Sustainable Passive Houses: A Helical Pier Foundation for a Concrete Slab Raft

Type of Project

A helical pier foundation for a passive house’s concrete slab raft.

Location

Great Bardfield, Essex, England.

Challenges

• Very soft ground, requiring larger helix diameters to ensure stability.
• Heavy rainfall made the installation process more challenging.
• Selecting the right piles to support the structure on soft ground.
• Managing installation in difficult conditions after prolonged rainfall.
• Completing the installation within just 3 days despite site challenges.

Solution

The installation of 37 helical piles with an 18” helix for loads up to 75 kN, and double 16-18” helix for loads up to 100 kN. This is to reduce the amount of concrete used in order to keep the project as low-carbon as possible.

Results / Conclusion

• The project demonstrated our ability to provide a foundation solution in difficult ground conditions.
• The installation was fast and efficient while also staying on schedule.
• This sustainable project was supported and achieved by minimising the use of concrete while ensuring a strong and durable foundation.

Additional Information

Dealer: Techno Metal Post Home Counties