针对管路直径对造价最大影响的问题,以景泰川提水工程为例,综合考虑管道与水泵的关系,以年费用最小为目标确定管路经济管径,将求解经济管径的工程问题转化为求解年费用最低的经济问题。计算结果表明,该方法简便、精度较高,可为已建管路的节能改造提供参考。 Aiming at the problem that the pipe diameter has the biggest impact on the construction cost, taking the Jingtai River pumping project as an example, considering the relationship between the pipeline and the pump, the pipeline economic pipe diameter is determined with the aim of minimizing the annual cost and the engineering problem solving the economic pipe diameter is transformed To solve the lowest cost of economic problems. The calculation results show that the method is simple and accurate, which can provide a reference for the energy-saving retrofit of the constructed pipeline.