落石对埋地管道冲击作用的定量分析

Quantitative Analysis of Rockfall Impact on Buried Pipeline

文章论述了落石的形成条件及其对埋地管道的冲击危害,介绍了落石冲击力的计算公式,在此基础上结合国内某条山区管道所发生的落石事故,进行了管道变形计算、预制板抗冲切计算等,计算结果与实际基本吻合。文章指出:单纯的预制板等硬覆盖措施对减弱落距高、质量大的落石冲击作用并不明显,增大管顶覆土厚度是减轻管道受落石冲击的简单、有效的措施。

Forming condition of rockfall and its impact damage to buried pipeline are discussed. The formulas of rockfall impact force are used for the calculations of a rockfall accident happened to a buried pipeline in mountainous region including pipeline deformation and precast slab punching shear strength. The calculation results accord with the actuality. It is point out that using only hard cover such as precast slabs to reduce impact force of rockfall with large falling distance and big mass has unobvious effect, and increasing covered soil depth over pipeline is a simple and effective measure to reduce rockfall impact effect.