Comment by Yeul 15 hours ago How did they build those deep tunnels before the invention of TBMs? It must have been slow going. 5 comments Yeul Reply WJW 15 hours ago Get some people down there with shovels and carts, same as any public works project earlier than ~1720. HPsquared 15 hours ago There was already a big coal mining industry so I assume they'd have used those techniques. Havoc 14 hours ago >How did they build those deep tunnels before the invention of TBMs?Same approach as TBMs just manual AF. Dig a bit, put in supporting structure. Rinse and repeat.They've been at it since 1890 though so that helps mshockwave 14 hours ago The scenario suitable for TBM is surprisingly limited so even nowadays many tunnels are still dig using the good’o way, mostly with explosives GeoAtreides 12 hours ago ??? explosives? in mud? (well, clay)?!tunnels are bored depending on the soil, length, diameter. Most projects I have seen use TBMs and the New Austrian Tunneling Method. Explosives are quite the minority (not many tunnels are in solid rock), even the Gotthard tunnels were dug with TBMs
WJW 15 hours ago Get some people down there with shovels and carts, same as any public works project earlier than ~1720.
HPsquared 15 hours ago There was already a big coal mining industry so I assume they'd have used those techniques.
Havoc 14 hours ago >How did they build those deep tunnels before the invention of TBMs?Same approach as TBMs just manual AF. Dig a bit, put in supporting structure. Rinse and repeat.They've been at it since 1890 though so that helps
mshockwave 14 hours ago The scenario suitable for TBM is surprisingly limited so even nowadays many tunnels are still dig using the good’o way, mostly with explosives GeoAtreides 12 hours ago ??? explosives? in mud? (well, clay)?!tunnels are bored depending on the soil, length, diameter. Most projects I have seen use TBMs and the New Austrian Tunneling Method. Explosives are quite the minority (not many tunnels are in solid rock), even the Gotthard tunnels were dug with TBMs
GeoAtreides 12 hours ago ??? explosives? in mud? (well, clay)?!tunnels are bored depending on the soil, length, diameter. Most projects I have seen use TBMs and the New Austrian Tunneling Method. Explosives are quite the minority (not many tunnels are in solid rock), even the Gotthard tunnels were dug with TBMs
Get some people down there with shovels and carts, same as any public works project earlier than ~1720.
There was already a big coal mining industry so I assume they'd have used those techniques.
>How did they build those deep tunnels before the invention of TBMs?
Same approach as TBMs just manual AF. Dig a bit, put in supporting structure. Rinse and repeat.
They've been at it since 1890 though so that helps
The scenario suitable for TBM is surprisingly limited so even nowadays many tunnels are still dig using the good’o way, mostly with explosives
??? explosives? in mud? (well, clay)?!
tunnels are bored depending on the soil, length, diameter. Most projects I have seen use TBMs and the New Austrian Tunneling Method. Explosives are quite the minority (not many tunnels are in solid rock), even the Gotthard tunnels were dug with TBMs