Gulf Foundation uses only hydraulic impact hammers for installing Vibro-Combi Piles. A noise-reducing shroud may be fitted. This practice ensures compliance with environmental requirements and prevents noise nuisance.
The Vibro-combi pile is a cast-in-situ displacement driven pile, produced using a steel casing. The steel casing with detachable base plate is set up at ground level. The casing is driven to depth. On reaching the correct level the inside of the tube is inspected to ensure it is dry and unsoiled. A precast pre-stressed concrete pile is suspended in the casing, which is then filled with grout (optionally only over the part in the bearing stratum) and sometimes with bentonite. Once the space between the casing and pile is filled, the steel casing is withdrawn by driving upwards or hammering out.