摘要
沿海软土地区公路拓宽工程存在的较大难题是新旧路基存在沉降差异,基于广澳高速公路改扩建工程实例,利用有限元软件模拟在软土路基高速公路扩建工程中新旧路基沉降及变形特征,对比不同模量比工况下的沉降变化趋势,并分析路基在一定置换率下不同长度水泥搅拌桩加固前后的沉降规律。结果表明:水泥搅拌桩在高速公路扩建工程中能有效加固软土路基,提升地基承载力进而控制路基沉降及变形。
The major challenge in coastal soft soil area highway widening projects is the differential settlement between existing and new subgrades.Based on the case study of the Guangzhou—Macao Expressway reconstruction and expansion project,finite element software was adopted to simulate the settlement and deformation characteristics of existing and new subgrades in soft soil areas.This study compared settlement trends under different modulus ratio conditions and analyzed settlement patterns before and after treatment with cement-mixing piles of varying lengths at a specific replacement rate.The result shows that,in expressway expansion projects,cement-mixing piles can effectively reinforce soft soil subgrades and enhance foundation-bearing capacity to control subgrade settlement and deformation.
作者
万峰
李飞
代亚飞
张家祥
牛智勇
WAN Feng;LI Fei;DAI Yafei;ZHANG Jiaxiang;NIU Zhiyong(China Railway First Bureau Group(Guangzhou)Construction Engineering Co.,Ltd.,Guangzhou 511400,China;Xi'an Municipal Construction(Group)Co.,Ltd.,Xi'an 710054,China;School of Architectural Engineering,Yan'an University,Yan'an 716000,Shaanxi,China;School of Resources and Civil Engineering,Suzhou University,Suzhou 234000,Anhui,China)
出处
《路基工程》
2025年第4期220-226,共7页
Subgrade Engineering
关键词
扩建公路
新旧路基
沉降变形
复合地基
模量比
路基高度
位移控制
highway expansion
existing and new subgrades
settlement and deformation
composite foundation
modulus ratio
subgrade height
displacement control
