非均质土坝稳定性的渗流场和应力场耦合分析  

Coupling analysis of heterogeneous earth dam stability of seepage field and stress field

作　　者：陈晓平[1] 茜平一[2] 梁志松[2] 张芳枝[2] 吴起星[1] 

机构地区：[1]暨南大学土木工程系,广东广州510632 [2]广东水利电力职业技术学院,广东广州510635

出　　处：《岩土力学》2004年第6期860-864,共5页Rock and Soil Mechanics

基　　金：广东省自然科学基金资助(编号:021145)

摘　　要：基于多孔介质的渗流特性和土的非线性本构关系,研究了渗流场与应力场的耦合效应,并针对一实际土坝建立了非线性耦合分析模型,探讨了位于软基之上的非均质土坝的渗流与应力耦合规律。分析结果表明,在渗流作用下,坝体和坝基中渗流与应力的相互作用是不应忽视的,其作用结果将会使土坝、特别是防渗心端附近应力水平和渗透坡降均有不同程度的提高,表明考虑渗流场和应力场耦合作用的计算结果对土坝稳定安全性不利。Based on the seepage characteristics of porous media and nonlinear constitutive relation, the coupling effect of seepage field and stress field is studied. And according to a real heterogeneous earth dam on soft foundation, a mathematical model of nonlinear coupling analysis is established; and the coupling laws about seepage and stress are studied. The results show that under seepage, the interaction of seepage and stress can't be ignored; it can result in the increase of stress level and seepage velocity, especially nearby the water-tight core. The results make it known that the security of earth dam stability can be reduced when the coupling effect of seepage field and stress field is considered.

关 键 词：非均质土坝 耦合分析 渗流场 应力场 

分 类 号：TU411[建筑科学—岩土工程]