Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
Vancouver Railroad Tunnel
Directory
References
Discover
Saguaro cacti dot the Sonoran Desert landscape at Saguaro National Park, Arizona. Formerly Saguaro National Monument cactus
Can You Drink Water from a Cactus?
NBA Lakers Celtics Finals Kevin Garnett shooting.
10 Great Sports Rivalries
Christmas tree, holiday, pine
How Did the Tradition of Christmas Trees Start?
Eye. Eyelash. Eyeball. Vision.
7 Vestigial Features of the Human Body
Black widow spider
9 of the World’s Deadliest Spiders
Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.
10 Famous Artworks by Leonardo da Vinci
Nativity Scene, Adoration of the Magi, Church of the Birth of the Virgin Mary, Montenegro
Why Is Christmas in December?

Vancouver Railroad Tunnel

Canada

Learn about this topic in these articles:

shotcrete in tunnel construction

  • railroad tunnel
    In tunnels and underground excavations: Shotcrete

    …developed in 1967 on the Vancouver Railroad Tunnel, with a cross section 20 by 29 feet high and a length of two miles. Here an initial two- to four-inch coat proved so successful in stabilizing hard, blocky shale and in preventing raveling in friable (crumbly) conglomerate and sandstone that the…

    Read More