Geomembrane Today, with the increasing attention paid to environmental protection, the management and transformation of garbage dumps has become an indispensable part of the sustainable development of cities. Among them, the application of geomembranes, especially in the laying of garbage dumps and the construction of rainwater and sewage diversion systems, not only effectively improves the anti-seepage performance of garbage dumps, but also greatly promotes the collection of rainwater and the isolation of sewage, achieving resource efficiency. The dual goals of maximum utilization and environmental protection. This article will deeply discuss the technical details, operational points and environmental benefits of laying geomembranes in garbage dumps and the construction of rainwater and sewage diversion covering membranes.
一. The importance of geomembrane in garbage dump layingGeomembrane, as a polymer synthetic material, plays a vital role in landfill construction because of its excellent anti-seepage performance, good physical and mechanical properties and chemical stability. It can effectively block the infiltration of landfill leachate into groundwater and soil, reduce the risk of groundwater pollution, and protect the surrounding ecological environment. At the same time, the geomembrane also has a certain tensile strength and elongation, and can withstand the pressure and deformation generated during the landfill process, ensuring the long-term stable operation of the landfill.
二. Preparations for geomembrane laying in garbage dump
1. Site survey and design: Before laying, it is necessary to conduct detailed site survey of the garbage dump, understand the geological conditions and hydrological conditions, and design a reasonable anti-seepage system scheme based on the actual situation. Including determining the type, thickness, laying level and connection mode of geomembrane, etc.
2. Foundation Treatment: Ensure that the foundation in the laying area is flat and free of sharp objects, and if necessary, compact or lay a sand cushion to provide good support and protect the geomembrane from damage.
3. Material and equipment preparation: select geomembrane materials that meet the standards, and check their appearance quality, physical and mechanical properties and other indicators; At the same time, prepare the required mechanical equipment, welding equipment, testing tools, etc. for laying.
三. Geomembrane laying and welding technology
1. Laying method: The roll laying method is usually used, that is, the geomembrane is first transported to the laying site in rolls, and then unfolded in the predetermined direction, and pressed while laying to ensure that the membrane surface is smooth, wrinkle-free and suspended. During the laying process, attention should be paid to the directionality of the membrane material. Generally, it is laid along the slope of the garbage dump to reduce slippage.
2. Welding technology: The connection between geomembranes adopts hot melt welding or extrusion welding to ensure welding quality. Before welding, clean the membrane surface to remove impurities such as oil and moisture; During the welding process, the temperature, pressure and time are strictly controlled to ensure the weld is firm and good sealing. After welding is completed, weld quality inspection is required, including visual inspection, air pressure inspection or electric spark inspection, etc., to ensure that there is no missing welding or virtual welding.
四. Construction of rainwater and sewage diversion covering film
Laying a covering film above the garbage dump is one of the key measures to achieve rainwater and sewage diversion. The covering film can not only reduce the infiltration of rainwater into the garbage dump and reduce the amount of leachate produced, but also effectively inhibit the diffusion of odorous gases generated by the garbage and improve the surrounding air quality.
1. Covering film selection: According to the specific situation and needs of the dump, choose the appropriate covering film material. Generally, the covering film is required to have good anti-seepage performance, anti-aging performance, weather resistance and certain load-bearing capacity.
2. Construction points: The laying of the covering film should closely fit the surface of the garbage dump to avoid gaps; In areas with large slopes, reinforcement measures should be taken, such as setting anchorage ditches and laying weight layers, to prevent the covering film from sliding. At the same time, the seam treatment between the covering films is equally important, and a reliable connection method needs to be adopted to ensure sealing.
五. Environmental Benefits and Social Impact
After laying geomembrane in garbage dump and implementing rainwater and sewage diversion covering membrane construction, its environmental benefits are remarkable. On the one hand, it effectively blocks the pollution pathways of landfill leachate to groundwater and soil, and protects groundwater resources and soil environment; On the other hand, through the diversion of rainwater and sewage, the erosion and soaking of rainwater in the garbage dump is reduced, the amount of leachate produced is reduced, and the burden of subsequent treatment is reduced. In addition, the use of covering film also improves the visual effect of the garbage dump and the surrounding air quality, and improves the quality of life of residents.
At the same time, this initiative has also promoted the transformation, upgrading and green development of the waste treatment industry. With the continuous improvement of environmental laws and regulations and the improvement of public awareness of environmental protection, more and more garbage disposal sites have begun to adopt advanced anti-seepage technology and rainwater and sewage diversion measures to achieve a more environmentally friendly, efficient and sustainable garbage disposal method. This not only helps to alleviate the dilemma of urban garbage siege, but also provides strong support for building ecological civilization and realizing harmonious coexistence between man and nature.
In short, laying geomembranes and rainwater and sewage diversion covering membranes in garbage dumps is an environmental protection project of great significance. It can not only effectively solve the environmental pollution problem in the process of garbage disposal, but also promote the rational utilization of resources and the development of circular economy. In the future, with the continuous advancement of technology and the continuous promotion of applications, we have reason to believe that garbage disposal will be more environmentally friendly, efficient and sustainable.
Post time: Jan-06-2025