文献类型：期刊文献

英文题名：Stress effect & scale effect on shear properties of double saw-tooth rock joint surface

作者：Luo, Zhanyou[1,2,3];Jiang, Mingyao[1];Mo, Linfei[1];Zou, Baoping[1];Huang, Man[3]

机构：[1]Zhejiang Univ Sci & Technol, Tunnel & Underground Space Acad, Hangzhou 310023, Zhejiang, Peoples R China;[2]Ningbo Univ, Inst Rock Mech, Ningbo 315211, Zhejiang, Peoples R China;[3]Shaoxing Univ, Dept Civil Engn, Shaoxing 312000, Zhejiang, Peoples R China

年份：2021

卷号：31

期号：1

起止页码：39

外文期刊名：APPLIED RHEOLOGY

收录：SCI-EXPANDED(收录号：WOS:000721741800001)、、Scopus(收录号：2-s2.0-85126104679)、WOS

基金：This paper was supposed by the Na-tional Natural Science Foundation of China (No. 41572299, 41602308, 41427802) and Special Support Plan for High Level Talents of Zhejiang Province (2020R52028) . Their sup-port is gratefully acknowledged.

语种：英文

外文关键词：Double saw-tooth rock joint; Stress effect; Scale effect; Shear strength; Peak friction angle

外文摘要：May 30, 2021; accepted Aug 10, 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.