Prism at Tampa Airport

Project Tampa International Airport’s $2 billion expansion plan will allow the airport to serve a projected 34 million passengers per year, up from the current 21 million. Rendering courtesy of Tampa International Airport.   Monitoring Requirement Keller is installing foundations for three new structures at the airport, including the central utility plant shown in the…

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Ballston Pedestrian Bridge

Project Overview The redevelopment plan for Ballston Quarter, the commercial center of Arlington, Virginia, included a new pedestrian bridge, shown in a conceptual drawing above. Using a technique called accelerated bridge construction, the new bridge superstructure, was prefabricated off site, transported to the location, and then lifted onto prepared piers. The superstructure weighed approximately 100…

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Hydrostatic Settlement Cells on warehouse wall

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, 10 GeoCloud tiltmeters to monitor any outward rotation of the walls, and 3 vibrating-wire crackmeters with GeoCloud VW Nodes to monitor cracks in the wall. Implementation All instruments were automated so that the…

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Project An expansion project at Denver International Airport will add 39 gates to the existing terminals, increasing capacity by 30%. Monitoring Requirement Existing structures must be monitored for movement as excavation and construction takes place. GEO was contracted to monitor four structural columns on Terminal C, which is undergoing a 16-gate expansion. Implementation GEO-Instruments installed…

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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 the steel…

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monitoring excavations

High Rise Construction, Boston Winthrop Center, currently under construction in the financial district of Boston, will feature a 691-foot tower offering mixed commercial and residential spaces. GEO-Instruments has deployed six optically-networked AMTS to monitor the structures abutting the site. Networking ensures that all measurements share the same coordinate system. Our GeoCloud services process the measurements…

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AMTS monitoring renovation of church interior

California As this church undergoes renovation, an AMTS is monitoring for any movement of the walls. GeoCloud wireless tiltmeters are also installed at critical locations.

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Monitoring for Construction Control - NYC Apple Store

New York City GEO monitored the controlled release of tension in a pretensioned steel structure as work proceeded on this retail store. Instruments include an AMTS system and vibrating wire strain gauges.

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Monitoring Structures above Tunnel

Baltimore, MD GEO monitored an existing train tunnel as work proceeded on a new sewer tunnel. The AMTS in the photo was monitoring surface points, while another AMTS was monitoring within the tunnel. Other instrumentation included shape arrays, piezometers, extensometers, and automated vibration monitors.

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Structural Stability

Michigan This AMTS, mounted on a foot bridge, is monitoring the stability of the building in the background during foundation improvements.

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