West Point CEAC

AMTS at West Point

West Point CEAC West Point Military Academy is adding a Cyber & Engineering Academic Center as seen in this architect’s rendering. The start of construction involved blasting rock to make room for the new structure. GEO deployed 30 automated vibration monitors to monitor the effects of the blasting. Geophones were installed directly onto the structures…

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RVMs in Nevada

RVMs on sidewalk

RVMs Monitor Sheet Pile Installation Four of the six RVMs positioned along the sidewalk adjacent to the work zone. GEO’s rugged vibration monitor (RVM) are deployed at this site in Nevada to monitor vibrations from sheet pile installation. Unlike most other vibration monitors, RVMs can be installed in public locations. The lockable, heavy-weight steel enclosure has…

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Crossbay Bridge Upgrade

Laser displacement sensor on bridge pier

Crossbay Bridge Upgrade ProjectScheduled upgrades for this six-lane highway bridge include replacement of fender systems and improvement of scour protection. The bridge must remain open during construction. Monitoring RequirementsThe project will require vibration monitoring and stability monitoring. The photo above shows heavy stone mattresses being placed at the base of the piers for scour protection.…

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Tampa Airport

Prism at Tampa Airport

Tampa Airport Expansion ProjectTampa International Airport’s $2 billion expansion plan will allow the airport to serve a projected 34 million passengers per year, up from the current 21 million. Photo was taken from the tower.   Monitoring RequirementKeller is installing foundations for three new structures at the airport. Existing structures had to be monitored for…

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Ground Improvement

Monitoring ground improvement

Ground Improvement for Warehouse ProjectTo consolidate foundation soil for a large warehouse facility in California, Keller installed wick drains and followed up with deep dynamic compaction and surcharging. Monitoring Requirement Monitoring the progress of consolidation required easy access to continuous measurements of pore-pressure and settlement. ImplementationVibrating wire piezometers were installed across the site. Wireless logger…

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Seawall Repair

Monitoring vibration and noise at Seawall

Seawall Repair ProjectNaples, 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 RequirementDriving 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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Hollywood Utilities

Vibration monitoring in Hollywood

Utility Updates in Hollywood Monitoring RequirementVibration monitoring was required during utility work near the historic 1923 Hollywoodland entrance gate. ImplementationGEO supplied four automated RVM (rugged vibration monitors) for the project. The RVM features a heavy steel enclosure suitable for unprotected public areas and a built-in, shatter-proof solar panel to eliminate the need for AC power.

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Aqueduct Retrofit

Mokulumne Seismic Retrofit

Aqueduct Retrofit The ProjectThe Mokelumne Aqueduct, some 87 miles long, consists of three large-diameter pipes,constructed in 1929, 1949, and 1963. The aqueduct carries water from the Sierra Nevada foothills to the East Bay Area, providing nearly 80% of the area’s water supply. The RequirementThe aqueduct underwent a seismic retrofit of support bents, expansion joints, and…

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Metro Tunnel

Tunnel Monitoring

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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Merrimack Bridge

Merrimack Bridge Piers

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…

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