| 重复剪切作用下泥质充填结构面剪切力学特性试验研究 |
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| 引用本文： | 李冠野,邓华锋,李建林,徐鹏飞,王文东,冯云杰.重复剪切作用下泥质充填结构面剪切力学特性试验研究[J].工程地质学报(英文版),2022,30(2):374-382. |
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| 作者姓名： | 李冠野 邓华锋 李建林 徐鹏飞 王文东 冯云杰 |
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| 作者单位： | 三峡库区地质灾害教育部重点实验室(三峡大学)，宜昌 443002，中国 |
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| 基金项目： | 湖北省自然科学基金创新群体项目;三峡大学级硕士学位论文培优基金项目;国家自然科学基金 |
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| 摘 要： | 结构面的力学特性直接关系工程岩体的变形稳定,而充填物对结构面的力学特性存在较大的影响.为了准确地量化充填前后结构面剪切性能的变化,以三峡库区典型库岸边坡节理岩体为研究对象,采用劈裂法制备了人工节理,按照充填度100％进行考虑,设计进行了充填前、后结构面的重复剪切试验.结果表明:(1)基于重复剪切过程中结构面抗剪性能劣化...
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| 关 键 词： | 充填结构面 重复剪切 单试件法 抗剪强度 劣化 |
| 收稿时间： | 2021-07-05 |
EXPERIMENTAL RESEARCH ON SHEAR CHARACTERISTICS OF MUD-FILLED STRUCTURAL SURFACE UNDER REPEATED SHEARING |
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| LI Guanye,DENG Huafeng,LI Jianlin,XU Pengfei,WANG Wendong,FENG Yunjie.EXPERIMENTAL RESEARCH ON SHEAR CHARACTERISTICS OF MUD-FILLED STRUCTURAL SURFACE UNDER REPEATED SHEARING[J].Journal of Engineering Geology,2022,30(2):374-382. |
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| Authors: | LI Guanye DENG Huafeng LI Jianlin XU Pengfei WANG Wendong FENG Yunjie |
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| Institution: | Key Laboratory of Geological Hazards on Three Gorges Reservoir Area(China Three Gorges University), Ministry of Education, Yichang 443002, China |
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| Abstract: | The mechanical properties of the structural surface affect the stability of the engineering rock mass directly. The filling has a greater impact on the mechanical properties of the structural surface. In order to accurately analyze the effect of filling on the shear performance of structural surface,we prepared the artificial joint samples. We take the joint rock mass of the typical reservoir bank slope in the Three Gorges Reservoir area as the research object. We operate repeated shear tests on structural surfaces before and after filling,according to the filling degree 100%.The results show the following findings. (1)Based on the law of change in the shear resistance of the structural surface during the repeated shearing process,we proposes a method for repeated shearing of single specimen before and after filling. We proposes the experimental procedure and data processing method for analyze the influence of the filling on the structural surface. It can accurately analyze the influence of fillings on the shear resistance of structural surfaces. (2)The shear resistance of the structural surface deteriorates obviously after filling. The drop rate in different normal stresses is between 38.51% ~54.82%. The greater the normal stress,the greater the reduction. (3)During repeated shear,the shear strength of the filling structure surface shows a law of increasing,then decreasing,and stabilizing. It is related to the reduction of the filling material,the expose of the structural surface and the filling of the mud. The related test methods can provide a good reference for the analysis of the shear performance on the filling structure surface |
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