projects
Pedestrian Bridge
Ballston Pedestrian Bridge The Project The redevelopment plan for Ballston Quarter, the commercial center of Arlington, Virginia, included a new pedestrian bridge, shown in a conceptual drawing above. The new bridge superstructure was fabricated off site, then transported to the location as shown above, and finally lifted onto prepared piers, as shown in the next…
Read MoreMerchants Bridge
Merchants Bridge Renovation Project Overview TRAA Merchants Bridge is a rail bridge that crosses the Mississippi River between St Louis Missouri and Venice, Illinois. First opened in 1889, the bridge is owned by the Terminal Railroad Association. It services six Class 1 railroad companies and Amtrak. In 2018, work began on an extensive renovation of…
Read MoreTIP Installation
Installing TIP Cables Thermal integrity profiling can identify necking, bulging, cage eccentricities, pile shape, and variations in concrete cover. Above: TIP cables before installation. GEO technician completing the installation of TIP cables and sister bar strain gauges on a two-part, 40 foot cage. The first part of the cage is lowered into the shaft. LTC…
Read MoreHollywood Utilities
Utility Updates in Hollywood Monitoring RequirementVibration monitoring was required during utility work near the historic 1923 Hollywoodland entrance gate. ImplementationGEO supplied four automated RVM (rugged vibration monitors) for the project. The RVM features a heavy steel enclosure suitable for unprotected public areas and a built-in, shatter-proof solar panel to eliminate the need for AC power.
Read MoreStorage 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 MoreRenovation of a Skyscaper
Renovation of a Boston Skyscraper A crane on the roof of the building was used to remove the old pre-cast cladding and replace it with the new glass curtain, which can be seen at the bottom left. Strain gauges were welded to vertical structural elements. Wireless nodes transmitted measurements to the internet. Hydrostatic level cells…
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…
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