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根据已建成的固定、半固定工程统计,管道建设的投资占工程总投资的70～90％,其中管材费用是主要的。如何降低管材费用,是降低管道造价的关键。喷灌工程的时间利用率较低,粮食作物的喷灌工程利用率更低。据调查综合利用较好的喷灌工程,年运行时间也未超过2000小时,一般工程都在500小时以下,多数为200小时左右。因此喷灌管道的经济管径应充分考虑这一特点,这对降低工程投资是很重要的。
According to the fixed and semi-fixed engineering statistics that have been completed, the investment in pipeline construction accounts for 70-90% of the total investment in the project, of which the cost of pipe is the major one. How to reduce the cost of pipe is the key to reducing pipeline construction cost. The sprinkler irrigation project has a low utilization rate of time and a lower utilization rate of sprinkler irrigation projects for food crops. According to a survey of comprehensive utilization of better sprinkler irrigation projects, the annual running time has not exceeded 2000 hours, the general project is under 500 hours, most of about 200 hours. Therefore, the economic management of sprinkler pipe should take full account of this feature, which is very important to reduce project investment.