Composite Geomembrane The Ideal Geosynthetic Material for Hydraulic Engineering and Sanitation Projects
Introduction
Composite geomembrane is a type of geosynthetic material made by combining geotechnical fabrics (or fiberglass mesh) with high molecular materials such as PE film, EVA, etc. It combines the water permeability of geotechnical fabrics with the impermeability of high molecular materials, and is produced through processes like calendering and hot-melt coating, possessing multiple functions such as impermeability, protection, and reinforcement.
Structure and Classification
The main structures of composite geomembranes include one fabric and one membrane, two fabrics and one membrane, two membranes and one fabric, etc. Among them, "fabric" refers to geotechnical fabric, while "membrane" is a synthetic polymer material such as high-density polyethylene (HDPE), low-pressure polyethylene (LDPE), chlorinated polyethylene (CPE), EVA (ethylene copolymer), PVC, etc.
Application Scenarios
The application fields of composite geomembranes are very extensive, mainly including:
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Hydraulic Engineering: Such as river channel seepage prevention projects, river management projects, artificial lake seepage prevention projects, landscape lake seepage prevention projects, dyke seepage prevention projects, canal seepage prevention projects, etc.
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Environmental Protection and Sanitation: Effectively address the issue of urban solid waste polluting the environment, preventing continuous environmental pollution.
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Municipal Engineering Construction: Such as soft soil foundation reinforcement and drainage, etc., various types of impervious engineering.
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Oil and Chemical Systems: Such as chemical wastewater pond impermeability, refinery wastewater pond impermeability, electroplating acid washing pool impermeability and anticorrosion, etc.
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Traffic Facilities: Such as impervious drainage reinforcement under the roadbed, seepage prevention and reinforcement of culverts and tunnels, groundwater drainage, and circuit moisture protection.
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Channel Seepage Prevention Project: Due to its excellent seepage prevention performance, composite geomembrane is widely used in channel seepage prevention projects.
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Landfill: In landfills, composite geomembranes can effectively prevent the leakage of leachate, protecting the environment.
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Artificial Lakes and Underground Projects: Due to its weather resistance and durability, composite geomembranes are also commonly used for waterproofing in artificial lakes and underground projects.
Structure and Classification
The composite geomembrane is mainly divided into two types:
Construction Method
The construction methods of composite geomembrane include:
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Burial Method: Bury the composite geomembrane in the soil, cover it with fine sand, and compact it.
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Welding Method: Connect the various parts of the composite geomembrane through thermal fusion welding or extrusion welding.
Advantages and Application Advantages
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High Intensity: Exhibits good tensile strength and tear resistance.
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Durability: Under normal conditions of use, the service life can reach 50-70 years.
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Environmentally Friendly: Suitable for environmental protection projects such as landfills and artificial lakes, reducing the impact on the environment.
To sum up, the composite geomembrane, with its excellent impermeability and wide range of applications, has become one of the indispensable materials in modern civil engineering construction.
Product Specification
Product Specification and Technical Index (GB/T 17642-2008)
| Item |
Specifications |
Remark |
| Geotextile Unit Weight (g/㎡) |
300 |
500 |
600 |
700 |
800 |
900 |
1000 |
1100 |
|
| Geomembrane Thickness (mm) |
0.25-0.35 |
0.30-0.50 |
|
| Nominal Fracture Strength (KN/m) |
2.50 |
7.50 |
10 |
12 |
14 |
16 |
18 |
20 |
|
| Breaking Strength (KN/m,≥,LD/TD) |
2.50 |
7.50 |
10 |
12 |
14 |
16 |
18 |
20 |
|
| Standard Intensity Corresponding Elongation Rate (%) |
30~100 |
|
| CBR Burst Strength (KN,≥) |
0.70 |
1.50 |
1.90 |
2.20 |
2.50 |
2.80 |
3.00 |
3.20 |
|
| Longitudinal Tear Strength (KN,≥) |
0.05 |
0.25 |
0.32 |
0.40 |
0.48 |
0.56 |
0.62 |
0.70 |
|
| Hydrostatic Pressve (Mpa) |
See List Below |
|
| Peel Strength (N/cm,≥) |
6 |
|
| Vertical Permeability Coefficient (cm/s) |
According to design or contract mentioned. |
|
| Width Variation (%) |
-1.00 |
|
| |
Specification
Item |
Geomembrane Thickness (mm) |
Remark |
| 0.20 |
0.30 |
0.40 |
0.50 |
0.60 |
0.70 |
0.80 |
1.00 |
| Hydrostatic Pressve (Mpa) |
One geotextiles with one geomembrane |
0.40 |
0.50 |
0.60 |
0.80 |
1.00 |
1.20 |
1.40 |
1.60 |
|
| Two geotextiles with one geomembrane |
0.50 |
0.60 |
0.80 |
1.00 |
1.20 |
1.40 |
1.60 |
1.80 |
|
Product Tags:
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Composite Geomembrane The Ideal Geosynthetic Material for Hydraulic Engineering and Sanitation Projects Images
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