Geomembrane laying method:
1, before laying geomembrane, the corresponding civil engineering acceptance certificate shall be issued.
2. Before cutting geomembrane, the relevant dimensions should be accurately measured, and then cutting should be carried out according to the actual situation. In general, it is not appropriate to cut geomembrane according to the size shown in the figure. It should be numbered one by one and recorded in detail on a special form.
3. When laying geomembrane, weld seams should be reduced as much as possible, and raw materials should be saved as much as possible on the premise of ensuring quality. At the same time, it is easy to ensure the quality.
4. In general, the lap width of the film indirect joint is not less than 10cm, so that the arrangement direction of the weld is usually parallel to the maximum slope, that is, arranged along the slope direction.
5. Under normal circumstances, in corners and abnormal sections, the joint length should be shortened as much as possible. Except for special requirements, welds shall not be set as far as possible within the range of 1.5m at the top of the slope or in the stress concentration area on the slope with a gradient greater than 1.6.
6, geomembrane in laying, should avoid artificial folding, when the temperature is low, should try to tighten, smooth.
7. After the geomembrane is laid, it is necessary to minimize the walking and moving tools on the membrane surface. Anything that may cause damage to the impermeable membrane should not be placed or carried on the impermeable membrane to avoid accidental damage to the impermeable membrane.
Extended data:
Ductility of geomembrane: the impermeability of plastic film blocks the leakage passage of earth dam, and bears water pressure with its great tensile strength and elongation to adapt to dam deformation; Non-woven fabric is also a short polymer fiber chemical material, which has high tensile strength and extensibility through needling or thermal bonding.
When combined with plastic film, it not only increases the tensile strength and puncture resistance of plastic film, but also increases the friction coefficient of contact surface because of the rough surface of non-woven fabric, which is beneficial to the stability of composite geomembrane and protective layer.