Construction method of tunnel curve for shield tunneling method

摘要

Problem to be solved: to provide a construction method of a tunnel curve portion for preventing the rolling of a shield tunneling machine when a curved portion of a tunnel is constructed using a tapered hexagonal segment.Solution: a long side junction part J1 of a hexagonal segment SG having a V-shaped inclined junction J2 formed on the opposite sides of a long side junction part J1 which is formed to be opposed to each other in a plane view and tapered in plan view, and a V-shaped inclined junction J2 projecting from both sides of the long side junction part J1 is assembled in a staggered manner toward the front and rear of the excavation hole Construction of tunnel curved section in shield tunneling method to build a curved section of tunnelThe edge of the lining B made of a tapered hexagonal segment SG, which is assembled in an annular shape, is pressed against each other by the same pushing force by all the propulsion jacks 9b of the shield tunneling machine.Diagram