台山人当时带来了在岩石中开凿隧道的先进技术-他们先用火把岩石烧热, 冷却后岩石变得脆弱才开凿。
金门桥对面 Point Bonita Lighthouse 的隧道就是当年台山的包工头用此法提前完工开凿成的。
当然, 能用炸药的地段用炸药还是更有效率
https://en.wikipedia.org/wiki/Point_Bonita_Lighthouse
台山人当时带来了在岩石中开凿隧道的先进技术-他们先用火把岩石烧热, 冷却后岩石变得脆弱才开凿。
金门桥对面 Point Bonita Lighthouse 的隧道就是当年台山的包工头用此法提前完工开凿成的。
当然, 能用炸药的地段用炸药还是更有效率
https://en.wikipedia.org/wiki/Point_Bonita_Lighthouse
WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.
Copyright ©1998-2025 wenxuecity.com All rights reserved. Privacy Statement & Terms of Use & User Privacy Protection Policy