横向变刚度复合地基在高速公路软基处理中的应用  

Application of Lateral Variable Stiffness Compound Foundation in Highway Soft Subgrade Treatment

作　　者：曹建建[1] 涂圣武[1] 曹文涛[1] 李猛[1] 

机构地区：[1]江苏省交通科学研究院股份有限公司,江苏南京210017

出　　处：《现代交通技术》2014年第6期4-6,15,共4页Modern Transportation Technology

摘　　要：依托某高速公路桥头段工程,建立变刚度复合地基有限元模型,在验证模型正确性的基础上,针对变桩距方案进行横向沉降、水平位移、剪应力计算和分析;对变桩长、变模量与变桩距方案进行综合比选,建议采用变桩距方案来实现复合地基调平设计,该方案可有效控制路堤横向差异沉降,同时文章对横向变刚度复合地基在拓宽工程中的应用问题进行了探讨。According to a highway bridge head project, this paper established the finite element model of variable stiffness composite foundation. Based on the correctness verification of the model, calculation and analysis of transverse settlement, horizontal displacement and shearing stress were implemented pointing at changing pile space program. After comprehensive comparison of variable length of pile, modulus of elasticity and changing piles space programs, in order to effectively control the lateral differential settlement of road, changing piles space program was suggested to realize the flat design of composite foundation. In addition, the application problem of lateral variable stiffness compound foundation in widening engineering was also discussed in the paper.

关 键 词：软基处理 横向变刚度 复合地基 差异沉降 变桩距 拓宽工程 

分 类 号：U416.1[交通运输工程—道路与铁道工程]