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.
出处
《公路工程》
北大核心
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)
关键词
黏性土
被动土压力
绕墙顶转动
土拱效应
cohesive soil
passive earth pressure
rotation by top
soil arching effect
作者简介
王国良（1989-），男，江苏徐州人，硕士，从事岩土工程研究。
