铁路小间距隧道洞口段爆破施工震动响应研究
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摘要
以重庆至怀化线增建工程中的复线隧道为研究对象,对小间距铁路隧道复线洞口段爆破开挖产生的动力效应进行了数值模拟,给出了爆破开挖在既有洞室洞口周边产生的动力效应的一般规律。研究结果表明:加强对敏感部位监控、采用合理爆破参数可有效减轻爆破应力波对既有隧道洞口段的不利影响。
Taking the double-track railway tunnel on Chongqing-Huaihua railway as the background,numerical simulation was carried out to study the blasting vibration effect on the portal section of closely-spaced tunnels.General regulations of dynamic effects caused by blasting excavation on the existing tunnel perimeter were acquired.Results of the study indicated that unfavorable influence of blasting waves on the portal section could be alleviated by enforcing the monitor for sensible parts and by reasonable selection of blasting parameters.
Taking the double-track railway tunnel on Chongqing-Huaihua railway as the background,numerical simulation was carried out to study the blasting vibration effect on the portal section of closely-spaced tunnels.General regulations of dynamic effects caused by blasting excavation on the existing tunnel perimeter were acquired.Results of the study indicated that unfavorable influence of blasting waves on the portal section could be alleviated by enforcing the monitor for sensible parts and by reasonable selection of blasting parameters.
引文
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[2]喻胜春,朱传云,苏大强.爆破震动荷载作用下墩体结构的动态分析[J].西部探矿工程,2001,(1):79~82Yu Shengchun,Zhu Chuanyun,Su Daqiang.Dynamic Analysis of Responses of Rock Wall to Blasting Vibration Loads[J].West-china Exploration Engineering,2001,(1):79~82
[3]李启发.爆破地震波对岩质边坡稳定性的影响[J].爆破,1995,1~8Li Qifa.The Effect of Detonating on the Stability of a Rocky Slope[J],Blasting,1995,1~8
[4]Lysmer J,Kuhlemeyer RL.Finite Dynamic Model for Infinite Media[J].J.ASCE,Eng,Mech.Div.1969,95(4):857~877
[5]周维垣.高等岩石力学[M].北京:水力电力出版社,1991Zhou Weiyuan.Advanced Rock Mechanics[M].Beijing:Hydraulic and Electric Press,1991
[6]刘国华,王振宇.爆破荷载作用下隧道的动态响应与抗爆分析[J].浙江大学学报(工学版),2004,(2):204~208Liu Guohua,Wang Zhenyu.Dynamic Response and Blast-resistance Analysis of a Tunnel Subjected to Blast Loading[J].Journal ofZhejiang University(Engineering Science),2004,(2):204~208
[7]HSN YU LOW,HONG HAO.Reliability Analysis of Reinforced Concrete Slabs under Explosive Loading[J].Structural Safety,2001,23:157~178
[8]赵东平,王明年.小净距交叉隧道爆破震动响应研究[J].岩土工程学报,2007,(1):116~119Zhao Dongping,Wang Mingnian.Study on Influence of Blasting Vibration on Cross Tunnels with Small Clearance[J].ChineseJournal of Geotechnical Engineering,2007,(1):116~119
[9]姚勇,何川,晏启祥,李玉文.董家山隧道小净距段爆破控制的数值模拟[J].岩土力学,2004,(25):501~506Yao Yong,He Chuan,Yan Qixiang,Li Yuwen.Numerical Simulation of Blasting Control for Small Clear Distance Zone ofDongjiashan Tunnel[J].Rock and Soil Mechanics,2004,(25):501~506
[10]雷明峰,张运良,彭立敏.城市小间距交通隧道爆破安全监测及结果分析[J].现代隧道技术,2007,44(1):61~64Lei Mingfeng,Zhang Yunliang,Peng Limin.Blasting Monitoring and Analyses for Urban Traffic Tunnels with Small Spacing[J].Modern Tunnelling Technology,2007,44(1):61~64
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