rail
Spokane River Bridge
Spokane River Bridge The BNSF Spokane River Bridge project involves construction of a new rail bridge adjacent to the existing bridge. Geo-Instruments is monitoring the existing bridge for potential impacts from the construction, which includes vibratory pile driving for a temporary pile-supported work trestle. GEO deployed three automated monitoring systems that separately report displacements, vibration,…
Read MoreTrack Monitoring – Chicago
Project Types ProjectsRecentSettlementExcavationsStructuresWalls & SlopesInfrastructureBridgesTunnelsRailVibrationDustConsolidationPiles Automated Track Monitoring – Chicago This AMTS system was used to monitor for potential settlement and lateral movement of twin rails during jack boring operations beneath the rail embankment. The project duration was 10 months. The AMTS was mounted on a tower for good sight lines to rail-clip prisms installed…
Read MoreTrack Monitoring Test
Projects ProjectsRecentSettlementExcavationsStructuresWalls & SlopesInfrastructureBridgesTunnelsRailVibrationDustConsolidationPiles Track Monitoring Comparison Test Shape array – red AMTS prisms – orange Tiltmeters – green In-Place Inclinometer – blue GEO-Instruments has posted a paper that discusses three track monitoring technologies. The three technologies are: AMTS, Shape Arrays, and Tiltmeters. Will there be a clear winner? AMTS (automated total stations) monitor the…
Read MoreCalifornia High Speed Rail
California High Speed Rail ProjectThe California High Speed Rail system will connect San Francisco to Los Angeles with trains traveling up to 220 mph on grade-separated track. (Rendering courtesy of California High Speed Rail Authority). GEO-Instruments is at work on a section of the project between Fresno and Bakersfield. The elevated tracks will be supported…
Read MoreCaltrain Tracks
Caltrain Tracks GEO’s AMTS is monitoring Caltrain track during adjacent construction. The dots of light are prisms installed on the track. Rail clip prisms are installed in pairs at 15-foot intervals along the track. This photo shows only the inside prisms. Pairs of road prisms at the road crossing. Monitoring prism pairs provides measurements of…
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 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…
Read MoreLight Rail & Utilities
Light Rail & Utilities Project GEO monitored Sound Transit assets and an SPU water line during ground improvement work on an adjacent property. Instrumentation Instrumentation included automated vibration monitors for the water line and an AMTS system to monitor the Sound Transit assets.
Read MoreTunnels & Structures
Tunnel Construction & Surface Points 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.
Read MoreMetro Tunnel
DC Metro Tunnel GEO’s deployed an automated monitoring system in a WMATA tunnel. The system included strain gages, convergence gauges, tiltmeters, vibration monitors, and AMTS. The AMTS and prisms are clearly visible in the photo on the right. Also visible is one of the eight vibration monitors and wall-mounted geophones.
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