Tunnel Lining With Pumped Concrete

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Title: Tunnel Lining With Pumped Concrete

Author(s): Lewis H. Tuthill

Publication: Journal Proceedings

Volume: 68

Issue: 4

Appears on pages(s): 252-262

Keywords: concrete construction: concretes; construction joints; formwork (construction); mix proportioning: placing: pumped concrete; pumps; tunnel linings; vibration; workability,

Date: 4/1/1971

Abstract:
This paper describes many practical details of procedure which contribute to getting a first class job of concrete placement in tunnel lining. This includes first, discussion of invert placement followed by considerations for proper proportioning of concrete ingredients for successful and efficient pumping. This is followed by a description of an effective tunnel lining procedure including many details which contribute to good performance of the pump and to better results in the placement. The author concurs with those who consider that in man situations the concrete pump is more likely to place a tunnel lining superior to t at I placed by pneumatic equipment which discharges the concrete at a high velocity. These matters are also referenced and discussed.