Device for connecting ends of at least two grid supports used in tunnel construction has plates fixed between each pair of belt rods and bridged by a tie strap that fixes two grid supports together

摘要

The grid supports (4,5) have at least two adjacent longitudinal belt rods (8,9) per support and the device has a plate (14,15) fixed between each two belt rods. The plates are bridged by a tie strap (16) that fixes the two grid supports together. The grid supports each have the at least two belt rods on their upper sides.