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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 retaining structure, the distribution law of lateral earth pressure is the core of retaining wall design and construction. In order to study the distribution of lateral earth pressure on this retaining wall, the effects of vertical load, anchor prestress and anchor position on the lateral earth pressure on the pull retaining wall and the lateral earth pressure The results show that: (1) Under the action of vertical load, the lateral earth pressure and displacement of the pull retaining wall increase with the increase of vertical load, and the lateral earth pressure (2) After applying prestress, the lateral earth pressure on retaining wall increases significantly and the maximum value appears at the uppermost part. When designing and constructing, it should respond to block (3) The position of anchor rod has little effect on the displacement of retaining wall, but has a greater influence on lateral soil pressure, and the lateral earth pressure on retaining wall is larger when the anchor rod is located at a higher position.