There
was a time when tunnelling formworks were designed and fabricated in jobbing
shops close to site. However, with the rock excavation and support process
taking less time, installation of the concrete lining becomes a far more significant
factor in the cost/time equation. This has led to more sophisticated design
of formworks with easier set-up, accurate positioning, and higher mobility.
As a result, it is not nowadays unusual to see tunnels with 12 m-long formworks
advancing twice each day. To achieve this realm of productivity, specialist
manufacturers have emerged, and these are the companies that are powering
the process.
RSB
Schalungstechnik -
design and manufacture of concrete formworks
CIFA –
providing formwork to sprayed concrete