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Key facts
Composite liner system per GB 16889-2024: groundwater drainage layer, GCL or compacted clay auxiliary barrier, HDPE primary membrane (smooth on base, textured on slopes, ≥1.5 mm), leachate drainage layer and protection geotextile.
Configuration must be confirmed by project design documentsMaterial Configuration by Layer
| Layer | Recommended material | Function / rationale |
|---|---|---|
| Groundwater drainage | Drainage geocomposite + filter geotextile | Relieves uplift under the liner |
| Auxiliary barrier | GCL or compacted clay | Self-healing redundancy |
| Primary liner (base) | Smooth HDPE ≥1.5 mm | Main containment |
| Primary liner (slope) | Textured HDPE ≥1.5 mm | Interface friction against sliding |
| Leachate drainage | Drainage geocomposite / gravel | Collects and removes leachate |
| Protection | Filament geotextile + cover soil | Prevents mechanical damage |
| Note: configurations are common practice; the final system and specifications must follow the project design documents and governing codes. | ||
Products Used in This System
Frequently Asked Questions
Minimum membrane thickness?
Base and slopes typically ≥1.5 mm; ≥2.0 mm for high stacks or strict requirements; closure cover around 0.75 mm, per GB 16889-2024 and the design.
Why textured on slopes?
Textured surfaces raise interface friction, the key control against sliding of the liner system under waste load and leachate level changes.
Project enquiry | Municipal Solid Waste Landfill Lining
Send the project type, site conditions, design requirements and quantities to receive a project-specific configuration and quotation.