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Contractors World  - UK & Ireland
2014 Vol 4 No 1

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Record-breaking continuous underwater concrete pour

  Artistic impression of the completed bridge

The international company, Professional Concrete Pumping (formerly Pochins), has been highly praised for its role in the concrete pour for the Forth Replacement Crossing South Tower, believed to be the largest continuous underwater concrete pour in the world.

The record-breaking pour, also believed to be the third largest concrete pour of any type, took more than 15 days to complete. A total 16,869 m³ of concrete was poured in 364 hours.

[Main Picture] Barge carrying the various concrete pumps and tremie pipes for delivery into the caisson. On board is a Liebherr LR-1160 crawler crane with a 52 m main jib and a small auxiliary jib

[Picture right: Artistic impression of the completed bridge.


Praising Professional Concrete Pumping’s role in the ambitious project, Christian Niemietz, Head of the Forth Crossing Bridge Constructors (FCBC) Caisson Operation, said: “The South Tower continuous concrete pour was a significant logistical challenge. Everything went extremely well and Professional Concrete Pumping did an excellent job.”

The concrete was transported to the South Tower caisson by four barges dispatched from the FCBC’s batching plant in nearby Rosyth Docks. The barges made 273 individual journeys to and from the site, negotiating a busy waterway (the Firth of Forth) and covering a total distance of 1,800 kilometres - the approximate distance from John O’Groats to Land’s End.

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