A helical displacement pile is a reinforced concrete pile, which is used in construction and geotechnical engineering. Soil is displaced radially as well as vertically as the tooling is screwed into the ground. No spoils are generated while creating the cavity for the pile. The Helical tooling delivers the pipe to the depth required for the specified capacity. It is then retracted while the void is filled with concrete. The helical tooling forms a helical spiral in the soil for the concrete and rebar. This increases the frictional capacity while reducing the amount of concrete needed. Helical displacement piles are well suited to loose granular soils
Helical Displacement Piles are excellent in new construction applications for various types of buildings, including residential, commercial, and industrial structures. The Helical Displacement Piles support the structure, especially in weak, loose or granular soil areas. Helical Displacement Piles are beneficial in areas where the water table is high because they minimize groundwater disturbance compared to bored piles, which require dewatering. Installing these piles helps compact and improve the surrounding soil, increasing its load-bearing capacity. In urban environments, where noise and vibration need to be kept to a minimum, displacement piles are preferred as they are less disruptive than driven piles. Helical Displacement Piles are an advantage in places where environmental impact needs to be minimized, as they reduce the amount of soil excavation and disposal. The effectiveness and suitability of these pile types depend on various factors, including soil conditions, load requirements, environmental considerations, and project-specific constraints. Engineering judgment and detailed geotechnical investigations are essential in selecting each project's appropriate pile type and design.
Helical displacement piles unique helical design means the outside diameter is used for capacity calculation and reduces the amount of concrete required by up to 30%
No Engineered Pad
Compared to other deep foundation systems, the equipment needed to install helical displacement piles is lighter and takes up a smaller footprint and does not require an engineered pad.
Environmentally Sensitive Areas
In places where environmental impact needs to be minimized, displacement piles are advantageous as they reduce the amount of soil excavation and disposal, and cause less disturbance to the site
High Groundwater Applications
High groundwater does not impact installation or capacity of helical displacement piles. The formed in-place construction makes them an excellent choice in high groundwater conditions.
The key advantage of Helical Displacement Piles, is they generate no spoils and they compact the surrounding soil as they are installed. Leading to a denser and more stable soil structure around the pile, improving load-bearing capacity.
BUILD ON Approach
At EBS, we have a passion for construction. We live for the challenges associated with today's construction environment. Sites with poor soils, redevelopment of sites, limited access, and adjacent structures. Our team includes structural and geotechnical engineers you can work alongside to design or re-design for the most effective solution for your project.
We blend proven technologies and techniques to push projects forward, sometimes in novel combinations.
Our experienced field staff work closely with our in-house engineering team to develop solutions to site challenges.
Our experience lets us quickly evaluate your project and outline solutions, options, suggestions and budget pricing.
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HELICAL DISPLACEMENT PILE INSTALLATION
A key feature of the Helical Displacement Pile system is its helical, screw-like drilling tool. This tool drills into the ground while displacing soil laterally, similar to the action of a screw. This method reduces soil disturbance and eliminates extra spoils. As the pile is installed, the surrounding soil is compacted, increasing its density and load-bearing capacity. This makes the Helical Displacement Pile system particularly effective in loose or granular soils.
When design depth is reached, the rebar cage is dropped into the hollow shaft of the helical tooling dislodging the sacrificial tip preparing the way for the concrete.
Concrete is pumped down the shaft and into the void created as the tooling is retracted. This forms the helical ribs of the displacement pile. This unique design increases frictional capacity and reduces the amount of concrete needed up to 30%.
The completed Helical Displacement Pile is ready for termination in the pile cape or grade beam
Helical Displacement PileS
Capacities from 1000 kN to 3000 kN
Tight access/low headroom
Can be installed in close proximity to existing structures
Engineered pad not required
HELICAL DISPLACEMENT PILE TERMINATION
Rebar is set into the concrete of the Helical Displacement Pile to tie the pile into the gradebeam or pile cap as specified.
HELICAL DISPLACEMENT PILE COMPONENTS
The cast iron tip leads the charge as the tooling screws the pile down to the designed depth. It's job is to maintain the cavity until the depth is reached. The rebar cage is then dropped in ejecting the tip in preparation for the concrete.
The rebar reenforcing cage is dropped into the cavity before the concrete is poured. Its position is maintained by the tooling shaft to keep it centralized as the concrete is added.
The tip of the helical displacement pile tooling has helical flights that delivers the pile to the specified depth and creates the formed cavity that will be filled with concrete and rebar.