Regional Connector
Instrumentation & Monitoring

Reduce risk to general public and building owners during construction activity

Sensor data allowed construction activity to progress continuously without delays

Ability for contractor and owner to immediately assess performance effects during construction

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The Challenge

Project involves constructing 1.9-mile underground light-rail system with three new stations
Creating direct connections between Azusa, Long Beach, East LA, and Santa Monica

LA Metro awarded the $1.4 billion contract to the Regional Corridor Constructors (RCC Team – led by the Skanska/Traylor JV) to build the L.A. Regional Connector Transit Corridor, a 1.9-mile underground light-rail system connecting the Metro Gold Line to the 7th Street/ Metro Center Station. It included three new stations, all cut-and-cover braced excavations. It creates a direct connection between Azusa and Long Beach and between East Los Angeles and Santa Monica.

The Solution

Geocomp’s contract included instrumentation and monitoring for over one mile of twin bored tunnel and three cut-and-cover/station excavations using our iSiteCentral® GIS web-based software to provide continuous, real-time assessment of construction-related activity to help the contractor control excavation/tunneling work and to mitigate risk of unexpected movement to adjacent buildings and utilities.

Geocomp’s iSiteCentral® integrated data from more than 3,000 sensors, including automated MPBXs, inclinometers, strain gages, load cells, tilt meters, settlement monitoring points, and performance data from the contractor’s TBM. Remotely positioned data collection systems were placed along the full length of the 1.9 mile transit line. Data was then transmitted wirelessly to the database.