Development and enhancement of grouting technologies in the Mizunami Underground Research Laboratory, 2 (Contract research)

Nobuto, Jun*; Mikake, Shinichiro 

Research items are as follows: study on viscosity of high viscous grouting material, study of clogging phenomenon of suspension type grouting materials under high injection pressure, literature review on infiltration characteristics of grouting materials to point out research issues to be solved and summary of this research works to date. Among these, in high-pressure clogging test, prototype test equipment developed last year was improved completely to simulate grout flow accurately in actual grouting scene.