A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Physical Model Tests of Expansive Soil Slope
A series of large-scale static model tests of compacted expansive soil slope were conducted with real-time monitoring of water content, swelling deformation, and soil pressure. The monitoring results suggested that the distribution of water content in the slope was nonuniform in space and time, thus resulting in the nonuniform distribution of swelling deformation at the drying-wetting interface. According to the survey of failure surface by excavation after landslide, it could be observed that, local shear rupture firstly took place at the drying-wetting interface within the shallow layer of slope, and then extended downwards gradually as water infiltrates downwards, multiple shear sliding surfaces were produced at different depths and different areas and they were further connected with each other. Eventually, an overall landslide of the slope occurred. Traditional limit equilibrium method could not correctly reflect the progressive landslide of expansive soil slope. Finite Element Method with expansive model was adopted and the safety factor of the static model test slope was calculated as 0.92 using strength reduction technique. Both physical model tests and finite element analysis prove that the swelling deformation plays an important role in expansive soil slope stability when over-consolidation effect and fissure presence are not considered.
Physical Model Tests of Expansive Soil Slope
A series of large-scale static model tests of compacted expansive soil slope were conducted with real-time monitoring of water content, swelling deformation, and soil pressure. The monitoring results suggested that the distribution of water content in the slope was nonuniform in space and time, thus resulting in the nonuniform distribution of swelling deformation at the drying-wetting interface. According to the survey of failure surface by excavation after landslide, it could be observed that, local shear rupture firstly took place at the drying-wetting interface within the shallow layer of slope, and then extended downwards gradually as water infiltrates downwards, multiple shear sliding surfaces were produced at different depths and different areas and they were further connected with each other. Eventually, an overall landslide of the slope occurred. Traditional limit equilibrium method could not correctly reflect the progressive landslide of expansive soil slope. Finite Element Method with expansive model was adopted and the safety factor of the static model test slope was calculated as 0.92 using strength reduction technique. Both physical model tests and finite element analysis prove that the swelling deformation plays an important role in expansive soil slope stability when over-consolidation effect and fissure presence are not considered.
Physical Model Tests of Expansive Soil Slope
Cheng, ZhanLin (author) / Ding, Jinhua (author) / Rao, Xibao (author) / Cheng, Yonghui (author) / Xu, Han (author)
Geo-Congress 2013 ; 2013 ; San Diego, California, United States
Geo-Congress 2013 ; 731-740
2013-02-25
Conference paper
Electronic Resource
English
Physical Model Tests of Expansive Soil Slope
| British Library Conference Proceedings | 2013