Prefabricated concrete canopy and connecting joint of prefabricated concrete canopy and modular structure main body

Abstract

The invention discloses a prefabricated concrete canopy and a connecting node of the prefabricated concrete canopy and a modular structure main body, the prefabricated concrete canopy comprises a bottom plate, a side turning edge and a vertical turning edge, the side turning edge is provided with an anchoring steel bar, the connecting node comprises the prefabricated concrete canopy and the modular structure main body, the modular structure main body is provided with an anchoring hole site, and the modular structure main body is provided with an anchoring hole site. One end of the anchoring steel bar extends into the anchoring hole position to be connected with the modular structure body. The canopy is designed to be a beam type stress component, the bottom plate of the canopy is designed to be a simple supporting plate supported on the side face turning edges, the thickness can be very thin, the weight of the canopy is greatly reduced, and the effective height and the stress performance of the bending section are greatly improved. The number of ribs exposed out of the canopy is small, components are light, the structural body does not contain components protruding out of the module in the prefabrication stage, and mold machining and component production are convenient. The connecting node of the structure main body and the canopy is simple in structure, the time for connecting the structure main body and the canopy to form an integral firm body on site is short, the canopy temporary support can be dismantled one day after installation, and the construction efficiency is high.

Description

Technical Field

[0001] The invention belongs to the field of construction, and in particular relates to a prefabricated concrete canopy and a connection node between the prefabricated concrete canopy and a modular structural body, and a construction method. Background Art

[0002] As early as September 2016, the General Office of the State Council issued the "Guiding Opinions on Vigorously Developing Prefabricated Buildings", which mentioned that prefabricated buildings are buildings assembled on site with prefabricated parts and components, which are conducive to saving resources and energy, reducing construction pollution, improving labor production efficiency and quality and safety levels, and promoting the deep integration of the construction industry and information industrialization, cultivating new industries and new momentum, and promoting the elimination of excess production capacity. Since the General Office of the State Council issued the "Guiding Opinions on Vigorously Developing Prefabricated Buildings" in 2016, relevant policy documents have been released one after another, and standards have been gradually improved. All parts of the country have shown a high-speed development trend of keeping pace with each other, and key development areas have taken the lead in entering the stage of high-quality and green and low-carbon development. With the increase in prefabricated buildings, prefabricated building technology has also been continuously innovated and upgraded.

[0003] Concrete modular buildings are prefabricated buildings that are divided into several room "unit" modules during the design phase. The modules are then prefabricated to high standards in a factory and transported to the construction site for assembly and connection.

[0004] Compared with traditional construction, modular buildings have a higher degree of factory manufacturing and system integration. Factory production and on-site construction are carried out in parallel. The construction site only needs to assemble the modules like building blocks. Factory production and on-site construction are carried out in parallel, and the total construction period can be greatly shortened. The corresponding environmental impacts such as on-site noise and solid waste can also be greatly reduced.

[0005] The modules are prefabricated in the factory using high-precision molds, which can effectively control the size error. The error of traditionally built houses is at the centimeter level, while the error of houses built with modular integrated construction technology can be controlled at the millimeter level.

[0006] Compared with prefabricated components such as beams and columns, the molds of room unit modules are large in size, heavy in weight, and have many parts. They require high mold design and processing technology, and are difficult to demould and close. Especially for rooms with protruding parts such as awnings, if an integral mold containing protruding components is used, it will greatly increase the difficulty of mold processing and demoulding and closing during component production. Summary of the invention

[0007] The purpose of the present invention is to provide a precast concrete canopy and a connection node with a modular structural body, and a construction method. The canopy has a small number of reinforcement bars and light components. The modular structural body does not include components protruding outside the modules during the prefabrication stage, which is convenient for mold processing and component production. The connection node between the modular structural body and the canopy is simple in structure, and the time for connecting on site to form an overall solid body is short. The temporary support of the canopy can be removed one day after installation, and the construction efficiency is high.

[0008] The present invention is achieved in this way. A precast concrete canopy includes a base plate, two side flanges respectively located on the two sides of the base plate, and a vertical flange, wherein the base plate and the side flanges and the vertical flange are connected to each other by steel bars, and the side flanges and the vertical flange are also connected to each other by steel bars; anchor steel bars are embedded in the side flange, and one end of the anchor steel bar protrudes out of the outer side of the side flange.

