CN113846800B - A connection structure and connection method of prefabricated steel horizontal beams and prefabricated floor slabs - Google Patents

Abstract

The invention discloses a connecting structure and a connecting method for a prefabricated profile steel horizontal beam and a prefabricated floor slab, and relates to the field of civil building structures. According to the invention, the embedded tie rods are installed on the horizontal beam, so that the connection between the horizontal beam and the upper prefabricated shear wall, the lower prefabricated shear wall and the horizontal prefabricated composite floor slab can directly penetrate through the embedded tie rods on the horizontal beam and then be screwed down by the nuts in the installation process of the horizontal beam, the on-site wet connection can be avoided, the construction speed is high, the replaceability is realized, the installation method is simple and easy, the quality is easy to guarantee, the disassembly is convenient, and the repeated reutilization of the horizontal beam is facilitated.

Description

A connection structure and connection method of prefabricated steel horizontal beams and prefabricated floor slabs

technical field

The invention relates to the field of civil and architectural structures, in particular to a prefabricated steel horizontal beam, a prefabricated floor connection structure and a connection method.

Background technique

With the advent of the era of building prefabrication and assembly integration, efficient, simple and green construction concepts have become the unlimited pursuit of the construction industry. The prefabricated assembly shear wall is based on the structural system of the cast-in-place concrete shear wall, and the horizontal beam of the shear wall structural system is used as the structural unit, and the overall prefabricated assembly is formed by segmental prefabrication of the shear wall and on-site assembly connection. Shear wall structure. In the shear wall structure system, the horizontal beam is used as the connecting member between the prefabricated shear wall on the upper and lower floors and the left and right horizontal floors, and plays the role of the core of the connection and the core of the bearing, and is used to coordinate the force transmission between the stressed components of each part And deformation, as the core component of the prefabricated component, is the key to determine the overall bearing performance of the prefabricated prefabricated shear wall structure system.

For prefabricated concrete components used in prefabricated building structures, traditional reinforced concrete horizontal beams are mostly made of bundled reinforcement cages and concrete cast-in-place, and the quality of reinforcement bundles is often affected by welders’ welding techniques. If the joints are not welded properly Well, it will seriously affect the construction speed, reduce the construction quality, and easily cause environmental damage and waste of resources; at the same time, because the existing cross-sections of the beams are special-shaped concrete cross-sections, it is difficult to guarantee the quality of the poured concrete, and the construction period is long and the cost is high. Large errors in molding can easily cause difficulty in connection with other components and affect the overall safety and reliability of the structure.

The patent application with the publication number CN107327019A provides a formwork-free cast-in-place reinforced concrete ring beam structure and its construction method. It is arranged between two structural columns with ring beams on the structural columns, including prefabricated standard modules, and multiple prefabricated standard modules. After the modules are combined and connected, they are built in the ring beam on the top of the wall, and the concrete for the ring beam and the structural column below the top of the ring beam is poured. After the concrete is poured, the prefabricated standard module forms a whole with the ring beam. The advantage of this patent application lies in its simple structure and strong operability. The combination of five modules can meet the construction requirements of various forms of ring beams and structural columns. It has the advantages of convenient use and fewer operators, and achieves the effect of reducing labor intensity; through The method of combining various prefabricated models realizes the construction of the formwork-free cast-in-place reinforced concrete ring beam structure. The construction method is simple and convenient. Compared with the existing construction methods, it has the advantages of high construction efficiency and small safety hazards. However, the manufacture of ring beams in this patent application is still mainly wet work, which makes it difficult to maximize the advantages of prefabricated building technology in saving resources, protecting the environment and reducing pollution, and it is difficult to achieve rapid assembly; so how to realize the beam The reference connection of the board and the realization of fast and high-quality installation are still the focus of the research and engineering application of the fabricated structure.

Based on this, in order to improve the installation efficiency and the overall assembly quality of the house, it is urgent to develop a construction method for prefabricated steel horizontal beams, prefabricated floor slab connection structures and prefabricated floor slab connections, so as to carry out targeted development and design based on the force characteristics of the horizontal beams. Faster and more effective connection with prefabricated reinforced concrete floor slabs, prefabricated shear walls and other components can efficiently carry out high-quality assembly between components.

Contents of the invention

The purpose of the present invention is to provide a prefabricated steel horizontal beam, prefabricated floor connection structure and connection method, based on the force characteristics of the horizontal beam, to achieve more effective connection with prefabricated reinforced concrete components, and to efficiently perform high-quality assembly between components.

In order to achieve the purpose of the present invention, the technical solution adopted is: a prefabricated profiled steel horizontal beam, including a horizontal beam with a "convex" cross-section, the horizontal beam is a composite component of profiled steel, and both sides of the horizontal beam have limiting platforms, There are connecting pieces installed on the top surface of the beam, the bottom surface of the lying beam and the two limiting platforms, and there are at least two connecting pieces on the top surface of the lying beam, the bottom surface of the lying beam and the two limiting platforms, so as to ensure Reliable under force and easy to place.

Further, the lying beam includes a square steel pipe, a small-section channel steel and two high-section channel steels, the two high-section channel steels are arranged opposite to each other on the left and right, and the square steel pipes are jointly installed on the upper flanges of the two high-section channel steels Above, the small-section channel steel is installed between the lower flanges of two high-section channel steels, and the opening of the small-section steel channel is outward.

Further, unequal channel steel is installed on the two limiting platforms, the long flange of the unequal channel steel is fixed to the square steel pipe, and the web of the unequal channel steel is fixed to the high section channel steel.

Further, the unequal channel steel also has an obliquely welded steel plate connecting the web of the unequal channel steel and the short flange of the unequal channel steel.

