TUNNEL LINING CONCRETE CONSTRUCTION METHOD AND TUNNEL LINING CONCRETE CONSTRUCTION STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a tunnel lining concrete construction method and a tunnel lining concrete construction structure in which the required covering of a rebar can be ensured sufficiently.;SOLUTION: A tunnel lining concrete construction method has a spacer mounting step of mounting a spacer 52 supported on a stage 2 to a rebar 51 in a rebar assembly process. Also, in a center installation process, a rebar network 5 formed in the rebar assembly process is disposed to a placement area 10 by that the spacer 52 is supported by an outer surface 32s of a center 3 for forming the placement area 10. Accordingly, the rebar 51 is positioned from the outer surface 32s side of the center 3 by the spacer 52. Accordingly, the concrete C placed in the placement area 10 formed by an inner wall surface 1s of a tunnel 1 and the outer surface 32s of the center 3 can sufficiently ensure the required covering of the rebar 51 by the spacer 52.;SELECTED DRAWING: Figure 3;COPYRIGHT: (C)2017,JPO&INPIT