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采用一维渗流试验装置研究了ＰＶＣ双壁波纹管用作农田排水时的适宜开孔率，试验表明：ＰＶＣ双壁波纹管用作农田排水暗管时开孔率不必要求过高，控制在２．５％～３０％之间即可满足生产要求。
One-dimensional seepage test device was used to study the suitable open area ratio of PVC double-wall corrugated pipe used for farmland drainage. The experiment shows that the opening rate of PVC double-wall corrugated pipe used as farmland drainage tube is not necessarily too high, controlled at 2.5 % ~ 3 0% to meet the production requirements.