电磁波CT岩溶路基注浆质量检测试验研究

Test study of electromagnetic CT for detecting grouting effect of Karst roadbed

首次应用电磁波CT对岩溶路基注浆加固进行质量检测,现场根据不同岩溶发育类型选取9段典型试验区段,60个试验断面。对每个试验断面分别进行注浆前、注浆后检测现场试验。试验结果表明,电磁波CT能够探测出岩溶路基地下溶洞、基岩破碎带以及岩土分界面的分布形态,能够判释注浆后水泥浆液在地下岩土体中的流动及扩散,可以用于铁路岩溶路基注浆质量检测。检测方法为注浆前后对比测试分析,注浆后检测时间为注浆完7天以后。

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.