砂性土粒径与水力式疏浚施工输送产量的关系

Effect of sandy soil particle size on hydraulic dredging transportation production

砂性土输送生产率计算需要较为复杂的过程,其涉及泥泵特性、管路布设信息、驱动功率、天然土密度、沉降流速等数据,且往往其中部分量难以准确获取。为此,专门针对砂性土粒径对输送的影响进行研究,依据浆体管路输送原理,对疏浚施工水力式挖泥船砂性土输送生产率限制条件进行分析,得到简化的砂性土生产率计算方法,在已知某种砂性土粒径的情况下,可直接求出输送生产率,而不必经过泥泵特性曲线、管路曲线求取等复杂过程,该方法可为疏浚工程生产预测提供参考。

Sandy soil productivity calculations require more complex delivery process, which involves the characteristics of pumps, piping layout information, driving power, natural soil density, settling velocity of flow, and often difficult to accurately obtain some amount. Based on the transportation principle of slurry pipeline, we analyze the restrictions of hydraulic dredger medium sand dredging productivity, and obtain the specific relationship between the particle size and productivity of hydraulic dredgers transportation under the system＇s limitations of load and discharge pressure. According to the quantitative relationship, in cases of some sandy soil particle known, the productivity of other sand particle size can be obtained directly without needing complex calculations. This method can provide a reference for the forecast of the dredging project＇s production and revision of the dredging norm.