Description

Filament geotextiles:Filament geotextiles are polyester filament needle-punched non-woven geotextiles that do not contain chemical additives or undergo heat treatment, and are environmentally friendly construction materials.
Characteristic
It can replace traditional engineering materials and construction methods, construction is safer and helps environmental protection, and can solve the basic problems in engineering construction more economically, effectively and lastingly.
 
It has good mechanical function, good water permeability, corrosion resistance, aging resistance, isolation, back filtration, drainage, protection, stability, reinforcement and other functions, can adapt to the uneven grass-roots level, can resist construction external force damage, creep is small, long-term load can still maintain the original function.
 
Characteristics of filament geotextile:
 
Strength - The tensile strength in all directions is higher than other needled nonwoven fabrics under the same grammage specification;
 
Ultraviolet light resistance - Highly resistant to ultraviolet light;
 
Extreme high temperature resistance - high temperature resistance up to **0℃, maintaining structural integrity and original physical properties under high temperature;
 
Permeability and planar drainage - geotextile is thick and needle-punched, with good planar drainage and vertical permeability, which can be maintained after many years;
 
Creep resistance - Geotextile is better than other geotextiles in terms of creep resistance and therefore has good longevity. It can resist the erosion of common chemicals in the soil and the corrosion of gasoline and diesel;
 
Ductility - geotextile has good elongation under certain stress, which makes it adaptable to uneven and irregular substrates;
 
Technical characteristics of filament geotextile: The geotextile is thicker, which can ensure the three-dimensional void ratio of geotextile and is conducive to the realization of excellent hydraulics properties. The top breaking strength of geotextile has great advantages, especially suitable for retaining wall and embankment reinforcement. The indicators of geotextiles all exceed national standards and are excellent geotechnical reinforcement materials. Application areas
(1) Reinforcement in the backfill of retaining walls, or for anchoring the panels of retaining walls. Building wrapped retaining walls or bridge abutments.
 
(2)Reinforcing flexible pavement, repairing cracks on the road and preventing reflection cracks on the road.
 
(3) Increase the stability of gravel slopes and reinforced soil to prevent soil erosion and frost damage to the soil at low temperatures.
 
(4) Isolation layer between road ballast and roadbed, or isolation layer between roadbed and soft foundation.
 
(5)Isolation layer between artificial fill, rock pile or material field and foundation, isolation between different permafrost layers, back filtration and reinforcement.
 
(6) The filter layer of the initial upstream face of an ash storage dam or tailings dam, the filter layer of the drainage system in the backfill of a retaining wall.
 
(7) The filter layer around the drainage culvert or around the gravel drainage culvert.
 
(8) The filter layer of water wells, pressure-reducing wells or inclined pressure pipes in water conservancy projects.
 
(9)The isolation layer of geotextile between highway, airport, railroad road slag and artificial rock pile, etc. and foundation.
 
(*0) internal vertical or horizontal drainage of earth dams, buried in the soil to dissipate void water pressure.
 
(*1) Drainage behind impermeable geomembranes in earthen dams or earth embankments or in the lower part of concrete sheathing.
 
(*2) Excluding seepage around the tunnel, reducing the external water pressure on the lining and seepage around each building.
 
(*3)Drainage of sports field foundation on artificial landfill.
 
(*4)Used to strengthen the weak foundation in highway (including temporary road), railroad, embankment, earth and rock dam, airport, sports field and other projects. Functional role
1、Isolation
 
That is, the use of geotextiles with different physical properties (particle size, distribution, consistency and density, etc.) of construction materials (such as soil and sand, sand and gravel, soil and concrete, etc.) for isolation. So that there is no loss and no mixing between two or more materials, to maintain the overall structure and function of the material, so that the load bearing capacity of the structure is enhanced.
 
2、Filtration
 
When water flows from the fine-grained soil layer into the coarse-grained soil layer, the good air permeability and water permeability of the needle-punched geotextile are used to make the water flow through. And it effectively intercepts the soil particles, fine sand, small stones, etc. to keep the stability of soil and water engineering.
 
