Landing bridge null for tunnel construction

摘要

PROBLEM TO BE SOLVED: To improve work environment and work efficiency. SOLUTION: In a landing bridge for tunnel construction work which allows a vehicle for carrying out earth and sand to pass and ensures a work space 24 for placing concrete in a digged tunnel lower part 20, a crawler 14 moving a base 10 in the forward, backward, right, and left directions is mounted on a front, rear, and lower part of the base 10, a dust collection machine 16 is mounted in an upper part of the base 10, a form 18 for placing concrete is suspended in a lower part of the base 10 so as to lift and lower freely or a scraper 32 leveling an upper face of banking provided on a surface on which concrete is placed is mounted, and concrete 22 is placed in the tunnel lower part 20 digged through the form 18 for placing concrete.