The significant role of non-woven fabric in flood control and anti-seepage. I. Performance of Geotextile
Geotextiles are a modern construction material made from high molecular polymer synthetic fibers such as polyester, acrylic, and nylon. They serve multiple functions, including anti-seepage, isolation, filtration, drainage, reinforcement, and protection. Compared to traditional materials like stone masonry or gravel, geotextiles offer lower investment, simpler construction, shorter project duration, and better performance. Their application in emergency projects has proven effective, not only reducing seepage but also cutting down on time and costs.
II. Functions and Characteristics of Traditional Materials for Flood Control
Historically, flood control relied on materials such as earth, sand, stones, grass bags, and hemp bags. These materials have been widely used due to their availability and effectiveness in preventing seepage. However, they come with disadvantages such as heavy weight, difficulty in transportation, high labor intensity, slow construction speed, and challenges in maintaining consistent quality.
III. Key Features of Geotextiles
Geotextiles are known for their high strength, light weight, good water permeability, corrosion resistance, and wear resistance. They perform several critical functions:
1. **Drainage**: They collect and channel water seepage through the fabric’s structure.
2. **Filtration**: They allow water to pass while retaining soil particles.
3. **Isolation**: They prevent mixing between different soil layers.
4. **Soil Reinforcement**: They increase soil stability by reducing deformation and improving stress distribution.
These properties make geotextiles an ideal choice for flood control and emergency projects, especially when local materials are scarce. Their ease of installation, quick construction, and cost-effectiveness further enhance their appeal.
IV. Construction Methods of Geotextiles
1. **Water Seepage Rescue Techniques**
- **Ditching and Seepage Control**: Digging vertical or sloped trenches along the embankment to redirect water flow.
- **Filtration and Drainage**: Using layered fill materials to manage small-scale seepage.
- **Wall Construction**: Building protective walls using soil-filled bags or woven sacks to block water entry.
2. **Crack Protection Methods**
- **Longitudinal Crack Excavation and Backfill**: Filling stable cracks with compacted soil to prevent further damage.
- **Transverse Crack Trenching**: Excavating trenches perpendicular to cracks and backfilling immediately to stop water penetration.
3. **Anti-Overflow Emergency Measures**
- **Sub-bank Filling**: Raising the levee height using compacted soil.
- **Earth Bag Embankments**: Using grass or woven bags filled with soil to create temporary barriers.
- **Soil Bag Reinforcement**: Covering the water surface with soil bags and filling behind them for added strength.
4. **Pipe and Soil Rescue**
Piping occurs when fine soil particles are washed away through pores, creating channels that can lead to collapse. To address this, a "water-permeable cover" made of non-woven geotextile is placed over the affected area. In severe cases, surrounding wells are constructed to reduce hydraulic pressure and stabilize the site.
5. **Bank Slope Collapse Rescue**
Slopes prone to erosion due to waves, wind, or high water levels can become unstable. To prevent collapse, protective measures such as reinforcing with soil bags, managing seepage, and controlling pore water pressure are implemented.
Http://news.chinawj.com.cn 
Submission:
Submission: Shangdong Oushibao New Materials Co.,Ltd , https://www.oushibaomgo.com