- Port of Trieste
- Trieste, Italy
- PBA 612
For the installation of a Jetty foundation 139 open ended piles, 1810mm diameter have to be stabbed inside sea and has to be drilled.
The pile foundation design program called further for soil plug removal below the Insert pile succeeded by drilling of a pilot hole below the Insert Pile tip to a specified depth.
The job was executed by DDC with the Wirth PBA612/2000/200 hydraulically driven by a power pack.
The pilot hole is drilled with a flat bottom drill bit body with effective hole cutting 1220mm. The body is provided with a compressed air chamber for reversed air lift drilling.