巴基斯坦开伯尔-普赫图赫瓦省Koto水电项目隧道场址地质与岩土工程评价

IF 1.3 4区 工程技术 Q3 ENGINEERING, GEOLOGICAL
Nasar Khan, Muhammad Ejaz Siddiqui, N. Ullah, M. Awais, Salman Khurshid
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引用次数: 1

摘要

水电项目为应对日益增长的能源需求提供了极好的机会,但其地质和岩土工程评估是确保其长期性能和稳定性的基础。因此,进行了地质和岩土工程调查,以评估巴基斯坦开伯尔-普赫图赫瓦Koto水电站项目隧道(直径7米,长度1880米)的可行性。钻探了五个累计深度为145 m的调查钻孔,并采集了样本进行定性观察和实验室分析。进行的岩土工程勘察包括Lugeon和渗透率测试,以估计相关岩石的水力传导率。在钻孔中,发现了岩性和不连续性,如节理、裂缝、矿脉和剪切带。进行了岩性测井、岩石质量指定和岩芯回收率百分比,以了解岩石行为和强度。遇到的岩石主要是辉长岩和花岗闪长岩,还有一些角闪岩。基岩强度为R4(强),少量R3(中等),表明隧道施工的适宜性和可行性。主地幔逆冲断层(MMT)是研究区南侧的主要构造特征,但其沿线的地震活动是最佳的。地质和岩土工程勘察表明,该项目的隧道选址是可行的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Geological and geotechnical evaluation of Tunnel Site of the Koto Hydropower Project, Khyber Pakhtunkhwa, Pakistan
Hydropower projects provide excellent opportunities to cope with rising energy demands, however, their geological and geotechnical evaluation is fundamental to ensure their long-term performance and stability. Thus, geological and geotechnical investigations were carried out to evaluate the feasibility of a tunnel (7 m diameter and 1880 m length) for Koto Hydropower Project, Khyber Pakhtunkhwa, Pakistan. Five investigation boreholes with a cumulative depth of 145 m were drilled and samples were collected for qualitative observation and laboratory analyses. The performed geotechnical investigations include Lugeon and permeability tests to estimate hydraulic conductivity of the associated rocks. In the boreholes, lithologies and discontinuities such as joints, fractures, veins and shear zones were identified. Lithologic logging, rock quality designation and percentage core recovery were performed to understand rock behaviour and strength. The rocks encountered are mainly gabbronorites and granodiorites with some amphibolites. The bed rock strength is designated as R4 (strong) with minor amount of R3 (moderate) that indicates suitability and feasibility for tunnel construction. Main Mantle Thrust (MMT) is the major tectonic feature which is located towards the southern side of the study area, however, seismicity along it is optimal. The geological and geotechnical investigation deciphered that the tunnel site of the project is feasible for construction.
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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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