In challenging and variable geotechnical conditions, Bermingham Foundation Solutions was hired to design and install a 6m wide, 5m deep & 400m long sheet pile shoring trench to facilitate major utility relocation activities along Leslie St. in downtown Toronto along with pile diving driving +1,000 pipe piles at the base of excavation and drilling 1.0mɸ caissons to support future overhead streetcar poles/cables.
- Design/supply/install/removal of sheet pile shoring trench for major utility relocation
- Shoring trench dimensioned at 400m long, 5m deep, 9m wide with upper level of bracing to allow installation of continuous precast storm culverts and RCP installation
- Supply and installation of foundation piles to support new utility structure.
- Drilling 80 units of 0.914mɸ x 7m caisson foundations to support overhead catenary system for new public transit system.
- 4 working crews & supervisors making up ~20 workers (pile driving crew x 2, weld crew, drilling crew).
- Open ended pipe piles. 75 units of 9-5/8” diameter x 0.325” wt x 45’ long and 800 units of 9-5/8” diameter x 0.545” wt x 45’ long.
- 725 cold rolled sheet pile pairs installed with vibrator hammer. Average length 55’ and typical section Z-75
- Sheet pile duration lasted approximately 8 months spaced according to construction staging
- Pipe pile installation work equivalent to 6 months spaced according to construction staging as well
- Soil conditions vary a great deal from each end of this jobsite from clayey and organic soils at the north end of the jobsite (very susceptible to disturbance) through sandy silt to silt layer at the south end. The project specifications included strict vibration and settlement requirements as well requiring the shoring system to be preloaded
- Pile driving rig with VTL System– 165 Ton crawler crane, B32 Diesel Hammer
- Pile driving rig with VTL System – 70 Ton crawler crane, B21 Diesel Hammer
- Pile driving rig with Hanging Lead System – 70 Ton crawler crane, B21 Diesel Hammer
- 110 Ton Crawler Crane - HPSI 500 vibrator hammer for 55’ long sheet pile installation
- 100 Ton Crawler Crane - HPSI 500 vibrator hammer for 55’ long sheet pile installation