压力分散型挡土墙土压力分布规律分析

Analysis on Earth Pressure Distribution of Dispersed Pressure Retaining Wall

为了研究压力分散型挡土墙的受力特性,结合实体工程,设计了室内模型试验。在不同挡墙高度处埋设了土压力盒监测仪器检测挡土墙受力特性。采用FLAC 3D软件对室内模型进行模拟验证。模型试验及数值模拟结果表明,侧向土压力增量曲线呈非线性曲线分布。挡土墙在锚杆1/2高度处存在位移和土压力的转点。墙体在转点以上土压力介于静止土压力和被动土压力之间,在转点以下介于主动土压力和静止土压力之间。锚杆的设置高度是影响土压力分布的重要因素。

Aiming at studying mechanical characteristic of dispersed pressure retaining wall,model test was designed based on entity engineering.Soil pressure cells was buried in different location,which was used to analyze the distribution of soil pressure.FLAC 3 D software was used to simulate the model test.The results show that the distribution of soil lateral pressure was non-linear.There was a turning point in 1/2 of anchor height in displacement and earth pressure.The soil pressure above turning point was between earth pressure at rest and passive earth pressure.The soil pressure under turning point was between earth pressure at rest and active earth pressure.The setting height of anchor has important influence to soil pressure.