Roughness characterization of discontinuity sets by profilometer and scanner images
João Paulo Monticelli, Vitor Cantarella, Pedro Pazzoto Cacciari, Marcos Massao Futai · IOS Press eBooks · 2015
Certain tunnels of Vitória-Mina Railway have presented rock fall problems which do not represent major risks, but can impair the railway operation. The TUNELCON Project, partnership between Vale SA and Escola Politécnica da Universidade de São Paulo (EPUSP), seeks to study the geomechanical behavior of these tunnels trough laboratory tests, geological and geotechnical mapping and numerical analyses. Therefore, it is important to collect large amount of data regarding to the rock mass geological and geotechnical characteristics that will be useful in further analysis.In this article the results of the roughness characterization of different discontinuity sets showed high variability for the shear fractures and foliation while relief fractures presented more constant values. The roughness was characterized by profilometer (Barton profilometer) and by 3D terrestrial laser scanner (3DTLS) images and their results were compared. Several Discontinuities from drill cores samples and 3DTLS mapping were used for this investigation.