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/