Control of Strained Condition of Mining and Construction Objects by Polariscope PShK-S



Yu.G. Feklistov, Cand. Sci. (Eng.), Laboratory Head A.V. Zubkov, Dr. Sci. (Eng.), Chief Research Worker R.V. Krinitsin, Research Associate, Roman_krinicyn@mail.ru IGD UrO RAN, Ekaterinburg, Russia

Annotation:

Issues are considered related to the control of the strained deformed condition of the rock massif, construction of objects from concrete structures, and also the bearing structures of bridges and viaducts for ensuring their stability and safety of operation by means of polariscope and photoelastic sensors.
The coaxial scheme (C) of illumination of the polariscope scheme is described, for which the patent of the Russian Federation is receieved. Such a scheme ensures reduction of losses and distortion of the light flux due to refusal of delivering the beams at an angle to the optical axis. Besides, the lack of the mirror and influx to the main case for lighting installation considerably simplifies and facilitates the device design, and also the technology of its fabrication and assembly. Device mass — 0,53 kg, in a set — 4 kg.
Use of photoelastic sensors in practice is shown. They are capable to work in the damp environment more than 10 years. There is a possibility to use sensors independently for fixing of strains changes in time or in complex with other means of measurement when defining mechanical properties of the rock massif.
Main places of photoelastic sensors application: Inguri dam of hydroelectric power station, tunnels of Sverdlovsk subway, the object of Spetsstroy of Russia in the Urals, the mine of OAO Magnezit Plant (Satka), the Severopeschanskaya mine (Northern Urals), Sokolovsk underground mine (Kazakhstan).

References:

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DOI: 10.24000/0409-2961-2017-12-22-26
Year: 2017
Issue num: December
Keywords : mine workings strained condition photoelastic sensors polariscope scheme of lighting stability interference pattern timber subway hydraulic structures
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