Optimum Size for Clay Core of Alavian Earth Dam by Numerical Simulation

iranica journal of energy and environment Pub Date : 2014-07-01 DOI:10.5829/IDOSI.IJEE.2014.05.03.03

A. Farzampour, F. Salmasi, Behnam Mansuri

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引用次数: 4

Abstract

Seepage in embankment dams is one of the important factors in stability and dam's maintenance. Core in earth dam is essential for waterproofing and controlling of seepage. Therefore, selection of proper materials and sizes for core of earth dam are very important. Thick clay core is proper for waterproofing but because of low shear strength of the clay, it would be dangerous for dam's stability. The optimal core would be the core which has proper waterproofing, stability safety factor and also with economic condition. In this study, the aim is to determine the optimum size for clay core of Alavian dam near Maragheh city in steady state seepage condition. For this purposes, Geo-Studio pack is used for numerical simulation. In addition, simulation of seepage and slope stability for the built maps of the dam, 11 more models of the dam with different size of cores were tested to find the optimum core thickness. From these models, data required for objective function and constraints using regression techniques for seepage, hydraulic gradient and stability safety factor were provided. Results showed that optimized volume of the core is 35% smaller than the present core.

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阿拉维土坝泥心最优尺寸的数值模拟

堤防坝体渗流是影响坝体稳定和维护的重要因素之一。土坝岩心是土坝防渗防渗的重要组成部分。因此，选择合适的土坝芯材和芯材尺寸是十分重要的。较厚的粘土心适合防水，但粘土抗剪强度较低，不利于大坝的稳定。最佳的岩心是具有适当的防水性能、稳定安全系数和经济条件的岩心。本研究的目的是确定马拉赫市附近Alavian大坝在稳态渗流条件下粘土芯的最佳尺寸。为此，使用Geo-Studio包进行数值模拟。在此基础上，对坝体已建图进行了渗流和边坡稳定性模拟，并对11个不同岩心尺寸的坝体模型进行了试验，以确定最佳岩心厚度。从这些模型中，利用回归技术给出了渗流、水力梯度和稳定安全系数的目标函数和约束所需的数据。结果表明，优化后的岩心体积比现有的岩心体积小35%。

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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iranica journal of energy and environment

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