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Three-dimensional composite drainage network

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  • PRODUCT DETAILS
  • three-dimensional composite drainage network
    The three-dimensional drainage network (also known as three-dimensional geotechnical drainage board, tunnel drainage board, drainage board) is composed of a three-dimensional structure of plastic mesh double-sided bonded seepage geotextile, which can replace the traditional sand and gravel layer, and is mainly used for landfill Drainage of the site, roadbed and the inner wall of the tunnel.
     
    Function characteristics
    1. It is laid between the foundation and the bottom base to drain the accumulated water between the foundation and the bottom base, block the capillary water and effectively integrate into the edge drainage system. This structure automatically shortens the drainage path of the foundation, greatly reduces the drainage time, and can reduce the amount of selected foundation materials used (I. e., materials with more fines and lower permeability can be used). Can extend the service life of the road.
    2. Laying three-dimensional composite drainage net at the subbase can prevent the subbase fine material from entering the ground base (that is, it plays an isolation role). The aggregate base course will enter the upper part of the geotextile to a limited extent. In this way, the composite geotechnical drainage network also has a potential to limit the lateral movement of the aggregate base. In this way, its effect is similar to that of the geogrid. Generally speaking, the tensile strength and rigidity of the composite geotechnical drainage net are better than many geogrids used for foundation reinforcement. This restriction will improve the supporting capacity of the foundation.
    After the road is aging and cracks are formed, most of the rainwater will enter the section. In this case, the three-dimensional composite drainage network is laid directly under the road surface instead of the drainable foundation. The three-dimensional composite drainage network can collect moisture before it enters the foundation/subbase. Moreover, a layer of film can be wrapped at the bottom of the three-dimensional composite drainage network to further prevent moisture from entering the foundation. For a rigid road system, this structure allows the design of the road with a higher drainage coefficient Cd. Another advantage of this construction is that it is possible to hydrate the concrete more uniformly (studies are underway to the extent of this advantage). Whether for rigid roads or flexible road systems, this structure can extend the service life of the road.
    4, in the northern climate conditions, laying three-dimensional composite drainage network can help reduce the impact of frost heave. If the freezing depth is very deep, the geonet can be laid in a shallow position in the subbase as a capillary blocking. In addition, it is often necessary to replace it with a granular subbase that is not easy to frost, extending down to the freezing depth. The backfill soil that is easy to frost heave can be directly filled on the three-dimensional composite drainage network until the ground line of the foundation. In this case, the system may be connected to a drainage outlet, so that the water table is at or below this depth. This can potentially limit the development of ice crystals without limiting traffic loads during spring ice melt in cold regions.
     
    Product use
    Mainly used for railway, highway, tunnel, municipal engineering, reservoir, slope protection and other drainage engineering effect is remarkable.
     
    Product Features
    1. Strong drainage (equivalent to one meter thick gravel drainage).
    2. High tensile strength.
    3. Reduce the probability of geotextile embedded mesh core and maintain long-term stable drainage.
    4. Long-term high pressure load (can withstand about 3000Ka compression load).
    5. Corrosion resistance, acid and alkali resistance, long service life.
    6. Convenient construction, shorten the construction period and reduce the cost.
     
    Joints and laps
    1. Adjust the direction of the geosynthetic material so that the length of the material roll is perpendicular to the road.
    2. The composite geotextile drainage net must be terminated, and the geotextiles on the adjacent geotextile cores shall be overlapped along the material roll.
    3. Connect the geotextile cores of adjacent geotextile material rolls with white or yellow plastic buckles or polymer tapes to connect the material rolls. Connect with tape every 3 feet along the length of the roll.
    4. The direction of overlapping geotextile shall be consistent with the direction of packing stacking. Where the geotextile is placed between the foundation/base and sub-base, continuous wedge welding, tack welding or stitching shall be performed to secure the top layer of the overlapping geotextile. If stitched, it is recommend to use flat-head stitching or general stitching to achieve the minimum stitch length requirements.
     

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