A new floor and existing wall key type connection combined structure

Abstract

The utility model relates to a kind of newly added floor and existing wall key type connection combined structure, including newly added floor structure and existing building wall, newly added floor structure is located between multiple existing building wall, and existing building wall and newly added floor structure are connected by reinforcing bar key, the inside of newly added floor structure is provided with multiple hollow box, newly added floor structure includes multiple rib beam reinforcing bars, multiple rib beam reinforcing bars are divided into X-axis beam reinforcing bar and Y-axis beam reinforcing bar, and reserved space is formed between X-axis beam reinforcing bar and Y-axis beam reinforcing bar, hollow box is installed in reserved space inside, and cast-in-place concrete slab body is formed with the outside of rib beam reinforcing bar and hollow box by pouring molding.The utility model can have the advantages of retaining historical building style, effectively reducing structural dead weight, reducing the pressure on original structure, improving the load-carrying capacity and seismic performance of floor system, and facilitating and quick construction.

Description

Technical Field

[0001] This utility model belongs to the field of reinforcement and renovation technology of historical buildings, specifically involving a pin-key connection combination structure between a new floor slab and an existing wall. Background Technology

[0002] Over time, many historical buildings have suffered structural damage and functional degradation due to natural aging and human-caused destruction. Effective renovation measures are needed to protect these precious historical heritages. Because historical buildings are important carriers of cultural heritage, their renovation faces the dual challenges of ensuring structural safety and preserving their original appearance. Traditional reinforcement techniques mainly have the following shortcomings:

[0003] 1. Significant structural damage: Conventional cast-in-place concrete reinforcement requires the removal of exterior facade components or the excavation of walls, resulting in irreversible damage to historical textures (such as brick carvings, finishes, etc.).

[0004] 2. Excessive self-weight load: Traditional solid floor slabs have excessive self-weight, and the original foundation of historical buildings is not strong enough, which can easily lead to settlement cracks;

[0005] There is an urgent need for a renovation technology that meets two objectives: ① zero visual intervention on the facade (protecting the historical information layer); ② minimal increase in structural self-weight (adapting to fragile foundations). Utility Model Content

[0006] The purpose of this utility model is to provide a pin-key connection structure between the new floor slab and the existing wall, which has the advantages of preserving the historical architectural style, effectively reducing the structural self-weight, reducing the pressure on the original structure, improving the load-bearing capacity and seismic performance of the floor, and being simple and quick to construct.

[0007] The specific technical solution adopted by this utility model is as follows:

[0008] A new floor slab and existing wall pin-key connection combination structure includes a new floor slab structure and existing building walls. The new floor slab structure is located between multiple existing building walls. The existing building walls and the new floor slab structure are connected by steel bar pin keys. The interior of the new floor slab structure is provided with multiple hollow boxes.

[0009] Furthermore, the existing building wall has a pin positioning hole on its side, the steel bar pin is installed inside the pin positioning hole, and the pin positioning hole is filled with post-cast concrete.

[0010] Furthermore, the newly added floor slab structure includes multiple reinforcing ribs, with the reinforcing bars fixedly connected to the reinforcing ribs by key pins. The multiple reinforcing ribs are divided into X-axis reinforcing bars and Y-axis reinforcing bars, with a reserved space formed between the X-axis reinforcing bars and the Y-axis reinforcing bars. The hollow box is installed inside the reserved space, and a cast-in-place concrete slab is cast on the outside of the reinforcing ribs and the hollow box.

[0011] Furthermore, an upper steel mesh is installed on the upper side of the assembly of the rib beam reinforcement and the hollow box, and a lower steel mesh is installed on the lower side of the assembly of the rib beam reinforcement and the hollow box.

[0012] Furthermore, the hollow box body includes a box panel, the inside of which is provided with a hollow cavity, and the periphery of the box panel is provided with multiple through holes, the inside of which is provided with connecting ribs.

[0013] Furthermore, a sleeve is installed inside the through hole, and the connecting rib is fixedly connected to the sleeve. The combined length of the sleeve and the connecting rib is less than the opening depth of the through hole.

[0014] The technical effects achieved by this utility model are as follows:

[0015] This utility model discloses a pin-key connection structure between a newly added floor slab and existing walls. Through the combination of the new floor slab structure and steel pins, it offers advantages such as preserving the historical architectural style, effectively reducing the structural weight, decreasing pressure on the original structure, improving the floor's load-bearing capacity and seismic performance, and facilitating simple and quick construction. It has broad application prospects in the renovation, alteration, and reinforcement of historical buildings.

