Study on the influence of dynamic compaction vibration on the nearby buried oil pipeline

Abstract

On-site monitoring of the surface vibration of the upper side of the adjacent slope caused by the construction of dynamic compaction was carried out, and the vibration velocity of the mass point under multiple dynamic compactions with various distances from the dynamic compaction point was measured. The Fast Fourier Transform is adopted to analyze the main frequency distribution of the three-directional vibration velocity of the dynamic compaction vibration, and dynamic compaction is characterized by a three-directional vibration velocity that is concentrated between 5 and 25 Hz. Among them, the main frequencies of the radial and vertical vibrations are relatively more concentrated, while the tangential vibration frequencies have multiple different peaks. The attenuation law of the dynamic compaction vibration velocity of the site with the straight-line distance between the monitoring point and the dynamic compaction point is studied under multiple dynamic compactions. The attenuation formula of the peak combined vibration velocity with the straight-line distance from the dynamic compaction point is established. The peak vibration velocity of 2.0 cm/s is proposed in reference to the vibration parameters specified in the current national standards and based on similar domestic projects, as a safety evaluation standard for buried oil pipelines by reserving a certain safety factor. According to this standard, it can be inferred that the dynamic compaction construction operation has no impact on the safety of the buried oil pipeline on the adjacent slope.