Vanterm Berth 6 Extension | Vancouver, BC

Summary:
The design of choice by the Vancouver Port Authority for anchoring marine piling to resist seismic tension forces is the drilling of centralized anchors beneath the base of the pipe pile.
Date:
April 2002
Client:
Vancouver Port Authority
MarinePile001.jpg

First Canada Place Pier Extension used 9” F casing to 150’ depth x single anchor DCP tendon. Vanterm berth extension required the use of 10” F casing and reverse circulation drilling technique in order to advance the drill holes to 250’ depth. Later, the drilling technique was quickly modified once it was found that the tills directly beneath the pipe piles had large pockets of hydraulic sands under 150’ of hydraulic pressure.

A new drilling system from Finland directed the high pressure air to the center of the hole rather than hydro fracturing the sands and allowed the drilling to proceed with an external water head to counteract the incoming sands.

Scope Of Work

Anchored Steel Pipe Piles: 37 Each x 36” F x ~200’
Design Load: 480 Kips = 2,135 kN
Tip Type: Closed end—concrete plug
Anchor Type/Length: #18 DCP Grade 75 x ~250’
Drill Hole Diameter x Batter: 10.5” x 1:3