山岳トンネル(5)

[VI-430] About the bonding strength of the initial age in the post grouting type rock bolt using the fast hardening expansion mortar

〇Atsuhiro Yui¹, Takahiro Yumoto¹ (1.Hazama Ando Corporation)

Keywords:rock bolts, post-grouting type lock bolts , fast-hardening mortar, pull-out test, pull-out strength