Dilatancy Characteristics and Constitutive Modelling of the Unsaturated Soil Based on Changes in the Mass Water Content
| Autor: | Zhaoyang Song, Chongbang Xu, Xiao Xu, Guoqing Cai, Chengang Zhao, Jian Li, Hualao Wang |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Dilatant
Technology Materials science QH301-705.5 QC1-999 Constitutive equation 0211 other engineering and technologies constitutive modelling 02 engineering and technology Silt 021105 building & construction soil mechanics General Materials Science Geotechnical engineering Biology (General) QD1-999 Instrumentation Water content Soil mechanics 021101 geological & geomatics engineering Fluid Flow and Transfer Processes mass water content Physics Process Chemistry and Technology Degree of saturation General Engineering stress–dilatancy relationship Engineering (General). Civil engineering (General) Overburden pressure Computer Science Applications Shear (sheet metal) Chemistry TA1-2040 unsaturated soil minimum dilatancy rate |
| Zdroj: | Applied Sciences Volume 11 Issue 11 Applied Sciences, Vol 11, Iss 4859, p 4859 (2021) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app11114859 |
| Popis: | Most soil mechanics theories are limited to strain hardening and shrinkage under high compressive stresses, and there are some shortcomings in the selection of suction or degree of saturation as the water content state varies in the constitutive models of unsaturated soil. Based on the triaxial shear tests of unsaturated compacted soil (a silt of high plasticity) with different water content and confining pressure (low-confining), a shear dilatancy model of unsaturated soil based on the mass water content is proposed in this paper. The influence of the water content on the shear deformation characteristics of the unsaturated soil is analysed. The stress–dilatancy relationship and the prediction equation of the minimum dilatancy rate of the unsaturated soil under different water content and different confining pressure are provided. Selecting the mass water content as the state variable, a constitutive model suitable for the dilatancy of unsaturated soil is established. The method of determining model parameters based on the mass water content is analysed. The applicability of the model is verified by comparisons between the predicted and experimental results. |
| Databáze: | OpenAIRE |
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