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1. The pipeline of PE double wall corrugated pipe shall be laid in parallel. If the soft socket curve must be used for laying under special circumstances, the allowable corner of the longitudinal center line of adjacent two sections of pipe shall not exceed 2 °.

2. It shall be laid on the original land resource base or the geological structure of the compactness of the backfill after grooving. When the pipeline is under the motorway, the thickness of the filling on the pipe top shall not be less than 0.7m.

3. When the pipeline of PE double wall corrugated pipe crosses the railway line, high-grade pavement embankment, buildings and other obstacles, the maintenance casing made of building reinforcement, pig iron and other raw materials shall be set, the inner diameter of the casing shall exceed the diameter of the metal corrugated pipe by more than 200mm, and the casing design scheme shall also be implemented according to the relevant requirements of the embankment.

4. In the area where the water level is higher than the elevation of the trench bottom of the foundation pit excavation, the Countermeasures of reducing the underground water level shall be adopted under the condition of engineering construction to avoid the loss of stability of the trench. The pipeline construction can be carried out when the underground water level drops to the bottom point of the trench bottom is 0.3m-0.5m. During the whole process of installing backfill, there shall be no water storage or bubble tank cooling at the trench bottom.

PE double wall corrugated pipe is actually a new type of pipe fitting with annular structure surface and smooth inner cavity. When selecting the type of double wall bellows, it shall be selected according to the difference between the technical standards and the standards of industrial chain resources and urban planning and construction.