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Correction of Line-Sampling Bias of Rock Discontinuity Orientations Using a Modified Terzaghi Method
Joint Authors
Tang, Huiming
Zhang, Junrong
Huang, Lei
Yan, Changbin
Hu, Shengming
Mohamed Ez Eldin, Mutasim Adam
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-08-29
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
The Terzaghi method is widely used to correct the line-sampling bias of rock discontinuity orientations.
The method includes four procedures, one of which is meshing the stereographic projection diagram into cells.
The method is based on the bias-compensatory factor, 1/sin θ, where θ is the angle between the scanline and the discontinuity defined at each cell center.
This paper presents a modified Terzaghi method that eliminates meshing, thereby reducing the method to three steps that (1) count the frequencies, (2) weigh the frequencies by the bias-compensatory factor, and (3) round the weighed frequencies to the nearest integer.
Due to the elimination of the mesh, the counting object has changed to the frequency at each pole, and θ in the bias-compensatory factor is redefined as the angle between the scanline and the discontinuity at each pole.
The applicability of the redefined bias-compensatory factor is verified through a mathematical logical deduction.
The accuracy of the conventional and the modified Terzaghi methods are compared using a case study in Wenchuan, China, revealing improved accuracy for the latter.
American Psychological Association (APA)
Tang, Huiming& Zhang, Junrong& Huang, Lei& Yan, Changbin& Hu, Shengming& Mohamed Ez Eldin, Mutasim Adam. 2018. Correction of Line-Sampling Bias of Rock Discontinuity Orientations Using a Modified Terzaghi Method. Advances in Civil Engineering،Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1115443
Modern Language Association (MLA)
Tang, Huiming…[et al.]. Correction of Line-Sampling Bias of Rock Discontinuity Orientations Using a Modified Terzaghi Method. Advances in Civil Engineering No. 2018 (2018), pp.1-9.
https://search.emarefa.net/detail/BIM-1115443
American Medical Association (AMA)
Tang, Huiming& Zhang, Junrong& Huang, Lei& Yan, Changbin& Hu, Shengming& Mohamed Ez Eldin, Mutasim Adam. Correction of Line-Sampling Bias of Rock Discontinuity Orientations Using a Modified Terzaghi Method. Advances in Civil Engineering. 2018. Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1115443
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1115443