Underground line IV. C1 — side cofferdams for retracting the tubes of the underground on the Troja and Holešovice sides - Zakládání staveb, a. s.

Underground line IV. C1 — side cofferdams for retracting the tubes of the underground on the Troja and Holešovice sides


Underground line IV. C1 — side cofferdams for retracting the tubes of the underground on the Troja and Holešovice sides

The side cofferdams were closing the construction pit for the cut-and-cover tunnels on the Holešovice side and the dry dock on the Troja side to protect them against the river. On the Troja side, the separating wall between the dry dock and the Vltava River was carried out as a combination of diaphragm walls and sheet piles set into a pre-excavated trench filled with clay--cement slurry. It was mainly to the fact that the dry dock was used at this stage for concreting both underground line tubes and the sheet pile separating wall had to be dismountable; after the first tube retraction to the place it was reassembled. At the similar way as a Troja coffer-dam Holesovice coffer-dam was solved to.The side cofferdams were hardened both by external fills and by inclined braces and struts.

Measures

Embankment of the levee, excavation, backfills: 12 879 m3
Diaphragm wall – thickness of 60 cm: 2267 m2
Cut-off wall – thickness of 60 cm + AZ 26 + J/c: 586 m2
Temporary 2-strand anchors: 144 m
Temporary 6-strand anchors: 455 m
Steel struts: 75 t
Sheet piles of the wings: 368 m2
Fitting of sheet piles into the concrete: 261 m2
Demolition and cutting of sheet piles
Penetration of cofferdams, reassembly of sheet piles, sealing
Micropiles 108/16 and 70/12: 180

Client

Metrostav Co., Koželužská 2246, Praha 8-Libeň

Investor

Dopravní podnik hlavního města Prahy, a. s.,
Sokolovská 217/42, Praha 9

Price

Year

1,49 mil. EUR 2001–2004
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  • Type of construction : Traffic projects
  • Country : Czech Republic
  • Financial volume : 50–100 mil. Kč
  • Completion date : 2001-2005
  • Supporting technologies : Diaphragm walls,Anchors

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Zakládání staveb, a. s.,
Dobronická č.p. 1371
148 26 Praha 4

 

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Zakládání staveb, a. s.
K Jezu 1, P. S. 21
143 01 Praha 4 - Modřany

ID Number: 49241567
Tax ID Number: CZ49241567

Company registered in the Commercial Register at the Municipal Court in Prague, Section B, Insert 2139.

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