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ACI - American Concrete Institute
ACI PRC-506.1-21: Fiber-Reinforced Shotcrete - Guide
ACI PRC-506.5-22: Specifying Underground Shotcrete - Guide
ACI PRC-533.5-20: Guide for Precast Concrete Tunnel Segments
ACI PRC-544.7 Report on Design and Construction of Fiber-Reinforced Precast Concrete Tunnel Segments
FHWA - Tunnels Webpage
Research Projects
Tunnel Library
Technical Manual for Design and Construction of Road Tunnels - Civil Elements
Underground Transportation Systems in Europe: Safety, Operations and Emergency Response
RocScience
RocScience - Software
Excavation Design Software
RocScience - Training
USACE - Rock Reinforcement Engineering and Design Manual
Champion Fiberglass - Subways and Tunnels
Eisenhower-Johnson Memorial Tunnel Construction Photos
History