Track Monitoring – Chicago
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 on the tracks. The height…
Read More6th Street Viaduct
6th Street Viaduct GEO-Instruments worked with Skanska and Cowi during the construction of the new multi-arch 6th Street Viaduct in Los Angeles. The 3500-foot long viaduct crosses over 16 lanes of highway, 18 sets of railroad tracks, the LA river, parks, buildings, and sidestreets. The bridge deck was initially supported by formwork. After the arches…
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 MoreSOE in Seattle
Monitoring SOE in Seattle GEO-Instruments is monitoring the support of excavation system at 701 Dexter in Seattle. The deep excavation makes room for a 4-level underground parking garage that will be topped by a 10-story office building. At the start of the project, the 701 Dexter building was still standing. GEO used a drone to…
Read MoreCoastal Cliff Erosion
Projects ProjectsRecentSettlementExcavationsStructuresWalls & SlopesInfrastructureBridgesTunnelsRailVibrationDustConsolidationPiles Coastal Cliff Erosion Threatens Road Coastal erosion threatens the safety of a road leading to an industrial site. At this location, the cliff has advanced inland to within 20 feet of the road. A 600-foot horizontal shape array, piezometers, and vibration monitors were installed to provide continuous monitoring. The cliff has…
Read MoreCo-Located Instruments
News Archive Co-Located Tiltmeters & Prisms GEO-Instruments installed wireless tiltmeters and AMTS prisms to monitor repairs to a highway embankment supported by MSE walls. In some cases, the tiltmeters and AMTS survey prisms were co-located. The graphs above show close tracking of tiltmeter and prism measurements over a 3 month period. The red limit lines…
Read MoreWaterfront Tunnel Alexandria
Waterfront Tunnel – Alexandria Virginia The Herrenknecht TBM used by AlexRenew, Alexandria Virginia’s water treatment service. The TBM was named for Hazel Johnson, one of America’s leading pioneers for environmental justice. Hazel next to the launch shaft. After launching, Hazel proceeded to excavate the 2-mile long Waterfront Tunnel at an average depth of 100 feet.…
Read MoreMeet Carley Buford
News Archive Meet Carley Buford, PE Carley Burford joins GEO as the business development manager for the western US. Carley has a civil engineering degree from California Polytechnic State University with graduate work at UC Berkeley. After working as a geotechnical consultant in Boston for a few years, Carley returned to her home state of…
Read MoreNATJ Round Table
NATJ Tunnel Monitoring Round Table 2022 Click for PDF Monitoring and Instrumentation are experiencing wider usage and acceptance in tunneling,while also rapidly changing to integrate with the latest technology. In this year’s annual monitoring round table, NATJ spoke with experts Loic Galisson, VP USA and Canada for the Sixesense Grout; Angus Maxwell, Director and CEO…
Read MoreGKM Consultants
News Archive GKM Consultants Joins Keller North America Keller Acquires GKM ConsultantsKeller North America (Keller) is pleased to announce the acquisition of GKM Consultants Inc, an instrumentation and monitoring provider in Quebec, Canada, with over 15 years of experience. President of Keller North America Eric Drooff said, “GKM is an excellent addition to Keller. Working…
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