地下水位波动条件下粉土地基变形特性试验研究

针对我国沿海城市地下水波动引发地面沉降灾害频发的特点，以上海第四纪沉积粉土为研究对象，通过室内模型试验模拟地下水位波动和建筑物荷载变化，取得了模型箱内粉土地基变形实测数据。在此基础上分析了在水位波动与荷载变化耦合作用下粉土地基的变形特点，获取了水位波动下粉土地基变形及其与荷载、孔隙比、压缩模量、渗透系数间的相关关系。研究结论可为城市地面沉降危害的防治提供参考。

Test study on deformation characteristics of silt - soil foundation under condition of groundwater fluctuation

Considering the frequent ground subsidence events caused by groundwater fluctuation in coastal cities of China,a series of laboratory model tests taking Shanghai Quaternary sedimentary silt soil as the object are carried out for simulating the groundwater fluctuation and the building load variation.The deformation characteristics of silt-soil foundation under the coupling effect of groundwater fluctuation and building load are analyzed with collecting the deformation data of the silt-soil foundation in the model box.The deformation variation laws of silt-soil foundation with load,void ratio,compression modulus and permeability coefficient under the groundwater fluctuation are acquired.The result conclusion can be used as a reference for controlling the disaster of city ground subsidence.