[0009] To achieve the above-mentioned purpose, the present invention further provides a connection node between a precast concrete canopy and a modular structural body, comprising a precast concrete canopy and a modular structural body, wherein the precast concrete canopy comprises a bottom plate, two side flanges respectively located on two sides of the bottom plate, and a vertical flange, wherein the bottom plate and the side flanges and the vertical flange are connected to each other through steel bars, and the side flanges and the vertical flanges are also connected to each other through steel bars;

[0010] Anchor steel bars are embedded in the side flanges, and the modular structural body is provided with anchor holes. One end of the anchor steel bar extends out of the side flange and into the anchor hole to be fixedly connected with the modular structural body.

[0011] Furthermore, the connection node also includes a finished sleeve with a bottom plate, the inner end of the anchor hole is provided with a trumpet groove, the finished sleeve with a bottom plate is embedded in the anchor hole, and the bottom plate in the finished sleeve with a bottom plate is clamped at the bottom surface of the trumpet groove, the anchor steel bar extends into the finished sleeve with a bottom plate, the end position of the anchor steel bar is provided with a thread, the end sleeve of the anchor steel bar is provided with a gasket and a nut, and the end of the anchor steel bar is welded and fixed to the nut.

[0012] Furthermore, the gap between the anchor steel bar and the finished product sleeve with bottom plate is filled with grouting material.

[0013] Furthermore, the bottom surface of the trumpet notch is a rough surface, and the trumpet notch is filled with dry hard fine stone concrete.

[0014] Furthermore, a groove surface is reserved at the junction of the modular structure body and the precast concrete canopy, the groove surface is a rough surface, and the groove surface is covered with thermal insulation mortar.

[0015] In order to achieve the above-mentioned purpose of the invention, the present invention also provides a construction method for the connection node between the above-mentioned precast concrete canopy and the modular structure body, and the construction method comprises the following steps:

[0016] S1. Prefabricated concrete canopy and modular structure in the factory;

[0017] S2. Install the modular structure body at the construction site;

[0018] S3. Set up temporary support for precast concrete canopy;

[0019] S4. Apply thermal insulation mortar to the groove surface at the junction of the modular structure body and the precast concrete canopy;

[0020] S5. Lift the precast concrete canopy into place and insert the anchor steel bars into the anchor holes;

[0021] S6. Fill the gap between the anchor steel bar and the finished sleeve with bottom plate with grouting material;

[0022] S7. Insert the gasket into the inner side of the anchor steel bar and screw in the nut; after the nut is tightened, weld the nut to the anchor steel bar;

[0023] S8. Use dry hard fine stone concrete to fill the trumpet groove.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention utilizes the cross-sectional height of the side flange of the precast concrete canopy to design the precast concrete canopy as a beam-type load-bearing component. The bottom plate of the precast concrete canopy is designed as a simply supported plate supported on the side flange, and the thickness can be made very thin. Compared with the conventional canopy designed as a cantilever plate, the weight of the precast concrete canopy is greatly reduced, the effective height of the bending section is greatly increased, and the load-bearing performance is better.

[0026] Prefabricated concrete canopies only have anchor steel bars on the sides, with a small number of bars and light components, which is convenient for canopy mold processing and component production. The connection nodes with the modular structure main body are firm, which reduces the difficulty of mold processing and component prefabrication; the canopy component on-site node connection structure is simple and the construction efficiency is high.

[0027] The modular structure body does not contain any components protruding from the module during the prefabrication stage. The number of stress-bearing connection points with the prefabricated concrete canopy is small, the connection node structure is simple, and the time required for on-site connection between the canopy and the modular structure body to form an overall solid body is short. The temporary support of the canopy can be removed one day after installation, and the construction efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a top view of a precast concrete canopy provided by an embodiment of the present invention;

[0029] Figure 2 is a longitudinal cross-sectional schematic diagram of a precast concrete canopy provided in an embodiment of the present invention;

[0030] Figure 3 is a schematic cross-sectional view of a precast concrete canopy provided in an embodiment of the present invention;

[0031] Figure 4 It is a schematic diagram of the construction of a connection node between a precast concrete canopy and a modular structural body provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] See also Figures 1 to 3 ,in, Figure 1 is a top view of a precast concrete canopy provided by an embodiment of the present invention; Figure 2 is a longitudinal cross-sectional schematic diagram of a precast concrete canopy provided in an embodiment of the present invention; Figure 3 It is a schematic transverse cross-sectional view of a precast concrete canopy provided in an embodiment of the present invention.

