路基沉陷劈裂注浆加固试验  

Experiment of splitting grouting on subgrade subsidence

作　　者：曾胜[1] 李文[1] 李振存[1] 郭昕[1] 

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410004

出　　处：《长沙理工大学学报（自然科学版）》2013年第3期1-5,12,共6页Journal of Changsha University of Science and Technology:Natural Science

基　　金：交通运输部重大科技专项资助项目(2011318824350)

摘　　要：为了探寻一种针对公路路基沉陷的有效处治措施,提高注浆加固的处治效果,优化注浆施工工艺,在邵怀高速公路典型路基沉陷成因机理分析的基础上,采用劈裂注浆法对路基沉陷进行了处治技术试验研究,并进行了注浆工程的数值模拟和基于FWD检测技术的注浆效果评价.研究结果表明,注浆压力随时间的增长整体呈现波动上升趋势,劈裂注浆加固最优注浆压力为1.2MPa.FWD检测结果表明,本研究提出的竖向花管注浆及水平花管注浆方案的注浆效果良好,能够有效处治路基沉陷病害.In order to explore an effective treatment measure for expressway subgrade sub- sidence, to improve the grouting treatment effect and optimize the grouting construction technique, the treatment technology of subgrade subsidence is studied by the splitting grou- ting method. The numerical simulation of grouting is conducted and the grouting effect o~ FWD technique is evaluated, based on the genetic mechanism analysis of typical subgrade in Shao-Huai Expressway. The results show that the grouting pressure has a rising trend over time, and the optimal grouting pressure of splitting grouting is 1.2 MPa. The FWD test in- dicate that the grouting effect of vertical the flower tube grouting and horizontal flower tube grouting proposed in this thesis is good, which can treat diseases of subgrade subsidence ef- fectively.

关 键 词：路基 沉陷 劈裂注浆 注浆压力 

分 类 号：U418.5[交通运输工程—道路与铁道工程]