Test Study of Electromagnetic CT for Detecting Grouting Effect of Karst Roadbed
详细信息
- 责任者：Zheng Lining (School of Civil Engineering ; Southwest Jiaotong University ; Chengdu 610031 ; China) ; Xie Qiang
- 刊名：Hydrogeology and Engineering Geology
- 出版年：2010
- 卷期：37(6)
- 关键词：桩基检测 ; pile foundation detection ; 电磁法勘探 ; electromagnetic prospecting
- 页码：p.71-75,125
- 图表：3 illus., 2 tables, 15 refs.
- 分类号：1702
- issnNo：ISSN1000-3665
- isbnNo：CN11-2202/P
摘要
Electromagnetic CT was first used for detecting grouting effect of Karst roadbed. According to different types of Karst, 9 parts of the typical karst test segments and 60 test sections were selected. Tests were carried on separately for each section before and after grouting-test.The results showed that electromagnetic CT could test the distributional pattern of Karst cave under the roadbed,bedrock fracture zone, as well as geotechnical interface. It can estimate the flow and diffusion of cement in underground rock and soil after grouting,and can be used to quality testing of railway embankment grouting. Detection method is the comparative test analysis before and after grouting, and the test time is 7 days after the end of grouting.