High Sensitive Monitoring of Natural and Engineered Slopes
In this paper we discuss the design and implementation of high sensitive monitoring systems for natural and engineered slopes based on internal fiber optic sensing.We present the monitoring system developed at the Gradenbach Observatory for the monitoring of the Gradenbach mass movement.One key element of the monitoring system is a large fiber optic strain rosette embedded in the slope.We demonstrate that the strain rosette can depict deformations much earlier than geodetic sensor like GPS or total stations and is therefore well suited for an early warning system.In a second application we report about the construction of a reinforced earth structure using geogrids.A distributed fiber optic measurement system was installed to measure the current operating grade of the geogrids within the earth structure.About 2km of Brillouin sensing cables were installed in the project area.We demonstrate that the developed monitoring system is well suited for assessing the current state of health of reinforced earth structures due to the high measurement precision of about 0.01mm/m.
Structural Health Monitoring Fibre Optic Sensors BOFDA SOFO Reinforced Earth Structures Geogrid Landslides
W.Lienhart H.Woschitz E Moser
Institute of Engineering Geodesy and Measurement Systems,Graz University of Technology,Austria
国际会议
南京
英文
8-14
2014-10-12（万方平台首次上网日期，不代表论文的发表时间）