沥青混凝土心堤坝与粘土心堤坝的相对性能评价——应用Plaxis软件

Nuresa Merga Bayisa
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引用次数: 2

摘要

本文将沥青混凝土心堤坝与粘土心堤坝进行对比研究,从安全和防渗的角度来看,沥青混凝土心堤坝具有重要意义。坝体分析采用有限元软件Plaxis 8.5,渗流分析采用Geostudio 2012。相对分析结果表明,沥青混凝土心坝在稳态状态和施工结束时的稳定性方面均取得了较好的安全系数效果。在稳态状态下,计算出的粘土心坝安全系数为1.466,未达到USACE推荐的最小安全系数。但是,在相同的条件下,沥青混凝土心坝的稳定性分析结果为1.661,在推荐范围内。同样,在施工结束时,粘土心坝的安全系数计算为1.553,而在此荷载条件下(施工结束),沥青混凝土心坝的稳定性分析结果为1.600,使大坝更加稳定。沥青混凝土心坝的渗流分析结果也不显著。一般情况下,在堆石坝中应用沥青混凝土芯材可以满足各种荷载条件下的基本要求和最小安全系数,并且这种类型的坝是无渗流的,这一点已经得到了许多研究人员的广泛认可。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Relative Performance Evaluation of Asphaltic Concrete Core Embankment Dam and Clay Core Embankment Dam: By Plaxis Software Application
This paper investigates asphaltic concrete core embankment dam in relative to the clay core embankment dam so that it is vital from the perspective of safety and controlling seepage. Plaxis 8.5, finite element based software was employed for analysis of the dam and Geostudio 2012 for seepage analysis. Relatively the result of analysis shows that good result of safety factor has been found in asphalt concrete core dam with regard to the stability of the dam during steady-state condition and end of construction. During steady-state condition, the factor of safety computed for clay core dam was 1.466, and the dam fails to attain the minimum factor of safety recommended by USACE. But, under this similar condition stability analysis result of asphalt concrete core dam gave a good result of 1.661 which is found within the recommended range. Likewise, at the end of construction, the factor of safety computed for clay core dam was 1.553, but, under this loading condition (end of construction) stability analysis result of asphalt concrete core dam gave a good result of 1.600 which keeps the dam more stable. The seepage analysis result of asphaltic concrete core dam is also insignificant. Generally, application of asphalt concrete core in rock fill dam can fulfill the basic requirement and minimum factor of safety under all loading condition, and dam of such types is seepage free as it shown here and approved by many other researchers’ extensive works.
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