Further, there is also a fine stone concrete pouring layer inside the unequal channel steel.

Further, the long flange of the unequal channel steel is higher than the square steel pipe.

Further, the connecting piece on the bottom surface of the lying beam is located in the small-section channel steel.

Further, there are two oblique stiffening plates inside the lying beam, and the upper ends of the two oblique stiffening plates respectively support the two limiting platforms.

Further, the connecting piece is a pre-embedded bolt rod, and the extension end of the pre-embedded bolt rod is threaded, which is convenient to be tightened and fixed by a nut later.

A prefabricated floor connection structure, including the above-mentioned horizontal beam, and also includes an upper prefabricated shear wall, a lower prefabricated shear wall and two horizontal prefabricated laminated floors, the upper prefabricated shear wall is fixed on the top of the horizontal beam The upper and lower prefabricated shear walls are fixed on the bottom surface of the lying beam, and the connection ends of the two horizontal prefabricated laminated floors are respectively lapped on the two limiting platforms to form a connection structure centered on the lying beam.

Further, notches are formed on the side walls of the upper prefabricated shear wall and the lower prefabricated shear wall, and the connectors extend into the notches and are locked and fixed.

A prefabricated floor connection method, positioning and installing the lower prefabricated shear wall, installing the above-mentioned horizontal beam on the lower prefabricated shear wall, fixing the upper prefabricated shear wall on the top surface, and superimposing the two horizontal prefabricated The connecting ends of the floor slabs are lapped on the two limiting platforms respectively, and are respectively connected with the upper prefabricated shear wall, the lower prefabricated shear wall and the Horizontal prefabricated laminated floor slabs are fixed.

Further, before the installation of the horizontal prefabricated laminated floor slab, fine stone concrete is poured on the limit platform to improve the connection between the floor slab and the horizontal beam, thereby improving the structural integrity and impermeability.

The beneficial effect of the present invention is,

1. By pre-embedding connectors on the horizontal beam, during the installation process of the horizontal beam, the connection between the horizontal beam and the upper prefabricated shear wall, the lower prefabricated shear wall, and the horizontal prefabricated laminated floor can directly use the connectors and The fast connection of matching locking parts can not only avoid on-site wet connection, it is green and environmentally friendly, the construction speed is fast, and it is replaceable. The installation method is simple and easy to disassemble, which increases the service life of the overall structure.

2. Compared with traditional reinforced concrete cast-in-place beams, the lying beams made of steel plates and section steel members have higher strength, lighter weight, better fire resistance, and better prefabrication. 100% recycling and reuse, fully meet the green environmental protection requirements of prefabricated buildings; at the same time, the horizontal beam has high rigidity, which can well coordinate the deformation of the upper prefabricated shear wall, the lower prefabricated shear wall, and the horizontal prefabricated laminated floor.

3. The horizontal beam is made of square steel pipe, small-section channel steel and two high-section channel steel, so that the bottom surface of the horizontal beam has a groove structure, and by installing unequal-side channel steel on the limiting platform, the The short flange of the equilateral channel steel forms a tenon structure, and by making the long flange of the unequal channel steel higher than the top surface of the square steel pipe, not only the upper prefabricated shear wall, the lower prefabricated shear wall, and the horizontal prefabricated The laminated floor slab can be installed in the way of snap-fitting, which has high quality in place, reduces the installation measures of components, and reduces the cost of the project. Since the opening of the unequal channel steel is upward, the horizontal prefabricated laminated floor slab is connected to the horizontal beam. , changed the seepage path of the traditional connection, can play a very good water-stop effect, and effectively avoid the problem of water leakage along the gap between the assembled components; at the same time, the use of unequal channel steel can effectively improve the stability of the horizontal beam itself, and the connection of the connectors It can effectively improve the connection reliability between the lying beam and the upper prefabricated shear wall, and the unequal channel steel is light and not easily deformed, easy to carry, hoist and transport, and convenient to connect and assemble.

4. By installing unequal channel steel, the gap between the short flange of the unequal channel steel and the long flange of the unequal channel steel can also be used as the concave-convex keyway at the joint between the horizontal beam and the horizontal prefabricated laminated plate, and By making the long flange of the unequal channel steel higher than the top surface of the square steel pipe and the bottom surface of the lying beam lower than the corresponding groove, it is convenient for the upper prefabricated shear wall, the lower prefabricated shear wall, and the horizontal prefabricated laminated floor At the same time, by pouring fine stone concrete into the unequal channel steel, the bonding strength between the horizontal beam and the horizontal prefabricated laminated floor is improved, and the connection between the horizontal prefabricated laminated floor and the horizontal beam is improved. of integrity.

5. The horizontal beam provided by the present invention is directly fabricated by welding square steel pipes, small-section channel steel, two high-section channel steels and unequal-side channel steels, etc., and the process is simple; the inside of the horizontal beam is a hollow structure, which is convenient for pipeline embedding , easy to replace, and can effectively solve the potential danger caused by the external installation and fixation of the pipeline and the technical and technological difficulties in the subsequent laying of open wires.

Description of drawings

The accompanying drawings illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, are included to provide a further understanding of the invention, and are incorporated in and constitute this specification. part of the manual.

Fig. 1 is the perspective view of the prefabricated section steel horizontal beam provided by the present invention;

Fig. 2 is the front view of the prefabricated steel horizontal beam provided by the present invention;

Fig. 3 is the structural diagram of unequal channel steel among Fig. 1;

Fig. 4 is an installation structure diagram of the upper prefabricated shear wall and the lower prefabricated shear wall in the prefabricated floor connection structure provided by the present invention;

Fig. 5 is a diagram of the installation structure of horizontal prefabricated laminated floors in the prefabricated floor connection structure provided by the present invention.

