Incident Investigation: Worker Pulled Into Ground by Quicksand Condition | WorkSafeBC

This video recreates an incident in British Columbia where a worker at a sewer construction site was pulled down and trapped in the ground when a quicksand condition developed under his feet.

Using animation and photos from the worksite, this incident investigation slide show describes the factors and work processes that led to this incident. It can be used as a tool for health and safety training in excavation and construction.

Read the incident investigation report summary at https://www.worksafebc.com/en/resourc....

Timestamps:
0:00 Intro to quicksand condition
0:11 Plans for lift station upgrades
0:30 Geotechnical reports
1:30 Inadequate data from boreholes
1:50 Dewatering & shoring using an open steel caisson instead of an open-cut to full depth
2:20 Dewatering system – three other elements
2:55 Day of the incident – worker pulled into quicksand condition
4:11 What led to the incident?
4:51 Potential mechanisms causing quicksand condition

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