anti-leakage technology of tunnel [Abstract] tunnel waterproofing,abercrombie düsseldorf, in addition to construction and technical factors, but also to strengthen the management, the only way to guarantee period, the highest quality project. In this paper, tunnel seepage water,hollister frankfurt, analysis of a variety of reasons, put forward a row, anti-,hollister wijnegem, row, cut the principle of combining block, set the tunnel seepage water control measures and methods.  [Key words] tunnel anti-leakage technology factors on Maki tunnel in the national trunk road in Guizhou Province from Shanghai to Ruili shengjing Zhenning to separate the upper and lower off the highway in a tunnel, the largest underground about 140 meters depth, length 805 meters left and right cable length 773 m, imports for the curved side wall Portal, Portal for the step-export, mainly of Quaternary groundwater types loose layer of pore water, bedrock fracture porosity water and karst water. The waterproof design of the tunnel: the initial support and the second between the laying of the lining layer of EVA / ECB anti-channeling co-extruded composite waterproof layer, two lining using waterproof concrete not less than the S6. Drainage design: the tunnel excavation, the rock surface Ω-shaped spring ring to drain laid to lead to leakage of water surrounding the base row of vertical pipes, the initial support and waterproof layer every 10 meters to set a ring to soft water pipe,hollister milano, and side walls connected to the bottom of the vertical drain, and then through the horizontal water pipe, the water discharge hole into the side ditch. Through the tunnel construction, the author On some of his own knowledge with peers to explore tunnel-leakage technology. One cause of water leakage caused by tunnel seepage water many reasons for the following reasons: 1. Design reasons (1) For some reason, the tunnel design ravine or off with a broken belt and not be anti-drainage treatment, a large number of surface water supplies underground, eventually leading to the tunnel leakage; (2) does not deal with unstable ground caused by uneven settlement of foundation,hollister carugate, resulting in structural joints or fill puzzle gap,hollister, resulting in leakage; (3) removal time too early, or too much pressure over the lining surrounding the body of the design load, etc.,ralph lauren, can make the lining of internal stress caused more than its destruction gap and seam strength. 2. Construction because (1) there is no concrete drainage by grading design and construction, where the ground water pressure, due to impermeability grade is lower than the corresponding pressure to water leakage. (2) tamping the concrete is not dense, the formation of cell, and thus more local leakage. In the hardening process of concrete,ralph lauren sverige, due to excess water (water from the slide is not the role of free water) evaporation, formed in the concrete capillary permeability of the open road, especially the concrete mixture in the process of settling the water pressed against the precipitation of part of the preparation surface, part of the aggregate particles together in the form above permeable tube. (3) concrete lining material with debris, after the formation of cracks or holes decay. (4) the pouring of concrete work of untreated or inadequately treated,hollister, resulting in the leakage gaps with strictly. (5) first arch the back wall or the construction of the first wall arch wall junction to fill arch lax, forming leakage. (6) does not allow holes formed by water will be required to deal with leakage channel. 3. Lining surrounding natural water PH value is exceeded on the concrete lining has some corrosion, common are carbonated, plus magnesium salts of corrosion resistance. Second, the tunnel waterproofing technology and construction measures  1. Concrete, waterproof concrete anti-seepage is a non-uniform material, from the microscopic point of view belongs to the porous body, the body contains many tiny pores of different sizes . These pores are divided into construction or because of different porosity (due to water, vibration caused by poor quality) and pore structure (due to improper because the ratio of the index cases). Waterproof concrete materials and construction from both the internal pores of concrete curb and reduce the generation of change pore characteristics (shape and size), plug the leakage path to improve the density of the concrete itself to achieve the purpose of waterproofing. It can be divided into water-proof concrete, concrete admixtures and waterproofing expansion of cement concrete three. (1) ordinary concrete, waterproof concrete ordinary water is adjusted with the ratio method to improve their density and impermeability of a concrete. To the preparation of a good quality waterproof concrete, be sure to follow the following technical requirements: a. water-cement ratio shall not exceed 0.6. B. cement concrete not less than 300kg / m 3 . C. sand 30 to 40% rate of tail, gray sand ratio 1:2 to 1:2.5. (2) waterproof concrete admixture of concrete waterproofing admixture rely on incorporation of a small amount of organic or inorganic additives to change the workability of concrete, increase its density and impermeability to meet the needs of project water A concrete. According to the different types of additives can be mixed into water reducer waterproof concrete, aerated concrete waterproofing agent, amine glycerol iron water-based waterproofing concrete and concrete. A. superplasticizer on cement waterproofing concrete have a strong dispersion, improve the workability of concrete. Therefore, after the incorporation of water-reducing agent, can greatly reduce the mixing water, thus reducing travel ions, can improve the concrete pore distribution, pore agents were significantly reduced total porosity,abercrombie hamburg, the density of concrete and impermeability to have improved. In use, the wood of calcium, total dosage of molasses was 0.2% by weight of cement 0.3%, more than 0.3%, the strength of the concrete will be used to reduce over-retarding agent. B. aerated concrete waterproofing agent triethanolamine c. water waterproof waterproof concrete d. Concrete ferric chloride ferric chloride is the main component of water repellent and ferric chloride iron, ferric chloride mixed with an appropriate amount of water repellent, can greatly improve the resistance of concrete permeability. Admixture of several commonly used in waterproof concrete impermeability best kind. Waterproofing agent ferric chloride dosage is generally 3% is appropriate, excessive dosage of steel corrosion, concrete setting time shrinkage and have an impact; dosage is too small, the effect was not significant, water-cement ratio should not be greater than 0.55, the mixing water should be less water-repellent moisture content, cement content not less than 310kg / m 3 , the slump of 3 ~ 5cm. Winter waterproof concrete configuration of ferric chloride, silicate cement should be used, in order to speed up the solidification can be an appropriate dosage of ferric chloride to improve water repellent but not more than 5%. 相关的主题文章： Information equipment and elimination _ of electro Technical cooperation in the development of Philip Morris cigarettes and tobacco Yang coal mine ground part of the preliminary design of the electrical substatio abercrombie madrid China's forest logging quota system problems and t 相关的主题文章： 浅谈长角辣椒高产栽培技术_ On%2520the%2520geotechnical%2520engineering%2520development%2520of%2520new 浅谈高寒阴湿区双低杂交油菜产业化发展的思路_ Medium and small cities in the operation of gas exchange ide Residential construction quality defects prevention measures