1, HDPE corrugated pipe laying, due to accidental factors caused by local damage to the wall, when the damaged parts of the area or the length of the crack and the width does not exceed the provisions, can take adhesive repair measures.

2, HDPE corrugated pipe wall of the local damage to the hole diameter or side length of not more than 20mm, the use of PVC plastic adhesive solvent in its external paste diameter of not less than l00mm and pipe the same material of the circular plate.

3, the local wall damage hole 20 ~ 100mm, the use of PVC plastic adhesive solvent in its external paste is not less than the maximum size of holes plus l00mm and pipe the same material of the circular plate.

4, the wall of the local cracks, when the crack length is not greater than the tube circumference of 1/12, the length of its cracks can be pasted more than the length of the crack plus 100mm, the width of not less than 60mm and pipe the same material plate, Cut into a circular arc.

5, the repair should be preceded by the pipeline to remove the water, with a scraper tube wall damaged part of the tick-level dressing, and clean with water.For the special-shaped wall tube, must be covered within the range of ribs removed, and then sandpaper or file polished.

6, the adhesive should be used before the first part of the ketone brush with adhesive base surface, to be dry as soon as possible after brushing the adhesive solvent for paste.External paste plate should be used from the same pipe diameter of the corresponding parts of the arc Plate outside the plate inside the same must first clean, with cyclohexanone brushing the base surface and then brushing the adhesive solvent.

7, on the hole is not greater than 20mm, after the completion of the paste, the geotextile can be wrapped around the fixed, 24 hours after curing can be soil; for more than 20mm holes and cracks in the paste is completed, the use of lead wire bandage fixed.

8, in the pipeline repair is completed, the bottom of the pipe must be hollowed out of the requirements of the requirements of the use of coarse sand backfill dense.

9, the damaged pipeline to take remedial measures, the construction unit should obtain the consent of the management unit and site supervisors in advance; on the bottom of the tube in the damage, but also to obtain the consent of the design unit before implementation.

10, such as the use of electrode welding or chemical sealing agent plugging repair measures, must obtain the consent of the management unit before implementation.

11. When the size of the damaged part of the pipeline exceeds the provisions of the above provisions, the damaged pipe section shall be replaced. When there is no special connection between the PE double-wall corrugated pipe and the already laid pipe, the masonry check hole or connection Well connected.

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