Construction of Anti-Seepage Geomembrane for Dams
Release time:
Apr 21,2025
Site Preparation
Clean and level the dam surface, removing sharp objects or debris.
Compact the subgrade to ensure a smooth, stable base.
Geomembrane Installation
Unroll the geomembrane (e.g., HDPE, LDPE, or PVC) over the prepared surface.
Weld adjacent sheets using thermal fusion welding or extrusion welding to ensure seamless joints.
Perform non-destructive testing (e.g., air pressure or vacuum tests) to verify weld integrity.
Anchoring & Protection
Secure the geomembrane edges in anchor trenches or with ballast (e.g., gravel or concrete blocks).
Cover with a protective layer (e.g., geotextile or soil) to prevent UV degradation and mechanical damage.
Drainage Integration
Install drainage pipes/geocomposites beneath or above the geomembrane to manage seepage water.
Inspection & Maintenance
Conduct leak detection surveys (e.g., electrical methods) post-installation.
Regularly inspect for punctures or displacements during service life.
Key Terms:
Geomembrane: An impermeable synthetic liner (e.g., HDPE) used for fluid containment.
Anti-seepage: Designed to prevent water leakage in hydraulic structures.
Thermal Fusion Welding: A heat-based method to join geomembrane sheets.
Let me know if you need additional details (e.g., material specifications or ASTM standards)!
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