High Performance Polyester Nonwoven Geotextile Pet Filament For Ground Engineering Applications
High Strength Geotextile Fabric Layer Non Woven is the permeable and durable textile materials widely used to separate, filter, reinforce, protect, retain or drain soil. They are usually made from a synthetic polymer such as polypropylene, polyester, polyethylene or polyamides and processed by woven, needle punched or heat bonded methods.
Geotextiles and related products are ideal materials for civil construction applications such as roads, harbors, reservoirs, canals, dams and many others retaining construction to improve soil stability, provide erosion control or aid in drainage
| No. | Value SPE. | 4.5 | 7.5 | 10 | 15 | 20 | 25 | 30 | 40 | 50 |
| Item |
| 1 | Break tensile strength (MD,CD) kN/m | 4.5 | 7.5 | 10.0 | 15.0 | 20.0 | 25.0 | 30.0 | 40.0 | 50.0 |
| 2 | Elongation at standard strength, % | 40~80 |
| 3 | CBR Bursting strength, KN≥ | 0.8 | 1.6 | 1.9 | 2.9 | 3.9 | 5.3 | 6.4 | 7.9 | 8.5 |
| 4 | Tear Strength, kN (CD,MD) ≥ | 0.14 | 0.21 | 0.28 | 0.42 | 0.56 | 0.7 | 0.82 | 1.10 | 1.25 |
| 5 | Equivalent opening size O90( O95 ), mm | 0.05~0.2 |
| 6 | Vertical seepage coefficient,cm/s | K×(10-1-10-3)K=1.0~9.9 |
| 7 | Thickness, mm, ≥ | 0.8 | 1.2 | 1.6 | 2.2 | 2.8 | 3.4 | 4.2 | 5.5 | 6.8 |
| 8 | Width deviation % | -0.5 |
| 9 | Unit area weight deviation % | -5 |
Application of Geotextiles in Water Conservancy Projects
Geotextiles play an irreplaceable role in water conservancy projects. Their applications are mainly reflected in core functions such as filtration, drainage, anti-seepage, and reinforcement. Combined with the search results, the specific application scenarios are as follows:
Anti-filtration and drainage system
1. Anti-filtration layer for dams and slope protection
Geotextiles intercept soil particles through three-dimensional pore structures, allowing water to flow through and preventing soil erosion. For example, in dams and slope protection projects, geotextiles as anti-filtration layers can effectively prevent fine particles from being carried away by water flow and maintain structural stability.
2. Drainage pipes and ditches
Geotextiles wrap drainage pipes or gravel drainage ditches to form efficient drainage channels, dissipate soil pore water pressure, and prevent infiltration damage.
Seepage prevention and isolation
1. Composite anti-seepage structure
Geotextiles are often used in combination with geomembranes (such as HDPE membranes) to form a "two-textile and one-membrane" structure, which is used in anti-seepage projects such as artificial lakes and reservoirs. Geotextiles provide a protective layer to prevent the membrane from being pierced by sharp objects.
2. Isolation of different soil layers
In water conservancy projects, geotextiles can isolate sand and gravel from foundation soil to avoid mixing and causing structural failure. For example, in canal anti-seepage projects, geotextiles isolate the sand and gravel filter layer from the clay layer.
Slope protection and reinforcement
1. Dam reinforcement
Geotextiles enhance the stability of dam slopes and prevent landslides through reinforcement. For example, Shandong Hongyue Environmental Protection Technology's polyester filament geotextiles are used in dam anti-seepage reinforcement projects.
2. River and coastal protection
In river regulation and coastal slope protection, geotextiles are combined with concrete interlocking blocks to improve anti-scouring capabilities and protect riverbank structures.
Application in special scenarios
1. Filter layer of water wells and pressure relief wells
Geotextiles are used as filter layers of water wells and pressure relief wells to filter sand and soil particles and ensure smooth water flow.
2. Tailings dams and ash storage dams
In the initial dam surface of tailings dams or ash storage dams, geotextiles are used as filter layers to prevent fine particles from clogging the drainage system.
Construction points and material selection suggestions
1. Construction specifications
· When laying, it needs to be buried in the soil, with a covering thickness of ≥30cm and an overlap width of ≥20cm, and connected by suturing or hot welding.
· The edges are fixed with sandbags or iron wire to avoid displacement.
2. Material selection suggestions
· Polyester filament geotextiles are preferred because of their high strength and corrosion resistance, which are better than staple fiber cloths.
· Composite anti-seepage projects need to detect a water permeability coefficient of ≤10⁻¹¹m/s.
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