Monitoring on effects of blasting on gas pipeline body distortion

The pipelines in areas affected by blasting are monitored by the combination of dynamic real-time monitoring of the pipeline vibration acceleration and the real-time monitoring of the pipeline body distortion. Data processing and analysis are conducted to derive the maximum vibration acceleration and velocity of pipeline when the blasting occurs and the real-time strain of pipeline body at the time of and before/after blasting. The results show that when the blasting occurs, the impact in horizontal direction perpendicular to the pipeline is the largest, while the maximum vibration speed is far less than the safety index; the observed values of acceleration in horizontal and vertical directions parallel to the pipeline is small. Blasting has certain but extremely weak effects on the deformation of the pipeline, but such deformation will not be destructive. The synthesis of dynamic monitoring results and strain monitoring results indicates that the blasting 200 m away vertically from the pipeline and at equivalent energy induces extremely weak effects on the pipeline, so the pipeline is safe.