降雨入渗条件下堤防边坡的稳定性分析  

Stability analysis of embankment under rainfall infiltration

作　　者：余兵 YU Bing(Anhui Simashan River Diversion Project Management Office,Maanshan 238251,China)

机构地区：[1]安徽省驷马山引江工程管理处,安徽马鞍山238251

出　　处：《安徽水利水电职业技术学院学报》2020年第3期10-13,共4页Journal of Anhui Technical College of Water Resources and Hydroelectric Power

摘　　要：为了分析降雨入渗对土质堤防边坡稳定性的影响,基于饱和-非饱和渗流理论,采用严格的极限平衡条分法分析了不同降雨条件下土质堤防边坡的稳定性,得到了降雨强度、降雨时间及边坡表面裂隙对堤防边坡安全系数及滑动面位置的影响。结果表明,堤防边坡表面无裂隙时,边坡的安全系数会随着降雨强度及时间的增加而减小,但滑面位置基本不变;边坡表面有裂隙时,降雨对边坡的稳定性及滑面位置均有较大影响。由此提出,汛期堤防查险抢险要特别关注堤顶和坡面防水排水以及表面裂隙情况。Based on saturated-unsaturated seepage theory,the stability of embankment slopes under rainfall infiltration was analyzed using a strict limit equilibrium strip method.The influence of rainfall intensity,rainfall duration and surface cracks on the factor of safety and the position of sliding surface were obtained.The results show that when there is no crack on the surface of the embankment slope,the factor of safety will decrease with the increase of rainfall intensity and time,but the position of the sliding surface is basically unchanged.However;when there are cracks on the surface of the embankment slope,the factor of safety of the embankment slope and the position of the sliding surface will change greatly with the rainfall condition.Therefore,special attention should be paid to the prevention and drainage of rainfall water on the surface of the embankment slope for the embankment inspection and emergency rescue in the flood season.

关 键 词：堤防边坡 安全系数 降雨 裂隙 

分 类 号：TV871.3[水利工程—水利水电工程]