软土高路堤新型加固结构拉结筋带变形的理论研究

针对现有公路软土路堤修建方法存在工期长、费用高、工后沉降难控制等问题,提出一种公路软土路堤新型加固结构体系。它由柔性结构(拉结筋带)和刚性结构(连续桩板墙结构)相结合而成的力学闭合结构体系。在不考虑土摩阻的情况下,结合此体系中柔性拉结筋带的微段单元在土体中的受力平衡条件,推导出柔性结构在土体中的变形方程,并分析了不同的路堤宽度、填土高度及地基系数对其变形所产生的影响。结果表明:对柔性结构变形最主要的影响因素是地基系数和填土高度。

Theoretical Study on Binding Bar Strip Deformation in New Reinforcing Structure for Soft Soil High Embankment

In view of the current methods for soft highway embankment construction caught in long period, high cost, post-construction settlement difficult to control and other issues, this paper advised a new reinforcing structural system for soft embankment. It was a closed mechanical structural system, consisting of flexible structure (binding bar strip) and rigid structure (continuous pile-plank wall structure). Ignoring the friction of soil, the micro-cell of the binding bar strip was in the state of force balance in soil, by which the equation on deformation of this flexible structure in soil was derived; and at the same time, how the embankment width, the filling height and the foundation coefficient affect the deformation were analyzed herein. The results show that the major factors influencing deformation of the flexible structure are foundation coefficient and filling height.