爆破振动对埋地输油管道影响的数值模拟  

Numerical simulation of the influence of blasting vibration on buried oil pipeline

作　　者：高文乐 闫振伟 李元振 张泽华 冯娜 GAO Wenle;YAN Zhenwei;LI Yuanzhen;ZHANG Zehua;FENG Na(College of Civil Engineering and Architecture,Shandong University of Science and Technology;College of Pipeline and Civil Engineering,China University of Petroleum(East China))

机构地区：[1]山东科技大学土木工程与建筑学院 [2]中国石油大学(华东)储运与建筑工程学院

出　　处：《油气储运》2021年第4期391-396,423,共7页Oil & Gas Storage and Transportation

基　　金：国家自然科学基金资助项目“深部高应力岩巷掏槽爆破破岩过程与机理研究”,51874189。

摘　　要：为了确保埋地输油管道在爆破施工过程中的安全,结合邻近埋地输油管道的烟台港西港区疏港大道土石方爆破工程,利用ANSYS/LS-DYNA流固耦合方法模拟爆破振动对管道的影响。基于数值模拟,分别统计管道不同断面、断面正上方地表的最大振动速度,通过最小二乘法对所得数据进行分析研究。结果表明:基于流固耦合方法模拟得到的振速与现场实测结果基本一致,利用该模拟方法研究爆破振动对埋地输油管道的影响是可行的;在爆破振动情况下,管道周围细沙对管道具有保护作用,在模拟研究中考虑细沙是必要的;确定了管道断面最大振动速度与断面正上方地表最大振速的函数关系式,并由此得到现场监测时管道正上方地表安全允许的最大振速为1.982 cm/s。研究结果可为邻近埋地输油管道的土石方爆破工程地表安全允许振动速度的确定提供参考。In order to ensure the safety of buried oil pipelines during blasting construction, the impact of blasting vibration on pipelines was simulated with the ANSYS/LS-DYNA fluid-solid coupling method in combination with the earthwork blasting of Shugang Avenue in West Harbor Area of Yantai adjacent to the buried oil pipeline. Based on the numerical simulation, the maximum vibration velocity at different sections of the pipeline and the ground surface directly above the sections were counted, and the obtained data were analyzed and studied with the least squares method. The results show that the vibration velocity simulated based on the fluid-solid coupling method is basically consistent with the measured results, it is feasible to study the impact of blasting vibration on the buried oil pipelines with the simulation method, and it is necessary to take into account the fine sands during the simulation study for the fine sands around the pipeline is protective to the pipelines. Furthermore, the functional relationship of the maximum vibration velocity of the pipeline cross-section and that on the surface directly above the cross-section was determined, and the maximum allowable vibration velocity of the ground safety above the pipeline during the field monitoring is 1.982 cm/s. The research results could provide reference for determining the allowable vibration velocity of ground safety for similar blasting works adjacent to buried oil pipelines.

关 键 词：埋地输油管道 爆破振动 安全允许振速 ANSYS/LS-DYNA 流固耦合 数值模拟 

分 类 号：TE88[石油与天然气工程—油气储运工程]