大坝溢洪道现有节理方位参数及其对岩石侵蚀性影响的比较

IF 1.3 4区 工程技术 Q3 ENGINEERING, GEOLOGICAL Quarterly Journal of Engineering Geology and Hydrogeology Pub Date : 2023-08-17 DOI:10.1144/qjegh2022-042
Marie-Hélène Wisse, A. Saeidi, M. Quirion
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引用次数: 0

摘要

无衬砌溢洪道中的岩体侵蚀会造成严重的结构损坏,需要昂贵的维修。岩体由各种节理组排列形成的块体组成。这些块体的体积和突起,以及节理的方向、开口和粗糙度,都是影响岩石可蚀性的特征。这些特征中的大多数都包含在为岩体表征而开发的参数中。本文使用一个包含冲刷溢洪道地质和水力信息的数据库,对三个节理方位参数进行了比较。根据详细的方法,首先使用GSI图表索引根据岩石质量对数据进行分类。然后,对于每个GSI图表类别,根据所选择的损伤级别、流功率和联合方向参数来分配数据。本研究表明,目前没有一个节理方位参数能够准确地表示节理方位对优质至劣质岩体侵蚀的影响。此外,本研究表明GSI图指数并不是一个完全评估岩石侵蚀的岩石质量指数,因为没有考虑一些评估岩石可蚀性的相关参数。
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Comparison of Existing Joint Orientation Parameters and Their Effect on Rock Erodibility in Dam Spillways
Rock mass erosion in unlined spillways causes significant structural damage and necessitates expensive repairs. The rock mass is made up of blocks formed by various arrangements of joint sets. The volume and the protrusion of these blocks, as well as the orientation, opening and roughness of the joints, are all features that can affect rock erodibility. Most of these features are incorporated in parameters developed for rock mass characterization. Three joint orientation parameters are compared in this article using a database containing geological and hydraulic information on scoured spillways. According to the detailed methodology, data is first classified according to rock quality using the GSI chart index. Then, for each GSI chart class, data is distributed according to the damage level, stream power and joint orientation parameter chosen. This study shows that no joint orientation parameter is currently able to accurately represent the effect of joint orientation on erosion of excellent- to poor-quality rock mass. Moreover, this study shows that the GSI chart index is not a rock quality index that completely evaluates rock erosion, since some relevant parameters for evaluating rock erodibility are not considered.
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来源期刊
CiteScore
3.40
自引率
14.30%
发文量
66
审稿时长
6 months
期刊介绍: Quarterly Journal of Engineering Geology and Hydrogeology is owned by the Geological Society of London and published by the Geological Society Publishing House. Quarterly Journal of Engineering Geology & Hydrogeology (QJEGH) is an established peer reviewed international journal featuring papers on geology as applied to civil engineering mining practice and water resources. Papers are invited from, and about, all areas of the world on engineering geology and hydrogeology topics. This includes but is not limited to: applied geophysics, engineering geomorphology, environmental geology, hydrogeology, groundwater quality, ground source heat, contaminated land, waste management, land use planning, geotechnics, rock mechanics, geomaterials and geological hazards. The journal publishes the prestigious Glossop and Ineson lectures, research papers, case studies, review articles, technical notes, photographic features, thematic sets, discussion papers, editorial opinion and book reviews.
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