What Are Geosynthetics?

Geosynthetics are the general term for synthetic materials used in civil engineering. As a civil engineering material, it uses artificially synthesized polymers (such as plastic, chemical fiber, synthetic rubber, etc.) as raw materials to make various types of products, which are placed inside, on the surface, or between various soils To play the role of strengthening or protecting soil.

Geosynthetics are used in geotechnical and civil engineering construction to

Geomembrane can be generally divided into

1. Density: Density depends on the material from which it is made. Even if the polymers used to make the geomembrane belong to the same class, there are often significant differences. For example, the polyethylene material can be divided into different categories such as ultra-low density, low density, medium density, and high density, and the density of the PE geomembrane produced therefrom is also different. The density of geomembrane polymer is about 0.85mg / L ~ 1.50mg / L. The density commonly used in engineering is generally above 0.94mg / L.

2. Thickness: The thickness refers to the distance from the top to the bottom of the film under the normal pressure of 20kPa. For smooth geomembrane (no embossing or pattern on the surface), the thickness measurement method is similar to the test method for the thickness of the geotextile, but it should be measured with a more accurate dial indicator. Each specimen should be measured at least three different positions, and the average value is used as the thickness of the PE composite geomembrane ^[2]

1 geomembrane bag

Geomembrane bag is a continuous (or separate) bag-like material made of double-layer polymerized chemical fiber fabric.

Geotextile, geomembrane, geogrid, and some special geosynthetics, combining two or more of these materials to form a geocomposite. Geocomposite materials can combine the properties of different materials to better meet the needs of specific projects and can play a variety of functions. For example, a composite geomembrane is a geotextile composition made of a geomembrane and a geotextile according to certain requirements.

Among them, the geomembrane is mainly used to prevent seepage, and the geotextile plays the role of reinforcement, drainage and increasing the friction between the geomembrane and the soil surface. Another example is a geo-composite drainage material. It is a drainage material consisting of a non-woven geotextile and a geonet, a geomembrane, or a geosynthetic material core material of different shapes. pipeline,

Geosynthetics. Different products have different characteristics and can be used in many engineering fields.

The fields that have been applied include geotechnical engineering, civil engineering, hydraulic engineering, environmental engineering, transportation engineering, municipal engineering and sea-building projects.

Protection:

Soil erosion is a natural process caused by the action of water and wind. It has many influencing factors, such as soil, vegetation, and landforms. Under certain conditions, human life activities will also accelerate this process. If this erosion is not treated properly, it may cause huge damage to existing buildings and the environment.

In terms of soil erosion control, geosynthetics can be applied in areas including slope protection, water channel protection, coastline protection, tidal flat reclamation, vegetation restoration, falling rock protection nets, and flood dam construction. Depending on the characteristics of the project and site conditions, one or more geosynthetic products may be involved in erosion control projects.

In slope protection engineering, in addition to using some geosynthetics, it is necessary to use soil nails or even rock anchors to ensure the stability of the protection system. In some cases, heavy-filled geotextile bags are also used to fix the surface, and grass seeds are inserted in the gaps of the protective structure to cultivate vegetation to prevent soil and water loss ^[2] .