Study on The Application of Composite Geomembrane in The Anti-seepage of Water Storage Tank
Abstract: This paper analyzes the material structure, laying method and requirements of composite high quality aquaculture geomembrane, and the actual use in water conservancy projects. It is concluded that in the construction of an anti-seepage project of the reservoir, it should be strictly in accordance with composite LDPE geomembrane manufacturers. The steps and requirements of laying are carried out, and the quality of the composite environmental geomembrane manufacturers materials used is strictly checked, and the supervision of the construction site is strengthened to ensure the anti-seepage function of the entire reservoir project.
Keywords: regulating reservoir; anti-seepage; composite wholesale LDPE geomembrane
Foreword: With the development of the economy and the progress of society, people’s demand for water is increasing, the role of reservoirs is becoming more and more important, and the number of reservoirs is also increasing dramatically. How to ensure the impervious capacity of the reservoir is a hot research topic. Composite high quality aquaculture geomembrane is often used in the anti-seepage structure of hydraulic engineering because of its resistance to permeability, corrosion resistance, and high resistance. It has achieved good results.
1. Water storage tank
A water storage tank is a facility for regulating water flow. It can be a manually constructed building (either above ground storage tanks or underground concrete pools) or natural facilities (such as ponds, lakes, etc.). Initially, its main function is to intercept the water flow when the water flow is large so that the water can be shunted according to the flow, so as to avoid the flood disaster, and after the rainwater drops, the storage water in the reservoir is discharged. Such water storage and peak-to-peak diversion function enable the reservoir to effectively prevent flood explosion and fully utilize the water, and effectively protect the water environment in the natural environment from rainwater pollution. In addition to the role of rainwater regulation, the reservoir has played an increasingly important role in the regulation of irrigation water and people’s drinking water, greatly improving the water supply capacity.
The storage area of the storage tank is generally large, and the construction and construction cost is high. It is necessary to combine the existing conditions as much as possible to construct a multi-functional storage tank. The reservoir is either a natural earthen pond. The most stable one is constructed of concrete. There will be more or less leakage. This requires us to carry out relevant anti-seepage treatment of the reservoir. At present, the most common is the use of composite high quality aquaculture geomembrane for anti-seepage treatment.
2. Composite geomembrane
2.1 Overview of composite geomembrane
Composite high quality LDPE geomembrane is a new type of geotechnical anti-seepage material. It refers to a membrane that is heat-sealed between a film (also called a textured geomembrane for sale) and a geotextile. The film is generally made of polyethylene (PE) or polyvinyl chloride (PVC), and geotechnical. The composition of the cloth is mainly non-woven polyester. Among them, the anti-seepage performance of the film is the decisive factor of the anti-seepage property of the composite environmental geomembrane manufacturers. LDPE geomembrane for sale is also a relatively new technology. It combines with geotextiles to ensure that it is not damaged by sharp objects and that the position between them is fixed.
From the material point of view, composite LDPE geomembrane factory price is still a non-porous material, which not only has a low permeability coefficient but also has strong tear resistance. In addition, composite LDPE geomembrane manufacturers also have many advantages, such as corrosion resistance, low cost, and simple construction. With so many advantages, the composite wholesale LDPE geomembrane is often used in the whole or partial anti-seepage treatment of the reservoir, etc., and is widely used in the daily anti-seepage engineering construction, and has achieved good results.
2.2 Status of the use of composite geomembrane
Although the composite high quality LDPE geomembrane is still in the development stage, it is not particularly mature in technology. Due to the various advantages described above and its high practical value, it is widely sought after at home and abroad. A typical use case abroad is the Pozadelos Ramos dam built in Spain in 1984. It was first built using this technology. It has been in operation for more than 30 years, and the indicators are still normal. Through such an example, we can see the role of composite high quality aquaculture geomembrane in maintaining the quality of hydraulic engineering.
