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Analysis of Cylindrical Cavity Expansion in Partially Saturated Soils
This paper presents an elastoplastic solution for undrained expansion of a cylindrical cavity in unsaturated soils. The classical Barcelona basic model has been used to model the mechanical behaviour of the unsaturated soil. The hydraulic behaviour of the soil during cavity expansion coupling with the mechanical behaviour is modeled through a void ratio dependent soil-water characteristic curve. With aid of an auxiliary variable, the problem is finally formulated as a system of first-order ordinary differential equations, and solved as an initial value problem. A parametric study is performed to investigate the effects of suction on the distributions of the stress variables and the expansion responses at the cavity wall during cavity expansion. The results show that the suction has significant effects on the expansion responses of the soil around the cavity. The proposed solution is expected to be able to better interpret the corresponding pressuremeter test data and pile installation effects in unsaturated soils.
Analysis of Cylindrical Cavity Expansion in Partially Saturated Soils
This paper presents an elastoplastic solution for undrained expansion of a cylindrical cavity in unsaturated soils. The classical Barcelona basic model has been used to model the mechanical behaviour of the unsaturated soil. The hydraulic behaviour of the soil during cavity expansion coupling with the mechanical behaviour is modeled through a void ratio dependent soil-water characteristic curve. With aid of an auxiliary variable, the problem is finally formulated as a system of first-order ordinary differential equations, and solved as an initial value problem. A parametric study is performed to investigate the effects of suction on the distributions of the stress variables and the expansion responses at the cavity wall during cavity expansion. The results show that the suction has significant effects on the expansion responses of the soil around the cavity. The proposed solution is expected to be able to better interpret the corresponding pressuremeter test data and pile installation effects in unsaturated soils.
Analysis of Cylindrical Cavity Expansion in Partially Saturated Soils
Chen, Shengli (author) / Li, Lin (author) / Zhang, Zhongjie (author)
Geo-Congress 2020 ; 2020 ; Minneapolis, Minnesota
Geo-Congress 2020 ; 309-319
2020-02-21
Conference paper
Electronic Resource
English
Analysis of Cylindrical Cavity Expansion in Partially Saturated Soils
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