To investigate and determine the effect of open excavation blasting on the dynamic characteristics of existing tunnel structure is the prerequisite for designing a scientific and reasonable controlled cutting blast scheme. Thus, in combination with the utilization of cutting blast in the open excavation segment of Yalimak tunnel, which adjacent to the top of the existing small-distance tunnel, the vibration characteristics of the existing tunnel structure during blasting were investigated by numerical simulation and field tests. The numerical simulation results indicate that the vertical PPV( Particle Peak Vibration ) on the lining of existing tunnel is higher than the horizontal PPV and plays a major role in blasting vibration control as open excavation blasting is performed. The vertical PPV on the spandrel of right existing tunnel closer to the blasting source is highest and increases obviously with the maximum charge per delay increasing. Von-Mises stress on the existing tunnel approximately follows a linear relationship with the vertical PPV, the dynamic safety factor of existing tunnel structure is 2.0 when the control value of safety vibration velocity is set to 4.5cm/s. According to the field tests results numerical simulation has been proved correct and can be utilized to guide the design of open excavation cutting blast as well as vibration measurement effectively. Moreover, the predication formula, which could be used to determine and further optimize the maximum charge per delay, has been obtained by means of regression analysis.
邹新宽 1, 张继春1, 潘强1, 葛竟辉2. 隧道明挖段拉槽爆破时既有隧道结构动力响应特性[J]. 振动与冲击, 2015, 34(19): 203-207.
Zou Xin-kuan1, Zhang Jichun1, Pan Qiang1,Ge Jinghui2. Dynamic response characteristics of existing tunnel structure induced by cutting blast utilized in open excavation. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(19): 203-207.
[1] 张继春，曹孝君，郑爽英，等. 浅埋隧道掘进爆破的地表震动效应试验研究[J]. 岩石力学与工程学报，2005,24(22):4158－4163.
ZHANG Jichun, CAO Xiaojun, ZHENG Shuangyin, et al. Experimental study on vibration effects of ground due to shallow tunnel blasting[J]. Chinese Journal of Rock Mechanics and Engineering, 2005,24(22):4158－4163.
[2] 叶培旭，杨新安， 凌保林，等. 近距离交叉隧洞爆破对既有隧道的振动影响[J]. 岩土力学，2011,32(2):537－541.
YE Peixu, YANG Xinan, LING Baolin, et al. Vibration effects on existing tunnel induced by blasting of an adjacent cross tunnel[J]. Rock and Soil Mechanics, 2011,32(2):537－541.
[3] R. Resende , L. Lamas, J. Lemos, et al. Stress wave propagation test and numerical modelling of an underground complex[J]. International Journal of Rock Mechanics & Mining Sciences, 2014,72:26－36.
[4] 管晓明，傅洪贤，王梦恕. 隧道近距下穿山坡楼房爆破振动测试研究[J]. 岩土力学，2014,35(7):1995－2003.
GUAN Xiaoming，FU Hongxian，WANG Mengshu. Blasting vibration characteristics monitoring of tunnel under－passing hillside buildings in short－distance[J]. Rock and Soil Mechanics, 2014,35(7):1995－2003.
[5] 杨年华, 张志毅. 隧道爆破振动控制技术研究[J]. 铁道工程学报, 2010, (1): 82－86.
YANG Nian－hua, ZHANG Zhi－yi. Research on the control technology for tunnel blasting vibration[J]. Journal of Railway Engineering Society, 2010, (1): 82－86.
[6] 朱正国，孙明路，朱永全，等. 超小净距隧道爆破振动现场监测及动力响应分析研究[J]. 岩土力学，2012,33(12):3747－3753.
ZHU Zhengguo , SUN Minglu , ZHU Yongquan , et al. Field monitoring on blasting vibration and dynamic response of ultra－small spacing tunnels[J]. Rock and Soil Mechanics, 2012,33(12):3747－3753.
[7] 曹孝君，张继春，吕和林，等. 浅埋隧道掘进爆破地表震动效应数值模拟[J]. 西南交通大学学报，2006, 41(6):680－684.
CAO Xiaojun, ZHANG Jichun, LV Helin, et al. Numerical simulation of ground vibration effects in shallow tunneling blasting [J]. Journal of Southwest Jiaotong University, 2006, 41(6): 680－684.
[8] 姚强，杨兴国，陈兴泽，等. 大型地下厂房爆破振动动力响应数值模拟[J]. 振动与冲击，2014,33(6):66－70.
YAO Qiang, YANG Xingguo, CHEN Xingze, et al. Numerical simulation of dynamic response of large underground powerhouse subjected to blasting vibration[J]. Journal of Vibration and Shock, 2014, 33(6):66－70.
[9] 汪波，何川，夏炜洋. 爆破施工新建地铁隧道与既有运营地铁的相互动力响应研究[J]. 中国铁道科学，2011,32(5):64－70.
WANG Bo, HE Chuan, XIA Weiyang. Study on the interactive dynamic response between the New－Built tunnel by blasting construction and the existing operation subway tunnel[J]. China Railway Science, 2011,32(5):64－70.
[10] 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），43(7):2746－2750.
JIANG Nan , ZHOU Chuanbo , LUO Gang , et al. Blasting vibration safety criterion of railway tunnel concrete lining[J]. Journal of Central South University (Science and Technology), 43(7):2746－2750.
[11] GB 6722—2003, 爆破安全规程[S].
GB 6722—2003, Safety regulations for blasting[S].
[12] JTJ 004－89, 公路工程抗震设计规范[S].
JTJ004－89, Specification for railway tunnel design TB10003－2005[S].
[13] JTGT D70—2010, 公路隧道设计规范[S].
JTGT D70—2010, Code for Design of Road Tunnel[S].
