PROCEEDINGS OF TUNNEL ENGINEERING, JSCE
Online ISSN : 1884-9091
ISSN-L : 1345-0832
State of residual stress in curved H-beam used for tunnel support
Shinichi AKUTAGAWAKenji OIMichihiro OTAKoji YASUHARANaoko KUCHIIKETakashi MATSUOKATakuya ODA
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JOURNALS FREE ACCESS

2003 Volume 13 Pages 141-146

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Abstract

A magnetic anisotropy sensor is built on the principle of the magneto-strictive effect in which changes in magnetic permeability due to deformation of a ferromagnetic material is measured in a nondestructive manner, which then can be translated into the absolute values of stresses existing on the surface. This technique was applied to measure stresses of H-beams, used as tunnel support structures, to confirm expected measurement accuracy. The results show that this method could be one of the promising technologies for non-destructive stress measurement for safe construction and probably maintenance of rock structures.

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© by Japan Society of Civil Engineers
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