Construction method of the viaduct highway to use the drainage groove forming member and the drainage groove forming member of the viaduct highway

摘要

PROBLEM TO BE SOLVED: To provide a drain ditch forming member of an overpass expressway, capable of eliminating the need of opening a lid comprising a metal member with human power when performing cleaning, lowering a cleaning cost by keeping safety of a cleaning person, preventing durability from being damaged by not corroding a metal member inside a bridge pier, and smoothly draining drain water accumulated on a road surface of the expressway, and a construction method of the overpass expressway using the drain ditch forming member.;SOLUTION: A drain ditch forming member is provided with a drain channel space in the inside, is formed forming a roughly rectangular parallelepiped cylinder shape by a bottom wall, both sidewalls rising from a width direction of the bottom wall and an upper wall connecting distal ends of both sidewalls, and has a plurality of first reinforcing bars penetrated inside the bottom wall in the width direction, projected to the outer side respectively on the distal end side, and disposed at an interval in a bottom wall longitudinal direction, and the upper wall is provided with an oblong hole for drain water, which is penetrated in a vertical direction and communicated with the drain channel space.;COPYRIGHT: (C)2013,JPO&INPIT