Geotextile and Geomembrane for Landfill Project in Chile

The landfill project includes a centralized waste storage site under the sanitary landfill method. The sanitary landfill is widely used in the world because of its low cost and good hygiene. The landfill generally adopts the method of layered landfill to deal with the garbage. A layer of garbage is piled up and then covered with a layer of loess, which can easily reduce the pollution of the garbage. Landfill construction includes procedures for site selection, design and construction, landfill waste entry conditions, operation, closure, post-maintenance and management, and pollutant control and monitoring.

We received information from a client in Chile who wanted to build a landfill using a cost-effective and environmentally safe construction method. At the same time, beautify the surface, The geosynthetic materials can provide soil for vegetation to grow, and promote the reuse of landfill land. According to the customer’s request, we recommended the HDPE geomembrane and filament polyester geotextile produced by our company to the customer, and we showed the customer some of our previous construction cases of landfills in different countries.

In this regard, our BPM engineer recommended that customers chose filament polyester geotextile with a weight of 500g/m2 and HDPE geomembrane with a thickness of 1.0mm, which could strengthen the soil by increasing the tensile strength. In the early stage, after receiving the customer’s information, we mailed samples of 2 square meters of filament polyester geotextile and geomembrane to the customer for free. After receiving the sample, the customer sent it to the local testing agency in Chile for some professional testing, testing agency affirmed the quality of our products. In confirming the construction area with the customer, as well as some construction details and so on. And after waiting for the customer’s payment, we immediately produced 50,000 square meters of filament polyester geotextile and geomembrane of the same area. HDPE geomembrane has excellent anti-seepage and isolation functions, while filament polyester geotextile plays the role of protecting HDPE geomembrane and the secondary anti-seepage function of the main body of the system, and filament polyester geotextile has good reverse filtration water permeation function, which can effectively isolate the waste in the lower layer. The filament polyester geotextile isolates the landfill garbage above it to prevent it from directly contacting the soil and groundwater, and at the same time the generated leachate is kept on the upper layer of the HDPE geomembrane and will not pollute the groundwater. Because these two products are easy to transport, simple to construct and low cost, they play an irreplaceable key role in landfill engineering.

Application range of filament geotextiles

1. Increase the stability of gravel slope and reinforced soil to prevent soil erosion and freezing damage of soil at low temperature
2. Isolation layer between artificial soil filling, rockfill or material field and foundation, isolation between different frozen soil layers, back filtration and reinforcement
3. The filter layer around the drainage underdrain or around the gravel drainage underdrain
4. Vertical or horizontal drainage inside the earth dam, buried in the soil to dissipate pore water pressure
5. Roads (including temporary roads), railways, embankments, airports and other projects to strengthen weak foundations

The laying process of geotextiles

1. Any mechanical equipment used for laying geotextiles cannot be used directly on the already laid geotextiles.
2. Do not spread too many geotextile rolls every day so as to exceed the reasonable sewing range.
3. All exposed geotextile edges must be immediately pressed with sandbags or other approved heavy objects to prevent the geotextiles from being blown up by the wind and pulled out of the surrounding anchoring ditch. The geotextile may be blown up by the wind in strong wind conditions, and the laying of the geotextile should be prohibited at this time.
4. When laying geotextiles on the slope, use the control method to anchor the geotextiles, and then lay them down. Uncontrolled unwinding methods such as “arbitrary descent” are not allowed. The method of laying must ensure that the geotextile and any other underlying geotextiles are not damaged.
5. Use a hook knife specially designed for cutting geotextiles to cut geotextiles. The surrounding and underlying geotextile must be protected from damage during the cutting of the geotextile.
6. The laying method of the geotextile must ensure that the geotextile or the underlying geotextile will not be folded or wrinkled. Anything that might cause other geomaterials to wrinkle, fold, or arch should be reapplied or cut and repaired to eliminate these problems.
7. The installer must try to protect the laid geotextile to avoid possible damage caused by the construction machinery.
8. The quality assurance engineer must inspect the laid geotextiles for foreign matter under the geotextiles, worn geotextile materials or improper seams. Any foreign material must be cleaned up. Any worn material and bad seams must be repaired.