Convenient construction carat pipe, trenchless engineering suitable pipe

In the construction of municipal drainage and sewage pipe networks, trenchless technology is favored because of its small damage to pavement and short construction period. Pipes suitable for this construction method not only require excellent mechanical properties, but also place high demands on construction convenience. High-density polyethylene winding reinforced pipes, which are often referred to as carat pipes in the industry, are pipes that show unique adaptability under this demand.

The construction convenience of the carat tube is first and foremost due to its lightweight structure. Compared with the traditional concrete tube, the weight of the same caliber is greatly reduced, and the dependence on large lifting equipment for on-site backhaul and downpipe operations is significantly reduced. In narrow streets or renovation projects, this advantage is particularly prominent, which can effectively reduce the cost of mechanical tables.

The connection method is the key to the adaptation of trenchless engineering. Carat tubes generally use socket-type electrofusion connection or socket-type sealing ring flexible connection. The socket is prefabricated in the factory with high precision, and can be quickly docked without large-scale excavation on site. The electrofusion connection is heated and melted through the embedded resistance wire, so that the interface is integrated, and the water closure performance is reliable; the flexible connection allows a certain angle of deflection, which can better adapt to the micro-settlement of the formation. Both methods greatly simplify the operation steps underground or in the trench. The single-port connection time is short, the quality is controllable, and the human operation error is reduced.

From the perspective of the pipe structure, the carat tube adopts a hot winding molding process, and the pipe wall is composed of a flat inner wall and a special-shaped structure wall. This design obtains higher ring stiffness with less material, which can resist the circumferential pressure and surrounding soil load generated by back dragging or jacking in trenchless construction. At the same time, the high-density polyethylene material itself has good impact toughness and chemical corrosion resistance. When transporting domestic sewage or industrial wastewater, the inner wall is smooth and not easy to scale, and the long-term flow capacity is stable.

In trenchless repair and new construction projects, the length of the carat tube can be flexibly customized according to the transportation conditions, reducing the number of interfaces and further improving the laying efficiency. Its comprehensive construction cost and long-term operation and maintenance advantages make it a pipe scheme worthy of priority evaluation in municipal trenchless projects. Through reasonable selection and standardized construction, the carat tube can help the builder achieve a multi-dimensional balance of construction period, quality and cost.