地下水对地基不均匀沉降的影响  

Influence of the groundwater to non-uniform settlement of subgrade

作　　者：李伟雄[1] 周朝阳[1] 余忠[2] 

机构地区：[1]中南大学土建学院,湖南长沙410075 [2]湖南建材高等专科学校,湖南衡阳421008

出　　处：《四川建筑科学研究》2006年第5期115-118,共4页Sichuan Building Science

基　　金：湖南省教育厅科研资助项目(04C032)

摘　　要：针对地基的地下水的不良影响,对土的渗透系数和渗透力进行了分析,指出了地下水的渗流对地基不均匀沉降的影响较大。当天然土具有较强透水性时,易造成地下水流对地基的冲刷。对地基中地下水位的变化的影响进行了分析,提出了地下水在基底下压缩层范围内变化可降低土的极限荷载,地下水在换土垫层范围内变化可降低周围软弱土侧向支承力。With the groundwater influence to foundation, the coefficient of permeability and the seepage force of soil were analysed. It is pointed out that groundwater has great influence to the non-uniform settlement. When it has strong permeabihty in natural soil, the groundwater regime would wash the subgrade. The influence of variety of ground water level in foundation was analysed. The variety of ground water level in the scope of compressed layer can reduce the limiting load. The variety of groundwater in the scope of cushion can reduce the lateral supporting force.

关 键 词：渗透系数 渗透力 地下水位 极限荷载 

分 类 号：TU46[建筑科学—结构工程]