| 大理岩规则齿形结构面剪切特性试验研究 |
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| 引用本文： | 周辉,程广坦,朱勇,陈珺,卢景景,崔国建,杨聘卿.大理岩规则齿形结构面剪切特性试验研究[J].岩土力学,2019,40(3):852-860. |
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| 作者姓名： | 周辉 程广坦 朱勇 陈珺 卢景景 崔国建 杨聘卿 |
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| 作者单位： | 1. 中国科学院武汉岩土力学研究所 岩土力学与工程国家重点试验室，湖北 武汉 430071；2. 中国科学院大学，北京 100049；
3. 山东农业大学 水利土木工程学院，山东 泰安 271018；4. 中煤科工集团重庆研究院有限公司，重庆 400039 |
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| 基金项目： | 国家自然科学基金项目（No.51427803，No.51709257）；国家重点基础研究发展计划（973）项目（No.2014CB046902）。 |
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| 摘 要： |
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| 关 键 词： | 锯齿结构面 直剪试验 强度特性 剪胀特征 剪切刚度 |
| 收稿时间： | 2017-05-15 |
Experimental study of shear deformation characteristics of marble dentate joints |
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| ZHOU Hui,CHENG Guang-tan,ZHU Yong,CHEN Jun,LU Jing-jing,CUI Guo-jian,YANG Pin-qing.Experimental study of shear deformation characteristics of marble dentate joints[J].Rock and Soil Mechanics,2019,40(3):852-860. |
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| Authors: | ZHOU Hui CHENG Guang-tan ZHU Yong CHEN Jun LU Jing-jing CUI Guo-jian YANG Pin-qing |
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| Institution: | 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China; 3. College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Tai’an, Shandong 271018, China; 4. China Coal Technology Engineering Group
Chongqing Research Institute, Chongqing 400039, China |
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| Abstract: | This study is aimed to investigate the regularities of the shear strength, shear deformation and other mechanical properties of joint rock mass with different roughnesses under compression-shear stress. Marble specimens were prepared with the dentate height of 0, 1 and 3 mm, respectively. Then direct shear tests were conducted on the marble specimens under different normal stresses. Experiment results show that curves of shear stress and displacement can be divided into two types: sliding failure type and peak shear type. The climbing-gnawing process of joints goes through four stages: the compaction stage, the climbing stage, the saw-tooth cutting stage and the completely crushing stage. The curves of shear strength with the normal stress of the dentate joint present more obviously three-segment line feature, and a trilinear shear strength criterion is established. The curves of shear stiffness with normal stress present a convex type, and a shear stiffness model is put forward. The dilatancy curves of dentate joint present firstly shear contraction and then shear dilation, and an empirical formula for evaluating shear dilation is proposed. |
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| Keywords: | dentate joints direct shear test strength characteristics dilatancy characteristics shear stiffness |
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