Article
Construction & Building Technology
Gan Wang, Qian Fang, Jianming Du, Jun Wang, Qiming Li
Summary: This study introduces an artificial intelligence method to predict the steady surface settlement caused by shield tunnelling. The proposed method comprises three models: a hybrid deep neural network model (HDNN), an error correction model (ECM), and an auxiliary model. The results show that the proposed method outperforms classical deep neural networks as it considers the settlement mechanism and spatial and temporal characteristics of the input parameters.
AUTOMATION IN CONSTRUCTION
(2023)
Article
Multidisciplinary Sciences
Pengfei Xiang, Gang Wei, Shuming Zhang, Yunliang Cui, Huifang Guo
Summary: This study analyzed the influence of symmetrical surcharge, unloading, and excavation of soft clay soils on shield tunnels through indoor model tests. The results showed that surcharge causes tunnel settlement, while unloading and excavation generally cause tunnel uplift. Surcharge has a wider influence range in soft clay compared to sand, but the depth is relatively shallow.
Article
Engineering, Multidisciplinary
Zhiguo Zhang, Mengxi Zhang, Yutao Pan, Zhenbo Li, Anxin Shen, Qihua Zhao
Summary: This study presents a closed-form analytical solution to predict ground consolidation settlements under train loading, considering lining leakage and rheological medium, with validation through comparisons with in-situ observed data and existing numerical simulation results. Furthermore, a detailed sensitivity analysis is conducted to investigate the influences of concerned parameters on surface consolidation settlements, including lining-soil permeability, Boltzmann model parameters, and train loading. The study highlights the importance of considering the coupled influence of lining leakage and train loading, as well as the rheological behavior in viscoelastic porous soils.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Green & Sustainable Science & Technology
Yang Shen, Ting Zhang, Hongtao Liu, Jiahui Zhu, Pengyu Yang, Yuke Wang
Summary: This paper uses finite element software to analyze the homogeneous leakage model of different soil layers and different degrees of lining deterioration, exploring the leakage law and mechanism of underwater shield tunnels. The study finds that the severity of tunnel seepage is influenced by soil layer properties and lining deterioration. The research results provide insights for understanding and managing tunnel leakage.
Article
Chemistry, Multidisciplinary
Yi Yang, Xinggao Li, Dalong Jin, Xingqi Jiang, Hanyuan Li
Summary: The main goal of this study is to improve the prediction accuracy of ground surface settlements induced by shield tunneling. A comprehensive analysis of long-term ground-displacement data from Metro Lines No. 1 and No. 2 in Changzhou, China was conducted to evaluate the parameters characterizing the settlements. This study can provide a reliable assessment of the long-term and short-term ground surface settlements for tunnel design.
APPLIED SCIENCES-BASEL
(2022)
Article
Construction & Building Technology
Shi Jin Feng, Yong Feng, Xiao Lei Zhang, Yi Han Chen
Summary: This paper proposes a deep learning-based approach for automatic, rapid and accurate detection of tunnel lining leakage in metro shield tunnels. The developed models achieve a balance between efficiency and accuracy through the use of multiple evaluation indices. The experimental results demonstrate high accuracy and low time and space complexities compared to existing approaches. The study also provides insights into the mechanisms behind the deep learning-based models.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Construction & Building Technology
Yanjuan Hou, Mozhen Zhou, Dingli Zhang, Qian Fang, Zhenyu Sun, Yuanhao Tian
Summary: This paper investigates the ground settlement caused by multi-line tunnelling with earth pressure balance shield in Tianjin, China, and proposes an improved Peck formula, providing a reliable reference and practical tool for the design and construction of multiple tunnels in a clay stratum.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2022)
Article
Engineering, Civil
Xiaolu Gan, Jianlin Yu, Xiaonan Gong, Yongmao Hou, Nianwu Liu, Min Zhu
Summary: This paper presents a case study on the response of operating metro tunnels to compensation grouting. The study shows that the timely application of compensation grouting can effectively mitigate and stabilize long-term tunnel settlements. However, there are still limitations to the grouting treatment in certain areas.
