Tell me about the double wall wave patternhdpe water supply pipeKey points of road repair

1. After the double-wall wavy hdpe water supply pipeline is laid, the wall thickness is partially destroyed due to unexpected factors. When the total area or gap size and total width of the damaged position do not exceed the scope, adhesive repair measures can be adopted.

2. When the hole diameter or circumference of the damaged part of the double-wall wavy hdpe water supply pipe wall shall not exceed 20mm, polyvinyl chloride plastic can be used to bond organic solvent, and an annular plate made of the same material as pipe fittings with a hole diameter of not less than l00mm can be pasted outside.

3. When the partially damaged hole with wall thickness is 20~100mm, polyvinyl chloride plastic can be used to bond organic solvent, and an annular plate made of the same material as pipe fittings and not less than the hole specification plus l00mm can be pasted outside.

4, wall thickness part of the gap, when the gap length shall not exceed 1/12 of the pipe diameter, can be pasted from the gap length exceeds the gap length plus 100mm, the total width of not less than 60mm and pipe fittings of the same material plate, plate should be cut into arc on both sides.

5. Before repair, the water in the pipeline shall be removed, a part of the damaged wall thickness shall be removed and repaired with a shovel blade, and the tap water shall be cleaned up. For special-shaped wall pipes, ribs within the subsidy scope shall be removed, and then polished with sandpaper or a bruise knife shall be replaced.

6. Before bonding, cyclone should be used to brush the bonding position reference surface. After drying out, the organic solvent should be painted and bonded as soon as possible. The board used for external bonding should be used. For the arc board laser cut from the corresponding position of the same pipe through the pipe fitting, the inner side of the outer layer of wood must be cleaned first. Cyclone should be selected to paint the reference surface and then the organic solvent should be painted and bonded.

7. For holes that shall not exceed 20mm, non-woven geotextile can be wrapped and fixed after pasting, and soil can be retreated after 24 hours of drying. For holes and gaps over 20mm, galvanized iron wire can be used to bind and fix them after pasting.

8. After the pipeline repair is completed, the hollowed-out position at the bottom of the pipeline must be backfilled with coarse sand according to the provisions of supporting an angle.

9, the damaged pipeline repair measures, the construction enterprise should obtain the permission of the management department and on-site supervision personnel in advance.

10, such as the selection of welding wire repair welding or organic chemical waterproofing agent and other repair measures, must be approved by the management method unit before implementation.

11. When the size of the damaged position of the pipeline exceeds the relevant provisions of the above clauses, the damaged pipeline shall be replaced first. When PE double-wall metal corrugated pipe is replaced and there is no special connecting pipe in the middle of the paved pipeline, the wall sewage inspection well or connection well can be built.