真空密封膜铺设时需注意以下问题：（1）土工布铺设前要认真清理平整砂垫层

Pay attention to the following problems when laying the vacuum sealing film: <br>(1) Before laying the geotextile, carefully clean the flat sand cushion, remove the shells and sharp stones, and fill the holes left when inserting the plastic drainage board. After laying the geotextile, lay the vacuum film. <br>(2) The size of the membrane should be considered to be buried in the sealing groove during processing, leaving enough room. In order to ensure the sealing effect, the sealing membrane is laid with 2 layers. <br>(3) When the sealing film is heat-sealed, a flat lap joint with double heat sealing seams shall be used, and the lap width shall be greater than 15 cm. <br>(4) When laying, the film should be unfolded in the wind direction, the film should not be pulled too tight, each side should be released 4 m larger than the drawing size, and each layer should be checked and repaired after unfolding. Laying generally starts from one side, and several layers are laid in sequence from near to far. <br>(5) Keep the bonding parts clean when pasting on site. When pasting, move back and forth along the seam from top to bottom. Under the seam, the strip wood board with a length of 1 ~ 2 m should be pressed firmly after being glued, and then the wood board should be drawn out and moved back, and then adhered in turn along the seam. Note that the newly bonded parts cannot be stressed immediately.

The following issues should be noted when laying a vacuum sealing film:<br>(1) Before laying the earthen cloth, we should carefully clean the flat sand mat layer, remove the shells and with pointed-horned stones, fill the hole left by the plastic drainage plate. The earthen cloth is laid and laid with vacuum film.<br>(2) the size of the film in the processing should be considered buried in the sealing ditch part, leaving enough room, in order to ensure the sealing effect, sealing film spread 2 layers.<br>(3) When the sealing film is hot-combined, the flat tie-up of a double heat seam is used, and the tie-up width should be greater than 15 cm.<br>(4) Laying, to the wind to spread the film, the film should not be pulled too tightly, each side than the drawing size to release 4 m, after the expansion of each layer to check repair. Laying generally from one side to one side, several layers together in order at the same time by near and far laying.<br>(5) Keep the bonding area clean when pasting on site. Paste from top to bottom along the mucous seam. In the seam pad 1 to 2 m long strip board, after gluing to press hard, and then the board pulled out and moved, followed by the seam back bonding. Note that the newly bonded area cannot be forced immediately.

Attention shall be paid to the following problems when laying the vacuum sealing film:<br>(1) Before laying the geotextile, the sand cushion shall be carefully cleaned and leveled, the shells and sharp stones shall be removed, and the cavities left when inserting the plastic drainage board shall be filled. After the geotextile is laid, the vacuum membrane is laid.<br>(2) When processing the size of the membrane, the part buried in the sealing groove shall be considered, and enough space shall be reserved. In order to ensure the sealing effect, the sealing membrane shall be paved with two layers.<br>(3) When the sealing film is hot closed, the flat lap joint of double hot seams shall be used, and the lap width shall be greater than 15 cm.<br>(4) When laying, the membrane shall be unfolded along the wind direction. The membrane shall not be pulled too tightly. Each side shall be set out 4 m larger than the drawing size. After unfolding, each layer shall be inspected and repaired. Laying generally starts from one side, several layers are laid from near to far at the same time in sequence.<br>(5) Keep the bonding parts clean when pasting on site. Paste from top to bottom along the seam back. Pad a strip board with a length of 1-2 m under the joint, press it firmly after gluing, then pull out the board and move it backward, and then bond it back along the joint. Note that the newly bonded part cannot be stressed immediately.