加固软土地基路堤分层填筑数值模拟分析  

Numerical simulation analysis of layered filling for reinforcing soft soil subgrade embankment

作　　者：赫林 李俊[2] 李玉君 He Lin;Li Jun;Li Yujun(Wuxi New Lihong Engineering Service Co.,Ltd.,Wuxi Jiangsu 214000,China;Wuxi Traffic Branch of Jiangsu Union Technical Institute,Wuxi Jiangsu 214151,China)

机构地区：[1]无锡新立鸿工程技术服务有限公司,江苏无锡214000 [2]江苏联合职业技术学院无锡交通分院,江苏无锡214151

出　　处：《山西建筑》2025年第3期108-110,118,共4页Shanxi Architecture

基　　金：2022年江苏省无锡交通高等职业技术学校横向科研项目:高速公路路基回填低液限黏土含水量控制的关键技术研究(项目编号:HXKT202203)。

摘　　要：以江苏某高速公路为研究背景,采用水泥土搅拌桩、土工格栅以及0.5 m砂垫进行地基处理,运用有限元软件PLAXIS分析分层填筑施工过程后路基土竖向沉降、水平位移变形规律。研究结果表明:采用水泥土搅拌桩处理后的竖向沉降量降低了45.6%;处理后的水平位移为未处理前的39%,且最大水平位移出现的位置由路堤脚趾处向下移动至水泥土搅拌桩底部位置;分层填筑施工过程中,每填筑一层水平位移和竖向位移均出现一定程度的增长,离路堤中心距离越远,竖向位移影响越小,水平位移呈现先增大后减小的变化趋势。Taking a certain highway in Jiangsu Province as the research background,cement-soil mixing piles,geogrids,and a 0.5 m sand cushion were used for ground treatment.The finite element software PLAXIS was employed to analyze the vertical settlement and horizontal displacement deformation of the subgrade soil after the layered filling construction process.The research results showed that the vertical settlement after using cement-soil mixing piles decreased by 45.6%.The horizontal displacement after treatment was 39%of the pre-treatment value,and the location of the maximum horizontal displacement shifted downward from the toe of the embankment to the bottom of the cement-soil mixing piles.During the layered filling construction process,both horizontal displacement and vertical displacement increased to a certain extent with each layer of filling.The further the distance from the center of the embankment,the smaller the influence on the vertical displacement,and the horizontal displacement showed a trend of initially increasing and then decreasing.

关 键 词：数值模拟 水泥土搅拌桩 分层填筑 位移 路堤 

分 类 号：TU997[建筑科学—市政工程] U416.12[交通运输工程—道路与铁道工程]