降雨条件下裂隙各向异性对坡积土边坡渗流的影响分析  

Analysis of Effect on Seepage of Slope with Colluvial Soil by Fissure Anisotropy under Rainfall Conditions

作　　者：刘登生[1] 何忠明[1] 周科峰[1] 李涛[1] 曾铃[2] 

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410114 [2]长沙理工大学土木与建筑工程学院,湖南长沙410114

出　　处：《矿冶工程》2017年第4期14-18,共5页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(51508042;51678073;51508040);湖南省教育厅科学研究一般项目(16C0053);浙江省交通运输厅科技项目(2014H22);湖南省重点研发计划项目(2016SK2023)

摘　　要：基于饱和-非饱和渗流理论,运用Geo-studio软件中的Seep/w模块研究了裂隙各向异性与不同降雨强度共同作用下边坡的入渗规律。结果表明,当降雨强度小于裂隙渗透系数时,雨水入渗受降雨强度控制;当降雨强度大于裂隙渗透系数时,雨水入渗受裂隙渗透系数控制;在相同的降雨时间与降雨强度条件下,裂隙越短则裂隙内的体积含水率越高,裂隙角度越小对边坡内部体积含水率影响越大;增大降雨强度或增加降雨时间,均会削弱裂隙各向异性对边坡渗流的影响。Based on the saturated-unsaturated seepage theory,infiltration law for slope under the influence of fissure anisotropy with different rainfall conditions was studied with Seep/w module in Geo-studio software.It is found that the rain infiltration is controlled by rainfall intensity that is less than seepage coefficient of slope fissure,but is controlled by the seepage coefficient of fissure when rainfall intensity is higher than the seepage coefficient.With the same rainfall time and same intensity,a shorter fissure has higher volumetric water content and a smaller fissure angle brings greater effect on volumetric water content of the internal slope.An increased intensity or prolonged time of rainfall will reduce the effect of fissure anisotropy on slope seepage.

关 键 词：坡积土 边坡 裂隙 各向异性 降雨入渗 降雨强度 体积含水率 

分 类 号：TU432[建筑科学—岩土工程]