Understanding the Seepage Behavior of Nai Gaj Dam through Numerical Analysis

IF 1.5 0 ENGINEERING, MULTIDISCIPLINARY Engineering, Technology & Applied Science Research Pub Date : 2022-02-12 DOI:10.48084/etasr.4560

A. Bashir, Ritwick Chaudhry, A. Qureshi, U. Memon, N. Bheel

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引用次数: 3

Abstract

This study presents the seepage patterns of earth-fill dams, using critical situations by employing the finite element approach. The Nai Gaj dam is 65km northwest of Dadu city in Sindh Province, Pakistan. In this study, the seepage through the main dam body and foundation is computed and simulated for different scenarios, i.e. maximum, normal, and minimum reservoir level. Seepage analysis was conducted by using the SEEP/W sub-program of GEO-SLOPE software. Dam design parameters and dam geometry data were used as input data to compute the unknown seepage. The seepage behavior of the Nai Gaj dam is shown in terms of net flow which consists of equipotential lines, streamlines, velocity vectors, and phreatic lines. The results show the seepage flux, maximum seepage, and exit gradient at different reservoir levels. The results show that the average flow rate at normal, maximum, and minimum reservoir levels are 1.49×10-7cumec/m, 3.38×10-7cumec/m, and 2.108×10-8cumec/m respectively. In addition, the overall stability of the side slope of the dam is discussed.

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通过数值分析了解奈嘎坝渗流特性

本研究采用有限元方法，在临界情况下给出了土坝的渗流模式。Nai Gaj大坝位于巴基斯坦信德省大都市西北65公里处。在本研究中，计算和模拟了不同情况下，即水库最高水位、正常水位和最低水位下，主坝体和基础的渗流。采用GEO-SLOPE软件的SEEP/W子程序进行渗流分析。以坝体设计参数和坝体几何数据作为输入数据，计算未知渗流。用等值线、流线、速度矢量和潜水线组成的净流量来表示奈嘎坝的渗流特性。结果显示了不同库容下的渗流通量、最大渗流量和出口梯度。结果表明:正常、最大、最小水库水位下的平均流量分别为1.49×10-7cumec/m、3.38×10-7cumec/m和2.108×10-8cumec/m。此外，还对坝体边坡的整体稳定性进行了讨论。

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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