土工基础

土工基础 ›› 2024, Vol. 38 ›› Issue (3): 449-452.

• 专题论述 • 上一篇    下一篇

偏心爆炸荷载下盾构隧道结构的动力响应研究

唐雄俊1，封 坤2，肖明清1,3，张景轩2   

  1. （1.中铁第四勘察设计院集团有限公司，武汉 430063；2.西南交通大学交通隧道工程教育部重点实验室，成都 610031；3.水下隧道技术湖北省工程实验室，武汉 430063）
  • 收稿日期:2022-09-09 修回日期:2022-09-23 出版日期:2024-06-30 发布日期:2024-09-16
  • 作者简介:唐雄俊（1983-），男，高级工程师，研究方向为隧道设计。
  • 基金资助:
    国家自然科学基金项目（52078430）

Dynamic Response of a Shielded Tunnel Structure under Eccentric Blast Loads

TANG Xiongjun1, FENG Kun2, XIAO Mingqing1,3， ZHZANG Jingxuan2   

  1. (1.China Railway Siyuan Survey and Design Group Co. Ltd., Wuhan 430063；
    2.Key Laboratory of Transportation Tunnel Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu 610031；
    3.Hubei Provincial Engineering Laboratory for Underwater Tunnel, Wuhan 430063)
  • Received:2022-09-09 Revised:2022-09-23 Online:2024-06-30 Published:2024-09-16

摘要： 以甬舟铁路金塘海底隧道为研究背景，采用ANSYS/LS-DYNA建立基于偏心爆炸作用下衬砌结构动力响应的有限元模型，分析管片衬砌、二次衬砌以及行车道板等结构的应力和位移响应。结果表明，40 kg TNT炸弹偏心爆炸主要影响局部构件的使用安全，其主要应对措施是及时开展隧道衬砌及内部结构的局部修复；距离起爆断面14 m，40 kg TNT炸弹偏心爆炸引起的结构位移较小；衬砌节点位移在极短时间内迅速增至最大值，随后以接近正弦脉冲的变化规律逐渐递减，随着纵向距离增加位移峰值出现的时间逐渐向后推移。


关键词: 盾构隧道, 偏心爆炸, 动力响应, 数值模拟

Abstract: This paper presents a case history of Jintang Subsea Tunnel of Yongzhou Railway. The commercial software ANSYS/LS-DYNA is used to establish the finite element model by using the dynamic response of the lining structure under the eccentric explosion. The stress and displacement response of the segment lining, secondary lining and lane plate are also evaluated. The results show that the eccentric explosion of a 40kg TNT bomb mainly affects the safety of the local components, and the main countermeasures are to perform the local repair of the tunnel lining and the internal structure in time. The structure displacement caused by the eccentric explosion of a 40kg TNT bomb 14m away from the initiation section is small. The displacement of the lining nodes rapidly increases to the maximum value in a very short time, and then gradually decreases with a variation pattern close to the sinusoidal pulse, and the time of the peak displacement gradually moves backward with the increase of longitudinal distance.

Key words: Shielded Tunnel, Eccentric Explosion, Dynamic Response, Numerical Simulation

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