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针对岩架大桥的爆破拆除方案,开展了周围民宅爆破震动的监测研究,并对获得的震动实测数据进行了相应分析。结果表明,地表拆除爆破地震波衰减较快,结构物应尽量采取3个方向同时监测;同一爆破,不同结构物测点三向震动速度值的大小变化趋势可能不一样,但对同一结构物,不同层的测点在三向数值上大小变化趋势一致,并存在一定的放大效应。
Aiming at the blasting demolition scheme of rock bridge, the blasting vibration monitoring of surrounding residential buildings was carried out, and the acquired vibration measured data were analyzed correspondingly. The results show that the attenuation of ground surface demolition seismic waves is fast, and the structure should be monitored in three directions at the same time. The trend of the magnitude of the three-direction seismic velocity in the same blasting site may not be the same for the same blasting, but for the same structure, Layer of measuring points in the three-dimensional numerical trend of the same change, and there is a certain amplification effect.