Permeation tube for constructing sponge city

The invention discloses a permeation tube for constructing a sponge city. The permeation tube comprises a PVC (Polyvinyl Chloride) tube provided with a plurality of through holes, wherein a filtering screen is arranged on the through holes; a porous material fills the periphery of the PVC tube; the porous material is coated with first permeable geotextile; and the first permeable geotextile is coated with a nano-titanium oxide coating. The permeation tube with a dual-layer structure can be used for effectively absorbing and slowly releasing rainwater; and in addition, the phenomenon of blockage of the permeation tube due to the fact that mud and sand or grass and trees enter the permeation tube can be effectively prevented. 本发明公开的种海绵城市建设用渗透管，包括设有若干通孔的PVC管，所述通孔上设有滤网，所述PVC管四周填充有多孔材料，所述多孔材料外包有第透水土工布，所述第透水土工布上涂覆有纳米氧化钛涂层。该双层结构的渗透管，能有效的对雨水进行吸纳、缓释，且能有效的防止泥砂或者草木进入渗透管，造成渗透管的堵塞。