爆破对输气管道本体影响的监测
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摘要
通过管道震动加速度动态实时监测和管道本体变形实时监测相结合的方法,对受爆破影响区域的管道进行监测,并通过数据处理和分析,得到了爆破发生时管道的最大震动加速度和速度,以及爆破发生时刻和爆破前后的管道本体实时应变。结果表明:爆破时,垂直于管道的水平方向冲击最大,但与之相关的最大震动速度远远小于安全指标,平行于管道的水平方向和垂直于管道方向的加速度测量值较小。爆破对管道的变形有一定影响,但这种影响极其微弱,对管体不会产生破坏性影响。综合管道动态监测结果和管道本体应变监测结果表明,在与管道垂直距离200 m外及相当的爆破能量下的爆破对管道本体的影响极其微弱,管道处于安全状态。
The pipelines in areas affected by blasting are monitored by the combination of dynamic real-time monitoring of the pipeline vibration acceleration and the real-time monitoring of the pipeline body distortion.Data processing and analysis are conducted to derive the maximum vibration acceleration and velocity of pipeline when the blasting occurs and the real-time strain of pipeline body at the time of and before/after blasting.The results show that when the blasting occurs,the impact in horizontal direction perpendicular to the pipeline is the largest,while the maximum vibration speed is far less than the safety index;the observed values of acceleration in horizontal and vertical directions parallel to the pipeline is small.Blasting has certain but extremely weak effects on the deformation of the pipeline,but such deformation will not be destructive.The synthesis of dynamic monitoring results and strain monitoring results indicates that the blasting 200 m away vertically from the pipeline and at equivalent energy induces extremely weak effects on the pipeline,so the pipeline is safe.
The pipelines in areas affected by blasting are monitored by the combination of dynamic real-time monitoring of the pipeline vibration acceleration and the real-time monitoring of the pipeline body distortion.Data processing and analysis are conducted to derive the maximum vibration acceleration and velocity of pipeline when the blasting occurs and the real-time strain of pipeline body at the time of and before/after blasting.The results show that when the blasting occurs,the impact in horizontal direction perpendicular to the pipeline is the largest,while the maximum vibration speed is far less than the safety index;the observed values of acceleration in horizontal and vertical directions parallel to the pipeline is small.Blasting has certain but extremely weak effects on the deformation of the pipeline,but such deformation will not be destructive.The synthesis of dynamic monitoring results and strain monitoring results indicates that the blasting 200 m away vertically from the pipeline and at equivalent energy induces extremely weak effects on the pipeline,so the pipeline is safe.
引文
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[2]李又绿,姚安林,赵师平,等.爆炸载荷对埋地输气管道的动力响应和极限载荷分析[J].焊管,2009,32(11):63-69.
[3]姚安林,赵师平,么惠全,等.地下爆炸对埋地输气管道冲击响应的数值分析[J].西南石油大学学报(自然科学版),2009,31(4):168-172.
[4]赵师平,曾祥国,姚安林,等.第三方载荷作用下埋地输气管道动力响应的数值模拟[J].四川建筑科学研究,2009,35(1):134-139.
[5]程围峰,梁旭,王振宇.隧道爆破施工队邻近输油管道的影响评价[J].石油工程建设,2011,37(4):44-46.
[6]刘国华,王振宇.爆破荷载作用下隧道动态响应与抗爆分析[J].浙江大学学报(工学版),2004,38(2):204-209.
[7]唐润婷,李鹏飞,苏华友.桥梁桩基爆破施工对邻近埋地天然气管线的影响[J].工程爆破,2011,17(1):78-81.
[8]唐润婷,李鹏飞,苏华友,等.邻近埋地天然气管线桥梁桩基爆破施工减振方法的实践探讨[J].福建建设科技,2011(1):38-40.
[9]王世圣,张宏,崔孝秉.地震载荷作用下埋地管道强度的简化计算[J].油气储运,2000,19(11):19-22.
[10]苗胜坤.爆破队地下高压输气管道效应的监测方法[J].爆破,1994(4):76-77.
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