根据海底管线局部冲刷平衡深度的实质,结合流速型、功率型推移质输沙率公式和能量平衡原理,在Chao-Hennesy解析法基础上,提出均流作用下管线局部冲刷平衡深度的半理论半经验预估方法.该方法适用于动床冲刷情况,可对潮流作用下的管线局部冲刷平衡深度进行预估.以埕岛油田为例,本文方法计算结果与实测数据较为接近. Based on the Chao-Hennesy analytical method, a semi-theoretical half-depth of the partial scouring equilibrium of the pipeline under current sharing is proposed according to the essence of submarine pipeline local scouring equilibrium depth, combined with the flow rate, power-driven sediment transport rate formula and energy balance principle Empirical prediction method.The method is suitable for the case of moving bed scouring and can estimate the partial scouring equilibrium depth of pipelines under the action of tidal current.As an example of Chengdao oilfield, the calculation results of this paper are close to the measured data.