降雨入渗对路基稳定性影响因素分析  

Factors analysis of subgrade stability due to rainfall infiltration

作　　者：李亮[1] 刘兴旺[1] 赵炼恒[1] 杨小礼[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《铁道科学与工程学报》2007年第2期19-23,共5页Journal of Railway Science and Engineering

基　　金：湖南省科技厅科技开发项目(04SK2009)

摘　　要：将简化bishop法拓展应用于非饱和土,推导考虑降雨渗流的路基稳定性公式;利用求得的安全系数计算公式,对各影响因素进行理论分析;结合典型工程算例对降雨条件下的路基进行稳定性分析,并讨论各因素变化及其对路基稳定性的影响。分析结果表明,把用于饱和土的简化bishop法拓展应用至非饱和土是可行的,在降雨条件下考虑主要影响因素进行路基稳定性分析是较为有效的方法。The simplified Bishop method was applied and developed dexterously to the unsaturated soil. Based on the project example the subgrade stability formula under the rainfall seepage conditions was derived. Using the safety coefficient formula, various influence factors were considered and analyzed in theoretical view. The analysis results show the feasibihty of the application of simplified Bishop method to the unsaturated soil, and the validity of the stabihty analysis of filling subgrade under rainfall infiltration conditions by considering the dominating factors on the subgrade stability.

关 键 词：道路工程 填土路基 路基稳定性 非饱和土 降雨入渗 

分 类 号：TU441.33[建筑科学—岩土工程]