AE Monitoring for Prediction of Rock Slope Failure by a Remote MISTRAS System
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Above Left: A remote MISTRAS system in operation Above Right: Rock slope monitored by AE Right: NPA's research scientists and application engineer |
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Evaluation of slope stability is very important subject for the land utilization and protection against the natural disasters. ln Japan the problem is heightened because of demand on land use, the terrain and susceptibility to earthquake. AE provides an important method for application as a geotechnique in countries with a high potential for slope failure and for many localized areas of ground instability. AE monitoring for prediction of rock slope failure was performed for twenty months at Nikko in Japan. Since the monitoring site was inconveniently situated, it required enormous labor to collect AE data. Therefore, a remote MISTRAS system was developed to execute download of data and program files remotely by a host computer. PAC Rl.5IU and R6lU low frequency AE sensors were installed on waveguides and embedded in rocks. Rock slope monitoring has been performed by the remote MISTRAS systems in 6 sites all over Japan since 1997.
Copyright 2003, Nippon Physical Acoustics, LTD., All rights reserved
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