Road maintenance geotextile laying process
1. Storage, transportation and handling of geotextiles
Geotextile rolls should be protected from damage before installation. The geotextile rolls should be piled up in a place where there is no water accumulation, the height of the pile should not exceed four rolls, and the identification piece of the roll can be seen. Geotextile rolls must be covered with opaque materials to prevent UV aging. During the storage process, the integrity of the label and the integrity of the data should be maintained.
Geotextiles must be protected from damage during transportation, including on-site transportation from material storage to work.
Geotextiles that are physically damaged must be repaired. Geotextiles that are severely worn cannot be used. Any geotextile that comes into contact with leaking chemical reagents is not allowed to be used in this project.
2. The laying method of geotextile:
Roll it by hand; the cloth surface should be flat and the deformation allowance should be left as appropriate.
The installation of filament or short geotextiles is usually done by lap joints, stitching and welding. The width of the stitching and welding is generally above, and the overlap width is generally above. Geotextiles that may be exposed for a long time should be welded or stitched.
Sewing of geotextile
All stitching must be done continuously (for example, stitching is not allowed). Geotextiles must overlap a minimum of 150 mm before overlapping. The minimum stitch distance is at least 25 mm from the selvedge (the exposed edge of the material).
The seams of the well-stitched geotextiles include the one-line and the chain-locking chain stitching method. The thread used for stitching shall be a resin material with a minimum tension of more than 60 N and a chemical resistance and UV resistance equivalent to or exceeding that of a geotextile.
Any “leakage needle” on the sewed geotextile must be re-sewed in the affected area.
Corresponding measures must be taken to prevent soil, particulate matter or foreign matter from entering the geotextile after installation.
Geotextile lap joints can be divided into natural lap joints, seams or welds depending on the terrain and function.
Difference between anti-seepage geotextile and seepage geotextile
When the water flows from the fine soil layer to the coarse soil layer, the geotextile with good gas permeability and water permeability is needled with polyester staple fiber to pass the water, effectively carrying soil particles, fine sand and pebbles, and maintaining the geolayer and water. Engineering stability.
The primary anti-seepage geotextile is a kind of polymer chemical flexible material, which has the characteristics of small proportion, high elongation, strong habit of deformation, corrosion resistance, low temperature resistance and good frost resistance.
The primary mechanism is that the leakage channel of the earth-rock dam is cut by the impermeability of the plastic film. The plastic film receives water pressure, and with the increase of tensile strength and elongation, it can be used to the deformation of the dam; it is also a polymer. Short fiber chemistry, which achieves higher tensile strength and elongation by needle punching or heat sealing, not only increases the plastic content after compounding.
Because the surface of the nonwoven geotextile is rough, the tensile strength and puncture resistance of the data film increase the friction coefficient of the touch surface, which is beneficial to the stability of the composite geomembrane and the protective layer. Together with outstanding resistance to bacterial corrosion and chemistry, not afraid of acid, alkali, salt corrosion.
Function: high breaking strength, up to 20KN/m, anti-creep and corrosion resistance. It can be used in water conservancy, dam, highway construction, airport, construction, environmental protection and other projects, and can play the role of filtration, drainage, isolation, protection and reinforcement.
Jinhaocheng Non-woven Fabric Factory is a professional manufacturer of geotextile non-woven fabrics from China. Welcome to consult!
Post time: Jul-14-2019