Hong Kong’s Vast $3.8 Billion Rain-tunnel Network

Hong Kong’s Vast $3.8 Billion Rain-tunnel Network

Below the mountains that overlook Hong Kong’s financial district, drainage engineer Alex Lau is ankle-deep in water flowing into a giant tunnel almost twice the height of a double-decker bus. Part of a ground-breaking, $3.8 billion (30 billion Hong Kong dollar)...
Advancements in Large Diameter TBM Tunneling

Advancements in Large Diameter TBM Tunneling

Over the past two decades soft ground and mixed face TBM tunnels have increased in diameter such that the term ‘large diameter TBM tunnel’ has become common usage. However, there is no actual definition of what constitutes ‘large.’ Therefore, in this article ‘large’...