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Old October 27th, 2012, 06:08 AM   #381
Silver Swordsman
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Does anyone have any pictures of construction?
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Old October 27th, 2012, 01:28 PM   #383
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Yamanashi


http://userdisk.webry.biglobe.ne.jp/...9416318918.jpg

around station

http://userdisk.webry.biglobe.ne.jp/...7313130020.jpg


http://userdisk.webry.biglobe.ne.jp/...7413215707.jpg

map




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Old October 27th, 2012, 02:17 PM   #384
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The whole track will be covered with the tube?
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Old October 27th, 2012, 03:34 PM   #385
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Wow, great updates and great question.
How far off is it from being completed.
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Old October 27th, 2012, 04:11 PM   #386
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Quote:
Originally Posted by Equario View Post
The whole track will be covered with the tube?
A scene is amazing veiw of Kofu basin.
in spring, everything change to pink.
I also surprised at this tube.
I hate tube Shinkansen if so
I think it is only places with the danger that something will fall.

Last edited by castermaild55; October 27th, 2012 at 04:16 PM.
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Old October 31st, 2012, 04:59 PM   #387
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Quote:
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The whole track will be covered with the tube?
All non-tunneled sections are to have covers in some form, known as 'noise hoods.' They aren't required for the system, but for the strict noise regulations in Japan.

Construction on the test track is planned to end late 2013 / early 2014, from what I hear.

Last edited by pdovak; November 26th, 2012 at 09:43 PM.
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Old October 31st, 2012, 08:22 PM   #388
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All non-tunneled sections are to be covered by these tubes, known as 'noise hoods.' They aren't required for the system, but for the strict noise regulations in Japan.

Construction on the test track is planned to end late 2013 / early 2014, from what I hear.
Thanks a lot for your answer! Would never think that Maglev would be more noisy than high speed trains.
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Old October 31st, 2012, 08:43 PM   #389
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It's quite sad you won't be able to enjoy the speed during the trip. But on another hand I wonder if this enclosure could potentially be used in future when faster maglev trains will be developed which would require vacuum to operate. Have anybody a clue if such adaptation is theoretically possible in this case and if it is maybe taken under consideration for more distant future?
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Old October 31st, 2012, 10:21 PM   #390
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How come maglev's noisier than conventional HSR?
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Old October 31st, 2012, 10:53 PM   #391
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Tunnelboom's.
If it's all a tunnel then you won't have that issue.
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Old October 31st, 2012, 11:29 PM   #392
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You mean sonic boom, as in exceeding the sound barrier a.k.a. maximum speed of sound?
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Old November 1st, 2012, 12:50 AM   #393
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Yeah, it's a type of sonic boom that occur when a train exits a tunnel at high speeds, the higher the speed the more noise you get. In Japan there is a strict 70dB limit on how noisy a train is allowed to be in built up areas, then this is a problem. So by adding a roof to the structure, thus making the whole thing (that is in a built up area) a tunnel you eliminate that problem.

More at: http://en.wikipedia.org/wiki/Tunnel_boom

There are videos on Youtube where you can hear them, but they seems to have some server issues at the moment I'm unable to link to any of them.
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Old November 1st, 2012, 12:54 AM   #394
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So what's with the unbuilt up area? Is the track going to have the tunnel there as well?
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Old November 1st, 2012, 01:48 AM   #395
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Hmmmm. Any chance of learning what might be the dampening characteristics of these planned outdoor tubes? Plus is an intercity route now being constructed? If not, then what fraction of the design phase is now complete?
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Old November 1st, 2012, 04:50 AM   #396
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Quote:
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Hmmmm. Any chance of learning what might be the dampening characteristics of these planned outdoor tubes? Plus is an intercity route now being constructed? If not, then what fraction of the design phase is now complete?
Don't know the details but what I heard is that it acts like a silencer for a gun in which it has slits on the tunnel which releases air from the side so some of the force of booming will dissipate from the mouth of the tunnel.
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Old November 1st, 2012, 05:24 AM   #397
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Quote:
Originally Posted by patrykus View Post
It's quite sad you won't be able to enjoy the speed during the trip. But on another hand I wonder if this enclosure could potentially be used in future when faster maglev trains will be developed which would require vacuum to operate. Have anybody a clue if such adaptation is theoretically possible in this case and if it is maybe taken under consideration for more distant future?
Nope, not unless you create airtight doors for the areas that are underground/in tunnels.
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Old November 1st, 2012, 05:49 AM   #398
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This is pretty exciting ... remind us, please, just what speeds are being bandied about here.
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Old November 1st, 2012, 12:32 PM   #399
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Quote:
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Nope, not unless you create airtight doors for the areas that are underground/in tunnels.
Thought it can't be completely sealed. Thanks for the response. Does anybody know the answer to my other question: Are there any sections of the track between Tokyo and Nagoya (or Osaka) located in non residential area so the tube won't be necessary?
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Old November 1st, 2012, 05:41 PM   #400
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Yeah, it's a type of sonic boom that occur when a train exits a tunnel at high speeds, the higher the speed the more noise you get.
Tunnel boom is created when the train enters the tunnel, the shock wave traverses the tunnel at the speed of sound. The effect is at the exit, but caused at the entrance.
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