projects
Charlestown 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.
Read MoreRosslyn Metro Station
Rosslyn Metro Station Project Overview Construction of twin residential and commercial towers adjacent to the Rosslyn metro station involved demolition of an entire block of existing buildings, blasting and excavation for deep foundations, and finally the construction of the towers. The station, ventilation shafts at each end of the station, a long escalator, and three…
Read MoreFDR Drive
FDR Drive Reconstruction Project Overview Significant deterioration of the pilings supporting this busy six-lane parkway threatened its stability. Because the highway carries over 150,000 vehicles daily, it had to remain open to traffic during reconstruction. To manage the risk, highway engineers contracted GEO-Instruments to implement a monitoring system with early-warning alarms. Enclosure for data Logger…
Read MoreTransbay Transit Center
Transbay Transit Center Project Overview Construction of the Transbay Transit Center required a massive support of excavation system that included a cement-deep-soil-mixed perimeter wall, four levels of cross-lot bracing, and two levels of tiebacks. Monitoring Requirements To minimize risk, project owners wanted continuous monitoring of some 250 points within the excavation area, including points on…
Read MoreMTA East Side Access
MTA East Side Access Project Overview New York’s East Side Access project is designed to bring the Long Island Rail Road from Queens to Grand Central Terminal in Manhattan. Because the project involves tunneling under high value real estate, designers specified that the route be closely monitored for possible settlements. Monitoring Challenges The selected locations…
Read MoreHernando de Soto Bridge
Hernando de Soto Bridge Project Overview The Hernando de Soto bridge, first opened in 1973, carries I-40 traffic across the Mississippi river. During a seismic retrofit, sudden settlement of a pier supporting an approach bridge, forced temporary closure. The pier had settled 5 inches in three days. After evaluating the failure, engineers revised construction methods…
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