考虑渗滤效应的砂土介质注浆扩散规律研究

LI Shu-cai; FENG Xiao; LIU Ren-tai; ZHANG Le-wen; HAN Wei-wei; ZHENG Zhuo

doi:10.16285/j.rsm.2017.04.001

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考虑渗滤效应的砂土介质注浆扩散规律研究

更新时间：2026-06-25

- 考虑渗滤效应的砂土介质注浆扩散规律研究
- Vol. 38, Issue 4, Pages: 925-933(2017)
- 作者机构：
  
  山东大学岩土与结构工程研究中心
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.04.001
  CLC： TU472
- Published：2017
- 稿件说明：
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[1]李术才,冯啸,刘人太,张乐文,韩伟伟,郑卓.考虑渗滤效应的砂土介质注浆扩散规律研究[J].岩土力学,2017,38(04):925-933.

LI Shu-cai, FENG Xiao, LIU Ren-tai, et al. 考虑渗滤效应的砂土介质注浆扩散规律研究[J]. 2017, 38(4): 925-933.
[1]李术才,冯啸,刘人太,张乐文,韩伟伟,郑卓.考虑渗滤效应的砂土介质注浆扩散规律研究[J].岩土力学,2017,38(04):925-933. DOI： 10.16285/j.rsm.2017.04.001.

LI Shu-cai, FENG Xiao, LIU Ren-tai, et al. 考虑渗滤效应的砂土介质注浆扩散规律研究[J]. 2017, 38(4): 925-933. DOI： 10.16285/j.rsm.2017.04.001.

摘要

在对砂土介质渗透注浆过程中

砂土骨架颗粒对水泥颗粒产生滤过作用

导致水泥颗粒发生不均匀扩散

称之为渗滤效应。采用Kozeny-Carman模型

分析了渗滤效应对砂土介质孔隙率、渗透系数及水泥浆渗流速度的影响;应用自主研发的恒压注浆装置

研究了不同颗粒级配砂样在不同注浆参数下注浆量的变化规律

然后通过多元回归获得了水泥浆扩散距离的函数关系式。试验结果表明

渗滤效应对水泥颗粒滞留封堵的影响较大

水泥颗粒质量分数是影响浆液扩散距离的主控因素。依据达西渗流定律和回归关系式分别得到了考虑渗滤效应和忽略渗滤效应时水泥浆扩散距离的理论值

并与试验值进行比对分析

结果表明

忽略渗滤效应的理论值存在较大误差。所得结论可指导注浆设计

对类似工程具有借鉴意义。

Abstract

In the process of grout penetration in sandy soil

the soil skeleton particles filtrate cement particle leading to an anisotropic diffusion

referred to as filtration effect.In this paper

Kozeny-Carman model is adopted to analyze the influence of filtration on soil porosity

permeability coefficient and slurry flow velocity.A constant pressure device is employed to investigate the grouting quantity variation of sand samples with different grading associated with different grouting parameters.Then

a quantitative relationship is obtained using multiple regression techniques.Test results show that filtration effect remarkably influences plugging behavior of cement grout and cement particle mass fraction is the main controlling factor of the grouting distance.According to Darcy’s law and regression relationship

theoretical values of grouting distance are determined with considering the filtration effect and ignoring the filtration effect respectively.Comparisons to the tested value indicate that omission of filtration effect lead to a considerable deviation of the theoretical value.Results can be used to instruct grouting design and offer references to similar projects.

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