浅埋三舱管廊甲烷爆炸的地面响应规律

王桂林 欧阳啸天 翟俊 孙帆

王桂林, 欧阳啸天, 翟俊, 孙帆. 浅埋三舱管廊甲烷爆炸的地面响应规律[J]. 高压物理学报, 2021, 35(1): 015202. doi: 10.11858/gywlxb.20200616
引用本文: 王桂林, 欧阳啸天, 翟俊, 孙帆. 浅埋三舱管廊甲烷爆炸的地面响应规律[J]. 高压物理学报, 2021, 35(1): 015202. doi: 10.11858/gywlxb.20200616
WANG Guilin, OUYANG Xiaotian, ZHAI Jun, SUN Fan. Ground Response Law of Methane Explosion in Shallow Buried Three-Cabin Pipe Gallery[J]. Chinese Journal of High Pressure Physics, 2021, 35(1): 015202. doi: 10.11858/gywlxb.20200616
Citation: WANG Guilin, OUYANG Xiaotian, ZHAI Jun, SUN Fan. Ground Response Law of Methane Explosion in Shallow Buried Three-Cabin Pipe Gallery[J]. Chinese Journal of High Pressure Physics, 2021, 35(1): 015202. doi: 10.11858/gywlxb.20200616

浅埋三舱管廊甲烷爆炸的地面响应规律

doi: 10.11858/gywlxb.20200616
基金项目: 国家重点研发计划(2018YFB2101000)
详细信息
    作者简介:

    王桂林(1970-),男,博士,教授,主要从事岩土工程研究. E-mail:glw@cqu.edu.cn

    通讯作者:

    王桂林(1970-),男,博士,教授,主要从事岩土工程研究. E-mail:glw@cqu.edu.cn

  • 中图分类号: O382

Ground Response Law of Methane Explosion in Shallow Buried Three-Cabin Pipe Gallery

  • 摘要: 地下综合管廊可燃性气体爆炸事故时有发生,给地面人员的生命和财产造成了巨大损失。依托重庆市某地下综合管廊试点工程,基于物质点法,采用点火增长模型模拟浅埋管廊泄漏甲烷气体爆炸冲击管廊本体结构和围岩的过程,研究爆炸作用下地面压强与位移的响应特性。研究发现:泄爆作用下管廊及围岩会出现因接触面反射和折射产生的次生应力波,管廊横向方向次生波振幅随距起爆点水平距离的增大而增大,而管廊纵向方向产生的次生波振幅较小,且随距离增大变化较小;爆炸作用造成整体地面沉降,但在起爆点中心附近地面隆起,这种隆起由管廊本体结构破裂,气体直接冲击岩土体形成的剧烈隆起和管廊整体震动形成的轻微隆起两部分组成。

     

  • 图  2014年高雄地下丙烯管道爆炸现场[1]

    Figure  1.  Explosion scene of the underground propylene pipeline in Kaohsiung in 2014[1]

    图  多物体接触计算示意图

    Figure  2.  Schematic diagram of multi-object contact algorithm

    图  某地下综合管廊现场照片

    Figure  3.  Picture of an underground comprehensive pipe gallery

    图  数值模拟模型内部示意图

    Figure  4.  Internal schematic diagram of numerical simulation model

    图  模型截面示意图

    Figure  5.  Model section schematic

    图  爆炸后不同时刻地面压强分布

    Figure  6.  Distribution of ground pressure at different times after explosion

    图  管廊横向质点压强随时间变化曲线

    Figure  7.  Variation curves of particle pressure in the horizontal direction of pipe gallery with time

    图  管廊横向质点压强峰值随起爆点距离的变化

    Figure  8.  Peak particle pressure in the horizontal direction of pipe gallery with distance of initiation point

    图  管廊纵向质点压强随时间变化曲线

    Figure  9.  Variation curves of particle pressure in the longitudinal direction of the pipe gallery with time

    图  10  管廊纵向质点压强峰值随起爆点距离变化

    Figure  10.  Peak particle pressure of the pipe gallery with the distance of the initiation point in the longitudinal direction

    图  11  不同时刻地面竖向位移响应分布情况

    Figure  11.  Distribution of ground vertical displacement at different times

    图  12  管廊纵向质点竖向位移随时间变化曲线

    Figure  12.  Variation curves of vertical displacement of particles in the longitudinal direction of pipe gallery with time

    图  13  管廊纵向质点相对竖向位移随起爆点距离的变化

    Figure  13.  Relative vertical displacement of particlesin the longitudinal direction of pipe gallerywith distance of initiation point

    图  14  管廊横向质点相对竖向位移随时间变化曲线

    Figure  14.  Variation curves of relative vertical displacement of particles in the horizontal direction of pipe gallery with time

    图  15  管廊横向质点相对竖向位移随距起爆点距离变化

    Figure  15.  Rrelative vertical displacement of particles in the horizontal direction of pipe gallery with distance of initiation point

    表  1  围岩和管廊本体结构力学参数

    Table  1.   Mechanical parameters of surrounding rock and pipe gallery structure

    Component$\;\rho $/(kg·m–3)E/GPa$\nu$$\sigma_{\rm{t}}$/MPa$q_\varphi$$K_\varphi$$\psi $
    Surrounding rock2 10040.30.0010.2121 1190
    Pipe gallery structure2 600300.22.0000.607.18 × 1060
    下载: 导出CSV

    表  2  甲烷-空气混合气体高能燃烧模型计算参数

    Table  2.   Calculation parameters of high-energy combustion model of methane-air mixture

    Component$\gamma $E0/(MJ·m–3)$\;\rho $/(kg·m–3)D/(m·s–1)Vf/%pCJ/MPa
    CH4-Air1.2823.7751.192 7859.51.9
    下载: 导出CSV

    表  3  数值模拟验证结果

    Table  3.   Numerical simulation verification results

    Position/mPressure/kPa$\delta $/%Position/mPressure/kPa$\delta $/%
    ExperimentSimulationExperimentSimulation
    20145.33153.685.75200147.33164.3211.53
    60165.67180.328.84280137.67148.027.52
    80169.67181.947.23340136.00147.618.54
    120154.00169.219.88380129.00145.2712.61
    下载: 导出CSV
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  • 收稿日期:  2020-09-21
  • 修回日期:  2020-10-15

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