富水砂卵石地层注浆加固试验研究

Research of reinforcement simulation test on grouting for water-rich sandy gravel strata

通过自行研制的模拟饱水条件下注浆加固和堵水的试验装置进行单孔注浆试验,分析了注浆压力和浆液扩散规律,试验结果表明:注浆压力存在"脉冲"现象,孔隙水压力越大,"脉冲"现象越明显;凝胶注浆材料在地层中扩散分为两个阶段,地层中水压力越大,浆液扩散半径越小。

In this situation,an experiment device was developed to grout in sandy gravel strata with rich water for reinforcement and water plugging. Using the device,single hole grouting tests were directed,and got the rule of grouting pressure and diffusion radius. The experimental results show that the phenomenon of ＂pulse＂exists in the grouting process,and the greater the pore water pressure is,the more obvious the phenomenon of ＂pulse＂is,the diffusion of gel material includes two processes： the greater the water pressure is in the formation,the smaller the diffusion radius is.