projects
Prado Dam Basin
Prodo Dam Basin Project The USACE enlarging the flood control basin and building a dike to enhance flood risk management at Prado Dam. The basin is designed to accomodate a 200-year event. Monitoring Requirement Engineers needed to monitor settlement, total pressure, and pore-water pressures. Implementation GEO installed a wireless, solar-powered logger, three settlement cells, an…
Read MoreMicrotunneling at LAX
Microtunneling at LAX Project The LAMP project at LAX in California is a multi-billion dollar program for modernizing access to and from the airport. One part of the project involved installation of 9,700 feet of 48-inch diameter earthquake-resistant pipe within the City of LA street rights of way. Cut and cover was used for most…
Read MoreGround 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…
Read MoreSeawall Repair
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…
Read MoreMiami Dust
Miami DustGEO deployed two automated dust monitors at this construction site in Miami, Florida. Why two? The contractor is responsible for controlling dust from the site, but there may be other sources of dust that are outside the contractor’s control. By deploying two monitors, one upwind and one downwind from site activities, it is possible…
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 MorePedestrian Bridge
Ballston Pedestrian Bridge The Project The redevelopment plan for Ballston Quarter, the commercial center of Arlington, Virginia, included a new pedestrian bridge, shown in a conceptual drawing above. The new bridge superstructure was fabricated off site, then transported to the location as shown above, and finally lifted onto prepared piers, as shown in the next…
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 MoreTIP Installation
Installing TIP Cables 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. The first part of the cage is lowered into the shaft. LTC…
Read MoreHollywood Utilities
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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