by the degradation of the primary lining. The results reveal the importance of considering the primary lining in long-term safety assessment of operation tunnels.
Article
Engineering, Civil
Majid Mirzaeiabdolyousefi, Majid Nikkhah, Shokrollah Zare
Summary: This paper investigates the time-dependent behavior of squeezing phenomenon in a large cross-section tunnel and its impact on lining stability using numerical analysis. The study highlights the importance of considering the time-dependent behavior in tunnel design and construction, as the structural forces in the concrete lining increase over time and can lead to instability. Evaluating different models further emphasizes the significance of accounting for rock's time-dependent behavior.
GEOMECHANICS AND ENGINEERING
(2022)
Article
Engineering, Mechanical
Guowen Xu, Bo Wang, Gaoyu Ma, Jiamin Du, Xu Chen, Zhenkun Hou
Summary: This article investigates the occurrence of cracks in the secondary tunnel lining and its adverse effects on the long-term safety of tunnels through model tests and numerical simulations. The results show that the overloading method can effectively simulate the failure evolution process of the lining, and the presence of voids accelerates the failure process of the lining.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Mechanical
Shimin Wang, Ya Wang, Zhiyu Lin, Zihan Song, Xianming Wang, Xiaoyu Peng
Summary: This study uses the Rail-cum-Road Yangtze River Cross Tunnel in Wuhan as an example to reveal the deformation distribution, internal force characteristics, and failure process of the double-layer lining structure caused by insufficient thickness in the vault of the segment's secondary lining through model testing.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Geological
Ziquan Chen, Chuan He, Gaoyu Ma, Guowen Xu, Chunchi Ma
ROCK MECHANICS AND ROCK ENGINEERING
(2019)
Article
Engineering, Environmental
Guowen Xu, Chuan He, Xin Wang
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2020)
Article
Construction & Building Technology
Xiong-Yu Hu, Chuan He, Xiao-Hui Lai, Gabriel Walton, Guo-Wen Xu
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2020)
Article
Engineering, Geological
Guowen Xu, Marte Gutierrez, Chuan He, Wei Meng
Article
Engineering, Environmental
Guowen Xu, Chuan He, Jun Wang, Junbo Zhang
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2020)
Article
Engineering, Environmental
Ziquan Chen, Chuan He, Wenbo Yang, Wenqi Guo, Zheng Li, Guowen Xu
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2020)
Article
Computer Science, Interdisciplinary Applications
Hongwei Fang, Yohchia Frank Chen, Zhenkun Hou, Guowen Xu, Jianxun Wu
COMPUTERS AND GEOTECHNICS
(2020)
Article
Engineering, Geological
Guowen Xu, Chuan He, Jun Wang, Ziquan Chen
ROCK MECHANICS AND ROCK ENGINEERING
(2020)
Article
Engineering, Mechanical
Guowen Xu, Chuan He, Ziquan Chen, Chuankun Liu, Bo Wang, Yulin Zou
ENGINEERING FAILURE ANALYSIS
(2020)
Article
Engineering, Geological
Hongwei Fang, Yohchia Frank Chen, Guowen Xu, Zhenkun Hou, Jianxun Wu
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2020)
Article
Engineering, Geological
Guowen Xu, Chuan He, Ziquan Chen, Qinghao Yang
ENGINEERING GEOLOGY
(2020)
Article
Engineering, Mechanical
Zhengshu He, Chuan He, Gaoyu Ma, Wenbo Yang, Guowen Xu
Summary: This study presents a novel approach to estimate the structural performance of a deteriorated reinforced concrete shield tunnel, with a focus on the spatial correlation and variation of steel corrosion. A random field integrated with Gumbel model is used to simulate the nonuniform steel corrosion. Numerical and analytical models are developed to evaluate the load-bearing capacity of a corroded RC segment. Monte Carlo simulation is performed to estimate the failure probability of a deteriorated RC shield tunnel. An illustrative example investigates the effects of corrosion degree and nonuniformity of steel reinforcements on the structural performance.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Civil
Hongwei Fang, Yixiang Xu, Guowen Xu
Summary: The seismic slip line field theory (SLFT) is derived based on the method of characteristic, and the critical slope contour calculated by the SLFT is a convex shape when a high surcharge is imposed on the slope top surface. A simple and robustness failure mechanism is proposed to calculate the static and seismic ultimate bearing capacity of strip footing adjacent to the cohesion-frictional slopes where the critical slope contour shifts from the inside of the slope to the outside of the slope with the increase of the boundary load, and the slope is at the limit state when the critical slope contour is tangent to the slope surface. The influence of slope and footing geometric features, soil parameters, and the seismic load on the bearing capacity is analyzed. The ultimate bearing capacity decreases as the strength parameters decreases, and the slope angle and the seismic coefficient increases. The static and seismic bearing capacity calculated by the proposed method does not require the failure models to be initially assumed, and the results are consistent with those of the other methods.
KSCE JOURNAL OF CIVIL ENGINEERING
(2023)
Article
Engineering, Mechanical
Jiamin Du, Yueheng Shu, Guowen Xu, Chuan He, Chaofan Yao
Summary: This study used statical analysis, similarity model tests and numerical simulations to investigate the influence of geo-stress field on the evolution of lining cracks in soft rock tunnels. The results showed that circumferential crack was the most common type, followed by longitudinal, oblique, and reticulate cracks. The location and length of cracks were affected by the direction of the maximum principal stress. The stress redistribution and fracture pattern of the lining were more complex for larger cross-sectional areas. The study provides valuable insights for the structural design of secondary lining under different geo-stress fields.
ENGINEERING FAILURE ANALYSIS
(2023)