Marks and corresponding component names in the attached drawings:

1. Square steel pipe, 2. High section channel steel, 3. Unequal channel steel, 4. Small section channel steel, 5. Diagonal stiffening plate, 6. Connecting piece, 7. Limiting platform, 8. Upper side prefabrication Shear wall, 9. Lower prefabricated shear wall, 10. Notch, 11. Horizontal prefabricated laminated floor, 12. Fine stone concrete pouring layer, 13. Locking parts,

3-1, long flange, 3-2, web, 3-3, short flange, 3-4, obliquely welded steel plate.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific implementation manners described here are only used to explain relevant content, rather than to limit the present invention. In addition, it should be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

Example 1

As shown in Figure 1, Figure 2 and Figure 3, a prefabricated steel horizontal beam provided by the present invention has a "convex" cross section, that is, the width of the upper part of the horizontal beam is smaller than the width of the lower part of the horizontal beam, so that the horizontal beam There are two step surfaces on the beam, and the two step surfaces are the limit platform 7 of the lying beam. The limit platform 7 is mainly to facilitate the overlapping of the horizontal prefabricated laminated floor 11. It is symmetrically arranged relative to the central axis of the horizontal beam; at the same time, the horizontal beam is welded by steel composite components. Compared with the traditional reinforced concrete cast-in-place beam, it has high strength, light weight and good prefabrication, which solves the problem of large amount of wet work on site. problems, and steel materials can be 100% recycled, fully meeting the green environmental protection requirements of prefabricated buildings. The top surface of the lying beam, the bottom surface of the lying beam and the limit platform 7 are all equipped with a connecting piece 6, which is mainly used for the later lying beam and the upper prefabricated shear wall 8, the lower side prefabricated shear wall 9 or The connection of the horizontal prefabricated laminated floor slab 11, and the connectors 6 on the top surface of the lying beam, the bottom surface of the lying beam and the limiting platform 7 can be multiple, and the number of connecting parts 6 on the top surface of the lying beam, the bottom surface of the lying beam and the limiting platform 7 The two connectors 6 can be arranged at intervals along the axial direction, so that the connection between the upper prefabricated shear wall 8, the lower prefabricated shear wall 9 or the horizontal prefabricated laminated floor 11 and the horizontal beam is more stable in the later stage.

In some embodiments, the lying beam includes a square steel pipe 1, a small-section channel steel 4 and two high-section channel steels 2, the small-section channel steel 4 and the high-section channel steel 2 are both U-shaped, and the high-section channel steel 2 The model of the high-section channel steel 2 is 40#a, the rib width of the high-section channel steel 2 is 400mm, the thickness of the high-section channel steel 2 is 10.5mm, the model of the small-section channel steel 4 is 22b, and the rib plate width of the small-section channel steel 4 is 220mm, the rib width of the small-section channel steel 4 is 79mm, the thickness of the small-section channel steel 4 is 10mm, and the axis directions of the small-section channel steel 4, the high-section channel steel 2 and the square steel pipe 1 are consistent, and the high-section channel steel 2 The width direction is consistent with the vertical direction, the higher flange on the high-section channel steel 2 is the upper flange of the high-section channel steel 2, and the lower flange on the high-section channel steel 2 is the high-section channel The lower flange of steel 2, the width of the upper flange of high-section channel steel 2 is 100mm, the width of the lower flange of high-section channel steel 2 is 40mm, and the openings of two high-section channel steel 2 are arranged oppositely, and the two high-section The cross-section channel steel 2 is installed on opposite sides of the square steel pipe 1 respectively, and the upper flange of the high-section channel steel 2 is welded and fixed with the square steel pipe 1, so that after the high-section channel steel 2 and the square steel pipe 1 are welded and fixed, the high-section channel steel 2 The upper flange of the upper flange and the side wall of the square steel pipe 1 form a limit platform 7; at the same time, the lower ends of the two high-section channel steels 2 are flush, and the small-section channel steel 4 is installed between the two high-section channel steels 2, and The opening of the small-section channel steel 4 faces downward, and the flange of the small-section channel steel 4 is welded and fixed to the flange of the high-section channel steel 2 on the same side, so that the bottom surface of the lying beam has a groove structure, so that the bottom surface of the lying beam Form a structure that can be occluded with the prefabricated shear wall 9 on the lower side; at the same time, the width of the square steel pipe 1 is 200mm, the wall thickness of the square steel pipe 1 is 10.5mm, and the high-section channel steel 2, the small-section channel steel 4, and the square steel pipe 1 are filled with weld. The horizontal beam is formed by joint welding of the square steel pipe 1, the small-section channel steel 4 and two high-section channel steels 2, which not only makes the structure of the horizontal beam simpler, but also makes the forming of the horizontal beam more convenient.

In this embodiment, the two high-section channel steels 2 can also adopt channel steels with unequal flanges on both sides, that is, the width of the upper flange of the high-section channel steel 2 is greater than the width of the lower flange of the high-section channel steel 2, so that the two The upper flanges of the two high-section channel steels 2 can be directly welded and fixed, and then the square steel pipe 1 can be fixed on the upper flanges of the two high-section channel steels 2. At this time, the small-section channel steel 4 can be welded normally. It is fixed between the lower flanges of two high-section channel steel 2.

In this embodiment, since the horizontal beam is welded and fixed by square steel pipe 1, small-section channel steel 4 and two high-section channel steel 2, the inside of the horizontal beam is hollow, which is not only convenient for pre-embedded The pipeline is buried and easy to replace, which effectively solves the problem of the pipeline being installed and fixed outside the horizontal beam.

