Supporting-free device for fabricated concrete structure

Abstract

The utility model discloses a support-free device for an assembly type concrete structure. The support-free device comprises a prefabricated upper column, a prefabricated lower column and a prefabricated beam, wherein the prefabricated upper column and the prefabricated lower column are vertically arranged; the prefabricated upper columns are connected through semi-grouting sleeves; support-free devices are arranged at the left and right ends of the prefabricated lower column; the supporting-free device is composed of H-shaped steel, a supporting plate, an adjustable supporting connecting plate, stiffening ribs and high-strength bolts. The horizontally-arranged precast beam is placed on the supporting connecting plate of the support-free device, the adjustable supporting connecting plate enables the beam to reach the preset elevation by adjusting the vertical height of the high-strength bolt, and construction errors are reduced. Temporary placement of the beam is achieved through the support-free device, so that support-free is achieved, after early strength concrete in a core area meets the strength requirement, the support-free device can be detached and reused, the field component installation efficiency is improved, the strength and safety reliability of a node area are improved, and the construction cost is reduced. And the bearing capacity and the anti-seismic property of the frame structure system are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of building engineering construction, and is a support-free device for assembled concrete structures. Background Art

[0002] Support-free prefabricated buildings are a construction method that can achieve rational resource utilization and environmental protection requirements. They can promote the development of the construction industry from extensive to intensive, improve the construction quality and safety of construction projects, and reduce energy consumption in the construction industry. Prefabricated concrete frame structures have the advantages of high production efficiency, short construction period, good product quality, low carbon and environmental protection, and have broad application prospects in construction projects.

[0003] Although precast concrete beam-column joints have many advantages in design and construction, they still have some disadvantages. These disadvantages mainly include: complex connections, which increase the complexity and difficulty of construction; high-precision positioning and control are required for construction accuracy to ensure accurate connection between beams and columns; stress concentration is easy to occur at the joints. If the design is improper or the construction quality is not high, it may cause damage at the joints, affecting the safety of the structure. In order to give full play to the advantages of concrete beam-column joints, these three problems need to be solved. Summary of the invention

[0004] Purpose of the invention: In view of the deficiencies in the prior art, the utility model provides a support-free device for assembled concrete structures.

[0005] The utility model provides the following technical solutions: a support-free device for assembled concrete structures, comprising vertically arranged prefabricated upper columns and prefabricated lower columns, horizontally arranged prefabricated beams, and a support-free device;

[0006] The prefabricated upper columns are connected by semi-grouting sleeves, and support-free devices are provided at the left and right ends of the prefabricated lower columns;

[0007] The prefabricated upper column and the prefabricated lower column are provided with column longitudinal reinforcement, the prefabricated beam is provided with beam longitudinal reinforcement, the column longitudinal reinforcement is connected to the core area of ​​the beam-column node through a semi-grouting sleeve, the prefabricated beam is temporarily supported by a support-free device, and the beam longitudinal reinforcement is connected in the core area of ​​the beam-column node through an adjustable mechanical sleeve;

[0008] The support-free device includes H-shaped steel, a support plate, an adjustable support connecting plate, a stiffening rib, a high-strength bolt 1 and a high-strength bolt 2; the support-free device is connected to the side of the prefabricated lower column through the high-strength bolt 1 and the support plate, and the support-free device is connected to the adjustable support connecting plate through the high-strength bolt 2, and the prefabricated beam is placed on the adjustable support connecting plate, and the adjustable support connecting plate adjusts the upper and lower heights of the high-strength bolt 2 to make the prefabricated beam reach a predetermined elevation, thereby reducing construction errors; the side edges of the stiffening rib are welded to the web of the H-shaped steel, and the upper and lower sides are flattened and tightened to the flanges of the H-shaped steel.

[0009] Preferably, the second high-strength bolt is an adjustable combined steel bar joint bolt.

[0010] Preferably, four high-strength bolt holes are reserved at the predetermined position of the prefabricated lower column, and the diameter of the high-strength bolt is 18 mm; four high-strength bolt holes are reserved at the predetermined position of the adjustable supporting connecting plate, and the diameter of the high-strength bolt is 16 mm.

[0011] Preferably, the high-strength bolts 1 and 2 are high-strength bolts with a strength of grade 8.8.

[0012] Preferably, the flange of the H-shaped steel is made of 14 mm thick steel plate, the web is made of 10 mm thick steel plate, the support plate and the adjustable support connecting plate are made of 16 mm and 12 mm thick steel plates respectively, and the steel material type is Q235B steel plate.

[0013] During the on-site installation stage of the utility model, the support-free device is connected to the high-strength bolts through the bolt holes reserved on the concrete column. After the early-strength concrete in the core area meets the strength requirements, the four high-strength bolts reserved in advance on the prefabricated lower column can be removed, and the support-free device can be disassembled for reuse.

