Working device or trailer for transporting material for tunnel construction has provision for discharging concrete and also has rails for smooth running of working device, whereby vehicle can use sidewise pathways to serve tunnel floor

摘要

The working device or trailers, which move on one or more drive ways out of center of tunnel led as far as possible. The trailer is movable freely on sliding surface in a large cross section. The device moves in the clearance to far reaching ends on rail tracks. The onward front tunnel part can be served independently of vehicle movement. The vehicle can use sidewise pathways to serve tunnel floor. The drives are placed laterally with the trailer, which moves on a pre-determined path. The outside drives are placed on the mobile ramp and are not a part of the working device.