Abstract：In order to improve and develop the hydraulic transportation technology of tube loading pipeline, the influence factors of double vehicle transport velocity of tandem pipeline in pressure pipeline are studied by combining physical model test and theoretical analysis. The results show that: with the increase of Reynolds number, pipe vehicle diameter and vehicle length, the transportation velocity of two-pipe vehicles increases gradually. However, with the increase of the load, the transportation velo-city of two-pipe vehicles will gradually decrease. The results shown that the transportation velocity of two-pipe vehicles is less than that of single pipeline vehicle under different vehicle spacing, and with the increase of vehicle spacing, the transportation velocity of two-pipe vehicle gradually increases and approaches to that of single pipeline vehicle. The standard regression coefficient method in multiple regression analysis was used to analyze the influencing factors. The results showed that the influence of Reynolds number, vehicle diameter, vehicle length, load and distance between two vehicles on the transportation velocity of pipeline vehicles decreased in turn. The research results provide a certain re-ference and basis for optimizing the structure of the pipeline vehicle, increasing the transportation velocity of the two-pipe vehicles, and reducing the transportation energy consumption of pipeline vehicle.