In some embodiments, unequal channel steel 3 is installed on the two limiting platforms 7, and the unequal channel steel 3 is that the width of the two flanges of the unequal channel steel 3 is not equal. A larger flange of width on the side channel steel 3 is the long flange 3-1 of the equilateral channel steel, and a smaller flange of the unequal channel steel 3 is the short flange of the unequal channel steel 3. The flange 3-3; the long flange 3-1 of the unequal channel steel 3 is attached to the side wall of the square steel pipe 1, and is welded and fixed with the side wall of the square steel pipe 1, and the web of the unequal channel steel 3 3-2 Fit the upper flange of the high-section channel steel 2, and weld and fix it with the upper flange of the high-section channel steel 2. The welding is all spot welding; the unequal channel steel 3 adopts Q235B structural steel, and the specification of the unequal channel steel 3 is 18b, which not only ensures the strength of the unequal channel steel 3, but also strengthens the connectivity of the lying beam. And make the installation of unequal channel steel 3 more stable. After the unequal channel steel 3 is installed, the short flange 3-3 of the unequal channel steel 3 protrudes upwards relative to the limit platform 7, so that the horizontal prefabricated laminated floor 11 is connected to the horizontal beam during use. It will be lapped on the limit platform 7. When the unequal channel steel 3 is installed on the limit platform 7, the connecting end of the horizontal prefabricated laminated floor 11 will be lapped on the unequal channel steel 3. At this time, The horizontal prefabricated laminated floor 11 needs to reserve a card slot when pouring and forming, so that the short flange 3-3 of the unequal channel steel 3 will be stuck in the carded groove on the horizontal prefabricated laminated floor 11, which not only realizes The positioning between the horizontal beam and the horizontal prefabricated laminated floor 11 has high quality in place, reduces the component installation measures, thereby reducing the project cost, and makes the horizontal prefabricated laminated floor 11 after installation, the short wings of the unequal channel steel 3 The edge 3-3 can limit the displacement of the horizontal prefabricated laminated floor 11 to a certain extent, so that the connection between the horizontal prefabricated laminated floor 11 and the short flange 3-3 of the unequal channel steel 3 is more stable; at the same time, through Using unequal channel steel 3, after the connecting end of the horizontal prefabricated laminated floor 11 is lapped on the unequal channel steel 3, the short flange 3-3 of the unequal channel steel 3 forms a partition wall, effectively preventing The water seeping into the unequal channel steel 3 seeps directly from the edge of the limiting platform 7, thereby changing the seepage path of the traditional connection, which can achieve a good water-stop effect and effectively avoid the problem of water leakage along the assembled components .

In some embodiments, the unequal channel steel 3 also has an obliquely welded steel plate 3 connecting the web 3-2 of the unequal channel steel 3 and the short flange 3-3 of the unequal channel steel 3 -4, one end of the obliquely welded steel plate 3-4 is welded to the short flange 3-3 of the unequal channel steel 3, and the other end of the obliquely welded steel plate 3-4 is connected to the web 3-3 of the unequal channel steel 3 2 Welding and fixing, the obliquely welded steel plate 3-4 is fixed by welding, effectively preventing the short flange 3-3 of the unequal channel steel 3 from yielding, and ensuring that the short flange 3-3 of the unequal channel steel 3 has sufficient Strength, can transmit internal force stably, not only makes the structural strength of the short flange 3-3 of the unequal channel steel 3 greater, and because the short flange 3-3 of the unequal channel steel 3, the unequal channel steel The web 3-2 of 3 and the obliquely welded steel plate 3-4 form a triangular structure, so that the prefabricated bayonet structure on the horizontal prefabricated laminated floor 11 is V-shaped, and the opening width of the bayonet structure on the horizontal prefabricated laminated floor 11 is Greater than the bottom width of the opening structure, the alignment between the horizontal prefabricated laminated floor 11 and the unequal channel steel 3 is faster and more convenient, so that the horizontal prefabricated laminated floor 11 and the unequal channel steel 3 can be automatically corrected, and the horizontal prefabricated The in-position quality of the laminated floor 11 is high, reducing component installation measures, and further reducing project cost.

In some embodiments, the unequal channel steel 3 also has a fine stone concrete pouring layer 12. In the actual use process, the fine stone concrete pouring layer 12 is poured after the horizontal beam is installed, which is effective and convenient for adjusting the level of prefabrication. The placement of the laminated floor slab 11 improves the bonding strength between the horizontal beam and the horizontal prefabricated laminated floor slab 11, and improves the integrity of the connection of the horizontal beam.

In some embodiments, the long flange 3-1 of the unequal channel steel 3 is higher than the square steel pipe 1, so that after the two unequal channel steels 3 are respectively installed on the limit platform 7, due to the two unequal channel The long flanges 3-1 of the steel 3 are all higher than the square steel pipe 1, so that the top surface of the square steel pipe 1 and the long flanges 3-1 of the two unequal channel steel 3 together form a groove structure, so that the prefabricated shear force on the upper side When the wall 8 is connected to the top of the square steel pipe 1, both sides of the upper prefabricated shear wall 8 can be restricted by the long flange 3-1 of the unequal channel steel 3, which not only ensures that the upper prefabricated shear wall 8 can Accurate positioning and installation are realized, and after the upper prefabricated shear wall 8 is installed on the square steel pipe 1, the integrity between the upper prefabricated shear wall 8 and the square steel pipe 1 is better.