Article
Construction & Building Technology
Ying Li, Xiaowei Bian, Hao Peng, Baoqiang Zhu, Yilin Zhou
Summary: By combining with a shield construction project of a subway tunnel, this article derives the three-dimensional calculation formulas for the additional thrust on the shield cutter head surface, the additional stress and displacement field caused by the friction force between the shield shell and the soil contact interface on the surrounding soil, using the Mindlin solution in elastic mechanics. The Loganathan ground movement pattern is used to determine the soil movement mode, and the source-sink method is used to study the formula for calculating the three-dimensional additional stress of the soil around the shield tunnel caused by ground loss. The results show that during shield excavation, the ground goes through five stages: uplift before the arrival of the shield cutter head, surface settlement when the shield reaches the surface, subsidence when the shield tail passes through, settlement when the lining is separated from the shield, and consolidation and settlement after the shield passes through.
Article
Construction & Building Technology
Yu Wan, Zhiduo Zhu, Lei Song, Shigong Song, Jun Zhang, Xiaobin Gu, Xiaoyu Xu
Summary: Ground surface settlement is inevitable during shield tunneling due to over excavation by the shield machine and the annular gap between the shield and surrounding soils. Clay shock, a two-component grouting material, can be used to fill the shield-out space. Laboratory tests showed that the viscosity and mechanical strength of clay shock can be influenced by additives, and the chemical reaction between sodium silicate and bentonite is affected by water content.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Qing He, Liying Xu, Zhiyong Yang, Weiqiang Qi, Zhigang Zhang, Ziyu Shen
Summary: During the construction of earth pressure balance shield tunneling in Beijing sandy cobble ground, a prediction model was successfully established by exploring the correlation between shield advancement rate and various parameters using multi nonlinear regression analysis. The research found that the total thrust has a significant impact on the advancement rate, and when the advancement time exceeds 57 minutes, the advancement rate is highly positively correlated with daily progress.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Metallurgy & Metallurgical Engineering
Chen-jie Gong, Chao-ran Xie, Zan-quan Lin, Dong-wu Xie, Zhong Zhou
Summary: Accurately predicting the impact of shield tunnel construction under buildings on the ground surface can reduce the impact of construction on buildings. This study explored the influence of building stiffness and load on the deformation of the formation during shield tunneling under multi-story buildings. A calculation method was developed to consider the additional stress and stiffness brought by the buildings, and the surface deformation caused by shield tunneling was compared and analyzed in different scenarios. The results showed that considering both stiffness and load is necessary in practical applications.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2023)
Article
Green & Sustainable Science & Technology
Xin Shi, Yi Cao, Chuanxin Rong, Gangjian An, Houliang Wang, Linzhao Cui
Summary: This study established 2D and 3D calculation models to analyze the law of leakage diffusion under water pressure and the influence of pipeline leakage on ground settlement during shield tunneling. The results showed that the 3D model is more accurate than the theoretical solution in predicting ground settlement.
Article
Chemistry, Physical
Ba Hezhuoli Ke Zierkailedi, Libo Bian, Xiufang Wang, Xingbo Hu, Xuelei Liu, Zhi Zhang
Summary: The Slurry shield tunnel slag (SSTS) from the Beijing East Sixth Ring Road renovation project amounts to about 3 million cubic meters, consisting mainly of fine and silt sand. Through investigation, it was found that replacing 40% of Coarse Manufactured Sand (CMS) with SSTS can improve the workability and durability of concrete without affecting compressive strength. However, the presence of clay lumps in SSTS can have adverse effects on concrete properties, which can be mitigated through dewatering and crushing.
