Journal
JOURNAL OF HYDRODYNAMICS
Volume 26, Issue 1, Pages 155-164Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/S1001-6058(14)60018-4
Keywords
Biot's consolidation; viscoelastic plasticity; groundwater; land subsidence; ground fissure
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Funding
- Jiangsu Special Fund [dk2012ky01]
- Hebei Grand Special Fund [CZCG2012055]
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In order to study the influences of hydraulic and mechanical parameters on land subsidence and ground fissure caused by groundwater exploitation, based on the Biot's consolidation theory and combined with the nonlinear rheological theory of soil, the constitutive relation in Biot's consolidation theory is extended to include the viscoelastic plasticity, and the dynamic relationship among the porosity, the hydraulic conductivity, the parameters of soil deformation and effective stress is also considered, a three-dimensional full coupling mathematical model is established and applied to the study of land subsidence and ground fissures of Cangzhou in Hebei Province, through the analysis of parameter sensitivity, the influences of soil hydraulic and mechanical parameters on land subsidence and ground fissure are revealed. It is shown that the elastic modulus E, the Poisson ratio v, the specific yield mu and the soil cohesion c have a great influence on the land subsidence and the ground fissures. In addition, the vertical hydraulic conductivity k(z) and the horizontal hydraulic conductivity k(s) also have a great influence on the land subsidence and the ground fissures.
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