Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Correction of Line-Sampling Bias of Rock Discontinuity Orientations Using a Modified Terzaghi Method
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.
Correction of Line-Sampling Bias of Rock Discontinuity Orientations Using a Modified Terzaghi Method
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.
Correction of Line-Sampling Bias of Rock Discontinuity Orientations Using a Modified Terzaghi Method
Huiming Tang (Autor:in) / Junrong Zhang (Autor:in) / Lei Huang (Autor:in) / Changbin Yan (Autor:in) / Shengming Hu (Autor:in) / Mutasim Adam Mohamed Ez Eldin (Autor:in)
2018
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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Optimizing the Terzaghi Estimator of the 3D Distribution of Rock Fracture Orientations
| Online Contents | 2017
Optimizing the Terzaghi Estimator of the 3D Distribution of Rock Fracture Orientations
| British Library Online Contents | 2017
Optimizing the Terzaghi Estimator of the 3D Distribution of Rock Fracture Orientations
| Online Contents | 2017
Erratum to: Optimizing the Terzaghi Estimator of the 3D Distribution of Rock Fracture Orientations
| Online Contents | 2017
Erratum to: Optimizing the Terzaghi Estimator of the 3D Distribution of Rock Fracture Orientations
| Online Contents | 2017