Numerical analysis of dynamic response and impact resistance of a large-span rock shed in a tunnel under rockfall impact

Wang Shuang; Zhou Xiaojun; Jiang Bo; Zhou Yuefeng

doi:10.11883/1001-1455(2016)04-0548-09

Volume 36 Issue 4

Oct. 2018

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Chen Qian-yi. A high-resolution Eulerian method and its application to shaped charge jet[J]. Explosion And Shock Waves, 2013, 33(4): 420-424. doi: 10.11883/1001-1455(2013)04-0420-05

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Wang Shuang, Zhou Xiaojun, Jiang Bo, Zhou Yuefeng. Numerical analysis of dynamic response and impact resistance of a large-span rock shed in a tunnel under rockfall impact[J]. Explosion And Shock Waves, 2016, 36(4): 548-556. doi: 10.11883/1001-1455(2016)04-0548-09

Chen Qian-yi. A high-resolution Eulerian method and its application to shaped charge jet[J]. Explosion And Shock Waves, 2013, 33(4): 420-424. doi: 10.11883/1001-1455(2013)04-0420-05

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Numerical analysis of dynamic response and impact resistance of a large-span rock shed in a tunnel under rockfall impact

doi: 10.11883/1001-1455(2016)04-0548-09

1.
MOE Key Laboratory of Transportation Tunnel Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
2.
China Railuay Eryuan Engineering Group Co., Ltd, Chengdu 610031, Sichuan, China

Received Date: 2014-09-03
Rev Recd Date: 2014-12-25
Publish Date: 2016-07-25

Abstract

Abstract

In this work, based on the determination of the rockfall impact energy and using the dynamic finite element numerical method, we analyzed dynamic responses of large-span shed-tunnels of mountain tunnels under rockfall impact, and investigated the characteristics of damages suffered by the shed-tunnel structure's reinforced-concrete. The impact depth time-history curve and impact force time-history curve under different conditions were presented for comparison and different buffering effects were also summarized for comparison between the common soil and the light soil on which shed-tunnels were constructed. Meanwhile, suggestions concerning the choice of backfilled soil and the propriety of its thickness were proposed. The results from our study will be valuable for the design of mountain tunnels' large-span shed-tunnels and the prevention of rockfall that may damage them.
- solid mechanics,
- dynamic response,
- rockfall,
- impact load,
- large-span shed-tunnel,
- light soil,
- concrete damage

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References

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