The effect of geotextile in water conservancy, railway and reservoir engineering

The application plan of geotextile is very extensive, and geotextile can be seen in various projects. Let me introduce the effects of geotextiles in water conservancy projects and the effects of geotextiles in railway construction for us from Fujian. I hope it can help us. The application of geotextiles in water conservancy projects: 　　1. Prevent the loss of water and soil. The loss of water and soil will affect the land environment and its use. It is also one of the causes of water pollution. Therefore, in order to reduce and prevent soil and water loss, the use of geotextiles is also a comparison. Indispensable technical engineering. It is said that geotextile is a technology developed to provide protection for the loss of water and soil, and it can deal with unlucky environments.　　2. Adhere to the balance of water and soil. 　　 Geotextile has the functions of barrier, drainage, reinforcement, filtration, seepage prevention and corrosion prevention. The geotextile can use its own structure to form a drainage layer, collect the moisture in the soil in the geotextile, and then slowly drain it along the surface of the geotextile; and the geotextile also has excellent water permeability and filtering functions, The water in the soil is drained through the apertures in the geotextile, which can prevent the loss of water and soil particles, so as to prevent cavitation and maintain the water and soil balance.　　The effect of geotextiles in railway construction　　　　geotextiles have a great dedication in road construction, and have exerted great effects on highways, airport roads and railways. Let's talk about the effect of geotextile in railway construction. 1. Geotextiles used on railways must be qualified. According to the on-site recognition, the quality requirement should not be less than 200g/㎡. The inspection certificate shows that the geotextiles must be fed into the warehouse and must not be exposed to the open air. If the geotextiles are stored over It is not suitable for 6 months. 2. The geotextile itself has excellent voids, excellent adhesion and separation effect, and because the geotextile has certain tear resistance, impermeable membrane force and excellent deformation adaptability, it also has excellent flat drainage ability. The soft multi-void has an excellent coefficient of friction. It can improve the adhesion of soil particles. It prevents the fine particles from being lost and removes the remaining moisture by preventing the particles from flowing. The surface is soft and the protection is strong. Therefore, filament geotextile has been widely used in railway engineering.　　The development of society, geotextile alone can no longer meet people's needs, so more varieties of geotextiles are emerging like mountains and plains, including impervious geotextiles. The impermeable geotextile is known by its name. Its main function is to prevent seepage, and its anti-seepage function is indeed very good, so it is widely used in many projects with anti-seepage requirements.　　The application of geotextiles in reservoirs　　Because of their good anti-seepage function, geotextiles are often used in the anti-seepage system of water conservancy projects, including reservoirs.　　The geotextiles chosen for the anti-seepage of the reservoir are mostly geotextiles made of polyethylene. Because such geotextiles are soft in texture, strong in aging resistance, not easy to crack, and have a long service life. As for the parameter value of the geotextile used, the thickness is generally between 0.8mm and 1.2mm, and the width is between 1.5 and 2 meters. When laying, the plan is to lay from the foot of the dam to the horizontal surface. The purpose is to better prevent seepage.　　 Construction technology of geotextile 　　 The construction technology of geotextile has a great relationship with the construction quality, and it often determines the quality of the construction project and the service life. So how should the geotextile be carried out during construction? 　　1. The cushion layer should be flat: clear away the debris and weeds in time, clean up the uneven slope surface, and clean up the silt at the bottom of the dam in time. The guarantor will not get too serious when standing up. 2. The splicing of geotextiles should be tight: there are generally three types of splicing of geotextiles: lap, welding, and bonding. No matter which splicing method is selected, the local one should be paid attention to to prevent leakage and affect the anti-seepage effect. . 3. The laying of geotextile: the laying direction should be from bottom to top, and the tightness should not be too close to prevent the geotextile from cracking due to the effect of pressure when pressing the soil, and the speed of laying and the speed of overlaying the protective layer should be basic Keep it flat to prevent long-term exposure of the geotextile to the sun and accelerate the aging of the geotextile.　　4. Filling of the protective layer: The protective layer cannot contain weeds and other substances, but it contains certain moisture, and the thickness of the laying should not be higher than 30 cm. How the protective layer is filled has a great relationship with the anti-seepage of geotextile.