PVC Drainage Pipe Construction Buried Requirements-Underground Drainage Systems

Construction Buried Requirements

1. Before the subgrade construction of the subgrade unit, the horizontal middle belt drainage pipe shall be buried.

2. Slotting: Manual slotting is carried out according to the design pile number position measured by the drawing design and measurement personnel. The width of the PE pipe groove is slightly wider than the pipe diameter by 1~2 cm, and the groove depth is 23 cm below the surface of the roadbed. The groove length It is required that the inner side is 10 cm away from the center line, the outer side is extended to the side slope, and the excavation section is extended to the inner wall of the side ditch. The slope of the groove should follow the horizontal drainage slope of the road, and must not reverse the slope to ensure that the water in the road is discharged to the outside of the subgrade. Pull the wire to make sure it is straight.

3. Takeover: The two interfaces of each PVC pipe must be tightened with rubber rings to avoid water leakage.

4. Downpipe: After cleaning the bottom of the groove and connecting the pipe according to the length of the track, put the pipe into the track, and tie the mouth with sackcloth at the end of the central dividing belt to prevent debris from entering the pipe and causing the blockage.

PVC DRAINAGE PIPE FITTINGS

5. Backfilling: Select the fine-grained soil excavated for backfilling, or use sandy soil for backfilling. Large stones must be removed. After backfilling, manual compaction must be performed. The top surface of the backfill soil should not be higher than the roadbed and should be 1~ 2 cm appropriate, otherwise, it will be crushed by the vehicle and unable to get out of the water.

6. Cleaning: The remaining soil after backfilling should be transported out immediately, and the road surface should be cleaned. The remaining soil of PE pipes should be unloaded in designated places such as borrow yards, and should not be unloaded on the road at will.

7. After the construction of the sub-base of the fill section, on the brushed slope, at the water outlet according to the design size, cast a trapezoidal water outlet backing plate. And nail into 3 bamboo sticks 25 cm long for stability.

8. Pay attention to ensuring that there is a drainage pipe at the lowest point of the vertical curve of the route to ensure that the road surface does not accumulate water. The ultra-high pressure pipe is required to be buried in the filled ultra-high road section after the roadbed is checked, the loft should be measured and staked in time according to the position designed in the drawings. Determine the position of the pipeline and the well, manually cooperate with the small excavator to make the groove, the slope of the bottom of the groove meets the design requirements to ensure smooth drainage, the groove width is not less than 47cm, and the excavated waste residue is removed in time. For the square section, to ensure the thickness of the soil covering the top of the pipe and to ensure that the PVC pipe is not crushed, the bottom of the groove is lowered by 20 cm. In the super-high subgrade of the stone excavation section, the back excavation construction is performed after the sub-base is completed.

PVC Underground Drainage Pipe

Application

PVC drainage pipes have been more and more widely used in various industries. The main material of PVC drainage pipes is polyvinyl chloride. Polyvinyl chloride has a strong heat resistance and corrosion resistance, which is why polyvinyl chloride for its widespread use.

For the purpose of making the facade of the building more beautiful, the indoor rainwater drainage system is more and more widely used. The indoor rainwater pipeline is generally designed according to the unpressurized flow, but because the rainwater flow is sometimes large and concentrated, the pipelines are simultaneous. There are two states of gravity flow and pressure flow, so the indoor rainwater pipeline is required to have stronger pressure resistance than other drainage pipelines.

PVC Drainage Pipe

PVC drainage pipe is a substitute for traditional drainage pipes and has better physical and chemical properties. Its inner wall is smooth, and its frictional resistance is smaller than that of conventional drainage materials, so the installation slope of the transverse pipe is smaller, which can improve the indoor clear height of the building.

At the same time, the PVC underground drainage pipe is light in weight, one-fifth of the cast iron pipe, and is easy to transport and operate; it adopts an adhesive connection, which is convenient for installation and maintenance; the price is lower than that of conventional drainage pipes, which greatly reduces the project cost; strong corrosion resistance, It is widely used in construction sewage and rainwater pipeline systems.

In addition, the widespread use of PVC drainage pipes is conducive to saving steel, which is of great significance for alleviating the shortage of steel in my country. Compared with cast iron pipes and steel pipes, UPVC drainage pipes have the disadvantages of low pressure and weak impact resistance. In addition. Although upvc drainage pipe is a flame-retardant material, for indoor exposed pipes, there is a possibility that the fire will spread upward along the drainage riser.