Secant pile walls are retaining walls that are constructed by using a softer concrete pile overlapped by a harder reinforced concrete pile, resulting in a continuous, impervious, underground wall that can be excavated against if required.
Secant walls are used in situations where due to unfavourable ground conditions, a palisade/soldier pile wall or sheet pile wall is not sufficient, and a continuous pile wall is required.
The secant pile wall method provides an effective solution for the construction of deep excavations to form basements, cut and cover tunnels, tanks, etc.
- Slope stabilisation
- Support of excavations
- Basement construction
- Cut and cover tunnels
- Underground tanks
- Water retention or exclusion