Pre-grouting to reduce water inflow into the Mizunami Underground Research Laboratory

Hara, Masato; Kuji, Masayoshi; Minamide, Masashi; Mikake, Shinichiro ; Sato, Toshinori  ; Ikeda, Koki

In the Mizunami Underground Research Laboratory, water inflow into the shafts is disturbing the project progress. As a countermeasure for this problem, pre-grouting is being considered and pre-grouting has been undertaken in the shafts. This report describes an outline of the work results of pre-grouting.