Blast vibration characteristics of transition segment of a branch tunnel

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (2) : 43-50.

LING Tong-hua1，CAO Feng1,2，ZHANG Sheng3，ZHANG Liang1，GU Dan-ping1

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Abstract

Due to a special structure of transition segment of a branch tunnel, its blast induced vibration is easy to cause middle wall and rock body unstable. Taking Liuyuetian Branch Tunnel transition segment as the engineering background, the blast vibration of its early excavated tunnel part was constantly monitored. By analyzing the blast vibration data, the propagation laws of vibration wave of the early excavated tunnel part under the conditions of different surrounding rock grades and different monitoring positions were obtained. The mechanical characteristics of the concrete lining of the early excavated tunnel part were studied under the action of blast vibration of lately excavated tunnel parts with 3-D numerical simulation software. The results showed that the maximum radial vibration velocity appears at the near-blast side of middle wall in multi-arch segment; the attenuation level of vibration velocity of middle inclusion rock in small distance segments is less than that of middle wall in multi-arch segment; the maximum tensile stress and shear one of concrete lining of the early excavated tunnel part produced due to blast vibration occur at haunch and skewback of near-blast side, respectively; the relationship between the maximum tensile stress and the maximum vibration velocity of concrete lining of the lately excavated tunnel part is linear; the critical vibration velocity is obtained with a fitted formula, the safety control standard for blast vibration of transition segment of a branch tunnel is established.

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branch tunnel / transition segment / blasting monitoring / vibration characteristics / numerical simulation

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LING Tong-hua1，CAO Feng1,2，ZHANG Sheng3，ZHANG Liang1，GU Dan-ping1. Blast vibration characteristics of transition segment of a branch tunnel[J]. Journal of Vibration and Shock, 2018, 37(2): 43-50