Composite textured geomembrane for sale is not only widely used in foreign countries but is also widely used in our country. Under the premise that the government and the people pay more and more attention to water resources, the development speed of water conservancy construction is advancing by leaps and bounds, and it is more obvious in the arid regions of western China. For example, in the desert area near Tianshan, many water-proof facilities such as anti-seepage channels have been built. In these projects, the selection of effective barrier materials is a very important task, and composite wholesale LDPE geomembrane is undoubtedly the most suitable choice in the current environment. From the end of the last century to the present, two of the five reservoirs built in the Hami area used composite LDPE geomembrane manufacturers. Correspondingly, composite LDPE geomembrane for sale was used as anti-seepage materials in many new controlled hydraulic projects. In the water conservancy reinforcement project, more than two-thirds of the projects use composite environmental geomembrane manufacturers. In other parts of China, composite high quality LDPE geomembrane is also widely used in the anti-seepage work of various reservoirs and has become an indispensable anti-seepage material in water conservancy construction.
With the development and application of related technologies, composite LDPE geomembrane factory price also uses new technologies, making production more rapid and scientific, making production costs lower than traditional materials. At the same time, because the new production process improves the flexibility of the high quality aquaculture geomembrane, it can better meet the anti-seepage requirements of different specifications and various laying requirements in the reservoir.
2.3 Working mechanism and material properties of composite geomembrane
The composite textured geomembrane for sale is a water-impermeable polymer synthetic material, which is a composite formed by the combination of LDPE geomembrane for sale and geotextile and has a strong anti-penetration ability. The environmental geomembrane manufacturers currently in common use are made of plastics such as PE and PVC. They are flexible chemical materials composed of polymer materials. They have a strong appearance and plasticity, as well as light materials and good elongation. And so on, it has the advantages of corrosion resistance and low-temperature resistance, so it has been widely used in actual production.
Composite wholesale LDPE geomembrane as a polymer material, its mechanism of action is to give full play to the waterproof and impermeability of PE or PVC LDPE geomembrane manufacturers, in order to isolate the surface of the water and the reservoir and block the passage of water into the pool. Compared with other materials, its ductility and tensile strength are stronger, and it can adapt to various shapes of the reservoir. At the same time, geotextile is also a polymer material, which is hot-adhesive or acupuncture. The shape also has the characteristics of high quality aquaculture geomembrane. When the two are combined, the advantages become stronger, and the shortcomings of the two are well avoided. Not only the resistance of the high quality LDPE geomembrane is enhanced but also the LDPE geomembrane factory price and geotextile can be made. The friction between the two increases, making it easier to maintain stability between the two.
In addition, the composite environmental geomembrane manufacturers also have a strong resistance to chemical corrosion, high elasticity and deformation force, and is more suitable for treating the building base of the reservoir to alleviate the settlement problem. In addition to the various high resistance, high mechanical strength, corrosion resistance and other characteristics described above, it also has the property of anti-aging and decomposition ability, and it has a long service time, making it a very good anti-seepage material.
3. Practical application in reservoir seepage prevention engineering
With the promotion and application of the corresponding technologies, composite wholesale LDPE geomembrane has been gradually applied in a wide range of applications in water conservancy projects such as reservoirs. However, although composite textured geomembrane for sale has so many advantages, if the operation during construction is not correct, it will also have an adverse effect on the overall barrier properties. Therefore, in the construction of the project, not only should pay attention to the quality of the laying of the high quality aquaculture geomembrane but also the quality of the material of the LDPE geomembrane for sale itself, so as to avoid leakage due to the material quality of the LDPE geomembrane manufacturers itself.
3.1 Construction procedures and principles
The composite LDPE geomembrane factory price anti-seepage structure is generally composed of a base surface, a composite high quality LDPE geomembrane, a protective layer, and a concrete facing. According to its structural composition, it can be seen that in the construction of the project, the construction procedure of the composite environmental geomembrane manufacturers can be summarized into the following steps:
(1) processing the foundation surface and laying the cushion primer;
(2) laying of composite textured geomembrane for sale;
(3) Covering the construction of the protective layer.
