In modern civilisation and especially in the construction and landscaping-related works, the geosynthetics or geotextile fabrics act as the unsung heroes. Whether it is stabilising a soft subgrade soil or enhancing drainage in a retaining wall, the geotextile fabric performs essential long-term functions. No matter how accurate the fabric items you choose for yourself, poor preparation and flawed installation practices can not only affect the reputation of the railway project, but also enhance the life risk of the individuals at the same time. 

The success of a geotextile installation isn’t determined solely by the quality of the fabric itself; it is overwhelmingly dependent on the condition of the ground it is placed upon, the handling of the material, and the meticulousness of the pre-installation checks. Besides all these, installing the geotextile fabric is a high-stakes operation, as once covered by soil, it is impossible to remove or replace the fabric. Even in the case of removal, it incurs a huge cost. In this guide from Supreme Geotech, we will dive deep into the ten most critical steps to follow before the installation of the fabric.

Top 7 Geotextile Pre-Installation Checklists to Follow

To ensure the successful Installation of the geotextile, a thorough pre-installation check is absolutely mandatory. The engineers and contractors who are accountable for the verification of the pre-installation procedure must comply with the following 7 aspects. 

• Material verification and documentation check

The first and foremost step of pre-installation is to conduct a thorough material verification. You must confirm that the delivered material matches the specifications approved by the design engineer. We recommend verifying the manufacturer’s certification for the specific batch of materials delivered to you. Before embarking on the journey of installing the geotextile fabric, it is crucial to confirm the mass per unit area, tensile strength and others to match the design requirements for filtration and separation. 

• Subgrade preparation

The second step is to place the geotextile on a clean and smooth surface to prevent damage and ensure uniform function. Don’t forget to remove all the foreign objects such as debris, stones, tree roots and rocks prior to the placement to achieve a finished subgrade which is smooth and levelled. 

• Assessment of moisture content

As the moisture content of the soil leaves an impact on stability and the load-bearing capacity, it is important to test the moisture content. You must ensure that the subgrade is compacted to the design density and has a stable moisture level. It mainly aids in preventing the immediate settlement after loading. 

• Overlap and anchor trench planning

Before the installation, proper anchoring and overlapping are critical to the fabric’s separation and reinforcement integrity. Always mark the required overlap width and placement of the anchor trench as per the drawings. 

• Weather contingency

Geotextile fabrics are vulnerable to high wind flow. Here is why you must have enough ballast bags and heavy anchors ready to hold the fabric steadily. 

• Construction traffic management

Heavy machinery moving directly on geotextile can cause damage and subgrade rutting. So, it’s important to mark a “no-traffic zone” over the exposed fabric. 

• Availability of on-site repair kit

Despite the perfect preparation, wear and tear can happen during the installation process. That’s why, keep a repair kit on-site that includes excess geotextile fabric and adhesive tapes. 

Final Thoughts

Once you adhere to the checklist, installing the geotextile fabric successfully becomes an easy task. The engineers and site supervisors must pay attention to the essential aspects before installation for the effectiveness of the railway projects. To get more insights or to procure geotextile fabrics, visit the website of Supreme Geotech, one of the leading geotextile suppliers in India.

 FAQ: