A connecting structure of a concrete prefabricated coupling beam and a core tube

Abstract

The utility model relates to the technical field of assembly type building construction, and disclose a kind of concrete prefabricated coupling beam and core tube connecting structure, including the shear wall and prefabricated beam with the reserved hole being set in top, the prefabricated beam includes lap joint part and support part, the reserved hole is L type and internally embedded with vertical reinforcement, the surface lap joint of lap joint part and reserved hole, the side wall of support part and the side wall of shear wall are in same vertical line, the inside of lap joint part is equipped with grouting sleeve, the utility model provides a kind of concrete prefabricated coupling beam and core tube connecting structure, by the cooperation of lap joint part, support part and grouting sleeve, can directly lap joint part lap joint in the reserved hole reserved in shear wall, reduce the difficulty of subsequent pouring and construction, improve construction efficiency, cooperate reserved hole can avoid the position that lap joint part needs to place, avoid the shielding of vertical reinforcement and stirrup in hidden pile to prefabricated beam.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated building construction technology, specifically to a precast concrete connecting beam and core tube connection structure. Background Technology

[0002] In recent years, high-rise concrete shear wall structures have become the mainstream form in residential buildings. To improve living comfort and space utilization, the split core tube structure has been widely used because it can achieve north-south ventilation for all unit types. However, the span of the connecting corridor in this structural form is relatively large. If it is necessary to set up non-continuous suspended moldings or functional components, the lower part often lacks effective support.

[0003] Traditional methods often employ on-site formwork and pouring, requiring the erection of large-scale cantilevered scaffolding as temporary support. This construction method is not only complex and time-consuming to erect, but also poses certain safety hazards. In addition, on-site operations are constrained by factors such as weather and manpower, resulting in low construction efficiency. Furthermore, since shear walls typically have a large number of longitudinal bars and stirrups pre-embedded within them, areas with dense reinforcement are prone to collisions, further increasing the difficulty of on-site installation and pouring, and affecting the quality of node connections and the reliability of the overall structure. Therefore, a device is needed to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a precast concrete connecting beam and core tube connection structure, which solves the problems of high construction difficulty and low efficiency in the construction of suspended moldings.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a precast concrete connecting beam and core tube connection structure, including a reserved hole opened at the top of the core tube shear wall and a precast beam, the precast beam including an overlapping part and a supporting part, the reserved hole being L-shaped and having vertical steel bars embedded inside, the overlapping part overlapping with the upper surface of the reserved hole; The side wall of the support is on the same vertical line as the side wall of the shear wall. The inside of the lap joint is provided with a grouting sleeve. The bottom of the grouting sleeve is sleeved with the top of the vertical reinforcement. The upper surface of the grouting sleeve is provided with an extension reinforcement. The top of the extension reinforcement passes through the top of the lap joint, and the extension reinforcement and the vertical reinforcement are on the same axis. The ends of the precast beams are provided with embedded steel bars, which are tied and fixed to the internal steel bars of the shear wall. The precast beams and shear walls are connected by concrete pouring to fix the precast beams in the core tube shear wall.

[0006] Optionally, the internal reinforcement of the shear wall includes horizontal reinforcement, and the outer surface of the vertical reinforcement is fitted with stirrups to restrain the vertical reinforcement. The horizontal reinforcement is tied and fixed to the vertical reinforcement.

[0007] Optionally, multiple support ribs are pre-embedded inside the support part. The support ribs are arranged longitudinally at intervals. Multiple transversely arranged extension steel bars are tied to the support ribs. Reinforcing ribs are tied to the extension steel bars. Multiple reinforcing ribs are arranged at intervals along the extension direction of the extension steel bars, and the reinforcing ribs are arranged at intervals with the support ribs.

[0008] Optionally, the embedded reinforcing bars include connecting reinforcing bars embedded in the support portion, and the connecting reinforcing bars are tied and fixed to the internal reinforcing bars of the support portion.

[0009] Optionally, the connecting steel bars are tied and fixed to the internal steel bars of the shear wall, including transverse steel bars.

[0010] Optionally, the length of the bottom extension steel bar of the support portion is greater than the length of the precast beam, so that the extension steel bar extends from the end of the lap joint.

[0011] Optionally, the extended reinforcing bar has a bend in the middle so that the extended reinforcing bar gathers at the lap joint to form a reinforcing cage.

[0012] This utility model provides a connection structure between a precast concrete connecting beam and a core tube, which has the following advantages: This utility model provides a connection structure between a precast concrete connecting beam and a core tube. Through the coordinated arrangement of an lap joint, a support section, and a grouting sleeve, the lap joint can be directly overlapped into a pre-drilled hole in the shear wall, reducing the difficulty of subsequent pouring and construction, and improving construction efficiency. The pre-drilled hole allows for avoidance of the required placement of the lap joint, preventing the longitudinal reinforcement and stirrups in the hidden pile from obstructing the precast beam, thus facilitating the installation of the precast beam on the shear wall. The grouting sleeve set in the lap joint allows the top and bottom reinforcement bars to be connected, ensuring that the strength meets the standards, improving the stability after construction, and solving the problem of difficult construction due to mutual collision of reinforcement bars. Attached Figure Description

[0013] Figure 1 This is a structural diagram showing the installation location of this utility model; Figure 2 This is a schematic diagram of the structure of the lead node of this utility model. Figure 3 This is a top view of the shear wall structure of this utility model; Figure 4 This is a schematic diagram of the precast beam structure viewed from the side. Figure 5 This is a structural schematic diagram showing the top cross-section of the precast beam of this utility model.