The principle of laying LDPE geomembrane manufacturers mainly has the following points:
(1) Strictly check the material and quality of the wholesale LDPE geomembrane in advance to ensure that there are no blemishes and other defects to ensure quality. And use as wide a film as possible, with as little splicing as possible;
(2) The laying surface of the reservoir should be as flat and clean as possible to avoid the presence of sharp objects, and during the construction process, ensure that no sharp tools and articles are used;
(3) In the laying process of composite LDPE geomembrane for sale, the welding method is generally adopted. Under the premise of ensuring the welding quality, it is necessary to ensure that the welding surface is free of debris.
3.2 Method of laying composite geomembrane
Composite high quality textured geomembrane is a kind of polymer synthetic material with very low water permeability. The impermeability of its own material is the premise that the whole membrane is impervious to water. To ensure the quality, the correctness of the laying method must be paid attention to during the construction. The following sections will be introduced separately from the specific steps of the construction process.
3.2.1 Handling the foundation surface and laying the cushion primer
After the earthwork fills and other filling work, the bottom of the reservoir and the embankment are consolidated to ensure that the overall surface is smooth and free of debris, so that it meets the specific requirements of composite high quality aquaculture geomembrane laying. On this basis, the underlying litter is laid. Before laying, the quality of the litter should be inspected. The cement and soil should be proportioned according to the requirements. The technicians should check and accept the requirements. After all the requirements are met, the next step of laying the composite LDPE geomembrane manufacturers can be carried out.
3.2.2 Laying composite geomembrane
In order to maximize the effectiveness of the composite high quality LDPE geomembrane, it should be laid under conditions suitable for temperature and humidity. And pay attention to the following points:
(1) Before the construction, the quality of the composite LDPE geomembrane factory price should be inspected first. The composite environmental geomembrane manufacturers allowed to enter the site must meet the corresponding technical requirements, and the staff should strictly follow the requirements.
(2) Laying the composite LDPE geomembrane for sale in a bottom-up manner, and laying it tightly, while paying attention to keeping the edge of the film flat and conforming to the base surface of the cushion.
(3) It is necessary to pay attention to the geotextile and wholesale LDPE geomembrane welding. The two should be laid flat and aligned before sewing to ensure the joint force. After the stitching, the two are properly welded, and in the appropriate temperature and humidity environment, the appropriate welding parameters are selected to ensure the welding quality, and finally, the effectiveness of the welding is checked.
3.2.3 Construction and installation covering the protective layer
After laying the composite LDPE geomembrane factory price, it is necessary to add a layer of cement, mortar or concrete as a protective layer. This protective layer can not only protect the composite textured geomembrane for sale from external damage but also carry out water when the water level of the reservoir drops. Reverse osmosis.
Generally speaking, the protective layer has two layers. The first layer is made of cement mortar as a raw material. It is spread on the laid composite high quality textured geomembrane according to a certain ratio, and the thickness is about 3 cm. It is completed within two days after the laying of the composite environmental geomembrane manufacturers. The second protective layer is generally made of concrete prefabricated panels and has a thickness of about 6 cm. During the laying process, care should be taken to avoid the use of sharp tools and articles. It can be applied after the first protective layer is completed.
3.3 Construction requirements and precautions
Geomembrane is also divided into different types according to the composition materials. Compared with PE and PVC materials, PVC has higher tensile strength, longer service life, and better water barrier. The composite LDPE geomembrane for sale used in the anti-seepage of the storage tank needs to have the following requirements. The composite LDPE geomembrane manufacturers need to be completely free of cracks, and the LDPE geomembrane factory price and the geotextile can be directly bonded effectively, and at the same time, good impermeability is required. And also choose the appropriate composite high quality LDPE geomembrane according to the place of use.