In some embodiments, the connecting piece 6 on the bottom surface of the lying beam is located in the small-section channel steel 4. Since the opening of the small-section channel steel 4 is outward, the bottom surface of the lying beam has a groove structure, so that the lying beam is installed , the top of the prefabricated shear wall 9 on the lower side can be clamped in the small-section channel steel 4, so that when the shear wall is connected to the small-section channel steel 4, the two flanges of the small-section channel steel 4 can be aligned with the lower side respectively. Restricting the two sides of the prefabricated shear wall 9 not only ensures that the lying beam and the lower prefabricated shear wall 9 can be accurately positioned and installed, but also makes the distance between the prefabricated shear wall and the lying beam behind the lower prefabricated shear wall 9 Overall better.

In some embodiments, there are two oblique stiffening plates 5 inside the lying beam, and the upper ends of the two oblique stiffening plates 5 respectively support the two limit platforms 7, and the upper ends of the oblique stiffening plates 5 are connected to the high section The upper flange of the channel steel 2 is welded and fixed, the lower end of the oblique stiffening plate 5 is welded and fixed to the lower flange of the high-section channel steel 2 or the rib plate of the high-section channel steel 2, and the thickness of the oblique stiffening plate 5 is 10 mm, effectively The integrity and stress reliability of the lying beam are improved.

In some embodiments, the connecting piece 6 is a pre-embedded bolt. When the beam is processed, screw holes are reserved on the top surface of the beam, the bottom surface of the beam and the two limiting platforms 7, and then the The pre-embedded bolt rod is set in the reserved screw hole, and finally the nut on the pre-embedded bolt rod is welded and fixed to the horizontal beam, which realizes the fixing of the pre-embedded bolt rod and the horizontal beam, so that the pre-embedded bolt rod and the horizontal beam The connection strength is guaranteed; at the same time, in order to facilitate the butt joint between the shear wall above the horizontal beam and the top surface of the square steel pipe 1 after the horizontal beam is installed, the length of the embedded bolt on the square steel pipe 1 can be reduced, so that When the shear wall is installed, the pre-embedded bolt on the square steel pipe 1 can be quickly inserted into the shear wall. Since the unequal channel steel 3 will also be installed on the limit platform 7, when the unequal channel steel 3 is processed, threaded holes are also reserved on the unequal channel steel 3, and installed on the unequal channel steel 3. , the pre-embedded bolt on the limit platform 7 passes through the threaded hole on the unequal channel steel 3, and then a nut is sleeved on the pre-embedded bolt rod, and by tightening the nut, the unequal channel steel 3 It is fixed on the limit platform 7, and finally the nut and the unequal channel steel 3 are welded and fixed. When the pre-embedded bolt rod is installed on the limit platform 7, the unequal channel steel 3 and the horizontal beam are realized. Fixed, not only the installation of unequal channel steel 3 does not need to use other structural parts, but also makes the connection end of the horizontal prefabricated laminated floor 11 lapped on the unequal channel steel 3, the horizontal beam and the horizontal prefabricated superimposed The floor slabs 11 do not need to be connected by an additional connection structure, which makes the structure of the lying beam simpler and improves the overall stability and reliability of the lying beam.

When it is necessary to process the lying beam, first weld the two oblique stiffeners 5 into the two high-section channel steels 2 respectively, and connect the upper flanges of the two high-section channel steels 2 to the two sides of the square steel pipe 1 respectively. The side is welded and fixed, and the long flange 3-1 of the unequal channel steel 3 is attached to the side wall of the square steel pipe 1, and the short flange 3-3 of the unequal channel steel 3 is connected to the side wall of the high section channel steel 2. The upper flanges are fitted together, and the unequal channel steel 3, the high-section channel steel 2, and the square steel pipe 1 are jointly welded and fixed, and finally the two flanges of the small-section channel steel 4 are respectively connected to the lower wing of the high-section channel steel 2 The edge is welded and fixed to complete the processing of the horizontal beam. Install the pre-embedded bolt on the upper flange of the unequal channel steel 3 and the high-section channel steel 2, and set the nut on the upper end of the bolt after the pre-embedded bolt is installed, so that the unequal channel steel 3 and the high-section The upper flange of the channel steel 2 is locked and fixed, and the nut is welded and fixed with the unequal channel steel 3, and the nut of the pre-embedded bolt is welded and fixed with the upper flange of the high-section channel steel 2; Install the pre-embedded bolt on the surface and the small-section channel steel 4, and weld and fix the nut on the pre-embedded bolt after the pre-embedded bolt is installed.

The prefabricated steel horizontal beam provided in this embodiment is directly formed by welding the square steel pipe 1, the high-section channel steel 2, and the small-section channel steel 4, so that the inside of the horizontal beam is hollow, which facilitates the pre-embedding of pipelines after installation; at the same time, due to The horizontal beam is a steel member, so that the produced horizontal beam has good mechanical properties and high shear strength. Compared with ordinary cast-in-place horizontal beams, the local shear resistance can be effectively improved, and in actual construction, it is light in weight and easy to carry , hoisting, and positioning, which can realize centralized and unified processing of prefabricated components in the factory, on-site assembly, and rapid construction. By reserving pre-embedded bolts on the horizontal beam, it is more convenient to connect with PC components in the later stage, and by setting oblique reinforcement The plate 5 effectively improves the bearing capacity and stability of the lying beam.

