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

Seattle, WA This tilt-up constructed storage facility experienced settlement and movement of walls. 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. Measurements were transmitted off site by cellular modems to GeoCloud…

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Denver International Airport This AMTS monitored four structural columns on DIA Terminal C as excavation for an expansion took place. Two L-bar prisms, one high and one low, were installed on each column.

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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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Expertise

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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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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Charlestown Navy Yard

GEO-Instruments installed and automated 10 crackmeters and a vibration monitor at the home of the USS Constitution. The instruments were needed to monitor the National Park Service police station while the seawall is reinforced by angled micropiles. Hourly readings were transmitted from the site to GEO’s web-based monitoring platform, which processed the readings and made…

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