Safety assessment of buried gas pipeline subject to surface explosion: A case study in Wuhan, China
Safety assessment of buried gas pipeline subject to surface explosion: A case study in Wuhan, China
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地表爆炸埋地燃气管道安全评估：以中国武汉为例
DOI：
10.1016/j.engfailanal.2020.105119
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发表时间：
2021-02-01
影响因子：
4
通讯作者：
Wu, Tingyao
中科院分区：
文献类型：
--
作者：
Tang, Qichen;Jiang, Nan;Wu, Tingyao
为了保证城市地面爆炸施工和恐怖袭击中地下燃气管道的安全，研究地面爆炸作用下埋地燃气管道的安全性是必然的。本文以武汉经济开发区一条运行中的燃气管道为例，在开放现场进行了表面爆炸全尺寸实验。现场试验采用小药量2号岩石乳化炸药模拟地面施工爆破，采用TC-4850型爆破振动速度测试仪和DH 5956型动态应变测量系统进行监测，现场数据分析表明，试验数据符合一般规律，证明了现场试验的可靠性。其次，建立了地面爆炸作用下管道响应特性的数值模型，并通过现场监测数据验证了模型的可靠性。在数值分析中，根据实际工况对管道给出了0.2MPa的工作压力，并讨论了地面大药量爆破条件下管道的响应特性。基于模拟结果，分析了地面爆炸作用下管道的危险截面和危险点，推导了管道危险点峰值有效应力（PES）与地表装药量的函数关系。最后，根据有关规范确定的PES管道控制值，得出了地表施工爆破的控制药量。进一步对2号岩石乳化炸药与TNT炸药进行了当量换算分析，得到了地面恐怖袭击TNT控爆装药。
To ensure the safety of the underground gas pipeline in urban ground explosion construction and terrorist attack, a study of the safety of buried gas pipelines under surface explosions is inevitable. In this paper, an operating gas pipeline in Wuhan Economic Development Zone is taken as an example, and the surface explosion full-scale experiment is carried out in the open site. In the field experiment, small charge of No. 2 rock emulsion explosives were used to simulate ground construction blasting, the blasting vibration velocity tester (TC-4850) and dynamic strain measurement system (DH5956) are used to monitor data, the analysis of field data shows that the experimental data meet the general rules, which proves the reliability of the field experiment. Secondly, the numerical model of pipeline response characteristics under surface explosion is established, and the reliability of the model is verified by field monitoring data. In the numerical analysis, the operating pressure of 0.2 MPa is given to the pipeline following the actual working condition, and the response characteristics of the pipeline under the condition of large explosive charge blasting on the surface are discussed. Based on the simulation results, the dangerous section and dangerous point of the pipeline under the action of ground explosion are analyzed, and the functional relationship between the peak effective stress (PES) of pipeline dangerous point and the explosive charge on the surface is deduced. Finally, according to the pipeline control value of PES determined in relevant specifications, the controlled explosive charge of surface construction blasting is obtained. Further, the equivalent conversion analysis of No. 2 rock emulsion explosive and TNT explosive is carried out, and the TNT controlled explosive charge of ground terrorist attack is obtained.