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瑞浪超深地層研究所におけるグラウト技術の開発及び高度化(委託研究)

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

延藤 遵*; 見掛 信一郎 

Nobuto, Jun*; Mikake, Shinichiro

坑道掘削時に遭遇する水みちに対する止水を目的としたグラウト技術の研究開発を行った。具体的な項目としては、(1)止水性能に着目したグラウト注入方法の整理,(2)高圧注入時の浸透性能確認試験方法の検討,(3)より微小な亀裂に浸透可能なグラウト材料の調査、を実施した。

In this study, the comprehensive performance of suspension type grouting materials to seal rock fractures encountered in excavation works at deep underground has been checked, and the clogging phenomenon at the entrance of rock fractures has been investigated. Research issues are as follows; Study on grouting concept to secure high-level water sealing, study on the test method to check grout clogging under high injection pressure, study on grouting material which can penetrate into finer fractures. Among these, in the study on penetrability test method, prototype test instruments were made and a series of preliminary tests were conducted.

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