Article
Engineering, Mechanical
Rujia Li, Huayang Lei, Changyuan Ma, Yingnan Liu, Ningmin Liu
Summary: In this paper, a self-designed test device was used to investigate sand erosion and void development induced by shield-tunnel joint leakage. The experimental results show that sand erosion has obvious temporal and spatial evolution characteristics. It can be divided into four stages in the temporal dimension and three regions in the spatial dimension. The erosion zone can be described by a rotating ellipsoid, and its scope increases with increasing water head.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Geological
J. Zhang, S. Yang, L. L. Zhang, M. L. Zhou
Summary: This paper suggests a hybrid method based on Bayes' theorem to estimate the soil-water characteristic curve (SWCC). The suggested method combines empirical methods and measured data to provide the best estimate of SWCC while accounting for the associated uncertainty.
CANADIAN GEOTECHNICAL JOURNAL
(2022)
Article
Engineering, Geological
Meng Lu, Jie Zhang, Jianguo Zheng, Yongtang Yu
Summary: This study suggests a mechanics-based method to evaluate the annual failure probability of a slope under rainfall conditions, which can explicitly consider the local conditions of the slope. This method may increase the capability of the profession to assess the rainfall-induced landslide risk by identifying the contributions from different types of rainfalls to the annual failure probability of the slope.
Article
Engineering, Mechanical
Yao Tang, Yuequan Bao, Zhi Zheng, Jie Zhang, Yongchang Cai
Summary: This paper reports on the research work of performance assessment on a drainage culvert in Shanghai, China. Through field investigations and modeling, the deterioration of the culvert is evaluated, and it is found that the local design code is too conservative. A finite element model is built to assess the performance of the culvert, taking into account the uncertainty. Recommendations are made for the maintenance of the drainage culverts, and the findings may also provide useful reference for assessing deteriorating culverts in other regions.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Geological
Jie Zhang, Zipeng Wang, Jinzheng Hu, Shihao Xiao, Wenyu Shang
Summary: This paper introduces a Bayesian machine learning-based method to evaluate the effect of model and observational uncertainties on slope failure time (SFT) prediction. A comprehensive slope failure database is compiled and the application of the method is illustrated with an example. Verification studies show that the method outperforms the traditional inverse velocity method and the maximum likelihood method. This study provides an effective tool for predicting SFT.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2022)
Article
Engineering, Geological
J. Zhang, J. T. Xian, C. G. Wu, W. T. Zheng, J. G. Zheng
Summary: This paper suggests a performance-based method to assess permanent displacement of a slope, considering uncertainties in ground motions and basic soil parameters. The method includes analyzing statistics of permanent displacement at different peak ground acceleration levels and deriving fragility curve through regression analysis. The study shows that soil property uncertainties can contribute up to 40% to the uncertainty in permanent displacement.
GEORISK-ASSESSMENT AND MANAGEMENT OF RISK FOR ENGINEERED SYSTEMS AND GEOHAZARDS
(2022)
Article
Engineering, Environmental
Tianpeng Wang, Shihao Xiao, Jie Zhang, Baocheng Zuo
Summary: This study validates the depth consistency assumption of V-s data and proposes two probabilistic models for liquefaction potential assessment based on this assumption. The performances of the suggested models are found to be superior to the Chinese code model and comparable to frequently used models.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Engineering, Geological
Qi Cui, Lulu Zhang, Xiangyu Chen, Zijun Cao, Xin Wei, Jie Zhang, Jiabao Xu, Dongsheng Liu, Chunlan Du
Summary: This paper proposes an efficient QRA method that involves the direct simulation of the entire landslide process and compares the results with conventional approaches. Two case histories of landslides are investigated, and the effects of risk mitigation works are also discussed.
Article
Engineering, Geological
Jie Zhang, Chenguang Wu, Xiaohui Tan, Hongwei Huang
Summary: In this paper, a hierarchical response surface method is proposed to evaluate the reliability of a pile-slope system. The method can determine the minimum reliability indexes of different failure modes and identify the representative failure modes governing the failure probability of the system. The study shows that the critical sliding surfaces of an unreinforced slope and a reinforced slope are different.
