Key Components:
Material Selection – Use high-quality geotextile fabrics (e.g., non-woven or woven polyester) with strong permeability resistance.
Base Preparation – Clean and level the tunnel surface, ensuring no sharp protrusions that could damage the geotextile.
Installation – Lay the geotextile in overlapping sections (typical overlap ≥50 cm), secured with mechanical fasteners or thermal bonding.
Seam Treatment – Seal joints with waterproof tape or welding to prevent leakage paths.
Protection Layer – Cover with a concrete spray layer or protective membrane to shield against mechanical damage.
Drainage Integration – Coordinate with drainage systems (e.g., geocomposites or pipes) to manage seepage water.
Standards:
Compliance with ASTM D6768 (geotextile durability) and ISO 12958 (hydraulic performance).
Let me know if you'd like to emphasize specific details (e.g., material specs, regional standards)!
