城市地下浅埋管沟可燃气体爆炸的灾害效应 (Ⅱ):影响因素分析及后果评估

杨石刚 蔡炯炜 杨亚 孙文盛 门敬敏

杨石刚, 蔡炯炜, 杨亚, 孙文盛, 门敬敏. 城市地下浅埋管沟可燃气体爆炸的灾害效应 (Ⅱ):影响因素分析及后果评估[J]. 爆炸与冲击, 2023, 43(1): 015401. doi: 10.11883/bzycj-2021-0503
引用本文: 杨石刚, 蔡炯炜, 杨亚, 孙文盛, 门敬敏. 城市地下浅埋管沟可燃气体爆炸的灾害效应 (Ⅱ):影响因素分析及后果评估[J]. 爆炸与冲击, 2023, 43(1): 015401. doi: 10.11883/bzycj-2021-0503
YANG Shigang, CAI Jiongwei, YANG Ya, SUN Wensheng, MEN Jingmin. Disaster effects of combustible gas explosion in an urban shallow-buried pipe trench (Ⅱ): influencing factor analysis and consequence evaluation[J]. Explosion And Shock Waves, 2023, 43(1): 015401. doi: 10.11883/bzycj-2021-0503
Citation: YANG Shigang, CAI Jiongwei, YANG Ya, SUN Wensheng, MEN Jingmin. Disaster effects of combustible gas explosion in an urban shallow-buried pipe trench (Ⅱ): influencing factor analysis and consequence evaluation[J]. Explosion And Shock Waves, 2023, 43(1): 015401. doi: 10.11883/bzycj-2021-0503

城市地下浅埋管沟可燃气体爆炸的灾害效应 (Ⅱ):影响因素分析及后果评估

doi: 10.11883/bzycj-2021-0503
基金项目: 国家重点研发计划(2020YFB2103300);江苏省自然科学基金优秀青年基金(BK20180081)
详细信息
    作者简介:

    杨石刚(1985- ),男,博士,副教授,youngshg@126.com

    通讯作者:

    蔡炯炜(1994- ),男,硕士研究生,1348230496@qq.com

  • 中图分类号: O382

Disaster effects of combustible gas explosion in an urban shallow-buried pipe trench (Ⅱ): influencing factor analysis and consequence evaluation

  • 摘要: 为系统地评估城市地下浅埋管沟可燃气体爆炸的灾害后果,利用FLACS软件模拟得到了可燃气体的爆炸荷载,并分析了该灾害对建筑物破坏和人员伤害的危险距离及影响因素。结果表明:当点火位置靠近管沟中间位置时,超压峰值和危险距离较大;泄爆口的大小对危险距离的影响不大,而对离泄爆口较近处的超压峰值影响较大;气云长度越长,超压峰值和危险距离也越大,但增幅逐渐减小直至不变;管沟的横截面面积越大,超压峰值和危险距离也越大;为避免造成严重的灾害后果,高耸建筑物和密集人群应远离泄爆口。
  • 图  1  管沟的数值模型

    Figure  1.  The numerical model established for a pipe trench

    图  2  不同点火位置时的超压峰值分布

    Figure  2.  Peak overpressure distribution at different ignition positions

    图  3  不同泄爆口面积时的超压峰值分布

    Figure  3.  Peak overpressure distribution under different vent areas

    图  4  不同气云长度下的超压峰值分布

    Figure  4.  Peak overpressure distribution under different gas cloud lengths

    图  5  不同横截面面积的管沟内燃气爆炸超压峰值分布

    Figure  5.  Peak distribution of gas explosion overpressure in trenches with different cross-sectional areas

    图  6  可燃气体爆炸对建筑物破坏区域的剖面图

    Figure  6.  Sectional view of the damage area of the building caused by the explosion of combustible gas

    图  7  可燃气体爆炸对建筑物破坏区域的二维分布图

    Figure  7.  Two-dimensional distribution of the damage area of the building caused by the explosion of combustible gas

    图  8  中度破坏危险范围

    Figure  8.  Dangerous range of moderate damage

    图  9  不同因素对建筑物破坏危险距离的影响

    Figure  9.  Effects of different factors on the dangerous distance for building damage

    图  10  人员轻伤区的二维剖面图

    Figure  10.  Two-dimensional section view of lightly-injured area

    图  11  人员轻伤区危险距离

    Figure  11.  Dangerous range of minor injury zone

    图  12  不同因素对人员伤害危险距离的影响

    Figure  12.  Effects of different factors on dangerous distance of personal injury

    表  1  管沟可燃气体爆炸数值模拟工况

    Table  1.   Numerical simulation conditions on combustible gas explosion in a pipe trench

    工况点火位置气云长度/m截面面积/m2泄爆口边长/m工况点火位置气云长度/m截面面积/m2泄爆口边长/m
    1(4/8)L9011.07(4/8)L6011.0
    2(5/8)L9011.08(4/8)L4011.0
    3(6/8)L9011.09(4/8)L2011.0
    4(7/8)L9011.010(4/8)L1011.0
    5(4/8)L9010.811(4/8)L9021.0
    6(4/8)L9010.612(4/8)L9031.0
    下载: 导出CSV

    表  2  冲击波超压对建筑物的影响[19]

    Table  2.   Impact of shock wave overpressure on buildings[19]

    超压/kPa影响区域超压/kPa影响区域
    0.14出现噪音安全区>6.90房屋受到破坏中度破坏区
    0.21大玻璃可能破碎9.00钢构件出现轻微形变
    0.69小玻璃可能破裂13.80墙面局部出现坍塌
    1.03~2.07玻璃破碎的典型超压值20.70~34.50钢结构出现大变形
    >2.07安全距离;屋顶出现破坏轻度破坏区>34.50~48.20房屋严重损坏重度破坏区
    3.40~6.90窗户遭到破坏68.9建筑物全部遭受破坏
    下载: 导出CSV

    表  3  冲击波超压对人员的影响[3]

    Table  3.   Impact of shock wave overpressure on personnel[3]

    超压/kPa伤害等级区域超压/kPa伤害等级区域
    <10安全安全区45~7550%重伤率重伤区
    10~25轻伤轻伤区>75死亡死亡区
    >25~451%重伤率
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-12-08
  • 修回日期:  2022-09-18
  • 网络出版日期:  2022-12-11
  • 刊出日期:  2023-01-05

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