projects
M-Street Excavation
M-Street Excavation & Tunnel GEO monitored a 32-foot deep excavation and a WMATA metro tunnel adjacent to the excavation in Washington DC. The SOE consisted 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, were mounted at the top…
Read MoreBellevue Tunnel Portal
Bellevue Tunnel Portal 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…
Read MoreMerrimack Bridge
Merrimack Bridge MassDOT rehabilitated the Merrimack River Bridge, strengthening the superstructure and mitigating scour around the bridge piers. GEO placed an automated total station (AMTS) on the nearby Comeau bridge to monitor the stability of the piers of the Merrimack bridge. The AMTS measures angles and distances to prisms installed on the piers and transmitted…
Read MoreKennedy Center
Kennedy Center Expansion 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…
Read MoreSimpson Querrey Center
Simpson Querrey Center 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…
Read MoreCharlestown Navy Yard
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. The instrumentation was fully automated, transmitting hourly readings to GEO’s web-based monitoring platform, which processed…
Read MoreNYC West Side Demolition
NYC West Side Demolition 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…
Read MoreChinatown DC
Chinatown DC Excavation 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…
Read MoreSales Force Tower
Sales Force Tower 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.
Read MoreElliot Bay Seawall
Elliot Bay Seawall Project Monitoring construction of Elliot Bay Seawall. Instrumentation This multi-year automated monitoring project included SAA shape arrays, tiltmeters, load cells, solar-charged, wireless loggers, and web-based reporting.
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