Large Landfill Anti-Seepage Project – 7-Layer Composite Liner System

Project Overview

A reliable landfill liner system is essential for protecting groundwater, controlling leachate migration, and ensuring long-term environmental safety.

This large landfill project features a multi-layer anti-seepage system designed to provide effective containment, drainage, and protection. The system integrates high-performance geosynthetic materials with an engineered soil foundation to support demanding landfill applications.

Seven-Layer Liner System

The system consists of the following layers, arranged from top to bottom:

Layer 1 – Waste Body
Municipal solid waste and other approved waste materials.

Layer 2 – Leachate Collection and Drainage Layer
A 300–500 mm gravel or crushed stone drainage layer with perforated HDPE drainage pipes to collect and discharge leachate.

Layer 3 – 600 g/m² PET Filament Geotextile
A nonwoven filament geotextile designed to provide cushioning and protection against mechanical damage to the underlying liner system.

Layer 4 – 6 mm Composite Drainage Net
A three-dimensional geocomposite drainage layer designed to facilitate liquid flow and support efficient drainage.

Layer 5 – 2.0 mm HDPE Geomembrane
The primary anti-seepage barrier, providing excellent impermeability and chemical resistance for landfill containment applications.

Layer 6 – GCL (Geosynthetic Clay Liner)
A sodium bentonite-based waterproofing layer that provides additional seepage control as part of the composite liner system.

Layer 7 – Compacted Soil Foundation
A prepared, levelled, and compacted subgrade providing stable support for the liner system.

Key Project Benefits

• Groundwater Protection: Helps prevent leachate from migrating into the surrounding soil and groundwater.

• Reliable Containment: The 2.0 mm HDPE geomembrane serves as the primary barrier against liquid seepage.

• Enhanced Liner Protection: The 600 g/m² filament geotextile helps protect the geomembrane from mechanical damage.

• Efficient Drainage: The drainage layer and composite drainage net facilitate leachate collection and discharge.

• Additional Seepage Control: The GCL provides a supplementary barrier within the composite liner system.

• Long-Term Environmental Performance: A properly designed, installed, and maintained liner system supports safe and reliable landfill operation.

Applications

This type of composite liner system can be considered for:

• Municipal solid waste landfills

• Industrial waste containment facilities

• Mining tailings storage facilities

• Environmental protection and waste management projects

• Other engineered containment applications

Your Geosynthetic Materials Partner

Shandong Hengyang New Materials Co., Ltd. specializes in manufacturing HDPE geomembranes, filament geotextiles, composite drainage nets, geosynthetic clay liners (GCL), and other geosynthetic materials for environmental protection and infrastructure projects.

We provide factory-direct products, technical consultation, and customized material solutions to meet different project requirements.

Whether you are a contractor, engineering consultant, importer, or distributor, we welcome the opportunity to support your next containment project.

Contact us to discuss your project specifications and geosynthetic material requirements.

Website: https://www.hengyanggeo.com/

Engineering note: The final liner configuration, material specifications, and layer thicknesses should be verified against the project design, site conditions, applicable regulations, and relevant engineering standards.