References

[1] 毕强，吴金刚. 大跨分岔式隧道结构设计关键技术研究[J].隧道建设,2011,31(6):668-677.
Bi Qiang,Wu Jing-gang.Study on key technologies for structural design of large-span forked tunnel[J].Tunnel Construction，2011,31(6):668-677.
[2] 王者超，李术才，陈卫忠.分岔隧道变形监测与施工对策研究[J].岩土力学，2007,28(4):785-789.
WANG Zhe-chao,LI Shu-cai,CHEN Wei-zhong. Deformation monitoring of bifurcation tunnel and countermeasures of construction technologies[J].Rock and Soil Mechanics，2007,28(4):785-789.
[3] 蔚立元，李术才，郭小红，等.分岔隧道过渡段稳定性研究[J].中国公路学报,2011,24(1):89-95.
YU Li-yuan,LI Shu-cai,GUO Xiao-hong, et al. Study of stability of transition scgmcnt for bifurcation tunnel[J]. China Journal of Highway and Transport, 2011,2(1) 89-95.
[4] 时亚昕，王明年，李强. 爆破振动对双连拱隧道中墙的影响分析[J].岩土力学，2007，28(6):1275-1279.
SHI Ya-xin,WANG Ming-nian,LI Qiang. Analysis of influence of blasting vibration on middle wall of a double-arch tunnel.[J]. Rock and Soil Mechanics, 2007，28(6):1275-1279.
[5] 贾磊，解咏平，李慎奎. 爆破振动对邻近隧道衬砌安全的数值模拟分析[J]. 振动与冲击，2015, 33(11): 173-177，211.
JIA Lei,XIE Yong-ping,LI Shen-kui.Numerical simulation for impact of blasting vibration on nearby tunnel lining safety.[J].Journal of vibration and shock,2015,33(11): 173-177，211.
[6] 林从谋,陈礼彪,蒋丽丽,等.高速公路扩建大断面特小净距隧道爆破稳定控制技术研究[J].岩石力学与工程学报,2010, 29(7): 1371-1378.
LIN Cong-mou,CHEN Li-biao,JIANG Li-li,et al.Research on blasting stability control technology of large-span highway with super-small clear spacing highway expansion project[J]. Journal of Rock Mechanics and Engineering, 2010, 29(7):1371-1378.
[7] 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):3747-3752.
ZHU Zheng-guo,SUN Ming-lu,ZHU Yong-quan,et al. Field monitoring on blasting vibration and dynamic response of ultra-small spacing tunnels[J]. Rock and Soil Mechanics, 2012, 33(12): 3747-3752.
[8] 李新平,陈俊桦,李友华,等.溪洛渡电站地下洞室群爆破地震效应的研究[J].岩石力学与工程学报,2010, 29(3):493-501.
LI Xin-ping,CHEN Jun-hua,LI You-hua,et al.Study of blasting seismic effects of underground chamber group in xiluodu hydropower station [J]. Journal of Rock Mechanics and Engineering, 2012, 29(3): 493-501.
[9] 姚强,杨兴国,陈兴泽,等，大型地下厂房开挖爆破振动动力响应数值模拟[J].振动与冲击,2014,33(6):66-70,76.
YAO Qiang,YANG Xing-guo,CHEN Xing-ze,et al. Numerical simulation of dynamic response of large underground powerhouse subjected to blasting vibration [J].Journal of vibration and shock,2014,33(6):66-70,76.
[10] LANGEFORS U，KIHLSTROM B. The modem technique of rock blasting[M].New York：[s.n.],1973.
[11] 李云鹏,艾传志,韩常领,等.小间距隧道爆破开挖动力效应数值模拟研究[J].爆炸与冲击,2007,27(1): 75-81.
Li Yun-peng,Ai Chuan-zhi, Han Chang-ling, et al. Study on dynamics effect caused byblasting construction by numerical simulation for tunnels with small spacing[J]. Explosion and Shock Waves, 2007, 27(1): 75-81.
[12] 中华人民共和国国家标准编写组.GB6722-2014.爆破安全规程[S].北京：中国标准出版社，2014.
The National Standards Compilation Group of People’s Republic of China.GB6722-2014 Safety regulations for blasting[S].Bei jing:Standards Press of China.2014.
[13] 杨年华,刘慧.近距离爆破引起的隧道周边振动场[J].工程爆破，2000，6(2)：6–10.
YANG Nian-hua, LIU Hui. Vibration field at tunnel contour induced by a close-in blasting[J].Engineering Blasting，2000，6(2)：6–10.
[14] 张庆松,李利平,李术才,等.小间距隧道爆破动力特性试验研究[J].岩土力学，2008, 29(10): 2655-2660.
ZHANG Qing-song, LI Li-ping, LI Shu-cai, et al. Experimental study of blasting dynamic vibration of closely adjacent tunnels[J].Rock and Soil Mechanics, 2008, 29(10): 2655-2660.
[15] LSTC.LS-DYNA Keyoword user’s manual[M].Livermore：Livermore Software Technology Corporation,2007.
[16] YANG R,BAWDEN WF,KATSABANIS P D.A New Constitutive model for blast damage[J].International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts,1996,33(3):345-354.
[17] 湖南省交通规划勘察设计院.湖南省永顺至吉首高速公路第2合同段六月田隧道详细工程地质勘察报告[R].长沙，湖南省交通规划勘察设计院，2012.
Hunan provincial communications planning,survey & design institute. Yongshun to jishou in hunan province highway tunnel contract period of liuyuetian 2 detailed engineering geological investigation report. [R].changsha: Hunan provincial communications planning,survey & design institute.2012.
[18] 杨国梁，杨仁树，车玉龙. 周期性爆破振动下围岩的损伤累积效应[J].煤炭学报，2013,38(S1):25-29.
YANG Guo-liang，YANG Ren-shu，CHE Yu-long. Damage accumulative effect of surrounding rock under periodic blasting vibration[J].Journal of China Coal Society，2013,38(S1):25-29.
[19] 重庆交通科研设计院.JTGD70-2004.公路隧道设计规范[S].北京：人民交通出版社，2004.
Chongqing communications research & design institute. JTGD70-2004.Code for design of road tunnel[S]. Bei jing:China communications press.2004.
[20] 胡英国,卢文波,陈明,等，岩体爆破近区临界损伤质点峰值震动速度的确定[J].爆炸与冲击,2015,35(4):547-554.
HU Ying-guo,LU Wen-bo,CHEN Ming,et al. Determination of critical damage PPV near the blast hole of rock-mass[J]. Explosion and Shock Waves, 2015, 34(4): 547-554.
[21] 江见鲸，冯乃谦.混凝土力学[M].北京：科学出版社，1991.