Study on engineering technologies in the Mizunami Underground Research Laboratory; Development of design and construction planning and countermeasure technologies

Mikake, Shinichiro ; Sato, Toshinori  ; Aoyagi, Yoshiaki

The study on engineering technology in the Mizunami Underground Research Laboratory (MIU) project consists of (1) development of design and construction planning technologies, (2) development of construction technology, (3) development of countermeasure technology, (4) development of technology for security, and (5) the development of technologies for restoration and reduction of excavation damages. This reports summarized the knowledge obtained about seismic movement characteristics at deep underground and the discussions held on the grouting method as parts of the development of design and construction planning technologies, in addition, the examination held on the plug used for the Reflood test in the GL-500m Access/Research Gallery-North as a part of the development of technologies for restoration and reduction of excavation damages.