Combination of geotextile and geogrid
- Time of issue:2020-06-17
Combination of geotextile and geogrid
- Time of issue:2020-06-17
At any time, the application field of geotextile is increasing, and the composite geogrid is also born. The so-called composite geogrid is the combination of geotextile and geogrid, which is used by the combination of geotextile and geogrid. In order to explain the composite geogrid to you today, we will respectively explain the geotextile and geogrid, and understand the significance of the composite geogrid after we understand the two products Yes.
The main component of the composite geogrid is short fiber, which is the raw material with width of 110cm and weight. Other components and content are mainly used. The spinning color is white in the way of 90 mesh forming,
1: The construction materials (such as soil and sand, soil and concrete) with different physical properties (particle size, distribution, consistency and density) are isolated by using polyester staple fiber needle punched geotextile. Make two or more materials not lose or mix, maintain the overall structure and function of materials, and strengthen the bearing capacity of structures.
2: Filtration (reverse filtration) when the water flows from the fine soil layer to the coarse soil layer, the polyester short fiber needle punched geotextile has good permeability and water permeability, and the polyester geogrid manufacturer makes the water flow through, and effectively intercepts the soil particles, fine sand, small stone, etc., so as to maintain the stability of the water and soil engineering.
3: The drainage polyester staple fiber needled geotextile has good water conducting performance, which can form drainage channels inside the soil and discharge the excess liquid and gas in the soil structure.
4: The reinforcement uses polyester staple fiber needle punched geotextile to enhance the tensile strength and deformation resistance of the soil, enhance the stability of the building structure, and improve the quality of the soil.
5: When protecting the soil from water erosion, the steel plastic geogrid manufacturer effectively diffuses, transmits or decomposes the concentrated stress, prevents the soil from being damaged by external force, and protects the soil.
6: The combination of anti puncture and geomembrane becomes a composite waterproof and anti-seepage material, which plays the role of anti puncture. High tensile strength, good permeability, air permeability, high temperature resistance, freezing resistance, aging resistance, corrosion resistance, non moth. With advanced technology, it is a group company with good quality in China and complete varieties of geosynthetics integrating R & D, production, marketing and service. Some designers don't know enough about the importance of waterproof. They think that the underground water leakage does not affect the safety of the structure, and they don't pay enough attention to the selection of materials and design methods. Therefore, the careful study of the waterproof design scheme combined with the structural characteristics is not sufficient, resulting in the unreasonable waterproof design. Composite geomembrane product structure is one cloth, one membrane, two cloth, one membrane, two membranes, one cloth, and other membrane materials (polymer synthetic materials): high density polyethylene (HDPE), low pressure polyethylene (LDPE), chlorinated polyethylene (CPE), EVA (ethylene copolymer), PVC and so on 3, good anti-aging performance caused by waterproof design concept problems: at present, the underground engineering life is in 100 years or more. The service life of waterproof materials can not meet this requirement, so the maintainability and easy replacement of drainage system should be considered in the waterproof design of underground engineering. Waterproof board is a kind of anti-seepage material made of high molecular polymer. It can not only prevent liquid leakage, but also prevent gas volatilization. It is mainly used in the anti-seepage of earth rock dam, rockfill dam, masonry dam, concrete dam, tailing dam, sewage reservoir dam, channel, liquid storage tank and other projects, the anti-seepage lining of subway, basement and tunnel, and the anti-seepage of highway and railway foundation, In the sanitary waste landfill, it is used with geotextile, bentonite waterproof blanket and other geotechnical materials, etc.
Geogrid is particularly important for slope protection construction: it is particularly important to use geogrid as a new geotechnical material for slope protection construction, which has a good effect on strengthening the stability of slope construction and reducing hydraulic erosion. However, the traditional construction method, because of the weathering of concrete, the corrosion of steel bars, and the gradual reduction of the strength of slope protection, the protection effect will become weaker and weaker with the extension of time, so the maintenance cost in the later stage of the project is also very high. In addition, traditional construction measures will lead to a series of ecological environment and engineering problems such as vegetation damage, soil erosion, landslide, slope instability, etc. However, the effect of using geogrid to protect slope is contrary to the traditional method. Using geogrid to protect slope can not only reduce soil erosion, but also improve the original ecological environment. The reason lies in that the geocell slope protection is a new type of slope protection combined with grass planting. On the one hand, under the joint action of friction force between the geogrid side wall and the soil and the lateral binding force of geocell on the soil, the geocell changes the flow direction of the slope water, prolongs the flow path, and makes part of the flow kinetic energy consumed on the cell. The runoff and velocity Both of them can be reduced, which plays a good role in energy dissipation and reduces the erosion of water flow on the slope; on the other hand, they can beautify the environment, which is conducive to the restoration of the slope ecological environment. Geogrid material itself has high strength and other mechanical properties, and has good corrosion resistance and anti-aging properties, and has good toughness and erosion resistance. At the same time, geocell can resist temperature difference caused by temperature changes. Because of the structural characteristics of the geocell itself, it can slow down the flow velocity, reduce the flow energy and disperse the flow, so as to reduce the erosion effect of the flow on the slope soil, and the geocell has a good adhesion effect on the soil.
Use of geogrid products for slope protection. Advantages of galvanized geogrid cage: (1) economy. Just put the stone into the cage and seal it. (2) The construction is simple and does not need special technology. (3) It has a strong ability to resist natural damage, corrosion and adverse weather. (4) It can withstand large-scale deformation without collapse. (5) The silt between the gaps of cage stones is conducive to plant production and can be integrated with the surrounding natural environment. (6) It has good permeability and can prevent damage caused by hydrostatics. (7) Save transportation costs. It can be folded up for transportation and assembled on the construction site. In the case of low carbon, high zinc or 10 aluminum zinc alloy steel wire coated with a layer of PVC or PE (other polymers can not be used), its finished product structure will be more rustproof, antistatic, anti-aging, corrosion resistant, high pressure resistance, high shear resistance and so on, and it can effectively resist the erosion of seawater or highly polluted environment. The river is in a zigzag channel, because when encountering gabion cage or gabion mat, the river will turn around and flow along the inherent channel to guide the river safely. The gabion net is also applied to the flood discharge dam and diversion dam to guide or restrain the flood.
Construction scheme of Expressway filament woven geotextile: lapping of geotextile: when the geotextile is laid, spray the second asphalt tack coat oil and cool for about 2 hours, timely spray appropriate amount of fine yellow sand to prevent the vehicle passing the geotextile from lifting or damaging the cloth due to the wheel tack oil, and the amount of fine sand is about 1-2kg / m2. The geotextile shall be overlapped laterally for about 4-5cm. According to the paving direction, the back end shall be pressed under the front end, cemented with hot asphalt or emulsified asphalt, and fixed with a fixer. The longitudinal lap joint is also about 4-5cm, which can be directly bonded with dry oil. If the lap joint is too wide, the interlayer at the lap joint will become thick, and the binding force between the surface layer and the base course will be weakened, which will easily lead to adverse effects such as bulge, separation and displacement of the surface layer. Therefore, the part with too wide overlap should be cut off. The geotextile shall be laid in a straight line as far as possible. When it is necessary to turn, cut the bending part of the fabric, lay it on top of each other and spray the adhesive layer with oil.
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