刚柔复合挡土结构模型实验

Experiment of rigid-flex composite retaining structure

针对传统刚性挡土结构承受土压力较大的现状,提出刚柔复合挡土结构的概念.利用柔性材料泡沫的易压缩性,增加土与挡土结构接触面的相对位移量,使作用于挡土结构的土压力趋向主动土压力,从而减小挡土结构上的土压力.通过室内模型实验,得到不同厚度泡沫挡墙后的土压力及土体位移,以及泡沫厚度对墙后土压力、土体接触面位移的影响.结果表明:泡沫厚度对土压力与土-结构接触面位移有影响;刚柔复合挡土结构能够明显降低作用于墙体的土压力.

A rigid-flex composite retaining structure was constructed to reduce the earth pressure against retaining structure by increasing the displacement of soil-structure interface displacement, according to the large earth pressure against traditional rigid retaining structure. The test model of the rigid-flex composite retaining structure and the test process was presented. Model tests were performed for the displacement of the soil and the earth pressure acting against rigid-flex composite retaining structure on various thickness of flexible material （foam）. The foam thickness factor affecting the earth stress and the soilstructure interface displacement was analyzed. The model test showed that the rigid-flex composite retaining structure was effective for reducing earth pressure.