Experiments for effect of blasting vibration on underground pipeline and risk prediction

To explore the influence of blasting vibration on underground pipelines, the peak particle velocity was used as a criterion of blasting vibration and the strain was used as a criterion of underground pipeline affected by vibration. A TC-4850N blasting vibration measurer and a DH3820 static strain test system were used to monitor the blasting construction of a project. They measured surface vibration signal and the axial and circumferential strain of the pipe. Fitting analysis of peak particle velocity and pipeline strain shows that there is exponential relationship between blasting vibration peak particle velocity and axial and circumferential strain of corresponding underground pipelines. The fitting relationship was combined with the attenuation law of blasting vibration to predict the maximum ground peak velocity that the pipeline can support. The safe distance was 25.25 m. Thus it needs to improve the 50 m prohibiting range in blasting and forecast the safe distance of underground pipeline according to the actual situation. © 2017, Editorial Office of Journal of Vibration and Shock. All right reserved.