ارزیابی ایمنی سد
ترجمه نشده

ارزیابی ایمنی سد

عنوان فارسی مقاله: ارزیابی ایمنی سد با استفاده از بررسی ژئوفیزیکی مقاومت الکتریکی ۲D و نقشه برداری زمین شناسی
عنوان انگلیسی مقاله: Dam safety assessment using 2D electrical resistivity geophysical survey and geological mapping
مجله/کنفرانس: مجله دانشگاه پادشاه سعود – علوم – Journal of King Saud University – Science
رشته های تحصیلی مرتبط: ژئوفیزیک، زمین شناسی، مهندسی عمران
گرایش های تحصیلی مرتبط: زمین شناسی مهندسی، خاک و پی یا ژئوتکنیک، آب و سازه هیدرولیکی
کلمات کلیدی فارسی: بررسی مقاومت الکتریکی دو بعدی، نقشه برداری زمین شناسی و ساختاری، وارونگی توموگرافی، سد، سنگهای پیچیده زیرزمینی
کلمات کلیدی انگلیسی: Two-dimensional electrical resistivity survey، Geological and structural mapping، Tomographic inversion، Dam، Basement complex rocks
نوع نگارش مقاله: مقاله پژوهشی (Research Article)
نمایه: Scopus – Master Journals List – JCR
شناسه دیجیتال (DOI): https://doi.org/10.1016/j.jksus.2019.10.016
دانشگاه: Department of Applied Geophysics, University of Ilorin, PMB 1515, Ilorin, Kwara State, Nigeria
ناشر: الزویر - Elsevier
نوع ارائه مقاله: ژورنال
نوع مقاله: ISI
سال انتشار مقاله: 2020
ایمپکت فاکتور: 2.942 در سال 2019
شاخص H_index: 27 در سال 2020
شاخص SJR: 0.434 در سال 2019
شناسه ISSN: 1018-3647
شاخص Quartile (چارک): Q1 در سال 2019
فرمت مقاله انگلیسی: PDF
تعداد صفحات مقاله انگلیسی: 7
وضعیت ترجمه: ترجمه نشده است
قیمت مقاله انگلیسی: رایگان
آیا این مقاله بیس است: خیر
آیا این مقاله مدل مفهومی دارد: ندارد
آیا این مقاله پرسشنامه دارد: ندارد
آیا این مقاله متغیر دارد: ندارد
کد محصول: E14878
رفرنس: دارای رفرنس در داخل متن و انتهای مقاله
فهرست مطالب (انگلیسی)

Abstract


۱٫ Introduction


۲٫ Description of the study area


۳٫ Materials and methods


۴٫ Discussion of results


۵٫ Conclusion


Conflict of interest


Acknowledgements


References

بخشی از مقاله (انگلیسی)

Abstract


A combination of Geological mapping and two-dimensional electrical resistivity (2D-ER) surveys was applied to study the Unilorin Dam and its environment. The purpose of the study was to investigate the dam for structural anomalies that may compromise the purpose and safety of the dam. Field equipment for the study comprised a SuperSting R8/IP Multi-Electrodes Resistivity Meter, 84 metallic electrodes and the accessories, compass clinometer, and portable GPS equipment. Geological data were processed and plotted to obtain a Geological Map and Rosette Diagram that were used for structural interpretations. The structures interpreted include an asymmetric fold and a strike-slip fault. The 2D resistivity data were processed and tomographically inverted to obtain the resistivity models of the subsurface around the dam. Interpretations of 2D resistivity models showed that the dam reservoir floor is underlain by competent basement rocks, however, the basement rock is weathered in some places. Patches of low resistivities structures interpreted as seepages, fractures and water-saturated cavity were delineated in different sections of the dam. The surface structural elements from geological study support the subsurface structures interpreted in the 2D resistivity models. Weathered structures, fractures, and seepage in the reservoir floor constitute areas of excessive water loss in the dam. The cavity delineated in the dam foundation is a potential threat to the dam’s safety. The dam section with cavity has been referred to structural engineers for detailed study.


Introduction


Safety assessment test on civil engineering constructions such as dams, tunnels, and bridges is a necessary endeavor to forestall sudden failure and collapse of engineering infrastructure. The mechanical properties of old dams that have outlived their life span, or new dams affected by natural hazards might have suffered degradation that can cause some structural damages that may not be obvious on the surface. If such damages are not detected by routine safety checks and addressed in good time, it may deteriorates and consequently lead to the failure of the dam. A dam is a barrier constructed to slow down, direct, or obstruct the free flow of water. The purpose of dam construction includes irrigation, supply of water for human and industry uses, hydro-electric power generation, control of flood, fish rearing, recreation, and navigation (Biswas and Charttergee, 1971; Plata and Iragüen, 1992). In addition to water scarcity, dam failure can lead to flooding and monumental loss of lives and properties. The old method of dam testing for structural damages include drilling and sample testing. Usually, 250–۳۰۰ mm hole(s) is drilled in some parts of the dam and the samples collected are structurally examined and tested in the laboratory. Despite the cost and time required, drilling provide limited information on the possible structural anomalies/damages in dams (Kepler et al., 2000).

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