基于有限元法的碎石桩处治湿陷性黄土道路病害效果研究  

Research on the Effect of Gravel Pile Treating Collapsible Loess Road Diseases Based on Finite Element Method

作　　者：胡景春 张谢东[1] 李帅 王浩科 HU Jingchun;ZHANG Xiedong;LI Shuai;WANG Haoke(School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China;Yanhuang High-grade Highway Construction and Development Co.,Ltd.,Ordos 017000,China)

机构地区：[1]武汉理工大学交通与物流工程学院,武汉430063 [2]鄂尔多斯市沿黄高等级公路建设开发有限公司,鄂尔多斯017000

出　　处：《交通科技》2023年第3期11-14,共4页Transportation Science & Technology

基　　金：内蒙古自治区交通科技项目(HXZB-2021-022)资助。

摘　　要：湿陷性黄土是一种在天然湿度下具有较高强度和较低压缩性的特殊土,遇水极易产生湿陷变形,对道路工程有害。结合内蒙古某高速公路湿陷性黄土路基病害处治工程,采用ABAQUS有限元软件建立碎石桩处治前后的路基断面模型并进行沉降数值模拟,结合现场沉降观测结果,分析碎石桩对湿陷性黄土路基病害的处治效果。结果表明,经碎石桩处治后的路基沉降小于碎石桩处治前的路基沉降,碎石桩可有效减少湿陷性黄土路基不均匀沉降。数值模拟结果与实测结果较为接近且变化规律基本一致,验证了数值模拟的可靠性。Collapsible loess is a kind of special soil with high strength and low compressibility under natural humidity.It is easy to produce collapsible deformation when encountering water,which is of great harm to road engineering.Combined with the treatment project of collapsible loess subgrade of an expressway in Inner Mongolia,the subgrade section model before and after the treatment of crushed stone pile was established by using ABAQUS finite element software,and the settlement numerical simulation was carried out.Combined with the observation results of field settlement,the treatment effect of crushed stone pile on the collapsible loess subgrade disease was analyzed.The results show that the subgrade settlement after gravel pile treatment is less than that before gravel pile treatment,and gravel pile can effectively reduce the uneven settlement of collapsible loess subgrade.The numerical simulation results are close to the measured results and the variation rules are basically consistent,which verifies the reliability of the numerical simulation.

关 键 词：湿陷性黄土 碎石桩 ABAQUS 路基病害处治 

分 类 号：U418[交通运输工程—道路与铁道工程]