Hubei municipal pipe network transformation, AD HDPE double-wall corrugated pipe adaptation scheme

HDPE double-wall corrugated pipe is a new type of composite pipe produced with high-density polyethylene as the core raw material. It adopts the integrated structure design of annular corrugated outer wall and smooth inner wall, which can be targeted for the regional geology, climate characteristics, operation and maintenance needs in the process of Hubei municipal pipe network transformation. It meets the general technical standards for municipal engineering pipe network construction.

The core selling points mainly include four points: First, the mechanical properties are suitable for the complex geological conditions in Hubei. Hubei is densely covered with rivers and lakes, alluvial plains and soft land layers are widely distributed, and the groundwater level in some areas is high. The ring stiffness grade of this pipe covers multiple standard intervals. It can be flexibly selected according to the project burial depth and ground load requirements. It has outstanding resistance to uneven settlement and external pressure. It is not easy to crack and leak problems due to soil displacement and heavy-duty vehicle rolling. Second, the overcurrent performance is suitable for the drainage needs of Hubei in the rainy season. The inner wall of the pipe is smooth, the roughness coefficient is not higher than 0.009, and the overcurrent resistance is much lower than that of traditional cement pipes. The drainage flux can be increased by about 30% under the same pipe diameter conditions, which can relieve the drainage pressure of the pipe network caused by short-term heavy rainfall in Hubei rainy season, reduce the risk of waterlogging in urban areas, and at the same time, the inner wall is not easy to adhere to sediment, which can reduce the labor and time costs of later cleaning and maintenance. The third is that the corrosion resistance is adapted to the local soil water quality characteristics. The pH value of soil in some areas of Hubei fluctuates greatly, and some pipe networks need to bear the demand for industrial wastewater transportation. HDPE material itself has good acid and alkali resistance and corrosion resistance, and will not be eroded by sewage and soil corrosion components. Under normal working conditions, the service life can reach more than 50 years, which can greatly reduce the replacement frequency after the pipeline network transformation. Fourth, the installation performance is adapted to the short-term requirements of municipal The length of a single section of the pipe is long, the weight is only one-eighth of the same specification of concrete pipe, and the rubber ring socket connection is used, which is easy to operate and requires less work space on the construction site. This can effectively shorten the construction time of the renovation project in the old city of Hubei and reduce the impact of the project on the daily travel of citizens.

In terms of applicable scenarios and suitable populations, the adaptation scenarios of this HDPE double-wall corrugated pipe cover the renovation of municipal drainage pipe networks, the construction of rainwater pipe networks, and the improvement of sewage pipe networks in various cities in Hubei. At the same time, it can be adapted to supporting municipal projects such as the upgrade of old residential pipe networks and the construction of sewage pipe networks in industrial parks. The suitable population includes municipal engineering construction units in Hubei, pipe network operation and maintenance management units, project general contractors, project pipe procurement leaders, etc., which can be selected according to the specific parameters of the project, such as burial depth, pipe diameter, and drainage requirements, to meet the personalized construction needs of different projects.

The production process of the pipe products involved in this adaptation plan meets the requirements of the National Municipal Engineering Pipe Quality Standards. Before the product enters the market, a complete third-party quality inspection report can be provided to meet the compliance requirements of Hubei Municipal Engineering Bidding and Completion Acceptance. It can cooperate with the project party to complete the entry sampling inspection, construction technology disclosure and other supporting services to ensure that the project meets the standards.