In 1926, relevant departments in South Carolina, USA, first used cotton fabrics in highway construction, which was the prototype of modern geotextiles. Later, with the advancement of science and technology and the expansion of applications, the processing technology of geotextiles became increasingly professional and was widely used in many engineering fields around the world, including roads, railways, airports, ports, water conservancy, wind power, environmental protection, and municipal administration. wait.
Road reinforcement
The role of geotextiles in road reinforcement The usage is very large, mainly including road construction on soft soil foundations (including highway and railway construction, etc.). On temporary roads or construction platforms, because the foundation soil is too soft to support initial construction operations, the use of geotextile reinforcement can reduce the thickness of gravel required for construction equipment to enter the site and maintain the stability of the roadbed; in addition, geotextiles are used For road construction, it can reduce the thickness of the roadbed and avoid maintenance problems during long-term use.
In road construction, in addition to reinforcement, geotextiles also It works in synergy with other functions, such as the separation function that separates gravel from the roadbed, and the drainage function that guides water in weak foundations to the aggregate layer.
Maritime Engineering
The main role of geotextiles in maritime engineering It protects land and man-made structures from seawater impact and maintains their structural stability. Currently, there are two main application forms: one is used alone as a material to filter or improve structural stability; the other is used as a filling shell with sand filled inside. etc. used as corrosion-resistant and structural stabilizing materials.
Woven geotextiles are often used in marine engineering as geobags, Used in the form of geotubes and geocontainers. Polypropylene woven geotextile is often used in marine engineering. It has a good filtering effect on sand and can maintain the stability of the shape and structure. Composite geotextiles have excellent abrasion resistance, impact resistance and UV resistance, making them very suitable for long-term use in marine environments.
Soil erosion protection
Geotextiles absorb and store large amounts of water to slow down its erosion and damage to the soil surface, thereby achieving soil erosion protection. In erosion control applications, geotextiles mainly appear in the form of geotechnical erosion control netting, open erosion control blankets, woven geotextiles or geosynthetic liners. Natural fiber geotextiles are mainly used for erosion protection on hillsides around slow-flowing small waterways. They can degrade over time, provide a certain amount of fertility to the soil and promote vegetation growth.
Environmental protection and anti-seepage
In the field of anti-seepage engineering, geotechnical textiles are mainly used in sewage treatment, landfills, tailings treatment, coal fly ash pile plants and other occasions. In these fields, wastes that are piled up for a long time will produce harmful substances such as gas and leachate, causing pollution to soil and groundwater. Therefore, anti-seepage composite geomembranes are mostly used to prevent such phenomena from occurring. Anti-seepage composite geomembrane is generally composed of geotextile and geomembrane, and can be divided into two structures: “one cloth and one membrane” and “two cloths and one membrane”. In addition to good anti-seepage effects, this type of product should also have excellent physical properties such as tensile resistance, tear resistance, and burst resistance.
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