3、Drainage
 
Geotextile is a good water-conducting material, which can form drainage channels in the soil structure and remove the excess liquid and gas inside the soil structure.
 
4、Strengthening
 
Geotextile is used to enhance the tensile strength and deformation resistance of the soil body and to enhance the stability of the building structure in order to improve the quality of the soil body.
 
5、Protection
 
Effectively diffuse, transfer or decompose the concentrated stress to prevent the soil body from being damaged by external forces.
 
6、Closure
 
Geotextile works with other materials (asphalt, plastic film) to form an impermeable compartment in the soil layer. (Mainly used for highway resurfacing, repair, etc.). Application areas
Hydraulic engineering: sea dike, river dike, lake dike up to standard project; reservoir reinforcement project; polder project; flood control and rescue.
 
Highway, railroad and air port engineering: soft foundation reinforcement treatment; slope protection; pavement anti-reflection crack structure layer; drainage system; greening isolation zone.
 
Electrical engineering: nuclear power station foundation engineering; thermal power ash dam engineering; hydroelectric power station engineering. Main features
Polyester long fiber non-woven geotextile has excellent heat and light resistance properties. Even after short-term exposure in an environment of nearly *0℃, its performance remains almost unchanged. After a lot of tests and practice, polyester long-fiber nonwoven geotextiles have long-term corrosion resistance to various natural soils, moisture and microorganisms. The product is mainly used in the following features:
 
1、Can play a permanent isolation role;
 
Long-term isolation of soil layers composed of different components and properties and to prevent mixing;
 
With frost resistance and construction of the required load-bearing requirements.
 
2, with good back filtration performance and anti-corrosion properties;
 
Water can penetrate in all directions and will not accumulate pressure. At the same time, it can prevent soil loss, which is beneficial to stability and anti-corrosion performance.
 
3、With reliable drainage performance ;
 
Due to the fluffiness of its structure, it can effectively control the drainage of the geotechnical engineering surface.
 
4、Have good protection performance;
 
Because of its good con puncture, extension and fluffiness, can effectively protect the waterproof layer from potential mechanical damage.
 
5、With reinforcing performance;
 
Fluffiness and high strength properties improve the overall stability of the project and increase its strength. Applications
Nonwoven geotextiles are staple-punched geotextiles and spunbond filament geotextiles. Short-fiber needle-punched geotextiles are made of polyester, polypropylene or nylon staple fibers, which are processed through wool, flow, mesh laying, needling and re-needling. It is characterized by high density, fluffy structure, anti-corrosion, aging resistance, acid and alkali resistance, good water absorption and water permeability, high tensile strength, and high resistance to deformation. It is suitable for the prevention and control of road overturning, slope protection, water channel protection layer and other projects, and is more widely used in China. For example, in the beaches of Liaohe oilfield, the soil is mostly soft and flow plastic with high water content, high compressibility and low bearing capacity, and when the pavement starts to be paved in the spring thawing period, the redistribution of soil water changes, leading to serious pavement slurry. In response to this situation, Liaohe Oilfield designed and selected domestic LHw*4 chatter polyester needle punching non-woven geotextile to prevent and control the pavement slurry of frozen soil filling roadbed in spring thawing period. The specific practice is to set a single layer of LHw a **0 geotextile as isolation layer under the slag road surface. Test results show that this geotextile has a significant isolation effect, can effectively prevent the pavement turning mud, and has the role of reinforcement and stress diffusion, greatly improving the stability of the wet soft roadbed. Another example is the dam of Daguangba pivot project with a total length of ***2 meters, including ***2 meters of left bank earth dam and ***9 meters of right bank earth dam, in which the slope protection of the upstream of the earth dam adopts a combination of needle-punching nonwoven fabric and stone holding method. After two years of slope protection construction, it shows that the method has the advantages of resisting wind and wave scouring, reducing wind and wave climbing height and strong ability to adapt to deformation. Another example is the **0 million yuan investment in Shandong drains the yellow to Qing project, the choice of staple non-woven geotextile for the canal surface protection layer, engineering design with more than **0,**0 square meters of cloth, construction method is to lay a layer of plastic film on the surface of the canal, above and then lay geotextile, and then line up a good concrete plate to prevent the canal water with underground leakage, and filament geotextile mainly plays a protective role to prevent the plastic cloth is destroyed by the concrete plate: In addition, staple fiber Needle geotextile is also used in Angou River water fall dam as a drainage facility, applied to the seawall soft foundation treatment, etc., have received better technical and economic results. Future
Foreign application of geotextiles began as early as the ***0s, the United States is the world\'s largest consumption of geotextiles, which in the early ***0s on its annual dosage of more than **0 million m2, the dosage in recent years reached **0 million m2. Europe and Japan\'s geotextiles have also been faster development, the annual dosage of geotextiles in Europe in recent years is also about **0 million m2, spunbond non-woven accounted for *0% of the non-woven geotextiles About; Japan in the mid****0s after the application of geotextiles has a significant growth. Japan\'s non-woven geotextiles to spunbond method in the largest amount, accounting for about *0% of the total non-woven geotextiles, and mainly PET spunbond.
 
