Yunnan Zhaotong three-dimensional composite drainage network customization

Three-dimensional composite drainage net is a new type of geosynthetic material. The structure is a three-dimensional geonet core with needle-punched non-woven geotextile adhered to both sides. The three-dimensional geonet core consists of a thick vertical rib and diagonal ribs at the top and bottom. Groundwater can be quickly drained from the road itself and there is a pore maintenance system that blocks capillary water under high loads. At the same time, it can also play a role in isolation and foundation reinforcement. A new type of geosynthetic material. Three-dimensional composite drainage network 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 with permeable geotextile. It can replace the traditional sand and gravel layer and is mainly used for Drainage of landfills, roadbeds and tunnel linings.
Technical parameters and product specifications of composite geosynthetic drainage network
In transportation infrastructure such as railways and highways, the safety and service life of the project are closely related to its own drainage system. Geosynthetic materials are an important part of the drainage system. Part.
Three-dimensional composite drainage net is a new type of geosynthetic material. The structure is a three-dimensional geonet core with needle-punched non-woven geotextile adhered to both sides. The three-dimensional geonet core consists of a thick vertical rib and diagonal ribs at the top and bottom. Groundwater can be quickly drained from the road itself and there is a pore maintenance system that blocks capillary water under high loads. At the same time, it can also play a role in isolation and foundation reinforcement. A new type of geosynthetic material.
Characteristics of three-dimensional composite drainage network:
, when the load gradient is %, the permeability/d flow rate/.
, Creep test retains more than % thickness after bearing load for hours
, Three-rib drainage mesh core carbon black content is not less than % density./Tensile strength is not less than./Melt index./Thickness ..
, Non-woven geotextile apparent pore size. Water permeability. -Permeability./Puncture strength Trapezoidal tear strength Hold tensile strength Hold ductile strength % Burst strength.
Functional characteristics of the three-dimensional composite drainage network:
It is laid between the foundation and the base to drain the accumulated water between the foundation and the base to block capillary water and effectively integrate into the edge drainage system. This structure automatically shortens the drainage path of the foundation. Drainage time is greatly shortened and the amount of selected foundation materials can be reduced (i.e. materials with lower permeability with more fines can be used). It can extend the service life of the road.
Laying a three-dimensional composite drainage net on the subbase can prevent fine materials from entering the foundation layer (that is, it plays an isolation role). The aggregate base will penetrate into the upper portion of the geonet to a limited extent. In this way, the composite geotechnical drainage net also has the potential to limit the lateral movement of the aggregate base layer. In this way, its function is similar to the reinforcing effect of geogrid. Generally speaking, the tensile strength and rigidity of composite geogrids are better than many geogrids used for foundation reinforcement. This limiting effect will improve the support capacity of the foundation.
After the road ages and cracks form, 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 drainage foundation. Three-dimensional composite drainage mesh can collect water before it enters the foundation/subbase. Moreover, a layer of film can be wrapped on the bottom of the three-dimensional composite drainage network to further prevent moisture from entering the foundation. For rigid road systems this structure allows roads to be designed with higher drainage coefficients d. Another advantage of this structure is that it may allow the concrete to hydrate more evenly (research into the extent of this advantage is ongoing). Whether it is a rigid road or a flexible road system, this structure can extend the service life of the road.
. Laying a three-dimensional composite drainage network in northern climate conditions can help reduce the impact of frost heave. If the freezing depth is very deep, the geonet can be laid in a shallower position in the base to act as a capillary blocker. In addition, it is often necessary to replace the granular subbase extending downward to the freezing depth with a granular subbase that is not susceptible to frost heaving. Backfill soil that is prone to frost heaving can be filled directly on the three-dimensional composite drainage network until the ground line of the foundation. In this case the system can be connected to a drainage outlet so that the water table is at or below this depth. This could potentially limit the development of ice crystals during spring ice melt in colder regions without limiting traffic loads.
Seams and overlaps of three-dimensional composite drainage nets:
Adjust the direction of the geosynthetic material so that the length of the material roll is perpendicular to the road.
The composite geotechnical drainage net must be terminated and the geotextiles on the adjacent geonet cores should be overlapped along the material roll.
Connect the geonet cores of adjacent geotechnical material rolls with white or yellow plastic buckles or polymer tapes to connect the material rolls. Tape every foot along the length of the roll of material.
The direction of the overlapping geotextile should be consistent with the direction of filling. If the geotechnical material is laid between the foundation/base course and the subbase, continuous wedge welding, flat head welding or sewing is required to fix the upper layer of the overlapping geotextile. If suturing, it is recommended to use flat stitch or regular stitch to achieve the minimum stitch length requirements.
Geotextile specifications: grams - grams composite geomembrane specifications: one cloth, one film, two cloths, one film, grams D geomembrane/geotextile/D geomembrane (waterproof board) three-dimensional vegetation mesh grams/gram/gram/ Various types of geotechnical cell three-dimensional drainage nets (also known as three-dimensional geotechnical drainage panels, tunnel drainage panels, drainage panels) are composed of three-dimensional plastic mesh double-bonded water-permeable geotextiles that can replace traditional sand and gravel. The layer is mainly used for drainage of landfills, roadbeds and tunnel inner walls.