[0014] Beneficial effects of the utility model:

[0015] The beam-column node of the utility model achieves support-free by mechanically connecting the frame beams and column components with the core area and using a support-free device to realize temporary shelving of the beams. After the early-strength concrete in the core area meets the strength requirements, the support-free device can be disassembled and reused, which not only improves the efficiency of on-site component installation and construction accuracy, but also improves the strength and safety reliability of the node area, and enhances the bearing capacity and seismic performance of the frame structure system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the support-free prefabricated beam-column node structure provided by the utility model;

[0017] Figure 2 It is a structural schematic diagram of the prefabricated upper column shown in the utility model;

[0018] Figure 3 It is a structural schematic diagram of the prefabricated lower column and the support-free device shown in the utility model;

[0019] in:

[0020] 1. Support-free device; 2. Prefabricated beam; 3. Prefabricated upper column; 4. Adjustable mechanical sleeve; 5. Beam longitudinal reinforcement; 6. Column longitudinal reinforcement; 7. High-strength bolt 1; 8. Support plate; 9. Adjustable support connecting plate; 10. Stiffening rib; 11. High-strength bolt 2. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] Please refer to Figure 1-3 As shown, a support-free device for assembled concrete structure includes a prefabricated upper column 3, a prefabricated beam 2, a support-free device 1, beam longitudinal reinforcement 5 and column longitudinal reinforcement 6.

[0023] Please refer to Figure 3 The support-free device 1 connects the support plate 8 with the prefabricated lower column through high-strength bolts 7, connects the adjustable support connecting plate 9 with the support-free device 1 through high-strength bolts 11, and places the prefabricated beam 2 on the adjustable support connecting plate 9.

[0024] Please refer to Figure 3 The side of the stiffening rib 10 is welded to the web of the H-shaped steel, and the upper and lower sides are flattened and tightened to the flange of the H-shaped steel.

[0025] Please refer to Figure 3 The bolts are high-strength bolts with a strength of 8.8 and a diameter of 18mm. The bolts are high-strength bolts with a strength of 8.8 and a diameter of 16mm.

[0026] In this embodiment, the column longitudinal reinforcement 6 is connected to the core area through a semi-grouting sleeve, the prefabricated beam 2 is temporarily supported by the support-free device 1, and the core area of ​​the beam longitudinal reinforcement 5 is connected by an adjustable mechanical sleeve 4, and early-strength concrete is poured later, which improves the node bearing capacity, enhances the integrity and seismic performance of the node, improves accuracy, facilitates construction, reduces on-site workload, and improves construction efficiency.

[0027] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A support-free device for assembled concrete structures, characterized in that: It includes vertically arranged prefabricated upper columns and prefabricated lower columns, horizontally arranged prefabricated beams, and support-free devices; The prefabricated upper columns are connected by semi-grouting sleeves, and support-free devices are provided at the left and right ends of the prefabricated lower columns; The prefabricated upper column and the prefabricated lower column are provided with column longitudinal reinforcement, the prefabricated beam is provided with beam longitudinal reinforcement, the column longitudinal reinforcement is connected to the core area of ​​the beam-column node through a semi-grouting sleeve, the prefabricated beam is temporarily supported by a support-free device, and the beam longitudinal reinforcement is connected in the core area of ​​the beam-column node through an adjustable mechanical sleeve; The support-free device includes H-shaped steel, a support plate, an adjustable support connecting plate, a stiffening rib, a high-strength bolt 1 and a high-strength bolt 2; the support-free device is connected to the side of the prefabricated lower column through the high-strength bolt 1 and the support plate, and the support-free device is connected to the adjustable support connecting plate through the high-strength bolt 2, and the prefabricated beam is placed on the adjustable support connecting plate, and the adjustable support connecting plate adjusts the upper and lower heights of the high-strength bolt 2 to make the prefabricated beam reach a predetermined elevation; the side of the stiffening rib is welded to the web of the H-shaped steel, and the upper and lower sides are flattened and tightened with the flanges of the H-shaped steel.

2. A support-free device for assembled concrete structures according to claim 1, characterized in that: The second high-strength bolt is an adjustable combined steel bar joint bolt.

3. The support-free device for assembled concrete structure according to claim 1, characterized in that: The prefabricated lower column has four holes reserved for high-strength bolts at the predetermined position, and the diameter of the high-strength bolts is 18 mm; the adjustable supporting connecting plate has four holes reserved for high-strength bolts at the predetermined position, and the diameter of the high-strength bolts is 16 mm.

4. The support-free device for assembled concrete structure according to claim 1, characterized in that: The high-strength bolts 1 and 2 are high-strength bolts with a strength of grade 8.

8.

5. The support-free device for assembled concrete structure according to claim 1, characterized in that: The flange of the H-shaped steel is made of 14mm thick steel plate, the web is made of 10mm thick steel plate, the support plate and the adjustable support connecting plate are made of 16mm and 12mm thick steel plates respectively, and the steel type is Q235B steel plate.

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