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Waterproof construction of a high-pressure grouting program, high pressure grouting technology features 1, high pressure grouting waterproof plugging new technology is the use of brief high pressure grouting plugging high-pressure power machinery, water-soluble polyurethane chemical grouting material into the concrete cracks, when the slurry is met the concrete cracks in the water will quickly dispersing, emulsifying, expansion, consolidation, consolidation so elastomers filled with concrete all the cracks, will completely block the water flow out of the concrete structure in order to achieve the purpose of sealing plugging. High pressure grouting plugging technology is internationally advanced level high pressure airless water infusion of new technology, is a new technology developed water-soluble materials used grout. 2, high pressure grouting plugging principle: soluble polyurethane chemical grouting material is made from an excess of polyvalent isocyanate and polyol preformed oligomeric amino acid containing free NCO groups of the prepolymer. Commonly used polyisocyanate has three kinds of TDI, MDI, PAPI and the like. Polyether polyols using its functional groups and molecular weights may have several. After the slurry is poured concrete cracks, and leakage of water to meet the chemical reaction and emit carbon dioxide, and the formation of urea derivatives. So as to achieve the purpose of seepage. Soluble polyurethane chemical grouting material is a bottom viscosity, one-component polyurethane synthetic polymer materials, form of slurry, it has water to produce cross-linking reaction, foaming characteristics to generate multi-mesh closed elastomer. When it is injected at high pressure into the cracks in the concrete structure will be extended until all gaps (including imperceptible to the naked eye) filled, after water (water) along with the crosslinking reaction, release large amounts of carbon dioxide gas, secondary osmotic pressure, high pressure thrust with two times osmotic pressure will push the elastomer and filled all the gaps, to stanch purpose. Visible soluble polyurethane chemical grouting material is the best kind of plugging material properties, the material can not be treated by conventional leakage, high pressure grouting plugging Plugging a successful technology. 3, high pressure grouting plugging mechanism ① cracks form a chemical link. ② pore surface to form a high strength bolt. ③ fill all cracks under high pressure to push. 4. The use of high-pressure grouting plugging technical characteristics of the finished height of ①; ② simple operation; ③ four seasons construction; ④ toxic pollution; ⑤ reasonable cost. Second, the construction of the main application materials: 1, Material Introduction The appearance of the product is light yellow to amber transparent liquid, which is made of polyurethane prepolymer with a variety of additives are blended in a single group. Plugging of the filling material points, a fast and efficient but both plugging seepage consolidation reinforced polymer elastic material. Can be applied to a variety of projects from the Water Seepage reinforcement effect. 2, material characteristics ① The material has good hydrophilic, can react with water, while generating CO2 gas, and against the current along the runoff channel penetration and diffusion, and concrete, sand, soil and other consolidation around rapid hardening to form consolidation impervious layer, has been widely used to block large pressure and prevent Foundation gushing water and water infiltration. ② The material and concrete and soil particles bond force, elastic consolidation can obtain high-strength body, and therefore able to fully adapt to the foundation or other primary deformation, it is not easy to find crack, crumble and get early strong reinforcement; ③ in an aqueous slurry of the structure will not be broken up, in the reaction process, because the gas diffusion zone increases rapidly the effective consolidation obtained larger than many other types of chemical grout consolidated mass; ④ according to different engineering the need to adjust the viscosity of the liquid filling, for concrete projects, such as small cracks after grouting tunnel, dam, etc. can quickly penetrate into the slurry to form a strong bond, good permeability, high-intensity consolidation of body ; ⑤ slurry curing speed can be adjusted according to the construction; single-component filling device ⑥ construction, easy to clean, simple and easy process, lower overall costs; ⑦ consolidation body immersed in water is harmless, non-toxic, pollution. Seepage treatment options: Ministry for the above analysis, the decision to take part on the