桥梁桩基爆破施工对邻近埋地天然气管线的影响

摘要

The influence of blasting vibration induced by the bridge pile foundation construction on adjacent buried pipelines can't be ignored. According to blasting construction of bridge pile foundation located in Zhangjiakou-Shijiazhuang highway, the propagating regulation of vibration wave induced by blasting and influence of blasting vibration on adjacent buried gas pipelines were systematically studied by field test.The results show that it is necessary for quantity of one section explosive to be adjusted timely with the depth of pile foundation increasing; the interval time of millisecond blasting can regulate vibration velocity of blasting; the frequency of vibration wave had very little effect on buried gas pipeline. The research results provide reference and basis for the construction and design of similar project.%桥梁桩基爆破施工对邻近埋地管道的振动影响不容忽视.结合张石高速公路桥梁桩基爆破工程,通过现场试验较系统地研究了爆破振动波的传播规律及对邻近埋地天然气管线安全的影响.结果表明:单段药量随着桩基深度的增加需要适时调整,延时时间可调控爆破振动速度;爆破振动波频率对埋地管道的影响很小.研究结果为实际工程的施工和设计提供了参考和依据.