土水特征曲线在非饱和土一维固结理论中的应用  

Numerical Solution and Analysis of One-dimensional Consolidation of Unsaturated Soil with SWCC

作　　者：苏万鑫[1] 谢康和[1] 

机构地区：[1]浙江大学软弱土与环境土工教育部重点实验室,杭州310027

出　　处：《科技通报》2010年第4期563-568,共6页Bulletin of Science and Technology

基　　金：浙江省自然科学基金重点项目(No.Z5080175);国家教育部高校博士点基金项目(No.20070335179)

摘　　要：采用Bishop有效应力原理,将Fredlund土水特征曲线模型应用在固结方程中,提出了非饱和土一维固结理论。假定土体固结分为两个阶段。第一阶段为不排水、不排气阶段,土体的变形只是因为气体的被压密而引起的。第二阶段为排水、排气阶段,土体的变形是因为孔隙水和孔隙气的排出而引起的,在此过程的基础上,建立了非饱和土一维固结方程,并进行了数值求解。Based on Bishop effective stress principle, a consolidation theory of unsaturated soil is proposed in this paper that incorporates the soil-water characteristic curve （SWCC） proposed by Fredlund. Two stages in consolidation process of unsaturated soil were assumed. At the first stage, neither water nor air was drained, and the deformation of soil was on- ly caused by compression of air. At the second stage, the deformation of soil was induced by drainage of pore-water and pore-air. And then,a one-dimensional consolidation equation system for unsaturated soil and its numerical solutions at this stage were presented.

关 键 词：非饱和土 一维问题 固结 有效应力原理 土水特征曲线 数值解 

分 类 号：TU443[建筑科学—岩土工程]