隧道爆破作用下邻近输油管道安全距离  

Safety Distance of Adjacent Oil Pipelines under the Action of Tunnel Blasting

作　　者：张雨晨 王海亮[1] 石晨晨 丁新宇 赵军 ZHANG Yu-chen;WANG Hai-liang;SHI Chen-chen;DING Xin-yu;ZHAO Jun(College of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Chengdu New Technology Blasting Engineering Co.,Ltd.,China Railway No.2 Group,Chengdu 610000,China;China Railway Blasting Safety Technology R&D Center,Chengdu 610000,China)

机构地区：[1]山东科技大学安全与环境工程学院,青岛266590 [2]中铁二局集团成都新技术爆破工程有限公司,成都610000 [3]中国中铁爆破安全技术研发中心,成都610000

出　　处：《科学技术与工程》2023年第5期1903-1911,共9页Science Technology and Engineering

基　　金：国家自然科学基金(10672091)。

摘　　要：为了避免隧道爆破施工时邻近地表及地下输油管道受到爆破振动造成的不良影响,需确保爆破施工工作面与输油管道保持一定安全距离。基于青岛胶州湾第二海底隧道黄岛端斜井工程,通过对斜井一期工程隧道爆破施工引起的地表振动进行监测,研究了工作面前方地表振速的衰减规律,并采用Hilbert-Huang变换及小波包分析了爆破振动频域特征。结果表明:在距工作面0~40 m的高振速区范围内,振速呈现震荡变化,峰值合振速出现在距工作面一定距离的地表区域,而在高振速区之外部分呈指数衰减趋势;爆破振动的频域分布主要集中在0~200 Hz的低频区域,50 Hz左右为其最集中区域,瞬时能量峰值出现在0~1 s内,其中在0~25 Hz范围内能量占比最高为13.41%,与输油管道自振频率范围存在部分重叠。同时,引入萨道夫斯基修正公式并拟合出适用于本工程条件下的振速预测公式模型,从法律规范、工程实践及抗震能力3个方面考虑提出输油管道安全振速为1 cm/s,计算得到50 m范围内最大单段齐爆药量和安全距离之间的关系,为后续斜井二期工程下穿输油管道区域时的爆破方案优化提供参考。In order to avoid the adverse impact of blasting vibration on the adjacent surface and underground oil pipeline during tunnel blasting construction,it is necessary to ensure that the blasting construction face is kept at a safe distance from the oil pipeline.Based on the inclined shaft project at Huangdao end of Qingdao Jiaozhou Bay Second Submarine Tunnel,the surface vibration caused by the blasting construction of the first phase of inclined shaft project was monitored.The attenuation law of ground vibration velocity in front of the working face was studied,and the frequency domain characteristics of blasting vibration were analyzed by Hilbert-Huang transform and wavelet packet.The results show that the vibration velocity in the range of 0~40 m away from the working face presents a tendency of vibration variation.The peak combined vibration velocity appears in the surface area at a certain distance from the working face,while the part outside the high vibration velocity area shows an exponential attenuation trend.The frequency domain distribution of blasting vibration is mainly concentrated in the low frequency area of 0~200 Hz,and about 50 Hz is the most concentrated area.Instantaneous energy peak appears within 0~1 s.Among them,the energy accounts for 13.41%at most in the range of 0~25 Hz,which is partially overlapped with the natural frequency range of oil pipeline.At the same time,Sadovsky’s modified formula is introduced and the vibration velocity prediction formula model applicable to the conditions of the Project is fitted.Considering the legal norms,engineering practice and seismic capacity,it is proposed that the safety vibration velocity of the oil pipeline is 1 cm/s,and the relationship between the maximum single section homogeneous explosive quantity and the safety distance within the range of 50 m is calculated,which provides a reference for the blasting scheme optimization when the following Phase II inclined shaft project passes through the oil pipeline area.

关 键 词：隧道 爆破 输油管道 振速 频域 安全距离 

分 类 号：TD235[矿业工程—矿井建设]