A high-pressure grouting plugging method for basement or underground garage roof

Abstract

The invention provides a high pressure grouting leakage plugging method for a basement or underground garage top plate. The quite high complementarity between polyurethane-modified epoxy resin type grout and acrylamide type grout in the aspect of key performance is utilized, the polyurethane-modified epoxy resin type grout is used for roughly plugging leakage, and on this basis, the acrylamide type grout is used for finely plugging leakage, so that complementary advantages are used, powerful combination is achieved, advantages are enhanced, disadvantages are avoided, rapid grouting leakage plugging for the basement or underground garage top plate is achieved, leakage plugging quality is improved, leakage plugging durability is improved, the original structure and function of a building are not damaged, and building development requirements in the present stage are met.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a high-pressure grouting plugging method for the roof of a basement or an underground garage. Background technique [0002] The leakage of water from the roof of the basement of the residential building reduces the service life of the building and seriously affects the normal use of the basement. Patent CN 105369833A relates to a basement roof leakage grouting maintenance method, but the traditional grouting method is used for plugging, and the grouting pressure is 0.3Mpa due to the performance limitation of the grouting equipment. The leaking water in the basement generally has a certain pressure, especially the open water leakage on the roof of the basement. The cracks are under the pressure of the confined water, and it is impossible to pour the plugging material at all. Under this pressure, even if the poured liquid is an oily material, such as polyurethane or ...

AI Technical Summary

Problems solved by technology

[0005] Although the polyurethane foam grouting plugging material has the characteristics of instant expansion and water sealing during construction, it also has the disadvantage that there may be gaps in the foam itself, and it will shrink in the future, and it often leaks again after 3 months of construction. , can not completely solve the leakage problem of the roof of the underground garage

[0006] Polyurethane modified epoxy resin grout is a new type of adhesive, which combines the advantages of polyurethane resin and epoxy resin: the compressive strength after solidification can reach more than 50MPa, and has certain elasticity; but the initial viscosity of the slurry is large, The permeability coefficient is small, and it is difficult to be injected into deep fractures at the same time

[0007] However, the acrylamide grouting fluid has a short gel time, low initial viscosity of the grout, and can penetrate into the fine cracks or pores of the concrete. The gel has great elasticity and is impermeable after injection, but the grout needs to be treated to prevent dry cracking after solidification, and low compressive strength