Assembled concrete beam slab tongue-and-groove connection method

Abstract

The invention discloses an assembled concrete beam slab tongue-and-groove connection method. Prefabricated concrete beam slabs are connected in an end-to-end manner, trapezoidal splicing edge teeth of slabs A of the prefabricated concrete beam slabs correspond to trapezoidal splicing edge grooves of slabs B, and the slabs A and the slabs B are structurally connected in a tenon-and-mortise mode. Gaps among prefabricated concrete beams and prefabricated concrete floor slabs are plugged by sealing materials such as mortar, foamed polyethylene rods and building waterproof glue. The assembled concrete beam slab tongue-and-groove connection method has the advantages that dry construction is adopted in the connection mode, construction is simplified, connection is reliable, integrality is good, seismic resistance is excellent, rigidity is remarkably improved, and the prefabricated concrete beam slabs are matched in the tenon-and-mortise mode to form an elastic frame.

Description

technical field [0001] The invention relates to the field of building energy-saving walls, in particular to a tongue-and-groove connection method for assembled concrete beams and slabs. Background technique [0002] Prefabricated concrete buildings refer to factory-produced concrete prefabricated components. Concrete structure housing buildings designed and constructed through on-site assembly. The assembly methods of components generally include on-site post-casting laminated layer concrete, steel bar anchoring and post-casting concrete connection, etc. The steel bar connection can be connected by sleeve grouting connection, welding, mechanical connection and lap connection of reserved holes. [0003] Prefabricated concrete structure is one of the important directions for the development of my country's building structure. It is conducive to the development of my country's building industrialization, improving production efficiency and saving energy, developing green and e...

AI Technical Summary

Problems solved by technology

For example, the position accuracy of the reserved holes is relatively high. This is because the size and position of the prefabricated concrete buildings need to be as accurate as possible when reserving the holes of the embedded parts. Because of the factory production, the size of the prefabricated components has been fixed. If the size of the reserved holes is too small, the prefabricated components will not be able to be installed. If the size of the reserved holes is too large, it will cause the phenomenon of large joints

If the difference is too large, it is necessary to re-groove and open holes, which will increase the difficulty of construction and even affect the structure; the gap at the bottom of the prefabricated concrete slab is in a figure-eight shape, and it may be easy to fall off after pointing. After actual observation on site, the prefabricated slab is large and bottom For the small inverted figure-eight slab, the seam formed between the two slabs is in the shape of a figure-eight. Therefore, even though the joints are jointed with anti-crack mortar, it is still easy to fall off and hurt people. Therefore, it is recommended to put the precast slab If it is changed to a regular eight-shaped slab with a small top and a large bottom, then the seam between the two slabs will be in an inverted splayed shape, and the slab seam and the laminated slab can be cast together; the assembled concrete slab has no water-stop rubber strips, The current prefabricated concrete slabs are generally connected by bolts, but if the joints are drilled and bolts are used, the later use will greatly cause leakage

[0006] In addition, although the prefabricated concrete floor has a large bearing capacity and in-plane rigidity, it still has the disadvantages of the traditional cast-in-place floor such as heavy weight, complicated process, and large demand for resources and labor. Self-weight is not conducive to earthquake resistance and standardized production of components, it is not suitable for the development of housing industrialization, and cracks are prone to occur at the seams of spliced ​​panels

In addition, there are disadvantages such as poor seismic performance, poor waterproof effect, and limited modulus. However, the current prefabricated concrete floor is constructed by splicing and connecting high-strength bolts, resulting in the mechanical performance of the fully prefabricated floor.

At present, the research on prefabricated structures in our country is not perfect, lacks corresponding norms and technical basis, and there are still uncertain factors in the reliability of mechanical connections

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