中深孔台阶爆破振动对地下管道的影响研究

发布时间：2018-07-12 10:06

本文选题：爆破振动 + 峰值振速　；参考：《贵州大学》2015年硕士论文

【摘要】：中深孔台阶爆破主要有害效应——爆破振动对地表建筑物(构筑物)的影响研究较多,而其对地下设备的研究较少,随着地下管道——生命线工程的急速扩张,亟需深入开展爆破振动对地下管道的影响研究。本研究基于大龙经济开发区高铁城棚户区山地场平爆破工程,借助TC-4850N爆破振动测试仪、DH3820静态应变测试系统,根据现场实际情况进行爆破振动监测及地下管道应变监测,将爆破振动传播规律与地下管道轴向、环向应变联系起来,通过对现场实验监测数据的分析研究,总结爆破振动对地下管道的影响规律,并提出有效措施控制爆破振动有害效应,预测地下管道震害风险。具体研究成果如下:(1)现场监测结果证实爆破振动会引起地下管道产生轴向、环向应变。(2)分析地表峰值振速与地下管道应变之间的关系。(3)爆破振动地表峰值振速与地下管道轴向、环向应变呈指数函数关系,通过振动监测数据回归分析及峰值振速与应变的指数函数关系,预测管道所能承受的地表峰值振速。(4)根据最大振速的预测结果指导实际爆破施工,优化最大段装药量、装药结构、起爆方式等爆破施工设计,提出有效措施控制爆破振动有害效应。(5)爆破区域50m范围内的地下管道受振动影响较显著,50m以外影响大大减弱。
[Abstract]:The main harmful effect of bench blasting with medium and deep hole is that blasting vibration has much influence on surface buildings (structures), but less on underground equipment. With the rapid expansion of underground pipe-lifeline engineering, there is a great deal of research on the influence of blasting vibration on surface buildings (structures), with the rapid expansion of underground pipe-lifeline engineering. It is urgent to study the effect of blasting vibration on underground pipelines. Based on the horizontal blasting project of mountain field in the shantytown of high-speed railway city in Dalong Economic Development Zone, and with the help of TC-4850N blasting vibration tester DH3820 static strain test system, the blasting vibration monitoring and underground pipeline strain monitoring are carried out according to the actual situation in the field. The propagation law of blasting vibration is connected with the axial and circumferential strain of underground pipeline, and the influence of blasting vibration on underground pipeline is summarized by analyzing and studying the monitoring data of field experiment. Effective measures are put forward to control the harmful effect of blasting vibration and predict the risk of earthquake damage of underground pipeline. The concrete research results are as follows: (1) the field monitoring results confirm that blasting vibration can cause axial and circumferential strain of underground pipeline. (2) the relationship between the peak vibration velocity of ground surface and the strain of underground pipeline is analyzed. (3) the peak vibration velocity of blasting vibration and the axial direction of underground pipeline are analyzed. The circumferential strain assumes the exponential function relation. Through the regression analysis of the vibration monitoring data and the exponential function relation between the peak vibration velocity and the strain, the peak vibration velocity on the surface of the pipeline can be predicted. (4) according to the prediction result of the maximum vibration velocity, the actual blasting construction is guided. In order to optimize the blasting construction design, such as maximum charge quantity, charge structure, initiation mode and so on, effective measures are put forward to control the harmful effect of blasting vibration. (5) the influence of underground pipeline within 50 m range of blasting area is obviously weakened beyond 50 m.
【学位授予单位】：贵州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD235

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