Coastal Gaslink Spread 8 – Shoring/Pile Installation

Ledcor Foundations and Ledcor Pipeline collaborated on this “One Ledcor” project to provide critical foundations and shoring solutions. The work supported pipeline installation between a segment that feeds the LNG Canada Plant.

The project site featured unstable glaciomarine clay and a lower dike area with highly saturated ground. Because these conditions prevent conventional pipeline installation, the team implemented specialized shoring and piling strategies:

• Glaciomarine Clay Areas: Sheet piles were designed and installed to shore the trench, allowing for safe excavation at shallow depths.
• Lower Dike Area: Shoring was utilized to manage groundwater, limiting it to manageable volumes in saturated conditions. 
• Main Line Block Valve 17: The team completed driven pipe piling for this valve station, installing 36 pipe piles with diameters ranging from 10 to 20 inches and reaching depths of up to 45 m (148 ft)

On this project, 3.5 km (2 mi) of sheet pile trench was installed and removed, including installation through five active water crossings. The project also included the installation and removal of eight bore pit locations (16 pits total) using deep shoring techniques.

The project reached completion in December 2022.