In the anti-seepage structure of the storage tank, the composite wholesale LDPE geomembrane is the most important component of the anti-seepage effect, but the anti-seepage of the reservoir is a synergistic effect as a whole, and it can not achieve complete anti-seepage by relying on the composite textured geomembrane for sale alone. This also requires that in the construction of the project, not only the protection of the composite geomembrane itself but also the quality of the bottom support layer and the protective layer should be taken into account. When the high quality textured geomembrane and the geotextile are welded, the bonding of the composite LDPE geomembrane for sale is ensured. Quality, generally using hot-melt welding method, pay attention to the proper welding speed, and the size and fit between the LDPE geomembrane factory price and the geotextiles on both sides. The quality of the membrane itself, as well as the quality of the weld, directly determines the degree of impermeability of the entire reservoir.
Before and after the laying of the composite high quality textured geomembrane, each stage requires the materials and processes used to carry out strict quality inspection and supervises the construction personnel to operate in strict accordance with the construction requirements, so as to ensure the complete and effective anti-seepage structure of the reservoir.
4. There is a problem
Although the raw materials and materials used in the composite high quality LDPE geomembrane are relatively mature, there are still many problems in the specific construction, which affect the use effect and anti-seepage function. In the use of water conservancy projects, especially in the use of water storage tanks, leakage resistance often occurs, and the proportion of problems is very high, almost 100%. The impermeability of the composite environmental geomembrane manufacturers is destroyed, which not only causes waste of water resources but also may cause the reservoir to collapse, causing damage to the surrounding ecological environment and threatening the lives and property of the people.
This problem is so common and there are many reasons. Through the analysis of the existing hydraulic engineering anti-seepage technology, it is found that the main causes of the problems are as follows.
4.1 The production technology of PE and PVC materials is unstable, which leads to the quality of the composite textured geomembrane for sale itself, but the quality of the membrane itself can directly affect the overall anti-seepage effect of the project;
4.2 Due to the non-standard construction system and requirements, in the construction process of composite LDPE geomembrane for sale, the high quality textured geomembrane is often damaged by some sharp objects, or the high quality textured geomembrane and geotextile are not qualified due to the quality or the specifications of the membrane are not suitable. The bonding is not tight, or the high quality textured geomembrane and the geotextile are not fixed, causing the composite LDPE geomembrane factory price to collapse and the like;
4.3 The foundation surface and cushion of the reservoir are not flat or the composite wholesale LDPE geomembrane connected to it is damaged and damaged due to changes in the conditions. Therefore, before the construction, first, check the local geological conditions, and make corresponding treatment according to the actual situation to prevent such occurrences.
4.4 As the overall quality and technical level of engineering construction personnel in China need to be improved, the rupture of composite high quality textured geomembrane is often caused during the laying process due to the operation problems of the construction personnel, thus affecting the anti-seepage performance of the composite textured geomembrane for sale.
4.5 Connections with buildings outside the reservoir, such as toe piers, are not appropriate, resulting in reduced water resistance, and sometimes even more serious consequences, such as danger.
In general, China’s current anti-seepage technology and the production and laying technology of composite LDPE geomembrane manufacturers have yet to be further improved. In the construction process of the reservoir anti-seepage project, each link must be strictly controlled, which is the decisive factor for the entire water conservancy project to achieve the purpose of seepage prevention.
As a kind of polymer chemical material, composite high quality LDPE geomembrane has anti-seepage characteristics, which has been widely used in the anti-seepage engineering of reservoirs. However, some problems in its construction have caused its anti-seepage effect in water conservancy projects to be affected. Through the analysis of the above problems, it is concluded that in the construction of the reservoir anti-seepage project, the quality of the high quality textured geomembrane should be strictly controlled, and the construction methods and precautions should be strictly required to improve the construction quality and give full play. The advantages of composite high quality aquaculture geomembrane ensure the impervious performance of the reservoir.