Bauer has announced that its subsidiary Bauer Technologie has completed additional ground engineering work for the Russian building that is set to become the highest building in Europe.
Bauer undertook piling work for the main structure of St Petersburg’s 462m tall Lakhta Tower in 2013 but has just completed a further 1,449 piles and 870m diaphragm wall for an adjoining office complex.
The company has also undertaken the basement excavation work for the new Lakhta Centre office building.
According to Bauer, the ground conditions were challenging with granite boulders of up to 2m in diameter encountered frequently in the soft silts and clays of alluvial deposits at the site. At depth this material gave way to an extremely hard clay stone that extended to a depth of up to 100m below the site.
Bauer first started working on the Lakhta Tower development in 2013 with the foundations for the main structure and podium. The company installed 260 bored piles with a diameter of 2m to depths of 85m for the main tower. Over 1,000 piles with diameters of 620mm and 1,180mm were constructed for the podium.
The height of the tower will set a new record in Europe, but the building’s foundations have already set a world record for the largest continuous concrete pour at 19,624m3, which was 3,000m3 more than the previous record set by the Wilshire Grand Tower in Los Angeles, US which was completed last year.
Construction of the tower is expected to be completed this year.