AMTS at the Wharf Project

The Wharf Project is a redevelopment of the waterfront to increase access and commerce to the area. GEO deployed two AMTS to monitor shoring for the excavation for two garages. WMATA tunnels run directly behind the shoring. GEO also monitored jet grouting operations and underpinning of a 108-inch DC Water outfall pipe at the site.

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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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Shape Array

California Technicians are reeling in an SAAscan, a shape array designed for repetitive use in a drilling environment. Drilling boreholes next to existing structures requires precision and accuracy. Using the SAAscan, the profile and position of the bore can be quickly realized on site. GEO’s proprietary software also provides the azimuth and deviation.

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GEO monitored a 32-foot deep excavation and a WMATA metro tunnel adjacent to the excavation in Washington DC. The SOE consists of drilled soldier piles braced with whalers and rakers. GEO’s technician can be seen on the wall. Monitoring prisms, a few visible in this photo, are mounted at the top of each pile around…

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South Portal Sound Wall

The East Link extension adds 14 miles and 10 stations to Sound Transit’s light rail system, carrying commuters between Bellevue and Seattle. This is a conceptual drawing of the south portal site, where the light rail enters the Bellevue Downtown Tunnel. This was the actual south portal site, cleared, graded, and ready for excavation. A…

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Excavation Support

The John F. Kennedy Center for the Performing Arts undertook an expansion project at its south end, adding three pavilions and a pedestrian bridge. The work involved demolition, excavation, and other construction activities that could affect the Kennedy Center, the Roosevelt Bridge ramp, and the underground DC water utilities. Early on in the project, GEO-Instruments…

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SQRBC Chicago

This satellite view showed the construction site for the Simpson Querrey Biomedical Research Center on Northwestern University’s Chicago Campus. The small blue dots were the locations of the AMTS systems used on the project. GEO supplied and configured the AMTS for Getec UK (now GEO-Instruments UK). The Google Street View rover captured the AMTS mounted…

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NYC West Side - Prisms

GEO-Instruments provided precise optical monitoring of the structures around the building in the foreground, which was torn down and replaced. The dots overlaying the photo show the locations of prisms, small optical devices that serve as remote targets for an automated total station. GEO’s technician configures the AMTS, which was located on the roof of a…

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China Town DC

GEO deployed an AMTS to monitor the stability of the buildings adjacent to this deep excavation in Washington DC’s historic Chinatown. Optical prisms were installed on the buildings and also on elements of the SOE. A change in the spatial coordinates of the prisms would indicate that movement had occurred. Every two hours, the solar-powered…

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Welding a Prism Bracket

Salesforce tower, the tallest building in San Francisco, is the centerpiece of the Transbay Redevelopment project. GEO monitored the support of excavation system. GEO deployed four AMTS systems and more than 138 prisms, such as the L-bar prism above, installed at critical locations on the support system.

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