水文地质工程地质2011，Vol.38Issue(1)：118-122,5.
岩溶(土洞)塌陷TDR监测试验研究
A study of the monitoring deformation of sinkhole collapse using TDR time domain reflectometry
摘要
Abstract
Controlled by karst development and groundwater fluctuation, soil cave usually forms indefinitely and develop upward progressively until a sinkhole happens.It is important to find an efficient way to monitor the soil cave formation in good season for decision maker to take treatments.TDR has been used as a costeffective method to monitor soil voids and sinkholes.The principle of soil void monitored with TDR is introduced in this paper.Cable tester lines need to be plane installed.Coaxial cables are subsequently grouted with cement bonded sand to protect the cable and to ensure that the cables deform with the surrounding sediments.When subsurface void propagates to the coaxial cable, the cement-sands surrounding the cable will be broken and the deformation can be located by detecting the location of a cable.Types of the coaxial cable,intension of the cement bounded sand and the coaxial cable installation will influence the validity of soil-void monitoring and forecasting.Therefore, a series of geotechnical and material tests in a lab and in the field are arranged.The results show that the coaxial cable tensile strength should be lower than 200N and the cementsands ratio is in the range of 1∶ 3 to 1∶ 4 for karst collapse monitoring and forecasting.关键词
岩溶土洞/岩溶塌陷/TDR/监测分类
地质学引用本文复制引用
蒋小珍,雷明堂,戴建玲,管振德,高明,王永辉..岩溶(土洞)塌陷TDR监测试验研究[J].水文地质工程地质,2011,38(1):118-122,5.基金项目
国家自然科学基金资助项目(40972231) （40972231）
国土资源部百人计划项目"线性工程岩溶土洞塌陷TDR监测预警研究" （）
广西交通厅科技项目"岩溶发育区高等级公路路基地质塌陷监测方法研究"课题 （）
