Article
Engineering, Geological
Runhong Zhang, Anthony Teck Chee Goh, Yongqin Li, Hanlong Liu, Lin Wang, Zhixiong Chen, Wengang Zhang
Summary: This study investigates the influence of clay anisotropy on the basal heave stability of excavations and proposes a regression model for predicting the basal heave stability in anisotropic clay.
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
Green & Sustainable Science & Technology
Kaiqi Meng, Guangming Yu, Liang Li, Zhen Xu, Jun Lei, Yanxiang Fan, Hongbiao Yu, Liang Xu
Summary: A framework for evaluating deformation-based basal heave stability is proposed to distinguish between freely developed and prohibited basal heave failures. The critical thickness of soft soil layer between supporting structures and hard stratum is about 0.3B (B = excavation width), above which freely developed basal heave failure occurs. The failure probability of basal heave failure at the center point increases significantly within a limited B range, and decreases or varies slightly beyond a certain value under a given thickness of soft soil layer.
Article
Engineering, Civil
Wengang Zhang, Runhong Zhang, Chongzhi Wu, Anthony T. C. Goh, Lin Wang
Summary: This paper investigates the effects of anisotropic soil parameters on the base stability of deep braced excavations using finite-element analysis and statistical regression analysis. The results show that anisotropy needs to be considered in the design of braced excavations, and XGBoost and RFR models can reasonably predict the factor of safety against basal heave.
Article
Chemistry, Multidisciplinary
Hao Cheng, Hui Chen, Hanying Jia, Shu Zhang, Xiao Liu
Summary: This study investigated the effect of spatial variable MCC model parameters on excavation settlement using a probabilistic transient hydro-mechanical coupling analysis. The results showed that both deformation parameters had a positive relationship with settlement, with kappa having a more significant effect. The maximum settlement and its location followed a log-normal distribution. Increasing parameter variability led to increased surface settlement, expansion of the significant influence region, and decreased reliability. By controlling the standard value of surface settlement, the reliability index could be greatly enhanced.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Industrial
Weixun Yong, Wengang Zhang, Hoang Nguyen, Xuan-Nam Bui, Yosoon Choi, Trung Nguyen-Thoi, Jian Zhou, Trung Tin Tran
Summary: The construction of metropolises in smart cities is a trend in developed countries, but it may cause damages to the surrounding structures. To ensure the safety of the surrounding structures, diaphragm walls have been applied to prevent deformation or collapse. This study proposes two intelligent models based on the finite element method and metaheuristic algorithms to predict the deflection of diaphragm walls induced by deep braced excavations. The results show that the proposed models, MLP-HHO and MLP-WO, provide high accuracy in predicting diaphragm wall deflection.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(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
Weeradetch Tanapalungkorn, Wittawat Yodsomjai, Suraparb Keawsawasvong, Thanh Son Nguyen, Weeraya Chim-Oye, Pornkasem Jongpradist, Suched Likitlersuang
Summary: This paper presents a probabilistic analysis of the basal heave stability of supported excavations with spatially random soils. By employing random adaptive finite element limit analysis and Monte Carlo simulations, the study investigates the effect of soil strength variability on stability. The findings can be valuable for engineering practitioners in the design process of excavation problems.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Geological
Jie Yang, Yingjing Liu, Saffet Yagiz, Farid Laouafa
Summary: This paper establishes an intelligent procedure to update deformation of braced excavation in clay by combining observational method with deep learning technique. The GRU neural network and Nadam algorithm are used for model formulation and data learning. Results show accurate prediction of wall deflection and ground settlement, indicating high accuracy and reliability of the proposed intelligent procedure.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2021)
Article
Computer Science, Interdisciplinary Applications
Meng Han, Xiangsheng Chen, Zhe Li, Jinqing Jia
Summary: This paper proposes an improved inverse analysis method and a modified apparent earth pressure model for braced excavations in soft clay. A new procedure for inverse analysis of excavation is suggested based on quintic spline interpolation function, and a trial algorithm is used to eliminate errors generated in the inverse process. The proposed inverse solutions are validated by numerical simulations and reported engineering examples and show good agreements. Based on the inverse data and empirical apparent pressure diagram (APD), a modified apparent earth pressure method for braced excavations in soft clay is further suggested, and the relationship between the degree of anisotropy of soft clay and apparent earth pressure coefficients is discussed.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Ocean
Lisha Zhang, Xiao Wei
Summary: This study derived an analytical solution for excess pore water pressure response in basal clay based on a large excavation model, and conducted a parametric study to identify three types of factors affecting pore water pressure response, effective stress development, and basal soil deformation.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Van Qui Lai, Khamnoy Kounlavong, Suraparb Keawsawasvong, Warit Wipulanusat, Pitthaya Jamsawang
Summary: This study investigates the undrained basal stability of fully braced excavation in anisotropic clays and proposes design charts and failure mechanisms based on finite element limit analysis. The developed artificial neural network formula provides a practical approach for calculating the basal stability of excavations.
