为探究电阻率法在黄土硅化加固过程中应用的可行性,对施加上部荷载的重塑黄土注射水玻璃,同步测试不同电流频率下的土体横向及竖向电阻率,结合土体结构对电阻率参数的变化进行了分析。试验结果显示:随着不断升高的电流频率,黄土电阻率先逐渐减小并最终趋于稳定,当电流频率范围为5×104~1×106Hz时,电流频率对黄土电阻率实测值影响较小;随着固化时间的增加,黄土竖向和横向电阻率先减小并最终趋于稳定,且减小趋势均集中在初始阶段(200 min前)。随固化时间的增加,平均结构因子和平均形状因子均呈现先减小后稳定的趋势。各向异性系数随固化时间的增加先快速增大并最终趋于稳定。
To explore the feasibility of the electrical resistivity method applying to the solidification of loess,remolded loess is injected with sodium silicate.The horizontal and vertical resistivity of the loess was measured under different current frequencies,and the variation of electrical parameters was analyzed according to the change of loess structure.The results show that resistivity decreases rapidly and then tend to be stable with the increase of current frequency.When the current frequency ranges from 5 × 104~ 1 × 106 Hz,its influence on the measured electrical resistivity is not obvious.With the increase of solidification time,the vertical and horizontal resistivity decreases(before the end of 200 minutes) and then keeps stable.The average formation and shape factors decrease and then keep stable with the increase of solicitation time.The electrical anisotropy index rapidly increases and is eventually stabilized with the increase of solidification time.