Kunming municipal landfill construction project

Project name: Kunming municipal landfill construction project
Product: HDPE Geomembrane, Geotextile, Geosynthetic Clay Liner and Three-Dimensional Composite Drainage Network
Project situation:
In 2023, The government of Kunming, Yunnan province, has found that landfill capacity is insufficient, resulting in the inability to deal with local waste in time and high waste disposal costs.In response to the current situation, Kunming government has put forward three rectification plans: Treatment of landfills, alternative disposal measures for territorial domestic waste, and the construction of domestic waste incineration facilities.Ensure that the harmless treatment rate of urban solid waste in counties (cities) and districts shall remain 100% during 2022-2023. The government aims to complete the Kunming landfill project with a storage capacity of 4.4848 million square meters by December 31, 2023.

The construction plan:
Geomembrane, as an environmental protection impermeable material, has good ductility and strong adaptability. If the foundation with large deformation is used as the foundation of impermeable structure, the application of geomembrane can better adapt to the deformation of foundation. At the same time, the construction of geomembrane is relatively simple, the requirements for equipment investment are not high, its weight is light, and it is easier to handle and store than traditional impermeable materials. Geomembrane construction is convenient and the construction period is relatively short. At the same time, from the economic point of view, the geomembrane investment is small, the comprehensive cost is low, especially compared with the traditional seepage prevention scheme, the economic advantages are obvious.

Geotextiles are used in association with landfill projects and are embedded into the soil to provide stability to the ground surface. The layer of the geotextile is permeable which enables water to float freely through the soil layer without eroding away the soil. The geotextile can also be used to separate soil and reinforce the soil as a foundation of the landill project. Geotextiles can be used for a wide variety of projects due to its strength and drainage characteristics.The Polyester(PET) Filament Nonwoven Geotextile is a sort of permeable geosynthetic material that can be durably used for separating, filtering, reinforcing, protecting, retaining or draining soil.

Geosynthetic Clay Liner (GCL) is composed of three layers, the upper and lower layers are respectively geotextiles, mainly plays a protective and reinforcement role, so that it has a certain overall tear strength and tensile strength;  In the middle is sodium bentonite granular layer, it is processed from natural clay mineral material, with high expansibility and high water absorption capacity, low water permeability when wet, mainly plays a role in anti-seepage. Mainly used in environmental engineering waste landfill, underground reservoirs, underground infrastructure construction and other projects, to solve the sealing, isolation, anti-leakage problems, good effect, strong damage resistance. They have the unique ability to seal around penetrations, self-heal punctures, and self-seam at the overlaps.

Three dimensional composites drainage network is a new type of drainage geotextile material.  It is one three-dimension geonet composited with two needle-punched non-woven geotextiles.  Three dimensional composites drainage network consists of a tri-dimension thick vertical rib, and a inclined rip on the top and bottom.  Double sided adhesive seepage geotextiles form a "filtration - drainage - ventilation - protection" overall performance, and can replace the traditional sand and gravel.  Its pore maintenance system can drain underground water quickly, block the capillary water under high load in construction, keep certain thickness and provide good water conductivity property.  At the same time, it can also play the role of isolation and foundation reinforcement.