考虑土拱效应的铁路刚性挡墙主动土压力计算方法  

Calculation Method of Active Earth Pressure of Railway Rigid Retaining Wall Considering Soil Arch Effect

作　　者：路维[1] 孙文君[1] 王学民[1] 杨鹏志[1] 崔立功[1] 

机构地区：[1]河北工程技术高等专科学校,河北沧州061001

出　　处：《铁道建筑》2016年第4期98-101,106,共5页Railway Engineering

基　　金：河北省高等学校科学技术研究指导项目(Z2015191)

摘　　要：对考虑土拱效应的水平微元滑裂体水平向及竖向静力平衡方程进行了分析,获得了平移模式下的刚性挡土墙侧向主动土压力、主动土压力合力及其作用点的计算公式,并与模型试验数据进行了比较。结果表明:本文得到的平移模式下刚性挡土墙墙后主动土压力分布与模型试验结果吻合较好,最大值比实测值略大;墙背主动土压力沿墙高呈非线性分布,墙背主动土压力合力作用点高度大于墙高的1/3。This paper analyses the horizontal and vertical static equilibrium equations of horizontal differential sliding mass with soil arch. New formulas of rigid retaining wall lateral active earth pressure,active earth pressure resultant force and its action position were derived under translation mode. The Comparisons between the theoretical and measured values shown that the lateral active earth pressure distribution of rigid retaining wall under translation mode from the proposed formulas are agree well with results from the model test,and the maximum value from calculation is slightly larger than measured value. The distribution of the lateral active earth pressure is nonlinear along the wall height,and the action position of active earth pressure is larger than one third of the wall height.

关 键 词：土拱效应 刚性挡土墙 主动土压力分布 应力莫尔圆 

分 类 号：U213.152.2[交通运输工程—道路与铁道工程]