High-pressure grouting leaking stoppage method for settlement joint of building

Abstract

The invention provides a high-pressure grouting leaking stoppage method for a settlement joint of a building. According to the high-pressure grouting leaking stoppage method for the settlement joint of the building, high complementary between polyurethane modified epoxy resin grouting fluid and acrylamide grouting fluid on core properties is utilized, outer side protection is formed by making use of the polyurethane modified epoxy resin grouting fluid, inner side expansion filler is formed by making use of the acrylamide grouting fluid based on the outer side protection, so that advantages are used to complement to each other, strengths are combined together, advantages are enhanced and disadvantages are avoided, rapid grouting leaking stoppage of the settlement joint of the building is achieved, the leaking stoppage quality is improved, the endurance of leaking stoppage is improved without damaging the original structure and functions of the building, and requirements for development of buildings in the present stage are satisfied.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a high-pressure grouting plugging method for building settlement joints. Background technique [0002] Settlement joints refer to vertical joints set up to prevent building damage caused by uneven settlement of various parts of the building. When the height, load and structural form of the adjacent parts of the house are very different and the foundation is weak, the house may have uneven settlement, resulting in cracks in some weak parts. Set settlement joints at turning points, height changes, loads, foundation compressibility and foundation treatment methods are obviously different. The settlement joint divides the building into several independent units that can settle freely. The significant difference between the settlement joint and the expansion joint is that the settlement joint runs through from the foundation of the building to the roof, and the width of...

AI Technical Summary

Problems solved by technology

[0004] 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

[0005] 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

[0006] 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, certain corrosion to steel structure