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HDPE GeomembraneConstruction precautions
*The soil should be solid to avoid uneven settlement and cracks. The turf and tree roots within the anti-seepage range should be removed. A protective layer of fine grained sand or clay is laid on the surface in contact with the membrane
*When laying the geomembrane,do not pull it too tightly.It is better for the parts buried in the soil at both ends to be in a wavy shape. Especially when anchoring with rigid materials, a certain amount of expansion and contraction should be left
*During construction,it is necessary to avoid direct impact of stones and heavy objects on the geomembrane.It is best to lay the membrane and cover the protective layer simultaneously during construction
*Construction workers should wear flat cloth shoes or soft rubber shoes. It is strictly forbidden to wear spiked shoes to avoid damaging the geomembrane. If any damage to the geomembrane is found during construction, it should be repaired in time
Seam
1.The laying of geomembrane
*The surface of the geomembrane should be cleaned and laid as a whole, without any unevenness or concavity.There should be no sharp objects such as stones, iron wires or wooden sticks. Herbicides should be sprayed to kill weeds
*Geomembrane is best laid in a certain direction and should not be stretched too tightly. There should be a certain margin to accommodate the overall deformation
*A certain width of PE film and PE film adhesive layer should be reserved on both sides of the geomembrane. When laying, the direction of each unit of geomembrane should be adjusted properly to facilitate the welding of two units of geomembrane
*After the geomembrane is laid, it should be pressed down with sand belts to prevent wind movement, which may affect the welding of the edge of the geomembrane in the next step, and the cushion layer should be covered in time
2. Welding of geomembrane
*For the laid geomembrane, there should be no dirt, moisture, dust, etc. at the edge seams
*Before welding, adjust the two edges of the PE single film at the joint to overlap to a certain width, and make it flat without wrinkles
*During welding, technicians are responsible for the welding or technical guidance, and professional double-track automatic crawling welding machines are used for the welding
*When welding, control the pressure, temperature and forward speed of the heat sealing machine well to ensure the welding quality
*After welding is completed, timely inspection should be carried out to ensure the integrity of the weld seam. Welding should be done immediately after laying, which increases the difficulty of cleaning over time.
Keywords：
Geomembrane