降雨入渗对非饱和土路基稳定性的影响研究  

Study on Effect of Rainfall Infiltration on Stability of Unsaturated Soil Subgrade

作　　者：孙必雄 

机构地区：[1]华南理工大学土木与交通学院,广州510640

出　　处：《路基工程》2015年第1期129-132,共4页Subgrade Engineering

摘　　要：为研究降雨入渗对非饱和土路基稳定性的影响,从非饱和土的渗透特性,降雨入渗的影响因素,降雨对土体强度的影响分析了降雨入渗机理,运用ABAQUS有限元软件进行数值模拟;结果表明:降雨入渗带给路基稳定性的影响是从坡脚向路基内部延伸到一定区域内的,从而导致路基沉降过大,使边坡浅层有可能出现失稳现象,必须采取有针对性的加固措施。可为降雨入渗条件下非饱和土路基及边坡的防护工作提供参考与借鉴。In order to study the effect of rainfall infiltration on stability of unsaturated soil subgrade, this paper, from the unsaturated soil＇s infiltration performance, the factors influencing rainfall infiltration, and the influence of rainfall on the strength of soil mass, analyzed the mechanism of rainfall infihration, and then made numerical simulation with ABAQUS, a finite element software. The results show that rainfall infiltration influences the subgrade stability to the extent from the slope toe to certain range inside the subgrade, thus the subgrade settlement is too much so that instability may arise at the shallow soil layer and the slope is required to be reinforced. It offers reference to the protection of both unsaturated soil subgrade and slope in the condition of rainfall infiltration.

关 键 词：降雨入渗 非饱和土路基 稳定性 影响因素 数值模拟 加固措施 

分 类 号：U416.1[交通运输工程—道路与铁道工程]