动水条件下渗透注浆扩散机理研究

发布时间：2018-04-18 06:27

本文选题：动水注浆 + 渗透注浆　；参考：《现代隧道技术》2017年01期

【摘要】：渗透注浆过程中,地下水流动对浆液扩散过程有显著影响。基于此。文章应用流体两相渗流理论描。述动水条件下的渗透注浆扩散过程,并建立相应的有限元模型对注浆过程进行数值模拟,分析了动水条件下的浆液扩散规律及浆液扩散范围影响因素。研究结果表明:动水条件下浆液沿顺水流方向呈轴对称的U形分布。动水流场限制注浆影响范围;浆液横向扩散与纵向扩散、顺水扩散与逆水扩散存在明显差异性,注浆压力与浆液流速在注浆孔附近衰减显著;地下水流场与注浆压力是影响浆液扩散范围的主控因素,浆液扩散范围与注浆压力正相关而与动水流速负相关;最后对动水条件下的渗透注浆设计及工艺提出了改进方法。
[Abstract]:In the process of permeation grouting, groundwater flow has a significant effect on the slurry diffusion process.Based on this.This paper applies the theory of fluid two-phase seepage.The seepage grouting diffusion process under dynamic water condition is described and the corresponding finite element model is established to simulate the grouting process. The law of slurry diffusion and the influencing factors of slurry diffusion range under dynamic water condition are analyzed.The results show that the slurry has an axisymmetric U-shape distribution along the flow direction under hydrodynamic conditions.The influence range of grouting is limited by hydrodynamic flow field, there are obvious differences between transverse diffusion and longitudinal diffusion of grouting fluid, along water diffusion and countercurrent diffusion, and the grouting pressure and velocity of grouting decrease significantly near the grouting hole.The groundwater flow field and grouting pressure are the main controlling factors affecting the grouting diffusion range, which is positively correlated with the grouting pressure and negatively correlated with the hydrodynamic velocity. Finally, an improved method is put forward for the design and process of permeable grouting under the dynamic water condition.
【作者单位】：山东大学岩土与结构工程研究中心;
【基金】：国家自然科学基金项目(41272385) 山东大学自主创新基金项目(2012ZD041) 教育部新世纪优秀人才支持计划(NCET-11-0317)
【分类号】：TU94;P641.2

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