Investigating seepage flow characteristics with different sealing elements (case study: Lafour dam)

IF 1.827 Q2 Earth and Planetary Sciences

Arabian Journal of Geosciences Pub Date : 2025-02-27 DOI:10.1007/s12517-025-12219-z

Kiyoumars Roushangar, Farhad Amanzadeh, Hamidreza Abbaszadeh, John Abraham

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引用次数: 0

Abstract

A crucial issue in dam design is seepage from the dam. If water flow from dams is not adequately controlled, it can lead to problems that result in dam failure. The present study focuses on numerical modeling seepage and investigates the effects of water sealing systems on the foundation and body of an earth dam under various sustained flows. Various conditions ranging from optimal to critical have been considered in this research. The sealing elements under investigation include clay blankets, drains, and curtain grouting in the foundation. In general, the combined effects of the sealing elements, without considering their geometrical dimensions, have been studied. According to the results, a diversity in the types of flow reduction systems significantly impacts reducing flow within the dam body and foundation. Seepage discharge increases with height from the foundation floor, reaching its maximum between 38 and 46 m, and further downstream exhibits a descending trend. The combination of drains, clay blankets, and curtain grouting can, on average, reduce velocity by 83.2%, decrease seepage discharge by 15.5%, and alleviate 9.5% of the hydraulic load downstream of the dam. This combination improves hydraulics and promotes the stability of the dam.

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不同密封元件渗流特性研究（以拉福大坝为例）

大坝设计中的一个关键问题是大坝的渗漏问题。如果大坝的水流没有得到充分的控制，就会导致大坝溃坝的问题。本研究着重于渗流数值模拟，探讨了不同持续流量条件下止水系统对土坝坝基和坝体的影响。本研究考虑了从最优到临界的各种条件。所研究的密封元件包括粘土毯、排水管和基础帷幕灌浆。一般来说，在不考虑其几何尺寸的情况下，已经研究了密封元件的综合作用。结果表明，减流系统类型的多样性对坝体和坝基内的减流有显著影响。渗流量随着地基高度的增加而增加，在38 ~ 46 m之间达到最大值，再往下游则呈下降趋势。排水渠、粘土毯和帷幕灌浆相结合，平均可使坝体流速降低83.2%，渗流量降低15.5%，减轻坝体下游水力负荷9.5%。这种组合改善了水力学，促进了大坝的稳定性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Arabian Journal of Geosciences GEOSCIENCES, MULTIDISCIPLINARY-

自引率

0.00%

发文量

1587

审稿时长

6.7 months

期刊介绍： The Arabian Journal of Geosciences is the official journal of the Saudi Society for Geosciences and publishes peer-reviewed original and review articles on the entire range of Earth Science themes, focused on, but not limited to, those that have regional significance to the Middle East and the Euro-Mediterranean Zone. Key topics therefore include; geology, hydrogeology, earth system science, petroleum sciences, geophysics, seismology and crustal structures, tectonics, sedimentology, palaeontology, metamorphic and igneous petrology, natural hazards, environmental sciences and sustainable development, geoarchaeology, geomorphology, paleo-environment studies, oceanography, atmospheric sciences, GIS and remote sensing, geodesy, mineralogy, volcanology, geochemistry and metallogenesis.