渗流作用对砂砾石层灌浆的影响试验研究

通过在试验砂槽中进行灌浆试验，研究了渗流作用对砂砾石层灌浆的影响。首先，在选定水泥浆作为灌浆材料的前提下，验证了砂砾石材料的可灌性，确定了灌浆的有关参数，包括浆液水灰比、灌浆时间、灌浆压力、灌浆深度等；其次，在无渗流作用下，研究了灌浆压力、浆液水灰比与浆液扩散范围之间的关系；最后，在有渗流作用下，通过调整上下游水位差，研究了灌浆压力、渗流强度与浆液扩散范围之间的关系。研究结果表明，渗流作用对灌浆压力与浆液扩散范围所呈的线性关系无明显影响，不同灌浆压力条件下，渗流强度与浆液扩散范围之间呈明显的非线性关系

Experimental study of influence of seepage on grouting in sandy gravels

By the grouting test in sandbox, the influence of seepage on grouting in sandy gravels is studied. First, the groutability of sandy gravels is verified on condition that the slurry is chosen as grouting material; and the relevant parameters, including water cement ratio, grouting time, grouting pressure and grouting depth are determined. Second, in the absence of seepage, the relationship between grouting pressure, water cement ratio and grout diffusion distance is studied. Finally, under seepage, the relationship between grouting pressure, hydraulic gradient and grout diffusion distance is studied by adjusting water head difference between the upstream and downstream. It is shown that there is no significant influence of seepage on the linear relationship between grouting pressure and grout diffusion distance; and that the relationship between hydraulic gradient and grout diffusion distance shows nonlinear behavior under the different grouting pressures