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3Selection items
6Steps
1FAQs
GBStandards cited
Summary: Tailings pond liners follow GB 39496-2020 (mandatory safety code, replacing withdrawn AQ 2006-2005) and GB 50863-2013: textured HDPE membrane 1.5-2.0 mm with geotextile protection and drainage layers; textured surfaces keep the liner system stable on dam slopes.
Selection Table
| Position / function | Recommended material | Standard |
|---|---|---|
| Basin primary liner | 1.5-2.0 mm textured HDPE | GB/T 17643-2025 |
| Under-membrane protection | 400-600 g/m2 filament geotextile | GB/T 17639-2023 |
| Seepage drainage | Composite geonet + blind ditches | GB/T 40441-2021 |
Installation Steps
- Clear and treat basin base, replace soft zones
- Lay under-membrane protection by zones
- Unroll textured membrane from dam crest inward
- Double-seam welding with 100% air pressure test, anchor at dam shoulders
- Lay protection and drainage layers
- Install seepage collection and water-level monitoring, hidden acceptance