[0014] In the diagram: 1. Shear wall; 2. Lap joint; 3. Support; 4. Vertical reinforcement; 5. Reserved hole; 6. Extended reinforcement; 7. Horizontal reinforcement; 8. Stirrup; 9. Support reinforcement; 10. Reinforcing reinforcement; 11. Connecting reinforcement; 12. Extending reinforcement; 13. Grouting sleeve. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0016] Please see Figures 1 to 5 This utility model provides a technical solution: a precast concrete connecting beam and core tube connection structure, including a reserved hole 5 opened at the top of the core tube shear wall and a precast beam. The precast beam includes an overlapping part 2 and a supporting part 3. The reserved hole 5 is L-shaped and has vertical steel bars 4 embedded inside. The overlapping part 2 overlaps with the upper surface of the reserved hole 5.

[0017] The side wall of the support part 3 is on the same vertical line as the side wall of the shear wall 1. The lap part 2 is provided with a grouting sleeve 13. The bottom of the grouting sleeve 13 is sleeved with the top of the vertical steel bar 4. The upper surface of the grouting sleeve 13 is provided with an extension steel bar 6. The top of the extension steel bar 6 passes through the top of the lap part 2, and the extension steel bar 6 and the vertical steel bar 4 are located on the same axis.

[0018] The ends of the precast beams are equipped with embedded steel bars, which are tied and fixed to the internal steel bars of the shear wall. The precast beams and shear walls are connected by concrete pouring to fix the precast beams in the core tube shear wall.

[0019] During the pouring process, a notch is pre-reserved in shear wall 1 to form a pre-reserved hole 5 for the precast beam to overlap. This hole 5 allows the precast beam to be connected to shear wall 1, avoiding the influence of the pre-embedded reinforcing bars and stirrups 8 within shear wall 1 on the connection. The precast beam is supported at the corner of shear wall 1, providing support for the connecting corridor of the high-rise building and reducing swaying caused by environmental factors. The overlap 2 is connected to the pre-embedded vertical reinforcing bars 4 within shear wall 1 through an internal grouting sleeve 13. After connection, mortar is injected into the grouting sleeve to connect the upper reinforcing bar with the lower vertical reinforcing bar 4. To further enhance the overall connection strength, after the lap joint 2 is connected to the shear wall 1, the support part 3 on one side will be flush with the outer wall of the shear wall 1. At this time, the template is attached to the side wall of the shear wall 1 and then the pouring operation is carried out. The lap joint 2 and the shear wall 1 can be poured together to form an integral whole, avoiding relative movement between the two. Both the lap joint 2 and the support part 3 are prefabricated in the factory. The grouting sleeve inside is also pre-embedded in the lap joint 2, and the top of the grouting sleeve is also connected with steel bars, so that the lower steel bars can extend to the upper part and connect with the upper structure.

[0020] In this embodiment, as a preferred option, the internal reinforcement of the shear wall 1 includes horizontal reinforcement 7, and the outer surface of the vertical reinforcement 4 is fitted with stirrups 8 to constrain the vertical reinforcement 4. The horizontal reinforcement 7 is tied and fixed to the vertical reinforcement 4. Multiple support bars 9 are pre-embedded inside the support part 3. The support bars 9 are arranged longitudinally at intervals. Multiple horizontally arranged extension bars 12 are tied and fixed on the support bars 9. Reinforcing bars 10 are tied and fixed on the extension bars 12. Multiple reinforcing bars 10 are arranged at intervals along the extension direction of the extension bars 12, and the reinforcing bars 10 are arranged at intervals with the support bars 9. The pre-embedded reinforcement includes connecting bars 11 pre-embedded in the support part 3. The connecting bars 11 are tied and fixed to the reinforcing bars 10 inside the support part 3. The connecting bars 11 are tied and fixed to the internal reinforcement of the shear wall 1, including the horizontal reinforcement 7.

[0021] The horizontal reinforcing bars 7 and vertical reinforcing bars 4 form a mesh structure within the shear wall 1, increasing the strength of the shear wall 1. There are multiple vertical reinforcing bars 4, and stirrups 8 constrain the outer surface of the vertical reinforcing bars 4 to prevent deformation. Multiple stirrups 8 are staggered to further increase the constraint strength on the vertical reinforcing bars 4. The support bars 9 and reinforcing bars 10 in the support part 3 are both designed to increase strength. The precast beam is shaped like a boss. The support bars 9 fill the entire precast beam from top to bottom. The reinforcing bars 10 are located in the support part 3 near the lap joint 2 and inside the lap joint 2 to strengthen the end and reduce the possibility of end deformation. One end of the connecting reinforcing bar 11 is connected to the reinforcing bar 10, and the other end extends from the lap joint 2 and is connected to the reinforcing bars on the shear wall 1, so that the precast beam and the shear wall 1 form a whole, reducing swaying during the pouring process.

