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Sensors 2013, 13(3), 3739-3752; doi:10.3390/s130303739
Article

Design and Application of a Field Sensing System for Ground Anchors in Slopes

1
,
1
,
2
 and
1,*
1 Department of Architectural Engineering, Yonsei University, Seoul 120-749, Korea 2 Dasumtek Incorporated, Seoul 222-22, Korea
* Author to whom correspondence should be addressed.
Received: 16 February 2013 / Revised: 13 March 2013 / Accepted: 14 March 2013 / Published: 18 March 2013
(This article belongs to the Section Sensor Networks)
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Abstract

In a ground anchor system, cables or tendons connected to a bearing plate are used for stabilization of slopes. Then, the stability of a slope is dependent on maintaining the tension levels in the cables. So far, no research on a strain-based field sensing system for ground anchors has been reported. Therefore, in this study, a practical monitoring system for long-term sensing of tension levels in tendons for anchor-reinforced slopes is proposed. The system for anchor-reinforced slopes is composed of: (1) load cells based on vibrating wire strain gauges (VWSGs), (2) wireless sensor nodes which receive and process the signals from load cells and then transmit the result to a master node through local area communication, (3) master nodes which transmit the data sent from sensor nodes to the server through mobile communication, and (4) a server located at the base station. The system was applied to field sensing of ground anchors in the 62 m-long and 26 m-high slope at the side of the highway. Based on the long-term monitoring, the safety of the anchor-reinforced slope can be secured by the timely applications of re-tensioning processes in tendons.
Keywords: strain sensing; wireless sensor node; residual tensile force; ground anchor strain sensing; wireless sensor node; residual tensile force; ground anchor
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Choi, S.W.; Lee, J.; Kim, J.M.; Park, H.S. Design and Application of a Field Sensing System for Ground Anchors in Slopes. Sensors 2013, 13, 3739-3752.

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