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。
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.
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.
引文
[1]田志敏,邬玉斌,罗奇峰.隧道内爆炸冲击波传播特性及爆炸荷载分布规律研究[J].振动与冲击,2011,30(1):21–26.(TIAN Zhimin,WU Yubin,LUO Qifeng.Characteristics of in-tunnel explosion-induced air shock wave and distribution law of reflected shock wave load[J].Journal of Vibration and Shock,2011,30(1):21–26.(in Chinese)
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[7]莫海鸿,邓飞皇,王军辉.运营期地铁盾构隧道动力响应分析[J].岩石力学与工程学报,2006,25(2):3 508–3 512.(MO Haihong,DENG Feihuang,WANG Junhui.Analysis of dynamic responses of shield tunnel during metro operation[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(2):3 508–3 512.(in Chinese))
[8]丁俊宏,金先龙,郭毅之,等.盾构隧道地震响应的三维数组模拟方法及应用[J].岩石力学与工程学报,2006,25(7):1 430–1 436.(DING Junhong,JIN Xianlong,GUO Yizhi,et al.Three-dimensional numerical simulation method and it′s application to seismic response of shield tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(7):1 430–1 436.(in Chinese))
[9]闫秋实,刘晶波,伍俊.地铁区间隧道内爆炸反应的数值模拟[J].防护工程,2009,31(2):52–56.(YAN Qiushi,LIU Jingbo,WU Jun.Numerical simulation of subway tunnel inter-explosion[J].Protective Engineering,2009,31(2):52–56.(in Chinese))
[10]耿萍,何川,晏启祥.盾构隧道纵向地震响应分析[J].西南交通大学学报,2007,42(3):283–287.(GENG Ping,HE Chuan,YAN Qixiang.Analysis of longitudinal seismic response of shield tunnel[J].Journal of Southwest Jiaotong University,2007,42(3):283–287.(in Chinese)).
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[2]TIAN Z M,WU Y B,ZHANG X B,et al.Study on propagation of in-tunnel explosion induced air shock wave and distribution of blast load on inner surface of the tunnel[C]//Proceedings of the 8th International Conference on Shock and Impact Loads on Structures.Adelaide,Australia:[s.n.],2009:659–667.
[3]杜修力,廖维张,田志敏,等.炸药爆炸作用下地下结构的动力响应分析[J].爆炸与冲击,2006,26(5):474–480.(DU Xiuli,LIAO Weizhang,TIAN Zhimin,et al.Dynamic response analysis of underground structures under explosion-induced loads[J].Explosion and Shock Waves,2006,26(5):474–480.(in Chinese))
[4]李忠献,刘杨,田力.单侧隧道内爆炸荷载作用下双线地铁隧道的动力响应与抗爆分析[J].北京工业大学学报,2006,32(2):173–181.(LI Zhongxian,LIU Yang,TIAN Li.Dynamic response and blast-resistance analysis of double track subway tunnel subjected to blast loading within one side of tunnel[J].Journal of Beijing University of Technology,2006,32(2):173–181.(in Chinese))
[5]刘慧.近距侧爆情况下马蹄形隧道动态响应特点的研究[J].爆炸与冲击,2000,20(2):175–181.(LIU Hui.Dynamic response of hoof-shaped tunnels to adjacent blastings[J].Explosion and Shock Waves,2000,20(2):175–181.(in Chinese))
[6]刘沐宇,卢志芳.接触爆炸荷载下长江隧道的动力响应分析[J].武汉理工大学学报,2007,29(1):113–117.(LIU Muyu,LU Zhifang.Analysis of dynamic response of Yangtze river tunnel subjected to contact explosion loading[J].Journal of Wuhan University of Technology,2007,29(1):113–117.(in Chinese))
[7]莫海鸿,邓飞皇,王军辉.运营期地铁盾构隧道动力响应分析[J].岩石力学与工程学报,2006,25(2):3 508–3 512.(MO Haihong,DENG Feihuang,WANG Junhui.Analysis of dynamic responses of shield tunnel during metro operation[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(2):3 508–3 512.(in Chinese))
[8]丁俊宏,金先龙,郭毅之,等.盾构隧道地震响应的三维数组模拟方法及应用[J].岩石力学与工程学报,2006,25(7):1 430–1 436.(DING Junhong,JIN Xianlong,GUO Yizhi,et al.Three-dimensional numerical simulation method and it′s application to seismic response of shield tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(7):1 430–1 436.(in Chinese))
[9]闫秋实,刘晶波,伍俊.地铁区间隧道内爆炸反应的数值模拟[J].防护工程,2009,31(2):52–56.(YAN Qiushi,LIU Jingbo,WU Jun.Numerical simulation of subway tunnel inter-explosion[J].Protective Engineering,2009,31(2):52–56.(in Chinese))
[10]耿萍,何川,晏启祥.盾构隧道纵向地震响应分析[J].西南交通大学学报,2007,42(3):283–287.(GENG Ping,HE Chuan,YAN Qixiang.Analysis of longitudinal seismic response of shield tunnel[J].Journal of Southwest Jiaotong University,2007,42(3):283–287.(in Chinese)).
[11]HALLQUIST J Q.LS-DYNA theoretical manual[M].USA:Livermore Software Technology Corporation,1998:19–20.
[12]SRIRAM R,VAIDYA U K.Blast impact on aluminum foam composite sandwich panels[C]//Proceedings of the 8th International LS-DYNA Users Conference.Michigan,USA:[s.n.],2004:14–29.
[13]北京理工大学.ANSYS/LS–DYNA算法基础和使用方法[M].北京:ANSYS/LS-DYNA中国技术支持中心,1999:28–30.(Beijing Institute of Technology.Algorithm foundation and using method of the ANSYS/LS-DYNA[M].Beijing:ANSYS/LS-DYNA Technical Support Center in China,1999:28–30.(in Chinese))
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