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Fibre‐optic supported measurement methods for monitoring rock pressure
Author(s) -
Henzinger Michael R.,
Schachinger Tobias,
Lienhart Werner,
Buchmayer Fabian,
Weilinger Walter,
Stefaner Raimund,
HaberlerWeber Michaela,
Haller EvaMaria,
Steiner Michael,
Schubert Wulf
Publication year - 2018
Publication title -
geomechanics and tunnelling
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.317
H-Index - 18
eISSN - 1865-7389
pISSN - 1865-7362
DOI - 10.1002/geot.201800015
Subject(s) - rock mass classification , deformation monitoring , deformation (meteorology) , continuous monitoring , geotechnical engineering , computer science , environmental science , structural engineering , mining engineering , mechanical engineering , engineering , geology , oceanography , operations management
Like every civil engineered structure tunnels are subject to an ageing process. The reasons for the degrading of the condition are manifold: not fully completed stress redistribution, deterioration in the rock mass quality through long‐term exposure (creeping), weathering or dynamic loads and stresses, to name but a few. All this processes lead to a deformation of the surrounding bedrock and the lining. For a continuous monitoring of a tunnel condition the measurement of the deformation is necessary. Conventional methods are elaborate and time‐consuming and require almost always a shutdown of the tunnel for traffic. Therefore, an inspection is done selectively with large time gaps. A continuous condition assessment becomes hardly possible. Currently no robust method for permanent monitoring of tunnels exists. With a fibre optic measuring method many of these restrictions can be overcome. In the course of this research project, a novel and innovative measuring methodology has been developed to continuously and extensively measure rock deformations. The measurement results were evaluated performing laboratory tests. Subsequently, they were installed in the course of a field test at the Semmering Base Tunnel. With complementary technologies such as laser scanning, the measurement methodology could be verified for its applicability.