Soil & Rock Testing
Provided a variety of geotechnical rock and soil testing within one laboratory
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The Challenge
- Provide rapid testing during the construction of the tunnel
The proposed Baltimore Red Line is a 14.1-mile, east-west transit line connecting several areas of the city to downtown Baltimore. The Red Line would provide enhanced mobility and connecting service to Baltimore’s existing transit systems: MARC commuter service, metro, light rail, and local and commuter bus routes.
The Solution
GeoTesting Express (GTX) provided a wide range of rock and soil testing services in support of the design of two rock tunnels, the Downtown Tunnel and the Cooks Lane Tunnel. GTX performed over 1,600 rock tests and more than 500 soil tests for this project.
Rock tests included:
- Uniaxial compression
- Triaxial
- Cerchar abrasivity
- Punch penetration
- Petrographic analyses
- NTNU/SINTEF drillability
- Pulse velocities and elastic constant
- Direct shear
- Splitting tensile
- Point load
- Slake
- Rebound hammer
- Unit weight, porosity, and specific gravity
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