Article
Metallurgy & Metallurgical Engineering
Feng Guang-liang, Chen Bing-rui, Jiang Quan, Xiao Ya-xun, Niu Wen-jing, Li Peng-xiang
Summary: The study on excavation-induced microseismicity and rockburst occurrence in deep underground projects indicates the importance of these events in warning and analyzing rockburst occurrences. Differences in microseismicity and rockburst characteristics were found between parallel tunnels with different lithological conditions, emphasizing the complexity of predicting such events in deep tunnel projects.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2021)
Article
Construction & Building Technology
Peng -Xiang Li, Bing-Rui Chen, Ya-Xun Xiao, Guang-Liang Feng, Yang-Yi Zhou, Jin-Shuai Zhao
Summary: Reasonable tunnel spacing is crucial in deeply buried tunnels to reduce the risk of rockburst occurrence. A study was conducted to investigate the effects of tunnel spacing on rockburst and microseismic activity during TBM excavation. It was found that increasing the spacing between twin tunnels significantly decreased rockburst frequency and microseismic radiated energy.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Wenjing Niu, Xia-Ting Feng, Guangliang Feng, Yaxun Xiao, Zhibin Yao, Wei Zhang, Lei Hu
Summary: Rockbursts are complex dynamic engineering failures encountered in deep tunnels, and microseismic warning and safety control can reduce the damage and occurrence of rockburst failures. This study analyzes the behavior and microseismicity of rockbursts of different intensities, clarifies the factors and causes for rockburst warning, and establishes a method for selecting microseismic information for rockburst warning. The proposed method has been successfully applied in a tunnel for rockburst warning, effectively identifying over 85% of rockburst hazards.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Civil
Shaokun Ma, Jinmei Li, Zhuofeng Li
Summary: This paper investigates the critical support pressure in soft-hard mixed strata during shield tunneling. Using three-dimensional finite element models, the study finds that ground surface settlement and lateral soil displacement are sensitive to changes in support pressure. The research results have significant implications for ensuring the stability of the excavation face and minimizing the impact on the surrounding environment caused by shield tunnel excavation.
TRANSPORTATION GEOTECHNICS
(2022)
Article
Construction & Building Technology
Chang Liu, Sulei Zhang, Dingli Zhang, Kunpeng Zhang, Zhengzhong Wang
Summary: The collapse mechanism of shallow subway tunnels in soft upper and hard lower composite strata has been investigated through scaled model tests, revealing that the thickness of the hard lower layer significantly influences the stress distribution and collapse process of the composite strata. Increasing the thickness of the hard lower layer improves the stability and bearing capacity of the composite strata.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Guo-Feng Liu, Quan Jiang, Guang-Liang Feng, Dong-Fang Chen, Bing-Rui Chen, Zhou-Neng Zhao
Summary: This study proposed a method for early estimation of rockburst occurrence and scale based on microseismicity, using an established rockburst database, selection of typical rockburst samples, training of an artificial neural network (ANN) model, and dynamic updating. The method demonstrated reliable estimation of rockburst cases in drill-and-blast tunneling, providing a new approach for risk assessment and management.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Xiao Zhang, Qilong Song, Zhanhu Yao, Dong Su, Yazhou Zhang, Qiang Li
Summary: This study focuses on the stability of tunnel face in composite strata, specifically the soft upper and hard lower condition. By conducting numerical simulations and establishing a limit equilibrium model, the impact of different soft-hard ratios (SA) on the limit support pressure is investigated. The findings indicate that the deformation in the event of tunnel face instability mainly occurs in the soft soil layer, with less noticeable deformation in the hard rock layer. The study also reveals a linear decrease in the limit support pressure ratio with decreasing SA. The truncated log-spiral model (TLSM) shows higher agreement with the numerical simulation results compared to other models, especially in the range of SA = 0.25 to 1.0.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Environmental
Lei Hu, Xia-Ting Feng, Zhi-Bin Yao, Wei Zhang, Wen-Jing Niu, Xin Bi, Guang-Liang Feng, Ya-Xun Xiao
Summary: This article proposes a rockburst time warning method based on microseismic monitoring and the blasting cycle as the unit of time. The developed models achieve accuracies of approximately 74.6%, 71.2%, and 63.1% for predicting rockburst occurrence in subsequent blasting cycles in a railway tunnel excavation. This combination of MS monitoring and artificial intelligence provides a new approach for rockburst time warning.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Geosciences, Multidisciplinary
Tian-hui Ma, Chun-an Tang, Fei Liu, Shi-chao Zhang, Zhi-qiang Feng
Summary: Rockburst hazard is a significant issue in deep rock mechanics, and can be effectively monitored and controlled through methods such as microseismic monitoring and numerical simulation. This approach has been successfully applied in deep underground engineering projects to reduce the incidence of rockburst events.
