A comprehensive investigation on the shear properties of interlayer shear weakness zones
文献类型：期刊论文
| 作者 | Han, Gang3,4; Zhou, Hui3,4; Hou, Jing2; Zhang, Chuanqing3,4; Singh, Hemant Kumar1,3,4; Gao, Yang3,4 |
| 刊名 | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
 |
| 出版日期 | 2021-11-01 |
| 卷号 | 80期号:11页码:8765-8787 |
| 关键词 | Interlayer shear weakness zones Shear behaviour Numerical simulation Infilling ratio Failure modes First- and second-order asperities |
| ISSN号 | 1435-9529 |
| DOI | 10.1007/s10064-021-02430-z |
| 英文摘要 | Interlayer shear weakness zone (ISWZ) is a type of weak deformation zone in stratified rock masses with variable thicknesses and undulations, which is a major threat for many rock engineering construction projects on or within rock masses because of their poor mechanical properties and large-scale distributions. Existing studies mainly focused on the shear behaviours of weak interlayers of ISWZs without considering the effects of variable thickness and undulation. This study investigates the real occurrence of ISWZs located in the Baihetan Hydropower Station, and a metre-level 2D numerical geological model containing variable thickness and undulation of ISWZ was developed using the particle flow code PFC2D. A series of numerical direct shear tests were performed to investigate the shear properties of ISWZs considering the infilling ratios, joint roughness coefficient (JRC), and normal stress. The experimental results show that the infilling ratio is a vital parameter that controls the failure modes, shear strength, and shear dilatancy of ISWZs. The dilatancy and interlayer separation were found insignificant under high normal stresses compared to the cases under lower normal stresses. In case of first-order asperities, wear/striation mode failure changed to shearing off mode gradually with an increase in normal stresses. The role of structural surface asperities in shear resistance decreases with normal stress and infilling ratios. The second-order asperities tend to increase the dilatancy phenomenon if the infilling ratio is limited as well as the normal stress. The uniqueness and major finding of this study were discussed in detail. The results of this study will provide a new basis to investigate the shear properties of ISWZs at an engineering scale. |
| 资助项目 | National Natural Science Foundation of China (NSFC)[41941018] ; Key Projects of the Yalong River Joint Fund of the National Natural Science Foundation of China[U1865203] ; National Key Research and Development Program of China[2019YFC0605104] ; Hubei Province Natural Science Foundation innovation group[2018CFA013] ; Youth Innovation Promotion Association CAS |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000707695900001 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/28488]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zhou, Hui |
| 作者单位 | 1.Rajiv Gandhi Inst Petr Technol, Dept Petr Engn & Geoengn, Amethi 229304, UP, India 2.Power China Huadong Engn Corp, Hangzhou 310014, Zhejiang, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Han, Gang,Zhou, Hui,Hou, Jing,et al. A comprehensive investigation on the shear properties of interlayer shear weakness zones[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2021,80(11):8765-8787. |
| APA | Han, Gang,Zhou, Hui,Hou, Jing,Zhang, Chuanqing,Singh, Hemant Kumar,&Gao, Yang.(2021).A comprehensive investigation on the shear properties of interlayer shear weakness zones.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,80(11),8765-8787. |
| MLA | Han, Gang,et al."A comprehensive investigation on the shear properties of interlayer shear weakness zones".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 80.11(2021):8765-8787. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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