均质粘性填土挡土墙地震主动土压力计算方法研究  

Research on Computing Methods for Active Earth Pressure of Homogeneous Viscous Earth Fill Retaining Wall Under Seismic Condition

作　　者：陈延伟[1] 龚晓星[1] 

机构地区：[1]贵州省交通规划勘察设计研究院股份有限公司,贵阳550081

出　　处：《公路交通技术》2015年第4期9-17,共9页Technology of Highway and Transport

摘　　要：目前,挡土墙地震条件下主动土压力的计算采用最多的就是Mononobe-Okabe理论公式及其相关改进公式,但这些方法几乎都是在相当的假定和简化条件下进行的,致使公式的适用性受到很大的限制。基于MononobeOkabe理论及其它相关研究成果推求更一般条件下的计算公式,综合考虑墙后填土粘聚力c、内摩擦角φ,墙背与填土间的粘着力c'、外摩擦角δ,填土面倾角β(填土面为单一斜度),地震水平加速度系数kh和竖向加速度系数kv,地面超载q0等因素;并基于拟静力法思想,采用水平层分析法(微分薄层法)得到土压力的分布强度、土压力合力大小,以及土压力合力作用点位置高度计算公式。At present Mononobe-Okabe theoretical formula and associated modified formulae are adopted most for calculation of active earth pressure of retaining wall under seismic condition, however, these methods are implemented under considerably assumed and simplified conditions, thus the applicability of formulae is greatly restrained. This paper enquires into computational formulae under more general conditions based on Mononobe - Okabe theory and other relevant achievements of research and comprehensively considers factors such as cohesion c and internal friction angleφof earth fill behind the wall, cohesive force c′and external friction angleδbetween wall back and earth fill, dip angleβof earth fill surface （ single inclination） , seismic horizontal acceleration coefficient kh , vertical acceleration coefficient kv and ground over-load q0 , etc.;and obtains computational formulae for distribution strength, resultant force of earth pressure and position height of acting points of resultant force of earth pressure on the basis of the idea of quasi - static method and by means of the method of level - layer analysis （ thin - layer differential method） .

关 键 词：挡土墙 主动土压力 地震 均质粘性土 微分薄层法 

分 类 号：U417.11[交通运输工程—道路与铁道工程]