DBPapers
DOI: 10.5593/SGEM2014/B12/S2.045

EXPERIMENTAL ESTIMATION OF THE MECHANICAL CONDITION OF REINFORCED CONCRETE LINING IN UNDERGROUND EXCAVATIONS

V. Baryshnikov, D. Baryshnikov, A. Khmelinin
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-08-7 / ISSN 1314-2704, June 19-25, 2014, Book 1, Vol. 2, 349-356 pp

ABSTRACT
The paper describes the field research into mechanical condition of reinforced concrete lining in an underground excavation. The deformation properties of concrete are estimated and the actual stresses in the lining are evaluated using the method of parallel hole drilling. In order to avoid intersection of measurement hole and rock bolts, the authors offer the procedure for choosing the measurement hole location based on the results of geo-radar scanning of the lining. From the trials, the proposed method and procedure enable reliable control of actual stress state of underground excavation lining and its safety factor assessment.

Keywords: underground excavation, reinforced concrete lining, parallel hole drilling method, stress state, deformation properties.