Article
Construction & Building Technology
Fuxue Sun, Mingqing Liu, Yunhui Zhu, Xiaochun Li, Gang Ge
Summary: This paper takes the deep and large foundation pit of the top-down construction method of shield exit shaft of S2 line of Wenzhou City railway as the research object, and uses numerical simulation method to analyze the deformation characteristics of diaphragm wall under two different working conditions. The suspended foot diaphragm wall is determined as the final construction scheme.
ADVANCES IN CIVIL ENGINEERING
(2022)
Article
Engineering, Civil
Gang Wei, Yongjie Qi, Chunlai Chen, Shuming Zhang, Chengli Qian, Jian Zhou
Summary: The aim of this study was to investigate the protective effect of isolation piles on existing tunnels during foundation pit excavation. By establishing a three-dimensional mechanical calculation model and deducing the corresponding formulas, it was found that the installation of isolation piles could effectively reduce the horizontal displacement of existing tunnels, and the protective effect improved as the distance between isolation piles decreased.
TRANSPORTATION GEOTECHNICS
(2022)
Article
Construction & Building Technology
Kaixin Liu, Samuel T. Ariaratnam, Peng Zhang, Xiaolong Chen, Jing Wang, Baosong Ma, Yunlong Zhang, Xin Feng, Tianshuo Xu
Summary: The stability of braced structures in pipe jacking is vital for ensuring structural safety during excavation and jacking drive. In this study, the real-time deformation and mechanical response of diaphragm walls, internal struts, and soils behind the walls were analyzed through in-situ monitoring and a three-dimensional finite element model. The internal struts effectively restrained wall deflection and earth pressure, exhibiting apparent time-space and corner effects in the limited-scale and deep launch pit. Furthermore, the pipe jacking operation influenced the reaction wall within a certain zone, leading to apparent spatial effects. Despite some mucky soil reaching ultimate equilibrium during deep excavation and jacking drive, the diaphragm walls maintained superior strength and stiffness.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Engineering, Geological
Liyuan Tong, Hongjiang Li, Si Ha, Songyu Liu
Summary: This paper examines the lateral response of group piles to a unique pit-in-pit excavation, analyzing the cumulative influence of the excavation system on the lateral bearing mechanism of existing piles in the transition zone. Results show that the excavation area of the inner pit has a more significant impact on the lateral pile performance compared to the excavation depth. Additionally, a loss ratio method is proposed to evaluate the loss of lateral bearing capacity of piles at different locations in the transition zone due to pit-in-pit excavation.
Article
Geosciences, Multidisciplinary
Changjiang Wu, Jun Yu, Xiaojian Cao, Wuqin Shen
Summary: The technology of pile wall combination in a deep foundation pit involves using the stiffness of retaining pile and basement wall to resist soil and water pressure. The interaction between the retaining pile and basement wall was studied during construction and normal service stages, showing that the basement wall can reduce lateral displacement and affect the bending moment of the retaining pile. Factors such as relative stiffness ratio and horizontal beam stiffness significantly influence the interaction between pile and basement wall.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Engineering, Geological
Hua-jing Zhao, Wei Liu, Pei-xin Shi, Jiang-tao Du, Xiu-ming Chen
Summary: This paper presents a CNN-based prediction method for CDW deflections, which is validated through a deep excavation project in Suzhou, China. The results show that the CNN model outperforms other algorithms in terms of accuracy and execution time, providing important implications for CDW deflection prediction in construction safety management.
Article
Multidisciplinary Sciences
Qiuwei Yang, Zhikun Ba, Zhuo Zhao, Xi Peng, Yun Sun
Summary: This paper proposes a stability evaluation method for a pile hole wall under blasting impact. The method considers the effect of blasting impact stress and establishes the strength condition for collapse failure using the Mohr-Coulomb strength theory and symmetry analysis. Experimental data from a shaking table test on a pile hole model verify the effectiveness and feasibility of the proposed method.
Article
Environmental Sciences
Jinguo Wang, Zhiheng Ma, Jiale Zeng, Zhou Chen, Guoqing Li
Summary: Evaluating the influence of geologic features on dewatering efficiency is crucial for optimizing dewatering designs. The permeability and distribution of the clay layer play a significant role in pit dewatering, but its discontinuity can affect the dewatering rate as well.
