Laying methods for cofferdam geotextile protection

The laying of geotextile protection for cofferdams is a critical engineering step designed to ensure the stability and durability of the cofferdam. The following will detail the laying of geotextile protection for cofferdams to ensure project quality and safety.

1 Preparation before laying

Before laying the cofferdam geotextile, adequate preparation must be carried out. First, make sure the foundation is flat, dry and clean to provide good laying conditions. Secondly, determine the length and width to be laid according to the actual situation, and plan the laying method. Before laying, the foundation should also be treated, such as filling potholes and removing debris, to ensure smooth laying.

2 Laying method

The laying method of cofferdam geotextile mainly includes two ways of horizontal and vertical laying. Horizontal laying refers to laying geotextile in one direction, which is suitable for places with relatively narrow width. On the other hand, longitudinal laying is applicable to places with larger widths such as rivers and reservoirs, where the geotextile is laid with a relatively large width. Regardless of which method is used, a certain overlap width needs to be left when laying the geotextile, generally 0.15m-0.2m, to ensure the close connection between the Geotextiles.

In the laying process, the cofferdam geotextile needs to be paved against the foundation surface, avoiding gaps and waves as much as possible. Keep the flatness and tightness of the geotextile when laying to avoid wrinkles and slack phenomenon. At the same time, pay attention to the consistency of the laying direction to ensure the overall stability of the geotextile.

3 Fixation methods

The fixing methods of cofferdam geotextile include overlapping fixation and nailing fixation. Overlap fixation means that the overlapping parts of the geotextile overlap each other, and the purpose of fixation is achieved by compacting the overlap. Nailing fixation uses steel nails and other items to fix the edges of the geotextile. When fixing, ensure the stability and firmness of the geotextile to avoid shifting and sliding.

4 Precautions for laying

When laying cofferdam geotextile, you need to pay attention to the following points. First of all, make sure that the laying weather is dry and warm, and avoid laying in rainy or humid conditions. Secondly, the geotextile must be kept clean during laying to avoid the adhesion of debris and stains. At the same time, the speed and rhythm of laying should be controlled to avoid sudden stops and turns. Finally, after the paving is completed, acceptance and inspection must be carried out in a timely manner to ensure that the paving quality meets the requirements.

5 Acceptance and maintenance

After the laying is completed, acceptance work needs to be carried out. The acceptance includes checking whether the flatness, tightness, overlap width, etc. of the geotextile laid meet the requirements. At the same time, check whether the fixing method is firm and reliable to avoid shifting and sliding. If problems are found, they should be dealt with and repaired in time to ensure the integrity and stability of the cofferdam geotextile protection.

During use, regular maintenance and upkeep work is also required. This includes removing debris, checking fixing methods, repairing damaged parts, etc. Through regular maintenance and upkeep, the service life of the cofferdam geotextile can be extended and its long-term and stable protective effect can be ensured.

6 Conclusion

In summary, the laying method of cofferdam geotextile protection includes preparation before laying, laying method, fixing method, laying precautions, acceptance and maintenance and other steps. By laying and maintaining it in strict accordance with the requirements, the quality and safety of cofferdam geotextile protection can be ensured, providing a strong guarantee for the stable operation of water conservancy projects.