Based on the cost function, analysis is made of the cost composition and key factors governing the cost of the drainage pipeline, taking for example the trenched piping construction of outdoor drains.

• 通过费用函数对排水管道的造价构成及影响造价的主要因素进行了分析,并就施工方法为开槽埋管的室外排水管为对象,对其费用构成及费用函数进行了探讨。