Article
Engineering, Geological
Jianhong Man, Mingliang Zhou, Dongming Zhang, Hongwei Huang, Jiayao Chen
Summary: This paper presents a 2D analytical model for estimating the face stability of a rock tunnel in the presence of stratified rock masses. The results indicate that the thickness of the rock layer, tunnel diameter, and arrangement sequence of weak and strong rock layers significantly affect the tunnel face stability.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Pooyan Jafari, Ahmad Fahimifar
Summary: This paper investigates the face stability of rectangular shield-driven tunnels in undrained clays, where the undrained shear strength increases linearly with depth. Two new failure mechanisms are proposed based on the translational movement of rigid blocks and continuous deformation of soil mass. The analytical solutions are compared with numerical simulations and existing approaches in the literature to evaluate their validity. The critical support pressures obtained from the analytical models are consistent with numerical simulations, and simple design formulas are provided for practical use. Parametric studies explore the impact of different geometrical and geotechnical parameters on tunnel face stability.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Engineering, Civil
Cheng Cheng, Pengjiao Jia, Pengpeng Ni, Yingchao Wang, Wen Zhao, Yongping Guan, Bo Lu
Summary: In this study, the finite difference method is used to investigate the face stability of longitudinally inclined shield tunnel in dense sand strata. A novel two-dimensional failure mechanism is proposed, and a scale factor is introduced to quantify the three-dimensional behavior. The improved 2D failure mechanism provides reasonable prediction for longitudinally inclined tunnel.
TRANSPORTATION GEOTECHNICS
(2023)
Article
Construction & Building Technology
Shiqin Tu, Wei Li, Chengping Zhang, Wen Chen
Summary: This article improves a 3D rotating rigid body collapse mechanism based on limit analysis using discretization technique, in order to evaluate the stability of tunnel face when shield tunnel is excavated along inclined layered soil. The results show that the existence of inclined stratum results in asymmetric failure mechanism of tunnel face and variation of active failure pressure.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Computer Science, Interdisciplinary Applications
Marcin Chwala
Summary: This paper introduces the use of kinematical failure mechanisms to analyze the slope stability of spatially variable soil, providing high numerical efficiency of the algorithm implementation. Two failure mechanisms were considered, with one successfully applied to a wide range of slope conditions. The proposed method shows promising applications in the area of slope reliability analysis.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Shuai Yuan, Dewang Feng, Senhao Zhang, Rongan Lin
Summary: In this study, a unified three-dimensional upper bound finite element method is established to assess the support pressure of tunnels around leaking pipelines in subway construction. The research shows that the limit support pressure of the tunnel can rapidly increase after pipeline leakage, and there is a close correlation between the limit support pressure and the pore water pressure at the head of the tunnel.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Construction & Building Technology
ZeRun Tian, YanHong Zhang, XiTong Wei, Fei Li, YaFeng Guo
Summary: The critical height equations for layered slope are derived using an upper limit theorem and rotational or rotational and translational failure mechanisms. The stability coefficients of layered slope are investigated, and the presented approach is found to have better performance and accuracy compared to other methods. Several examples are analyzed to assess the stability of layered slope, and measures to improve the smoothness of the sliding surface are reviewed.
ADVANCES IN CIVIL ENGINEERING
(2023)
Article
Engineering, Civil
Pengfei Li, Xiaopu Cui, Junwei Xia, Xinyu Wang
Summary: This paper focuses on theoretical analytical models to calculate the limit support pressure and vertical earth pressure on the cutting face for tunnels. The failure zone is divided into two parts, and the limit support pressure calculation equation is derived. The rationality of the theoretical model is verified through comparison with existing theory, numerical simulation, and centrifugal test.
Article
Construction & Building Technology
Zhen Wang
Summary: This paper explores the stability of multi-step high steep slope by considering the layer distribution of soil and building a slope failure mechanism. It derives the calculation method of external force power and internal energy dissipation power in the failure area and proposes a loop algorithm for slope stability analysis. The paper also develops a slope stability calculation system of upper bound limit analysis combined with computer programming technology. The results show that the calculation system has high accuracy in stability analysis and the upper bound limit analysis has strong reference values in engineering practice.
ADVANCES IN CIVIL ENGINEERING
(2023)
Article
Engineering, Mechanical
J. Y. Zuo, B. T. Wang, W. W. Li, H. X. Zhang
Summary: In this study, the log-spiral rotational mechanism is extended for layered slopes by using a multicenter method that focuses on the variations of slip surfaces between adjacent soil layers. The proposed mechanism has fewer rigid blocks and provides smaller factors of safety compared to other published mechanisms. The slip surfaces obtained by the proposed method also align well with the plastic zones obtained by the finite element method. The influence of nonassociated flow rule on a two-layer slope is also considered in the study.
