Geotechnical work for the East London Line extension from Dalston Junction station to New Cross Gate is due to finish on Easter Sunday.
Main contractor Balfour Beatty Carillion Joint Venture hired Bachy Soletanche to prepare the ground for 28 structures at 20 locations.
The geotechnical contractor has bored 3,650 piles, used 43,000m2 of concrete and grout, 3,050t of steel and 20 different drilling rigs to complete its work on the £1bn rail project.
Bachy installed piled foundations for four new stations, five maintenance facilities and operational buildings, eight bridges and two viaducts, plus several other geotechnical structures including embankments. Bachy is still on site at Surrey Quays station.