Bôrik Tunnel, fire-fighting water main 1st and 2nd stage


Národná diaľničná spoločnosť, a.s., Bratislava

Construction period

December 2008 – August 2009

Construction technology:
Fire main I. stage: – deals with own water-service pipe for the tunnel
Fire main II. stage: – deals with branching of fire main in fitting shaft at the west portal into every tunnel tube

Executed works 1st stage:

  • earth works
  • laying of water pipeline from ductile iron DN 200 in open cut area
  • laying and assembly of fittings, adapting pipes
  • bed, backfilling

Executed works 2nd stage:

  • pipeline connection to the structure of the 1st stage of the fire-fighting water main
  • construction of fitting shaft at West portal
  • construction of fitting shaft at East portal, fire-fighting water main discharging
  • laying of water pipe line from ductile iron DN 150 in tunnel
  • equipage of fire – fighting niches with fittings, valves and hydrants
  • fire – fighting water main PUR insulation in tunnel tubes
  • fire niches lighting
  • earthing of hydrants and fire-fighting water main