高速公路路基加宽泥炭质土地基加固优化研究  

An optimal study on the peaty soil foundation of highway subgrade widening

作　　者：沈立森 SHEN Li-sen(Department of Civil Engineering and Architecture,Shijiazhuang University of Applied Technology,Shijiazhuang,Hebei 050081,China)

机构地区：[1]石家庄职业技术学院建筑工程系,河北石家庄050081

出　　处：《石家庄职业技术学院学报》2022年第4期1-6,共6页Journal of Shijiazhuang College of Applied Technology

摘　　要：泥炭质土是一种特殊软弱土.解决软弱土地基的新老路基差异沉降是高速公路加宽工程的关键.分析了引起高速公路路基加宽前后产生不协调变形的主要原因(不均匀沉降)和控制措施.以某高速公路加宽工程为例,选取典型断面,利用有限元软件ADINA建立模型,对地基桩基处理加固前后的变形特征进行分析,结果表明,当桩体模量为10 GPa、桩径0.4 m、桩间距2.0 m、桩长8.0 m时,地基加固效果最佳.Peaty soil is a special soft soil as the differential settlement of new and old roadbed foundation for highway widening.This paper analyzes the uneven settlement and its measures to control disharmonious deformation.A typical section is selected as a model established by using finite element software ADINA to analyze the deformation characteristics of pile foundation before and after reinforcement.Results show that when the pile modulus is 10 GPa,with diameter 0.4 m,spacing 2.0 m and length 8.0 m,the reinforcement effect is the best.

关 键 词：高速公路 路基加宽 泥炭质土 地基加固 路拱横坡度 

分 类 号：U416.1[交通运输工程—道路与铁道工程]