基于CW环氧浆液流变性的注浆扩散理论研究

Grout Diffusion Theory Based on CW Epoxy Grout's Time-varying Characteristics of Viscosity

为建立更符合实际的化学注浆扩散模型,针对CW环氧浆液的流变性能进行了多组黏度时变性试验研究,结果表明温度不变时各种配比浆液的黏度和时间存在一定的指数函数关系。结合球形、柱形注浆扩散理论,对环氧浆液的注浆量和注浆扩散半径公式进行了时变性优化。通过分析优化公式,显示环氧浆液在渗透过程中呈减速运动;当各种环境系数保持不变时,注浆最大注浆量和最大扩散半径取决于黏度与时间函数关系中参数的乘积。对比了各组环氧浆液的函数参数乘积,得到黏度增长较慢的浆液具有更好的注浆扩散能力。

In order to explore the model of chemical grout diffusion which is more consistent with reality, we con- ducted tests on the time-varying characteristics of viscosity of CW epoxy grout, and obtained that the relationship between viscosity and time at a given temperature accords with exponential function. Furthermore, according to the spherical diffusion theory and the cylindrical diffusion theory, we optimized the formulas of epoxy grout quantity and grout diffusion radius in terms of time-varying characteristics. The optimized formulas reveal that the grout is in neg- ative acceleration motion in the process of infiltration; the maximum grout diffusion radius and maximum grout quantity are dependent on the product of the parameters of viscosity-time function when other parameters which don＇ t depend on grout itself remain constant. Through comparison of the product of function parameters of different epoxy slurries, we conclude that the grout of which viscosity grows more slowly has better penetration.