METHOD OF SEAMING AND JOINING REINFORCED CAGE IN METHOD OF CAST-IN-PLACE CONCRETE LINING CONSTRUCTION OF TUNNEL

摘要

PURPOSE: To shorten a construction period of time by inserting a jointing male type barrel portion projected out to a rear end surface and having an outer peripheral surface to a jointing type female barrel portion projected out to the front end surface of a reinforcing bar cage and then fitting a taper roller of female type barrel portion to the locking hole. CONSTITUTION: A jointing female type barrel portion 9 is projected out on the front end surface of a ring-shaped reinforcing bar cage 8 of an existing lining concrete A, and a jointing taper roller 11 is fitted in a freely get-in and get-out manner to an attaching hole 10 of the barrel portion 9. Also, at the rear end surface of a reinforcing bar cage 8 for fitting, a jointing type male barrel portion 16 with a tapered tip is projected out and a linkage hole 17 is provided. And the barrel portion 16 of the cage 8 is fitted to the barrel portion 9 of concrete A, the roller 11 is fitted to the hole 17, and the cage 8 is connected to the cage 8 of concrete A. Thus, labor and time required for jointing work can be reduced and the term of works can be shortened.