含裂隙非饱和土体的变形与渗流耦合的二维解析分析  

TWO DIMENSIONAL ANALYTICAL MODEL OF COUPLED DEFORMATION AND SEEPAGE IN UNSATURATED SOILS WITH FISSURES

作　　者：陈臻林[1] 任欢 甯尤军 CHEN Zhen-lin;REN Huan;NING You-jun(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology*Chengdu 610059,China;Southwest Petroleum University,School of Mechanical and Wlectrical Engineering.Chengdu 610500,China)

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059 [2]西南石油大学机电工程学院,成都610500

出　　处：《地质灾害与环境保护》2019年第4期29-35,共7页Journal of Geological Hazards and Environment Preservation

基　　金：国家自然科学创新研究群体科学基金(41521002);国家自然科学基金面上项目(41572288);地质灾害防治与地质环境保护国家重点实验室自主研究课题(SKLGP2013Z002)

摘　　要：含裂隙土体在降雨条件下的渗流规律相对比较复杂,为进一步讨论含裂隙土体渗流机制,在一维解析解的基础上,建立二维饱和-非饱和含裂隙土渗流解析模型,并通过Fourier积分变化推导出二维渗流控制方程的显式解析解。此解析解考虑了多裂隙情况下的孔隙水压力分布和流量边界条件。二维解析解能够准确地获得渗流和变形耦合非饱和土中水的入渗影响规律,并进一步讨论了降雨条件下,不同裂隙模式(裂隙深度、裂隙发育位置及裂隙密集程度)对坡体渗流的影响规律,探讨了含裂隙区域的孔隙水压力分布规律。The mechanism of seepage for fractured soil is definitely complex under rainfall conditions. In order to investigate the mechanism of seepage, a two-dimensional saturated-unsaturated fissure-soil seepage model is built and an explicit analytical solution to the two-dimensional seepage control equation is obtained by Fourier integration based on the current research work. Pore-water distributions and flux boundary conditions are considered for multiple fissures. The effect of water infiltration on coupled deformation and seepage in unsaturated soils could be obtained accurately by two dimensional Analytical model. We further discussed the influence rules of seepage for different fracture modes(depth, position and density) and the distribution of pore-water pressure under rainfall.

关 键 词：饱和-非饱和 裂隙 解析解 孔隙水压力 

分 类 号：TU43[建筑科学—岩土工程]