Three-dimensional composite drainage net is a commonly used drainage material in major projects. So, what are its applications in tailings dams?
1. Characteristics of three-dimensional composite drainage net
Three-dimensional composite drainage net is a three-dimensional mesh structure material made of high-strength polymers such as HDPE or PP. It consists of a three-dimensional core material sandwiched between two layers of geotextiles. Therefore, it has the function of quickly guiding water and filtering sediment, and can prevent blockage. Its mesh core is formed by three ribs arranged at a certain spacing and angle. The middle rib is rigid and can form a rectangular drainage channel, while the ribs arranged crosswise above and below play a supporting role, which can prevent the geotextile from being embedded in the drainage channel and ensure stable drainage performance. The three-dimensional composite drainage net also has extremely high tensile strength and compressive strength, can withstand long-term high pressure loads, is corrosion-resistant, acid-resistant, and has a long service life.
2. Advantages of application in tailings dams
1. Improve drainage efficiency: During the construction of tailings dams, a large amount of seepage will be generated. The three-dimensional composite drainage net can quickly guide the seepage water out of the dam body, reduce the water pressure inside the dam body, and improve the stability of the dam body.
2. Enhance the strength of the dam body: The high strength characteristics of the three-dimensional composite drainage net allow it to play a reinforcing role in the dam body, enhancing the overall strength and deformation resistance of the dam body. Its three-dimensional structure can also block capillary water, prevent water from migrating inside the dam body, and consolidate the dam body structure.
3. Extend the service life: The corrosion resistance and acid and alkali resistance of the three-dimensional composite drainage net allow it to work stably for a long time in a complex environment such as the tailings dam, which can maintain the cost and extend the service life of the dam body.
4. Environmental protection and energy saving: Compared with the traditional sand and gravel layer drainage system, the three-dimensional composite drainage net is easy to construct, shortens the construction period, reduces the cost, and the material can be recycled, which is in line with the green and low-carbon development concept.
III. Construction points
1. Construction preparation: Clean the construction site to ensure that there is no floating soil, stones and sharp objects, creating good conditions for the laying of the drainage net.
2. Laying and connection: According to the design requirements, lay the three-dimensional composite drainage net flat on the site. When the laying length exceeds the single-piece drainage net, nylon buckles or special connectors should be used to connect to ensure that the connection is firm and there is no leakage.
3. Protection measures: Lay a protective layer above the drainage net to prevent mechanical damage and man-made damage during construction. It can also ensure that the drainage net is closely integrated with the surrounding soil to form an effective drainage system.
4. Quality inspection: After the construction is completed, the drainage performance and connection firmness of the drainage net are comprehensively inspected to ensure that they meet the design requirements.
As can be seen from the above, the use of three-dimensional composite drainage nets in tailings dams can not only improve the drainage efficiency and stability of the dam body, but also extend the service life of the dam body and reduce maintenance costs.
Post time: Jul-04-2025
