51. A Framework for Interpreting Lateral Swelling Pressure in Unsaturated Expansive Soils
- Author
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Jin Junwei, Li Mingyu, Yunlong Liu, and Wei Yanqing
- Subjects
021110 strategic, defence & security studies ,Article Subject ,Expansive clay ,0211 other engineering and technologies ,Foundation (engineering) ,Swelling pressure ,02 engineering and technology ,Engineering (General). Civil engineering (General) ,Key factors ,Geotechnical engineering ,Boundary value problem ,TA1-2040 ,Pile ,Civil infrastructure ,Soil mechanics ,Geology ,021101 geological & geomatics engineering ,Civil and Structural Engineering - Abstract
Lateral swelling pressure (LSP) develops when expansive soil volume increment associated with water infiltration is restrained in a confined domain, for example, due to construction of civil infrastructure. In this paper, initially a flowchart is developed to highlight various key factors that influence the LSP mobilization according to lab and field studies collected from previous literature studies. Then extending unsaturated soil mechanics, a theoretical framework is proposed for illustrating the LSP mobilization in the field against retaining structures and pile foundations under different boundary conditions, respectively. An example problem for a basement wall and a pile foundation constructed in a typical expansive soil from Regina, Canada, is presented to illustrate the proposed theoretical framework. The framework and corresponding analysis presented in this paper can facilitate to provide rational designs of geotechnical infrastructures in expansive soils.
- Published
- 2021