Evaluation of surface roughness of rock-like joints using close range photogrammetry method

dc.contributorAalto Universityen
dc.contributor.authorMomeni, Amir Hossein
dc.contributor.authorTorkan, Masoud
dc.contributor.authorAzhari, Amin
dc.contributor.authorUotinen, Lauri
dc.contributor.authorBaghbanan, Alireza
dc.contributor.departmentIsfahan University of Technology
dc.contributor.departmentMineral Based Materials and Mechanics
dc.contributor.departmentDepartment of Civil Engineeringen
dc.description.abstractThe surface roughness of the joints affects their hydraulic and mechanical behavior. There are various methods for assessing the surface roughness of discontinuities. With the development of photography technology and the release of powerful software, a photogrammetric analyzer has been introduced as a non-contact surface evaluation method. In this research, a three-dimensional model of the fracture surface was constructed using the close-range photogrammetric procedure and the joint roughness coefficient (JRC) is derived from the surface profiles. Also, the surface profiles were surveyed using the Profilometers (Barton Comb) and the JRC values were obtained using the Z2 method. Calculations were performed in two sampling steps of 0.42 and 1.27 mm. Ultimately, the results of the two methods were compared. A Sony Cybershot HX1 digital camera was used to capture the images. To process the images and build the 3D model, they were loaded in the "Agisoft metashape" software. A point cloud data was obtained with very high accuracy with a distance of 0.13 mm between points in the 3D model. The results show that the JRC values obtained from the photogrammetry method, for the upper surface of the joint, recorded 8% and 11% difference from the joint surface for sampling intervals of 1.27 and 0.42 mm, respectively. While for the bottom surface of the joint, these differences were 6.1% and 10% for sampling intervals of 1.27 and 0.42 mm, respectively.en
dc.description.versionPeer revieweden
dc.identifier.citationMomeni , A H , Torkan , M , Azhari , A , Uotinen , L & Baghbanan , A 2023 , ' Evaluation of surface roughness of rock-like joints using close range photogrammetry method ' , IOP Conference Series: Earth and Environmental Science , vol. 1124 , no. 1 , 012062 . https://doi.org/10.1088/1755-1315/1124/1/012062en
dc.identifier.otherPURE UUID: b2c62ce2-fab6-4067-b05f-fd704308309c
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/b2c62ce2-fab6-4067-b05f-fd704308309c
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dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/97684187/Momeni_2023_IOP_Conf._Ser._Earth_Environ._Sci._1124_012062.pdf
dc.publisherInstitute of Physics Publishing
dc.relation.ispartofseriesIOP Conference Series: Earth and Environmental Scienceen
dc.relation.ispartofseriesVolume 1124en
dc.subject.keywordclose-range photogrammetry
dc.subject.keyword3D point cloud
dc.subject.keywordimage processing
dc.subject.keywordZ2 parameter
dc.titleEvaluation of surface roughness of rock-like joints using close range photogrammetry methoden
dc.typeConference articlefi