Precautions for HDPE Geomembrane Joints

According to many years of practice, the thickness of the geomembrane is not less than 0.25mm. If it is too thin, it may produce pores and it is easy to be damaged during construction and reduce the seepage prevention effect. In the construction of geomembrane, special attention should be paid to ensure that the laying should not be too tight, not wrinkled, and the splice must be firm.

Precautions for HDPE Geomembrane Joints:

(1) The joint treatment of geomembrane is a key procedure for construction which directly affects the operating life of the project. According to quality inspections, the use of thermal welding is ideal (Special glue can also be used for bonding). The hot welding method is to heat the surface of the PE geomembrane to melt the surface and then combine it by pressure.

(2) The geomembrane is laid in a certain direction and a certain non-adhesive layer of PE film and PET are reserved on both sides of the geomembrane. When laying, the direction of each unit of the geomembrane should be adjusted to facilitate the welding of the two units of geomembrane.

(3) After the geomembrane is laid, it should be pressed with a sand bag to prevent wind movement and there must be no dirt, moisture, dust, etc at the edge joints.

(4) Before welding, adjust the two sides of the PE single film at the seam so that it overlaps a certain wide band and is flat without wrinkles.

(5) When welding, it is welded by technicians with certain experience and welding is carried out by a special welding machine. It is necessary to adjust the temperature and speed (it can also be glued).

According to years of practice, the thickness of the geomembrane is not less than 0.25mm. Too thin may cause pores and it is easy to be damaged during construction and reduce the anti-seepage effect. In the construction of geomembrane, special attention should be paid to ensure that the laying should not be too tight, not wrinkled, and the splice must be firm. The construction should be strictly in accordance with the technical specifications and the five quality barriers of preparation, laying, splicing, inspection and backfilling should be well maintained.