Influences of soil hydraulic and mechanical parameters on land subsidence and ground fissures caused by groundwater exploitation

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• 作者：Xing-xian CHEN (())^a ; ^b ; ^{js_cxx@sina.com" class="auth_mail}Author Vitae ; Zu-jiang LUO (())^c ; Shi-ling ZHOU (())^c
• 关键词：Biot's consolidation ; viscoelastic plasticity ; groundwater ; land subsidence ; ground fissure
• 刊名：Journal of Hydrodynamics, Ser. B
• 出版年：February, 2014
• 年：2014
• 卷：26
• 期：1
• 页码：155-164
• 全文大小：3468 K

文摘

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 threedimensional 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 渭 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.