降雨对北京奥林匹克森林公园主山稳定性的影响  

RAINFALL INFLUENCE ON STABILITY OF BEIJING OLYMPIC PARK HILL

作　　者：张邓霖[1] 姚仰平[1] 

机构地区：[1]北京航空航天大学土木工程系,北京100083

出　　处：《工业建筑》2008年第2期53-58,共6页Industrial Construction

基　　金：国家科技支撑计划资助项目(2006BAK12B12)

摘　　要：基于非饱和土土力学中的饱和-非饱和渗流数学模型,通过模拟奥林匹克森林公园主山边坡因雨水入渗引起的瞬态渗流场,对土体中含水量、基质吸力的变化规律进行分析。在此基础上根据扩展Mohr-Coulomb破坏准则,采用极限平衡分析法对该边坡进行稳定性分析,进而得出边坡在降雨过程中不同时刻的安全系数。具体分析了不同降雨类型对非饱和土土坡渗流场分布、发展及其对土坡稳定性的影响。随后用概率方法对土性参数变异时山体稳定的可靠性给予分析。On the basis of saturated-unsaturated seepage model, by simulating transient seepage fields due to rainfall infiltration for Beijing Olympic Park Hill, the matric suction in the slope is analyzed. By the extended Mohr-Coulomb failure criterion, the slope stability is analyzed using limit equilibrium method. Therefore the factors of safety at different time during the rainfall are calculated. In addition, effects of different rainfall model on seepage fields distribution of unsaturated soil slope and the slope stability are analyzed in this paper. Then, the reliability of slope stability as the soil parameters varying is presented by means of probability method.

关 键 词：降雨入渗 非饱和渗流 边坡稳定 可靠性分析 

分 类 号：TU43[建筑科学—岩土工程]