GEOMATICS NATURAL HAZARDS & RISK
(2021)
Article
Chemistry, Multidisciplinary
Ying Guo, Caiping Lu, Zhilong He, Jiefang Song
Summary: Through numerical simulations and field observations, the laws and influencing factors of stress, deformation, fracture and energy caused by large energy mining-induced tremors are revealed. The main conclusions include the distribution of stress and failure types, the influence of goaf formation, and the release of energy from shear failure. These research findings have guiding significance for rockburst prevention in coal mines with thick-hard strata roofs.
APPLIED SCIENCES-BASEL
(2022)
Article
Construction & Building Technology
Jianbing Lv, Dijin Lin, Weijun Wu, Juan Huang, Zikun Li, Helin Fu, Hongzhong Li
Summary: This study investigated the impact of shield tunnel passing through existing bridge pile foundations in upper-soft and lower-hard composite strata, analyzing the surface subsidence and mechanical responses of a single pile. Additional stresses generated by existing bridge piles in the soil were considered, leading to proposed allowable values to evaluate construction disturbances. The study provides insights into deformation control caused by shield underpassing structures in complex geological conditions.
Article
Engineering, Geological
Jun Hu, Shaobo Chai, Hongchao Wang, Jian Chen, Xiaodong Fu, Yongqiang Zhou
Summary: This study develops a three-dimensional refined numerical calculation model for shield tunnels under complex geological conditions, considering the effects of a staggered assembly of the tunnel, bolts between segments, and the strata-tunnel interface. The longitudinal mechanical properties of shield tunnels crossing different strata are analyzed, and the influence of the elastic modulus difference between soft and hard strata on the tunnel's behavior is explored. The findings highlight the importance of considering the discontinuity and inhomogeneity in the strata for accurately assessing the performance of shield tunnels.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2023)
Article
Geosciences, Multidisciplinary
Tianhui Ma, Daoyuan Lin, Liexian Tang, Limin Li, Chun'an Tang, Kedar Prasad Yadav, Wendong Jin
Summary: This study conducted in-depth records and analysis of the geological and rockburst data of the Qinling Water Tunnel. It proposed a rockburst tendency criterion, utilized microseismic monitoring technology for rockburst monitoring and early warning, and compared the results with statistical data to find a high accuracy in rockburst prediction.
GEOMATICS NATURAL HAZARDS & RISK
(2022)
Article
Engineering, Civil
Tingjin Liu, Shuyi Zhang, Yongfeng Tang, Zhenwei Ye
Summary: This study investigates the longitudinal behavior and failure pattern of shield tunnels, as well as the reinforcement mechanism of longitudinal channel steel. The results show that reinforcement can improve the longitudinal deformation of shield tunnels and reduce the load at which damage occurs.
KSCE JOURNAL OF CIVIL ENGINEERING
(2023)
Article
Geochemistry & Geophysics
Jianbin Cui, Liangfu Xie, Yongjun Qin, Xuejun Liu, Wei Qiao, Zeyu Hu, Liming Wu, Liewang Qiu, Ke Huang
Summary: This study investigates the influence of soft-hard rock strata on rock blasting characteristics using numerical simulation experiments. The results show that the distance between the interface of soft-hard rock and the blasthole, as well as the distance between the structural plane and the blasthole, significantly affect the blasting effect.
