Vulnerability analysis of tunnel linings under blast loading

Chaudhary, Ranjit Kumar; Mishra, SK; Chakraborty, Tanusree; Matsagar, Vasant

doi:10.1177/2041419618789438

Cited by 36 publications

(19 citation statements)

References 25 publications

(47 reference statements)

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“…Also, it was observed that the lining portion located near to the blast source experienced a considerable amount of permanent deformation. Chaudhary et al [44] presented a comparison between the use of conventional and advanced tunnel lining materials subjected to blast loading of 10 kg TNT. The plain concrete (PC), steel reinforced cement concrete and steel fiber reinforced concrete(SFRC) were considered as conventional materials, see Fig.…”

Section: Influence Of Lining Materials In Tunnelmentioning

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 Lining Materials In Tunnelmentioning

confidence: 99%

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

Senthil¹,

Sethi²,

Pelecanos³

2021

JSEAM

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“…Tunnels are considered as high‐risk zones due to the presence of numerous patronage in confined space at a single location 5 . Some of the manmade hazards in the tunnels that have caused severe loss of life and property are Bayrampasa metro tunnel attack, London underground metro attack, Moscow metro tunnel attack, Minsk metro bombing, and Saint Petersburg metro attack 6 . Therefore, the blast resistant design of tunnels and other underground utility structures is required.…”

Section: Introductionmentioning

confidence: 99%

The response of rock tunnel when subjected to blast loading: Finite element analysis

Zaid

Sadique

2020

Engineering Reports

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In the past few decade tunnels were targeted to explosives and that resulted in sizeable structural damage. The increase in the strategic importance of tunnel construction has increased the demand for the blast‐resistant design approach. The present paper considered an internal blast loading on a rock tunnel constructed in Quartzite rock. A three‐dimensional finite element model of the tunnel has been developed in Abaqus. The diameter of the tunnel has been kept constant to a two‐lane transportation tunnel. However, the thickness of the concrete liner, depth of overburden, and mass of explosive charge has been varied to understand the response in different possible conditions. The Jones‐Wilkins‐Lee, Concrete Damage Plasticity, and Mohr‐Coulomb material models have been used for the modeling of trinitrotoluene, concrete, and rock respectively. Blast has been formulated through Coupled‐Eulerian‐Lagrangian technique. The tunnel at 12.5 of the depth of overburden has been found 2.7‐times more blast resistant than 5 m. Moreover, the extent of damage in shallow depth tunnels found to be more than the tunnels at higher depth of overburden.

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“…Later, London underground metro tunnels had experienced three explosion events where 700 people were injured and 52 deaths were reported [2]. In past two decades, there has been a rise in blastrelated disasters at Moscow metro tunnel (2010), Minsk metro (2011), Bayrampasa metro (2015), Saint Petersburg metro (2017) and many more [3]. Due to several uprising and insurgency in the world, tunnels have faced extreme loading events in the past few decades [3].…”

Section: Introductionmentioning

confidence: 99%

“…In past two decades, there has been a rise in blastrelated disasters at Moscow metro tunnel (2010), Minsk metro (2011), Bayrampasa metro (2015), Saint Petersburg metro (2017) and many more [3]. Due to several uprising and insurgency in the world, tunnels have faced extreme loading events in the past few decades [3]. Therefore, blast resistant design of tunnel is necessary to prevent the casualties and strengthen the metro tunnel against blast-related disasters.…”

Section: Introductionmentioning

confidence: 99%