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, Geological
Maosong Huang, Hongyu Wang, Zhen Tang, Jian Yu
Summary: This study presents a basal heave stability analysis in anisotropic and non-homogeneous undrained clay using the kinematic approach of limit analysis, proposing a failure mechanism consisting of four translational rigid blocks and a streamline-based shear zone. The streamline solution is shown to produce accurate upper-bounds compared with other existing solutions, and its validation in anisotropic and non-homogeneous clay is confirmed through a well-documented case study.
Article
Engineering, Civil
Linlong Mu, Maosong Huang, Gholam H. Roodi, Zhenhao Shi
Summary: In this study, an analytical model is used to relate the wall deflection of braced excavation to the response of adjacent pile-supported buildings, providing a theoretical tool for determining the allowable deformation of excavation support structures. The model considers interactions between raft, piles, and soils, and a dimensionless factor is proposed to determine the serviceability limit states of braced excavation based on the ratio of building angular distortion to maximum retaining wall deflection.
GEOMECHANICS AND ENGINEERING
(2021)
Article
Engineering, Environmental
A. T. C. Goh, Wengang Zhang, Yanmei Zhang, Yang Xiao, Yuzhou Xiang
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2018)
Article
Engineering, Geological
Y. L. Gui, Z. Y. Zhao, L. B. Jayasinghe, H. Y. Zhou, A. T. C. Goh, M. Tao
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2018)
Article
Engineering, Geological
W. Nie, Z. Y. Zhao, A. T. C. Goh, M. K. Song, W. Guo, X. Zhu
ENGINEERING GEOLOGY
(2018)
Article
Computer Science, Interdisciplinary Applications
Wengang Zhang, Zhongjie Hou, Anthony T. C. Goh, Runhong Zhang
COMPUTERS AND GEOTECHNICS
(2019)
Article
Construction & Building Technology
Wengang Zhang, Runhong Zhang, Wei Wang, Fan Zhang, Anthony Teck Chee Goh
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2019)
Article
Engineering, Geological
A. T. C. Goh, R. H. Zhang, W. Wang, L. Wang, H. L. Liu, W. G. Zhang
Article
Engineering, Civil
W. G. Zhang, R. H. Zhang, L. Han, A. T. C. Goh
Article
Engineering, Civil
Runhong Zhang, Wengang Zhang, A. T. C. Goh, Zhongjie Hou, Wei Wang
GEOMECHANICS AND ENGINEERING
(2018)
Article
Engineering, Civil
Wengang Zhang, Runhong Zhang, Anthony T. C. Goh
GEOMECHANICS AND ENGINEERING
(2018)
Article
Engineering, Geological
Wengang Zhang, Wei Wang, Dong Zhou, Runhong Zhang, A. T. C. Goh, Zhongjie Hou
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2018)
Article
Engineering, Civil
Wengang Zhang, Runhong Zhang, Yinrong Fu, A. T. C. Goh, Fan Zhang
GEOMECHANICS AND ENGINEERING
(2018)
Article
Engineering, Civil
W. G. Zhang, A. T. C. Goh, K. H. Goh, O. Y. S. Chew, D. Zhou, Runhong Zhang
Article
Engineering, Civil
Yuzhou Xiang, Anthony Teck Chee Goh, Wengang Zhang, Runhong Zhang
GEOMECHANICS AND ENGINEERING
(2018)
Article
Engineering, Geological
Wengang Zhang, Runhong Zhang, Anthony T. C. Goh
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(2018)
Article
Computer Science, Interdisciplinary Applications
Yinghao Deng, Yang Xia, Di Wang, Yan Jin
Summary: This study investigates the mechanism of hydraulic fracture propagation in laminated shale, develops a numerical solver, and validates the effectiveness of the method through simulation experiments. The study also examines the influence of the interaction between hydraulic fractures and weak interfaces on the mechanical properties of shale.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Zhichao Zhang, Mingfei Feng, Guangshuo Zhou, Zhenglong Xu
Summary: A thermodynamic constitutive model for structured and destructured clays is proposed in this paper. The model includes state-dependent relations of hyperelasticity and plasticity without the concept of yielding surface. The proposed model captures the couplings between elasticity and plasticity and the effects of bonding structure.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Deze Yang, Xihua Chu
