基于可靠度理论的加筋土挡墙稳定性分析  

Stability Analysis of Reinforced Retaining Wall Based on Reliability Theory

作　　者：苏树明 

机构地区：[1]辽宁省铁道学会,沈阳110001

出　　处：《路基工程》2016年第5期177-181,共5页Subgrade Engineering

摘　　要：针对加筋土挡墙存在的多种失效模式,分别建立对应的极限状态方程,基于可靠度理论采用一阶可靠度法,结合工程实例对加筋土挡墙稳定性进行分析。同时,对影响加筋土挡墙稳定性的几个关键因素进行了研究。结果表明:采用可靠度理论进行加筋土挡墙稳定性分析,可以很好考虑实际工程中的不确定因素;土工布的抗拉、抗拔性能随着竖向间距的减小而提高,同时,越靠近底层的土工布层的抗拉性能越差;特定设计参数下,存在最合理的挡墙高度。With regard to various failure modes of reinforced retaining wall, the corresponding limit state equations were established respectively; then, by first order reliability method based on relilability theory, the stability of the wall was analyzed and the several key factors affecting the stability studied simultaneously. The result shows that the application of reliability theory in stability analysis of reinforced retaining wall may take uncertain factors into consideration in the practical engineering; geotextile＇s tensile and pull-out performance may improved with the reduction of vertical spacing and, the closer to the bottom layer, the worse tensile performance; on specific design parameters, there exists a most reasonable height of the wall.

关 键 词：填方路基 加筋土挡墙 可靠度分析 失效模式 极限状态方程 

分 类 号：U417.15[交通运输工程—道路与铁道工程]