Net pipes are irrigate in the vertical sub-irrigation construction methods of one Seed and filling, The Guan Gai Net pipes define a Ge comprising a Ge and irrigate channel Net tube walls, the spiral that Yi Strip Knot close The Net tube walls periphery Wai mends Strong Tapes, and one Ge as The spirals mend Strong Tapes define made of Luo Xuan Ring Ditch, there is The Net tube walls Number Ge Wai Wound The to irrigate channel Zhi Net Strip, Zhi the Luo Xuan Net Strip that Shao mono- Strip With The Deng Zhi Net Strip Even Knot And With The spirals benefit Strong Tapes are extended in the same direction, and Number Ge define the holes Net by The Deng Net Strip, the holes the Mei Ge Net all small what 9.0mm 2 of Mian Plot, The spirals mend the Guide journeys angle that Strong Tapes have 3 ~ 30 degree of Jies Ge what, the Luo Xuan Ring Ditch collect section with a Ge O Jin The Net tube walls, and one Ge what The collect section Expansion sections of a Wai Bu Cone. The construction methods are Will The Guan Gai Net Guan Mai Let near the root of plant, can thereby improve the borders plant Sheng Long Ring.一種垂直地下灌溉施工法及灌溉網管,該灌溉網管包含一個界定出一個灌溉通道的網管壁、一條結合在該網管壁外周圍的螺旋補強帶,以及一個由該螺旋補強帶界定而成的螺旋環溝,該網管壁具有數個圍繞該灌溉通道的直網條、至少一條與該等直網條連結並與該螺旋補強帶同向延伸的螺旋網條,以及數個由該等網條界定而成的網孔,每個網孔的面積都小於9.0mm 2,該螺旋補強帶具有一個介於3~30度的導程角,所述螺旋環溝具有一個鄰近該網管壁的收束段,以及一個位於該收束段外部的錐擴段。該施工方法是將該灌溉網管埋設在植物之根部附近,藉此可改善植物的生長環境。1‧‧‧灌溉網管10‧‧‧中心軸線11‧‧‧網管壁111‧‧‧直網條112‧‧‧螺旋網條113‧‧‧網孔12‧‧‧螺旋補強帶121‧‧‧固定基部122‧‧‧徑突部14‧‧‧螺旋環溝141‧‧‧收束段142‧‧‧錐擴段2‧‧‧長度方向θ‧‧‧導程角L‧‧‧半厚度H‧‧‧環溝深度
