Jhanwar, J.C. and Goel, R. K. and Chakraborty, A.K. and Bandopadhyay, C. (2003) Design of tunnel support and blasting for railway tunnels in basaltic rocks - A case study. Journal of Rock Mechanics and Tunnelling Technology , 9 (2). pp. 143-154. ISSN 0971-9059

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Four railway tunnels were proposed in the Kurduwadi-Latur section of Central Railway, Solapur division, India. The rock mass in the area was predominantly basalts composed of mainly compact basalt with amygdaloidal basalt at a few locations. Investigations were conducted to formulate support and blast design guidelines for these proposed tunnels using empirical methods. The investigation included rock mass characterization along the proposed tunnels using Barton’s Q and Bieniawski’s RMR approaches and the estimation of tunnel stability parameters. The rock mass was classified as good in most of the tunnel length and as poor at a few locations. The ground condition was estimated as non-squeezing type. The recommended support system included a comination of plain and steel fibre reinforced shotcrete (SFRS) along with systematic rock bolting in the tunnel length and the steel supports and back fill concrete in the portal regions. The blast design included heading and benching method with detail on blast patterns, estimated charge factors, etc.

Item Type: Article
Uncontrolled Keywords: Railway tunnel, rock mass characterisation, support design, blast design
Subjects: Blasting
Depositing User: Dr. Satyendra Kumar Singh
Date Deposited: 05 Dec 2011 05:59
Last Modified: 05 Dec 2011 05:59
URI: http://cimfr.csircentral.net/id/eprint/268

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