Singh, Neelratan and Azad, Md Alquamar and Singh, S K and Alok, Apurva (2022) Evaluation of a Preliminary Support Design of Railway Tunnel Adit in Inner Lesser Himalaya India: An Empirical Analysis. In: IOP Conf. Series: Earth and Environmental Science.

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Abstract

This article addresses the excavation method and support design for the adit tunnel in the Rudraprayag District, Lesser Himalayas of India, using Rock Mass Rating (RMR), Tunneling Quality Index (Q), and New Austrian Tunneling Method (NATM). Based on ONORM B 2203 correlations with RMR and Q systems, the New Austrian Tunneling Method rock structure classes were developed. Because the geology was constantly changing, NATM concepts were applied. The RMR-based rock mass estimates were overestimated, but the qualitative investigation was correct. The NATM method is more appropriate for a Garhwal Himalayan rock with varying rock mass uncertainty. The present adit research reveals several outstanding questions about rock mass quality, tunnel behavior during construction, and use. The analysis results might be used to build new tunnels in comparable terrain in other parts of the world.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	NATM; RMR; Tunneling Quality Index (Q); Excavation Method; Support Analysis; Lesser Himalaya
Subjects:	Blasting
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	12 Jul 2022 06:41
Last Modified:	12 Jul 2022 06:41
URI:	http://cimfr.csircentral.net/id/eprint/2511

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