Summary: Creep and stress relaxation behaviors in granular materials are influenced by the time-dependent changes in their microstructure, with particle shape playing a significant role. However, the effects of particle shape on these behaviors are still not well understood. In this study, 3D DEM models incorporating the rate process theory and superellipsoids are used to simulate creep and stress relaxation in granular samples with different aspect ratios and blockiness. The results show that both aspect ratio and blockiness have a significant influence on creep and stress relaxation, with aspect ratio affecting creep through contact force ratio and blockiness affecting stress relaxation through variation in normal contact force anisotropy. These findings provide insights into the effects of particle shape on creep and stress relaxation in granular assemblies.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Shahab Amanat, Kourosh Gholami, Reza Rafiee-Dehkharghani, Dipanshu Bansal
Summary: This paper investigates the optimal design of wave barriers using the modified non-dominated sorting genetic algorithm-II (NSGA-II) and the Bloch-Floquet theory. The aim is to find the optimal design of plane wave barriers with a wide bandgap at a low-frequency range and low construction cost. The study develops a modified NSGA-II algorithm to determine the optimal arrangement of concrete in wave barrier unit cells. The performance of the optimal barriers is examined through finite element simulation and their efficacy in attenuating plane S-waves is verified.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Yanlin Su, Guoqing Cai, Fengjie Yin, Yepeng Shan, Annan Zhou
Summary: This paper presents a novel elastic-viscoplastic constitutive model that takes into account particle breakage to reproduce the time-dependent behavior of coarse-grained soil. The model integrates the Unified Hardening (UH) model, the elastic-viscoplastic (EVP) model, and the overstress theory. The relationship between particle breakage and loading rate is established, and state variables associated with the critical state of coarse-grained soil are derived to consider both time and particle breakage. A three-dimensional elastic-viscoplastic constitutive model is constructed by combining a one-dimensional viscoplastic hardening parameter with a secondary consolidation coefficient considering particle breakage. The proposed model requires 19 parameters and effectively describes the influence of time-dependency and particle breakage on the shear, dilatancy, and compression behaviors of coarse-grained soil with different confining pressures or initial void ratios. Experimental data comparisons validate the model's ability to replicate the time-dependent behavior of coarse-grained soil.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Shichao Zhang, Yaqiong Wang, Qidong Gao, Xiaobo Ma, Haixiao Zhou, Zhifeng Wang
Summary: Accurately evaluating and predicting ground settlement during tunnel excavation is essential for ensuring tunnel stability. This study conducted a probabilistic analysis of ground settlement under uncertain soil properties. The results demonstrate that spatially variable soils significantly influence the ground settlement in the vertical direction.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Xu Zhang, Bin Luo, Youjun Xu, Zhiwen Yang
Summary: This paper presents an analytical solution for horizontal displacements induced by small radius curve shield tunneling. The formula is derived based on the image method and Mindlin solution, considering additional thrust, frictional resistance, ground loss, and grouting pressure. The solution is validated with on-site data, demonstrating its reliability and providing a new approach for predicting and controlling stratum horizontal displacements in curve shield tunneling. The study finds that ground loss has the most significant influence on displacements, and soil closer to the tunnel exhibits larger horizontal displacements.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Jian-Hong Wan, Ali Zaoui
