Composite Drainage Network
Drainage composites are a type of geosynthetic product that collect and transport water to drainage outlets. They relive hydrostatic pressure buildup against subterranean surfaces and are often used for landscape, athletic field, foundation and green roof drainage.
Their core structure consists of three-dimensional geonets, both sides of which are needle stick perforated nonwoven geotextile, with “filtration drainage protection” comprehensive performance.
Benefits
Aside from being a cost-effective solution, composite drainage materials also deliver improved performance compared to traditional alternatives. They are designed to efficiently redirect excess water away from structures and prevent soil erosion and other problems caused by standing water. Additionally, they are highly resistant to clogging. Unlike gravel or sand, they can be easily cleaned and don’t require any maintenance for long periods of time.
The core of the 3D composite drainage network is a HDPE geonet heat-bonded on one or both sides with nonwoven needle punched geotextiles. This allows it to be a geosynthetic material that can replace sand and gravel in various applications. It can also improve the tensile and shear strength of soil, increase its stability, and slow down soil erosion and landslide occurrence.
It is also ideal for use as the bottom layer of vegetation coverage systems, because it can help promote plant growth and provide good ventilation conditions. It can also provide a suitable base for construction of roadbeds, railways, tunnels, and underground structures.
In addition, it can be used to mitigate the effects of earthquakes. Its high-discharge capacity Biaxial PP Plastic Geogrid drains can quickly dissipate the excess pore pressures generated during dynamic loading and prevent them from rising to levels that could cause liquefaction. This is particularly important in loose sandy soils. The geocomposite is a durable, breathable and cost-effective material for a wide range of civil engineering projects.
Applications
In vertical applications (retaining walls, foundation drainage, chimney drainage) geocomposites reduce hydrostatic pressure by conveying groundwater away from the structure to designated drainage exits. In horizontal applications (roof drainage, planting beds, parking decks, plaza decks, balconies) they direct surface water to avoid pooling and subsequent damage to plant material.
A multi-linear drainage composite consists of a grid of perforated mini-pipes sandwiched between two or more geosynthetics, usually a geotextile. The pore-filled geotextiles act as separation and filtration layers, while the drainage conduits prevent soil particles from clogging the flow. The result is a robust, high-performance drainage solution that can replace conventional French drains and other aggregate drainage systems.
These geocomposites are also effective in intercepting and conveying leachate in landfill liner and cover systems, and for conducting vapor or water beneath pond liners of all types. They are also used to reinforce and isolate frost heave zones in road construction.
A three-dimensional composite drainage net is a new type of dewatering geosynthetics. It is composed of a tri-dimensional geonet coated with needle-punched non-woven geotextiles on both sides. The network core consists of a tri-dimension thick vertical rib and inclined rips on the top and bottom. The double-sided adhesive seepage geotextiles form a “filtration — drainage – ventilation – protection” system and can substitute traditional sand and gravel.
Production Process
The three-dimensional composite drainage network (also known as the tunnel drainage water board, seepage discharge geotextile and the drainage layer) is a new type of dewatering geosynthetic that can be used to replace traditional sand and gravel layers. It is mainly used for the drainage of landfills, roadbeds and tunnel inner walls. It can also be used to reduce frost heave in northern climates.
It is made from high-density polyethylene as raw material and processed through a special extrusion molding process. It has a unique structure that combines a geonet High Strength Plastic Geocell core with non-woven needle punched geotextiles stuck on both sides. This combination provides a complete “reverse filtration drainage protection” function. It is characterized by its strong drainage ability (equivalent to one meter thick gravel drainage), low probability of geotextiles being embedded into the mesh core and long term stable drainage performance. It can also withstand high pressure loads for a long period of time.
The automatic forming device for the composite drainage net is easy to operate and has a compact structure. The device can save construction space and shorten the construction period. The device can also improve the quality of the finished product. It is designed to eliminate the need for manual bonding of the upper and lower cladding layers to the drainage net. This helps to increase the accuracy of the bonding work, which in turn leads to better drainage and improved durability.
Pricing
TDCDN-4: Three dimensional composite drainage network is a new type of dewatering geotechnical material which can complement or replace sand, stone and gravel. It consists of a HDPE geonet heat-bonded on one or both sides with nonwoven needle punched geotextile. The network core is a tri-dimensional structure which can drain underground water quickly and protect the foundation from capillary water.
Compared with traditional French Drains, composite drainage networks can provide significant savings in both construction and operation costs. Specifically, the cost of installation is lower since it doesn’t require senior technicians or special construction tools; the product can be constructed with ordinary cutting and hammering tools. In addition, the product is much more convenient to store and transport. Moreover, its performance is superior to that of other drainage pads.