Analysis and Simulation of Long Tube Bag Sinking Movement
Peng Cheng · Yellow River · 2001
The sinking mechanism and sinking speed of long tube bags with full sand are analyzed based on the geometric characteristics and material feature, and formulas for the bag angle and location change calculation are obtained. According to the assumption of flexible connection among the bags, the analysis shows that the bag's sinking speed is related to the geometric characteristics, filling condition, as well as the flow velocity and sediment concentration of the river. The tube bag is influenced by forces of flow and gravity in sinking process. As to the normal and middle floods in the Yellow River, the location change can be controlled within 2 to 4 meters for the bags with diameter of 0.8 meter and length of 15 meters.