Article
Engineering, Mechanical
Wenjing Niu, Xia-Ting Feng, Guangliang Feng, Yaxun Xiao, Zhibin Yao, Wei Zhang, Lei Hu
Summary: Rockbursts are complex dynamic engineering failures encountered in deep tunnels, and microseismic warning and safety control can reduce the damage and occurrence of rockburst failures. This study analyzes the behavior and microseismicity of rockbursts of different intensities, clarifies the factors and causes for rockburst warning, and establishes a method for selecting microseismic information for rockburst warning. The proposed method has been successfully applied in a tunnel for rockburst warning, effectively identifying over 85% of rockburst hazards.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Geochemistry & Geophysics
Yang Yu, Guang-liang Feng, Chang-jie Xu, Bing-rui Chen, Da-xin Geng, Bi-tang Zhu
Summary: This study investigates the quantitative threshold of energy fractal dimension for immediate rock burst warning in deep tunnels based on the cases of rock bursts in Jinping Hydropower Station in China. A calculation method for energy fractal dimension in deep linear tunnels associated with microseismic monitoring is proposed. The mechanism analysis assesses the distribution range and evolution of energy fractal dimension during the development of rock bursts. The results provide a guide for establishing a dynamic warning system and scientific basis for prediction, warning, and risk-control standards of rock burst disasters during the excavation of deep tunnels.
Article
Geosciences, Multidisciplinary
Chengcheng Gao, Manqing Lin, Yongxiong Lu, Dianji Zhang, Guangliang Feng, Xiaoshuai Liang
Summary: This paper investigates the failure process of phosphate rock under different loading rates by conducting infrared radiation and uniaxial compression tests. The results show that the higher the loading rate, the more pronounced the high-temperature zone and high-temperature point of phosphate rock during the loading process. As the loading rate increases, the energy release time of phosphate rock before damage decreases, resulting in more energy stored in the rock and ultimately leading to greater damage.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Yang Yu, Da-Cheng Zhao, Guang-Liang Feng, Da-Xin Geng, Hao-Sen Guo
Summary: This study investigates the energy evolution and acoustic emission characteristics of layered sandstone under anchorage during deformation and failure. The results show that anchoring increases the energy storage capacity of sandstone and improves its toughness. The spatial distribution of acoustic emission events and damage in the anchored sandstone is more uniform. The changes in B and D values can be used as precursors to instability and failure.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geochemistry & Geophysics
Peiyang Yu, Peng-Zhi Pan, Guangliang Feng, Zhaofeng Wang, Shuting Miao
Summary: Understanding the time-dependent characteristics of Beishan granite after excavation is crucial for ensuring the long-term stability and disaster control of the high-level radioactive waste repository. Experimental results show that the unloading path significantly affects the instantaneous volume deformation, but has minor effects on creep strain. The axial and lateral creep strain are mainly determined by creep fracture potential, which can be evaluated using a unified time-dependent fracture potential index. A damage mechanical model based on time-dependent subcritical crack growth theory reveals that strain hardening dominates the granite creep process and the strain softening effect is enhanced with increasing fracture potential index.
