The Development of Landslide Monitoring System with High Sensitivity by AE Methods

一般情况下，不可能直接检测滑动体的声发射，因为在滑动面中，松散的无粘性材料的流动滑动占主导地位。为此，本课题研制了一种新型的滑坡监测装置--声发射监测棒。该监测杆主要由松香和玻璃纤维复合材料模压在钢管内组成，并产生与杆的变形成比例的特殊声发射。实际上，该监测杆通过滑动表面安装在钻孔中。声发射由固定在杆两端的换能器检测，并由专门为滑坡测量设计的监测仪器进行分析。

Generally, it is impossible to detect directly acoustic emissions from the sliding mass because the flow slide of loose cohesionless materials is dominant in the sliding surface. Therefore, a new device for the landslide measurement, the acoustic emission monitoring rod, has been developed in this project. This monitoring rod is composed mainly of the composite materials of rosin and glass fiber moulded in a steel pipe and generates peculiar acoustic emissions in proportion to the deformation of rod. Practically, this monitoring rod is installed in a borehole through the sliding surface. The acoustic emissions are detected by the transducers fixed to both ends of the rod and are analyzed by the monitoring instrument designed specially for the landslide measurement.