Connecting structure of concrete modular staircase and concrete bracket

Abstract

The utility model discloses a concrete modular stair and concrete corbel connecting structure which comprises a prefabricated stair and a concrete corbel, a pin hole is reserved in the top connecting position of the prefabricated stair, the concrete corbel and a concrete module are poured together, and bent anchor steel bars are embedded in the concrete corbel. The bottom end part of the bent anchor steel bar is embedded in the concrete bracket, the top end part of the bent anchor steel bar upwards protrudes out of the upper surface of the concrete bracket, the bent anchor steel bar is inserted into the pin hole, and a gap between the bent anchor steel bar and the pin hole is densely filled with a high-strength grouting material. The stair module prefabricated in a factory is adopted, it is guaranteed that the prefabricated stair and the concrete corbel can be accurately in butt joint during field installation, complexity of field processing is reduced, and the stress characteristic of the concrete corbel and the load requirement of the prefabricated stair can be met by adopting a grout anchor connection mode. Therefore, the connecting structure provided by the utility model is short in construction period, low in construction difficulty and good in structural stability.

Description

Technical Field

[0001] The utility model belongs to the field of modular buildings, and particularly relates to a connection structure between a concrete modular staircase and a concrete corbel. Background Art

[0002] With the acceleration of building construction and the enhancement of environmental protection awareness, the construction industry is shifting towards the concepts of high efficiency and environmental protection. As a new type of industrialized building method, modular buildings have received increasing attention because they can improve construction efficiency, shorten the construction period, and reduce the impact on the environment. However, there are still some problems in the existing modular building connection technologies, especially in the connection of staircase functions in modular concrete buildings.

[0003] Currently, the staircase needs to be formwork-supported on-site and then poured. A large amount of labor is required during construction, and processes such as formwork removal and curing are also relatively time-consuming. In addition, the construction process and the generated waste also have a greater impact on the surrounding environment. Moreover, the quality control of on-site pouring is relatively difficult, which may lead to insufficient connection strength and affect the overall stability of the building. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a connection structure between a concrete modular staircase and a concrete corbel, which can solve the problems of long construction period, insufficient structural stability, and high construction difficulty existing in the connection of traditional concrete staircases by means of on-site pouring and steel structures.

[0005] The utility model is realized as follows: A connection structure between a concrete modular staircase and a concrete corbel includes a precast staircase and a concrete corbel. Pin holes are reserved at the top connection of the precast staircase. The concrete corbel is cast together with the concrete module and protrudes from the inner side of the concrete module. Bent anchor bars are embedded in the concrete corbel. The bottom part of the bent anchor bars is buried in the concrete corbel, and the top part thereof protrudes upward from the upper surface of the concrete corbel. The positions and quantities of the bent anchor bars match the positions and quantities of the pin holes. The bent anchor bars are inserted into the pin holes, and the gaps between the bent anchor bars and the pin holes are densely filled with high-strength grouting material.

[0006] Further, the top connection of the precast staircase and the top surface of the concrete corbel are connected through a high-strength bedding mortar layer.

[0007] Further, a rubber gasket for leveling is also clamped between the high-strength bedding mortar layer and the concrete corbel.

[0008] Further, the bent anchor bar has a horizontal section and a vertical section. The horizontal section is embedded in the concrete corbel and the concrete module, and the bottom end of the vertical section is embedded in the concrete corbel, and its top end protrudes upward from the upper surface of the concrete corbel and is inserted into the dowel hole.

[0009] Further, the top position of the dowel hole is enlarged to form a step; the bent anchor bar forms a snap structure with the step by sleeving a gasket, and the bent anchor bar is locked in the dowel hole by a fixing nut.

[0010] Further, the space above the gasket in the dowel hole is filled with slightly expanding cement mortar.

[0011] Further, a gap is reserved between the outer side surface of the top connection of the precast staircase and the concrete module. A cavity is left at the bottom of the gap, and a PE rod is used to plug the joint at the top, and sealant is provided. The building surface layer is leveled with cement mortar.

[0012] The utility model adopts a factory precast staircase module to ensure accurate docking of the precast staircase and the concrete corbel during on-site installation, reducing the complexity of on-site treatment; and the grouted anchor connection method takes into account the force characteristics of the concrete corbel and the load requirements of the precast staircase, and can ensure the stability of both under different usage conditions. Compared with the traditional staircase construction method, the utility model has the following beneficial effects:

[0013] 1. Improve the stability of the building structure: Ensure the firm connection between the concrete modular staircase and the concrete corbel, which can bear the use load of the staircase and various external forces, and reduce the risk of problems such as loosening and cracking at the connection part. The grouted anchor connection method can provide a reliable connection, enhance the resistance of the building under various load actions, and reduce the structural safety hazards caused by insecure connections.

