Year1
- 规格：
- 4-6mm
- 卷长：
- 15米
- 幅宽：
- 2米
Drainage network (also known as geotechnical drainage board, tunnel drainage board, drainage board) refers to a three-dimensional structure of plastic mesh double-sided bonded with water-permeable geotextile, which can replace Traditional layers of sand and gravel are mainly used as drainage materials in landfills, roadbeds and tunnel linings.
Introduction
In transportation infrastructure such as railways and highways, the safety and service life of the project are closely related to its own drainage system
Among which geosynthetic materials are an important part of the drainage system component. The three-dimensional drainage net in the drainage net is a new type of geosynthetic material. The structure is a three-dimensional geomesh core with needle-punched non-woven geotextile adhered to both sides. The three-dimensional geonet core consists of a thick vertical rib, as well as angled ribs at the top and bottom. It can quickly drain groundwater from the road and has a pore maintenance system that can block 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 drainage network
When the load is and the gradient is, the permeability / and the flow rate /.
In the creep test, after bearing the load for several hours, the thickness exceeds that is retained.
, The carbon black content in the three-rib drainage mesh core is not less than, the density, the tensile strength is not less than, the melt index, the thickness
, Non-woven geotextile apparent pore size, water permeability, permeability, puncture strength, trapezoidal Tear strength, hold tensile strength, hold elongation strength, burst strength.
Functional characteristics of the drainage net
It is laid between the foundation and the base to drain the accumulated water between the foundation and the base, block capillary water and effectively integrate into the edge drainage system. This structure automatically shortens the drainage path of the foundation, greatly shortening the drainage time, and can reduce the use of selected foundation materials (that is, materials with more fines and lower permeability can be used). It can extend the service life of the road.
Laying a 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 geodrainage mesh also has the potential to limit lateral movement of the aggregate base. In this way, it acts similarly to the reinforcing effect of geogrids. Generally speaking, the tensile strength and rigidity of composite geotechnical drainage nets 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, drainage mesh is laid directly under the road surface instead of a drainable foundation. Drainage mesh collects moisture before it enters the foundation/subbase. You can also wrap a membrane on the bottom of the drainage net to further prevent moisture from entering the foundation. For rigid road systems, this structure allows roads to be designed with higher drainage coefficients. 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 for rigid or flexible road systems, this structure can extend the service life of the road.
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