Composite drainage network

1. Groundwater drainage guide layer
2. Leakage detection layer
3. Leachate collection and drainage layer
4. Sealing field gas collection guide layer
5. Sealing ground surface water collection and drainage

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1. Adjust the direction of the geosynthetic material so that the length direction of the material roll is perpendicular to the road.
2. The composite geodrainage network must be ended, and the geotextile on the adjacent geomesh core is lapped along the material roll.
3. Connect the geomesh core of the adjacent geomaterial roll with a white or yellow plastic buckle or polymer belt to connect the material roll. Connect strips every 3 feet along the length of the roll of material.
4. The direction of the lap geotextile should be consistent with the direction of the packing pile. If the geotextile is laid between the foundation/base and subbase, continuous wedge welding, flat head welding or stitching shall be performed to secure the top layer of the bonded geofabric. If stitched, the flat head or general stitching method is recommended to meet the minimum stitch length requirement.
I. Structure and performance of geotechnical composite drainage network
Double ribbed geodrainage network is made of high-density polyethylene as raw material, adding carbon black as anti-ultraviolet aging agent, and extruded by a special head. The two interleaved ribs form a drainage channel with high vertical and lateral drainage capacity. The double-ribbed geodrainage network also has higher vertical and horizontal tensile strength and can withstand higher tensile stress and compressive stress.
2. Geotechnical composite drainage network for landfill sites
In landfills, geocomposite drainage networks can be used to:
1. Groundwater drainage layer
2. Leakage detection layer
3, leachate collection guide layer
4. Sealing field gas collection guide layer
5. Sealing ground surface water collection and drainage
3. Landfill leachate drainage layer and leakage detection layer
In order to prevent the leakage of the liner system and ensure the safety of the landfill site, the leachate drainage system must have reliable drainage performance, discharge the leachate collected by the liner system, and ensure that the saturated head of the leachate of the liner is less than the thickness of the drainage layer. Traditional natural drainage materials such as gravel and sand are used to collect and discharge leachate in landfill, which will occupy a large landfill space. For slope leachate drainage, using gravel will be difficult to stack. The use of geotechnical composite drainage network, basically not limited by slope slope. Gravel as leachate collection and drainage layer will cause damage to impervious geomembrane. According to statistics, gravel placement on geomembrane is the biggest cause of geomembrane damage, accounting for more than 70% of the total damage.
Three-dimensional geotechnical composite drainage network has three-dimensional spatial drainage structure, the use of high permeability of geotextile composite, can maintain long-term drainage performance under extremely high load, for the main leachate collection guide layer (LCRS), can be timely discharge of percolate of impervious membrane, so that the head is less than the thickness of geotechnical drainage materials, reduce the geomemofilm leakage caused by excessive head.
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- Composite drainage network