1、HDPE geomembrane laying and welding construction should be carried out in temperatures above 5℃, wind below 4 levels and without rain or snow.
2, HDPE geomembrane construction process is carried out in the following order: geomembrane laying → lap welding seam → welding → site inspection → repair → re-inspection → backfill.
3、The lap width of the seam between the membrane and the membrane is not less than 80 mm, and the seam should usually be arranged in a direction equal to the maximum slope line, i.e. along the slope direction.
4, HDPE geomembrane in the laying, should try to avoid the production of artificial wrinkles. When laying HDPE geomembrane, the amount of expansion and deformation caused by temperature changes should be reserved according to the magnitude of local temperature changes and the performance requirements of HDPE geomembrane, in addition to the topography of the site and the geomembrane laying should be reserved for the expansion and contraction of the geomembrane to accommodate uneven settlement of the foundation.
5, HDPE geomembrane paving, should be minimized in the membrane surface walking, handling tools, etc., where can cause harm to the HDPE geomembrane objects, should not be placed on the geomembrane or carried on the geomembrane walking, so as not to cause accidental damage to the HDPE membrane.
6, HDPE membrane construction site of all personnel can not smoke, not wear shoes with iron nails or high-heeled hard-soled shoes to the membrane surface walking, not allowed to engage in all activities that may damage the impermeable membrane.
7, HDPE geomembrane laying is completed, not covered with a protective layer before, should be placed in the corners of the membrane every 2-5m 1 20-40Kg heavy sandbags, to prevent geomembrane is scraped up by the wind.
8, HDPE geomembrane should be natural, and support layer paste solid, should not be folded, overhanging.
9, geomembrane segmental construction, after laying should be completed in time to cover the upper layer, exposed in the air should not exceed 30 days.
10、HDPE geomembrane anchorage shall be constructed according to the design, the project is more complex topography, the construction unit proposed other anchoring methods, should obtain the consent of the design unit and supervision unit before proceeding.
