土工格栅加筋土挡墙土压力测试与有限元分析

为研究土工格栅加筋土挡墙内的土压力分布规律, 结合某试验段挡墙土压力现场测试, 采用有限元法进行了计算分析。分析了土工格栅参数及填料重度对挡墙内土压力分布规律的影响, 研究结果表明:①挡墙面板处的水平土压力, 数值解均小于规范设计值, 随加筋间距减小、刚度和长度的增大而减小;填料重度则对其无明显影响。②基底处垂直土压力在面板附近有明显波动, 部分数值超过规范设计值, 其它位置的计算值与设计值基本符合;土工格栅加筋性能则对其无明显影响。

Testing and FEM Analysis on Earth Pressure in Geogrid-reinforced Retaining Wall

To research the distribution regularity of earth pressure in geogrid-reinforced retaining wall, in-situ tests and finite element analysis were carried out on a retaining wall. The influences of geogrid’s parameters and filling material’s weight density on earth pressure distribution was analyzed. Results showed that: (1) All numerical solutions of lateral earth pressure behind retaining wall’s panel were smaller than the design value according to industry standard, and the value of lateral earth pressure decreased with the decrease of geogrid’s spacing and the increase of geogrid’s length and stiffness. Weight density of filling material had no apparent effect on lateral earth pressure. (2) Vertical earth pressure beneath the retaining wall’s basement fluctuated apparently near the wall’s panel. Except for some values which exceeded the design value, the vertical earth pressure at other places consisted well with the design value. The performance of geogrid had no apparent effect on the vertical earth pressure.