Vancouver's skyline didn't just rise from the coastal plain—it had to contend with a geological legacy that makes every excavation a careful negotiation with the ground. From the redevelopment of the old Expo lands to the glass towers punching through the False Creek basin, the city sits on a mix of glacial till, marine silts, and sandy lenses deposited during the last ice age. You can't just dig and hope. The water table sits high, often just a couple of meters below street level, and the 2015 NBCC seismic requirements mean lateral earth pressures get calculated with a healthy dose of conservatism. Our team brings the instruments right to the edge of the cut, running continuous monitoring programs that track wall deflection, tieback loads, and groundwater drawdown in real time. When the excavation passes that critical depth—usually around the fourth level of underground parking downtown—the slope stability parameters established during the design phase need field validation, and that's where automated inclinometers and load cells prove their worth.
In Vancouver's glacially consolidated soils, a wall that doesn't move at all is often over-designed—but a wall that moves too much can trigger settlement claims across the street.
