In addition, a sloped soil nail wall would provide structural support for the upper excavation, while a sheet pile wall and ring beam shoring system would support the lower excavation.

The collapse of a shoring wall at a Coquitlam construction site didn't come to light until almost 24 hours after it happened.

Plans also called for a soil nail wall as well as a sheet pile wall and ring beam shoring system to support the caisson during excavation.