HELICAL MICROPILES
Combine the technology of helical piles with drilled micropiles
to yield the benefits of both products.
Certifications & partnerships
What are Helical micro Piles
Helical Micropiles have displacement devices added above the helices to create a void, which is subsequently filled with grout. The resulting pile has the end-bearing characteristics of a helical pile and the skin friction characteristics of a micropile.
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Technical specifications
Advantages of Helical Micropiles
End-bearing & Skin Friction
They provide the loading benefits of helical and micropiles in a single pile. If needed, these piles can also be installed with post grouting systems to increase their capacities even further.
Stiffer Response
When loaded, the pile provides a much stiffer response when compared to un-grouted helical piles and generally provide a reduced displacement during both initial loading and over time.
Buckling Resistance
The grout column provides increased buckling resistance for smaller diameter pipe piles and square shaft helical piles. In extremely poor soils this bucking resistance can be further increased through the addition of steel pipe sleeves over the grouted square bar piles.
Corrosion Resistance
The grout column provides added corrosion resistance in environments with harsh soil conditions, such as peats and coastal. When combined with galvanized piles, these systems are often designed to outlast the structures that are founded upon them.
There are significant benefits from a structural and design perspective
In Greater Vancouver they are often used where softer soils such as peat or clay are present on site over top of harder layer such as Till. These types of piles can also be used in situations where no hard bottom layer exists, in those cases the pile acts almost entirely with skin friction like a traditional micropile.
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Finance & Project Management Benefits
- No Spoils
Unlike traditional drilled piles, the displacement action of helical micropiles virtually eliminates spoils disposal and cleanup. This makes them ideal for indoor installations and contaminated sites.
Dealing with obstructions
Every site presents different challenges. TerraCana’s field experience and in-house engineering mean we’ve developed practical solutions for the ground conditions that stop other contractors.
Narrow Urban Site With Adjacent Structures at Risk
In Victoria, a developer needed to add a building expansion on a site bordered closely by neighbouring buildings, creating a very narrow work area where surrounding structures were in danger of damage. TerraCana used smaller equipment and grouted displacement piles installed to 55 feet, encasing the upper portion of the piles in PVC to prevent downdrag and protect the adjacent buildings throughout installation.
See it in action
Case studies
What loads can be carried by helical screw piles?
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Micro piles
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