对拉式挡土墙侧向土压力分布规律试验研究  

Test and Study of Lateral Earth Pressure Distribution Law for Mutual Anchoring Retaining Wall

作　　者：张宏博[1,2] 孟庆宇[1,2] 岳红亚 厉超[1,2] 

机构地区：[1]山东大学土建与水利学院,济南市250061 [2]山东省路基安全工程技术研究中心,济南市250061

出　　处：《公路》2016年第2期6-11,共6页Highway

基　　金：国家自然科学基金;项目编号51208284;山东省科技发展计划;项目编号2013GSF11603

摘　　要：对拉式挡土墙作为一种新型支护结构,其侧向土压力的分布规律是挡土墙设计及施工的核心内容。为研究该类型挡土墙侧向土压力分布规律,通过室内模型试验的方法,研究了竖向荷载、锚杆预应力、锚杆位置等因素对对拉式挡土墙的侧向土压力及侧向位移分布规律的影响,得出如下结论:(1)在竖向荷载作用下,对拉式挡土墙侧向土压力与位移随着竖向荷载的增加而增大,侧向土压力沿高度方向呈类抛物线形分布且最大值出现在锚杆位置附近;(2)施加预应力后,挡土墙侧向土压力显著增大且最大值出现在最上部,设计及施工时应对挡墙上部进行加固;(3)锚杆位置对挡土墙位移影响较小,但对侧向土压力影响较大,锚杆位于较高位置时挡土墙侧向土压力较大。As a new type of supporting structure, the lateral earth pressure distribution of mutual anchoring retaining wall is the core content of design and construction of retaining wall. To analyze the lateral earth pressure distribution of this type of retaining wall, the influence of the vertical load, the anchor prestressing and position on the lateral earth pressure and the lateral displacement distribution of the mutual anchoring retaining wall are studied by means of indoor model test in the paper, and conclusions are drawn as follows. （1） under the vertical load, the lateral earth pressure and the lateral displacement of the mutual anchoring retaining wall increase with the vertical load, the lateral earth pressure along the height direction is in the distribution parabolic and the maximum value appeared near the anchor position; （2） after imposing prestressing, the lateral earth pressure of retaining wall increases significantly and the maximum value appear in the upper position, reinforcement should be made for the upper location; and （3） the impact of anchor position on the lateral displacement of retaining wall is less, but it has a greater influence on the lateral earth pressure; when the anchor position in higher, the lateral earth pressure of retaining wall is bigger.

关 键 词：对拉式挡土墙 侧向土压力 模型试验 位移 

分 类 号：U417.11[交通运输工程—道路与铁道工程]