White PET Nonwoven Geotextile For Road Highway Railway Slope Tunnel Construction

Constructional Material Filament PET Nonwoven Geotextile for Road Highway Railway Slope Tunnel Construction

1.Geotextile, also known as geotextile, is a permeable geosynthetics made of synthetic fibers through acupuncture or weaving. Geotextile is one of the new materials geosynthetics materials, the finished product is cloth, the general width of 1-6 meters, the length of 50-100 meters. Geotextile is divided into spun geotextile and non-woven filament geotextile

2.Needle non-woven geotextile, specifications 150g / m2-800g / m2 between any choice, the main raw material is using polyester staple fiber or polypropylene staple fiber, through acupuncture system, the main use is: river, sea, lake embankment slope protection, sea reclamation, wharf, lock flood control and emergency engineering, is through the filter to soil and water conservation and prevent piping.

3. Needle non-woven fabric and PE membrane composite geotextile, specifications have a cloth a membrane, two cloth a membrane, the maximum width of 8 meters the main raw materials is to use polyester staple fiber needle non-woven cloth, PE membrane through composite, the main use is seepage prevention, suitable for railway, highway, tunnel, subway, airport and other projects.

The role of geotextiles in dam construction

Geotextiles play a multi-dimensional key role in dam construction, and their core functions can be summarized into the following five points:

1. Anti-filtration effect

The three-dimensional pore structure of geotextile allows water to penetrate freely while blocking the loss of sand and soil particles, preventing the internal structure of the dam from being eroded and damaged. For example, in the dam slope protection or dam body filter layer, geotextile can effectively intercept fine soil particles and maintain soil stability.

2. Drainage function

The high water permeability of geotextile makes it an efficient drainage channel. Installing geotextile inside or around the dam can quickly drain seepage water, reduce pore water pressure, and avoid the risk of landslide or subsidence caused by water accumulation.

3. Isolation effect

Geotextiles are laid between different material layers of the dam (such as soil and concrete, sand and clay) to prevent particle mixing or interlayer sliding, ensuring that each structural layer functions independently. For example, geotextiles can isolate the roadbed from the soft foundation and maintain the stability of the interface.

4. Protective performance

Geotextiles can resist water erosion, ultraviolet aging and chemical corrosion, extending the service life of the dam. Its surface roughness can enhance the friction with concrete or soil, preventing external force puncture or surface erosion.

5. Structural reinforcement

The overall tensile strength of the dam is improved through reinforcement. For example, laying geotextiles on the dam slope or backfill soil can disperse stress, improve lateral support capacity, and prevent cracking or collapse caused by soil displacement.

Application example: In the mechanical siltation and consolidation project in the lower reaches of the Yellow River, geotextile long tube bag technology was used in the construction of the grid embankment, which effectively solved the problems of difficult soil extraction and easy leakage in traditional construction methods. During the specific construction, it is necessary to pay attention to the burial depth ≥30cm, the overlap width ≥20cm, and use suture or hot welding to ensure sealing.

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