长管袋沉降过程的分析与模拟  

Analysis and Simulation of Long Tube Bag Sinking Movement

作　　者：彭成山[1] 孙东坡[1] 刘凤莲[1] 耿明全[2] 

机构地区：[1]华北水利水电学院,河南郑州450045 [2]河南黄河河务局,河南郑州450003

出　　处：《人民黄河》2001年第7期16-17,19,共3页Yellow River

摘　　要：根据充沙长管袋的几何、材料特性 ,分析了管袋沉降机理与沉降速度 ,导出了管袋位移与转角的计算公式。根据柔性连接体的假设 ,分析认为管袋沉降速度与管袋几何特性、充填度以及河流的流速与含沙量有关 ,管袋在沉降过程中同时受到水流冲击与重力作用。对黄河下游中常洪水 ,采用直径 0 .8m、长 15m的管袋 ,其沉降位移可控制在 2 4m。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.

关 键 词：充沙长管袋 沉降机理 绕流阻力 防汛抢险 

分 类 号：TV143[水利工程—水力学及河流动力学]