Tunnels

Nondestructive testing data are used to assess the following liner and behind the liner conditions:

• Liner Condition and Integreity
• Behind Liner Conditions
• Liner Reinforcing Characteristics
• Soil and Bedrock Moduli values for Tunnel Design
• Behind Liner Void indentification

Sonic/ultrasonic velocity and resonant period data are used to determine liner concrete strength, thickness and identify areas of voiding, cracking, delamination and deterioration. Radar data identify areas of water concentration at the back of or within the liner, voided and grouted areas as well as an assessment of reinforcing spacing and cover.

NDT Corporation Projects:

• Port of Miami Tunnel - Geotech Data for Feasibility Study
• Lower Baker Dam Tunnel, Behind Liner Condition - WA
• Brooklyn Battery Vehicle Tunnel - New York, NY
• Cross Harbor Vehicle Tunnel - Hong Kong
• Atlantic Avenue Subway Tunnel - MTA Station - New York, NY
• Baltimore MTA Tunnel Metal Liner Thickness - Baltimore, MD
• WMATA "G" Line Subway Tunnel - Washington, DC
• Dewey Square Vehicle Tunnel - Boston, MA
• 19-Mile Brick-Lined Tunnel New Croton Aqueduct - New Croton, NY
• Locate Stone-Lined Tunnel Millbury Conduit - Millbury, MA
• Elkwood Wood-Lined Vehicle Tunnel - Elkwood, OR
• Allegheny Brick-Lined Rail Tunnel - Allegheny, PA
• Wise 7 & 8 Water Conveyance Tunnel - Wise, CA
• MBTA Concrete Subway Transit Tunnel - MA