When a train accident occurs on the traditional railway network it's usually possible for emergency vehicles and recovery equipment to reach the incident location in the same way as a road accident. Now we've discovered that around half the HS2 line is buried in tunnels of one kind or another, we realise that any kind of train accident could present major difficulties in terms of rescue & recovery, then lengthy repair and line equipment checks before line reopening. I seem to remember great difficulties dealing with a vehicle fire in the channel tunnel - and a great many months passing before the route re-opened!
@TomTomicMic
3 ай бұрын
The channel tunnel is under the sea so that's a bigger risk factor!?!
@Carlos-im3hn
3 ай бұрын
the only "upside" is any event or accident will be "contained" (with a positive note). I have read about billions being devoted to emergency and escapeways for both tunnels and cross-tunnels, including expensive fan systems to vent smoke from fires. I have a question, is there anything unique to HS2 tunnels that make them more dangerous than any in UK subways, or EU/French subways ? Perhaps the amazing future high-speeds (> 200mph)? Personally I think underground trains and subways state-of-the-art has advanced sufficiently to remove many modern hazards, but maybe I am out of the loop ? I've studied Airworthiness in the past so maybe trains and subways are special in some way and want to learn more. For instance are commercial jet aircraft flying 500mph safer than trains at 200mph? There must be many pros/cons and tradeoffs in the mix for both jet aircraft vs. high-speed trains.
@soosajet3 ай бұрын
love these videos
@1chish3 ай бұрын
Go on admit it you SO wanted to fly through that tunnel! well i would have. This is going to just be landscape when its done and less intrusive than the old GCR. I suspect little noise will be heard above ground and that original narrow bridge will be a normal carriageway on land not a bridge. I think the people who stayed chose well.
@RitaFarrow3 ай бұрын
so they have to dig the earth where the red monster is,so nothing has really change,shame that u done not ask them questions or are they to shy,thanks 4 this
@Jamie922083 ай бұрын
It is meant tbe one long tunnel. I suspect that the wi dowsbetwwen the ladder rungs will be filled in and covered overl
@JohnLavender3 ай бұрын
Is that not going to be one long Tunnel rather thantwo short ones? That would seem to be logical.
@smudgycat67503 ай бұрын
Ah so this is the delay, lots of tunnels
@TomTomicMic
3 ай бұрын
......lots of tunnels, bridges and viaducts so hence the cost it's not vast plains of open land in the UK compared to China when they build their High Speed trains, who have little regard for the environment while we appear to have too much when it comes to trains, not so much for motorways, however!?!
@Carlos-im3hn
3 ай бұрын
@@TomTomicMic their HS2 planning probably also selected the minimum up/down movement of the train to allow for the most controlled at very-high speeds. I've read where they think this track and train segment could be running over 200 mph in the future, so would need to be flat grade as possible. This is amazing engineering.
@DavidKnowles0
3 ай бұрын
@@Carlos-im3hn It will top out at 225.
@timhanser1943
2 ай бұрын
225 mph , incredible. 😮 Birmingham will be a viable commuter city to London . Residential developments and regeneration will happen fast .
@peterlee26223 ай бұрын
I am surprised how short this "green tunnel" will be - and especially as the western side is actually what they call a "retained cutting". That's the bit that looks like a ladder from above. It's a cutting with retaining walls and the "ladder" is the bracing that holds them apart. Given that the remaining villagers are pretty close, I would think there will be considerable noise disturbance when the trains rush through. There seems to be pretty slow progress on site, but perhaps there are things going on that are not obvious from above...
@frasermitchell9183
3 ай бұрын
No, it will be all tunnel. The "ladder" you refer to will be roofed over, then the whole tunnel covered with earth and landscaped. The Kenilworth Greenway will run on top, but will pass under the replacement bridge for Cromwell Lane. The trains will run on resiliently-mounted track to minimise ground-borne noise.
@peterlee2622
3 ай бұрын
@@frasermitchell9183 I wonder where you have got that information? As far as I can find out, the green tunnel will be only 400m long which takes it some 100m or so beyond Cromwell Lane to the north west. Then comes the "retained cutting" which is not a tunnel as it is not enclosed on top. If you know otherwise, where is that information to be found?
@peterlee2622
3 ай бұрын
Ok, having looked at the video again, I concede that the "ladder section" visible may well be covered over to form that 100m section north west of Cromwell Lane. I think the retaining walls are just being constructed further out but probably will not have a "ladder" form as the walls will probably be strong enough to hold back the earthworks...
