轻轨隧道下穿建筑物爆破震动试验研究
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摘要
以重庆轨道交通环线体育公园站浅埋轻轨隧道工程为研究背景,进行了施工通道钻爆循环掘进下穿"两江春城"的爆破震动效应试验。在钻爆初期,通过监测参数计算出爆破振动衰减参数,并通过测量轻轨隧道下穿建筑物时,爆破引起的建筑物不同楼层处的振动速度波形,探讨建筑物的震动特性及爆破地震波传播和衰减规律。研究发现,其爆破振动衰减参数为=1.88,k=99.43;浅埋轻轨隧道钻爆掘进过程中,其垂直方向的爆破振速明显大于水平方向的,因此在研究爆破振动传播和衰减规律及其对建筑物振动的影响时,主要以垂直方向的爆破振速为依据;建筑物的爆破振速在底层随着楼层的增加而增大,中层随着楼层的增加而减小,顶层又随着楼层的增加而增大,而不是随楼层的增加而减小,即不满足传统萨道夫斯基衰减规律。同时测得轻轨隧道下穿建筑物后的爆破振速相比下穿前的,存在放大效应,其放大倍数约为1.32~1.69。
Taking the shallow light rail tunnel project of Sports Park Station in Chongqing rail transit circle as the research background, made blasting vibration effect experiments of construction channel blasting and drilling excavation undercrossing" Two Rivers Spring City". In the early drilling and blasting, calculated the blasting vibration attenuation parameters by monitoring parameters,and through measuring the blasting caused vibration velocity waveforms of different building floors at the light rail tunnel undercrossing buildings, studied the building vibration characteristics as well as the blasting seismic wave propagation and attenuation laws. The research found that the blasting vibration attenuation parameters were =1.88 and k=99.43, and in the process of shallow buried light rail tunnel drilling and blasting excavation,the blasting vibration velocity of the vertical direction is significantly greater than that of horizontal direction,so the study of blasting vibration propagation and attenuation laws as well as the influences of vibration on buildings are premised on the blasting vibration velocity in vertical direction; The blasting vibration velocity increased with the increment of floors at the bottom, decreased with the increment in the middle and increased again with the increment at the top, it did not decrease with the increase of the building floors, which did not meet traditional Steve sadove's attenuation law. Meanwhile compared the measured blasting vibration velocity before and after light rail tunnel undercrossing buildings, the later exists blasting vibration amplification effect and the magnification is about 1.32~1.69 times.
Taking the shallow light rail tunnel project of Sports Park Station in Chongqing rail transit circle as the research background, made blasting vibration effect experiments of construction channel blasting and drilling excavation undercrossing" Two Rivers Spring City". In the early drilling and blasting, calculated the blasting vibration attenuation parameters by monitoring parameters,and through measuring the blasting caused vibration velocity waveforms of different building floors at the light rail tunnel undercrossing buildings, studied the building vibration characteristics as well as the blasting seismic wave propagation and attenuation laws. The research found that the blasting vibration attenuation parameters were =1.88 and k=99.43, and in the process of shallow buried light rail tunnel drilling and blasting excavation,the blasting vibration velocity of the vertical direction is significantly greater than that of horizontal direction,so the study of blasting vibration propagation and attenuation laws as well as the influences of vibration on buildings are premised on the blasting vibration velocity in vertical direction; The blasting vibration velocity increased with the increment of floors at the bottom, decreased with the increment in the middle and increased again with the increment at the top, it did not decrease with the increase of the building floors, which did not meet traditional Steve sadove's attenuation law. Meanwhile compared the measured blasting vibration velocity before and after light rail tunnel undercrossing buildings, the later exists blasting vibration amplification effect and the magnification is about 1.32~1.69 times.
引文
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[11]张建波,杨新安,何知思.浅埋隧道下穿建筑物爆破振动规律及控制研究[J].华东交通大学学报,2014,31(1):17-22.Zhang Jianbo,Yang Xin’an,He Zhisi.Blasting Vibration Rule and Control of Shallow Tunnel Undercrossing Buildings[J].Journal of East China Jiaotong University,2014,31(1):17-22.
[12]郭建群,张继春,曹孝君,等.穿越高楼下的浅埋隧道掘进控制爆破技术[J].爆破,2003,20(1):28-30,38.Guo Jianqun,Zhang Jichun,Cao Xiaojun,et al.Controlled Blasting Technique for Excavation of the Shallow Tunnel Under High Buildings[J].Blasting,2003,20(1):28-30,38.