[0014] 2. Adapt to the characteristics of modular buildings: The characteristics of modular building components prefabricated in factories and assembled on-site require an efficient and convenient connection method to achieve the connection between module components. The grouted anchor connection method can be quickly constructed on-site, reducing construction time and cost, while ensuring the connection quality, meeting the production and construction requirements of modular buildings.

[0015] 3. Enhance seismic performance: In areas where natural disasters such as earthquakes occur frequently, the seismic performance of buildings is crucial. The grouted anchor connection can effectively transmit seismic forces, enabling the foundation and the modular building to work together, improving the overall seismic capacity of the building, and ensuring the safety of the building.

[0016] 4. Improve the durability of buildings: Good connection methods can reduce the erosion of external factors such as moisture and air on the connection parts, and extend the service life of buildings. Grout anchor connection can form a sealed connection interface, reduce the risk of corrosion and damage, and improve the durability of buildings. Brief Description of the Drawings

[0017] Figure 1 is a schematic plan view of the connection structure between a concrete modular staircase and a concrete corbel provided by an embodiment of the present utility model;

[0018] Figure 2 is a schematic elevation view of the connection structure between a concrete modular staircase and a concrete corbel provided by an embodiment of the present utility model;

[0019] Figure 3 is Figure 2 an enlarged view of area A in

[0020] Figure 4 is a schematic structural view of a concrete module and a concrete corbel provided by an embodiment of the present utility model;

[0021] Figure 5 is a schematic structural view after the precast staircase and the concrete corbel are assembled provided by an embodiment of the present utility model. Detailed Description of the Preferred Embodiments

[0022] In order to make the objectives, technical solutions and advantages of the present utility model more comprehensible, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. These are only for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; in addition, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Please refer to Figures 1 to 3 , which shows a connection structure between a precast concrete staircase and a concrete corbel provided in this embodiment. It includes a precast staircase 1 and a concrete corbel 2. A pin hole 11 is reserved at the top connection of the precast staircase 1. The concrete corbel 2 is cast together with the concrete module 3 and protrudes from the inner side of the concrete module 3; Bent anchor bars 4 are embedded in the concrete corbel 2. The bottom part of the bent anchor bars 4 is buried in the concrete corbel 2, and the top part thereof protrudes upward from the upper surface of the concrete corbel 2 (as Figure 4 shown); The position and quantity of the bent anchor bars 4 match the position and quantity of the pin holes 11; Please refer to Figure 5 together. When the precast staircase 1 and the concrete corbel 2 are assembled, the bent anchor bars 4 are inserted into the pin holes 11, and the gap between the bent anchor bars 4 and the pin holes 11 is densely filled with high-strength grouting material 5.

[0025] The top connection of the precast staircase 1 is connected to the top surface of the concrete corbel 2 through a high-strength seating mortar layer 6, and a leveling rubber gasket 7 is also sandwiched between the high-strength seating mortar layer 6 and the concrete corbel 2.

[0026] The bent anchor bars 4 have a horizontal section and a vertical section. The horizontal section is buried in the concrete corbel 2 and the concrete module 3, and the bottom end of the vertical section is buried in the concrete corbel 2, and the top end thereof protrudes upward from the upper surface of the concrete corbel 2 and is inserted into the pin hole 11.

[0027] Refer to Figure 3 again. The top position of the pin hole 11 is enlarged to form a step; The bent anchor bars 4 form a snap structure with the step by sleeving a gasket 8, and the bent anchor bars 4 are locked in the pin hole 11 through a fixing nut 9. The space above the gasket 8 in the pin hole 11 is filled with slightly expanding cement mortar 10.

[0028] A gap is reserved between the outer side of the top connection of the precast staircase 1 and the concrete module 3. There is a cavity at the bottom of the gap, and the top is plugged with a PE rod a and provided with a sealant b. The building surface layer is leveled with cement mortar.

