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DIP Techniques | Grouted Annulus for Skin Friction Piles

A simultaneous driving and grout injection method.

The starter pile piece is fitted with an oversized conical grout shoe, which is open upwards, but tapered downwards.

As the pile is driven the grout shoe creates
a void or annulus around the shaft of the pile.

Grout is pumped through the drive shank
of the hammer and down into the core of
the pile.

The grout is then forced out through the grout shoe and fills the annulus created,
as the pile is driven.

The grout displaces air and water
and stabilises the compacted walls
of the annulus.

As the grout cures it forms a cohesive bond between the pile and the surrounding ground, maximising the skin friction
and minimising the pile lengths required
to meet the engineering design loads.

Once cured, the grout eliminates contact between the ductile iron and oxygen/water in the ground and provides long-term corrosion protection.


Welcome to the DIP revolution!
Welcome to the DIP revolution! We invite you to review our presentation and discover this innovative, flexible, and cost effective foundation technology.
Huge Cost Savings with DIP
CMS has proven 
that DIP provides huge potential cost savings of up to 70% of the value 
of traditional precast or steel encased concrete piling.
DIP Capability and Environmental Impact
Ductile iron Piles can be driven at angles up to 45°, exponentially expanding the range of pile uses. They produce minimal ground disturbance even in close proximity to existing structures.
DIP Engineering
The Plug&Drive© DIP pile system's precision engineering consists of self locking joints,
 built for durability, consistency, strength and ease of installation.
Mobility and Adaptability
The Plug&Drive© DIP pile system's mobility and adaptability is due to compact,
 lightweight equipment and a comprehensive array of well designed accessories.
Dry Driven for Skin Friction Piles
Dry Driven for Skin Friction Piles is a technique is used with deep soft soil 
where it is impractical to find firm bedrock.
Dry Driven for End Bearing Piles
End Bearing Ductile Iron Piles are ‘Dry Driven’ into the ground until they reach practical refusal. Fast and cost effective to install in areas of bedrock or very dense, cohesive strata.
Grouted Annulus for Skin Friction Piles
Grouted Annulus for Skin Friction Piles is a simultaneous driving and grout injection method to install DIPs, creating skin friction and corrosion protection.

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