Sponge City Construction, Buried Drainage Carat Tube Supply

The construction of sponge cities is moving from concept to large-scale implementation, and its core is to make the city as elastic as a sponge to absorb and release rainwater. In this system, the buried drainage pipe network is an invisible "capillary", and the stable supply of carat pipes, as the main pipe for large-diameter gravity flow drainage, is directly related to the success or failure of rainwater storage and staggered discharge.

Carat pipe, that is, high-density polyethylene structural wall hot winding pipe, with its unique T-shaped plate and strip spiral winding process, inherently has the advantages of high ring stiffness and lightweight durability. In sponge city applications, it is not simply over-flowing, but bears the combined functions of rainwater retention, rapid transmission and partial purification infiltration. The tightness of the pipe is particularly critical. The hot-melt welded interface makes the entire pipe network form a seepage-free closed system, which can not only prevent rainwater exfiltration from hollowing out the roadbed, but also isolate groundwater reverse osmosis and protect the water quality of reused rainwater.

The reliability of the supply chain is based on rigorous standardized production. High-quality carat pipes follow the requirements of resistance to slow crack growth from the selection of raw materials, ensuring a service life of more than 50 years under complex underground stresses. The reinforced rib design embedded in the pipe wall enables it to withstand dynamic traffic loads under green belts and sunken plazas with shallow soil. For the common collapsible loess or soft soil foundation in sponge cities, the supplier needs to provide a differentiated ring stiffness selection plan to avoid local settlement leading to interface displacement.

The current modular prefabrication and fast-response logistics system allows the supply of carat tubes to precisely match the phased construction rhythm of sponge city projects. From the perforated collection tubes at the bottom of the rain garden to the backbone drainage culverts connected to the municipal pipe network, different specifications of carat tubes are highly resistant to impact and corrosion, enabling rapid trench backfilling without the need for a concrete foundation. This ease of construction greatly shortens the on-site cycle and reduces the disturbance to the surrounding built sponge facilities.

A truly professional supply of buried water carat pipes delivers not only pipes, but also a complete set of drainage solutions deeply coupled with hydrological calculations. It requires accurate calibration of the roughness coefficient and flow capacity of the pipeline to ensure that the entire sponge system can still be calmly absorbed and discharged in an orderly manner during the return period of rainstorms. Choosing a stable and reliable supply of carat pipes is to lay a long-term guarantee for the water ecological security of the city.