Example 2

As shown in Fig. 4 and Fig. 5, this embodiment also provides a prefabricated floor connection structure, including any lying beam provided in Embodiment 1; meanwhile, it also includes an upper prefabricated shear wall 8, a lower side The prefabricated shear wall 9 and two horizontal prefabricated laminated floors 11, the upper prefabricated shear wall 8 is located above the lying beam, the lower prefabricated shear wall 9 is located below the lying beam, and the two horizontal prefabricated laminated floors 11 are respectively Located on both sides of the lying beam; the lower end face of the upper prefabricated shear wall 8 is connected to the top surface of the lying beam, and is fixedly connected through the pre-embedded bolts on the top surface of the lying beam, while the lower prefabricated shear wall The upper end surface of the wall 9 is connected to the lower end surface of the lying beam, and is fixedly connected by the embedded bolt on the bottom surface of the lying beam. And the lying beam is connected and fixed with the horizontal prefabricated laminated floor 11 through the pre-embedded bolt on the limiting platform 7 .

The prefabricated floor connection structure provided in this embodiment realizes the connection between the lying beam and the upper prefabricated shear wall 8, the lower prefabricated shear wall 9, and the horizontal prefabricated laminated floor 11 through pre-embedded bolts, which can effectively avoid on-site Wet connection, green and environmentally friendly, fast construction speed, easy to quickly place and fix; pre-embedded bolts are replaceable, easy to install, easy to disassemble, and increase the overall service life of the connection structure. Because the horizontal beam is a steel composite component, it is designed according to the mechanical characteristics of the structure, which not only ensures the stability of the horizontal beam itself, but also makes the horizontal beam and the upper prefabricated shear wall 8, the lower prefabricated shear wall 9, and the horizontal prefabricated laminated floor 11 After the connection, the reliability of the connection between the lying beam and the prefabricated shear wall and the prefabricated floor is effectively improved.

In some embodiments, when the unequal channel steel 3 is installed on the limit platform 7, since the short flange 3-3 of the unequal channel steel 3 is upwardly protruding, the horizontal prefabricated laminated floor 11 is After prefabrication, the side of the horizontal prefabricated laminated floor 11 and the unequal channel steel 3 must have a slot, so that when the horizontal prefabricated laminated floor 11 is erected on the unequal channel steel 3, the unequal channel steel 3 The short flange 3-3 can be clamped in the slot on the horizontal prefabricated laminated floor 11, so that a clamping structure is formed between the horizontal laminated floor and the unequal channel steel 3, realizing the superposition of the horizontal beam and the horizontal prefabricated The positioning between the floor slabs 11 has high quality in place, reduces component installation measures, thereby reducing the project cost, and enables the short flanges 3-3 of the unequal channel steel 3 to be fixed at a certain level after the horizontal prefabricated laminated floor slabs 11 are installed. The displacement of the horizontal prefabricated laminated floor 11 is limited to a certain extent, so that the connection between the horizontal prefabricated laminated floor 11 and the short flange 3-3 of the unequal channel steel 3 is more stable; at the same time, by using the unequal channel steel 3 After the connecting end of the horizontal prefabricated laminated floor 11 is lapped on the unequal channel steel 3, the short flange 3-3 of the unequal channel steel 3 forms a partition wall, which effectively prevents the infiltration into the unequal channel steel 3 The water on the top directly infiltrates into the room, thus changing the water seepage path of the traditional connection, which can have a good water-stop effect and effectively avoid the problem of water leakage along the fabricated components.

In some embodiments, since the horizontal beam in the horizontal beam is welded by the square steel pipe 1, the small-section channel steel 4 and two high-section channel steels 2, and the long flanges of the two unequal channel steels 3 3-1 is higher than the top of the square steel pipe 1, so that when the lower prefabricated shear wall 9 and the upper prefabricated shear wall 8 are installed, the connection end of the lower prefabricated shear wall 9 can be plugged into the small section channel steel 4 In the opening, the connecting end of the upper prefabricated shear wall 8 can be inserted between the long flanges 3-1 of the two unequal channel steels 3, and the connecting end of the upper prefabricated shear wall 8 can be connected to the square steel pipe 1, so that when the horizontal beam and the upper prefabricated shear wall 8 are installed, the horizontal beam is occluded with the lower prefabricated shear wall 9 and the upper prefabricated shear wall 8, which not only ensures that the horizontal beam, the lower side The verticality of the prefabricated shear wall 9 and the upper prefabricated shear wall 8, and the horizontal beam, the lower prefabricated shear wall 9, and the upper prefabricated shear wall 8 can be quickly positioned during installation, so that the horizontal beam, the lower side The integrity between the prefabricated shear wall 9 and the upper prefabricated shear wall 8 is better.

In some embodiments, the side walls of the upper prefabricated shear wall 8 and the lower prefabricated shear wall 9 are provided with notches 10, the notches 10 can be rectangular, circular or other shapes, the upper prefabricated The depth direction of the notch 10 on the shear wall 8 is consistent with the thickness direction of the upper prefabricated shear wall 8, and the depth direction of the notch 10 on the lower prefabricated shear wall 9 is consistent with the thickness direction of the lower prefabricated shear wall 9 , the height of the notch 10 corresponds to the position of the extension end of the pre-embedded bolt rod, and the upper prefabricated shear wall 8, the lower prefabricated shear wall 9 and the horizontal prefabricated laminated floor 11 all have reserved channels, and the upper prefabricated shear wall The length direction of the reserved holes on the force wall 8, the lower prefabricated shear wall 9 and the horizontal prefabricated laminated floor 11 are all consistent with the vertical direction, and the diameter of the reserved holes is slightly larger than that of the pre-embedded bolt. The butt joint between the side prefabricated shear wall 8 and the top of the square steel pipe 1 during installation can reduce the length of the pre-embedded bolt on the square steel pipe 1, so that when the upper prefabricated shear wall 8 is installed, the pre-embedded bolt on the square steel pipe 1 The bolts can be quickly and accurately inserted into the reserved channels on the upper prefabricated shear wall 8; at the same time, in order to facilitate the insertion of the pre-embedded bolts in the reserved channels, the distance between the pre-embedded bolts and the reserved channels can also be adjusted. Keep the gap between 0.5 ~ 1.5mm. When the upper prefabricated shear wall 8 and the lower prefabricated shear wall 9 are installed, the pre-embedded bolt on the top of the square steel pipe 1 runs through the reserved channel on the upper prefabricated shear wall 8 and extends into the notch 10, The pre-embedded bolts on the small-section channel steel 4 run through the reserved channel on the lower prefabricated shear wall 9 and extend into the notch 10, while the pre-embedded bolts on the large-section channel steel can directly penetrate the horizontal prefabricated laminated floor 11, it is enough to lock and fix the extension end of the pre-embedded bolt rod through the locking member 13 at last, where the locking member 13 can be a nut or other locking structure.

