Prefabricated horizontal member joint construction structure and construction method thereof

Abstract

The invention discloses a prefabricated horizontal member joint construction structure and a construction method thereof, and relates to the technical field of building member connecting structures. According to the method, a throwing-out anchor bar and a connecting steel bar do not need to be reserved, the construction operation difficulty is reduced, and the quality problem caused by inaccurate positioning is avoided; a steel plate wrapping edge is arranged on the outer side of prefabricated concrete, the rigidity of the steel plate wrapping edge is increased, the steel plate wrapping edge is consistent with steel beam deformation, a left side prefabricated concrete plate and a structural steel beam are in an inserted connection relation to form a sliding support, and during shaking, the left side prefabricated concrete plate moves outwards to buffer structural shaking energy impact and cope with structural collapse caused by earthquake deformation; the joint design is reasonable, the strength, the rigidity and the stability are improved, and meanwhile the plastic deformation space is enlarged.

Description

Technical Field

[0001] This invention relates to the field of building component connection structure technology, and in particular to a prefabricated horizontal component joint structure and its construction method. Background Technology

[0002] In the construction and construction methods of horizontal component connection joints in prefabricated buildings, the following methods are generally adopted: (1) Prefabricated horizontal components with extended anchor bars are placed on the upper flange surface of the steel beam, leaving a 300mm width for post-casting construction; (2) Prefabricated components with reserved bars on both sides are inserted into the reserved holes in the web of the steel beam and the reserved wet joint in the middle is post-cast. The above methods have limitations: the construction of reserved anchor bars is difficult and inefficient; formwork is difficult, the casting quality is difficult to guarantee, there are many overlapping procedures, the finished product protection is difficult, the construction speed is slow, and the implementation effect is poor. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a prefabricated horizontal component joint structure and its construction method.

[0004] To achieve this technical objective, the present invention adopts the following solution: The construction method for the joint structure of precast horizontal components includes the following steps: One end face of the precast concrete is L-shaped, and several anchor bars are fixed on the inner side of the connecting plate. The connecting plate is fixed to the end face of the precast concrete through the anchor bars to form a precast concrete slab. In the horizontal lattice steel beam method, the L-shaped end faces of the precast concrete slabs on the left and right sides are inserted into the openings of the lattice steel beam on the same side using lifting equipment, so that the precast concrete slabs are tightly connected to the lower flange and web of the lattice steel beam. The precast concrete slab on the right side is welded and fixed to the lattice steel beam. After adjusting the position, the post-cast section is poured to form an integral connection node. When shaking occurs, the precast concrete slab on the left side and the lattice steel beam will move relative to each other, withstand appropriate deformation, and ensure the safety of the entire structure.

[0005] Preferably, anti-corrosion and fireproof coating is applied to the outer surface of the connecting plate of the precast concrete slab before hoisting.

[0006] Preferably, the outer wall of the connecting plate of the right precast concrete slab located on the upper side of the lattice steel beam is fixed with several anchor bars to increase the connection strength between the right precast concrete slab and the post-cast section.

[0007] Preferably, several studs are fixed on the upper side of the lattice steel beam to increase the connection between the lattice steel beam and the post-cast section.

[0008] Preferably, the lattice steel beams are H-beams or I-beams.

[0009] Preferably, corner protectors are installed at the inside and outside corners of the precast concrete end face, and the inside of the corner protectors is fixed to the outside of the precast concrete by anchor bars to form a precast concrete slab.

[0010] The present invention also provides a precast horizontal component joint structure, including precast concrete and a lattice steel beam. The end face of the precast concrete is L-shaped, and a connecting plate is fixedly connected to the L-shaped end face by anchor bars to form a precast concrete slab. Lateral insertion slots are provided on both sides of the lattice steel beam. The L-shaped end faces of the left and right precast concrete slabs are respectively inserted into the lateral insertion slots of the lattice steel beam on the same side, and the end face of the right precast concrete slab is fixedly connected to the lattice steel beam. The section between the lattice steel beam and the precast concrete slab is a post-cast section, which forms an integral joint structure after the concrete is poured.

[0011] Preferably, anchor bars are fixed to the outer wall of the right precast concrete slab above the lattice steel beam, and the anchor bars are cast in the post-cast section.

[0012] Preferably, corner guards are fixed at the inside and outside corners of the L-shaped end face of the precast concrete slab, and the sidewalls of the corner guards are connected to the precast concrete by anchor bars.