[0029] To make the technical solution of this embodiment clearer, the assembly process of the precast staircase 1 and the concrete corbel 2 will be described in detail below:

[0030] When the precast staircase 1 is processed in the factory, pin holes are reserved in advance according to the drawings;

[0031] The structural steel bars of the concrete module 3 and the concrete corbel 2 are connected and tied. The reserved bent anchor bars 4 in the concrete corbel 2 and the reserved building wall steel bars of the module meet the requirement of 15D for the steel bar diameter;

[0032] The precast staircase 1 is placed at the hoisting position by a special transport vehicle. After the crane that meets the technical tonnage hoists the precast staircase 1 to the position, the operating workers steady the precast staircase 1 and slowly lower the precast staircase 1 according to the horizontal control line, align it with the bent anchor reinforcement 4, and install it to the designed position;

[0033] Before the hook of the precast staircase 1 is removed during hoisting, a rubber gasket 7 is used for local flatness adjustment between the precast staircase 1 and the concrete corbel 2. After leveling, high-strength sitting mortar is used for sitting and fixing;

[0034] The gap between the bent anchor reinforcement 4 and the dowel hole 11 is filled with high-strength grouting material 5 to the enlarged position at the top of the dowel hole 11. The dowel hole 11 of the precast staircase 1 is fixed with a gasket 8 and a fixing nut 9,

[0035] When installing the precast staircase 1, a 20 - 30MM gap is reserved with the concrete module 3. There is a cavity in part of the gap, and a PE rod a is used for joint caulking, and sealant b is filled. The building surface layer is leveled with cement mortar.

[0036] This embodiment uses a factory precast staircase to ensure that the precast staircase 1 and the concrete corbel 2 can be accurately docked during on-site installation, reducing the complexity of on-site treatment; and the connection method of grouting and anchoring takes into account the force-bearing characteristics of the concrete corbel 2 and the load requirements of the precast staircase 1, and can ensure the stability of both under different use conditions. Compared with the traditional staircase construction method, this embodiment has the following beneficial effects:

[0037] 1. Improve the stability of the building structure: Ensure the firm connection between the concrete modular staircase and the concrete corbel, be able to withstand the use load of the staircase and various external forces, and reduce the risk of problems such as loosening and cracking at the connection part. The grouting and anchoring connection method can provide a reliable connection, enhance the resistance of the building under various load actions, and reduce the structural safety hazards caused by insecure connection.

[0038] 2. Adapt to the characteristics of modular buildings: The characteristics of modular building components being precast in the factory and assembled on-site require an efficient and convenient connection method to achieve the connection between module components. The grouting and anchoring connection method can be quickly constructed on-site, reducing construction time and cost, while ensuring the connection quality, meeting the production and construction requirements of modular buildings.

[0039] 3. Enhance seismic performance: In areas where natural disasters such as earthquakes occur frequently, the seismic performance of buildings is crucial. The grouting and anchoring connection can effectively transmit seismic forces, enable the staircase components and the modular building to share forces together, improve the overall seismic capacity of the building, and ensure the safety of the building.

[0040] 4. Improve the durability of buildings: Good connection methods can reduce the erosion of external factors such as moisture and air on the connection parts, and extend the service life of buildings. Grout anchor connection can form a sealed connection interface, reduce the risk of corrosion and damage, and improve the durability of buildings.

[0041] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A connecting structure between a concrete modular staircase and a concrete corbel, characterized in that It includes a precast staircase and a concrete corbel. Pin holes are reserved at the top connection of the precast staircase. The concrete corbel is cast together with the concrete module and protrudes from the inner side of the concrete module. Bent anchor bars are embedded in the concrete corbel. The bottom part of the bent anchor bars is buried in the concrete corbel, and the top part thereof protrudes upward from the upper surface of the concrete corbel. The positions and quantities of the bent anchor bars match the positions and quantities of the pin holes. The bent anchor bars are inserted into the pin holes, and the gaps between the bent anchor bars and the pin holes are densely filled with high-strength grouting material.

2. The connection structure according to claim 1, wherein The top connection of the precast staircase is connected to the top surface of the concrete corbel through a high-strength bedding mortar layer.

3. The connection structure according to claim 2, characterized in that, A leveling rubber gasket is also sandwiched between the high-strength bedding mortar layer and the concrete corbel.

4. The connection structure according to claim 1, characterized in that, The bent anchor bars have a horizontal section and a vertical section. The horizontal section is buried in the concrete corbel and the concrete module. The bottom end of the vertical section is buried in the concrete corbel, and the top end thereof protrudes upward from the upper surface of the concrete corbel and is inserted into the pin hole.

5. The connection structure according to claim 4, characterized in that The top position of the pin hole is enlarged to form a step. The bent anchor bar forms a snap structure with the step through a sleeved gasket, and the bent anchor bar is locked in the pin hole through a fixing nut.

6. The connection structure according to claim 5, wherein The space above the gasket in the pin hole is filled with slightly expanding cement mortar.

7. The connection structure according to claim 1, characterized in that A gap is reserved between the outer side of the top connection of the precast staircase and the concrete module. A cavity is left at the bottom of the gap, and a PE rod is used for plugging the seam at the top, and sealant is provided. The building surface layer is leveled with cement mortar.

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