first plugging leakage control; Then, backwater tests to examine the effect of plugging governance. If you return later in the construction joints and nearby also found serious cases of water seepage started embedded in the structure of the construction process of grouting pipe grouting. Leak treatment principle is to reduce water leakage area, will focus on water leakage point or points, reducing pressure on other parts of the seepage, plugging ensure smooth repair work. To reduce the leakage area, the first to do a good job of diversion. Principle is that the big water leak smaller leak, leak transition point line leak, leak becomes face hole leak. Taking into account the rainfall stopped after 25m above the hydrodynamic pressure, properly handle the issue of water leakage, must do: choose the right materials, the right way, and construction work to ensure foolproof. Based on years of experience in the construction of similar projects, combined with the actual situation in the field of water leakage, water leakage think the focus in construction joint seepage treatment, treatment methods should be used in conjunction rigid, that is done outside the rigid structure construction joints reinforced plaster Construction in the joints do grouting treatment. (A) material selection: 1800 # superfine cement. 2, interface agent, and other additives. 3, HUG-13 concrete capillary crystalline waterproofing agent. 4,500 # of cement and sand. 5, note slurry. (B) the main construction method: 1, construction joints (longitudinal, vertical) parts: vertical construction joints is a crack penetrated, if only parts of seepage water treatment, until the stop precipitation, pressure increases, will cause The site does not leak occurred early leakage of water, (from the north wall of the test section deal with the situation has proved such a possibility). Therefore recommends: In all four horizontal construction joints do waterproofing. 1.1 The main construction method: structural reinforcement Plastering rigid waterproof layer; diversion channel presets down tube, grouting. 1.1.1 construction sequence: V-groove chisel to clean grassroots → Preferences → diversion channel plugging → → → Plastering structural reinforcement grouting. 1.1.1.1 chisel V-groove: construction joints along the construction joints with a chisel hewn vertical depth of the V-groove 10-15㎝, V-groove opening width 15-20㎝. While the V-groove opening at the top and bottom of each 20 cm with a chisel, ax, wire brush surface roughening, and scrub with a brush. 1.1.1.2 clean up the grassroots: primary treatment is very important, it is guaranteed waterproof layer and grass-roots firmly bonded, not hollowing and dense key, so you must do, which includes grassroots cleaning, watering, make equal work shall be such that the primary surface clean, smooth, solid rough, in order to facilitate a strong bond with the water. Special requirements of the V-grooves and crevices construction sand and other debris cleaned, if necessary flushing or blowing with high pressure water or high pressure air. 1.1.1.3 Preset diversion channels: at the cleaned well V-bottom groove close to the construction joints, placing foam strips water off the assembly line, the amount of the gap size can be set according to the local 1-3 root length 1-1.5m the longest not exceed 2m. 1.1.1.4 Plugging: Direct rapid plugging method: generally less pressure (2N below), is not the case under the hole using. According to the specific circumstances of leakage of water to leak point as the center tick groove (diameter × depth of 1cm × 2cm, 2cm × 3cm, 3cm × 5cm), general seepage tick pores with a diameter of 1cm hole, groove wall and operation base surface must be vertical, not tick into the next big small slot. Rinse with water tank, then the sealing agent twisted into the slot near the cone, to be plugging pill starts to solidify, quickly forced to plug into its slot, so plugging pill and groove walls closely. At the same time slot around the dry, sprinkle dry cement, check for leakages. After plugging leakages when strict no, then wipe the surface of the sealing elements pill each layer of ash and cement and mortar surface swept hair, until there is a certain strength of mortar (a summer day and night, winter 2 to 3 days and nights), and then in on a waterproof layer. Blockage found lax, should the original mortar blockage removed, re-blockage by the above method. With particular emphasis on steel processing leakage gap, we must once blocked. Fast direct plugging method: This method is used to pressure the smaller slow, fast and rapids water leakage governance. When operating along the V-shaped cracks tick worse 10-15㎝ deep, 60 mm wide and 20 to Tongliao basement plugging unit