抛石基床水下爆破夯实的振动冲击监测与分析

Monitoring and analysis of vibration and shock induced by underwater blasting ramming of rubble bed

针对港口码头抛石基床水下爆破夯实过程中的振动冲击问题,结合威海港国际客运码头工程实例,对基床爆夯产生的水中冲击波超压与质点爆破振动速度进行监测。通过对比,分析水中冲击波超压监测值小于经验公式计算值、水平径向质点振动速度监测值大于经验公式计算值的原因,研究水中冲击波超压与爆破地震波对临近已建成码头的作用和影响,利用监测数据拟合得到可供类似工程参考使用的水中冲击波超压经验公式,可为基床爆夯施工的安全技术工作提供参考。

Aiming at the vibration and shock problems induced by underwater blasting tamping of rubble bed,the water shock wave positive pressure and the blasting vibration velocity are monitored combined with the construction of Weihai port international passenger terminal project.By contrast,we analyze the causes of the significant deviation between the monitored values and the calculated values of the shock wave positive pressure and the horizontal radial particle vibration velocity,and study the effects of the shock wave positive pressure and the blasting seismic wave on the completed wharf.Moreover,we obtain the empirical formula of the water shock wave positive pressure for similar projects by regression analysis of the monitoring data.The analysis results can provide reference for safety technical work of rubble bed blasting ramming construction.