Connection structure of tunnel support and construction method of tunnel support

摘要

PROBLEM TO BE SOLVED: To provide a connection structure of a tunnel support and a construction method of the tunnel support, which enables the connection of a pair of split support works to be performed easily, efficiently and with high accuracy. SOLUTION: This is a connecting structure 100 of a tunnel support in which an arc-shaped first split support 10 and a first joint plate 15 and a second joint plate 25 of the second split support 20 are connected, and the second joint plate. A through hole 27 is provided in 25, a male member 30 to be inserted through the through hole 27 is projected from the first joint plate 15, the male member 30 is provided with an accommodating groove 34, and the accommodating groove 34 is provided in a side opening 35. A pair of claws 40 are arranged in the accommodating groove 34 so as to be freely moved in and out of the accommodating groove 34 through the side opening 35, and the end portion of the pair of claws 40 on the base side is urged by the elastic material 50. The male member 30 is inserted into the through hole 27, the wide surfaces of the first joint plate 15 and the second joint plate 25 are in contact with each other, and the end portions of the pair of claws 40 are brought into contact with each other. It engages with or faces the wide surface 26 of the second joint plate 25. [Selection diagram] FIG. 8