China\'s geotextiles started in the early *0s, but the amount was very small at that time, only the experimental application. It was not until the ***8 mega-flood caused the government\'s attention and the construction department included the application of geotextiles in the design specification and formulated the relevant national standards that geotextiles were truly valued and developed. The amount of geotextiles in China has exceeded **0 million m2, and the proportion of non-woven geotextiles in the total amount has reached about *0%. Experts estimate that China\'s geotextiles will still grow by double-digit in the next *5 years, of which the faster growth rate is PET spunbond filament geotextiles.
 
During the "Tenth Five-Year Plan" and the "Eleventh Five-Year Plan", China plans to make huge investments in water conservancy, electric power, transportation, environmental protection, river management and other projects, including water conservancy construction, the South-North Water Transfer Project, electric power investment, highway and railroad construction, environmental engineering construction, as well as ports, airports, garbage disposal, river, lake and sea management, sand control and other projects, with investments amounting to trillions of yuan. China will have more infrastructure projects to be built in the next *0 years or more, and the demand for geotextiles will be more and more, and China will become the largest marketing market for geosynthetics in the world.Filament geotextiles:Filament geotextiles are polyester filament needle-punched non-woven geotextiles that do not contain chemical additives or undergo heat treatment, and are environmentally friendly construction materials.
Characteristic
It can replace traditional engineering materials and construction methods, construction is safer and helps environmental protection, and can solve the basic problems in engineering construction more economically, effectively and lastingly.
 
It has good mechanical function, good water permeability, corrosion resistance, aging resistance, isolation, back filtration, drainage, protection, stability, reinforcement and other functions, can adapt to the uneven grass-roots level, can resist construction external force damage, creep is small, long-term load can still maintain the original function.
 
Characteristics of filament geotextile:
 
Strength - The tensile strength in all directions is higher than other needled nonwoven fabrics under the same grammage specification;
 
Ultraviolet light resistance - Highly resistant to ultraviolet light;
 
Extreme high temperature resistance - high temperature resistance up to **0℃, maintaining structural integrity and original physical properties under high temperature;
 
Permeability and planar drainage - geotextile is thick and needle-punched, with good planar drainage and vertical permeability, which can be maintained after many years;
 
Creep resistance - Geotextile is better than other geotextiles in terms of creep resistance and therefore has good longevity. It can resist the erosion of common chemicals in the soil and the corrosion of gasoline and diesel;
 
Ductility - geotextile has good elongation under certain stress, which makes it adaptable to uneven and irregular substrates;
 
Technical characteristics of filament geotextile: The geotextile is thicker, which can ensure the three-dimensional void ratio of geotextile and is conducive to the realization of excellent hydraulics properties. The top breaking strength of geotextile has great advantages, especially suitable for retaining wall and embankment reinforcement. The indicators of geotextiles all exceed national standards and are excellent geotechnical reinforcement materials. Application areas
(1) Reinforcement in the backfill of retaining walls, or for anchoring the panels of retaining walls. Building wrapped retaining walls or bridge abutments.
 
(2)Reinforcing flexible pavement, repairing cracks on the road and preventing reflection cracks on the road.
 
