Composite drainage network

A: composite drainage network (also known as three-dimensional composite drainage network, drainage grid, water supply and drainage geogrid) is a new drainage geotextile material. High density polyethylene (HDPE) as raw material, processed by a special extrusion process is made with a special three-layer structure. Intermediate ribs rigid, longitudinally arranged to form a drain passage, the upper and lower cross ribs form the supporting arrangement prevents the geotextile embedding drain passage, even at very high loads can be maintained high drainage performance. Double-sided adhesive seepage geotextile composite use, a "filtration - drainage - ventilation - Protection" overall performance, is the best drainage material. Usage: mainly used in railway, highway, tunnel, municipal engineering, reservoir, slope protection and drainage projects significant effect. Features: 1. drainage and strong (equivalent to one meter thick gravel drainage). 2. high tensile strength. 3. To reduce the chances of geotextile embedded network core, maintaining long-term stability of drainage. The long withstand high pressure loads (about 3000Ka can withstand compressive load). 5. corrosion, acid, long service life. 6. Construction of convenience, shorten the construction period and reduce costs. Executive Standard: Q / 321081 GTH002-2011 No. Item Unit Index 1 complex mass per unit area g / m 1,200,140,016,002,000 2 mass per unit area of ??the composite deviation% -43 composite longitudinal guide water rate ≥ m / s 1.2 × 10 -44 mesh core and non-woven peel strength ≥ kN / m 0.3 5 network core thickness ≥ mm 5.0 6.0 7.0 8.0 6 network core tensile strength (longitudinal) ≥ kN / m 10.0 7 nonwoven fabric mass per unit area g / m per unit mass of 2008 non-woven area deviation% -59 nonwoven fabric normal permeability coefficient ≥ cm / s 0.3 Note: length can be further customized according to customer processing, special specifications. Second, for geotextile composite drainage network landfill in landfill, the geotextile composite drainage network can be used to: 1, groundwater discharge guide layer 2, layer 3, leak detection, leachate collection discharge guide layer 4, sealing Field gas collection discharge guide layer 5, sealing site surface water collection guide row of three, landfill leachate drainage layer and leak detection layer cushioned system to prevent leakage and ensure the safety of the landfill, leachate exhaust system must have a reliable drainage performance exhaust system to collect leachate liner, leachate ensure saturation head gasket thickness is less than the drainage layer. Traditional sand and gravel and other natural drainage material for landfill leachate collection discharge guide, will take up a lot of landfill space. For leachate drainage slope, using sand and gravel will be difficult to stack. Using geotextile composite drainage network, essentially independent of the slope gradient limit. As gravel leachate collection discharge guide layer, impermeable geomembrane will cause damage. According to statistics, the gravel geomembrane laying geomembrane is the biggest cause of the destruction of more than 70% of the total damage. Three-dimensional geotextile composite drainage network has three-dimensional stereoscopic discharge guide structure, the use of high permeability of geotextile composite, at very high load can maintain long-term performance discharge guide for primary leachate collection discharge guide layer (LCRS), capable of timely discharge of leachate impermeable membrane so that the head is less than the thickness of the material soil drainage, reduce the head caused by excessive seepage geomembrane. Fourth, the landfill closure gas discharge guide layer and surface water discharge guide layer landfill final cover system closure aim is to limit rainfall infiltration inside the landfill to minimize the intrusion of water output may leachate. The closure system, the function of surface water discharge guide layer is covered with soil moisture infiltration discharge to avoid accumulating on the barrier layer. Water will be produced on the closure of excess pore water impermeable layer of stress, may lead to soil vegetation cover slip, closure slope failure. Traditionally used as a sand and gravel site seal surface water discharge guide layer, the steep slopes, sand and gravel cushion of stacked very difficult, and the use of geotextile composite drainage network, can be applied to a steeper slope closure, but also to increase the volume of landfill waste. Three-dimensional geotextile composite drainage network with high conductivity row performance, the ability to exclude surface water seepage closure to ensure the stability of the slope. Closure insufficient gas discharge guide layer landfill closure system exhaust gas discharge guide layer capability or is not set flat gas discharge guide layer, is applied to the impervious layer of the gas pressure is too great, it may lead to closure system to produce destruction. Closure system gas discharge guide layer can use the high conductivity row performance geotextile composite drainage network. The use of high conductivity row three-dimensional geotextile composite drainage