柔性挡土结构土压力与位移关系分析

Relations analysis on earth pressure and displacement of flexible retaining structure

为了进一步研究土压力随柔性挡土结构位移的变化规律和柔性挡土结构的土压力与位移之间的关系,根据作用在柔性挡土结构的土压力和位移的工程实测数据,通过对土压力随位移变化规律的分析,发现墙体位移类型从绕墙底转动逐渐变为向墙中部凸起的抛物线形的整个过程当中,土压力沿深度始终呈线性分布。另外,根据各工况下柔性挡土结构的实测位移,采用正弦模型和双曲线模型分别计算出土压力值,发现二者计算结果十分相近,并且与实测土压力较为接近。因此,正弦模型和双曲线模型能较好地对本工程的土压力与位移关系进行拟合。

In order to further study on earth pressure variation with flexible retaining structure displacement and the relationship between earth pressure and displacement on the flexible retaining structure, according to the measured data of the earth pressure and the displacement on the flexible retaining structure, through the analysis of variation of earth pressure with displacement of the structure, we found that the wall displacement type has gradually changed from around the structure at the end of the rotation to a parabola shaped structure raised in the middle, the earth pressure along the depth is linear distribution in the whole process. In addition, according to the measured displacements of flexible retaining structure under various working conditions, we respectively calculated the earth pressure value by sine model and hyperbolic model, found that the two results are very similar, and are close to the measured earth pressure. Therefore, the two models can be used to fit the relationship between pressure and displacement of the project