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针对长输油气管道工程中可能面临的崩塌地质灾害问题,分析了不同高度、不同规模的落石对具有不同缓冲层厚度的浅埋管道的危害。以兰成渝成品油管道K0526+300处岩质边坡为研究对象,根据其节理裂隙发育程度以及“5.12”地震中此处崩塌落石特征确定模型尺寸,运用RocFall软件进行落石的能量、速率、运动轨迹、落点位置及最大冲击力等的模拟计算,并根据强度理论判定落石对管道的危害性。结果表明:该边坡可能崩塌的落石规模为40cm×90cm×75cm～210cm×195cm×310cm,体积大于0.7m3的中下部边坡落石对管道的危害极大,增大管道缓冲层厚度可在一定程度上降低落石对管道的冲击力。
In view of the possible collapsing geological disasters in the long-distance oil and gas pipeline project, the hazards of rockfalls of different buffer layer thickness with different height and different scales are analyzed. Taking rocky slope of K0526 + 300 of Lancheng-Yu product pipeline as the research object, the size of the model was determined according to the degree of its joint-fissure development and the characteristics of collapsing rockfall in the “5.12” earthquake, and the energy of rockfall was measured by RocFall software. Velocity, trajectory, position of impact point and maximum impact force were calculated. According to the strength theory, the risk of rockfall on the pipeline was determined. The results show that the falling rock mass of the slope is likely to collapse 40cm × 90cm × 75cm ~ 210cm × 195cm × 310cm, and the rockfall in the lower and middle slopes with a volume of more than 0.7m 3 greatly damages the pipeline, To a certain extent, reduce the impact of rockfall on the pipeline.