Пікірлер: 23
Excellent footage
nice details !
When a train accident occurs on the traditional railway network it's usually possible for emergency vehicles and recovery equipment to reach the incident location in the same way as a road accident. Now we've discovered that around half the HS2 line is buried in tunnels of one kind or another, we realise that any kind of train accident could present major difficulties in terms of rescue & recovery, then lengthy repair and line equipment checks before line reopening. I seem to remember great difficulties dealing with a vehicle fire in the channel tunnel - and a great many months passing before the route re-opened!
@TomTomicMic
3 ай бұрын
The channel tunnel is under the sea so that's a bigger risk factor!?!
@Carlos-im3hn
3 ай бұрын
the only "upside" is any event or accident will be "contained" (with a positive note). I have read about billions being devoted to emergency and escapeways for both tunnels and cross-tunnels, including expensive fan systems to vent smoke from fires. I have a question, is there anything unique to HS2 tunnels that make them more dangerous than any in UK subways, or EU/French subways ? Perhaps the amazing future high-speeds (> 200mph)? Personally I think underground trains and subways state-of-the-art has advanced sufficiently to remove many modern hazards, but maybe I am out of the loop ? I've studied Airworthiness in the past so maybe trains and subways are special in some way and want to learn more. For instance are commercial jet aircraft flying 500mph safer than trains at 200mph? There must be many pros/cons and tradeoffs in the mix for both jet aircraft vs. high-speed trains.
love these videos
Go on admit it you SO wanted to fly through that tunnel! well i would have. This is going to just be landscape when its done and less intrusive than the old GCR. I suspect little noise will be heard above ground and that original narrow bridge will be a normal carriageway on land not a bridge. I think the people who stayed chose well.
so they have to dig the earth where the red monster is,so nothing has really change,shame that u done not ask them questions or are they to shy,thanks 4 this
It is meant tbe one long tunnel. I suspect that the wi dowsbetwwen the ladder rungs will be filled in and covered overl
Is that not going to be one long Tunnel rather thantwo short ones? That would seem to be logical.
Ah so this is the delay, lots of tunnels
@TomTomicMic
3 ай бұрын
......lots of tunnels, bridges and viaducts so hence the cost it's not vast plains of open land in the UK compared to China when they build their High Speed trains, who have little regard for the environment while we appear to have too much when it comes to trains, not so much for motorways, however!?!
@Carlos-im3hn
3 ай бұрын
@@TomTomicMic their HS2 planning probably also selected the minimum up/down movement of the train to allow for the most controlled at very-high speeds. I've read where they think this track and train segment could be running over 200 mph in the future, so would need to be flat grade as possible. This is amazing engineering.
@DavidKnowles0
3 ай бұрын
@@Carlos-im3hn It will top out at 225.
@timhanser1943
2 ай бұрын
225 mph , incredible. 😮 Birmingham will be a viable commuter city to London . Residential developments and regeneration will happen fast .
I am surprised how short this "green tunnel" will be - and especially as the western side is actually what they call a "retained cutting". That's the bit that looks like a ladder from above. It's a cutting with retaining walls and the "ladder" is the bracing that holds them apart. Given that the remaining villagers are pretty close, I would think there will be considerable noise disturbance when the trains rush through. There seems to be pretty slow progress on site, but perhaps there are things going on that are not obvious from above...
@frasermitchell9183
3 ай бұрын
No, it will be all tunnel. The "ladder" you refer to will be roofed over, then the whole tunnel covered with earth and landscaped. The Kenilworth Greenway will run on top, but will pass under the replacement bridge for Cromwell Lane. The trains will run on resiliently-mounted track to minimise ground-borne noise.
@peterlee2622
3 ай бұрын
@@frasermitchell9183 I wonder where you have got that information? As far as I can find out, the green tunnel will be only 400m long which takes it some 100m or so beyond Cromwell Lane to the north west. Then comes the "retained cutting" which is not a tunnel as it is not enclosed on top. If you know otherwise, where is that information to be found?
@peterlee2622
3 ай бұрын
Ok, having looked at the video again, I concede that the "ladder section" visible may well be covered over to form that 100m section north west of Cromwell Lane. I think the retaining walls are just being constructed further out but probably will not have a "ladder" form as the walls will probably be strong enough to hold back the earthworks...
Why no commentary?
April fools ???