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

摘要: 结合土洞的分布和形成演化的特点,采用具有分布式特点的同轴电缆时域反射(TDR)技术开展岩溶土洞监测研究。通过室内同轴电缆的抗拉、胶结同轴电缆的抗折等试验,以及在建高速公路上铺设方法的对比,得到以下结论:TDR用于野外岩溶土洞发育区的监测是可行的,但要求同轴电缆的拉断荷载低于200N,水泥砂浆的配比在1∶3～1∶4之间,且梁式胶结同轴电缆铺设方法较好。
- 岩溶土洞 /
- 岩溶塌陷 /
- TDR /
- 监测
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 cost-effective 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 ...
- soil-void /
- sinkhole /
- TDR /
- monitoring