[0022] In this embodiment, as a preferred option, the length of the bottom extension steel bar 12 of the support part 3 is greater than the length of the precast beam, so that the extension steel bar 12 extends from the end of the lap part 2, and the middle part of the extension steel bar 12 is provided with a bend, so that the extension steel bar 12 gathers at the lap part 2 to form a steel cage.

[0023] The extended steel bar 12, the supporting steel bar 9, and the reinforcing steel bar 10 form a mesh structure. At the same time, the interior of the precast beam is also equipped with auxiliary steel bars that are perpendicular to the extended steel bar 12 and the supporting steel bar 9. The three work together to form a stable structure in the precast beam, preventing the precast beam from deforming. The bending part causes the extended steel bar 12 to gather at the lap joint 2, which increases the strength of the lap joint 2 and reduces the shaking of the lap joint 2. At the same time, it can avoid the grouting sleeve.

[0024] In this invention, the working steps of the device are as follows: 1. When pouring shear wall 1, reserve an area on the wall and cut off the vertical steel bars 4 that affect the installation in advance to avoid affecting the installation of the precast beam, forming a reserved hole 5. At the same time, ensure that the bottom of the reserved hole 5 is equipped with vertical steel bars 4 that can be connected to the precast beam. 2. Hoist the precast beam into place, align the grouting sleeve at the bottom of the precast beam with the vertical reinforcing bar 4 at the bottom of the reserved hole 5, insert the vertical reinforcing bar 4 into the grouting sleeve, and let the lap joint 2 rest on the outer wall of the shear wall 1. Then, grout is injected into the grouting sleeve to form the two reinforcing bars into a whole. After that, the grouting sleeve is used to connect the upper reinforcing bar of the shear wall 1 with the extended reinforcing bar 6, so that the precast beam and the shear wall 1 are firmly connected together. 3. After the steel bars are connected, install the formwork in place, then pour concrete inside the formwork to seal the reserved holes 5 on the shear wall 1, so that the shear wall 1 and the precast beam are connected as a whole.

[0025] The specific embodiments provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A precast concrete connecting beam and core tube structure, characterized in that: It includes a reserved hole (5) opened at the top of the core tube shear wall and a precast beam. The precast beam includes an overlap part (2) and a support part (3). The reserved hole (5) is L-shaped and has vertical steel bars (4) embedded inside. The overlap part (2) overlaps with the upper surface of the reserved hole (5). The side wall of the support (3) is on the same vertical line as the side wall of the shear wall (1). The lap joint (2) is provided with a grouting sleeve (13). The bottom of the grouting sleeve (13) is sleeved with the top of the vertical steel bar (4). The upper surface of the grouting sleeve (13) is provided with an extension steel bar (6). The top of the extension steel bar (6) passes through the top of the lap joint (2), and the extension steel bar (6) and the vertical steel bar (4) are located on the same axis. The ends of the precast beams are provided with embedded steel bars, which are tied and fixed to the internal steel bars of the shear wall. The precast beams and shear walls are connected by concrete pouring to fix the precast beams in the core tube shear wall.

2. The precast concrete connecting beam and core tube connection structure according to claim 1, characterized in that: The internal reinforcement of the shear wall (1) includes horizontal reinforcement (7), and the outer surface of the vertical reinforcement (4) is fitted with stirrups (8). The stirrups (8) are used to restrain the vertical reinforcement (4). The horizontal reinforcement (7) is tied and fixed to the vertical reinforcement (4).

3. The precast concrete connecting beam and core tube connection structure according to claim 2, characterized in that: The support part (3) has multiple support ribs (9) embedded inside. The support ribs (9) are arranged longitudinally at intervals. Multiple horizontally arranged extension steel bars (12) are tied to the support ribs (9). Reinforcing ribs (10) are tied to the extension steel bars (12). Multiple reinforcing ribs (10) are arranged at intervals along the extension direction of the extension steel bars (12), and the reinforcing ribs (10) are arranged at intervals with the support ribs (9).

4. The precast concrete connecting beam and core tube connection structure according to claim 3, characterized in that: The pre-embedded steel bars include connecting steel bars (11) pre-embedded in the support part (3), and the connecting steel bars (11) are tied and fixed to the reinforcing bars (10) inside the support part (3).

5. The precast concrete connecting beam and core tube connection structure according to claim 4, characterized in that: The connecting steel bars (11) are tied and fixed to the internal steel bars of the shear wall (1), including the transverse steel bars (7).

6. A precast concrete connecting beam and core tube connection structure according to any one of claims 1-4, characterized in that: The length of the bottom extension steel bar (12) of the support part (3) is greater than the length of the precast beam, so that the extension steel bar (12) extends from the end of the lap joint (2).

7. The precast concrete connecting beam and core tube connection structure according to claim 6, characterized in that: The extended steel bar (12) has a bent part in the middle so that the extended steel bar (12) gathers at the lap joint (2) to form a steel cage.

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