Why landfills need geotextiles?

Geotextile is a new type of geosynthetic product, which is a water permeable geosynthetic material made of synthetic fibers through needling or weaving. The material of geotextile is PP and PET, and it can be divided into woven geotextile and non-woven geotextile according to the process. Geotextile has excellent isolation, filtration and water permeability, and can be applied in many fields.

What are the properties of geotextile?
1, geotextile has water permeability, because geotextile is made of plastic fibers, the voids between the fibers can make water flow, and the fibers themselves will not absorb water. Therefore, it has very good water permeability and will not absorb water.

2、Geotextile has good tensile strength, and can maintain good compressive strength and elongation whether in dry or wet conditions.

3, has good chemical resistance, that is, resistant to acid and alkali and other corrosive chemicals. Even in soil and water with different PH values, it can maintain good performance and long service life. For environments with different PH values, PP or PET geotextile should be selected according to the actual application.

4、Geotextile has anti-bacterial and anti-biological properties. As geotextile is a fiber product, it can not be digested by organisms or insects, so it will not be destroyed by microorganisms and insects, and it is not easy to biodegrade.

5, Geotextile is very light weight, there are a variety of weight specifications such as 100~1000, support customization, laying is very convenient.

What role can geotextile play in the application?
The main role of geotextile is isolation, filtration, in addition to geotextile and geomembrane combination can also form a composite anti-puncture interlayer, play a role in strengthening and protecting the substrate. The following is a detailed introduction to the role of geotextile.

1, because the geotextile is composed of filament or staple fibers, the fiber is very dense, can isolate the material of different densities. For example, in landfill engineering and geotechnical engineering, geotextile can isolate different substances such as soil and sand, soil and concrete. Geotextile can replace the role of stone and gravel interlayer. At the same time, compared with other materials, geotextile is also very light and occupies a very small volume.

2、Filtration or anti-filtration. In landfills or construction projects, water can flow through and be collected due to the good air permeability and water permeability of geotextiles. Through the paved blind ditch and edge drain, a drainage system can be established in landfill project, which is beneficial to the drainage and overflow prevention of the whole subgrade. This function is very important for the drainage of rainwater washout and excess liquid in landscape engineering or road reinforcement.

3, protection and enhancement role. Geotechnical engineering sector has a certain tensile strength and deformation capacity, can withstand a certain amount of pressure, and can be dispersed, decomposition of external impact, thus protecting the soil body from the impact of external forces. Especially in landfills and other environmental protection projects, geotextiles and geomembranes form a composite structure that can enhance the tensile strength of the soil body and the stability of the structure, so that the whole system can withstand greater pressure and external impact.

Application of Geotextile
Geotextile is widely used in environmental protection engineering, water conservancy, mining, highway, railroad and other geotechnical engineering because of its excellent characteristics such as drainage and light weight.

1、It can be used as drainage material for reservoirs and mines.

2、Forming drainage layer at the top or bottom of high-rise buildings (usually used in conjunction with other geotechnical products).

3、Used for seepage and scour prevention of dams and embankments (geotextile and geobag are used).

4. Used in highway, railroad, highway and other road projects such as grass-roots paving, which can prevent asphalt pavement from freezing and cracking.

5. Used in environmental protection projects, such as sanitary landfill project. Landfill project, etc. As a leading environmental protection material, it is a very good product to solve the problem of landfill seepage and leakage prevention.

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