The Critical Role of Non-Woven Fabric in Flood Control and Anti-Mite Applications.
I. Performance of Geotextile
Geotextiles are modern construction materials made from high molecular polymer synthetic fibers such as polyester, acrylic, and nylon. They serve multiple purposes, including anti-seepage, isolation, filtration, drainage, reinforcement, and protection. Compared to traditional materials like stone masonry or concrete, geotextiles offer lower investment, simpler construction processes, shorter project timelines, and better anti-seepage performance. Their use has been successfully implemented in emergency flood control projects, significantly reducing construction time and costs while improving the efficiency of water channels.
II. Functions and Characteristics of Traditional Materials for Flood Control
In traditional flood control methods, two main strategies are used: prevention and emergency response. Common materials include earth, sand, stones, grass bags, and hemp bags. These materials have a long history and proven effectiveness in controlling seepage and erosion. However, they suffer from disadvantages such as heavy weight, difficulty in transportation, high labor intensity, slow construction speed, and challenges in maintaining consistent quality.
III. Advantages of Geotextiles
Geotextiles are known for their high tensile strength, lightweight, excellent water permeability, corrosion resistance, and durability. They perform several key functions:
1. **Drainage**: Geotextiles can collect and channel water from soil, either vertically or horizontally, preventing water buildup.
2. **Filtration**: They allow water to pass through while retaining fine soil particles.
3. **Isolation**: They prevent mixing between different types of soil or aggregates, ensuring structural integrity.
4. **Reinforcement**: Geotextiles enhance soil stability by distributing stress and reducing deformation.
These properties make geotextiles ideal for time-sensitive flood control and rescue operations, especially when local materials like sand and soil are scarce.
IV. Construction Methods Using Geotextiles
Several techniques are used to apply geotextiles in flood control:
1. **Water Seepage Rescue**
- **Ditching and Seepage**: Excavate vertical or sloped trenches along the embankment to collect and drain water.
- **Filtration and Seepage**: Use layered fillings to improve filtration and reduce seepage.
- **Wall Construction**: Build protective walls using soil bags or woven sacks to block water flow.
2. **Crack Protection**
- **Longitudinal Crack Excavation**: Remove damaged soil and backfill with compacted layers.
- **Transverse Crack Trenching**: Excavate and refill cracks to prevent further damage.
3. **Anti-Overflow Measures**
- **Sub-bank Filling**: Raise the embankment height with compacted soil.
- **Earth Bag Embankments**: Use soil-filled bags to create temporary barriers.
- **Wave Wall Reinforcement**: Combine masonry walls with soil bags for added stability.
4. **Piping and Soil Rescue**
- When piping occurs (soil particles being washed away), geotextiles can be used to create a “water-permeable cover†that prevents further erosion. In severe cases, surrounding wells are built to reduce hydraulic pressure.
5. **Bank Slope Collapse Rescue**
- Erosion caused by water flow, wind, and waves can lead to slope instability. Geotextiles help reinforce the slope and manage seepage forces, preventing landslides.
In conclusion, non-woven geotextiles play a vital role in modern flood control and emergency rescue efforts. Their versatility, durability, and ease of application make them an essential material in protecting infrastructure and saving lives during critical situations.
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