【摘要】 利用控制爆破拆除了上海市外环线越江隧道临时干船坞的搅拌桩墙体。文中简介了爆破方案和起爆网路的设计。利用先进的一体化加速度记录系统对爆破震动进行了监测 ,并通过数值积分方法获取速度参数。在此基础上 ,对测试数据、振动速度的传播特性等进行比较详尽的分析。结果表明 ,此次爆破产生的振动速度频谱的主要频率为 2Hz左右 ,与上海地区四类场地土的卓越频率相近 ,与理论估计值吻合更多还原

【Abstract】 The wall body of temporary dry dock for external ring line tunnel across the Huangpu River in Shanghai was demolished by controlled blasting In this paper,the design of blasting scheme and priming circuit was briefly introduced The monitoring of blasting vibration was carried out by use of an advanced integrated acceleration recording system and the velocity parameters were acquired through the numerical integration On the above basis,the measured data and the propagation characteristics of vibration velocity were analyzed in detail The results indicate that main frequency of vibration velocity spectra is about 2Hz,approximate to the dominant frequency of fourth kind of field earth in Shanghai district and is in line with estimated theoretical value更多还原