[0016] This utility model achieves zero-damage protection of historical features through a combination structure of hollow box casting and reinforced steel pins: the intervention rate on the facade is reduced to 0%, and a reuse construction scheme is adopted, that is, the reinforced steel pins are set in the grooves of the original wooden beams of the building, avoiding structural damage to the original walls. By precisely utilizing the reserved space of the existing structure, a rigid connection between the old and new structures is achieved, and a stable force transmission system is built in the historical building, ensuring the overall stability of the building structure under complex stress environments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a partial structural schematic diagram of the present invention;

[0019] Figure 3 This is a side view of the cross-sectional structure of this utility model;

[0020] Figure 4 This is a utility model Figure 3 A magnified view of a section at point A in the middle;

[0021] Figure 5 This is a schematic diagram of the internal structure of the newly added floor slab structure in this utility model;

[0022] Figure 6 This is a cross-sectional structural diagram of the present invention;

[0023] Figure 7 This is a schematic diagram of one structure of the hollow box body of this utility model;

[0024] Figure 8 This is a cross-sectional schematic diagram of one structure of the hollow box body of this utility model;

[0025] Figure 9 This is a flowchart of the construction steps for this utility model.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Existing building walls; 2. New floor slab structure; 3. Reinforcing bar key; 4. Lower reinforcing mesh; 5. Rib beam reinforcement; 6. Upper reinforcing mesh; 7. Hollow box; 8. Cast-in-place concrete slab; 9. Key positioning holes; 10. Post-cast concrete; 11. Bottom formwork; 12. Box slab; 13. Hollow cavity; 14. Through hole; 15. Sleeve; 16. Connecting bars. Detailed Implementation

[0028] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0029] Implementation method one: such as Figures 1-9 As shown, a pin-key connection structure between the newly added floor slab and the existing wall is suitable for reinforcement and renovation projects of various historical buildings, especially for historical buildings that need to retain their original facade.

[0030] The new floor slab and existing wall pin-key connection combination structure includes the new floor slab structure 2 and the existing building wall 1 of the historical building. The new floor slab structure 2 is located between multiple existing building walls 1. The existing building walls 1 and the new floor slab structure 2 are connected by steel pins 3. The construction operation of steel pins 3 is simple and can greatly shorten the construction cycle.

[0031] The newly added floor slab structure 2 has multiple hollow boxes 7 inside. Through the newly added floor slab structure 2 and hollow boxes 7, the interior of the historical building can be effectively reinforced, and the exterior facade can be effectively preserved. This maximizes the preservation of the authenticity, integrity and historical value of the historical building, while ensuring its structural safety and sustainable use. It improves structural stability and is simple and quick to construct. The hollow floor slab structure formed by the newly added floor slab structure 2 has the advantages of light weight, high rigidity and good seismic performance. It can effectively reduce the self-weight of the structure, reduce the pressure on the original structure, and improve the load-bearing capacity and seismic performance of the floor slab. It has broad application prospects in the renovation, transformation and reinforcement of historical buildings.

[0032] At this point, by adding a new floor slab structure 2 to the existing building wall 1, the internal structure of the historical building can be reinforced and repaired. The steel reinforcement pins 3 can be concealed within the structure through existing wooden beam recesses, without affecting the aesthetics of the facade. The steel reinforcement pins 3 possess strong shear resistance, good tensile strength, and reliable anchoring performance, effectively transferring shear force and resisting tensile forces within the structure. They enhance the connection strength between the old and new structures, forming a robust connection within the historical building's structure, ensuring the stability of the building structure under various stress conditions, improving the overall integrity and stability of the structure, and increasing its load-bearing capacity.

[0033] Among them, the newly added floor slab structure 2 has the following advantages compared with the traditional solid floor slab:

[0034] 1. The newly added floor slab structure 2 is a precast component. Precast products can be mass-produced in the factory, the construction process is simple, the on-site installation speed is fast, and the construction speed is fast.

[0035] 2. It can significantly reduce the structural weight and improve the building's seismic performance;

[0036] 3. Hollow core slabs have high rigidity and load-bearing capacity, enabling larger spans and creating more open spaces to meet the needs of different functions.

