下穿地铁隧道爆破振动作用下给水管道动力响应特性研究
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摘要
为研究下穿地铁隧道开挖过程爆破振动作用下埋地供水管道的动力响应特性,以青岛地铁3号线岭-清段的下穿给水管道隧道爆破工程为例,采用LS-DYNA数值模拟方法进行爆破动力响应计算分析,结合现场对管道正上方地表振动速度监测结果,验证分析了数值模型的可靠性。基于动力数值计算结果,分析了爆破振动作用下管道振动速度及有效应力分布特征,研究了下穿地铁隧道爆破振动作用下给水管道动力响应特性,其中,管道纵向方向上,爆源所在位置管道截面振动速度与有效应力最大,截面环向上,振动速度与有效应力呈现出底部最大,中部次之,顶部最小的规律,同时建立了管道有效应力以及管道正上方地表振动速度函数关系。结合断裂力学理论,确定爆破振动作用下给水钢筋混凝土管的极限动态抗拉强度,其值为2.01 MPa,提出确保管道安全的地表振动速度控制阈值3.32 cm/s。
In order to study the dynamic response characteristics of the buried water supply pipeline under the blasting vibration induced by tunnel excavation,LS-DYNA numerical simulation is adopted to analyzed the dynamic response based on the Ling-Qing section of Tsingtao Metro Line 3.According to the field blasting monitoring test of ground surface,the reliability of the numerical model is proved.Based on the dynamic numerical results,the vibration velocity and effective stress distribution characteristics of pipelines under blasting vibration are analyzed and the dynamic response of the pipeline is discussed,in the longitudinal direction of the pipeline,the vibration velocity and the effective stress of the pipeline section where the explosion is located are the largest,in the circular direction of the section,the greatest vibration velocity and the effective stress are at the bottom of the section followed by middle part and top part.Meanwhile,the functional relationship between the effective stress of the pipeline and the vibration velocity of the surface directly above the pipeline is established.Combined with the theory of fracture mechanics,the ultimate dynamic tensile strength of the reinforced concrete pipe under blasting vibration is determined,which is 2.01 MPa,and the threshold of surface vibration velocity which ensure the safety of the pipeline is proposed,which is 3.32 cm/s.
In order to study the dynamic response characteristics of the buried water supply pipeline under the blasting vibration induced by tunnel excavation,LS-DYNA numerical simulation is adopted to analyzed the dynamic response based on the Ling-Qing section of Tsingtao Metro Line 3.According to the field blasting monitoring test of ground surface,the reliability of the numerical model is proved.Based on the dynamic numerical results,the vibration velocity and effective stress distribution characteristics of pipelines under blasting vibration are analyzed and the dynamic response of the pipeline is discussed,in the longitudinal direction of the pipeline,the vibration velocity and the effective stress of the pipeline section where the explosion is located are the largest,in the circular direction of the section,the greatest vibration velocity and the effective stress are at the bottom of the section followed by middle part and top part.Meanwhile,the functional relationship between the effective stress of the pipeline and the vibration velocity of the surface directly above the pipeline is established.Combined with the theory of fracture mechanics,the ultimate dynamic tensile strength of the reinforced concrete pipe under blasting vibration is determined,which is 2.01 MPa,and the threshold of surface vibration velocity which ensure the safety of the pipeline is proposed,which is 3.32 cm/s.
引文
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[14]蒋楠,周传波.爆破振动作用下既有铁路隧道结构动力响应特性[J].中国铁道科学,2011(6):63-68.[14]JIANG Nan,ZHOU Chuan-bo.Dynamic response characteristics of existing railway tunnel structure subjected to blasting vibration[J].China Railway Science,2011(6):63-68.(in Chinese)
[15]蔡清裕,崔伟峰,向东,等.模拟刚性动能弹丸侵彻混凝土的FE-SPH方法[J].国防科技大学学报,2003(6):87-90.[15]CAI Qing-yu,CUI Wei-feng,XIANG Dong,et al.Simulation of concrete penetrated by rigid project with coupled FE-SPH methods[J].Journal of National University of Defense Technology,2003(6):87-90.(in Chinese)
[16]王永安,祁顺彬.钢筋混凝土压力管道的断裂力学分析[J].建筑技术开发,2005,32(11):76-77.[16]WANG Yong-an,QI Shun-bin.Fracture mechanics analysis of reinforced concrete pressure pipe[J].Building Technique Development,2005,32(11):76-77.(in Chinese)
[17]于骁中.岩石和混凝土断裂力学[M].长沙:中南工业大学出版社,1991.
[18]蒋楠,周传波,罗钢,等.铁路隧道混凝土衬砌爆破振动安全判据[J].中南大学学报(自然科学版),2012(7):2746-2750.[18]JIANG Nan,ZHOU Chuan-bo,LUO Gang,et al.Blasting vibration safety criterion of railway tunnel concrete lining[J].Journal of Central South University(Science and Technology),2012(7):2746-2750.(in Chinese)
[2]刘学通.爆破振动下埋地天然气管道的动力响应研究[D].成都:西南交通大学建筑与土木工程,2015.[2]LIU Xue-tong.Dynamic response study of buried gad pipeline under the action of blasting vibration[D].Chengdu:Southwest Jiaotong University,2015.(in Chinese)
[3]NEWMARK N M,HALL W J.Pipeline design to resist large fault displacement[C]∥Proceeding of First USConference on Earthquake Engineering.Amm Arbor,1975:416-425.
