反压护道+预应力管桩复合地基在软土地基中的应用  

Application of back pressure berm and pipe pile composite foundation in soft soil foundation

作　　者：周杰 刘博 ZHOU Jie;LIU Bo(Hunan Guanxin Expressway Construction and Development Co.,Ltd.,Hunan Changsha 410000 China)

机构地区：[1]湖南省官新高速公路建设开发有限公司,湖南长沙410000

出　　处：《山东交通科技》2023年第3期52-55,63,共5页

摘　　要：以湖南某高速公路某段下伏淤泥质粉质粘土层路基为依托,针对软基病害段提出反压护坡+预应力管桩的二次联合加固方案,通过数值模拟,揭示反压护道宽度和高度对路基安全系数及潜在破裂面的影响规律,比选得出合理的加固参数。Based on the silty silty clay subgrade underlying a section of an expressway in Hunan province,this paper proposes a secondary joint reinforcement scheme of reverse pressure slope protection+prestressed pipe pile for the damaged section of soft foundation.Through numerical simulation,the influence law of the width and height of the reverse pressure protection on the safety factor and potential fracture surface of the subgrade is revealed,and reasonable reinforcement parameters are obtained by comparison.

关 键 词：软土地基 反压护道 预应力管桩 

分 类 号：U414[交通运输工程—道路与铁道工程]