[0037] 4. No lower beams, thus increasing the clear height between floors: enhancing spatial flexibility and the flexibility of building pipeline layout, and reducing pipeline detours.

[0038] Meanwhile, the newly added hollow box 7 can be made of at least one of concrete, clay, shale, coal gangue and fly ash, which has good sound insulation and heat insulation properties and can effectively improve the building's functionality.

[0039] Implementation Method Two: (e.g.) Figures 3-4 As shown, a key positioning hole 9 is provided on the side of the existing building wall 1. The key positioning hole 9 can be a hole opened later in the existing building wall 1, or it can be a wooden beam groove of the original building. When using a wooden beam groove, structural damage to the original wall can be reduced.

[0040] The reinforcing bar pin 3 is installed inside the pin positioning hole 9. The pin positioning hole 9 is filled with post-cast concrete 10. The post-cast concrete 10 fixes the pin positioning hole 9 inside the pin positioning hole 9, thereby forming a relatively stable connection.

[0041] Implementation Method 3: For example Figures 2-5 As shown, the newly added floor slab structure 2 includes multiple reinforcing steel bars 5. The addition of reinforcing steel bars 5 can improve the tensile and seismic performance of the newly added floor slab structure 2. Reinforcing bar pins 3 are fixedly connected to the reinforcing steel bars 5, and the fixing method can be welding or binding. The multiple reinforcing steel bars 5 are divided into X-axis beam bars and Y-axis beam bars, and a reserved space is formed between the X-axis beam bars and the Y-axis beam bars. The hollow box body 7 is installed inside the reserved space. An upper reinforcing mesh is installed on the upper side of the combination of reinforcing steel bars 5 and hollow box body 7. 6. A lower steel mesh 4 is installed on the lower side of the combination of the rib beam reinforcement 5 and the hollow box 7. A cast-in-place concrete slab 8 is cast on the outside of the lower steel mesh 4, the rib beam reinforcement 5, the upper steel mesh 6 and the hollow box 7. After the cast-in-place concrete slab 8 is cast, the lower steel mesh 4 and the upper steel mesh 6 can limit the hollow box 7, so that the newly added floor slab structure 2 and the hollow box 7 form a relatively stable connection structure, thereby improving the connection stability between the newly added floor slab structure 2 and the hollow box 7.

[0042] Implementation Method 4: The hollow box body 7 is a rectangular hollow slab or hollow floor slab. The application of hollow floor slabs can significantly reduce the structural self-weight; the absence of underbeams increases the clear height between floors; it enhances spatial flexibility and the flexibility of building pipeline layout, reducing pipeline detours.

[0043] Implementation Method 5: (e.g.) Figures 2-3 and Figures 6-7 As shown, the hollow box body 7 includes a box panel 12, with a hollow cavity 13 inside the box panel 12. Multiple through holes 14 are opened on the periphery of the box panel 12. A sleeve 15 is installed inside the through hole 14, and a connecting rib 16 is fixedly connected to the sleeve 15. The combined length of the sleeve 15 and the connecting rib 16 is less than the opening depth of the through hole 14. When installing the hollow box body 7, the combined structure of the sleeve 15 and the connecting rib 16 can be placed inside the through hole 14. Then, the box panel 12 is installed inside the reserved space, and the connecting rib 16 is pulled to the rib beam reinforcement 5. This can improve the connection stability between the hollow box body 7 and the cast-in-place concrete slab 8. In addition, the sleeve 15 can seal the opening of the through hole 14, reducing the phenomenon of concrete entering the box panel 12 and increasing the weight of the box panel 12.

[0044] like Figures 8-9 As shown in the table below, a construction process for a pin-key connection structure between a new floor slab and an existing wall is described. The materials and equipment used in the construction are listed in the table below:

[0045]

[0046] A construction process for a new floor slab and existing wall pin-key connection composite structure includes the following steps:

[0047] Step 1: Template Installation

[0048] When installing the bottom formwork 11, it is necessary to ensure the flatness and verticality of the bottom formwork 11, and that the support system of the bottom formwork 11 is firm and reliable, so as to ensure that it can withstand the weight of the concrete, the construction load and the molding quality after the concrete is poured.

[0049] Step 2: Binding of the lower steel mesh 4 and the rib beam reinforcement 5.

