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Date of Publication:2015-01-01

Journal:岩石力学与工程学报

Volume:34

Issue:7

Page Number:1334-1344

ISSN No.:1000-6915

Abstract:The installation angle of feet-lock pipes has great influence on the
   support effect in controlling the subsidence of steel arch. In order to
   determine the reasonable installation angle,an analytical model of
   feet-lock pipe and steel arch was established based on a brief analysis
   of the working mechanism of feet-lock pipe. The theoretical correlation
   between the installation angle of feet-lock pipe and the vertical
   displacement of vault were derived using the theory of structural
   analysis, elastic foundation beam, etc. Then an example of analysis was
   presented in detail to determine the reasonable angle of installation of
   feet-lock pipe and to explain the corresponding mechanism. Analysis
   indicated that the reasonable installation angle of feet-lock pipe was
   around 45°. More importantly, this was proved to be a general conclusion
   which was consistent with large amounts of the experience from
   construction site. Accordingly, the formulas derived in this paper were
   proved to be correct.

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