**Suqian landfilling, pond seepage prevention, Suqian aquaculture special geotechnical membrane for sealing field, Suqian aquaculture special geotechnical membrane for landfill hygiene landfill seepage prevention system engineering technical specifications. Geotechnical synthetic materials used in landfill seepage prevention system engineering: high-density polyethylene (HDPE) membrane, geotextile, GCL, geotechnical composite drainage net, etc.** **The aquaculture special geotechnical membrane used in the landfill seepage prevention system engineering should meet the relevant requirements of the current national standard "HDPE geotechnical membrane for landfills" CJ/T 234, and also meet the following requirements:** 1. **The thickness should not be less than 1.5mm;** 2. **The width of the membrane should not be less than 6.5m.** **The geotextile used in the landfill seepage prevention system engineering should meet the following requirements:** 1. **It should be combined with the characteristics of the seepage prevention system engineering and should be suitable for the use environment of the landfill;** 2. **When the geotextile is used as a protective material for HDPE membrane, non-woven geotextile should be used, and the specification should not be less than 600g/m2;** 3. **When the geotextile is used as a filter material for blind trenches and leachate collection and drainage layers, the specification should not be less than 150g/m2;** 4. **The geotextile should have good durability.** **The performance characteristics of the HDPE aquaculture special geotechnical membrane used in landfill sealing and seepage prevention include:** 1. **The HDPE aquaculture special geotechnical membrane is a flexible waterproof material with a very high seepage coefficient (1×10-17 cm/s);** 2. **The HDPE aquaculture special geotechnical membrane has good heat resistance and cold resistance, with a maximum operating temperature of 110°C and a minimum operating temperature of -70°C;** 3. **The HDPE aquaculture special geotechnical membrane has good chemical stability and can resist the corrosion of strong acids, alkalis, and oils, making it a good anti-corrosion material;** 4. **The HDPE aquaculture special geotechnical membrane has a high tensile strength, providing it with high tensile strength to meet the needs of high-standard engineering projects;** 5. **The HDPE aquaculture special geotechnical membrane has strong weather resistance and excellent aging resistance, allowing it to maintain its original performance when exposed for a long time;** 6. **The HDPE aquaculture special geotechnical membrane uses three separate feeders, each layer of different ingredients can have unique properties, improving the engineering properties of the HDPE aquaculture special geotechnical membrane;** 7. **The overall performance of the HDPE aquaculture special geotechnical membrane, with strong tensile strength and elongation at break, allows the HDPE aquaculture special geotechnical membrane to be used in various harsh geological and climatic conditions.** **The geotechnical composite drainage net used in seepage prevention system engineering should meet the following requirements:** 1. **The geotechnical net and geotextile in the geotechnical composite drainage net should be pre-bonded, and the bonding strength should be greater than 0.17kN/m;** 2. **The geotechnical net in the geotechnical composite drainage net should be made of HDPE material, with a longitudinal tensile strength greater than 8kN/m and a lateral tensile strength greater than 3kN/m;** 3. **The geotextile in the geotechnical composite drainage net should meet the requirements of section 4.3 of this specification;** 4. **The selection of the drainage rate of the geotechnical composite drainage net should consider factors such as creep reduction, embedment reduction of geotextile, biological clogging reduction, chemical clogging reduction, and chemical precipitation reduction.**