[0013] Preferably, the upper side of the lattice steel beam is fixed with studs, which are cast in the post-cast section.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) This invention does not require pre-reserved anchor bars and splice bars, reducing the difficulty of construction operations and avoiding quality problems caused by inaccurate positioning; (2) The floor slab height is increased downward to cover the steel beam, hiding the steel beam, avoiding the difficulty of subsequent decoration, and improving aesthetics; (3) The width of the flange surface after pouring is increased to the same width as the steel beam flange, increasing the contact surface and eliminating the need for formwork, which facilitates construction operations and allows for better bonding to form an integral whole; (4) Studs are set to replace pre-reserved anchor bars, improving construction efficiency, making the design more reasonable, and achieving good implementation results; (5) Steel plates are set on the outer side to increase its stiffness and make it consistent with the deformation of the steel beam. The precast concrete slab on the left side is connected to the structural steel beam, forming a sliding support. When shaking, the precast concrete slab on the left side moves outward to buffer the impact of structural shaking energy and cope with the structural collapse caused by deformation during earthquakes; (6) The node design is reasonable, increasing strength, stiffness, and stability while also improving the space for plastic deformation. Attached Figure Description

[0015] Figure 1 A schematic cross-sectional view of the prefabricated horizontal component joint structure provided by the present invention; Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle; The markings in the diagram are: 1. Left sliding concrete slab; 2. Right anchored concrete slab; 3. Lattice steel beam; 4. Anchor bar; 5. Corner guard; 6. Stud; 7. Connecting plate; 8. Post-cast section. Detailed Implementation

[0016] To fully understand the purpose, features and effects of the present invention, the present invention will be described in detail through the following specific embodiments, but the present invention is not limited thereto.

[0017] The present invention provides a construction method for a joint structure of a precast horizontal component, comprising the following steps: Step 1: One end face of the precast concrete is L-shaped. Several anchor bars 4 are fixed to the inner side of the connecting plate 7. The connecting plate 7 is fixed to the end face of the precast concrete through the anchor bars 4 to form a precast concrete slab. Preferably, corner guards 5 are installed at the inside and outside corners of the precast concrete end face. The inner side of the corner guards 5 is fixed to the outer side of the precast concrete through the anchor bars 4 to form a precast concrete slab.

[0018] Step 2: Using a horizontal lattice steel beam 3, the L-shaped ends of the precast concrete slabs on the left and right sides are inserted into the openings of the lattice steel beam 3 on the same side using lifting equipment, ensuring a tight connection between the precast concrete slabs and the lower flange and web of the lattice steel beam 3. The right-side anchoring concrete slab 2 is then welded and fixed to the lattice steel beam. Preferably, before hoisting, an anti-corrosion and fireproof coating is applied to the outer surface of the connecting plate 7 of the precast concrete slab.

[0019] Several anchor bars are fixed to the outer wall of the connecting plate of the right anchor concrete slab 2 located on the upper side of the lattice steel beam 3 to increase the connection strength between the right anchor concrete slab 2 and the post-cast section 8. Several studs 6 are fixed to the upper side of the lattice steel beam 3 to increase the connection strength between the lattice steel beam 3 and the post-cast section 8.

[0020] Step 3: After adjusting the position, pour the post-cast section 8 to form an integral connection node. When shaking occurs, the precast concrete slab on the left and the lattice steel beam 3 will move relative to each other, withstand appropriate deformation, and ensure the safety of the entire structure.

[0021] like Figure 1 and Figure 2 As shown, the precast horizontal component joint structure obtained by the above construction method includes precast concrete and a lattice steel beam 3. The end face of the precast concrete is an L-shaped structure, and a connecting plate 7 is fixedly connected to the L-shaped end face by anchor bars 4 to form a precast concrete slab. Lateral insertion ports are provided on both sides of the lattice steel beam 3. The L-shaped end faces of the left sliding concrete slab 1 and the right anchoring concrete slab 2 are respectively inserted into the lateral insertion ports of the lattice steel beam 3 on the same side, and the end face of the right anchoring concrete slab 2 is fixedly connected to the lattice steel beam 3. The section between the lattice steel beam 3 and the precast concrete slab is a post-cast section 8, which forms an integral joint structure after the concrete is poured.

[0022] Furthermore, anchor bars 4 are fixed to the outer wall of the right-side anchored concrete slab 2 above the lattice steel beam 3, and the anchor bars 4 are cast in the post-cast section 8. Corner guards 5 are fixed at the internal and external corners of the L-shaped end face of the precast concrete slab, and the side walls of the corner guards 5 are connected to the precast concrete through anchor bars 4. Studs 6 are fixed to the upper side of the lattice steel beam 3, and the studs 6 are cast in the post-cast section 8.

[0023] On-site construction example: Step 1: Bind according to the drawing requirements. Cut steel plates as connecting plates 7 according to the outer contour of the precast concrete block of the horizontal component. Weld anchor bars 4 to the inside of the connecting plate 7 to increase its contact area and bond strength with the concrete.

[0024] While installing the steel reinforcement cage (precast concrete formwork) for the horizontal components, the connecting plate is installed. Corner guards 5 (which can be made of angle steel) are installed at the inside and outside corners. Anchor bars 4 are welded to the concrete contact surface of the corner guards 5. At the same time, the formwork is erected and concrete is poured to form a precast concrete slab.

