| 考虑多孔介质迂回曲折效应的幂律流体柱形渗透注浆机制 |
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| 引用本文： | 杨志全,卢杰,王渊,张智伟,杨溢,朱颖彦,张杰,郭永发,陈兴贵.考虑多孔介质迂回曲折效应的幂律流体柱形渗透注浆机制[J].岩石力学与工程学报,2021(2):410-418. |
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| 作者姓名： | 杨志全 卢杰 王渊 张智伟 杨溢 朱颖彦 张杰 郭永发 陈兴贵 |
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| 作者单位： | 昆明理工大学公共安全与应急管理学院;中国科学院水利部成都山地灾害与环境研究所;云南省地质环境监测院;中铁二院昆明勘察设计研究院有限责任公司;中铁七局集团第三工程有限公司 |
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| 基金项目： | 国家自然科学基金资助项目(41861134008);云南省重点研发计划项目(202003AC100002);云南省基础研究计划面上项目(202001AT070043)。 |
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| 摘 要： | 多孔介质的迂回曲折效应对浆液在其中的渗透扩散与注浆效果具有非常重要的影响。采用理论分析,研究考虑多孔介质迂回曲折效应的幂律流体渗流运动方程,推导考虑多孔介质迂回曲折效应的幂律流体柱形渗透注浆机制;基于计算机编程技术,依托COMSOL Multiphysics平台与达西定律,二次开发得到考虑多孔介质迂回曲折效应的幂律流体柱形渗透注浆机制的三维数值模拟程序,并以此开展不同水灰比幂律型水泥浆液在砾石土体中渗透注浆过程的数值模拟;通过对比分析,研究理论分析、模型试验与数值模拟结果验证该理论机制。研究结果表明:采用考虑多孔介质迂回曲折效应的幂律流体柱形渗透注浆机制得到的扩散半径理论计算值、数值模拟值较不考虑多孔介质迂回曲折效应的幂律流体柱形渗透注浆扩散机制公式得到的扩散半径理论计算值、数值模拟值更接近注浆模型试验值,因此可较好地说明考虑多孔介质迂回曲折效应的幂律流体柱形渗透注浆机制较不考虑多孔介质迂回曲折效应的幂律流体柱形渗透注浆扩散机制公式更能反映幂律流体在多孔介质中的渗透注浆扩散规律。该研究成果可为多孔介质地层的实践注浆工程设计及施工提供一定的理论指导与技术参考。
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| 关 键 词： | 渗流力学 多孔介质 迂回曲折效应 幂律流体 柱形扩散 渗透注浆机制 |
Column penetration grouting mechanism for power-law fluids considering tortuosity effect of porous media |
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| Affiliation: | (Faculty of Public Safety and Emergency Management,Kunming University of Science and Technology,Kunming,Yunnan 650093,China;Institute of Mountain Hazards and Environment,Chinese Academy of Sciences Chengdu,Sichuan 610041,China;Yunnan Institute of Geological Environment Monitoring,Kunming,Yunnan 650216,China;Kunming Survey,Design and Research Institute Co.,Ltd.of CREEC,Kunming,Yunnan 650200,China;The Third Engineering Co.,Ltd.of China Railway Seventh Bureau Group Corporation,Xi'an,Shaanxi 710000,China) |
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| Abstract: | The tortuosity effect of porous media has an important influence on penetration diffusion and grouting effect. A seepage equation of power-law fluid considering tortuosity effect of porous media was established,and the column penetration grouting mechanism was analyzed. Based on computer programming technologies,a three-dimensional numerical simulation program for column penetration grouting of power-law fluid considering tortuosity effect of porous media was developed by using secondary development with COMSOL multiphysics platform and Darcy’s law,and numerical simulation of penetration grouting process of power-law cement grouts with different water-cement-ratios into gravel soils was carried out. Finally,comparisons among theoretical analysis,model experiments and numerical simulations were performed. Research results show that theoretical calculation values and numerical simulation values of the diffusion radius considering the tortuosity effect of porous media are closer to the model experiment values than those without considering the tortuosity effect,indicating that the developed equation better reflects column penetration grouting diffusion laws of power-law fluid into porous media. Research achievements can provide theoretical support and technical guidance for design and construction of practical grouting engineering in porous media stratums. |
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| Keywords: | seepage mechanics porous media tortuosity effect power-law fluid column diffusion penetration grouting mechanism |
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