Tunnel formwork carriage for the cut – and – cover method. Tunnel formwork carriage when using mining techniques. Height adjustments and gridless assembly variants for a wide range of tunnel cross sections. The lifting and lowering device allows the tunnel formwork to be hydraulically lifted into the concreting position and then subsequently lowered.
In National Project of Mehr e Mandegar of Tehran- Tabriz Railroad Tunnel, in consideration of the 20- kilometer length of the one- way walls of the tunnel (in CUT AND COVER METHOD of Tunnel Construction), BFS Industrial Group succeeded to design, manufacture and erect 4 Upright One- way Tunnel Wall Lining Formwork Systems with the height of 7.6 m and the length of 12.6 m in each part of concrete work on a fluid basis (with bearer chassis) in the mouth/ opening with the width of 11.1 m. Each formwork in this project, in consideration of the simplicity of application in design of this formwork and high speed of fixation of the same, had an efficiency of implementation of each part in 24 hours, as the length of 12.6 m for each formwork instrument, which was registered in this project, as a record, in comparison with two to three weeks period of similar implementation in 12.6 m length by the application of modular system formworks.