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Bulletin of Engineering Geology and the Environment

Erschienen in:

19.12.2019 | Original Paper

An enhanced index for evaluating natural joint roughness considering multiple morphological factors affecting the shear behavior

verfasst von: Leibo Song, Quan Jiang, Li-fu Li, Chang Liu, Xiao-pei Liu, Jun Xiong

Erschienen in: Bulletin of Engineering Geology and the Environment | Ausgabe 4/2020

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Abstract

Accurate description of joint morphology is a key issue for understanding natural joint’s shear behavior and estimating its shear strength. Five sets of joint specimens with different morphological characteristics are shearing tested under different normal loads. These test results reveal that three factors, i.e., inclination angle, asperity height, and morphology of the joint back slope along the shear direction, significantly affect shear behavior. Considering the affecting mechanism of these three factors on joint’s shear behavior, a new index, named shear roughness coefficient (SRC), is proposed to accurately estimate the shear strength of rock joints. With the help of this new index, the classical JRC-JCS shear strength model can be extended from 2D to 3D surface of natural joint, which can improve estimation accuracy and reflect the shearing direction effect on joint’s shear strength.

Vorheriger Artikel Effect of water saturation on uniaxial compressive strength and damage degree of clay-bearing sandstone under freeze-thaw

Nächster Artikel Linear discontinuous deformations created on the surface as an effect of underground mining and local geological conditions-case study

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Titel: An enhanced index for evaluating natural joint roughness considering multiple morphological factors affecting the shear behavior
verfasst von: Leibo Song
Quan Jiang
Li-fu Li
Chang Liu
Xiao-pei Liu
Jun Xiong
Publikationsdatum: 19.12.2019
Verlag: Springer Berlin Heidelberg
Erschienen in: Bulletin of Engineering Geology and the Environment / Ausgabe 4/2020
Print ISSN: 1435-9529
Elektronische ISSN: 1435-9537
DOI: https://doi.org/10.1007/s10064-019-01700-1

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