Reply on topic: Switzerland's Gotthard Tunnel uses Trimble Equipment for higher accuracy and safety
https://tunneling.trimble.com/customer-story/tunneling-solutions-help-support-largest-tunnel-project-in-switzerlandTheoretical analysis of heat loss from ceiling jet in tunnel fires
A good tunnel safety paper. https://www.sciencedirect.com/science/article/abs/pii/S088677982100002X Sanetoshi Saito Yuki Yama...ikari-cho, Kokubunji-shi, Tokyo 185-8540, Japan https://www.sciencedirect.com/science/article/abs...Chennai Metro Phase II: L&T Deploys Third TBM Siruvani For Tunneling
This 6.65-meter earth pressure balance (EPB) machine marks the third of eight TBMs commencing tunneling activities on Line-3's Package TU-02, connecting Kellys and Taramani Road Junction stations. https://www.metrorailnews.in/chennai-metro-phase-ii-lt-deploys-third-tbm-siruvani-for-tunneling/
cover tunnel photo by: Matt Brown from London, England / CC BY
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