network, or geotextile composite drainage net with sand and gravel landfill closure system consisting of a gas discharge guide layer. The use of landfill closure system geotextile composite drainage network as surface water discharge guide layer and a gas discharge guide layer, can be applied to steep slopes, its high performance can lead row and remove water seepage and gas, ensure slope stable. Fifth, landfill or groundwater reservoir discharge guide landfill areas or reservoirs of high groundwater level, groundwater pressure may damage the impermeable liner. It requires groundwater discharge guide layer, rising groundwater discharge so impermeable liner is not damaged. Landfill slopes or dam reservoirs may also be because the water pressure is too great, it may lead to slope or embankment slope of the impermeable layer and cause damage. The use of geotextile geotextile composite drainage network as groundwater discharge guide layer, rising groundwater can be discharged in a very short period of time, to prevent excessive groundwater pressure damage impermeable liner. Geotextile composite drainage network has a higher tensile strength, have reinforced the role of the foundation. Geotextile composite drainage network for dam seepage slopes or lead row, the ability to collect seepage mountain slopes emissions, can effectively eliminate lateral pressure is applied to the impervious layer, to reduce or eliminate damage due to water pressure may cause. Sixth, the railway system may be the railway embankment and drainage water from underground and surface damage. The water table is too high, rising groundwater will erode the roadbed, destroyed railway structure, making subgrade bearing capacity is reduced. From the road surface rain or snow if you can not be discharged, it will be contaminated ballast, mud pumping produced, resulting in adverse consequences rail deformation. Set composite drainage network and drainage layer under the roadbed or ballast basis, excluding the rise of road surface or groundwater seepage. Geotextile composite drainage network has high strength and stiffness, can effectively reinforced levee foundation or ballast to increase their carrying capacity. Drainage for the railway system, can effectively eliminate the generation of frost geotextile composite drainage network with the use of sand and gravel, can form an effective drainage system railway, rapid discharge guide rail groundwater or surface water seepage. Seven highway roadbed and pavement drainage into the free water within the pavement structure is caused or accelerated road damage of important reasons. Hydrodynamic pressure water at high speed lane road tire is directly caused by erosion of the internal mix, the hydrodynamic pressure increases with vehicle speed growing exponentially. Internal road or near free water will shorten the life of the road. If the free immersion water seeps through the pavement subgrade, no matter how thick the road, the road will be torn apart by the loss of the support surface. Setting pavement subsurface drainage system, stagnant water in the pavement structure and subgrade quickly discharged to surface structure, the improved road performance, increase its service life. The design life of the road with good drainage system no drainage path than 2 to 3 times higher. Drainage problems can be solved through the use of the road network geotextile composite drainage. In the road system directly, continuously laying geotextile composite drainage network, not only can get good drainage effect, but also greatly reduce the thickness of the base or subbase, increase capacity, eliminate the differential settlement. Eight, tunnels and retaining wall drainage tunnels or retaining wall abutment back may be due to the water pressure is too large and cause structural damage. Inadequate drainage tunnel liner or drainage layer is not provided, excessive water pressure will destroy the barrier layer, resulting in leakage. If one drainage layer on the barrier layer, the first to collect seepage mountain emissions, eliminate applied to the impermeable liner of pressure to achieve the purpose of preventing leakage. Since the water table behind the retaining wall can not be discharged, excessive water pressure threatens to undermine the retaining wall, retaining wall leading to the collapse. The solution is: Set surface drainage layer behind the retaining wall station, timely discharge of water retaining wall abutment back. Double rib or three-dimensional geotextile composite drainage network as a tunnel or a retaining wall abutment back surface drainage layer, a thin conductive material has a high discharge capacity, construction convenient, its superiority is the traditional sand and gravel materials can not match. The design life of the road with good drainage system no drainage path than 2 to 3 times higher. Drainage problems can be solved through the use of the road network geotextile composite drainage. In the road system directly, continuously laying geotextile composite drainage network, not only can get good drainage effect, but also greatly reduce the thickness of the base or subbase, increase capacity, eliminate uneven settlement stone materials can not match.