疏浚排泥管在不同管道组合下的输送摩阻分析

Analysis of friction resistance of dredging pipe under different pipe combinations

疏浚排泥管是疏浚工程介质输送的重要组成部分,其输送阻力是吹填排距和性能的决定性因素之一。以细粉砂土质的三夹沙南航道工程为依托,针对疏浚排泥管开展2 m长橡胶管和12 m长钢制管在不同连接组合方式下的输送阻力现场试验与对比分析。结果表明:管道压力损失随着输送流速和浓度的增大而增大;纯钢管组合下的输送摩阻最小,“4钢管+1橡胶管”组合的输送摩阻次之,“1钢管+1橡胶管”组合的输送摩阻最大,其相比于纯钢管组合的输送摩阻增大约6%。研究结果可为工程现场的排泥管布设与施工提供指导。

The dredging pipe is an important part of medium transportation in dredging engineering,and its friction resistance is one of the decisive factors for dredging distance and performance.Based on Sanjiasha south channel project with the fine silt soil,we carry out the field test and comparative analysis of the transportation resistance under different pipe combinations with 2m-rubber pipe and 12m-steel pipe for the dredging pipe.The results show that the pressure loss increases with the increase of transport velocity and concentration;The friction resistance of the steel pipe combination is the smallest,followed by the“4 steel pipe+1 rubber pipe”combination,and the“1 steel pipe+1 rubber pipe”combination has the largest friction resistance,which increases by about 6%compared with the steel pipe combination.The research result provides a guidance for the layout of dredging pipes on the project site.