Application of Filter Fabric in Infiltration Systems

It's not uncommon to observe the use of geotextile or materials used in an underground detention or intrusion system. It is standard across civil plans worldwide; however, how was a particular geotextile used for the specific underground system that the design has been designed so perfectly? The answer begins with a step back to understand why we employ filter fabrics.

The standard filter fabric materials types can be permeable and specifically designed to perform exactly what the name suggests. The materials filter out the free flow of water from the soil and the underground system, creating a barrier that prevents in-situ dust and particles from settling into the backfill. The water filter cloth is more common with systems of infiltration, which rely on the surrounding space to hold the runoff.

When Civil Engineering vocabulary flashcards were developed, the words "Woven" and "Non-Woven" geotextiles would surely add to the list. Non-woven geotextiles are made from the fibres of polypropylene that are needle-punched.

What is Needle Punching?

Needlepunching involves a mechanical procedure that binds the fibres of future geo filter fabric. After the process is completed, the product is similar to felt but without a variety of colours that are commonly available in craft shops. Colour choices include black and black.

The option of fabric weight, however, does offer some additional alternatives. The filter cloth manufacturers in India provide geotextiles made of light, medium, and heavyweight and are priced by ounces per square yard (oz/sy). The lighter-weight fabrics are fabrics that are not woven. They are designed to be used in underground storage systems for detention. 

• The heavy and middle geotextiles have more utility for stabilization and erosion applications.

Woven geotextiles are less popular for use in underground detention. The woven filter fabric manufacturer offers geotextiles for road designs, load stabilization erosion control, and landfill leachate collection methods. Much like non-woven fabrics, geotextiles made of woven materials are constructed using polypropylene fibres in their form. However, the fibres are woven individually for greater strength within the fabric, which makes them more suitable for the above-mentioned applications. After it's finished, the geotextile is similar to a burlap sack.

• The location and position of the geotextile may vary from project to project, according to the specifications of the Civil Engineer. Certain projects might require just the bottom and sides of the excavated trench to be covered in fabric; others might also need the top. No matter the specific place of the fabric, one of the major problems that could be encountered is an unaccounted-for waste element. The biodegradable filter fabric is utilized in construction and engineering applications to reduce landfill waste.

• The ideal scenario is to place an entire roll of fabric side-to-side with a neatly wrapped trench. However, reality isn't so neat and clearly defined. In real-world installations, there is a need for an overlap of fabrics as the roll shrinks and a new one begins. The overlapping across the whole system is accounted for as "waste". Also, some fabrics will inevitably be damaged during the process of installation, which adds to the amount of waste. In estimating the fabric needed for a particular system, the safety element is typically included to account for the amount of waste generated during the installation.

• A barrier surrounding the infiltration device will prolong the life of an infiltration system and its function while keeping the required backfill gaps free and clean of particles. Solid systems also gain from the engineered transition between the origin material and the backing.

 Conclusion 

Shankar Techx is a leading filter materials and flat belts supplier. We supply fabrics with uniform porosity and air permeability across the width and length of the fabric. We use spun Polypropylene, polyester, and various other multifilaments to develop technical textiles. Our filtration products are ideal for filter press cloths, filter belts, sparkler filters, Fluid bed filter centrifuge filters and many more in various sectors. For more details on our technical textiles, contact us now.

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