BULT-IN TIMBERING ROOF TYPE TUNNEL METHOD

摘要

PURPOSE: A construction method of a roof type tunnel using a buried support material is provided to form a pipe roof with excellent supporting force by embedding steel timbering in the inner side of a steel tube. CONSTITUTION: A construction method of a roof type tunnel using a buried support material is as follows. A steel tube is inserted into a surface layer of a tunnel(S11). A cap for timbering is attached on the inner side of the inserted steel tube(S13). Mortar is placed inside the steel tube(S14). A cutout hole is formed in the steel tube by the cap. A steel timbering is inserted into the cutout hole(S16).