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Old November 4th, 2011, 03:01 PM   #361
bongo-anders
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So its more expensive in most cases to have 2 tunnels but its more practical and a little bit more safe.
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Old November 4th, 2011, 05:28 PM   #362
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There are several reasons for choosing monotube or twin tube tunnel. But the three main ones are the geology, availability of tunneling and maximum speed. On the geology of Madrid and Barcelona, ​​speed and availability of machinery the option of a single tube was the best.

It is also important to remember that these tunnels are not high speed. The speed will be limited to run between two stations very close. And security is guaranteed by the emergency exits.
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Old November 4th, 2011, 06:37 PM   #363
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You are also fogetting the fact of the emergency exits.

In a urban tunnel you could build as many exits directly to the surface as you want, while in a mountain or a sea tunnel the only way to make a emergency exit is to the other tube.

The expensive or not expensive question is a little more difficult, it depens on a lot of things... the Toulouse undeground has twin-tube sections between monotube sections.
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Old November 5th, 2011, 12:26 AM   #364
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Quote:
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ok fine...didn't know about scandinavian metros
Well, many metros use separate tubes. All Russia and CIS (= ex-soviet) metros are separate-tube type, for example.
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Old November 5th, 2011, 01:02 AM   #365
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Originally Posted by XAN_ View Post
Well, many metros use separate tubes. All Russia and CIS (= ex-soviet) metros are separate-tube type, for example.
In networks like that, usually once you have a construction system is easier to mantain it, due to the reuse of the construction equipament and techniques.
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Old November 5th, 2011, 05:14 AM   #366
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Well, many metros use separate tubes. All Russia and CIS (= ex-soviet) metros are separate-tube type, for example.
Some TBM circumference are so large that it can fit two metro tubes so they actually create a divider between the two lane. This is to insulate noise and wind moving from one lane to the other which becomes annoying to the passenger.



Another types are these that bore two tunnels at once.

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Old November 12th, 2011, 02:08 PM   #367
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Riding from Málaga..

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Old November 12th, 2011, 05:50 PM   #368
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thanks Mare nostrum

new talgo AVRIL´s video



passenger rail equipment for high speed intercity service.
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Old November 14th, 2011, 01:53 AM   #369
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Riding from Málaga..

great video!
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Old November 14th, 2011, 04:31 PM   #370
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AVE - High speed trains in the desert

Recorded at the high speed rail Madrid - Barcelona (province of Zaragoza).



Superb!
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Old November 16th, 2011, 01:24 AM   #371
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Fantastic!
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Old November 16th, 2011, 11:45 PM   #372
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Wow is this true?

I heard that they are planning for a bullet train service to the Airport (Madrid Barajas) in addition to the existing airport rail link of the Madrid Metro

Wow that would be awesome if it's true
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Old November 17th, 2011, 12:34 AM   #373
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No, We are building it
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Old November 17th, 2011, 03:59 AM   #374
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Old November 18th, 2011, 01:42 AM   #375
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Quote:
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Wow is this true?

I heard that they are planning for a bullet train service to the Airport (Madrid Barajas) in addition to the existing airport rail link of the Madrid Metro
The AVE high speed trains will use the recently opened Cercanías C1 (commuter) tracks to access the Airport.

I don't see the point, the AVE users can already take a Cercanías from Chamartín railway station to the T4 in just 10 minutes, and with the same AVE ticket. Plus, there is also the metro line 8...

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Old November 18th, 2011, 06:45 PM   #376
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Quote:
Originally Posted by Blackraven View Post
Wow is this true?

I heard that they are planning for a bullet train service to the Airport (Madrid Barajas) in addition to the existing airport rail link of the Madrid Metro

Wow that would be awesome if it's true

Yeah... as Ramiro II said, it is true, but it will be more in order to confort (avoid transfer with suitcases) than speed (they will be as fast as commuter trains only in that strech).

Madrid-Barajas has four terminals. Underground line 8 goes to Terminal 2 (and possibility to go to 1 and 3 just walking) and Terminal 4.
Train goes only to Terminal 4.

There are not a lot of possibilities to have many trains there. We will see some high speed trains but not all. Anyway, from Chamartin or Atocha you can shuttle to a commuter train with the same speed there.
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Old November 21st, 2011, 06:16 PM   #377
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Quote:
Originally Posted by solchante View Post
thanks Mare nostrum

new talgo AVRIL´s video



passenger rail equipment for high speed intercity service.
Is that train going to be manufactured in Spain?
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Old November 21st, 2011, 07:11 PM   #378
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It is.

But Talgo has the habit to manufacture their trains in combination with the purchaser company, because this way it's easier to sell them, so if any foreign company buys them they could be half-made in another country.
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Old November 21st, 2011, 11:05 PM   #379
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It is great that it is produced in Spain I know that Talgo does not always manufacture the trains it designs and that is why I asked. Furthermore its facilities in Las Matas and Alava (near Miranda de Ebro but I cannot remember the name) do not look so large. And yet they can produce such a great machine.
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Old November 21st, 2011, 11:23 PM   #380
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But it is not exactly creating a dessing to be made by others. Talgo trains are always made by Talgo, but usually a part of them are made by Talgo in the purchaser company depots by the purchaser company staff. In the case of Renfe, series 102 and 112 where partially made at Integria (Renfe's manufacturing division) in Los Prados (Málaga).
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