Detection of a Slipping Soil Area in an Open Coal Pit by Embedded Fibre-optic Sensing rods
Movements in geological areas are mostly concentrated on faults or slipping zones.Detection of movements reaching critical values is of crucial importance to avoid losses and harms.The paper presents a new technology of detecting deformations and movements in soil or rock massifs.The core part of the sensing system is a tiny rod with embedded optical sensor fibres.This deformation measurement system was developed and the sensing rod can be installed in a borehole and enables the detection of beginning soil movements.The amount of deformation in soil or rock formations can then be estimated.The sensing rod has an outer diameter of 3 ram to 6 mm and contains several optical fibres.One fibre is used as online measurement system and provides integral strain information along the whole length of the rod.In case of a safety-relevant deformation (warning signal), the second sensing system based on fibre Bragg grating sensors positioned close to the expected shear zone will be activated and records then resulting deformations in detail.
Fibre-optic strain sensor structural health monitoring soil stability monitoring early warning
W.R.Habel D.Hofmarn H.D(O)ring H.Jentsch Andrea Senze G.Kowalle
Department Non-Destructive Testing,BAM Berlin,12205 Berlin,Germany University of Applied Science Mittweida,09648 Mittweida,Germany Department of Geotechnical Engineering,Bauhaus University,99423 Weimar,Germany GESO GmbH Jena,07749 Jena,Germany G.U.B.Ingenieur AG Berlin,10315 Berlin,Germany
国际会议
南京
英文
1-7
2014-10-12（万方平台首次上网日期，不代表论文的发表时间）