Effect of Internal Blast on Tunnel Lining and Surrounding Soil

Goel, Manmohan Dass; Verma, Shivani; Panchal, Sandeep

doi:10.1007/s40098-020-00451-1

Cited by 9 publications

(3 citation statements)

References 13 publications

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“…In comparison to the PPV method, better reliability in assessment was obtained by SDOF approach, as the tunnel damage levels were either underestimated or overestimated by the PPV method. Goel et al [62] carried out finite element analysis for comparison of the damage caused to the tunnel and surrounding soil considering three different tunnel cross sections i.e. arched, circular and rectangular using 100 kg TNT explosive for saturated and unsaturated soil conditions.…”

Section: Influence Of Shape Of Tunnelsmentioning

confidence: 99%

A review on the performance of the underground tunnels against blast loading

Senthil¹,

Sethi²,

Pelecanos³

2021

JSEAM

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The tunneling system has become an important part of the present infrastructure system in all over the world. Therefore, it has become important to ensure the safety of the tunnels against any type of man-made blasting activities or other accidental blasting occurrence. In order to evaluate the performance of the tunnels against blast loading, a detailed review is carried out. Based on the review in the last couple of decades, the various parameters such as tunnel lining materials, tunnel shapes, tunnel lining thickness, tunnel burial depth, charge weight and standoff distance are high influences on the performance of underground tunnels against blast loading. It was observed that the tunnel roof and the tunnel wall center are most vulnerable to the blast loads. Also, it was found that more of the tunnel lining thickness results in lesser deformation at the tunnel roof and the tunnel wall center. The increase in the burial depth of the tunnel would reduce the extent of damage to the tunnel caused by effects of surface blast loading. The stiffness and strength of the ground media may be enhanced against the effects of blast loading by grouting measures. The studies revealed that the lining materials possessing blast waves absorbing properties can be best suited to be used in tunnel linings. Further, it was observed that more damage was caused to the tunnels due to the magnitude of the charge weight. An increase in the blast load causes a significant increase in the fracture area, residual stress and lateral displacement caused to the tunnel by the action of blast load. The standoff distance of the blast load from the tunnel also plays a significant role in the damage of the tunnel. More is the distance between the charge and the tunnel, lesser damage caused to the tunnels. In addition to that, the lining thickness was predicted and the trend was calibrated and fitted logarithmically with the available results. Based on the observation from the literature, it is concluded that the use of a single lining material in the tunnel against blast loading was studied predominantly in the couple of decades. Further, the performance of the tunnels in combination of different tunnel lining materials against blast loading was found limited. The influence of barriers to save the underground tunnels against blast loading was found limited.

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Section: Influence Of Shape Of Tunnelsmentioning

confidence: 99%

A review on the performance of the underground tunnels against blast loading

Senthil¹,

Sethi²,

Pelecanos³

2021

JSEAM

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“…However, nowadays, fire cannot be regarded as the only extreme accidental action: recent terroristic attacks have raised the doubt that tunnel infrastructures can also be regarded as critical targets, not only for significant life losses, but also for the huge overall costs to society, that critical damage to this kind of infrastructure can induce. Over the last decade, several researchers started to examine the behaviour of tunnels (particularly metro tunnels) subjected to internal explosion encompassing both simplified and refined numerical models [16] [17] [18][19] [20] [21] [22][23] [24] [25]. At present, there are no experimental studies reported in literature on the topic of tunnels subjected to internal blast loads.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on the structural response of RC slabs subjected to combined fire and blast

et al. 2021

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“…Currently, there is no test data available in the open literature on tunnel lining subjected to internal blast loading. The explosion tests of reinforced concrete (RC) slabs have been widely used in previous studies(Goel et al (2020);Yang et al (2019);Zaid and Sadique (2020);) for model calibration and the response prediction of tunnel linings subjected to blast loads . In this study, the calibrated model for the RC slab is also used to predict structural response of tunnel linings due to similar structural configurations and material models of RC slabs and RC lining.In this study, an experiment of RC slab subjected to a TNT explosion(Wang et al, 2012) is used to calibrate the numerical model for tunnel lining structure.…”

mentioning

confidence: 99%