Bellevue Tunnel Piezometers

Wireless Logger - in street installation for Piezometer

Bellevue Tunnel Piezometers

GEO engineer sets a wireless datalogger to transmit hourly readings of a piezometer. Automation improves safety for technicians and eliminates traffic disruptions.

Piezometers were installed along the tunnel alignment collocated with observation wells and inclinometers at 10 locations. All were automated with dataloggers and wireless communications. Readings were displayed on a dedicated website.

Groundwater levels did not fluctuate much in the dense till, but some instruments detected draining of perched water by probe drilling ahead of the excavation.