轻轨隧道下穿建筑物爆破震动试验研究  被引量:5

Experimental Study on Blasting Vibration of Light Rail Tunnel Undercrossing Buildings

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作  者:王辉[1] 阳生权[1] 常中民 丁雄[1] 赵磊军 

机构地区:[1]湖南科技大学土木工程学院,湖南湘潭411201 [2]中铁十六局集团第三工程有限公司,湖州浙江313000

出  处:《湖南工业大学学报》2014年第6期17-22,共6页Journal of Hunan University of Technology

基  金:湖南省高校产业化培育基金资助项目(13CY013);地方级基金资助项目(201443030400184)

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.

关 键 词:爆破震动 震动特性 衰减规律 放大效应 爆破振速 

分 类 号:U455.32[建筑科学—桥梁与隧道工程]

 

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