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对管涌机理的新认识

罗玉龙, 速宝玉, 盛金昌, 詹美礼

罗玉龙, 速宝玉, 盛金昌, 詹美礼. 对管涌机理的新认识[J]. 岩土工程学报, 2011, 33(12): 1895-1902.
引用本文: 罗玉龙, 速宝玉, 盛金昌, 詹美礼. 对管涌机理的新认识[J]. 岩土工程学报, 2011, 33(12): 1895-1902.
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LUO Yu-long, SU Bao-yu, SHENG Jin-chang, ZHAN Mei-li. New understandings on piping mechanism[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(12): 1895-1902.
Citation: LUO Yu-long, SU Bao-yu, SHENG Jin-chang, ZHAN Mei-li. New understandings on piping mechanism[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(12): 1895-1902.
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对管涌机理的新认识  English Version

  • ( 河海大学水利水电学院，江苏 南京 210098)

基金项目: 国家自然科学基金项 目（ 51009053 ）； 高等学校博士学科点专项科研基金项目 （ 20100094120004 ）；江苏高校优势学科建设工程资助项目（水利工程）
详细信息
    作者简介:

    罗玉龙 (1980 – ) ，男，辽宁凌源人，博士后，讲师，从事渗流力学研究。

  • 中图分类号: TV139.1

New understandings on piping mechanism

  • (College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China)

摘要

    摘要
  • 摘要: 基于原状土的实际受力特点，提出新的管涌机理：管涌是涉及孔隙水渗流、可动细颗粒侵蚀运移、多孔介质变形等众多复杂力学行为的多相多场耦合现象。在详细归纳评述最新研究进展的基础上，提出了今后研究的总体思路：首先利用三向受压状态下土体的渗流–侵蚀–应力耦合管涌试验，建立耦合管涌本构方程，揭示三向受压状态下土体管涌发展的渗流–侵蚀–应力耦合机理；然后基于溶质运移的思想，建立预报原状地基土体管涌发展过程的渗流–侵蚀–应力耦合数学模型。同时指出渗流–侵蚀–应力耦合试验的可重复性及三相三场全耦合纯对流管涌模型的高效求解策略是需要重点解决的关键科学问题。提出的新的管涌机理为客观认识管涌问题的本质提供了一种新的角度，今后的研究成果将对堤坝管涌险情的科学预报和有效治理具有重要的指导作用。
    Abstract: A new piping mechanism is proposed based on the real stress state of undisturbed soil: piping is a multi-phase and multi-field coupling phenomenon involving numerous complicated mechanical behaviors, such as pore water seepage, fluidized particle erosion and migration, and deformation of porous media. Based on summarizing and reviewing the new achievements of the piping mechanism, the general idea on the future studies is proposed: firstly, a list of triaxial compression seepage-erosion-stress coupling piping experiments is put forward, and the coupling piping constitutive equations revealing the seepage-erosion-stress coupling mechanism are established based on the coupling experiments. Then the seepage-erosion-stress coupling piping mathematical model for predicting undisturbed soil is proposed based on the solute transport theory. The key scientific problems including the repeatability of coupling experiments and efficient solution strategy for the multi-phase and multi-field full coupling pure convection piping model are also put forward. The proposed new piping mechanism provides a new point of view on the essence of piping, and the future research results will be of significance to the prediction and treatment of embankment piping. The proposed new piping mechanism provides a new point of view on the essence of piping, and the future research results will be of significance to the prediction and treatment of embankment piping.
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