Installation and construction method of geotextile (the most comprehensive and strictest)

Storage, transportation, and processing of geotextile

To effectively cover storage, transportation, and processing of geotextiles, you can structure your content as follows:

Storage of Geotextiles

• Indoor vs. Outdoor Storage: Explain the advantages and disadvantages of storing geotextiles indoors versus outdoors. Highlight factors like exposure to UV rays, moisture, and temperature variations.

• Handling Requirements: Provide guidelines on how to handle geotextiles to prevent damage during storage. Include instructions for stacking, rolling, and protecting rolls from dirt and debris.

• Storage Conditions: Detail ideal storage conditions such as temperature and humidity levels. Mention specific recommendations from manufacturers for different types of geotextile.

Transportation of Geotextiles

• Packaging: Describe how geotextiles are typically packaged for transportation (e.g., rolls, folded sheets). Discuss packaging materials and their protective role during transit.
• Loading and Unloading: Provide best practices for loading and unloading geotextiles to prevent damage. Include safety considerations and equipment recommendations (e.g., forklifts, cranes).
• Transportation Modes: Discuss considerations when transporting geotextiles by truck, rail, or sea. Highlight challenges specific to each mode and how they can be mitigated.

Processing of Geotextiles

• Cutting and Fabrication: Explain methods for cutting geotextiles to specific dimensions. Discuss fabrication techniques such as heat sealing, sewing, or ultrasonic welding.
• Installation Preparation: Outline steps involved in preparing geotextiles for installation. Include surface preparation and quality control measures.
• Quality Assurance: Describe procedures for ensuring the quality of geotextiles during processing. Mention testing methods and standards that may apply.

By structuring your content around these aspects, you can create a comprehensive guide that covers the storage, transportation, and processing of geotextiles effectively.

The laying method of geotextile

The method of laying geotextile is a critical part of ensuring its effectiveness in various applications, such as drainage, soil stabilization, or erosion control. Below is a general guide on how to properly lay geotextile:

Preparation

• Site Inspection: Assess the site conditions to ensure it is suitable for laying geotextile. Remove any large stones, roots, or other debris that could damage the geotextile.
• Surface Preparation: Ensure the surface is even and compacted to provide a stable base for the geotextile. If the surface is uneven, grade and level it as required.

Cutting the Geotextile

• Measurement: Measure the area where the geotextile will be laid to determine the required amount of material.
• Cutting: Cut the geotextile fabric to the desired lengths, allowing for an overlap of at least 30 cm (12 inches) between adjacent sheets.

Laying the Geotextile

• Starting Point: Begin laying the geotextile from one end of the area, ensuring it is placed flat against the ground without any wrinkles or folds.
• Unrolling: Unroll the geotextile in the direction of the work, keeping it taut and ensuring it conforms to the contours of the ground.
• Overlap: Overlap adjacent pieces of geotextile by at least 30 cm (12 inches). For areas with heavy traffic or where higher strength is needed, overlap can be increased to 60 cm (24 inches).

Securing the Geotextile

• Anchoring: Secure the geotextile with suitable anchors, such as U-pins or stakes, spaced evenly along the edges and at overlaps. In windy conditions, it may be necessary to place additional anchors to keep the fabric in place.
• Filling and Covering: Once the geotextile is in place and secured, cover it with the specified material, such as gravel, soil, or aggregate, depending on the application. Ensure the covering material is spread evenly to avoid any displacement or damage to the geotextile.

Inspection

• Final Check: After the geotextile has been laid and covered, inspect the entire area to ensure there are no exposed sections or damage. If any damage is found, repair it by placing a new piece of geotextile over the affected area, ensuring adequate overlap.

Completion

• Finishing Touches: Once the geotextile is fully covered and the final layer is in place, compact the surface if necessary. This helps to ensure that the geotextile remains stable and effective over time.

By following these steps, the geotextile can be laid effectively, providing long-term performance in its intended application.

Basic requirements for laying geotextile

Fundamental Criteria and Guidelines for Laying Geotextile:

Site Preparation:

• Clearing and Grading: Ensure the area is free from debris, sharp objects, and vegetation.
• Surface Leveling: The ground should be smooth and uniform to prevent damage to the geotextile.

Material Selection:

• Geotextile Type: Choose the appropriate geotextile (woven, non-woven, or knitted) based on the specific project requirements.
• Quality Standards: Ensure the material meets the necessary specifications and standards for strength, permeability, and durability.

Installation Process:

• Unrolling: Carefully unroll the geotextile to avoid wrinkles and folds.
• Alignment: Ensure the geotextile is properly aligned with the project layout.
• Overlap: Maintain adequate overlap (typically 0.3 to 0.6 meters) between adjacent sheets to ensure continuity and strength.

Anchoring and Securing:

• Anchoring: Use pins, staples, or other anchoring methods to secure the geotextile in place, especially in windy conditions.
• Tensioning: Ensure the geotextile is taut but not overstretched to avoid tearing.

Protection During Installation:

• Covering: Protect the geotextile from direct sunlight and mechanical damage during installation.
• Foot Traffic: Minimize foot traffic on the geotextile to prevent punctures and tears.

Backfilling:

• Layering: Carefully place backfill material in layers to avoid shifting or damaging the geotextile.
• Compaction: Compact each layer to the required density to ensure stability and performance.

