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工程降水引起地基固结沉降三维数值分析

DOI: 10.16411/j.cnki.issn1006-7736.2015.02.022, PP. 123-128

Keywords: 工程降水,渗透系数,固结沉降,FLAC3D,流固耦合

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Abstract:

为保证施工现场条件的干燥性,必须采取措施降低地下水水位,但是降水后会引起土体的固结沉降,对地面早已存在的建筑物构成潜在的威胁.工程降水施工诱发地基沉降是一个三维空间流固耦合问题,借助三维有限差分数值模拟软件FLAC3D建立地层降水过程中渗流场与应力场耦合模型,以金普线地铁隧道8标降水工程为例进行数值模拟,探究土体在饱和状态下改变地层渗透系数达到渗流稳定时的沉降和地下水分布特征.

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