Drivecast™ Friction Pile for Deep Foundation Solutions
Construct a high capacity pile, simply by installing the Drivecast™ pile to the required depth while maintaining a cement grout reservoir at ground surface. Gravity will naturally pull down the grout into the space provided by the displacement assembly, creating a fully encased grouted pile.
- Efficient and predictable capacities
- Higher production than auger-cast piles
- The sectional design allows for limited access/low overhead areas
- No vibrations or spoils
How It Works
The CHANCE® Drivecast™ Screw Displacement Pile utilizes soil displacement methodology which allows the pile to be advanced into the soil by rotation. Pile sections are comprised of a centralized steel shaft and a patented displacement assembly placed at regular intervals from the pile tip. By design, the pile establishes a cylindrical void which allows a column of grout to be immediately pulled down from a gravity-fed reservoir, creating a fully grouted, high capacity pile.
Designed for projects where increasing capacity and providing predictable results is a must, the CHANCE Drivecast pile is fully grouted, resisting corrosion in aggressive soils and high-water tables.
As a proven engineered system, bearing and side resistance is combined to bring a large diameter solution to a wide variety of applications for new construction, heavy highway, tanks/sewer, pipelines, and commercial/industrial buildings. Perfect for limited access sites or areas with low overhead clearance, this sectional, screw-in pile provides added capacity with eﬃcient, predictable results.
Drivecast™ pile sections are engaged and advanced into the soil in a smooth, continuous manner at a rate of rotation of 5 to 20 RPM’s. Extensions are installed so required depths can be achieved, while sufficiently applying down pressure to uniformly advance each of the sections. Sections are connected by using coupling bolts and nuts, torqued to 40 ft-lbs. The rate of rotation and magnitude of down pressure is adjusted for different soil conditions and depths.
The grout is released from a gravity-fed reservoir located at the surface, prior to the advancement of the lead section into the soil and is continued until the minimum column length is achieved.
A rotary type, hydraulic power-driven torque motor should be utilized, along with a Kelly bar adapter and square shaft (SS) or round shaft (RS) drive tool. It is recommended that a torque indicator be used to measure torque and can be an integral part of the installation equipment or externally mounted in-line with the installation tooling.
Drivecast™ piles are offered both as uncoated or hot-dip galvanized per ASTM A153 or A123. The fully grouted column itself provides one level of corrosion protection. If soil conditions, service life, or code requirements warrant additional protection, then hot dipped galvanization provides a second level of protection. Hot dipped galvanization is the only practical means to provide a corrosion-resistant coating capable of withstanding the rigours of installation.