Dynamic behavior and failure of buried gas pipeline considering the pipe connection form subjected to blasting seismic waves
Dynamic behavior and failure of buried gas pipeline considering the pipe connection form subjected to blasting seismic waves
复制标题
考虑管道连接形式的埋地燃气管道在爆破地震波作用下的动力行为与破坏
DOI：
10.1016/j.tws.2021.108495
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发表时间：
2022-01
影响因子：
6.4
通讯作者：
Zhu Bin
中科院分区：
文献类型：
--
作者：
Zhao Ke;Jiang Nan;Zhou Chuanbo;Li Haibo;Cai Zhongwei;Zhu Bin
为了保证隧道爆破开挖过程中燃气管道的安全，研究埋地燃气管道在爆破振动作用下的动力响应具有重要意义。在大量工程实例的基础上，以城区具有代表性的直径1 m、壁厚10 cm的埋地燃气管道为研究对象，设计并实施了基于振动监测和动态应变监测的全尺寸埋地燃气管道爆破试验。在现场试验的基础上，建立了埋地燃气管道的三维数值模型，分析了埋地燃气管道的响应特性，并通过现场监测数据验证了数值模型的可靠性。考虑管道连接形式的影响，建立了埋地燃气管道螺栓法兰连接在不同爆破缩尺距离下的数值计算模型，以补充现场试验。进一步分析了无接口管道和螺栓法兰连接管道的动力响应特性，重点讨论了螺栓法兰连接的动力响应特性。最后，基于管道连接失效模式和现场试验管道动应变分析结果，综合提出了螺栓法兰连接管道和无接口管道的安全性评价方法。通过比较有螺栓法兰连接的管道和无接口管道的安全控制振动速度，得出法兰螺栓连接容易受到爆破振动的有害影响，考虑螺栓法兰连接的管道安全评价更加合理。
To ensure the safety of gas pipelines during tunnel blasting excavation, it is of vital significance to investigate the dynamic response of buried gas pipelines under blasting vibration. Based on a great number of engineering examples, a representative buried gas pipeline with a diameter of 1 m and a wall thickness of 10 cm in the urban area was taken as the research object, and a full-scale buried gas pipeline blasting experiment on basis of vibration monitoring and dynamic strain monitoring was designed and implemented Next, 3D numerical models were established to analyze the response characteristics of the buried gas pipeline based on the field experiment, and the reliability of the numerical model was verified by the field monitoring data. Considering the influence of pipeline connection form, the numerical calculation models of the buried gas pipelines with bolted flange joints were established under different blasting scaled distances to supplement the field experiment. The dynamic response characteristics of the pipeline without interface and pipeline with bolted flange joints were further analyzed, and the dynamic response characteristics of bolted flange joints were discussed emphatically. At last, based on the failure mode of pipeline connection and the results of dynamic strain analysis of pipeline in field experiment, the safety evaluation of pipeline with bolted flange joints and pipeline without interface was comprehensively proposed. By comparing the safety control vibration velocity of pipeline with bolted flange joints and pipeline without interface, it is concluded that the flange bolt connection is vulnerable to the harmful effect of blasting vibration and the safety evaluation of pipeline considering bolted flange connection is more reasonable.
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影响因子：
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作者：
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DOI：
10.1016/j.ijmecsci.2020.105627
发表时间：
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影响因子：
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