Great Hdpe Geomembrane

Product description

HDPE geomembranes are waterproof barrier materials made from high-density polyethylene with a density of ≥0.94 g/cm³. They are widely used in seepage control projects such as municipal solid waste landfills, wastewater treatment systems and artificial lakes, covering the fields of environmental protection, water conservation and municipal construction. UV protection is achieved through the addition of anti-aging agents and carbon black, which provides ultra-low permeability of 1×10⁻¹⁷ cm/s. Resistant to acid and alkali corrosion, withstands more than 80 chemical environments and has a service life of over 50 years.

The material has a tensile strength of 28 MPa and an elongation at break of 700%, as well as resistance to puncture and environmental cracking. It operates effectively in an ambient temperature range of -60°C to +60°C. Installation is carried out using hot welding technology, requiring strict control of overlap width and temperature standards. Composite structures (one fabric-one film/two fabrics-one film) increase the stability of the project. The product complies with GB/T17643-2011 standards covering thickness specifications from 0.25mm to 3.0mm, and supports custom requirements such as smooth or textured surfaces.

Advantages

1. Simplicity of design: just dig a pond and level the surface; no concrete foundation required.

2. Fast Installation: Eliminates the curing period required for structural concrete.

3. Resistance to foundation deformation: HDPE geomembranes have excellent elongation at break, which allows them to withstand foundation settlement or deformation.

4. Excellent performance: This is the most significant characteristic of HDPE geomembranes;

5. Reversibility: This is the most noticeable feature of HDPE geomembranes. After use, they can simply be rolled up, the pool filled, and restored to its original condition.

Construction process

I. Sequence of work

● Excavation for foundation

● Application of a protective layer of solution to the bottom of the lake (H20-30 mm)

● Cutting, compaction and leveling of the slope

● Bonding a composite geomembrane to a vertical water retaining wall

● Leveling the base surface, cleaning and transferring the object

● Sealing and waterproofing of underwater pipeline

● Laying and welding of composite geomembrane

● Transfer of object

● Checking the quality of welding and repairs

● Final acceptance

II. Project overview

1. Maximum estimated water level: approximately 0.6 m.

2. Total area of waterproofing works: approximately 800 m².

3. Water-retaining wall built from expanded clay concrete bricks.

4. There are flooded pits.

III. Basic waterproofing materials

1. Rolls of composite geomembrane, characteristics: 50×4 m; 150 g/m²/0.5 mm/150 g/m².

2. Rubber gutter tapes GB.

IV. Foundation condition

1. After the foundation has been formed and excavated, the slope must be trimmed, leveled, compacted, or tamped. The excavated soil must be replaced and backfilled in layers no more than 400 mm thick, with watering and compaction between layers.

2. Remove all exposed objects from the foundation surface that pose a puncture hazard, including bricks, stones, tiles; shards of glass and metal; branches, plant roots, etc. Remove obstacles from the area to ensure the necessary conditions for installation.

3. Perimeter retaining walls, pump wells, bridge foundations, and underwater pipe openings must be installed and reserved before installing the composite geomembrane.

V. Welding and assembly techniques

1. Welding techniques

① Overlap width: 80–100 mm; natural folds on horizontal and vertical surfaces: 5%–8% respectively; expansion allowance: 3%–5%; trim allowance: 2%–5%.

② Hot welding temperature: 280-300°C; Travel speed: 2-3m/min; Double seam welding configuration.

③ Repair method for damaged areas: cut out pieces of identical material, connect them by hot welding and seal them with polyethylene glue.

④ Joints without fabric reinforcement at welding points must be mechanically stitched.

⑤ Sealing of underwater pipe openings: Use GB rubber gutter tapes wrapped with metal and protected from corrosion.

2. Styling technique

① Direction for laying and unrolling the composite geomembrane: move from east to west or from west to east. The installation length of each section must include the height of the water retaining wall on both sides, completed in one pass.

② Laying sequence: move from the axis of the channel to the southern and northern sides.

③Construction sequence: First apply a protective layer of mortar (20-30mm) for the composite geomembrane to the lake bottom, then glue it to the vertical water retention wall.

