The difference between a close face tunnel boring machine ( TBM) and an open face one
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The difference between a close face tunnel boring machine ( TBM) and an open face one

[From: ] [author: ] [Date: 12-11-10] [Hit: ]
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Can anyone help me with the difference between a close face tunnel boring machine ( TBM) and an open face one? I have been reading about it , but I don't know if I have fully understood it. Are the earth pressure balance and slurry pressure balance a close face TBM since they provide face support as well as lateral support with the shield?

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Do these help?
https://docs.google.com/viewer?a=v&q=cac…
http://books.google.co.uk/books?id=Y6-eW…

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Thank you so much

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