岩土力学Issue(5)：1360-1366,7.
强降雨条件下气压对滑坡延时效应研究
Research on delayed effect of landslides caused by air pressure under heavy rainfall
摘要
Abstract
Under the intense rainfall infiltration, the air in the shallow slope is likely to be confined, and the pore air pressure in air-confining condition increases constantly as the infiltration of rainfall. The physical meaning of the air-closing pressure is illustrated through the force analysis of the wetting front. Compared with the classical Green-Ampt infiltration model, the simplified infiltration model considering the air pressure is used to study the effects of air pressure on the infiltration rate and the moving wetting front. Then the infiltration process and stability analysis of a large area of shallow slope with bedrock beneath is studied through the simplified infiltration model. The results show that the air pressure in the air-confining condition reduces the infiltration rate and the safety factor remarkably, which could also reveal the reason that why some areas had frequent landslides after the rainfall. So considering air pressure for landslide forecasting is greatly significant.关键词
封闭气体压力/降雨入渗/边坡稳定/延时效应Key words
air-closing pressure/rainfall infiltration/slope stability/delayed effect分类
建筑与水利引用本文复制引用
韩同春,马世国,徐日庆..强降雨条件下气压对滑坡延时效应研究[J].岩土力学,2013,(5):1360-1366,7.基金项目
国家自然科学基金项目(No.51178423)。 （No.51178423）
