考虑墙后填土强度各向异性的主动土压力计算方法  

The method for active earth pressure calculation accounting for strength anisotropy of the soils

作　　者：张连卫[1,2] 张建民[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]清华大学岩土工程研究所,北京100084

出　　处：《中国矿业》2011年第10期99-102,112,共5页China Mining Magazine

基　　金：国家自然科学基金资助项目(编号:51009002)

摘　　要：基于水平层分析法,假定不同方向滑裂面上的内摩擦角随该滑裂面与沉积面之间的夹角变化,提出了一种考虑材料各向异性的主动土压力计算方法。通过4个典型算例,讨论了墙后填土强度各向异性程度对主动土压力的影响。计算结果表明,随墙后填土沉积面与水平方向夹角增加,主动土压力逐渐变大,其合力作用点逐渐下降;随填土面倾角增加,各向异性影响逐渐增强。Assuming that the friction angle on different slip plane varies with the angle between the slip plane and bedding plane,an method for active earth pressure estimation accounting for the strength anisotropy of soil was presented based on the method of level-layer analysis.According to four typical examples,the effects of strength anisotropy were discussed.It was shown that the active earth pressure becomes larger and the application point becomes deeper with increasing inclination of the bedding plane of the soils behind the wall.The influence of strength anisotropy becomes stronger with increasing inclination angle of the surface of the backfill.

关 键 词：主动土压力 各向异性 抗剪强度 

分 类 号：TU43[建筑科学—岩土工程]