Secant Piles
This technique involves the formation on site of concrete or grout piles by removing soil through a recoverable bush. A piling wall is formed by touching (tangent) or intersecting (secant) piles which were executed in a specific order.
Tangent piles are only earth-retaining. Secant piles are both earth- and water-retaining. With secant piling walls, normally only one pile in two is reinforced.
References
BRUGES (Scheepsdale bridge)
Client: Depret
Execution: 2010
Besides the 483 secant piles with a diameter of 610 mm and a length of 15,5 m, we also executed: 108 foundation piles, 176 soil mix piles and 47 anchor blocks.
ANTWERPEN (Total Fina)
Client: Strabag
Execution: 2009
68 metres run of secant piles with a diameter of 63 cm and a length of 12.5 m.
Tilleur
Client: Galler
Execution: 2009
A total of 9 round secant pile pits with diameters ranging from 5.13 to 9.5 m.