Helical Piers Reinforce a Crane Support for Multi-Family Buildings

Description

An installation of 44 P4 helical piers underneath a concrete foundation to support a tower crane.  This crane will be used in the construction phase of three multi-family buildings.

Year

2025

Contracted Dealership

Techno Pieux Québec Est, Qc, Canada

Client

Construction Dinamo

Location Address

77 route du Président-Kennedy in Lévis, Qc, Canada

Engineering Firm

Iconex

General Contractor

Construction Dinamo

Project Goals

Install piers to support a concrete block foundation measuring 25.59 ft × 25.59 ft × 6.23 ft thick. This concrete foundation is being used to support a crane for the construction of three (3) multi-story residential towers (18 to 24 stories). The piers were required as a foundation support due to the low bearing capacity of the surrounding soil and the heavy loads being transferred by the crane and the concrete block.

Specific challenges

• Tight deadline
• Accessibility
• Limited workspace.

Our advantages compared to other installation methods

• Quick installation
• Efficient and timely coordination between the design engineer, the dealer and Techno Metal Posts' engineering department.

Soil type: Backfill, clay, and sand with low bearing capacity

Number of people on site: 2 (1 installer + 1 welder)

Piers used: Model P4

Equipment used: ET-1 installation machine

Load to be supported by pile (bearing capacity): Service load between 205 kN (compression) and 35 kN (tension)

Torque per pier: ± 14,700 lb-ft

Engineer's guidelines: Position certain piles at a slight angle (± 5 degrees) to ensure optimal pile layout and load transfer in both compression and tension.

Depth of embedment: ± 17.39 feet from the bottom of the excavation. The piers rest on the bedrock (shale).

Details of the structure resting on the piers: Concrete block measuring 25.59 ft × 25.59 ft × 6.23 ft thick.

External Links:

https://lefitz.ca/projet/

https://www.constructiondinamo.com/

https://www.iconex-ing.com/