考虑土拱效应的挡土墙被动土压力研究  

Research on Passive Earth Pressure of Retaining Wall Considering Soil Arching

作　　者：王国良[1] 刘涛[2] 钱明 孙薇薇[4] 刘德稳[4] 

机构地区：[1]盐城工学院土木工程学院,江苏盐城224000 [2]成都理工大学环境与土木工程学院,四川成都610000 [3]中国石油天然气华东勘察设计研究院岩土工程处,山东青岛266071 [4]西南林业大学土木工程学院,云南昆明650000

出　　处：《公路工程》2015年第2期159-162,共4页Highway Engineering

基　　金：中国石油工程建设公司科学研究与技术开发项目(CPECC2013KJ02)

摘　　要：针对多数挡土墙被动土压力研究未考虑土拱效应和仅考虑砂土影响的现状,对考虑土拱效应的黏性土挡土墙被动土压力进行了研究,给出了黏性土下的侧向被动土压力系数;用应力状态法求解出了绕墙顶转动下的挡土墙被动土压力竖向平均应力及土压力合力及作用点,并结合算例研究了不同土拱效应对被动土压力的影响及不同计算方法对结果的影响。结果表明:由于土拱效应的影响,挡土墙被动土压力呈上大下小非线性分布;随着参数δ/φ的增大,土拱效应增大,挡土墙作用点高度逐步下降。For most of the passive earth pressure of retaining the research did not consider the soil arch effect and only considering the effects of soil present situation,in this paper,considering the soil arch effect of clayey soil retaining wall passive earth pressure are studied,clayey soil is given under the lateral coefficient of passive earth pressure and the friction coefficient between the layers to solve the formula;With stress state method for solving the wall around the turn of the passive earth pressure of retaining average stress and the vertical earth pressure resultant force,combined with the case study of the soil arch effect different effect on the passive earth pressure. Results show that because of the influence of the soil arch effect,RT mode passive earth pressure of retaining structure is concave curve; With the increase of the soil cohesion of the passive earth pressure will gradually increase; With the increase of parameters,nonlinear distribution of passive earth pressure.

关 键 词：黏性土 被动土压力 绕墙顶转动 土拱效应 

分 类 号：U417.11[交通运输工程—道路与铁道工程]