JOURNAL OF ENGINEERING MECHANICS
(2022)
Article
Metallurgy & Metallurgical Engineering
An Yong-lin, Zhou Jin, Ouyang Peng-bo, Li Jia-hao
Summary: This study investigated the tunnel face stability under an advanced pipe, finding that increasing pipe diameter, reducing initial displacement, and using short round length and small excavation height can improve stability. The study also analyzed tunnel face deformation characteristics and discussed the influence of various parameters on tunnel stability.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2021)
Article
Chemistry, Multidisciplinary
Miao Yu, Wei Liu, Ben Wu, Jiajia Yan, Penglu Gan
Summary: This paper proposes a theoretical model for the stability analysis of a box tunnel face in non-cohesive soils. The model takes into consideration the uneven distribution of support pressure caused by multiple cutter heads and screw conveyors. Through parametric analysis and numerical comparisons, the rationality of the proposed model in predicting collapse geometry is verified.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Mechanical
Qianwei Xu, Jinli Xie, Lianyang Zhang, Xiang He, Linhai Lu, Yuanhai Li
Summary: Shield construction plays a crucial role in underground infrastructure development, but it can lead to excavation face instability and surface subsidence. This paper investigates the mechanisms influencing these issues during shield construction in a sand cobble stratum using the discrete element method (DEM). The study explores the impact of support pressure and cutters on excavation face stability and highlights the distinct behavior of surface subsidence compared to excavation face instability.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Geological
Yanru Zhao, Xiaojiao Li, Pei Tai, Liping Huang, Bo Pu, Rui Chen
Summary: This study developed a novel analytical solution for analyzing the roof collapse of deep cavities in unsaturated soils based on the upper bound theorem and the nonlinear Mohr-Coulomb criterion. The results showed that matric suction and soil type have significant influences on the stability of deep cavities.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2022)
Article
Computer Science, Interdisciplinary Applications
Zixian Jin, Chengping Zhang, Wei Li, Shiqin Tu, Libin Wang, Saixu Wang
Summary: This paper investigates the impact of excavation stability on base heave failure using both numerical and analytical methods. It proposes a rigid block rotational failure mechanism based on the analysis of numerical results, and develops an analytical formula for the safety factor of excavation stability. The influences of soil and excavation conditions on stability are analyzed, and a rigid block rotational failure mechanism is proposed for stratified stratum. The results demonstrate the effectiveness of the proposed mechanism in calculating safety factor and providing a continuous and smooth failure surface.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Mathematics, Applied
Bettina Albers, Pavel Krejci
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2016)
Article
Mathematics, Applied
Bettina Detmann, Pavel Krejci, Elisabetta Rocca
SIAM JOURNAL ON MATHEMATICAL ANALYSIS
(2016)
Article
Engineering, Mechanical
Yao Shan, Bettina Albers, Shunhua Zhou, Stavros A. Savidis
VEHICLE SYSTEM DYNAMICS
(2017)
Article
Mechanics
Bettina Detmann
MECHANICS RESEARCH COMMUNICATIONS
(2018)
Biographical-Item
Mechanics
Bettina Albers, Erich Bauer, Joe D. Goddard, Stefan Luding
Review
Mechanics
Bettina Albers
Article
Mathematics, Applied
Bettina Detmann, Pavel Krejci
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2019)
Article
Engineering, Chemical
Bojan Pelivanoski, Bettina Detmann, Kristoffer Ooms, Mari Winkler, Ekaterina Vasyukova, Martin Denecke
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2020)
Review
Thermodynamics
Bettina Detmann
Summary: The paper presents different theories of porous media, including mixture theory, Bowen theory, and Biot theory, as well as the use of reaction-diffusion equations by mathematicians. It focuses on approaches based on mixture theory that incorporate chemical reactions, different strategies to describe chemical potential for mixtures, and various viewpoints on the use of the second law of thermodynamics for mixtures. Finally, it summarizes several works that involve chemical reactions in porous media.
CONTINUUM MECHANICS AND THERMODYNAMICS
(2021)
Article
Mathematics, Applied
Bettina Detmann, Chiara Gavioli, Pavel Krejci, Jan Lamac, Yuliya Namlyeyeva
Summary: The study presents a mathematical model for filling the pores of building materials with the aim of improving the consistency of porous solids. The model demonstrates the existence of a solution for each initial data from a physically relevant class and shows qualitative agreement with experimental observations.
NONLINEAR ANALYSIS-REAL WORLD APPLICATIONS
(2022)
Proceedings Paper
Physics, Applied
Bettina Albers
MURPHYS-HSFS-2014: 7TH INTERNATIONAL WORKSHOP ON MULTI-RATE PROCESSES & HYSTERESIS (MURPHYS) & THE 2ND INTERNATIONAL WORKSHOP ON HYSTERESIS AND SLOW-FAST SYSTEMS (HSFS)
(2016)
Article
Engineering, Multidisciplinary
Wei Liu, Bettina Albers, Yu Zhao, Xiao-wu Tang
JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A
(2016)
Proceedings Paper
Engineering, Geological
Bettina Albers
GEOMECHANICS FROM MICRO TO MACRO, VOLS I AND II
(2015)
Proceedings Paper
Mathematics, Applied
Bettina Albers
11TH WORLD CONGRESS ON COMPUTATIONAL MECHANICS; 5TH EUROPEAN CONFERENCE ON COMPUTATIONAL MECHANICS; 6TH EUROPEAN CONFERENCE ON COMPUTATIONAL FLUID DYNAMICS, VOLS II - IV
(2014)
