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为降低暗管工程施工成本 ,在实验室利用模拟实验装置研究了PVC双壁波纹排水暗管的滤水结构。试验表明 :在粉砂、粉质壤土等弱透水性介质中 ,PVC双壁波纹排水暗管的开空率达到1.6 %就可满足农田地下排水要求 ,砂砾滤料的铺设厚度不应于4.5 ,生产实际中砂砾滤料的铺设厚度宜取9～12
In order to reduce the construction cost of the underground pipe project, the drainage structure of PVC double-wall corrugated drain pipe was studied in the laboratory by using the simulation experiment device. The test shows that in the weakly permeable media such as silt and silty loam, the emptying rate of PVC double-wall corrugated drain pipe reaches 1.6% to meet the requirement of underground drainage of farmland. The thickness of the gravel filter should not be 4.5, The actual production of gravel filter laying thickness should take 9 to 12