| 堤坝管涌发展的改进模型 |
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| 引用本文： | 李大广.堤坝管涌发展的改进模型[J].辽宁工程技术大学学报(自然科学版),2011,30(4):526-529. |
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| 作者姓名： | 李大广 |
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| 作者单位： | 天津大学建筑工程学院,天津,300072 |
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| 基金项目： | 国家重点基础研究发展计划“973计划”基金资助项目(2007CB714101) |
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| 摘 要： | 为了解决管涌通道的发展问题和管涌发展的数值计算问题,根据管涌实际形成机理,对管涌的微观物理模型进行了改进:在可动颗粒系统中,对可动颗粒按照粒径的大小进行分类,每个可动粒组作为一个整体圆管,按照粒径大小顺序,从通道管壁向中心依次排列。根据建立的新模型推导出新的可动颗粒起动的临界水头公式,并计算了两种典型级配土样的临界水头。结果表明:改进模型具有可行性和先进性,更适用于管涌动态发展的数值计算,为管涌的研究提供了更为简便的方法,并为管涌的数值计算进一步发展提供一个可行的新思路。?
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| 关 键 词： | 管涌 堤坝管涌 管涌临界面 水力梯度 可动颗粒 数值计算 |
Improved model analysis on dam piping development |
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| LI daguang.Improved model analysis on dam piping development[J].Journal of Liaoning Technical University (Natural Science Edition),2011,30(4):526-529. |
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| Authors: | LI daguang |
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| Institution: | LI daguang(College of Civil Engineering,Tianjin University,Tianjin 300072,China) |
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| Abstract: | In order to investigate the evolution and numerical calculation on piping,an improved micro physical model of the piping was developed based on the formation mechanism of piping in this study.In the moving particle system,the moving particles are classified according to their sizes.Each moving particle plays its role as a whole tube and is arranged in the order of their priority from channel wall to center.Based on the new improved model,a critical head gradient formula was derived.The case studies show tha... |
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| Keywords: | piping dam piping piping critical seepage gradient moving particles numerical calculation |
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