Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Analytical solution for displacement-dependent 3D earth pressure on flexible walls of foundation pits in layered cohesive soil
https://orcid.org/http://orcid.org/0000-0002-2446-100X
This paper proposes a calculation method of displacement-dependent three-dimensional (3D) earth pressure on flexible walls of the foundation pits, further considering spatial effects, layered cohesive soil, and seepage effect on earth pressure. Based on improved Coulomb’s earth pressure theory, the displacement-dependent 2D earth pressure model for flexible walls is established. By introducing the concepts of spatial influence factor and plane strain ratio (PSR), the calculation model of displacement-dependent earth pressure on flexible walls of foundation pit considering spatial effects is further proposed. And the displacement-controlled solutions of earth pressure under different boundary conditions are obtained. The proposed solution is verified by numerical simulations and reported test data of foundation pit and shows good agreement. The traditional 2D earth pressure theory underestimates and overestimates the active and passive earth pressure in the corner effect area of the excavation, respectively. Through parameter analysis and discussion, the parameter effects on 3D earth pressure are ranked as soil cohesion > soil friction angle > wall friction angles. The results of the study provide an important theoretical basis for the 3D design calculation of foundation pits.
Analytical solution for displacement-dependent 3D earth pressure on flexible walls of foundation pits in layered cohesive soil
https://orcid.org/http://orcid.org/0000-0002-2446-100X
This paper proposes a calculation method of displacement-dependent three-dimensional (3D) earth pressure on flexible walls of the foundation pits, further considering spatial effects, layered cohesive soil, and seepage effect on earth pressure. Based on improved Coulomb’s earth pressure theory, the displacement-dependent 2D earth pressure model for flexible walls is established. By introducing the concepts of spatial influence factor and plane strain ratio (PSR), the calculation model of displacement-dependent earth pressure on flexible walls of foundation pit considering spatial effects is further proposed. And the displacement-controlled solutions of earth pressure under different boundary conditions are obtained. The proposed solution is verified by numerical simulations and reported test data of foundation pit and shows good agreement. The traditional 2D earth pressure theory underestimates and overestimates the active and passive earth pressure in the corner effect area of the excavation, respectively. Through parameter analysis and discussion, the parameter effects on 3D earth pressure are ranked as soil cohesion > soil friction angle > wall friction angles. The results of the study provide an important theoretical basis for the 3D design calculation of foundation pits.
Analytical solution for displacement-dependent 3D earth pressure on flexible walls of foundation pits in layered cohesive soil
https://orcid.org/http://orcid.org/0000-0002-2446-100X
This paper proposes a calculation method of displacement-dependent three-dimensional (3D) earth pressure on flexible walls of the foundation pits, further considering spatial effects, layered cohesive soil, and seepage effect on earth pressure. Based on improved Coulomb’s earth pressure theory, the displacement-dependent 2D earth pressure model for flexible walls is established. By introducing the concepts of spatial influence factor and plane strain ratio (PSR), the calculation model of displacement-dependent earth pressure on flexible walls of foundation pit considering spatial effects is further proposed. And the displacement-controlled solutions of earth pressure under different boundary conditions are obtained. The proposed solution is verified by numerical simulations and reported test data of foundation pit and shows good agreement. The traditional 2D earth pressure theory underestimates and overestimates the active and passive earth pressure in the corner effect area of the excavation, respectively. Through parameter analysis and discussion, the parameter effects on 3D earth pressure are ranked as soil cohesion > soil friction angle > wall friction angles. The results of the study provide an important theoretical basis for the 3D design calculation of foundation pits.
Analytical solution for displacement-dependent 3D earth pressure on flexible walls of foundation pits in layered cohesive soil
Acta Geotech.
Han, Meng (Autor:in) / Chen, Xiangsheng (Autor:in) / Jia, Jinqing (Autor:in)
Acta Geotechnica ; 19 ; 5249-5275
01.08.2024
27 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
3D earth pressure , Displacement-dependent earth pressure , Foundation pit , Flexible walls , Spatial effects Engineering , Geoengineering, Foundations, Hydraulics , Solid Mechanics , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics
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