[4]HINDY A,NOVAK M.Pipeline response to random ground motion[J].Journal of the Engineering Mechanics Division,1980,106(2):339-360.
[5]都的箭,刘志杰,马书广.埋地管线在爆炸地冲击作用下的数值模拟[J].地下空间与工程学报,2007,3(1):181-186.[5]DU De-jian,LIU Zhi-jie,MA Shu-guang.Numerical simulation for dynamical stress of buried pipeline under explosion ground shock wave[J].Chinese Journal of Underground Space and Engineering,2007,3(1):181-186.(in Chinese)
[6]姚安林,赵师平,么惠全,等.地下爆炸对埋地输气管道冲击响应的数值分析[J].西南石油大学学报(自然科学版),2009,31(4):168-172.[6]YAO An-lin,ZHAO Shi-ping,YAO Hui-quan,et al.Numerical simulation of response of underground explosion ground shock to buried gas pipeline[J].Journal of Southwest Petroleum University(Science&Technology Edition),2009,31(4):168-172.(in Chinese)
[7]郑爽英,杨立中.隧道爆破地震下输气管道动力响应数值试验[J].西南交通大学学报,2017,52(2):264-271.[7]ZHENG Shuang-ying,YANG Li-zhong.Numerical experiments of dynamic response of buried gas pipeline under the action of seismic waves induced by tunnel blasting[J].Journal of Southwest Jiao Tong University,2017,52(2):264-271.(in Chinese)
[8]王晓鹏,王海亮.浅埋隧道下穿高压给水管道微振动控制研究[J].山东科技大学学报(自然科学版),2016(3):61-66.[8]WANG XIAO-Peng,WANG Hai-Liang.Study on micro-vibration blasting control for shallow tunnel crossing underneath high pressure water supply pipelines[J].Journal of Shandong University of Science and Technology,2016(3):61-66.(in Chinese)
[9]邵煜.埋地管道的失效机理及其可靠性研究[D].杭州:浙江大学,2008.[9]SHAO Yu.Study on the failure mechanism and reliability evaluation of buried pipelines[D].Hangzhou:Zhe Jiang University,2008.(in Chinese)
[10]常向阳,王自力.爆炸成型弹丸侵彻钢靶的ALE算法[J].解放军理工大学学报(自然科学版),2004(3):70-73.[10]CHANG Xiang-yang,WANG Zi-li.Numerical simulation of EFP penetrating steel target with ALE method[J].Journal of PLA University of Science and Technology,2004(3):70-73.(in Chinese)
[11]冯卫民,宋立,肖光宇.基于ADINA的压力管道流固耦合分析[J].武汉大学学报(工学版),2009(2):264-267.[11]FENG Wei-min,SONG Li,XIAO Guang-yu.Coupling analysis of fluid-structure interaction in pressure pipes based on ADINA[J].Engineering Journal of Wuhan U-niversity,2009(2):264-267.(in Chinese)
[12]李晓勇,崔村燕,陈景鹏,等.LS-DYNA软件开展爆炸冲击波计算时需考虑的问题[J].装备学院学报,2014(4):79-84.[12]LI Xiao-yong,CUI Cun-Yan,CHEN Jing-peng,et al.Several consideration when calculating the blasting wave using LS-DYNA[J].Journal of Equipment Academy,2014(4):79-84.(in Chinese)
[13]赵铮,陶钢,杜长星.爆轰产物JWL状态方程应用研究[J].高压物理学报,2009(4):277-282.[13]ZHAO Zheng,TAO Gang,DU Chang-xing.Application research on JWL equation of state of detonation products[J].Chinese Journal of High Pressure Physics,2009(4):277-282.(in Chinese)
[14]蒋楠,周传波.爆破振动作用下既有铁路隧道结构动力响应特性[J].中国铁道科学,2011(6):63-68.[14]JIANG Nan,ZHOU Chuan-bo.Dynamic response characteristics of existing railway tunnel structure subjected to blasting vibration[J].China Railway Science,2011(6):63-68.(in Chinese)
[15]蔡清裕,崔伟峰,向东,等.模拟刚性动能弹丸侵彻混凝土的FE-SPH方法[J].国防科技大学学报,2003(6):87-90.[15]CAI Qing-yu,CUI Wei-feng,XIANG Dong,et al.Simulation of concrete penetrated by rigid project with coupled FE-SPH methods[J].Journal of National University of Defense Technology,2003(6):87-90.(in Chinese)
[16]王永安,祁顺彬.钢筋混凝土压力管道的断裂力学分析[J].建筑技术开发,2005,32(11):76-77.[16]WANG Yong-an,QI Shun-bin.Fracture mechanics analysis of reinforced concrete pressure pipe[J].Building Technique Development,2005,32(11):76-77.(in Chinese)
[17]于骁中.岩石和混凝土断裂力学[M].长沙:中南工业大学出版社,1991.
[18]蒋楠,周传波,罗钢,等.铁路隧道混凝土衬砌爆破振动安全判据[J].中南大学学报(自然科学版),2012(7):2746-2750.[18]JIANG Nan,ZHOU Chuan-bo,LUO Gang,et al.Blasting vibration safety criterion of railway tunnel concrete lining[J].Journal of Central South University(Science and Technology),2012(7):2746-2750.(in Chinese)