Reconstruction of high-pressure gas pipeline DN 500 in the Nové Mlýny Waterworks - Zakládání staveb, a. s.

Reconstruction of high-pressure gas pipeline DN 500 in the Nové Mlýny Waterworks


Reconstruction of high-pressure gas pipeline DN 500 in the Nové Mlýny Waterworks

Serious damages were detected on the DN 500 gas pipelines in sections between Velké Němčice–Dolní Dunajovice and Strachotín–Dolní Dunajovice where the pipeline passes under the bottom of the Nové Mlýny II. Waterworks. Necessary repairs had to be carried out by cutting out and replacing the pipeline in the da- maged places. Such complicated procedures realised under the water level had not been proven before. All places with damaged pipeline were secured with sheet pile cofferdams and repaired in the secured environment. Shorter sides of the cofferdams, where the pipelines went through, were designed as double and sealed off with jet grouted columns. All works including the pipeline repairs were carried out from pontoons.

Amounts and dimensions

Cofferdams built from sheet piles VL 604: 2123 m2
Sealing with jet grouted columns Ø 1200 mm: 180 m
Steel strut structures: 32 t
Excavation of cofferdams: 2088 m3

Dredging of the waterway: 11 252 m3
Backfill: 1658 m3

 

 

 

 

 

 

 

 

Client

Metrostav, a. s., Koželužská 2246, Prague 8

Investor

NET4GAS, s. r. o., Na Hřebenech II 1718/8, Prague 4

Price

Year

1,08 mil. EUR (no VAT) 2011



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  • Type of construction : Industrial projects
  • Country : Czech Republic
  • Financial volume : 10–50 mil. Kč
  • Completion date : 2011-2015
  • Supporting technologies : Driving

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Zakládání staveb, a. s.
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