A Brief History of GRIP Piles
The GRIP Pile was introduced in 2007 by Screwfast Ltd., as a rock drill technique for applications that were not ideal for helical piles. For example, helical piles don’t penetrate sandstone well, but GRIP Piles can be used in this and other difficult types of consistencies and rock.
The GRIP Pile was originally developed as a new type of micropile. A rod is encased in grout and contained within steel CHS, known as a “sheer tube.” The sheer tube is installed first, and a hollow bar with a sacrificial bit is drilled inside the tube. Grout is then pumped through the sacrificial drill bit, is pushed outside of the bar, and creates a strong foundation.
GRIP piles can be used under buildings, for foundation repair, for anchoring wind turbines, and for road and railway structures.
Less Excavation, Less of a Carbon Imprint
- There’s no need for heavy digging; piles and grillage carry the weight as opposed to massive concrete blocks
- Foundations are ready within 5 days for loading, nearly three weeks faster than concrete bored piling.
- Requires no piling platform
- Road barriers stay in place due to long arm machinery and installation methods.
Adaption and Response Time of GRIP Piles
If unexpected ground is broken and helical piles are no longer appropriate, there’s no need for the project to be delayed. The solution is GRIP piles. This occurred during a contract for the East and West Carriageways of the M62. Sandstone was discovered, and the helical pile was no longer a viable option.
The benefit of using GRIP piles instead of a concrete foundation is that this can acted on and reorganised that same day. In this case, a realisation and phone call at 3am was responded to and reorganised to have work for Grip Piles begun that night. Switching to a concrete foundation would have meant postponement by a couple of weeks.
Overall, GRIP Piles are a greener and neater solution than concrete foundations, and can work in soil conditions that aren’t amenable to helical piling. For more information about GRIP piles or other foundation options, contact us here.