Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Three-dimensional active earth pressure for retaining structures in soils subjected to steady unsaturated seepage effects
https://orcid.org/http://orcid.org/0000-0003-3884-4893
In extant studies, most of the analyses on active earth pressure focused on dry or saturated soils using two-dimensional failure mechanisms. However, in practice, soils are usually unsaturated, and all failures of retained soil masses indicate a somewhat three-dimensional (3D) feature. This work adopts the kinematic limit analysis method to evaluate the active earth pressure with considering the 3D effect and the presence of vertical steady unsaturated seepage. A closed-form framework for describing the profile of suction stress is adopted, and an extended form of the Mohr–Coulomb failure criterion is introduced to represent the unsaturated soil strength. In the context of a 3D horn-like collapse mechanism, the resultant of active earth pressure is evaluated and expressed as a dimensionless coefficient. Several charts are provided for parametric studies. The obtained results indicate that accounting for either the presence of unsaturated seepage or the 3D effect can lead to a more economical result. This study considers a more realistic service behavior of retaining structures and presents a useful solution for the 3D active earth pressure under unsaturated seepage conditions.
Three-dimensional active earth pressure for retaining structures in soils subjected to steady unsaturated seepage effects
https://orcid.org/http://orcid.org/0000-0003-3884-4893
In extant studies, most of the analyses on active earth pressure focused on dry or saturated soils using two-dimensional failure mechanisms. However, in practice, soils are usually unsaturated, and all failures of retained soil masses indicate a somewhat three-dimensional (3D) feature. This work adopts the kinematic limit analysis method to evaluate the active earth pressure with considering the 3D effect and the presence of vertical steady unsaturated seepage. A closed-form framework for describing the profile of suction stress is adopted, and an extended form of the Mohr–Coulomb failure criterion is introduced to represent the unsaturated soil strength. In the context of a 3D horn-like collapse mechanism, the resultant of active earth pressure is evaluated and expressed as a dimensionless coefficient. Several charts are provided for parametric studies. The obtained results indicate that accounting for either the presence of unsaturated seepage or the 3D effect can lead to a more economical result. This study considers a more realistic service behavior of retaining structures and presents a useful solution for the 3D active earth pressure under unsaturated seepage conditions.
Three-dimensional active earth pressure for retaining structures in soils subjected to steady unsaturated seepage effects
https://orcid.org/http://orcid.org/0000-0003-3884-4893
In extant studies, most of the analyses on active earth pressure focused on dry or saturated soils using two-dimensional failure mechanisms. However, in practice, soils are usually unsaturated, and all failures of retained soil masses indicate a somewhat three-dimensional (3D) feature. This work adopts the kinematic limit analysis method to evaluate the active earth pressure with considering the 3D effect and the presence of vertical steady unsaturated seepage. A closed-form framework for describing the profile of suction stress is adopted, and an extended form of the Mohr–Coulomb failure criterion is introduced to represent the unsaturated soil strength. In the context of a 3D horn-like collapse mechanism, the resultant of active earth pressure is evaluated and expressed as a dimensionless coefficient. Several charts are provided for parametric studies. The obtained results indicate that accounting for either the presence of unsaturated seepage or the 3D effect can lead to a more economical result. This study considers a more realistic service behavior of retaining structures and presents a useful solution for the 3D active earth pressure under unsaturated seepage conditions.
Three-dimensional active earth pressure for retaining structures in soils subjected to steady unsaturated seepage effects
Acta Geotech.
Li, Zhengwei (Autor:in) / Yang, Xiaoli (Autor:in)
Acta Geotechnica ; 15 ; 2017-2029
01.07.2020
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
3D rotational collapse mechanism , Active earth pressure , Limit analysis , Retaining structure , Unsaturated steady seepage Engineering , Geoengineering, Foundations, Hydraulics , Solid Mechanics , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics
Seismic Active Earth Pressure in Saturated Soil Subjected to Steady Seepage
| British Library Online Contents | 2011
Active Earth Pressures for Unsaturated Retaining Structures
| Online Contents | 2015