湿陷性黄土段路基沉降特性及其影响因素分析
Analysis of Subgrade Settlement Characteristics and its Influencing Factors in Collapsible Loess Section
胡彦超1
作者信息
- 1. 河南宏盛工程监理有限公司,河南周口 466000
- 折叠
摘要
以某道路项目为例,通过室内土工试验确定了湿陷性黄土的物理力学指标参数,利用PLAXIS软件建立路基最高填方断面的有限元模型,并从填方高度、填方含水率、地形、填方斜坡坡度、台阶开挖等方面分析其对路基沉降的影响.结果显示,不同因素对路基的影响各不相同,随着填方高度、含水率及斜坡坡度的增大路基沉降量不断增大,填方高度为6 m、含水率为17％、斜坡坡度为1∶1.5时路基沉降量最小,变化幅度也最小;沟谷地形段路基的沉降量大于平坦地形段路基;台阶开挖4 m时,路基沉降量小于原边坡不处理、台阶开挖2 m工况下的路基沉降量.
Abstract
Taking a road project as an example,the study determined the physical and mechanical index parameters of collapsibility loess through indoor soil tests.On this basis,PLAXIS software was used to establish a finite element model of the highest embankment fill section,and analyzed the influence on the settlement of the embankment from five aspects:fill height,fill moisture content,topography,fill slope slope and step excavation.The results showed that:the influence of different factors on the subgrade is different.For example,with the increase of fill height,water content and slope,the subgrade settlement also increases.When the fill height is 6 m,the water content is 17％and the slope slope is 1∶1.5.The subgrade settlement is the smallest,and the change range is also the smallest.The settlement of the subgrade in gully terrain section is greater than that in flat terrain section.The settlement of the roadbed under the condition of 4 m step excavation is less than that under the condition of no treatment of the original slope and 2 m step excavation.
关键词
湿陷性黄土/高填方/有限元模型Key words
Collapsible loess/High fill/Finite element model引用本文复制引用
出版年
2024
NETL
NSTL
万方数据