Summary: Ground vibrations during earthquakes can cause soil strength loss and structural damage. Rubber-soil mixtures (RSM) have shown promise in reducing residual ground deformation. This study used molecular dynamics simulations to investigate the friction behavior of the rubber-clay interface in RSM systems. The results revealed a direct correlation between normal stress and friction force, with denser soil systems exhibiting higher friction forces.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Hongying Wang, Qiang Zhang, Peinan Wu, Yanjing Li, Lijun Han, Guilei Han
Summary: In addition to the Mohr-Coulomb and Hoek-Brown criteria, other nonlinear functions are used to describe the plastic response of rock mass. This paper derived the equivalent cohesive strength, frictional angle, and dilatancy angle for nonlinear yield and plastic flow rock masses. The solution for a circular tunnel in any nonlinear yield and plastic flow rock masses was derived and verified using a numerical procedure. The analysis of strain-softening rock masses under two assumed nonlinear yield criteria was also studied.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Zhijun Wu, You Wu, Lei Weng, Mengyi Li, Zhiyang Wang, Zhaofei Chu
Summary: This study proposed a machine learning approach to predict the uniaxial compression strength (UCS) and elastic modulus (E) of rocks. By measuring meso-mechanical parameters and developing grain-based models, a database with 225 groups of data was established for prediction models. The optimized kernel ridge regression (KRR) and gaussian process regression (GPR) models achieved excellent performance in predicting UCS and E.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Mingjun Zhou, Zhenming Shi, Chong Peng, Ming Peng, Kahlil Fredrick E. Cui, Bo Li, Limin Zhang, Gordon G. D. Zhou
Summary: In this paper, the erosion and deposition processes during overtopping dam breaching are simulated using a novel method (ED-SPH). The proposed model is able to capture the complex behaviors of dam soil erosion, entrainment, and depositions. Soil deposition hinders particle movement and reduces water velocity at the water-soil interface.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
C. Chavez-Negrete, F. J. Dominguez-Mota, R. Roman-Gutierrez
Summary: To accurately simulate groundwater flow in porous layered media, it is important to consider all environmental factors and use a generalized finite differences scheme as a meshless method for spatial discretization. This approach ensures robustness and accuracy of the numerical solution.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Shuairun Zhu, Lulu Zhang, Lizhou Wu, Lin Tan, Haolong Chen
Summary: This paper investigates the effectiveness of the cascadic multigrid method applied to the improved Picard iteration method for solving nonlinear problems in deforming variably saturated porous media. Two improved Picard iteration methods are proposed, and their effectiveness is verified through numerical examples. The results show that the improved methods have faster convergence and higher computational efficiency compared to the classical method.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Yuan Cao, Yan-Guo Zhou, Kyohei Ueda, Yun-Min Chen
Summary: Investigated shear stress responses of enclosed soil in deep soil mixing (DSM) grid-improved ground, and revealed the characteristics of the waist effect and mathematical model for shear stress reduction ratio.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Jinfan Chen, Zhihong Zhao, Jintong Zhang
Summary: This study develops data-driven criteria to estimate the peak shear strength (PSS) of rock fractures, considering the effects of surface roughness features. A high-quality dataset is created using particle-based discrete element method and diamond-square algorithm. Tree-based models and convolutional neural network are trained to predict the PSS of rock fractures, and their reliability is verified using experimental data.
COMPUTERS AND GEOTECHNICS
(2024)