The longitudinal joints of two adjacent frames shall not be on a horizontal line and shall be staggered by more than 1m.
Precautions during geomembrane Construction: A.
G.
During the loading, unloading and handling of geomembrane, any instrument that may cause mechanical damage to geomembrane shall not be used.
Slope first and then site bottom.
Laying of side slope during geomembrane Construction: before laying the HDPE impervious membrane on the side slope, the laying area shall be inspected and measured, and the impervious membrane with matching size in the warehouse shall be transported to the phase I anchor ditch platform according to the measured size.
During laying, the convenient method of “pushing” from top to bottom shall be adopted according to the actual site conditions.
F.
The longitudinal joint shall be more than 1.50M away from the dam toe and bend toe, and shall be set on the plane.
D.
Personnel irrelevant to laying shall not enter the construction site.
During unloading, according to the principle of placing with care, put the wood board evenly on the edge of the truck, roll the anti-seepage membrane roll off the truck slowly manually or mechanically, and stack it neatly.
The anti-seepage membrane coiled material to be laid shall be flattened in the open space and cut into the required shape according to the predetermined scheme.
B.
During geomembrane construction, it shall extend from the bottom to the high position, not too tight, and a margin of 1.50% shall be reserved for local sinking and stretching.
C.
Laying at the bottom of the site during geomembrane Construction: before laying HDPE impervious membrane, the laying area shall be inspected and measured, and the impervious membrane with matching size in the warehouse shall be transported to the corresponding position according to the measured size.
Direct contact between hot tools and geomembrane is strictly prohibited.
Pay attention to finished product protection after geomembrane construction.
The laying of HDPE impervious membrane, whether on the slope or at the site bottom, shall be flat and straight to avoid folds and ripples, so as to align and overlap the two geomembranes.
D.
During laying, it shall be pushed, aligned and erected manually in a certain direction.
H.
before geomembrane laying, ensure that the laying surface meets the design requirements and quality and safety requirements.
In the process of geomembrane construction, the process is as follows: A.
G.
Flood intercepting ditch: the flood intercepting ditch shall be excavated above the anchor ditch to divert external rainwater to prevent water from entering the landfill directly…
E.
E.
Once we deal with the details, we can better understand these in the process of the whole work, and then do some relevant protection, then the geomembrane construction will become more secure.
During slope laying, the film spreading direction shall be basically parallel to the maximum slope line.
H.
C.
The fan-shaped area shall be cut reasonably to ensure that the upper and lower ends are firmly anchored.
anchor ditch: 40 * 40 anchor ditch shall be excavated around to prepare for the anchoring of impervious membrane, which is used to fix HDPE geomembrane and protective geotextile.
The lap width is generally about 10cm according to the design requirements.
The materials and quality of geomembrane and welding rod shall meet the design requirements and the provisions of relevant standards.
Requirements for anchoring during geomembrane Construction: A.
During geomembrane construction, we can really pay attention to the treatment of details, so that there will be no leakage problem.
It is expected to allocate reasonable cutting drawings and plans according to the length and width of materials, and make blanking preparation.
All personnel entering the geomembrane construction site shall wear access cards.
On the geomembrane, all tools must be handled with care, and shall not be thrown or replayed.
Site preparation for Geomembrane Construction: clear the flat open space of more than 8 * 10m around the pool for unloading, setting out and cutting.
Buffer Platform: to ensure the stability of HDPE geomembrane and prevent sliding, a buffer platform is added in the center of the slope, and an anchor ditch is set on the platform to reduce the downward tension of HDPE geomembrane and increase stability.
After HDPE geomembrane and protective layer geotextile are laid, it shall be pressed with concrete plate immediately.
F.
B.
B.
C.
All construction personnel must pay attention to safety.
Lay the film on the flat ground, reasonably calculate and select the best film laying method (taking reducing the number of welding joints and saving geomembrane as the standard).
