不同类型垫层对埋地管道爆炸超压影响

发布时间：2018-06-28 16:49

本文选题：埋地管道 + 管道爆炸　；参考：《爆破》2017年01期

【摘要】：城市内埋地油气管道多,距离居民生活区域近,隐患大,爆炸后果影响严重。以某条市内油气管线泄露爆炸为例,通过设置埋地管道下方为土壤、混凝土和空气等三种不同工况,基于ANSYS/LS-DYNA对管道爆炸后不同工况下空气中的冲击波超压衰减规律进行分析。管道敷设深度为1.2 m,与居民楼直线距离为19 m,管道上方覆盖材料为土壤,在地面处铺设混凝土厚度0.15 m。以距离埋地管道5 m、10 m、15 m及19 m四个不同位置为例分析超压的变化特点,并对18 m处距地面高度分别为0.5 m、1.0 m、1.4 m三个不同位置处的超压变化规律进行分析。结果显示:三种类型垫层对冲击波超压的影响差异显著,靠近管道位置处,采用空气柱作为垫层时,其对应的超压相比土壤及混凝土垫层均大大降低。因此,应针对管道与建筑物之间的不同距离,设置不同类型的垫层来降低爆炸事故造成的危害后果。
[Abstract]:There are many buried oil and gas pipelines in the city, which are close to the residents' living area. Taking the leakage and explosion of a city oil and gas pipeline as an example, the attenuation law of shock wave overpressure in the air under different conditions after pipeline explosion is analyzed based on ANSYS- LS-DYNA by setting three different working conditions of soil, concrete and air below the buried pipeline. The laying depth of pipeline is 1.2 m, the distance from residential building is 19 m, the covering material is soil, and the thickness of concrete is 0.15 m on the ground. The variation characteristics of overpressure are analyzed by taking four different positions of 5 m ~ 10 m ~ (-1) and 19 m ~ (th) from buried pipeline as an example, and the variation law of overpressure at 18 m ~ (18 m) to the ground height of 0.5 m ~ (10) m ~ (-1) m ~ (1.4) m is analyzed. The results show that the effect of three types of cushion on shock wave overpressure is significant. When the air column is used as the cushion near the pipeline, the corresponding overpressure is significantly lower than that of soil and concrete cushion. Therefore, different types of cushion should be set according to the different distance between the pipeline and the building to reduce the harmful consequences of the explosion accident.
【作者单位】：中国劳动关系学院安全工程系;
【基金】：北京高等学校青年英才计划项目中国劳动关系学院一般项目(17YY001)~~
【分类号】：TE88

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