幂律型浆液扩散半径研究

Study on grouting diffusion radius of exponential fluids

基于广义达西定律及球形扩散理论模型,推导出幂律型浆液在砂土中进行渗透注浆时有效扩散半径计算公式。分析了注浆压力差随浆液流变参数c和n及浆液扩散半径的变化情况。注浆压力差随流变参数c,n分别呈线性和非线性变化,浆液扩散半径增大所需的注浆压力差也相应的增加,增长的幅度受浆液流变参数的影响显著。

Based on the generalized Darcy＇s Law and theory for spherical diffusion model, a formula for calculating the effective diffusion radius of exponential fluids injected into homogeneous sandy stratum in grouting is deduced. It shows that the grouting pressure difference is related to the grout rheology parameters c, n and the diffusion radius. The grouting pressure, difference change with c by lineafity rule and with n by nonlinearity rule. Grouting pressure difference increases with increasing＂ radius, and the increasing grades are notably affected by the grout rheological parameters.