(3) Increase the stability of gravel slopes and reinforced soil to prevent soil erosion and frost damage to the soil at low temperatures.
 
(4) Isolation layer between road ballast and roadbed, or isolation layer between roadbed and soft foundation.
 
(5)Isolation layer between artificial fill, rock pile or material field and foundation, isolation between different permafrost layers, back filtration and reinforcement.
 
(6) The filter layer of the initial upstream face of an ash storage dam or tailings dam, the filter layer of the drainage system in the backfill of a retaining wall.
 
(7) The filter layer around the drainage culvert or around the gravel drainage culvert.
 
(8) The filter layer of water wells, pressure-reducing wells or inclined pressure pipes in water conservancy projects.
 
(9)The isolation layer of geotextile between highway, airport, railroad road slag and artificial rock pile, etc. and foundation.
 
(*0) internal vertical or horizontal drainage of earth dams, buried in the soil to dissipate void water pressure.
 
(*1) Drainage behind impermeable geomembranes in earthen dams or earth embankments or in the lower part of concrete sheathing.
 
(*2) Excluding seepage around the tunnel, reducing the external water pressure on the lining and seepage around each building.
 
(*3)Drainage of sports field foundation on artificial landfill.
 
(*4)Used to strengthen the weak foundation in highway (including temporary road), railroad, embankment, earth and rock dam, airport, sports field and other projects. Functional role
1、Isolation
 
That is, the use of geotextiles with different physical properties (particle size, distribution, consistency and density, etc.) of construction materials (such as soil and sand, sand and gravel, soil and concrete, etc.) for isolation. So that there is no loss and no mixing between two or more materials, to maintain the overall structure and function of the material, so that the load bearing capacity of the structure is enhanced.
 
2、Filtration
 
When water flows from the fine-grained soil layer into the coarse-grained soil layer, the good air permeability and water permeability of the needle-punched geotextile are used to make the water flow through. And it effectively intercepts the soil particles, fine sand, small stones, etc. to keep the stability of soil and water engineering.
 
3、Drainage
 
Geotextile is a good water-conducting material, which can form drainage channels in the soil structure and remove the excess liquid and gas inside the soil structure.
 
4、Strengthening
 
Geotextile is used to enhance the tensile strength and deformation resistance of the soil body and to enhance the stability of the building structure in order to improve the quality of the soil body.
 
5、Protection
 
Effectively diffuse, transfer or decompose the concentrated stress to prevent the soil body from being damaged by external forces.
 
6、Closure
 
Geotextile works with other materials (asphalt, plastic film) to form an impermeable compartment in the soil layer. (Mainly used for highway resurfacing, repair, etc.). Application areas
Hydraulic engineering: sea dike, river dike, lake dike up to standard project; reservoir reinforcement project; polder project; flood control and rescue.
 
Highway, railroad and air port engineering: soft foundation reinforcement treatment; slope protection; pavement anti-reflection crack structure layer; drainage system; greening isolation zone.
 
Electrical engineering: nuclear power station foundation engineering; thermal power ash dam engineering; hydroelectric power station engineering. Main features
Polyester long fiber non-woven geotextile has excellent heat and light resistance properties. Even after short-term exposure in an environment of nearly *0℃, its performance remains almost unchanged. After a lot of tests and practice, polyester long-fiber nonwoven geotextiles have long-term corrosion resistance to various natural soils, moisture and microorganisms. The product is mainly used in the following features:
 
1、Can play a permanent isolation role;
 
Long-term isolation of soil layers composed of different components and properties and to prevent mixing;
 
With frost resistance and construction of the required load-bearing requirements.
 
2, with good back filtration performance and anti-corrosion properties;
 
Water can penetrate in all directions and will not accumulate pressure. At the same time, it can prevent soil loss, which is beneficial to stability and anti-corrosion performance.
 
3、With reliable drainage performance ;
 
Due to the fluffiness of its structure, it can effectively control the drainage of the geotechnical engineering surface.
 
4、Have good protection performance;
 
Because of its good con puncture, extension and fluffiness, can effectively protect the waterproof layer from potential mechanical damage.
 
