The properties and requriments of pressure grouting fluid are introduced.

Due to the large quantity of fly ash added could effectively reduce the cost of the grouting slurry,the grouting slurry with a quality and quantity ratio of the cement,fly ash,clay,quicklime and sodium sulfate with the water content as 1∶0.

Design and application of new anti-aqueous dispersions and anti-aqueous solubility two-shot grouting material;

Workability and gelling performance of new two-shot grouting material with anti-aqueous dispersion and anti-aqueous solubility;

Traditional cement-sodium-silicate two-shot grouting materials was widely applied to filling, soil stabilization, strengthening and mitigation of water ingress to underground facilities due to its characteristics of rapid and adjustable gel-time and good working performance etc.

Application of double liquid grouting technology to strengthening bridge pile foundation on existing Guang-Shen line;

This article introduces deep foundation pit emergency repair of a high-rise building of Tianjin,using rigid fast-hardening water-stopping material on its negative side and double liquid grouting material on its positive side.

Combined with the construction in the section of water gushing at the entrance of Zhoucangling tunnel,the author introduces that man can achieve the expected effect of water gushing control with the method combining long borehold detection,lead small conduit pre-support with double liquid grouting,which solve the problem of water gushing in tunnel.

The bi-slurry grouting method is referred to drilling hole at water seepage area at the water blocking curtain to find out seepage channel then grout the mixture of water glass solution and cement slurry into the channel.

According to the features of underground karst and collapsible soil holes, the triple-pipe high pressure jet grouting and double-mortar grouting methods are adopted to consolidate the foundation of the site, so the hidden danger of safety has been eliminated.