Inspection and Quality Control:

• Visual Inspection: Regularly inspect the geotextile for any damage or defects during and after installation.
• Testing: Conduct tests to verify the installation meets the project specifications and performance criteria.

Geotextile laying process requirements

Site Preparation

• Clearing and Grading: Ensure the site is clear of debris, rocks, and vegetation. Grade the area to achieve a smooth surface.
• Compaction: Compact the subgrade to the required density to provide a stable base.

Geotextile Selection

• Material Specification: Choose the appropriate geotextile based on project requirements, including type, strength, and permeability.
• Roll Inspection: Inspect geotextile rolls for damage and ensure they meet specified standards.

Laying the Geotextile

• Orientation: Unroll the geotextile in the specified orientation, ensuring it covers the intended area without folds or wrinkles.
• Overlap: Overlap adjacent sheets by a minimum of 300 mm (12 inches) or as specified in the project guidelines.
• Securing Edges: Secure the edges of the geotextile using pins, staples, or weights to prevent movement during installation.

Seaming and Joining

• Sewing: Use appropriate stitching techniques to join geotextile sheets if required. Double-stitched seams are commonly recommended.
• Heat Bonding: For certain types of geotextiles, heat bonding may be used to join sheets, ensuring a secure seam.

Anchoring

• Trench Installation: For areas prone to erosion, bury the edges of the geotextile in a trench to anchor it firmly.
• Weighting: Use sandbags, rocks, or other weights to hold the geotextile in place, especially in windy conditions.

Backfilling and Covering

• Material Placement: Carefully place backfill material over the geotextile, ensuring even distribution to avoid displacement.
• Compaction: Compact the backfill material to the required density, taking care not to damage the geotextile.

Inspection and Quality Control

• Visual Inspection: Conduct a thorough visual inspection to check for damage or misalignment.
• Testing: Perform necessary tests to ensure the geotextile installation meets project specifications.

Adhering to these requirements ensures the effective performance and longevity of geotextile installations. Proper site preparation, careful handling, and quality control are crucial to the success of geotextile applications.

Self-inspection and repair of geotextile construction

ll geotextile pieces and seams must be checked. Defective geotextile pieces and stitches must be clearly marked on the geotextile and repaired.

The worn geotextile must be repaired by laying and thermally connecting small pieces of geotextile. The small pieces of geotextile must be at least 200mm longer than the edge of the defect in all directions. The thermal connection must be strictly controlled to ensure that the geotextile patch and the geotextile are tightly combined, and there is no damage to the geotextile.

Before the end of every day of laying, visually inspect the surface of all the geotextiles laid that day to confirm that all damaged places have been marked and repaired immediately, and make sure that the laying surface is free of foreign substances that may cause damage, such as fine needles and small iron nails. Etc., foreign substances that may cause damage, such as fine needles, small iron nails, etc.

The patch material used to fill holes or cracks should be the same as the geotextile.

The patch should extend at least 30 cm beyond the damaged geotextile.

At the bottom of the landfill, if the crack of the geotextile exceeds 10% of the width of the coil, the damaged part must be cut off, and then the two geotextiles must be connected; if the crack exceeds 10% of the width of the coil on the slope, The roll of geotextile was removed and replaced with a new roll.

The work shoes worn by the construction personnel and the construction equipment used should not damage the geotextile, and the construction personnel shall not do things that may damage the geotextile on the laid geotextile, such as smoking or poking the geotextile with a sharp tool.

For the safety of geotextile materials, the packaging film should be opened before laying the geotextile, that is, one roll is laid and one roll is opened. And inspect the appearance quality.

Precautions for installation and construction of geotextile

Geotextile can only be cut with a geotextile knife (hook knife). If cutting in the field, special protective measures must be taken for other materials to prevent unnecessary damage to the geotextile due to cutting;

When laying geotextiles, care must be taken not to let stones, a large amount of dust or moisture, etc., which may damage the geotextiles, block drains or filters, or cause difficulties for subsequent connections, enter the geotextiles or Under the geotextile;

After installation, visually inspect the surface of all geotextiles to identify all damaged landlords, mark and repair them, and make sure that there is no foreign matter that can cause damage to the paving surface, such as broken needles and other foreign objects.

The connection of geotextile must follow the following regulations: Under normal circumstances, there can be no horizontal connection on the slope surface (the connection must be along the contour of the slope surface and not intersect with it), except for the repaired place.

If stitching is used, the stitching thread must be made of the same material as or exceeding the material of the geotextile, and the stitching thread must be made of chemical-resistant and UV-resistant material. There should be an obvious color difference between the suture thread and the geotextile for easy inspection.

Pay special attention to stitching during installation to ensure that no gravel in the soil or gravel covering layer enters the middle of the geotextile.

Damage and repair of geotextile

At the suture joint, re-suturing repair must be performed, and the end of the skipped stitch part must be re-sutured.

In all areas, except for rocky slopes, loopholes or torn parts must be repaired and sutured with geotextile patches of the same material.

At the bottom of the landfill, if the length of the crack exceeds 10% of the width of the coil, the damaged part must be cut off, and then the two parts of the geotextile are connected.

For more information please contact Geofantex Geosynthetics Co., Ltd.