Monitoring Railroad Tracks

Project The 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 by large-bore piles.…

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Monitoring vibration and noise at Seawall

Project Naples, a neighborhood of Long Beach, California, is built on three islands protected by seawalls. A project to refurbish the seawalls involved driving the steel sheet piles seen above. Monitoring Requirement Driving sheet piles generates noise and vibration. To protect adjacent properties from excessive vibrations and to protect people from excessive noise, the contractor…

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Monitoring Piles - TIP Thermal Wires in Cage

Thermal integrity profiling can identify necking, bulging, cage eccentricities, pile shape, and variations in concrete cover. Above: TIP cables before installation. GEO technician completing the installation of TIP cables and sister bar strain gauges on a two-part, 40 foot cage that will be tested with a bi-directional load cell from LTC. The first part of…

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Sister Bars for Pile Test

Las Vegas GEO supplied and installed these sisterbar strain gauges to monitor an axial pile load test for large-bore piles. The strain measurements are used to calculate shaft load during O-cell testing. In a typical test, the O-cell is welded between upper and lower reinforcement cages. Gauges are attached to both. Careful preparation is required during installation…

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