Geotextile, also called Geo Fabricis, a water-permeable geosynthetic material made of synthetic fibers through needle punching or weaving. Geotextile is one of the new geosynthetics. The finished product is in the shape of cloth. Geo Fabric is divided into woven geotextile and non-woven filament geotextile. Geo fabric for driveway can play the role of isolation, filtration, drainage, reinforcement, protection, and puncture prevention.
When choosing the type of Geo Fabric for highway maintenance, it is necessary to consider the specific needs of the project, environmental conditions and the performance characteristics of the geotextile. The following is a detailed analysis and suggestions for choosing the type of BPM geotextile:
1. Clarify The Project Requirements
Geotextile is a geosynthetic material made of synthetic fibers through needle punching or weaving process, which has the characteristics of water permeability, filtration, isolation and reinforcement. It is widely used in construction, transportation, water conservancy projects and other fields, mainly used to solve soil and water management problems.
First, it is necessary to clarify the specific requirements of highway maintenance projects, including protection targets, service life, load bearing and other factors. For example, in projects such as slope erosion protection and roadbed stabilization, it is necessary to select geotextiles with better protection performance and durability.
2. Understand The Performance Of Geo Fabric
The performance characteristics of Geo Fabric mainly include tensile strength, elongation, corrosion resistance, water permeability, etc. Different types of geotextiles have differences in these properties, so it is necessary to select the appropriate model according to the project requirements.
2.1 Geo Fabric For Driveway – Tensile strength:
The tensile strength of geotextiles is an important indicator to measure its ability to resist tensile damage. When selecting, geotextiles with appropriate tensile strength should be selected according to the actual situation of the project to ensure that they will not break or break during use.
2.2 Geo Fabric For Driveway – Elongation:
The elongation reflects the flexibility and deformation ability of geotextiles. In projects that need to adapt to foundation deformation or bear a certain load, geotextiles with a larger elongation should be selected.
2.3 Geo Fabric For Driveway – Corrosion resistance:
Since highway maintenance projects are mostly in outdoor environments, geotextiles need to have good corrosion resistance to resist erosion by chemicals such as acids, alkalis, and salts.
2.4 Geo Fabric For Driveway – Water permeability:
The water permeability of geotextiles plays an important role in maintaining soil moisture and promoting plant growth. When selecting, geotextiles with appropriate water permeability should be selected according to project requirements.
3. Geo Fabric For Driveway – Choose The Right Specifications
According to the project requirements and the performance characteristics of the geotextile, you can choose the following common highway maintenance geotextile models:
- 100g/m² to 200g/m² geotextile: suitable for general road moisture maintenance and protection projects, with good protection and water permeability.
- 200g/m² to 300g/m² geotextile: suitable for harsh environments and projects that require higher protection performance, such as slope protection of highways, railways and other transportation projects.
- Filament geotextile: has high tensile strength and wear resistance, suitable for projects that need to enhance the tensile strength and wear resistance of the road surface.
- Short-filament geotextile: usually used to keep the road surface moist and prevent road cracking.
- Composite geotextile: It is composed of long-filament or short-filament geotextile and plastic or metal mesh, which has the functions of enhancing the tensile strength and wear resistance of the road surface and preventing the road surface from cracking.
4. Geo Fabric For Driveway – Geo Fabriclaying Method:
4.1 Manual rolling
Use manual rolling to spread the fabric, the surface should be flat, and leave an appropriate deformation margin.
4.2 Overlapping, sewing and welding methods
The installation of long-filament or short-filament geotextiles usually uses overlapping, sewing and welding methods. The width of sewing and welding is generally more than 0.1m, and the overlap width is generally more than 0.2m. Geotextiles that may be exposed for a long time should be welded or sewn.
4.3 Geotextile sewing
- All stitching must be continuous (for example, point stitching is not allowed). Before overlapping, the geotextile must overlap by at least 150mm. The minimum stitch distance from the selvedge (the exposed edge of the material) is at least 25mm.
- The sewn geotextile seam includes at least 1 row of wired lock chain stitching. The thread used for sewing should be a resin material with a minimum tension of more than 60N and have chemical corrosion and UV resistance equivalent to or exceeding that of the geotextile.
- Any “missed stitches” on the sewn geotextile must be re-sewn at the affected area.
- Appropriate measures must be taken to prevent soil, granular matter or foreign matter from entering the geotextile layer after installation.
- The overlap of the fabric can be divided into natural overlap, stitching or welding according to the terrain and use function.
4.4 Natural lap seam or hot air welding
During construction, the geotextile on the geomembrane is naturally overlapped, and the geotextile on the upper layer of the geomembrane is stitched or hot air welded. Hot air welding is the preferred connection method for filament geotextiles, that is, the connection of the two pieces of fabric is instantly heated at high temperature with a hot air gun to make it partially melted, and immediately use a certain external force to firmly bond them together. In humid (rainy and snowy) weather, when hot bonding cannot be performed, the geotextile should adopt another method-sewing connection method, that is, double-line sewing connection with a special sewing machine, and chemical UV-resistant sutures.
4.5 Chemical damage and UV exposure
For seams, the same quality as the geotextile should be used, and the suture should be made of a material with stronger resistance to chemical damage and UV exposure.
4.6 Supervision Approval
After the geotextile is laid and approved by the on-site supervision engineer, the geomembrane is laid.
The geotextile on the geomembrane is laid in the same way as above after the geomembrane is approved by Party A and the supervisor.
Basic requirements for laying geotextiles:
- The joint must intersect with the slope line; where it is balanced with the slope foot or where stress may exist, the distance of the horizontal joint must be greater than 1.5m.
- On the slope, anchor one end of the geotextile, and then lower the roll to the slope to ensure that the geotextile remains taut.
- All geotextiles must be pressed down with sandbags, which will be used during laying and retained until the upper layer of material is laid.
5. Summary
When selecting a Geo Fabric model, the specific needs and environmental conditions of the project should be fully considered. This ensures that the selected model meets project requirements. When purchasing Geo Fabric, choose products from regular manufacturers. Check relevant documents such as product quality certificates and inspection reports to ensure product reliability. The Best Project Material Co., Ltd focuses on geotextile production and offers one-stop services. They are a very reliable choice. During construction, follow relevant specifications and standards strictly. Ensure correct laying and fixing of the geotextile to maximize its protective and reinforcement functions.
