ROCK BOLT WITH COMPRESSIBLE SPACER AND TUNNEL SUPPORTING METHOD USING THE SAME

摘要

PURPOSE: A bolt using a compressible spacer and a tunnel supporting method using the same are provided to minimize damage to grout and to uniformly fill grout between a bolt and a borehole. CONSTITUTION: A tunnel supporting device(100) comprises a bolt(120) and a compressible spacer(140). The bolt is formed in a cylindrical shape and has a first diameter(R2). A hole(HOL) is formed in the compressible spacer and has the same diameter as the bolt. The compressible spacer comprises a cylindrical support(SPT) and has a second diameter(R1).