泥砂介质注浆渗流通道形成力学机理分析

为研究在泥砂介质中的注浆渗流通道形成机理,设计了注浆实验系统;并由实验结果可知化学浆液在泥沙介质中渗流的主要形式为柱形渗流和面形渗流两种;在格里菲斯判据的基础上,推导了浆液形成渗流通道所需要的最小注浆压力p min;在渗流力学的基础上分析了浆液在介质中渗流的的压力损失,得知浆液在渗流通道不同位置处的注浆压力p1;当p1p min时,浆液将劈裂被注介质形成新的渗流通道;当p1p min时,浆液将停止劈裂被注介质,该通道封闭。

Mechanical Mechanism Analysis of Forming Grouting Seepage Channel in Clay sand Medium

In order to research the forming mechanism of grouting seepage channel in the clay sand medium, Designed the grouting experiment system; And knowing the chemical grouting seepage in the clay sand medium mainly have two main forms that cylindricality seepage and surface shape seepage by the experimental result; On the basis of Griffith criterion, deduced the minimum grouting pressure Pmin that forming the Chemical grou- ting seepage channel, Analysis the pressure loss of the Chemical grouting seepage in the medium on the basis of percolation mechanics , obtained Grouting pressure Pl that in the different positions of the seepage channel; when p1 〉 pmin , Chemical grout will split the medium that forming new seepage channel;when p1 〈 pmin, Chemical grout will stop split , the Channel is closed .