文献类型：期刊文献

英文题名：A Study of Instantaneous Shear Mechanical Properties on the Discontinuity of Rock Mass Based on 3D Morphological Properties

作者：Zhang, Qingzhao[1,2];Luo, Zejun[1,2];Jang, Bo-An[3];Wang, Qiuyi[4];Zhong, Zhen[5];Jiang, He[6]

机构：[1]Tongji Univ, Dept Geotechn Engn, Shanghai, Peoples R China;[2]Tongji Univ, Key Lab Geotechn & Underground Engn, Minist Educ, Shanghai, Peoples R China;[3]Kangwon Natl Univ, Dept Geophys, 1 Kangwondaehak gil, Chunchon 24341, Gangwon, South Korea;[4]Yunnan Gongdong Expressway Construct Headqua, Kunming, Yunnan, Peoples R China;[5]Shaoxing Univ, Key Lab Rock Mech & Geol Hazards Zhejiang Prov, Shaoxing, Zhejiang, Peoples R China;[6]YCIC Highway Construct Co Ltd, Kunming, Yunnan, Peoples R China

年份：2021

卷号：2021

外文期刊名：GEOFLUIDS

收录：SCI-EXPANDED(收录号：WOS:001195318100001)、、Scopus(收录号：2-s2.0-85120807967)、WOS

基金：This work was supported by the National Natural Science Foundation of China (No. 41977227), the Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province, Key Technology of Highway Tunnel Safety Construction Under Complex Condition in Eastern Yunnan Mountainous Area, Research on Key Technology of Corrugated Steel Assembly Rapid Initial Support Structure for Highway Tunnel, the Shanghai Rising-Star Program (No. 17QC1400600), and the Shanghai Municipal Science and Technology Major Project (No. 2017SHZDZX02).

语种：英文

外文摘要：In order to study the instantaneous mechanical properties of rock mass discontinuities with different 3D morphologies during the shear process, the Brazilian splitting method is used to prepare natural rock mass discontinuities, and the high-precision 3D scanning test of discontinuities is carried out. The Z(2) is selected as the evaluation parameter of the discontinuities. Based on the graded cyclic shear test results of discontinuities, the influence of the morphology characteristics on the strength and deformation characteristics is analyzed. With the increase of shear times, the 3D morphology characteristic parameters of the structural plane decrease steadily after the graded cyclic shear. Based on the test curve, the graded cyclic shear characteristics of rock mass discontinuities are analyzed from the shear deformation, and the shear process of the discontinuities is finely divided by combining with the variation characteristics of shear stiffness. Combined with the 3D morphology parameters, an empirical formula for the shear strength of discontinuities is proposed. Through verification, the effect of the new model is better than that of the classical JRC-JCS model.