Waterproof Membrane Impermeable structure
Design Advantages of Composite Geomembrane Impermeability Structure
For everyone to do under the sharing of composite geomembrane under the structure of the design advantages:
1, the laying of the base surface design: (that is, the surface treatment requirements of the dam shell) In order to prevent the composite geomembrane laying along its surface sliding, increase the protective layer (including the face) stability, the upstream pavement shell surface The slope is designed to be 1: 1.0, after excavation, the surface of the brick, stone and * root tree clear, and use the Clamp will surface tight, flat.
2, composite geomembrane design: According to the main features of the product in Table 22.214.171.124, combined with the specific situation of the head of the reservoir, the design selection WCD-1 two cloth a film composite geomembrane.
3, the protective layer design: composite geomembrane seepage effect depends on the construction and operation of the plastic film in the integrity of the process, in order to prevent human trampling, animal and plant damage and reduce the role of light and heat, because they are polymer fiber , It should be particularly to avoid the direct sunlight, so the composite geomembrane should be covered protective layer. The protective layer of the particle diameter can not be too large, otherwise it will pierce the composite geomembrane, the general size of the protective layer of the particle diameter according to the following approximate estimate. Geotextile and geomembrane are now new construction materials, with good waterproof, anti-aging anti-corrosion performance, then what is the relationship between the two? The following is a brief introduction for everyone.
Geotextile is made of non-woven materials, this material is also one of the components of composite geomembrane, geomembrane with geotextile combination, has become a composite geomembrane prototype. Nonwovens itself is used to reinforce the foundation, while with a more comprehensive performance, such as anti-seepage, protection, drainage and so on the performance, at the same time, non-woven anti-corrosion anti-aging performance is relatively good , So its with a high impermeability of the geomembrane combination together, it becomes a more excellent composite geomembrane. So to a certain extent, the quality of geotextile, will directly affect the quality of the film.
In the general engineering, the requirements for the composite geomembrane is very high, not only requires the material can have a higher impermeability, while the foundation in the construction process can also have sufficient flexibility, otherwise the material is easy There is a deformation of the situation, this time will have a serious impact on the construction. So by the addition of geotextile can further enhance the level of membrane material reinforcement, naturally can also improve the efficiency of the construction process. Geomembrane as a new geotextile material, is widely used in water conservancy and other projects, different projects are particularly different, so it has a lot of design indicators, the following we have to understand its physical performance indicators.
Refers to the geomembrane in the 2kPa normal pressure, the top and bottom of the distance between the unit, mm. The thickness of the geotextile varies with the applied normal pressure, and a pressure of 2 kPa indicates the thickness of the geotextile under pressure in the natural state.
The compressive amount of different types of geotextiles is very different, and the compression amount of acupuncture nonwoven geotextiles is the largest. Therefore, when considering the hydraulic characteristics of non-woven geotextiles, it is important to note the characteristics of changes in hydraulic properties due to overburden pressure changes.