Using several monitoring techniques to measure the rock mass deformation in the Montserrat Massif

International Symposium on Geohazards and Geomechanics 2015

地球科学;生态环境科学

Janeras, M.^1 ; Jara, J.A.^1 ; López, F.^1 ; Marturià, J.^1 ; Royán, M.J.^2 ; Vilaplana, J.M.^2 ; Aguasca, A.^3 ; Fàbregas, X.^3 ; Cabranes, F.^4 ; Gili, J.A.^4

Institut Cartogràfic i Geològic de Catalunya (ICGC), Parc de Montjuïc, Barcelona

08038, Spain^1

Department of Geodynamics and Geophysics, Faculty of Geology, University of Barcelona (UB), Barcelona

08028, Spain^2

RSLAB - Research Group on Remote Sensing, Signal Theory and Communications Department, Technical University of Catalonia (UPC), Barcelona

08034, Spain^3

Department of Geotechnical Engineering and Geosciences, Technical University of Catalonia (UPC), Barcelona

08034, Spain^4

关键词: Building areas;    Displacement monitoring;    Ground-based synthetic aperture radars;    Monitoring techniques;    Risk mitigation;    Rock mass deformation;    Space and time;    Terrestrial laser scanners;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/26/1/012030/pdf
DOI  :  10.1088/1755-1315/26/1/012030

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Montserrat Mountain is located near Barcelona in Catalonia, at the north-east corner of Spain, and its massif is formed by conglomerate interleaved by siltstone/sandstone with steep slopes very prone to rock falls. The increasing visitor's number in the monastery area, reaching 2.4 million per year, has pointed out the risk derived from rock falls for this building area and also for the terrestrial accesses, both roads and rack railway. A risk mitigation plan is currently been applied for 2014-2016 that contains monitoring testing and implementation as a key point. The preliminary results of the pilot tests carried out during 2014 are presented, also profiting from previous sparse experiences and data, and combining 4 monitoring techniques under different conditions of continuity in space and time domains, which are: displacement monitoring with Ground-based Synthetic Aperture Radar and characterization at slope scale, with an extremely non uniform atmospheric phase screen because of the stepped topography and atmosphere stratification; Terrestrial Laser Scanner surveys quantifying frequency for unnoticed activity of small rock falls, and monitoring rock block displacements over 1cm; monitoring of rock joints with a wireless net of sensors; and tentative surveying for singular rocky needles with Total Station.