[0050] According to the design requirements of the drawings, the lower steel mesh 4 and the rib beam steel bars 5 shall be tied with steel bars. The specifications, models and quantities of steel bars shall meet the design requirements, and the tying of steel bars shall be firm and reliable.

[0051] Step 3: Installation of the hollow housing 7

[0052] The hollow box 7 should be installed in accordance with the design requirements to ensure that the position of the hollow box 7 is accurate and the arrangement is neat.

[0053] The connections between the hollow boxes 7 must be firm and reliable to prevent displacement and deformation during concrete pouring.

[0054] Step 4: Installation of Rebar Pin 3

[0055] According to the design requirements, the key points were identified on the original structure of the historical building and cleaned and roughened to increase the bonding strength between the old and new concrete.

[0056] The specifications, model and positioning of the reinforcing bar pin 3 must meet the design requirements, and the installation of the reinforcing bar pin 3 must be firm and reliable.

[0057] Step 5: Tying the upper reinforcing bars

[0058] After the hollow box 7 is installed as required, the steel mesh 6 is tied. During the process of tying the steel mesh 6, care should be taken to protect the hollow box 7 and avoid damaging it.

[0059] Step Six: Concrete Pouring

[0060] The concrete mix proportions must meet the design requirements, and the concrete pouring must be continuous to avoid cold joints.

[0061] During the concrete pouring process, appropriate vibration methods should be used to ensure the compactness of the concrete.

[0062] The quality control requirements during construction are as follows:

[0063] The construction quality of the hollow box body 7 and the steel reinforcement pins 3 must meet the design requirements and relevant specifications and standards.

[0064] Strengthen the quality control of raw materials, inspect and test incoming materials to ensure that the quality of materials meets the requirements.

[0065] Strictly control the quality during the construction process, and strengthen quality control over key aspects such as formwork installation, hollow box installation, rebar tying, and concrete pouring.

[0066] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A keyed connection structure between a new floor slab and an existing wall, characterized in that: It includes a new floor slab structure (2) and existing building walls (1). The new floor slab structure (2) is located between multiple existing building walls (1). The existing building walls (1) and the new floor slab structure (2) are connected by steel bar pins (3). Multiple hollow boxes (7) are provided inside the new floor slab structure (2).

2. The pin-key connection structure between the new floor slab and the existing wall as described in claim 1, characterized in that: The existing building wall (1) has a key positioning hole (9) on its side. The steel bar key (3) is installed inside the key positioning hole (9). The key positioning hole (9) is filled with post-cast concrete (10).

3. The pin-key connection structure between the new floor slab and the existing wall as described in claim 2, characterized in that: The pin positioning hole (9) is a groove for the wooden beam.

4. The pin-key connection structure between the new floor slab and the existing wall as described in claim 1, characterized in that: The newly added floor slab structure (2) includes multiple rib beams (5), and the steel bar pins (3) are fixedly connected to the rib beams (5). The multiple rib beams (5) are divided into X-axis beams and Y-axis beams. A reserved space is formed between the X-axis beams and Y-axis beams. The hollow box (7) is installed inside the reserved space. A cast-in-place concrete slab (8) is cast on the outside of the rib beams (5) and the hollow box (7).

5. The pin-key connection structure between the new floor slab and the existing wall as described in claim 4, characterized in that: An upper steel mesh (6) is installed on the upper side of the combination of the rib beam (5) and the hollow box (7), and a lower steel mesh (4) is installed on the lower side of the combination of the rib beam (5) and the hollow box (7).

6. The pin-key connection structure between the new floor slab and the existing wall as described in claim 1, characterized in that: The hollow box (7) includes a box plate (12), the inside of which is a hollow cavity (13), and the periphery of the box plate (12) is provided with multiple through holes (14), and connecting ribs (16) are installed inside the through holes (14).

7. The pin-key connection structure between a new floor slab and an existing wall as described in claim 6, characterized in that: A sleeve (15) is installed inside the through hole (14), and the connecting rib (16) is fixedly connected to the sleeve (15). The combined length of the sleeve (15) and the connecting rib (16) is less than the opening depth of the through hole (14).

8. The pin-key connection structure between the new floor slab and the existing wall as described in claim 1, characterized in that: The hollow box (7) is made of at least one of concrete, clay, shale, coal gangue and fly ash.

Images