The prefabricated steel horizontal beam connection structure provided by the present invention has high strength, light weight, simple manufacturing process, and the horizontal beam is hollow inside, and pipelines can be pre-embedded; The card slots on the laminated floor 11 cooperate to form a mortise and tenon connection structure between the unequal channel steel 3 and the horizontal prefabricated laminated floor 11, which not only can effectively improve the connection stability between the lying beam and the laminated slab, but also has It is beneficial to the positioning and connection between the horizontal prefabricated laminated slab 11 and the lying beam. By reserving the pre-embedded bolts on the lying beams, and reserving the reserved channels corresponding to the pre-embedded bolts on the upper prefabricated shear wall 8, the lower prefabricated shear wall 9 and the horizontal prefabricated laminated floor 11, The connection between the lying beam and the prefabricated shear wall is guaranteed, so that there is no need to bind steel bars during the connection construction, and there is no need to install additional formwork.

The upper prefabricated shear wall 8 and the lower prefabricated shear wall 9 provided in the present invention may also be steel plate shear walls.

Example 3

This embodiment provides a prefabricated floor connection method. The prefabricated floor connection method mainly connects the shear wall and the laminated floor through horizontal beams; during installation, the lower prefabricated shear wall 9 is positioned and installed. The horizontal beam is hoisted by the hoisting equipment, and the embedded bolts on the bottom surface of the horizontal beam correspond to the reserved holes on the lower prefabricated shear wall 9 during the hoisting process, and the embedded bolts on the bottom surface of the horizontal beam are gradually removed. The root is inserted into the reserved channel of the lower prefabricated shear wall 9, and the extension end of the pre-embedded bolt rod on the bottom surface of the lying beam extends to the notch 10 on the lower prefabricated shear wall 9. By using the locking piece 13 Lock and fix the extension end of the pre-embedded bolt rod on the bottom surface of the lying beam with the lower prefabricated shear wall 9; use the same method to hoist the upper prefabricated shear wall through the hoisting equipment, and during the hoisting process, the lying beam The pre-embedded bolts on the top surface correspond to the reserved channels on the upper prefabricated shear wall 8, and gradually insert the pre-embedded bolts on the top surface of the lying beam into the reserved channels on the upper prefabricated shear wall 8 , and extend the extension end of the pre-embedded bolt on the top surface of the horizontal beam to the notch 10 on the upper prefabricated shear wall 8, and connect the extension end of the embedded bolt on the top surface of the horizontal beam to the notch 10 on the upper prefabricated shear wall The prefabricated shear wall 8 on the upper side is locked and fixed.

The horizontal prefabricated laminated floor 11 is hoisted by hoisting equipment, the connecting end of the horizontal prefabricated laminated floor 11 is lapped on the limit platform 7, and the limit platform The pre-embedded bolts on 7 are inserted into the reserved channels of the horizontal prefabricated laminated floor 11 one by one. The embedded bolt rod completely penetrates the reserved channel of the horizontal prefabricated laminated floor 11, and the extension end of the embedded bolt rod on the limiting platform 7 is locked and fixed with the upper prefabricated shear wall 8 by using the locking member 13.

In some embodiments, when the unequal channel steel 3 is installed on the limit platform 7, since the short flange 3-3 of the unequal channel steel 3 is upwardly protruding, the horizontal prefabricated laminated floor 11 In the process of being connected to the limit platform 7, the slot on the horizontal prefabricated laminated floor 11 corresponds to the short flange 3-3 of the unequal channel steel 3, so that the short flange 3 of the unequal channel steel 3 -3 can be clamped in the card groove on the horizontal prefabricated laminated floor 11, so that the clamping structure is formed between the horizontal laminated floor and the unequal channel steel 3, not only realizing the connection between the horizontal beam and the horizontal prefabricated laminated floor 11 The positioning is high, the installation quality is high, and the component installation measures are reduced, thereby reducing the project cost, and after the horizontal prefabricated laminated floor slab 11 is installed, the short flange 3-3 of the unequal channel steel 3 can limit the level to a certain extent. The displacement of the prefabricated laminated floor 11 makes the connection between the horizontal prefabricated laminated floor 11 and the short flange 3-3 of the unequal channel steel 3 more stable; at the same time, by using the unequal channel steel 3, the horizontal prefabricated After the connecting end of the laminated floor 11 is lapped on the unequal channel steel 3, the short flange 3-3 of the unequal channel steel 3 forms a partition wall, which effectively prevents the water from penetrating into the unequal channel steel 3. It directly enters the room, thus changing the seepage path of the traditional connection, which can achieve a good water-stop effect and effectively avoid the problem of water leakage caused by cracks along the assembled components.

