Reinforcement sleeve grouting connecting process suitable for fabricated building

Abstract

The invention provides a reinforcement sleeve grouting connecting process suitable for a fabricated building. A shearing wall is prefabricated, floor concrete is poured, a sleeve of a prefabricated shearing wall component is pre-buried in the upper part of the component, a plastic cover seals the top of the sleeve, and steel bars are reserved in the lower part of the component; and during hoistingof the component, the steel bars are inserted aligned with a sleeve of a component on the lower layer. Holes do not need to be reserved in the surfaces of the components, thus any face can face downwards for production, both forward and reverse driving processes can be carried out, the surface is flat and is subjected to press polish easily, the production difficulty of the components is lowered,the cost is saved, particularly by adopting the forward driving process, external facade decoration of the components has more selectivity, because no grouting hole or no exhaust hole needs to be reserved in the prefabricated shearing wall, the sleeve without reserved side holes can be adopted, and thus the cost of the sleeve is lowered; and the sleeve and the steel bars in the component can be connected in a threaded or fusion welded mode, the production difficulty is lowered, the cost is saved, and the construction and mounting difficulty of the shearing wall is lowered.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a steel bar sleeve grouting connection process suitable for prefabricated buildings. Background technique [0002] In recent years, as the country vigorously promotes prefabricated buildings, more and more projects have begun to adopt integral concrete structure construction technology, and the assembly of vertical prefabricated components requires grouting sleeve devices with relatively high strength and safety to complete the upper and lower parts. connections between components. At present, the vertical component connection of the domestic prefabricated integral concrete structure mainly adopts the steel sleeve grouting connection technology. This technology refers to inserting the ribbed steel bar into the grouting sleeve whose inner cavity is a concave-convex surface, pouring special high-strength cement-based grouting material into the gap between the sleeve ...

AI Technical Summary

Problems solved by technology

However, after the construction is completed, it is difficult to detect the fullness of the grouting in the sleeve, which makes it difficult to guarantee the construction quality

In addition, this process still has some shortcomings in component production and on-site installation and operation. After on-site research, there are still the following problems that can be optimized: (1) Due to the need to reserve grouting holes, during the component production process, in the wall The upward surface requires a lot of intubation tubes, which increases the difficulty of production operations and the leveling of the component surface is also very difficult

(2) In order to keep these grouting holes, the inner thread holes must be opened on the sleeve, which not only weakens the strength of the sleeve and requires a larger wall thickness, but also increases the processing difficulty of the sleeve, resulting in an increase in the cost of the sleeve

(3) The increase in the difficulty of component production leads to an increase in component costs

(4) If the external wall insulation is combined with the wall body (sandwich), it can only be produced by the "reversed process" method, and the "frontal process" production method cannot be used, which limits the flexibility of the treatment form of the external wall decorative surface Application, such as: decorative effects such as mushroom stones, cultural stones, colored bombs, etc.

(5) During the installation process, in order to ensure the accuracy of the reserved interspersed steel bars, special attention must be paid to the accuracy of the steel bar positions when pouring the floor slab concrete. Limit formwork should be used to ensure the position of the steel bars. Once the steel bars deviate, the consequences will be serious

(6) When the sleeve is grouted, the fluidity of the slurry is very large, and the operation is difficult. It is difficult to guarantee that it can be filled, and the fullness cannot be checked. It depends on the responsibility and technical proficiency of the personnel, and the quality will vary. A certain degree of discreteness, once the quantity of grouting operations is large, it is difficult to guarantee that there will be no quality problems

Images