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Report No.

Grouting methodology in crystalline rock

Nobuto, Jun*; Kobayashi, Shinji*; Nishigaki, Makoto*; Mikake, Shinichiro ; Sato, Toshinori 

Authors are conducting research on construction technologies such as water sealing measures as a scientific and technological basis for geological disposal. In this paper, the application patterns of grouting technology to excavation work in deep underground are selected first, and potential grouting material for each pattern is summarized. Next, the method to achieve high level water tightness in crystalline rock with suspension grout like cement and bentonite slurry is studied. Finally, focusing on pre-excavation grouting for horizontal tunnels, the effective injection method is studied.



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