What do the geotechnical materials include?
Geotechnical materials include many types, which can be mainly divided into the following categories:
1 Geotextile: This is a kind of polymer as the main raw material, through different woven, weaving or nonwoven processes processed into the material. It has the functions of drainage, filtration, isolation, strengthening and protection.
2 geomembrane: this kind of material is usually made of polymers such as polyethylene (PE), polyester (PET), etc., used in the soil inside, surface or between different soil, to play a strengthening or protective role.
3 Geogrid: This is a structured geotechnical material, common in fiberglass geogrid, etc., used to provide additional reinforcement and support.
4 Drainage board: This kind of material is used in drainage system to help the water flow smoothly from the soil.
5 composite geomembrane: This is a geomembrane combining a variety of materials, with better performance and durability.
6 Geotechnical network: This is a flat network of geosynthetic material, formed by extrusion or hot bonding, used to strengthen and protect the soil.
7 Geotechnical chamber: This is a structured material used to reinforce and protect the edges of the soil.
Bentonite waterproof blanket: this is a kind of waterproof product using bentonite as the main material, suitable for the need for high waterproof performance occasions.
8 Other special materials: such as polystyrene foam plastic, these materials usually have specific functions, such as heat insulation, sound insulation, etc.
These materials are widely used in civil engineering to strengthen, protect and improve the properties of the soil.
What are the specific types and application scenarios of geotextile?
Geotextile is a thin sheet material made from synthetic fiber or yarn, widely used in a variety of engineering fields. We can summarize the specific types and application scenarios of geotextile cloth as follows:
1 Short fiber needle nonwoven geotextile: this kind of geotextile is mainly used in river dam engineering, as anti-erosion materials for slope protection, as well as reinforcing materials for railway, highway and airport runway subgrade.
2 Machine woven geotextile: this kind of geotextile has the advantages of high strength, mainly used for the renovation of highway and railway disease areas, the improvement of soft soil areas, and the reinforcement and erosion prevention of river banks, DAMS, harbors and other places.
3 Other functional geotextiles: such as separation, filtration, drainage, stability, barrier, and corrosion protection, these functions enable geotextiles to be widely used in geotechnical engineering, such as soft soil foundation reinforcement, slope protection, and drainage system.
4. Special Application fields: Geotextile is also used as soil separation and filtration material for reservoirs, mineral processing treatment and drainage, and underground drainage of high-rise houses.
How is the performance of geomembrane under different environmental conditions?
The performance of geomembrane in different environmental conditions has certain adaptability and stability. We can summarize the following points:
1 High permeability coefficient and temperature resistance: the geomembrane has high permeability coefficient (110-17 cm/s), good heat resistance and cold resistance, and the working environment temperature can reach 110 C to-70 C.
2 Chemical stability: geomembrane has excellent chemical stability, can resist the corrosion of strong acid, strong alkali, oil and tar and other chemical media.
3 Tensile strength and ductility: the geomembrane has high tensile strength and significant ductility, which enables it to withstand large tensile force and strain, and adapt to a variety of harsh geological and climatic conditions.
4. Special Application fields: Geotextile is also used as soil separation and filtration material for reservoirs, mineral processing treatment and drainage, and underground drainage of high-rise houses.
