Study on monitoring of landslide behavior using portable measurement systems

Abstract

The authors made a system consisting of monitoring such as AE counter and handy laser distance meter. When the behavior of landslide is to be assessed by some monitoring system, the system must be simple and cheap to implement. The AE system used in this study is in focus of AE event rate count only and was applied to two landslide areas. At site A, a tunnel was progressively damaged by the landslide movement. We could recognize the change of the convergence using by laser distance meter with accuracy 1.5 millimeter. A delayed time between rainfalls with AE activity was observed each site. At site B, we consider the relationship of enlargement of landslide from the slide of local section at main scarp. The pipe strain gauge (No. 4) started accumulating after the increase of the AE count of the portable AE counting system.