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目前,60%以上的场地破坏都与地下水有关。巨大水头差会导致开挖区周边地下水流动,对基坑周围的建筑物稳定性影响较大,研究地下水对场地变形的影响具有重要意义。基于多孔介质与孔隙流体耦合方法,建立场地变形有限元模型,将地层设置为多孔介质材料,分析地层渗透系数对场地变形的影响。结果表明,随着渗透系数的变大,场地有效应力增加,地下水流速变大,但场地位移和应变值变小。
At present, more than 60% of the site damage is related to groundwater. Large head difference will lead to groundwater flow around the excavation area, affecting the stability of the buildings around the foundation pit, and studying the impact of groundwater on the deformation of the site is of great significance. Based on the coupled method of porous media and pore fluid, the finite element model of site deformation was established. The formation was set as porous media, and the influence of formation permeability coefficient on site deformation was analyzed. The results show that with the increase of permeability coefficient, the effective stress of site increases and the velocity of groundwater becomes larger, but the displacement and strain of site become smaller.