[0034] The precast concrete canopy is an entrance door canopy for residential buildings. The precast concrete canopy is 2400mm long, 900mm cantilevered, and 400mm high (with flange). Each precast concrete canopy includes a bottom plate 1, two side flanges 2 located on both sides of the bottom plate 1, and a vertical flange 3. The bottom plate 1, the side flanges 2, and the vertical flange 3 are connected to each other by steel bars, and the side flanges 2 and the vertical flanges 3 are also connected to each other by steel bars, and are integrally cast in the processing plant.

[0035] The side flange 2 is provided with two anchoring steel bars 4, and the modular structural body 5 is provided with four anchoring holes 6. One end of the anchoring steel bar 4 extends out of the side flange 2 by 130 mm and extends into the anchoring hole 6 to be fixedly connected with the modular structural body 2.

[0036] See also Figure 4 , shows a connection node between a precast concrete canopy and a modular structural body provided in this embodiment, including a precast concrete canopy and a modular structural body 5. The modular structural body 5 is provided with four anchor holes 6, and a finished sleeve with a bottom plate 7 is provided at the anchor holes 6. The finished sleeve with a bottom plate 7 has a sleeve wall thickness of 6mm, a total length of 90mm, an inner diameter of the sleeve of 30mm, and a bottom plate diameter of 90mm.

[0037] A trumpet notch 8 is provided at the inner end of the anchor hole 6, and the finished product with base plate sleeve 7 is embedded in the anchor hole 6, and the base plate in the finished product with base plate sleeve 7 is clamped at the bottom surface of the trumpet notch 8, and the anchor steel bar 4 extends into the finished product with base plate sleeve 7, and the end position of the anchor steel bar 4 is stripped and threaded to form a thread, and the threading length is 50mm. The end sleeve of the anchor steel bar 4 is provided with a gasket 9, and the gasket 9 has a thickness of 8mm and a diameter of 60mm. Then, after the double nut 10 is screwed in, the double nut 10 is welded and fixed to the end of the anchor steel bar 4.

[0038] The gap between the anchoring steel bar 4 and the finished product sleeve with bottom plate 7 is filled with grouting material.

[0039] A 15 mm deep groove surface is reserved at the junction of the modular structure body 5 and the precast concrete canopy. The groove surface is a rough surface and is covered with M25 thermal insulation mortar 11.

[0040] The bottom surface of the trumpet notch 8 is a rough surface. After the steel bars are firmly connected, the trumpet notch 8 is filled with C30 dry hard fine stone concrete.

[0041] This embodiment also provides a construction method for the connection node between the precast concrete canopy and the modular structure body, comprising the following steps:

[0042] S1. Prefabricated concrete canopy and modular structure in the factory;

[0043] S2. Install the modular structure body at the construction site;

[0044] S3. Set up temporary support for precast concrete canopy;

[0045] S4. Apply M25 insulation mortar 11 on the groove surface at the junction of the modular structure body and the precast concrete canopy;

[0046] S5. Lift the precast concrete canopy into place and insert the anchor steel bar 4 into the anchor hole 6;

[0047] S6. Fill the gap between the anchor steel bar 4 and the finished bottom plate sleeve 7 with grouting material;

[0048] S7. Insert the gasket 9 into the inner end of the anchor bar 4 and screw in the double nut 10; after the double nut 10 is tightened, weld the double nut 10 and the anchor bar 4;

[0049] S8. Use dry hard fine stone concrete to fill the trumpet groove 8.

[0050] In summary, the connection node and construction method of the prefabricated concrete canopy and the modular structural body provided in this embodiment can achieve the following technical effects:

[0051] 1. By utilizing the cross-sectional height of the side flange 2 of the precast concrete canopy, the precast concrete canopy can be designed as a beam-type load-bearing member. The bottom plate 1 of the precast concrete canopy is designed as a simply supported plate supported on the side flange 2, and the thickness can be made very thin. Compared with the conventional canopy designed as a cantilever plate, the weight of the precast concrete canopy is greatly reduced, the effective height of the bending section is greatly increased, and the load-bearing performance is better. The precast concrete canopy is provided with only two anchoring steel bars 4 on each of the two side flanges 2, and the number of bars is small, which is convenient for canopy mold processing and the production of the precast concrete canopy 1.

[0052] Second, the modular structure body 5 does not include components protruding from the module during the prefabrication stage, which reduces the difficulty of structure body mold processing and module prefabrication.