Article
Metallurgy & Metallurgical Engineering
Jian-cong Zhang, Quan Jiang, Guang-liang Feng, Shao-jun Li, Shu-feng Pei, Ben-guo He
Summary: This study investigated the geological characteristics and crack patterns of columnar jointed basalt, and developed a method to simulate irregular polygonal crack patterns. The results revealed that geometric irregularity significantly affects the mechanical properties of columnar jointed rock mass.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Engineering, Geological
Fuqiang Ren, Chun Zhu, Manchao He, Junlong Shang, Guangliang Feng, Jinwen Bai
Summary: By conducting true triaxial unloading rockburst tests, the difference between static-driven and dynamically triggered rockbursts was examined. The study compared and analyzed the rockburst characteristics, intensities, and precursors of three different types of rockbursts. The findings suggest that the increment f (alpha) parameter and stress drop can be used for long-term monitoring and short-term prediction of rockbursts.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Editorial Material
Chemistry, Multidisciplinary
Guang-Liang Feng, Sanichiro Yoshida, Giuseppe Lacidogna
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Environmental
Yang Yu, Jun Wang, Guang-Liang Feng, Da-Xin Geng, Hao-Sen Guo
Summary: The deterioration characteristics and damage principle of limestone under the coupling action of aqueous chemical solution and consecutive loading-unloading cycles were investigated. Laboratory cyclic consecutive loading-unloading test combined with acoustic emission monitoring was used to study the mechanics of limestone under different chemical corrosion conditions. The results showed that limestone exhibited more significant deterioration in peak strain and peak strength with lower pH acid and longer corrosion time. The quality, longitudinal wave velocity, and through-crack size of limestone were also affected by the acidic solution. The results provide experimental reference for evaluating the long-term stability of engineering rock mass.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Mining & Mineral Processing
Haosen Guo, Qiancheng Sun, Guangliang Feng, Shaojun Li, Yaxun Xiao
Summary: The damage-fracture evolution of deep rock mass has distinct characteristics, as revealed by field tests in 2400-meter deep tunnels. The evolution of the excavation damaged zone depth is consistent with that of the fractured zone depth. The research results provide valuable insights for the monitoring and support design of future construction projects.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2023)
Article
Metallurgy & Metallurgical Engineering
Guang-liang Feng, Jin-gang Ma, Bing-rui Chen, Ya-xun Xiao, Quan Jiang, Peng-xiang Li, Man-qing Lin
Summary: Rockburst hazards caused by excavation in deep TBM tunnels are a threat to construction safety. This study investigated the characteristics and intensity identification of rockburst events in deep TBM tunnels based on 43 events in the Neelum-Jhelum hydropower station in Pakistan. The study established a criterion for identifying rockburst intensity using the quantitative parameter of microseismic energy. The results showed a nonlinear relationship between rockburst intensity and microseismic energy, and the criterion was validated in the project as reliable for advance warning of rockburst events in deep TBM tunnels.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2023)
Article
Mathematics, Interdisciplinary Applications
Xiu-yang Liu, Ding-ping Xu, Shu-qian Duan, Huai-sheng Xu, Guang-liang Feng, Shi-li Qiu, Quan Jiang
Summary: Exploring the mechanical properties and crack characteristics of granites at the grain scale is important to understand brittle failures in deep-buried hard rocks. This study derived the microscopic mechanical properties of granite minerals and discussed the relationship between these properties. A parameter calibration process was proposed to reduce randomness in the calibration process. The study also discussed the microcrack evolution and crack characteristics of different minerals in granite. The results reveal the crucial role of intragranular cracks in the failure process of brittle rocks.
COMPUTATIONAL PARTICLE MECHANICS
(2023)
Article
Engineering, Geological
Yaxun Xiao, Shujie Chen, Liu Liu, Guangliang Feng, Junbo Zhou, Dongbo Hou, Shaojun Li, Jianing Guo
Summary: This paper proposes a novel method based on instantaneous phase difference intensity (IPDI) for accurately determining the S-wave arrival time of microseismic signals in tunnels. The IPDI method can correctly determine the arrival time of S-waves even when they are overlapped by P-waves. The method was successfully applied to microseismic monitoring in a deeply buried tunnel, improving the accuracy of locating rockburst and microseismic events.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Engineering, Geological
Liu Guo-feng, Feng Kun, Yan Chang-gen, Feng Guang-liang, Xu Ding-ping, Zhou Chi
Summary: This study proposes a probabilistic evaluation method for excavation unloading response of rock slopes considering the uncertainty of mechanical parameters. The method is applied to analyze a cutting slope along the Beijing-Qinhuangdao expressway under construction. Probabilistic statistical models of rock mass mechanical parameters are constructed based on laboratory tests and geological survey data, and the simulation analysis is carried out to obtain probability distributions of slope safety factor, displacement, and plastic zone. The results show the applicability of the proposed method.
ROCK AND SOIL MECHANICS
(2023)
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)