5、With reinforcing performance;
 
Fluffiness and high strength properties improve the overall stability of the project and increase its strength. Applications
Nonwoven geotextiles are staple-punched geotextiles and spunbond filament geotextiles. Short-fiber needle-punched geotextiles are made of polyester, polypropylene or nylon staple fibers, which are processed through wool, flow, mesh laying, needling and re-needling. It is characterized by high density, fluffy structure, anti-corrosion, aging resistance, acid and alkali resistance, good water absorption and water permeability, high tensile strength, and high resistance to deformation. It is suitable for the prevention and control of road overturning, slope protection, water channel protection layer and other projects, and is more widely used in China. For example, in the beaches of Liaohe oilfield, the soil is mostly soft and flow plastic with high water content, high compressibility and low bearing capacity, and when the pavement starts to be paved in the spring thawing period, the redistribution of soil water changes, leading to serious pavement slurry. In response to this situation, Liaohe Oilfield designed and selected domestic LHw*4 chatter polyester needle punching non-woven geotextile to prevent and control the pavement slurry of frozen soil filling roadbed in spring thawing period. The specific practice is to set a single layer of LHw a **0 geotextile as isolation layer under the slag road surface. Test results show that this geotextile has a significant isolation effect, can effectively prevent the pavement turning mud, and has the role of reinforcement and stress diffusion, greatly improving the stability of the wet soft roadbed. Another example is the dam of Daguangba pivot project with a total length of ***2 meters, including ***2 meters of left bank earth dam and ***9 meters of right bank earth dam, in which the slope protection of the upstream of the earth dam adopts a combination of needle-punching nonwoven fabric and stone holding method. After two years of slope protection construction, it shows that the method has the advantages of resisting wind and wave scouring, reducing wind and wave climbing height and strong ability to adapt to deformation. Another example is the **0 million yuan investment in Shandong drains the yellow to Qing project, the choice of staple non-woven geotextile for the canal surface protection layer, engineering design with more than **0,**0 square meters of cloth, construction method is to lay a layer of plastic film on the surface of the canal, above and then lay geotextile, and then line up a good concrete plate to prevent the canal water with underground leakage, and filament geotextile mainly plays a protective role to prevent the plastic cloth is destroyed by the concrete plate: In addition, staple fiber Needle geotextile is also used in Angou River water fall dam as a drainage facility, applied to the seawall soft foundation treatment, etc., have received better technical and economic results. Future
Foreign application of geotextiles began as early as the ***0s, the United States is the world\'s largest consumption of geotextiles, which in the early ***0s on its annual dosage of more than **0 million m2, the dosage in recent years reached **0 million m2. Europe and Japan\'s geotextiles have also been faster development, the annual dosage of geotextiles in Europe in recent years is also about **0 million m2, spunbond non-woven accounted for *0% of the non-woven geotextiles About; Japan in the mid****0s after the application of geotextiles has a significant growth. Japan\'s non-woven geotextiles to spunbond method in the largest amount, accounting for about *0% of the total non-woven geotextiles, and mainly PET spunbond.
 
China\'s geotextiles started in the early *0s, but the amount was very small at that time, only the experimental application. It was not until the ***8 mega-flood caused the government\'s attention and the construction department included the application of geotextiles in the design specification and formulated the relevant national standards that geotextiles were truly valued and developed. The amount of geotextiles in China has exceeded **0 million m2, and the proportion of non-woven geotextiles in the total amount has reached about *0%. Experts estimate that China\'s geotextiles will still grow by double-digit in the next *5 years, of which the faster growth rate is PET spunbond filament geotextiles.
 
During the "Tenth Five-Year Plan" and the "Eleventh Five-Year Plan", China plans to make huge investments in water conservancy, electric power, transportation, environmental protection, river management and other projects, including water conservancy construction, the South-North Water Transfer Project, electric power investment, highway and railroad construction, environmental engineering construction, as well as ports, airports, garbage disposal, river, lake and sea management, sand control and other projects, with investments amounting to trillions of yuan. China will have more infrastructure projects to be built in the next *0 years or more, and the demand for geotextiles will be more and more, and China will become the largest marketing market for geosynthetics in the world.