④ Process of bonding composite geomembrane to retaining walls: Apply adhesive to the bonding surfaces of the geomembrane and retaining wall. Allow the glue to dry and settle for about 5 minutes before gluing, pressing and smoothing. The adhesive is a mixture of asphalt emulsion, cement and water. After gluing, secure with rivets above the water level and apply a waterproof and anti-corrosion coating.

VI. Quality acceptance

1. Composite geomembrane materials and structures shall comply with the national standards for polyethylene geomembranes and composite geomembranes issued by the State Administration for Market Regulation.

2. Construction quality acceptance includes self-inspection by the construction company and selective inspection by the contracting organization.

3. Weld quality testing is performed using the "inflation pressure method," and damage repair is performed using the "visual inspection method." The inflation pressure test value is 0.06 MPa.

4. The quality acceptance process includes handover procedures between work stages and final acceptance upon completion of the work.

5. Normal seepage rate for artificial lakes: ≤15 mm/24 h (including seasonal evaporation losses).

VII. Construction schedule

1. Daily productivity: one unit can cover 2000-2500 m² per day.

2. Planned construction period: 3 days.

VIII. Recommendations

1. Strengthen the protection and management of composite geomembrane products while increasing waterproofing awareness among construction personnel. This is critical to ensure project quality and timely commissioning.

2. The contractor must notify and assign dedicated personnel to supervise workers handling waterproofing materials. Any damage to composite geomembranes must be immediately reported to waterproofing crews for repair.

3. Avoid contamination of composite geomembranes with oil, as this will reduce their bond strength. Storage and protection procedures are described in detail in "Introduction to Geomembrane Construction Methods."

4. Key points to consider when implementing this project:

① After welding composite geomembranes into finished products, first apply a protective layer of solution to the lake bottom.

② For waterproofing of bridge foundation, use the method of welding reinforcement through a membrane with a protective layer of mortar to reduce the risks associated with the quality of welding work.

③ When bonding composite geomembranes to walls, prevent the formation of large voids.

Application scenarios

1. HDPE geomembranes are suitable for use in environmental protection and sanitation applications, such as landfills, wastewater treatment plants, power plant control ponds, solid waste disposal from industrial plants and hospitals, etc.

2. HDPE geomembranes are suitable for water conservancy projects: such as seepage prevention, leakage sealing, embankment reinforcement of rivers, lakes, reservoirs and dams; seepage prevention in canals; vertical core walls; slope protection, etc.

3. Municipal construction: subway systems, underground building foundations, green roofs, roof gardens and sewer leak prevention;

4. Landscape architecture: artificial lakes, waterways, reservoirs, ponds on golf courses, slope protection and waterproofing/dampproofing of landscape lawns;

5. High density polyethylene geomembranes for petrochemical industry: chemical plants, oil refineries, oil seepage prevention from storage tanks, chemical reaction tanks, sump lining, secondary lining, etc.;

6. Polyethylene geomembranes for mining applications: washing and screening ponds, heap leach ponds, ash disposal areas, dissolution ponds, settling ponds, storage areas, tailings pond lining, seepage prevention, etc.;

7. Low-density polyethylene membranes are suitable for transport infrastructure: strengthening highway foundations and sealing culverts;

8. HDPE geomembranes are suitable for agricultural applications: sealing of reservoirs, drinking water tanks, storage ponds, waste treatment areas and irrigation systems;

9. HDPE geomembranes for aquaculture: intensive and industrialized agricultural ponds, fish ponds, shrimp ponds (lining), slope protection of sea cucumber enclosures, etc.;

10. HDPE geomembranes for salt production: salt field crystallization ponds, brine pond linings, salt membranes, plastic linings for salt ponds.

Company Profile

Shandong Yuanpeng Environmental Protection Technology Co., Ltd was founded in 2022 with a registered capital of 50 million, more than 300 employees, covers an area of 35,000 square meters, equipped with professional technical R&D teams, is a comprehensive enterprise integrating production, sales and after-sales service.

Some production lines have achieved fully automated operation. Annual sales reached RMB 120 million, and the company has established long-term, friendly partnerships with CREC, CSCES, CCCC, MCC Group, POWERCHINA, Tongyuan Design Group, CSMDI, BMEDI, and other companies.