Article
Computer Science, Interdisciplinary Applications
Alexandros N. Nordas, Matteo Natale, Thomas Leone, Georgios Anagnostou
Summary: Shield jamming is a significant hazard in mechanized tunnelling under squeezing conditions. This occurs in narrow fault zones between competent rock layers, where the wall effect reduces deformations and rock pressures, making shield jamming less likely. This paper proposes two new thrust force estimation methods that consider the favorable influence of the wall effect in narrow fault zones, providing a valuable tool for design.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Civil
Xu Song, Huai-Na Wu, Fan-Yan Meng, Ren-Peng Chen, Hong-Zhan Cheng
Summary: In this study, a finite element model was established to investigate the soil arching effect caused by shield tunneling under deep-buried and saturated conditions. The methods to determine the arch zone and loosened zone were proposed and verified, and the differences of soil arching effect between saturated sandy and clayey soil layers were compared. The numerical results provided new insights into the soil arching evolution and the corresponding tunnel overburden pressure in deep saturated ground.
TRANSPORTATION GEOTECHNICS
(2023)
Article
Construction & Building Technology
Lipeng Liu, Xiaogang Wang, Changbo Li, Zhenhua Tian
Summary: This study investigates the prevention methods and assessment criteria of shield jamming through numerical simulation and practical engineering verification, providing valuable references for TBM excavation in squeezing ground.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
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
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
Construction & Building Technology
Dukun Zhao, Zhangang Sun, Yueji He, Xin Chen, Rentai Liu
Summary: This study investigates the impact of shield construction parameters on ground subsidence and establishes intelligent prediction methods to forecast it. The findings provide valuable insights for preventing and mitigating excessive subsidence.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Geochemistry & Geophysics
Wei Wang, Jingjing Liu, Xueming Zhang, Jing Chen
Summary: This study conducted field tests and numerical simulations to investigate the soil disturbance in earth pressure balance shield construction in sandy cobble ground, and proposed a calculation method.
Article
Construction & Building Technology
Ashwani Jain, K. S. Rao
Summary: The Himalaya region has complex and weak geology, resulting in high fragility and instability. This study developed three-dimensional empirical correlations using regression analysis to predict tunnel deformation. The proposed correlations were compared with existing ones and showed improvement in accuracy.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2022)
Article
Engineering, Civil
Xiaolu Gan, Jianlin Yu, Xiaonan Gong, Nianwu Liu, Dongzhu Zheng
Summary: This paper presents a two-stage analytical method for investigating the influences of new tunneling on existing tunnels, considering the asymmetric ground settlement. The proposed method is verified with field measurement data and a parametric analysis is conducted to study the influences of input parameters on tunnel responses.
Article
Engineering, Geological
Ketan Arora, Marte Gutierrez, Ahmadreza Hedayat, Erick Christian Cruz
Summary: This study focused on improving the understanding of tunnel squeezing through a physical model test simulating tunnel boring machine excavation in squeezing clay-rich rocks. Experiments were conducted at realistic in-situ stress levels to study time-dependent tunnel convergence in three dimensions.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Engineering, Marine
Chengwei Zhu, Hongwei Ying, Xiaonan Gong, Xiao Wang, Wei Wu
Summary: This study develops a new set of analytical solutions for analyzing the wave-induced hydraulic response on submarine shield tunnels, which are verified with numerical simulations. Results show that soil permeability is the most significant factor affecting the hydraulic response, and the shield tunnel acts as both an obstruction to water pressure propagation and a drain in the seabed.
Article
Engineering, Geological
Ketan Arora, Marte Gutierrez, Ahmadreza Hedayat
Summary: The design of support systems for tunnels in squeezing ground conditions is a challenging task. This study develops a novel experimental setup using a physical model to simulate the tunnel excavation and support installation process in clay-rich rocks. The interaction between the support and the squeezing ground is observed to gain better understanding. The study proposes a time-dependent longitudinal displacement profile model for the supported tunnel and provides recommendations for optimizing the support requirement in squeezing ground conditions.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2022)
Article
Environmental Sciences
Rongzhu Liang, Cheng Kang, Liming Xiang, Zhongchao Li, Cungang Lin, Kun Gao, Yang Guo
Summary: The paper presents a simplified method to predict the response of in-service shield tunnels crossing over in soft ground, by calculating unloading loads from overcrossing tunnelling and solving tunnel deformation numerically. The proposed method is validated with two case histories showing good agreement between predicted tunnel heave and field measurements. The study also reveals that the tunnel heave is greater when a new tunnel crosses obliquely or parallelly over an existing tunnel, and that ground elastic modulus and tunnel diameter have significant effects on tunnel heave and ring dislocation.
ENVIRONMENTAL EARTH SCIENCES
(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
Engineering, Geological
Ketan Arora, Marte Gutierrez
Summary: This study proposes a new visco-elastic-plastic solution for deep circular tunnels in soft rock and high field stress conditions. By comparing with experimental data, it is found that the proposed solution accurately predicts tunnel wall displacement and reflects the time-dependent behavior of the tunnels.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2021)
