Stress effect & scale effect on shear properties of double saw-tooth rock joint surface-Reference-Cited by-同舟云学术

Stress effect & scale effect on shear properties of double saw-tooth rock joint surface

Published:2021-01-01 Issue:1 Volume:31 Page:39-49
ISSN:1617-8106
Container-title:Applied Rheology
language:en
Short-container-title:

Author:

Luo Zhanyou¹,Jiang Mingyao²,Mo Linfei²,Zou Baoping²,Huang Man³

Affiliation:

1. Tunnel & Underground Space Academy , Zhejiang University of Science and Technology , Hangzhou 310023 , Zhejiang , China ; Institute of Rock Mechanics , Ningbo University , Ningbo 315211 , Zhejiang , China ; Department of Civil Engineering , Shaoxing University , Shaoxing 312000 , Zhejiang , China

2. Tunnel & Underground Space Academy , Zhejiang University of Science and Technology , Hangzhou 310023 , Zhejiang , China

3. Department of Civil Engineering , Shaoxing University , Shaoxing 312000 , Zhejiang , China

Abstract

Abstract The shear properties of rock joint control the stability of rock and have an important impact on natural disasters such as landslides and debris flow. In order to study the stress effect and scale effect of shear properties of double saw-tooth rock joint, cement mortar is selected as similar material, a series of mix ratio tests are carried out, and the best mix ratio is obtained. Using rock joint integrated mold and joint panel produced by 3D printing technology, several groups of double saw-tooth joint specimens with different saw-tooth heights, saw-tooth widths, and saw-tooth spacings are made. Under multiple levels of normal stress, direct shear tests of different scale specimens are carried out by self-developed multifunctional rock-soil contact damage test system. Results show that the shear failure modes of double saw-tooth rock joint include couple effect of overriding and cutting off, and cutting off effect, which are mainly controlled by the rock joint morphology and normal stress. Peak shear strength increases with the increase of saw-tooth width and spacing, but the change with saw-tooth height is not obvious. Peak shear strength and peak friction angle of the double saw-tooth rock joint have significant characteristics of stress effect and scale effect.

Publisher

Walter de Gruyter GmbH

Subject

Condensed Matter Physics,General Materials Science

Link

https://www.degruyter.com/document/doi/10.1515/arh-2020-0117/pdf

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