Numerical Simulation of Explosion in Twin Tunnel System

Verma, AK and Jha, Manish Kumar and Mantrala, Srinivas and Sitharam, TG (2017) Numerical Simulation of Explosion in Twin Tunnel System. In: Geotechnical and Geological Engineering, 35 (5). pp. 1953-1966. ISSN 0960-3182

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Abstract

Rapid growth of urban population in Indian cities have led traffic congestion leading to demand for scientific utilization of underground space. Immediate underground level and deep level underground below the major arterial roads are the sustainable spaces available for meeting the demand of the future traffic/transport. Due to recent increased transit activities it has become one of the soft targets by terrorists or prone to catastrophic accidents in recent years which have increased the importance of rock structures study under explosive loading. In this paper, the response of a underground metro tunnel subjected dynamic loads have been investigated including explosive capacity (30 kg TNT), ground characteristics, liner thickness and blast pressure characteristics. Blast pressure representing CONWEP air blast loading model with positive over pressure phase was applied to lining of tunnel. A three dimensional explicit finite element method was used to analyze dynamic response and damage in twin tunnels of underground metro. It is found that liner of thickness 28 cm will start deforming at the explosive loading of more than 65 kg TNT.

Item Type:	Journal Article
Publication:	Geotechnical and Geological Engineering
Publisher:	Springer International Publishing
Additional Information:	The copyright of this article belongs to the Springer International Publishing.
Keywords:	Blast loading; CONWEP; FEM; Numerical modelling; TNT; Twin tunnel
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	26 May 2022 11:12
Last Modified:	26 May 2022 11:12
URI:	https://eprints.iisc.ac.in/id/eprint/72690

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