Driven cast in-situ piles

Driven cast in-situ piles piles are produced by driving a casing with a detachable base plate into the soil. Depending on the application, a rebar cage is suspended inside the tube after the casing has been driven to the desired depth. Next, a measured quantity of concrete is poured or pumped into the casing. Following this, the casing is withdrawn by means of driving or vibrating. Where applicable, a short rebar cage can also be pressed into the concrete afterwards.

Application

The piles are used mainly as foundation for offices and high-rise buildings. Depending on the casing diameter and the reinforcement used, the piles are capable of absorbing high compression loads.

Ambient factors

The installation of driven cast in-situ piles piles comes with noise and vibration nuisance. The casing and hammer can be fitted with noise-reducing facilities. Because of the use of a steel casing, the installation of the piles is not sensitive to layered soil. It is important to pay attention to the centre-to-centre distance of the piles to prevent compaction and uplift due to pile driving.

Pros and Cons

Changing local conditions can be coped with by varying the type and length of the reinforcement during the execution.
Depending on the reinforcement and the casing diameter, the piles are capable of absorbing high compression loads.
In case of soil layers with high waterpressure, problems may arise that could compromise the quality of the piles and special attention to he concrete mixture may be neccessary.
As with all driven piles, installation comes with some extent of noise and vibrations.

Applicated

Name of project	Client
Groningen, Eemshaven mastfundaties	Elja Beton- en Waterbouw
Rotterdam-Maasvlakte, Quay walls Maasvlakte 2	Comb. Van Hattum en Blankevoort / BAM Civiel
Krimpen aan den \|Ijssel, Hollandia hall 11	Van Hattum en Blankevoort
Den Haag, Noise barriers A12	Holland Scherm