软土地区高速公路拓宽工程中隔离墙加固机理研究及优化分析

研究高速公路双侧拓宽,当地基中采用深层搅拌桩隔离墙的地基加固方式时,对路堤沉降变形所起的作用运用PLAXIS有限元软件进行数值模拟;然后在不同位置设置隔离墙,研究隔离墙在不同位置对路堤沉降和差异沉降的影响,以及路堤和地基内附加应力的分布情况,得出隔离墙在拓宽工程中的作用机理;然后对隔离墙位置变化和弹性模量参数变化进行对比分析优化。

Reinforcement Mechanism Study and Optimization Analysis of Diaphragm Wall in Expressway Widening Project in Soft Soil Region

This paper studies the bilateral widening of expressway.When the subgrade reinforcement mode of deep mixing pile diaphragm wall is used in the subgrade,the action caused from the settlement deformation of embankment is numerically simulated by PLAXIS finite element software,and then the diaphragm walls are set up at the different positions.The article studies the influence of diaphragm wall on the embankment settlement and the differential settlement at the different positions,and the distribution of additional stress within the embankment and subgrade,then gives the mechanism of diaphragm wall in widening project,and finally compares,analyzes and optimizes the variations of diaphragm wall position and the elastic modulus parameter.