CANADIAN GEOTECHNICAL JOURNAL
(2023)
Article
Engineering, Geological
Meng Lu, Jianguo Zheng, Jie Zhang, Hongwei Huang
Summary: This study aims to assess the probability of slope failure induced by rainfall during a given exposure time. It is found that slope failure events in different years are not entirely statistically independent, contrary to the Poisson assumption. The method based on the Poisson assumption tends to overestimate the failure probability of the slope during an exposure time, but it is still quite accurate when the annual failure probability is small and the exposure time is short. Method 1 is theoretically most stringent but computationally most expensive, Method 2 is computationally most efficient when the failure probability is large, and Method 3 is computationally most efficient when the failure probability is small.
Article
Engineering, Geological
Jie Zhang, Hong-zeng Yao, Zi-peng Wang, Ya-dong Xue, Lu-lu Zhang
Summary: This paper assesses the performances of linear and non-linear inverse velocity (INV) methods in predicting slope failure time. It is found that non-linear INV methods may encounter pitfalls such as saddle points and ill-conditioned Hessian matrices. On the other hand, linear INV methods are more stable and accurate, making them a preferred choice in future applications.
GEORISK-ASSESSMENT AND MANAGEMENT OF RISK FOR ENGINEERED SYSTEMS AND GEOHAZARDS
(2023)
Article
Geosciences, Multidisciplinary
Meng Lu, Jie Zhang, Qing Lue, Lulu Zhang
Summary: Assessing the annual probability of slope failure under rainfall is crucial in quantitative risk assessment. This study proposes a novel method to assess the probability based on intensity-duration-frequency curves. By considering the uncertainty of rainfall duration and simulating the most critical rainfall, it provides a practical tool for quantitative risk assessment of rainfall-induced landslides.
Article
Engineering, Civil
Jin-zheng Hu, Jian-guo Zheng, Jie Zhang, Hong-wei Huang
Summary: In this study, a Bayesian framework is proposed to evaluate the effectiveness of a site investigation program by measuring the uncertainty reduction using the expected reduced variance (ERV). The uncertain outcomes of all possible site investigation data are considered through their probabilistic distributions, and a framework to calculate the ERV is established. Monte Carlo simulation and the bootstrap method are used to analyze the statistical uncertainty. Two examples of a shallow foundation on sand and an undrained slope are provided, and the optimal sampling layout is discussed. This method shows promise in optimizing the sampling layout for various geotechnical practices.
ASCE-ASME JOURNAL OF RISK AND UNCERTAINTY IN ENGINEERING SYSTEMS PART A-CIVIL ENGINEERING
(2023)
Article
Engineering, Geological
Wei Guo, Xiaohui Tan, Jie Zhang, Xin Lin, Xiaole Dong, Xiaoliang Hou
Summary: Probabilistic analysis framework is proposed for assessing the uncertainty of laterally loaded pile systems. The framework considers the spatial variability of soil and correlation between failure modes using random field theory and First-Order Reliability Method. The Sequential Compounding Method is used to determine system reliability indexes efficiently. The framework is validated by comparing with the Monte Carlo Simulation Method.
GEORISK-ASSESSMENT AND MANAGEMENT OF RISK FOR ENGINEERED SYSTEMS AND GEOHAZARDS
(2023)
Article
Engineering, Marine
Zhihai Chen, Zechao Zhang, Weichao Li, Tianpeng Wang, Jie Zhang
Summary: This study quantifies the moment contribution of the base shear force in large-diameter monopiles using finite element simulation, and proposes a novel FHC model to establish the relationship between the base shear force and tip deflection.
Article
Engineering, Geological
Peng Zeng, Tianlong Zhang, Tianbin Li, Rafael Jimenez, Jie Zhang, Xiaoping Sun
Summary: A binary classification method (BCM) was proposed to enhance the computational efficiency in slope reliability analyses. By combining judgement-based strength reduction method and active-learning support vector machine, the BCM approximated the true limit state function and calculated the probability of failure in slope systems.
GEORISK-ASSESSMENT AND MANAGEMENT OF RISK FOR ENGINEERED SYSTEMS AND GEOHAZARDS
(2022)
