Dynamic Analysis of a Twin Tunnel in Soil Subjected to Internal Blast Loading

Tiwari, Rohit; Chakraborty, Tanusree; Matsagar, Vasant

doi:10.1007/s40098-016-0179-5

Cited by 30 publications

(11 citation statements)

References 23 publications

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“…Recently, the advanced numerical techniques were broadly used to analyse the behaviour of underground tunnels that were exposed to internal or external explosions owing to its vital ability to provide valuable data within a short time, lower cost, and secure environment. Several scholars investigated the dynamic behaviour of underground tunnels exposed to an internal detonation, such as [13][14][15][16][17][18]. Tiwari et al [19,20] evaluated the behaviour of an underground tunnel with a circular shape under the impact of an internal blast by using a coupled Eulerian-Lagrangian (CEL) solver that was available in ABAQUS software [21].…”

Section: Introductionmentioning

confidence: 99%

Blast Damage Assessment of Symmetrical Box-Shaped Underground Tunnel According to Peak Particle Velocity (PPV) and Single Degree of Freedom (SDOF) Criteria

et al. 2018

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This study aimed to determine the reliability of the damage criteria that was adopted by the peak particle velocity (PPV) method and the single degree of freedom (SDOF) approach to assess the damage level of a box-shaped underground tunnel. An advanced arbitrary Lagrangian Eulerian (ALE) technique available in LS-DYNA software was used to simulate a symmetrical underground tunnel that was subjected to a surface detonation. The validation results of peak pressure into the soil revealed a good consistency with the TM5-855-1 manual within differences that were much less than previous numerical studies. The pressure contours revealed that the blast waves travelled into the soil in a hemispherical shape and the peak reflected the pressure of the tunnel that occurred immediately before the incident pressure reached its highest value. The assessment results proved that the criteria of the above methods could efficiently predict the damage level of a box-shaped tunnel under different circumstances of explosive charge weight and lining thickness at a depth of 4 m within slight differences that were observed during van and small delivery truck (SDT) explosions. However, the efficiency of both the methods was varied with the increase of burial depth. Whereas, using the PPV method significantly underestimated or overestimated the damage level of the tunnel, especially during SDT and container explosions with a lining thickness of 250 mm at burial depths of 6 and 8 m, respectively, the damage level that was obtained by the SDOF method greatly matched with the observed failure modes of the tunnel. Furthermore, new boundary conditions and equations were proposed for the damage criteria of the PVV method.

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Section: Introductionmentioning

confidence: 99%

Blast Damage Assessment of Symmetrical Box-Shaped Underground Tunnel According to Peak Particle Velocity (PPV) and Single Degree of Freedom (SDOF) Criteria

et al. 2018

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“…It was noticed that the zone is totally crushed in case of dynamic loading. Tiwari et al, (2016) conducted a study on analyze the behavior of twin tunnel under dynamic conditions. The twin tunnel consists of tunnel reinforced concrete lining which is subjected to internal blast loading.…”

Section: Deformations Of Tunnels Under Different Conditionsmentioning

confidence: 99%

Deformation Behaviour of Tunnels under Different Loading Conditions: State of Art

Kumar¹,

Shrivastava²

2019

World Congress on Civil, Structural, and Environmental Engineering

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Construction of tunnels as transport medium has become a very important part in various civil engineering practises. Tunnels are constructed and commonly being used for different purposes such as for underground mining, underground parking facilities, military purposes, underground gas pipelines, transportation purposes in metro cities and many more fields. In the present study, the deformation behaviour of tunnels under various loading conditions that may be static load acting on the tunnels due to the overburden pressure, dynamic load due to the earthquakes and impact load causes due to terrorist activities is studied. Various factors which may be responsible for causing deformation cracks in tunnels are being studied. Various theories on stress distribution in tunnels are given by a lot of researchers were also studied.

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“…3, 4 and 5. Many studies have indicated that the construction of the shield-driven tunnels may have great influence on the adjacent soils and buildings [18,19], but fortunately, the shield-driven tunnels have already been completed before this excavation. Therefore, the shield-driven was not modeled in this study.…”

Section: Numerical Model and Parametersmentioning

confidence: 99%

Numerical Simulation of a Deep Excavation near a Shield Tunnel

et al. 2018

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A conveyance water shield tunnel under the Yangtze River, which was designed for the Jiangsu Changshu Power Plant Co., Ltd., was damaged due to water leakage and submersion. In order to complete the engineering, the shield tunnel should be repaired, and the connection between the shield and standpipes should be completed. Therefore, a deep excavation recovery program was designed. According to the excavation design, the distance between the axes of the two tunnels is only 20.8 m, but the depth of excavation reaches 15.1 m. Because of the small distance between the deep excavation and the adjacent west line tunnel, the new excavation in the east line tunnel might have large effects on the west line tunnel, and the environmental effects on the west tunnel due to the excavation should be evaluated. Simulations using 3D and 2D finite element methods were performed. The variations in the loads and lateral deformations on the retaining structures due to earth pressure differences outside and inside the foundation pit were analyzed in detail. The environmental effects on the west line tunnel due to deep excavation were evaluated. The 2D and 3D numerical simulation results were compared. The numerical simulation results agree with practical engineering and are applicable and reliable.

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Dynamic Analysis of a Twin Tunnel in Soil Subjected to Internal Blast Loading

Cited by 30 publications

References 23 publications

Blast Damage Assessment of Symmetrical Box-Shaped Underground Tunnel According to Peak Particle Velocity (PPV) and Single Degree of Freedom (SDOF) Criteria

Blast Damage Assessment of Symmetrical Box-Shaped Underground Tunnel According to Peak Particle Velocity (PPV) and Single Degree of Freedom (SDOF) Criteria

Deformation Behaviour of Tunnels under Different Loading Conditions: State of Art

Numerical Simulation of a Deep Excavation near a Shield Tunnel

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