[0025] Step 2: Using H-beams or I-beams as the lattice steel beams 3, apply anti-corrosion and fire-retardant coating to the outer surface of the connecting plate 7 before hoisting the precast concrete slab. The precast concrete slab includes a right-side anchoring concrete plate 2 and a left-side sliding concrete plate 1. Then, using lifting equipment, insert the right-side anchoring concrete plate 2 and the left-side sliding concrete plate 1 into the corresponding side slots of the lattice steel beam 3, ensuring a tight connection. Next, weld the right-side anchoring concrete plate 2 to the lattice steel beam 3 for fixation. No welding is applied to the left-side sliding concrete plate 1. Weld studs 6 at regular intervals within the post-cast section 8 above the flange of the lattice steel beam 3.

[0026] Step 3: After adjusting the position of the precast concrete slab, pour concrete for the post-cast section 8 to form an integral connection node. Anchor bars are installed on the contact surface between the left sliding concrete slab 1 and the concrete (right wall of the left sliding concrete slab 1) in the post-cast section 8, and anchor bars 4 are installed on the contact surface between the right anchor concrete slab 2 and the concrete (left wall of the right anchor concrete slab 2) in the post-cast section to form an integral structure.

[0027] In the event of an earthquake or shaking, the sliding concrete slab 1 on the left and the lattice steel beam 3 are non-welded movable contact surfaces, which can withstand appropriate deformation and positional movement to release energy and ensure the safety of the entire node and structure.

[0028] Optimized approach: The precast concrete slab at position 7 (end) corresponding to the connecting plate is made solid, while other interval positions are made into rectangular hollow slabs. This can reduce the self-weight and improve the effective connection.

[0029] Finally, it should be noted that the above-listed embodiments are merely preferred embodiments of the present invention. Of course, those skilled in the art can make modifications and variations to the present invention. If such modifications and variations fall within the scope of the claims of the present invention and their equivalents, they should be considered as being within the protection scope of the present invention.

Claims

1. A construction method for a joint structure of precast horizontal components, characterized in that, Includes the following steps: One end face of the precast concrete is L-shaped, and several anchor bars are fixed on the inner side of the connecting plate. The connecting plate is fixed to the end face of the precast concrete through the anchor bars to form a precast concrete slab. In the horizontal lattice steel beam method, the L-shaped end faces of the precast concrete slabs on the left and right sides are inserted into the openings of the lattice steel beam on the same side using lifting equipment, so that the precast concrete slabs are tightly connected to the lower flange and web of the lattice steel beam. The precast concrete slab on the right side is welded and fixed to the lattice steel beam. After adjusting the position, the post-cast section is poured to form an integral connection node. When shaking occurs, the precast concrete slab on the left side and the lattice steel beam will move relative to each other, withstand appropriate deformation, and ensure the safety of the entire structure.

2. The construction method for the joint structure of prefabricated horizontal components according to claim 1, characterized in that, Before hoisting, apply anti-corrosion and fireproof coating to the outer surface of the connecting plate of the precast concrete slab.

3. The construction method for the joint structure of prefabricated horizontal components according to claim 1, characterized in that, Several anchor bars are fixed to the outer wall of the connecting plate of the right precast concrete slab located on the upper side of the lattice steel beam to increase the connection between the right precast concrete slab and the post-cast section.

4. The construction method for the joint structure of prefabricated horizontal components according to claim 1, characterized in that, Several studs are fixed on the upper side of the lattice steel beam to increase the connection between the lattice steel beam and the post-cast section.

5. The construction method for the joint structure of prefabricated horizontal components according to claim 1, characterized in that, The lattice steel beams are H-beams or I-beams.

6. The construction method for the joint structure of prefabricated horizontal components according to claim 1, characterized in that, Corner guards are installed at the inside and outside corners of the precast concrete end face. The inside of the corner guards is fixed to the outside of the precast concrete by anchor bars to form a precast concrete slab.

7. A prefabricated horizontal component joint structure, characterized in that, It includes precast concrete and lattice steel beams. The end face of the precast concrete is L-shaped, and a connecting plate is fixedly connected to the L-shaped end face by anchor bars to form a precast concrete slab. The lattice steel beams have lateral insertion slots on both sides. The L-shaped end faces of the precast concrete slabs on the left and right sides are respectively inserted into the lateral insertion slots of the lattice steel beams on the same side, and the end face of the precast concrete slab on the right side is fixedly connected to the lattice steel beam. The section between the lattice steel beams and the precast concrete slabs is a post-cast section, which forms an integral joint structure after the concrete is poured.

8. The prefabricated horizontal component joint structure according to claim 7, characterized in that, Anchor bars are fixed to the outer wall of the precast concrete slab on the right side above the lattice steel beam, and the anchor bars are poured in the post-cast section.

9. The prefabricated horizontal component joint structure according to claim 7, characterized in that, Corner guards are fixed at the inside and outside corners of the L-shaped end face of the precast concrete slab, and the sidewalls of the corner guards are connected to the precast concrete by anchor bars.

10. The prefabricated horizontal component joint structure according to claim 7, characterized in that, The upper side of the lattice steel beam is fixed with studs, which are cast in the post-cast section.

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