[1]吴梦喜,邓琴芳,黄艳北..堤基管涌动态发展的数值模拟[J].郑州大学学报(工学版),2012,33(05):66-71,76.[doi:10.3969/j.issn.1671-6833.2012.05.015]
　WU Mengxi,DENG Qinfang,HUANG Yanbei.Numerical Simulation of the Dynamic Process of Levee Foundation Piping[J].Journal of Zhengzhou University (Engineering Science),2012,33(05):66-71,76.[doi:10.3969/j.issn.1671-6833.2012.05.015]
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堤基管涌动态发展的数值模拟()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
33卷
期数:
2012年05期
页码:
66-71,76
栏目:
出版日期:
2012-09-10

文章信息/Info

Title:
Numerical Simulation of the Dynamic Process of Levee Foundation Piping
作者:
吴梦喜; 邓琴芳; 黄艳北.
中国科学院力学研究所,北京,100190, 中国科学院力学研究所,北京,100190, 中国科学院力学研究所,北京,100190
Author(s):
WU Mengxi; DENG Qinfang; HUANG Yanbei
Institute of Mechanies,Chinese Academy of Scienccs,Beijing 100190,China
关键词:
堤基;  管涌;  有限元;  数值模拟
Keywords:
levee foundation ;  piping; fnite element method ; numerical simulation
分类号:
TV871
DOI:
10.3969/j.issn.1671-6833.2012.05.015
摘要:
针对表层为相对不透水的黏性土薄层,下层为砂层的二元堤基管涌问题,提出了一个模拟堤基内部以管道形式溯源发展的流土型管涌的有限元数值模型.考虑了管涌通道中含沙浓度对水流阻力的影响,按照达西公式的形式给出了管涌区域流动的等效渗透系数的计算公式,将管涌通道和非管涌区统一用常规渗流分析方法求解；引入通道边壁土壤侵蚀速率与水流剪切力的关系,建立了管道输沙平衡方程.求解渗流方程和输沙平衡方程即可获得管涌通道随时间发展的动态过程.管涌砂槽模型试验的模拟表明,该模型能够定量地模拟管涌随时间发展的动态过程.
Abstract:
Levee foundation piping is a complex and dynamie process. For the levee foundation with a thinlayer of relatively impermeable clay over the permeable sand bed, a finite element model is presented to simu-late the souree tracing development of internal soil piping. In eiew of the inlluence of sand concentration on theflow resistance, the coefficient of the equivalent permeability of the pipe flow is given according to the form ofIDarcy formula, ’Thus the simulation of both piping zone and the normal soil zone is unified to the conventionalseepage analysis method. The relationship of soil erosion rate of the pipe wall and the shear stress of the flowis introduced into the balance equation of sediment transportation to simulate the dynamic development of thepiping channel. The dynamic development of the piping channel with time is obtained by the solution of theseepage equation and the sediment transport equation, The simulation of a sand tank test on piping shows that,the model can quantitatively simulate the dynamic development of piping with time.

相似文献/References:

[1]刘忠玉..无粘性土中管涌的临界水头梯度研究[J].郑州大学学报(工学版),2003,24(04):67.[doi:10.3969/j.issn.1671-6833.2003.04.016]
　LIU Zhongyu..Study on critical head gradient of pipe surge in cohesive soil[J].Journal of Zhengzhou University (Engineering Science),2003,24(05):67.[doi:10.3969/j.issn.1671-6833.2003.04.016]

更新日期/Last Update: 1900-01-01