Test and analysis of an existing tunnel vibration induced by blasting construction of diaphragm wall

Abstract

According to the blasting construction of the diaphragm wall of Puxi approaching section of East Fuxing Road river-crossing tunnel, the monitoring project of the vibration of the existing tunnel induced by the blasting construction is put forward, which includes the sensors’ location, monitor method and the vibration monitoring system. Based on the monitoring data of the explosion vibration, the vibration wave forms, velocities, acceleration responses, main frequencies and fields of measure points are analyzed under the conditions of three locations and different charge quantities. According to the safety-judging standard of explosion vibration, the conclusion that the existing tunnel is safe under the explosion vibration is then drawn. Furthermore, the spectrum characteristics of three explosion vibrations and the spectrum changing properties of explosion vibration wave transmitting in different directions are concluded, which can provide reference to similar projects.

Keywords

diaphragm wall / explosion vibration / vibration monitoring / tunnel / spectrum properties

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