Abstract In order to study the impact of surface explosion load such as terrorist attacks and disasters on buried pipelines, the field experimental study of the dynamic response characteristics of buried pipelines under surface explosion load was carried out by means of explosion experiment of on-site pre-buried pipelines and explosives, combined with blasting vibration and dynamic strain monitoring. The attenuation law of the ground surface peak particle velocity (PPV) above the pipeline was analyzed under explosion load with varied explosive charge and different blasting distances, meanwhile, the PPV and the peak particle strain (PPS) distribution characteristics of buried pipelines under surface explosion load are studied. The function expression of the relationship between ground surface's PPV, pipeline's PPV and pipeline's PPS is established on the basis of field experiment results. Integrated with the maximum allowable strain theory of pipelines, the safety evaluation of buried pipelines under blasting load is carried out. Then, the “safety area” of explosion parameters for preventing pipeline damage is proposed.

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地表爆炸载荷作用下埋地管道响应特性试验研究

摘要 为研究恐怖袭击、灾害等地表爆炸载荷对埋地管道的影响，通过现场预爆试验，对地表爆炸载荷下埋地管道的动力响应特性进行现场试验研究。 - 埋地管道和爆炸物，结合爆破振动和动态应变监测。分析了不同装药量和不同爆破距离的爆炸载荷下管道上方地表峰值粒子速度(PPV)的衰减规律，同时分析了地表爆炸下埋地管道的PPV和峰值粒子应变(PPS)分布特征。负载进行了研究。地表PPV、管道PPV与管道关系的函数表达式 s PPS 是根据现场试验结果建立的。结合管道最大许用应变理论，对爆破荷载下埋地管道进行安全评价。然后，提出了防止管道损坏的爆炸参数“安全区”。