地震条件下挡土墙被动土压力及其分布的微分薄层计算方法  

Differential Method of Thin Layer for Passive Earth Pressure and Its Distribution of Retaining Wall under Seismic Condition

作　　者：徐利敏[1] 孙若飞[1] 孙勇[1] 

机构地区：[1]贵州大学喀斯特环境与地质灾害防治教育部重点实验室,贵州贵阳550003

出　　处：《水利与建筑工程学报》2014年第6期32-37,共6页Journal of Water Resources and Architectural Engineering

基　　金：贵州省科学技术基金资助项目(黔科合J字[2010]2245);贵州省优秀教育人才省长基金资助项目(黔省专合字2011-35);国家自然科学基金资助项目(51168009)

摘　　要：基于微分薄层法思想推导出被动土压力沿挡土墙墙高的非线性分布公式,研究了地震条件下分层土挡土墙被动土压力的计算方法。文中以墙后均匀填土挡土墙为例计算被动土压力,经与朗肯、库伦土压力理论公式的计算结果比较,有很好的吻合性。文章对被动土压力的分析和计算方法,突破了以往所研究的解析解均是针对单一、均质、各向同性填土的限制,可适用于多层不同性质填土的挡土墙被动土压力的计算。而文章计算得到的被动土压力合力的作用点位置低于朗肯、库伦被动土压力合力作用点位置,与以往多位学者相关研究的结论一致,也应该引起注意。Based on the thin layer method ,the non-linear distribution formula of retaining wall height under passive earth pressure was deduced ,and the calculation method for passive earth pressure under seismic condition was discussed .By comparing the test results with those of the Rankine theory and Coulomb theory ,it was found that the results were in con-sistency .Therefore ,the calculation formula and method are suitable for calculating passive earth pressure of retaining wall of different multilayer nature filling .This break the limit of the previous works ,of which the analytical solutions are only for single homogeneous isotropic filling .Here ,the conclusion is consitstent with that of other researchers’ work on this field ,namely the point position of passive earth pressure determined by this method is lower than that of Rankine theory and Coulomb theory ,which should also be noticed .

关 键 词：地震 挡土墙 被动土压力 分层填土 

分 类 号：TU432[建筑科学—岩土工程]