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Rasoli, A., Khodaparast, M., Moghtadaee, H. (2022). Determine the effective range and safe distance from the nail wall under surface and subsurface blast loads. Electronic and Cyber Defense, 12(4), 375-387.
Ali Rasoli; mahdi Khodaparast; Hosein Moghtadaee. "Determine the effective range and safe distance from the nail wall under surface and subsurface blast loads". Electronic and Cyber Defense, 12, 4, 2022, 375-387.
Rasoli, A., Khodaparast, M., Moghtadaee, H. (2022). 'Determine the effective range and safe distance from the nail wall under surface and subsurface blast loads', Electronic and Cyber Defense, 12(4), pp. 375-387.
Rasoli, A., Khodaparast, M., Moghtadaee, H. Determine the effective range and safe distance from the nail wall under surface and subsurface blast loads. Electronic and Cyber Defense, 2022; 12(4): 375-387.

Determine the effective range and safe distance from the nail wall under surface and subsurface blast loads

علوم و فناوریهای پدافند نوین
Volume 12, Issue 4 - Serial Number 46, February 2022, Pages 375-387    PDF (1.3 M)
Document Type: Original Article
Authors
Ali Rasoli1; mahdi Khodaparast* 2; Hosein Moghtadaee3
1Master's degree, University of Qom, Qom, Iran.
2Associate Professor, University of Qom, Qom, Iran.
3PhD student, Qom University, Qom, Iran.
Receive Date: 31 August 2021,  Revise Date: 26 October 2021,  Accept Date: 10 November 2021 
Abstract
The development of passive defense systems and the importance of blast load and adoption of necessary measures regarding the effects of blast loading on the design and performance of underground structures, including stabilized excavations using the nailing method, make it necessary to investigate the effect of blasting on performance and deformation of nailed walls. Therefore, in the present study, three-dimensional modeling and nonlinear dynamic analysis of a nailed wall to a depth of 9 meters, under the blast load were investigated using the Coupled Eulerian-Lagrangian method in Abacus software. To model the blast load, TNT explosive was used in different masses on the ground surface and at depths of 2, 4, and 6 meters behind the wall. In this study, while defining the two concepts of safe distance and explosion impact range, the results showed that in the stabilization of the nailed wall under the blast load, the increase in explosive mass causes an increase in the horizontal deformation created at the edge of the excavation wall and the stress created in the nails. Also, the effect of subsurface explosion on the stability of the nailed wall is greater than the surface explosion with the same mass of explosive.
Keywords
blast load; nailed wall; horizontal deformation; nail stress; sandy clay; safe distance; effective distance
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