Shield tunnel for floor slab, floor slab construction method of shield tunnel, and, shield tunneling method of construction

摘要

PROBLEM TO BE SOLVED: To provide a floor slab for a shield tunnel, which has superior structure and can be efficiently constructed.SOLUTION: A floor slab 200 comprises: a box culvert 200A which is installed at a central part in a width direction of a bottom part of the tunnel; and a pair of right and left concrete blocks 200B which are installed at both end parts in the width direction of the bottom part of the tunnel so as to sandwich the box culvert 200A. The concrete block 200B is divided into two portions of a lower member 203 and an upper member 204, and a face S2 at which the block 200B is divided is parallel. The concrete block 200B has a vertical face that faces a side wall part of the tunnel while having a void therebetween, and filling concrete 205 is cast in the void.