[13]唐海,李海波.反映高程放大效应的爆破振动公式研究[J].岩土力学,2011,32(3):820-824.Tang Hai,Li Haibo.Study of Blasting Vibration Formula of Reflecting Amplification Effect on Elevation[J].Rock and Soil Mechanics,2011,32(3):820-824.
[2]高尔新,杨树仁.爆破工程[M].徐州:中国矿业大学出版社,1999:242-256.Gao Erxin,Yang Shuren.The Blasting Engineering[M].Xuzhou:China University of Mining and Technology Press,1999:242-256.
[3]言志信,王后峪.爆破地震效应及安全[M].北京:科学出版社,2001:1-2.Yan Zhixin,Wang Houyu.Blasting Seismic Effect and Safety[M].Beijing:Science Press,2001:1-2.
[4]吕涛,石永强,黄诚,等.非线性回归法求解爆破振动速度衰减公式参数[J].岩土力学,2007,28(9):1871-1878.L Tao,Shi Yongqiang,Huang Cheng,et al.Study on Attenuation Parameters of Blasting Vibration by Nonlinear Regression Analysis[J].Rock and Soil Mechanics,2007,28(9):1871-1878.
[5]张世雄,杨明亮,尹家国,等.预测爆破波振动强度的经验公式及其在采矿中的应用[J].爆破,2000,17(3):13-17.Zhang Shixiong,Yang Mingliang,Yin Jiaguo,et al.An Empirical Formula of Calculating the Vibrating Intensity of Explosive Wave and Its Application in Mining[J].Blasting,2000,17(3):13-17.
[6]张继春,彭琼芳.岩体爆破地震波衰减规律的现场试验与分析[J].辽宁工程技术大学学报:自然科学版,2001,20(4):399-401.Zhang Jichun,Peng Qiongfang.Field Experiment and Its Analyses of Attenuation Law for Seismic Waves Resulting from Rock Blasting[J].Journal of Liaoning Technical University:Natural Science Edition,2001,20(4):399-401.
[7]张天军,马锐,乔宝明,等.爆破震动中萨道夫斯基拓展式的回归分析[J].湖南科技大学学报:自然科学版,2012,27(1):11-16.Zhang Tianjun,Ma Rui,Qiao Baoming,et al.The Regression Analysis of Extended Sodev Type in Blasting Vibration[J].Journal of Hunan University of Science&Technology:Natural Science Edition,2012,27(1):11-16.
[8]朱振海,杨永琪.沟槽对建筑物减震作用的动光弹研究[J].爆破与冲击,1989,9(1):55-60.Zhu Zhenhai,Yang Yongqi.Dynamic Photoelastic Studies of the Vibration Damping by a Slop Near a Structure[J].Explosion and Shock Waves,1989,9(1):55-60.
[9]魏晓林.爆破震动对邻近建筑物的危害影响[J].爆破,1998,15(1):48-54.Wei Xiaolin.Study on Destructive Effect of Blasting Near Building[J].Blasting,1998,15(1):48-54.
[10]王俊平,陈宝心.爆破地震波作用下建筑物的动力响应分析方法[J].西部探矿工程,2005,134(9):134-137.Wang Junping,Chen Baoxin.Analysis Method of Dynamic Response of Building Under Blasting Seismic Wave[J].WestChina Exploration Engineering,2005,134(9):134-137.
[11]张建波,杨新安,何知思.浅埋隧道下穿建筑物爆破振动规律及控制研究[J].华东交通大学学报,2014,31(1):17-22.Zhang Jianbo,Yang Xin’an,He Zhisi.Blasting Vibration Rule and Control of Shallow Tunnel Undercrossing Buildings[J].Journal of East China Jiaotong University,2014,31(1):17-22.
[12]郭建群,张继春,曹孝君,等.穿越高楼下的浅埋隧道掘进控制爆破技术[J].爆破,2003,20(1):28-30,38.Guo Jianqun,Zhang Jichun,Cao Xiaojun,et al.Controlled Blasting Technique for Excavation of the Shallow Tunnel Under High Buildings[J].Blasting,2003,20(1):28-30,38.
[13]唐海,李海波.反映高程放大效应的爆破振动公式研究[J].岩土力学,2011,32(3):820-824.Tang Hai,Li Haibo.Study of Blasting Vibration Formula of Reflecting Amplification Effect on Elevation[J].Rock and Soil Mechanics,2011,32(3):820-824.
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