PRECAST CONCRETE BRACKET FOR VENTILATION DUCT SLAB FOR TUNNEL SLAB AND CONSTRUCTION METHOD USING THE SAME

摘要

It is related to a precast bracket for mounting a tunnel wind tunnel slab and a tunnel construction method using the same, while installing the bracket in a precast manner in mounting the tunnel wind tunnel slab to the ceiling of the lining concrete. The precast bracket for mounting the tunnel wind tunnel slab is a block body, so that a portion in contact with the lining bracket is formed as a vertical side (V), but the vertical side (V) secures a space connected to the arm steel mounting bracket of the lining bracket. In order to form a block-out portion, a PC bracket in which the steel mounting fixture is fixed by a fixing bolt inside the block-out portion; And the vertical side (V) corresponding to the vertical side (V) of the PC bracket 110 to act as a support portion of the tunnel wind tunnel slab (B) together with the PC bracket is formed integrally during the construction of the lining concrete (A), On the vertical side (V), the female steel mounting bracket is fixed to the lining bracket by a fixing bolt, so that the male steel mounting bracket of the PC bracket is inserted downward from the upper to the female steel mounting bracket of the lining bracket and the lining bracket and the PC. The bottom surface of the tunnel wind tunnel slab (B) is supported on a continuous upper surface of the bracket.