路堤式与路肩式加筋土挡墙的现场试验与分析

Analysis of in Site Experiment of Reinforced Earth Retaining Walls for the Embankment and Subgrade Shoulders

通过对铁路路堤式及路肩式加筋土挡墙的墙面板水平土压力、墙后土中垂直土压力及加筋材料变形的现场原位试验,得到了两种加筋土挡墙面板水平土压力、墙后土中垂直土压力、拉筋材料变形的变化规律,并对两种挡墙的破裂面进行了探讨。两种加筋土挡墙的面板水平土压力沿墙高均呈曲线型分布;墙后土中实测垂直土压力与理论值的差别随距墙面板距离的增加而线性增大;同一层拉筋变形的平均值随墙高增大而线性增大;列车运行荷载对面板水平土压力及墙后土体的垂直土压力和拉筋的变形影响均较小。

The lateral earth pressure on the facing and the vertical earth pressure of the reinforced earth retaining walls for the embankment and subgrade shoulders and the corresponding tied-reinforcement deformation are measured in side. The change and distribution law of the lateral earth pressure on the facing, the vertical earth pressure, and the tied-reinforcement deformation are obtained. The cracked faces of the reinforced earth retaining walls are discussed. The lateral earth pressure with curve distribution is confirmed. The difference between the theoretical vertical earth pressure and the test data increases linearly with the distance apart from the facing. The average tied-reinforcement deformation increases linearly with earth filling. Train travelling load has little influence on the lateral earth pressure on the facing, the vertical earth pressure, and the tied-reinforcement deformation.