真空联合堆载预压软土路基失稳分析  

Instability Analysis of Soft Foundation with Vacuum-Surcharge Preloading

作　　者：徐晓斌 肖广平 王清[3] 何宝石 张敏 XU Xiaobin;XIAO Guangping;WANG Qing;HE Baoshi;ZHANG Min(China Energy Engineering Group Guangdong Electric Power Design Institute Co.,Ltd.,Guangzhou 510663;CCCC-FHDI Engineering Co.,Ltd.,Guangzhou 510600;College of Construction Engineering,Jilin University,Changchun 130026)

机构地区：[1]中国能源建设集团广东省电力设计研究院有限公司,广州510663 [2]中交第四航务工程勘察设计院有限公司,广州510600 [3]吉林大学建设工程学院,长春130026

出　　处：《南方能源建设》2017年第A01期107-110,共4页Southern Energy Construction

基　　金：国家自然科学基金资助项目(41172236)

摘　　要：在对广东某高速公路桥路连接段软土路基采用真空联合堆载预压法进行处治的过程中,该路基发生了整体失稳滑移。为了对路基滑移的原因进行分析,结合对路基滑移后的现场勘察,并根据工程设计、监测等数据资料,对滑体进行了稳定性分析计算,得出了路基处于极限稳定状态时所对应的填土高度为4 m。并对在勘察、设计、监测及施工时需要注意的几个方面的问题进行探讨,为真空联合堆载预压处理软基稳定性控制积累了一定的经验。Vacuum-surcharge preloading was adopted to deal with the soft foundation of a bridge and road connection section of a highway in Guangdong Province,during which an overall instability and slippage of the foundation occurred.In order to analyze the cause of subgrade slippage,based on engineering design,observation and investigation after glide,this paper made an analysis and calculation of the stability of land-slide body,it is concluded that the filling height of the embankment in the limit state is 4 m.The problems which need to be paid attention in the process of investigation,design,monitoring and construction were also discussed,which accumulate certain experience for stability control of applying vacuum-surcharge preloading to deal with soft foundation.

关 键 词：软土路基 真空联合堆载预压 路基滑移 稳定性分析 

分 类 号：U416.1[交通运输工程—道路与铁道工程]