Article
Construction & Building Technology
Changbai Wang, Jimin Liu, Hua Cheng, Haibing Cai
Summary: This paper investigates the excavation-induced disturbance range and mechanism of adjacent pipeline jacking group on surrounding soils. Through field tests and evaluations, it is found that the disturbance intensity is greatly affected by the parallel distance and buried depth.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Jiaqi Lu, Huihuang Jiang
Summary: The study focused on reducing the impact of deep and large foundation pits on nearby subway tunnels by proposing a T-shaped pile support system. Through finite element software analysis, it was found that the T-shaped structure exhibited a central effect and can meet the requirements of pit excavation.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Zan Li, Songyu Liu, Kai Wu, Taishan Lu
Summary: This study proposes a semi-analytical approach to estimate the change in load-settlement behavior of an uplift pile considering the effects of excavation. By introducing nonlinear shear-induced soil displacement, the method can predict the load-displacement behavior of the uplift pile more accurately. The parametric study shows that the soil friction angle and the ratio of excavation depth to pile effective length have a significant influence on the loss in pile uplift capacity caused by excavation.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Qianwei Xu, Jinli Xie, Zili Sun, Linhai Lu, Hangfei Yu
Summary: Circular diaphragm walls are increasingly used in ultra-deep foundation pits due to their reasonable structural support. However, the stability analysis of their double-angled trench walls remains a challenge. This paper proposes an instability model based on 3D sliding body analysis for double-angled trench walls and determines the minimum amount of slurry needed to maintain their integrity.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Civil
Junwei Jin, Boyi Fu, Min Yang, Mingyu Li, Yanqing Wei
Summary: This study investigates the effects of bored piles on existing tunnels through centrifuge model tests and numerical simulations. The results show that the tunnel moment increases with the pile load and decreases with the net distance between the pile and tunnel. The circumferential moments near the pile bottom are larger than those near the other parts. The findings provide valuable insights into the effect of loaded piles on nearby tunnels and the design of buildings near subways.
INTERNATIONAL JOURNAL OF CIVIL ENGINEERING
(2022)
Article
Engineering, Geological
W. Mohammed, J. Han
Summary: This study investigates the effects of wall configuration and pile location on the performance of the pile-MSE wall system under static lateral loads through reduced-scale model tests. The experimental results indicate that the piles in high walls can develop larger maximum compressive and tensile strains, while low walls result in larger wall facing deflections and maximum tensile strains in the geogrid reinforcement.
GEOSYNTHETICS INTERNATIONAL
(2022)
Article
Construction & Building Technology
Chen Zhao, Yong Feng, Weijian Wang, Zijuan Niu
Summary: This paper uses Abaqus software to simulate the force of the project, explores the calculation results of the planar elastic foundation beam considering the arch effect and the numerical simulation technology of the foundation pit's support, and analyzes and compares the rationality of the model. The simulation results show that the simulated value is basically consistent with the measured value, and the simulated value is slightly larger than the measured value because the interference conditions are idealized during simulation. The accuracy and rationality of the numerical simulation are verified, and the parameters, such as the thickness and burial depth of the continuous underground wall, can be changed to provide a reference for the support method of a deep foundation pit similar to a continuous underground wall.
Article
Engineering, Civil
Haiyang Zhuang, Jiawei Ren, Yu Miao, Liguo Jing, Erlei Yao, Changjie Xu
Summary: A soil constitutive model for dynamic large deformation of soft soil was developed, and a finite element model was built to simulate static and dynamic coupling interaction between soil and underground structure. The study investigated seismic performance and damage mechanisms of large underground subway stations in different soil foundations, finding that the interaction mechanism changes with soil type and peak ground motion acceleration. Regulations in Chinese codes may not be suitable for evaluating seismic performance in soft soil foundations or strong earthquakes, requiring specialized time-history analysis methods instead. Five seismic performance levels were defined based on inter-storey drift angle and corresponding earthquake damage states.
JOURNAL OF EARTHQUAKE ENGINEERING
(2021)
Article
Construction & Building Technology
Yong Tan, Ye Lu, Dalong Wang
Summary: The failure of Shanghai Metro Line 4 in 2003 was a significant event in the history of subway construction in China, resulting in partial collapse of the subway line. The accident, rooted in the excavation of a cross passage within a confined aquifer, ultimately led to massive ground subsidence and structural damage.
JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES
(2021)
Article
Construction & Building Technology
Ye Lu, Yong Tan, Bo Yang, Wan-Lei Chen
Summary: This study explored the failure mechanism of ground subsidence caused by removing large isolated boulder in the sand matrix during tunneling and its impact on tunnel performance using numerical modeling. The research found that removing the boulder initially maintained stability of the soil stratum above the cavity, but over time led to subsidence or cave-in of the ground surface. Furthermore, the removal of the boulder also affected the mechanical properties of the tunnel lining.
JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES
(2021)
Article
Computer Science, Interdisciplinary Applications
Xiao-zhen Fan, Kok-Kwang Phoon, Chang-jie Xu, Chong Tang
Summary: This study proposes a closed-form solution for predicting excavation-induced ground settlement profile, which is validated and proven effective through comparison with existing methods and case record data.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Ocean
Xianghua Song, Shuaiwen Cui, Yong Tan, Yufei Zhang
Summary: The study reveals that high water pressure in subsea tunnel construction has significant effects on seabed settlement, earth pressures, and tunnel lining axial forces and bending moments. As water level rises, settlement increases linearly and total earth pressures around the tunnel lining perimeter significantly increase and become more uniform.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2022)
Review
Engineering, Mechanical
Weizhen Jiang, Yong Tan
Summary: This paper reviewed 170 excavation failure cases occurring during 1994-2018 in China, focusing on their statistical failure patterns and contributory factors. The study found that failures occurred more frequently in deep excavations in sandy soils during summer, mainly influenced by heavy rainfall and technical factors.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Environmental Sciences
Xianghua Song, Yong Tan
Summary: Through experiments and numerical simulations, the impact of different rainfall patterns on slope stability was studied, revealing that the delayed rainfall pattern is the most dangerous while the advanced rainfall pattern has the shortest threshold for instability.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Review
Construction & Building Technology
Yong Tan, Ying-Ying Long
Summary: The high frequency of cave-in failures of urban roadways in China poses a serious threat to safety, with major causes including damage to preexisting underground structures, roadway subgrade erosion, and underground construction. Timely inspection and reliable measures are crucial for prevention.
JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES
(2021)
Article
Construction & Building Technology
Weizhen Jiang, Yong Tan
Summary: Global warming has led to increased rainfall intensities in China, resulting in a significant threat to underground infrastructures in urban areas. This study provides an overview of 378 underground infrastructure failures associated with heavy rainfall in China. The findings highlight that the increase in failures can be attributed to intensified rainfall in rapidly urbanizing regions and that the resilience of underground infrastructures is influenced by nearby drainage facilities and soil types.
SUSTAINABLE CITIES AND SOCIETY
(2022)
Article
Engineering, Civil
Yong Tan, Dongdong Fan, Ye Lu
Summary: This paper presents the results of statistical analyses on a database of 592 deep excavations in Shanghai soft clays from 1995 to 2018. The findings provide insights into the trends, patterns, and major design factors related to different excavation methods and earth-supporting systems. The study also identifies and summarizes the major design and construction defects, as well as natural hazards, affecting the performance of deep excavations. The results and lessons from this study are valuable for professionals worldwide in achieving cost-effective designs and evaluating the performance of deep excavations in soft clays.
PRACTICE PERIODICAL ON STRUCTURAL DESIGN AND CONSTRUCTION
(2022)
Editorial Material
Construction & Building Technology
Yong Tan, Ye Lu, Dalong Wang
JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES
(2022)
Article
Engineering, Geological
Guohui Feng, Changjie Xu, Luju Liang, Ming-wang Tey, Min-liang Chi, Shangqi Ge
Summary: The interaction between tunnel and adjacent excavation has a significant impact on the response of the existing tunnel, but there are few reports on using the Kerr foundation model to simulate the tunnel-soil interaction. This study proposes a simplified theoretical method based on the Timoshenko beam and Kerr foundation model to accurately evaluate the response of the existing tunnel induced by adjacent excavation.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2023)
Article
Engineering, Civil
Junzuo He, Shaoming Liao, Yong Tan, Mengbo Liu
Summary: This paper proposes a new analytical method to study the surface settlement induced by pipe-roof tunnelling by considering the interaction between socketed pipes. Through numerical simulations and comparative analysis, the rationality and effectiveness of the new method are confirmed.
KSCE JOURNAL OF CIVIL ENGINEERING
(2023)
Article
Construction & Building Technology
Yong Tan, Ye Lu, Dalong Wang
Summary: The destructive failure of Shanghai Metro line 4 on July 1, 2003, resulted in ground subsidence, collapse of structures, and the creation of rigid obstructions in the strata, making rehabilitation challenging. After extensive comparisons, it was decided to reconstruct the collapsed metro line at its original location using a cut-and-cover tunnel connected to the existing line through tunnels created by ground-freezing. Innovative construction plans and techniques were implemented, leading to the success of the rehabilitation project, which can serve as a practical reference for similar projects worldwide.
JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES
(2023)
Article
Construction & Building Technology
Jun-Cheng Liu, Yong Tan, Shao-Ming Liao
Summary: A 193.5-m high concrete TV tower in Nantong, China, was at risk due to the excavation for an interchange subway station nearby. To mitigate the adverse effect, barrier piles and large-diameter piles were constructed. Underpinning with steel pipe piles was eventually done to prevent excessive settlements. The project provides valuable lessons and protection plans for safeguarding high-rise structures sensitive to ground movement.
JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES
(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)