岩土层含水量分层监测系统的研究及应用

Research on Multi-layer Monitoring System of Water Content in Rock and Soil Layers and Its Application

摘要:

开发为地质灾害预测预报所需用的岩土层含水量和渗透力测试仪，并和气候雨量、地质灾害成灾规律联系起来，是我国地质灾害监测预报发展的趋势。岩土层含水量分层监测系统是采用TDR（Time Domain Refiectometry）技术原理、方法研制的仪器，通过波导棒探针发射的电磁波射入岩土层，测量电磁波脉冲从波导棒的起点传播到接收末端的反射电压值，此反射电压值与岩土体本身含水量介电常数有函数关系，经过计算转换为测点岩土体积含水量，实时测量和采集地质灾害岩土层含水量和渗透力参数。介绍了该监测系统的基本原理、主要技术参数、监测工艺技术方法以及现场应用情况。

Abstract:

An early warning monitoring method for landslides based on quasi-distributed fiber optic stress sensing is presented in this paper. The principle of quasi-distributed fiber optic stress sensing and the monitoring method for landslides with the internal stress of landslides are described. According to the characteristics of the soil mass and the changes of stress which was detected by the system, through some applications of specific mathematical models, the movement can be predicted. With stress measuring range 0~15MPa, spatial resolution 2m, measuring distance 1km, the quasi-distributed fiber optic stress sensor and the warning monitoring system are designed. This landslide monitoring method has outstanding performance characteristics; for example, high-sensitivity, high spatial resolution, quasi-distributed measuring, easy networking to monitor landslides in the area and very good adaptability in project.