Research and Application of Double High Reinforcement Polyethylene (HDPE) Wrapped Pipe in Weak Expansion Soil Municipal Drainage Network

• 1、China Communications Southwest Urban Development Co., Ltd

Abstract：Municipal drainage engineering plays an important role in enhancing urban flood resistance and improving the living environment. The selection of pipeline systems in drainage engineering is crucial for ensuring the long-term stable operation of drainage infrastructure. Due to the characteristics of the soil in weakly expansive soil areas, there are additional challenges in selecting pipeline materials. Traditional pipeline materials such as concrete and metal pipes may face problems such as corrosion, unstable soil properties, and construction complexity in weakly expansive soil areas. Double high reinforcement polyethylene (HDPE) wrapped pipe, as a new type of material, has gradually become an important choice in municipal road engineering due to its superior corrosion resistance, flexibility, and compression resistance. Due to its unique soil properties and the swelling force generated by water absorption, weakly expansive soil has a significant impact on municipal pipe materials. The unique winding structure and high-density polyethylene material of HDPE pipe material make it perform well in complex environments and effectively respond to soil geological changes and natural disasters in weakly expansive soil areas. In addition, the lightweight and flexibility of HDPE pipes make the construction process simpler, reduce installation costs and time, and improve the overall efficiency of the project. Widely used in municipal drainage engineering of weakly expansive soil.

Keywords： Municipaldrainage engineering Weak expansive soil Double high reinforcement polyethylene (HDPE) wrapped pipe