树根桩和气泡轻质土修复公路路基边坡稳定性研究  

Study on Stability of Subgrade Slope for Highway Repaired by Rooty Piles and Foamed Light-weight Cement

作　　者：李子运[1] 刘东燕[2] 刘博明[1] 

机构地区：[1]重庆科技学院基建规划处,重庆401331 [2]重庆科技学院建筑工程学院,重庆401331

出　　处：《路基工程》2015年第1期1-5,共5页Subgrade Engineering

基　　金：交通部西部交通建设科技项目:重庆地方干线公路突发断道应急抢修技术研究(2009318000001);重庆科技学院教授;博士生导师启动基金(CK2013B27)

摘　　要：针对重庆山区某公路路基塌方段的加固工程,将气泡轻质土和树根桩两种技术有机结合,是一种修复塌方路基的新手段。根据气泡轻质土和树根桩的工作原理,运用FLAC3D有限差分软件对"气泡轻质土和树根桩"修复垮塌路基的效果进行模拟。结果表明:用强度折减法计算出树根桩加固气泡轻质土路基边坡的稳定安全系数满足路基边坡稳定性要求,优化后的树根桩群设计参数可简化路基边坡支护方案;使用树根桩群支护气泡轻质土路基边坡可以快速修复垮塌路基。In relation to the reinforcement engineering in collapse section of subgrade for a highway across mountainous area in Chongqing, the combination of foamed light-weight cement and rooty pile was found to be a new method to repair collapsed subgrade. According to the principle of foamed light-weight cement and rooty pile, the effect of collapsed subgrade repaired by this combination was simulated with finite difference software, FLAC3D. The resuh shows that the safety factor of stability for the subgrade slope of foamed lightweight cement reinforced by rooty piles, which is calculated by strength reduction method, meets the requirement, and the design parameters of optimized rooty piles can simplify the support scheme for subgrade slope, thus the subgrade slope of foamed light-weight cement supported by rooty piles may repair collapsed subgrade rapidly.

关 键 词：公路路基修复 气泡轻质土 树根桩 稳定性 数值模拟 

分 类 号：U416.14[交通运输工程—道路与铁道工程]