projects
Storage Facility
Settlement of Storage Facility Project This tilt-up constructed storage facility experienced cracks, settlement, and movement of walls. Monitoring Requirement: Monitoring required 10 hydrostatic level cells to monitor settlements, and a node-and-gateway network consisting of 10 wireless tiltmeters to monitor any outward rotation of the walls and 3 crackmeters with wireless VW Nodes to monitor cracks…
Read MoreTerminal Expansion
Denver Airport Expansion Project Denver International Airport added 39 gates to the existing terminals, increasing capacity by 30%. Monitoring Requirement Existing structures were monitored for movement as excavation and construction takes place. GEO was contracted to monitor four structural columns on Terminal C, which was undergoing a 16-gate expansion. Implementation GEO-Instruments installed two L-bar prisms, one…
Read MoreStack Demolition
Stack Demolition The polar vortex event in January 2019 brought extreme fluctuations in temperatures that cracked the entire length of this 250 foot stack. The crack affected both the brick liner and the steel outer casing. The unstable stack had to be monitored before and during demolition. The monitoring solution involved placing survey prisms onto…
Read MoreHigh Rise Construction
High Rise Construction Project Winthrop Center in the financial district of Boston features a 691-foot tower offering mixed commercial and residential spaces. Challenges As with all city-center projects, the initial challenge was finding the best location for each AMTS and working with building owners to gain access. Site activities will bring other challenges: construction equipment…
Read MoreTrack & Tunnel
Track & Tunnel Project A CSO tunnel was constructed below active light-rail tracks. Monitoring for settlement was required for safe operation during the tunneling works. Monitoring Solution GEO’s solution was a tower-mounted, solar-powered AMTS monitoring system and rail clip prisms. The AMTS provided near-continuous monitoring and transmitted measurements to a GeoCloud website. Data, graphs, and alerts…
Read MoreChurch Renovation
Church Renovation GEO installed instrumentation to monitor the stability of the church structure during renovation work. An Automated total station (AMTS) monitored for any displacements of the walls. GeoCloud wireless tiltmeters were also installed at critical locations to monitor rotational displacements.
Read MoreSlope Monitoring
Slope Monitoring at Snoqualmie Pass Project Rockslides and snow avalanches at Snoqualmie pass have caused frequent closures of I-90, so State and Federal agencies embarked on an avalanche bypass project. Monitoring Requirements WSDOT needed instrumentation for steep slopes directly above a work area. GEO installed 22 instrumented rock dowels. An AMTS system was also installed.…
Read MoreAqueduct Retrofit
Aqueduct Retrofit The ProjectThe Mokelumne Aqueduct, some 87 miles long, consists of three large-diameter pipes,constructed in 1929, 1949, and 1963. The aqueduct carries water from the Sierra Nevada foothills to the East Bay Area, providing nearly 80% of the area’s water supply. The RequirementThe aqueduct underwent a seismic retrofit of support bents, expansion joints, and…
Read MoreSister Bars & O-Cell
Sister Bars & O-Cells GEO supplied and installed these sisterbar strain gauges to monitor an axial pile load test for large-bore piles. The strain measurements are used to calculate shaft load during O-cell testing. In a typical test, the O-cell is welded between upper and lower reinforcement cages. Gauges are attached to both. Careful preparation is required…
Read MoreLight Rail & Utilities
Light Rail & Utilities Project GEO monitored Sound Transit assets and an SPU water line during ground improvement work on an adjacent property. Instrumentation Instrumentation included automated vibration monitors for the water line and an AMTS system to monitor the Sound Transit assets.
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