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…
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.
Read MoreStorage Facility
Settlement of Storage Facility Project This tilt-up constructed storage facility experienced cracks, settlement, and movement of walls. Monitoring Requirement: Monitoring required 10 hydrostatic level cells to monitor settlements, and a node-and-gateway network consisting of 10 wireless tiltmeters to monitor any outward rotation of the walls and 3 crackmeters with wireless VW Nodes to monitor cracks…
Read MoreTerminal Expansion
Denver Airport Expansion Project Denver International Airport added 39 gates to the existing terminals, increasing capacity by 30%. Monitoring Requirement Existing structures were monitored for movement as excavation and construction takes place. GEO was contracted to monitor four structural columns on Terminal C, which was undergoing a 16-gate expansion. Implementation GEO-Instruments installed two L-bar prisms, one…
Read More