[0053] 3. The connection design between the precast concrete canopy and the modular structure main body 5 solves the problem that the wall thickness of the modular structure main body 5 is very thin (140mm), and the conventional anchoring design cannot meet the anchoring length required by the specification. The anchoring steel bar 4 passes through the finished product with the bottom plate sleeve 7, sets the gasket 9, sets the double nut 10 to tighten and weld it, which can effectively expand the concrete punching surface and reliably transmit the internal force of the anchoring steel bar 4 to the modular structure main body 5.

[0054] Fourth, a trumpet notch 8 is provided at the anchor hole 6, and a large inner diameter finished sleeve with a bottom plate 7 is provided at the connection point to facilitate the passage of the anchor steel bar 4, thereby solving the tolerance problem of the processing and installation accuracy of the prefabricated component.

[0055] 5. The number of stress connection points between the modular structure main body 5 and the precast concrete canopy is small, the connection node structure is simple, and the time for the precast concrete canopy and the modular structure main body 5 to be connected on site to form an integral and solid body is short. After the gap between the anchor steel bar 4 and the sleeve is filled with grouting material, the anchor steel bar 4 and the double nut 10 are tightened and welded, and the temporary support of the canopy can be removed one day after installation, and the construction efficiency is high.

[0056] 6. A 15mm deep groove is reserved at the interface between the modular structure body 5 and the prefabricated concrete canopy. The groove surface is roughened and coated with M25 thermal insulation mortar 11. The interface between the prefabricated components can be effectively waterproofed to avoid cold bridges.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A prefabricated concrete canopy, characterized in that: It includes a base plate, two side flanges respectively located on the two sides of the base plate and a vertical flange, wherein the base plate and the side flanges and the vertical flange are connected to each other through steel bars, and the side flanges and the vertical flange are also connected to each other through steel bars; anchor steel bars are embedded in the side flange, and one end of the anchor steel bar protrudes out of the outer side of the side flange.

2. A connection node between a prefabricated concrete canopy and a modular structural body, characterized in that: The precast concrete canopy comprises a precast concrete canopy and a modular structural body, wherein the precast concrete canopy comprises a bottom plate, two side flanges respectively located on two sides of the bottom plate, and a vertical flange, wherein the bottom plate and the side flanges and the vertical flange are connected to each other through steel bars, and the side flanges and the vertical flanges are also connected to each other through steel bars; Anchor steel bars are embedded in the side flanges, and the modular structural body is provided with anchor holes. One end of the anchor steel bar extends out of the side flange and into the anchor hole to be fixedly connected with the modular structural body.

3. The connection node according to claim 2, characterized in that: It also includes a finished product with a bottom plate sleeve, the inner end of the anchor hole is provided with a trumpet groove, the finished product with a bottom plate sleeve is embedded in the anchor hole, and the bottom plate in the finished product with a bottom plate sleeve is clamped at the bottom surface of the trumpet groove, the anchor steel bar extends into the finished product with a bottom plate sleeve, the end position of the anchor steel bar is provided with a thread, the end of the anchor steel bar is provided with a gasket and a nut, and the end of the anchor steel bar is welded and fixed to the nut.

4. The connection node according to claim 3, characterized in that: The gap between the anchor steel bar and the finished product sleeve with bottom plate is filled with grouting material.

5. The connection node according to claim 4, characterized in that: The bottom surface of the trumpet notch is a rough surface, and the trumpet notch is filled with dry hard fine stone concrete.

6. The connection node according to claim 5, characterized in that: A groove surface is reserved at the junction of the modular structure body and the prefabricated concrete canopy, the groove surface is a rough surface, and the groove surface is covered with thermal insulation mortar.

7. The construction method of the connection node between the precast concrete canopy and the modular structural body according to claim 6 is characterized in that: The following steps are involved: S1. Prefabricated concrete canopy and modular structure in the factory; S2. Install the modular structure body at the construction site; S3. Set up temporary support for precast concrete canopy; S4. Apply thermal insulation mortar to the groove surface at the junction of the modular structure body and the precast concrete canopy; S5. Lift the precast concrete canopy into place and insert the anchor steel bars into the anchor holes; S6. Fill the gap between the anchor steel bar and the finished sleeve with bottom plate with grouting material; S7. Insert the gasket into the inner side of the anchor steel bar and screw in the nut; after the nut is tightened, weld the nut to the anchor steel bar; S8. Use dry hard fine stone concrete to fill the trumpet groove.

Images