In some embodiments, the horizontal beam is welded by a square steel pipe 1, a small-section channel steel 4 and two high-section channel steels 2, and by making the long flanges 3-1 of the two unequal channel steels 3 high On the top of the square steel pipe 1, when the lower prefabricated shear wall 9 and the upper prefabricated shear wall 8 are installed, the connecting end of the lower prefabricated shear wall 9 is plugged into the opening of the small-section channel steel 4, and the upper side The connecting end of the prefabricated shear wall 8 is inserted between the long flanges 3-1 of the two unequal channel steels 3, and the connecting end of the upper prefabricated shear wall 8 is fixedly connected to the top of the square steel pipe 1, The connecting end of the prefabricated shear wall 8 on the upper side is fixedly connected with the small-section channel steel 4 .

In some embodiments, before erecting the horizontal prefabricated laminated floor slab 11, a small amount of fine stone concrete is poured onto the unequal channel steel 3, and the nuts locking the unequal channel steel 3 are covered by a small amount of fine stone concrete. In the stone concrete, the fine stone concrete pouring layer 12 is formed on the unequal channel steel 3, and after the horizontal prefabricated laminated floor 11 is lapped, move towards the joint between the horizontal prefabricated laminated floor 11 and the unequal channel steel 3 Inject structural glue; at the same time, it can also be injected between the upper prefabricated shear wall and the square steel pipe 1, the long flange 3-1 of the unequal channel steel 3, and between the lower prefabricated shear wall and the small cross-section channel steel 4 Structural glue.

In the description of this specification, descriptions referring to the terms "one embodiment/mode", "some embodiments/modes", "examples", "specific examples", or "some examples" mean that the embodiments/modes are combined The specific features, structures, materials or characteristics described in or examples are included in at least one embodiment/mode or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment/mode or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments/modes or examples in an appropriate manner. In addition, those skilled in the art may combine and combine different embodiments/modes or examples and features of different embodiments/modes or examples described in this specification without conflicting with each other.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

It should be understood by those skilled in the art that the above embodiments are only for clearly illustrating the present invention, rather than limiting the scope of the present invention. For those skilled in the art, other changes or modifications can be made on the basis of the above disclosure, and these changes or modifications are still within the scope of the present invention.

Claims (7)

1. The prefabricated profile steel horizontal beam is characterized in that the cross section of the horizontal beam is in a convex shape, the horizontal beam is a profile steel combined component, limiting platforms (7) are arranged on two sides of the horizontal beam, connecting pieces (6) are arranged on the top surface of the horizontal beam, the bottom surface of the horizontal beam and the two limiting platforms (7), and at least two connecting pieces (6) are arranged on the top surface of the horizontal beam, the bottom surface of the horizontal beam and the two limiting platforms (7); the horizontal beam comprises a square steel pipe (1), a small-section channel steel (4) and two high-section channel steels (2), wherein the two high-section channel steels (2) are oppositely arranged left and right, the square steel pipe (1) is jointly installed on the upper flanges of the two high-section channel steels (2), the small-section channel steel (4) is jointly installed between the lower flanges of the two high-section channel steels (2), and the opening of the small-section channel steel (4) faces outwards; unequal-side channel steel (3) is mounted on each of the two limiting platforms (7), long flanges (3-1) of the unequal-side channel steel (3) are fixed with the square steel pipe (1), and webs (3-2) of the unequal-side channel steel (3) are fixed with the high-section channel steel (2); the unequal-side channel steel (3) is also provided with an oblique welding steel plate (3-4) which is used for connecting a web plate (3-2) of the unequal-side channel steel (3) and a short flange (3-3) of the unequal-side channel steel (3); a fine aggregate concrete pouring layer (12) is arranged in the unequal-sided channel steel (3); the long flange (3-1) of the unequal-side channel steel (3) is higher than the square steel pipe (1).

2. Prefabricated steel sectional sleeper beam according to claim 1, characterized in that the connectors (6) on the bottom surface of the sleeper beam are located in small section channel beams (4).

3. The precast steel horizontal beam as claimed in claim 1, wherein two oblique stiffening plates (5) are further arranged in the horizontal beam, and the upper ends of the two oblique stiffening plates (5) support the two limiting platforms (7) respectively.

4. A prefabricated floor slab connecting structure is characterized by comprising the horizontal beam as claimed in claim 1, 2 or 3, and further comprising an upper prefabricated shear wall (8), a lower prefabricated shear wall (9) and two horizontal prefabricated composite floor slabs (11), wherein the upper prefabricated shear wall (8) is fixed on the top surface of the horizontal beam, the lower prefabricated shear wall (9) is fixed on the bottom surface of the horizontal beam, and the connecting ends of the two horizontal prefabricated composite floor slabs (11) are respectively lapped on the two limiting platforms (7) to form the connecting structure taking the horizontal beam as the center.

5. The precast floor slab connection structure according to claim 4, wherein the side walls of the upper precast shear wall (8) and the lower precast shear wall (9) are provided with notches (10), and the connecting members (6) extend into the notches (10) for locking.

6. A precast floor slab connection method is characterized by comprising the precast floor slab connection structure according to claim 4, wherein the lower precast shear wall (9) is positioned and installed, the horizontal beam is installed on the lower precast shear wall (9), the upper precast shear wall (8) is fixed on the top surface, the connecting ends of the two horizontal precast composite floor slabs (11) are respectively overlapped on the two limiting platforms (7), and are respectively fixed with the upper precast shear wall (8), the lower precast shear wall (9) and the horizontal precast composite floor slabs (11) through the top surface of the horizontal beam, the bottom surface of the horizontal beam and the connecting pieces (6) of the two limiting platforms (7).

7. The precast floor slab connection method according to claim 6, wherein the fine stone concrete is poured on the position limiting platform (7) before the horizontal precast composite floor slab (11) is installed.

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