爆破振动对地下管道影响试验及风险预测

发布时间：2018-03-05 03:31

本文选题：爆破振动　切入点：峰值振速　出处：《振动与冲击》2017年16期 　论文类型：期刊论文

【摘要】：为了降低爆破振动有害效应,探究爆破振动对地下管道的影响,需基于管道破坏的应变准则,建立爆破振动质点峰值速度与管道破坏的对应关系。利用TC-4850N爆破振动测试仪、DH3820静态应变测试系统在大龙经济开发区高铁城棚户区山地场平工程进行爆破现场试验;对获得不同爆心距、不同最大段装药量时管道地表振动峰值速度及相应管道轴向、环向应变,进行拟合分析,结果表明合成峰值振速与地下管道轴向、环向应变呈指数函数关系;结合该场地条件下爆破振动衰减规律及管道最大容许应变,预测出试验条件下管道所能承受的地表最大峰值振速及此爆破条件下管道爆破施工安全距离。分析表明,燃气管道50 m范围内禁止爆破施工的规定有待改进,应根据实际情况分析预测地下管道安全距离。
[Abstract]:In order to reduce the harmful effect of blasting vibration and explore the influence of blasting vibration on underground pipeline, it is necessary to base on the strain criterion of pipeline failure. The relationship between peak velocity of blasting vibration particle and pipeline failure was established. The blasting site test was carried out by using TC-4850N blasting vibration tester (DH3820) static strain test system in the mountainous field leveling project of high-speed rail city shanty town in Dalong Economic Development Zone. The peak velocity of surface vibration of pipeline and the axial and circumferential strain of the corresponding pipeline are fitted and analyzed when different detonation centroid distance and different maximum charge amount are obtained. The results show that the composite peak vibration velocity is the same as the axial direction of underground pipeline. The toroidal strain assumes the exponential function, and combined with the attenuation law of blasting vibration and the maximum allowable strain of pipeline under the condition of the site, The maximum peak vibration velocity of the surface under the test condition and the safety distance of the pipeline blasting construction under this blasting condition are predicted. The analysis shows that the prohibition of blasting construction in the 50 m range of the gas pipeline needs to be improved. The safety distance of underground pipeline should be analyzed and forecasted according to the actual situation.
【作者单位】：贵州大学矿业学院;贵州新联爆破工程集团有限公司;中国矿业大学(北京)力学与建筑工程学院;
【基金】：国家自然科学基金(51664007) 黔科合高G字[2015]4004 贵州省工业和信息化发展专项基金计划(2015030) 贵州省高层次创新型人才培养黔科合人才(2016)4030号
【分类号】：TU751.9;TU990.3

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