The construction temperature for geomembranes in landfills is 5-40 ° C. Considering the thermal expansion and contraction performance of impermeable membranes, based on experience, the placement of geomembranes in landfills should be compacted in cold weather and relaxed in hot weather, but attention should be paid to avoiding high temperatures at noon in summer.
In landfills, geomembranes are the key to anti-seepage treatment. Directly below them are drainage pipes and underground water collection and drainage blind ditches, with the aim of effectively controlling the groundwater level and avoiding it. Usually, the rise and support of anti-seepage membranes require limiting the groundwater level to within 2 meters. Stone powder layers, gravel drainage layers, and HDPE sewage pipes need to be laid on top of the anti-seepage membrane, which is used to collect and discharge permeable garbage and protect the anti-seepage membrane from damage from hard or sharp objects. The ideal anti-seepage lining material in landfills is clay that can effectively prevent leakage, but ordinary clay can only delay the leakage of garbage and cannot prevent it.
When carrying out the construction work of geomembranes in landfills, strict adherence to the construction standards of the customs department should be followed. The construction enterprise itself should also have complete and safe construction management capabilities, including relevant professional technical knowledge and construction skills. All mechanical equipment should have complete preparation, testing, and monitoring systems to ensure construction safety.
In terms of environmental protection, construction should strictly follow the relevant standards of the department and comply with relevant laws and regulations, especially the storage and treatment of various chemical and petroleum products generated during the construction process, to prevent groundwater pollution. In addition, attention should be paid to the recycling and reuse of certain materials during the construction process, and non recyclable materials should be treated according to standards to avoid environmental pollution and damage during the construction process.