How to Repair Local Geomembrane Damage: Patch, Extrusion Welding or Panel Replacement

The process is selected according to the type, location and pollution of the defects and the quality record is verifiable.

Construction lessons

Customer pain points and project conclusions

Needle holes, small incisions, cross-sections, fractures and large-area contamination cannot be treated in the same way. Patches should cover the defective outer edges and use round corners; complex nodes should usually be replaced with squeezed pads, long-distance continuous defects or areas of severe ageing contamination. All repairs must be numbered, mapped and individually detected.

The process is selected according to the type, location and pollution of the defects and the quality record is verifiable.

Construction lessons

Procurement and Acceptance Checklists

The checkpointControl requirementsDelivery of evidence
The classification of defectsThe size, direction, location, pollutionDefects in photos and coordinates
Patch materialsThe same material and thickness, rounded corners, cover enoughBatch of materials
Re-examinationVacuum box/spark/point by pointRepair of the test table

Construction lessons

Steps to landing

  1. Clean and polishedThe water, soil and oxidation layer are removed and the width of the abrasion is controlled.
  2. Selecting the ProcessThe flat surface is small with patches and the knots are compressed.
  3. Re-examination of the coolingAfter complete cooling, the test is performed and the graph is entered.

Construction lessons

Common risks and addressing them

  • The water is soaked in the wetThe water vapor forms air vents and noise.
  • The tip of the patchThe stress concentration can easily tear itself apart from the tip again.

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