偶然性内爆炸作用下盾构隧道的破坏特性分析

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摘要针对拼装组合式盾构隧道的防爆炸灾害设计需要，建立考虑管片–管片、管片–螺栓及管片与周围土体界面接触效应的盾构隧道爆炸动力响应三维有限元分析模型，以典型的地铁区间盾构隧道为例，计算分析内爆炸对盾构隧道结构的破坏机制，揭示管片和连接螺栓的破坏特征，比较研究盾构隧道与整体现浇隧道的抗内爆炸特性。实例分析表明：盾构隧道结构的抗爆性能劣于整体现浇的隧道结构，管片接头是盾构隧道抗内爆炸的最薄弱部位，提高连接螺栓的强度和延性可改善盾构隧道的抗爆特性。

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关键词 ：隧道工程, 内爆炸, 盾构隧道, 管片接头, 连接螺栓, 破坏特征

Abstract：In order to meet the needs of design of prefabricated assembly shield tunnel under explosion，A three- dimensional FEM model for analysis of dynamic response of shield tunnel under internal explosion loading is proposed，which can model the contact effects of segment-segment，segment-bolt and segment-soil. Taking typical metro running shield tunnel as an example，the failure mechanism and dynamic characteristics of the tunnel under internal explosion loading are analyzed. Comparison study of the blast-resistant characteristics between shield tunnel and integral cast in-situ tunnel is conducted，the failure characteristics of segment and bolt are revealed based on calculation results. Example analysis results show that blast-resistant characteristics of shield tunnel is inferior to that of integral cast in-situ tunnel，segment joint is the frail part of shield tunnel to resist internal explosion loading and enhancing bolt strength and tenacity can improve the blast-resistant characteristics of shield tunnel.

Key words： tunnelling engineering internal explosion shield tunnel segment joint connecting bolt failure characteristics

收稿日期: 2010-11-26

引用本文:

邬玉斌1，田志敏1，2，罗奇峰3. 偶然性内爆炸作用下盾构隧道的破坏特性分析[J]. 岩石力学与工程学报, 2011, 30(S2): 3434-3442.
WU Yubin1，TIAN Zhimin1，2，LUO Qifeng3. ANALYSIS ON FAILURE CHARACTERISTICS OF SHIELD TUNNEL UNDER ACCIDENTALLY INTERNAL EXPLOSION LOADING. , 2011, 30(S2): 3434-3442.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/IS2/3434

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