疏浚管线阻力系数计算模型及典型工程应用

Calculation model of pipeline resistance coefficient and the application of typical engineering

疏浚管路浆体阻力系数是水力式挖泥船输送受限施工工况产能预测的基础指标,针对阻力系数的计算,国内外公式繁多,但均属于半经验半理论公式,试验条件较为理想、公式适用性有一定限制,往往无法有效指导实际生产施工。文中介绍了利用挖泥船施工历史数据进行浆体阻力系数推算的方法,并开发阻力系数计算软件,以绞吸船在天津临港长距离吹填施工为例进行了案例分析,可为相似工况的产能预测项目提供依据。

The resistance coefficient of dredging pipelines slurry is the basic index of hydraulic dredger′ s production prediction when transportation is limited. For the calculation of resistance coefficient, there are many formulas at home and abroad, but they all belong to the semi empirical and semi theoretical formula. The experimental conditions are ideal, and the applicability of the formulas is limited, which can′t effectively guide the actual production and construction to some extent. We introduced the method to calculate the resistance coefficient of slurry using dredger construction history data, and developed the calculation software of slurry resistance coefficient. Taking the long distance dredging and filling construction of cutter suction dredger in Tianjin Port as an example, we carried out the cased analysis, which can provide the basis for production prediction project under similar working conditions.