Components and construction method for pouring concrete corbels of large-span steel corridors without support

Abstract

The present invention discloses a component and construction method for casting a large-span steel corridor concrete corbel without a support, which specifically includes the following operation steps: S1. Design a concrete corbel construction hanger according to a construction plan; S2. Process and obtain a finished concrete corbel construction hanger; S3. The installation position of the hanger and the lower hanging fulcrum of the steel corridor; S4. After the finished hanger is installed, a construction platform is set up, a corbel steel frame is compiled and an I-beam is installed; S5. A corbel construction support is set up, and the support is moved to the construction platform for supporting the corbel steel frame; S6. An elastic support is set up on the top of the corbel steel frame, and square wood is set up on the corbel construction support for installing a concrete corbel construction template, and concrete is poured, and after the concrete strength reaches the standard, the template is removed to obtain the large-span steel corridor concrete corbel. The construction method of the present invention can conveniently perform the casting operation of the corbel at the bottom of the steel corridor under relatively low-risk conditions by using the steel corridor as a lower hanging fulcrum to set up the corbel template system.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a component and a construction method for casting large-span steel corridor concrete corbels without a support. Background Art

[0002] With the development of social economy, people's demand and needs for buildings are constantly increasing and improving, and connected complex high-rise buildings are gradually emerging. The connected structure generally refers to the design in which the higher floors of two or several buildings are connected to each other by an overhead connector to meet the requirements of architectural shape and building use functions and strengthen the connection between the two buildings. In order to ensure good lighting effects and a broad field of view, the traditional overhead connected structure constructed between buildings generally adopts a large-span steel corridor structure.

[0003] The steel corridor structure of a certain complex project is mainly composed of multiple steel truss structures. The overall plane of the corridor is rectangular or parallelogram. The frames on both sides of the bottom are generally called steel truss lower chord beams. At the same time, according to the "Safety Management Measures for High-risk Parts and Items of Engineering" (Jianbanzhi

[2018] No. 31), the engineering formwork support system involves a construction height of 8m and above; a span of 18m and above, a total construction load of 15kN / m2 and above; and a concentrated line load of 20kN / m and above. For high-risk parts and items exceeding a certain scale, a tall formwork support system must be compiled.

[0004] Therefore, when the actual steel corridor structure is lifted and erected, it is also necessary to set a corresponding corbel structure at the bottom of the structure of the lower chord beam of the steel truss to stably support the entire steel corridor. The commonly used forms of corbels are cast-in-place reinforced concrete corbels or steel corbels wrapped with concrete. However, considering that the height-to-width ratio of the erected frame seriously exceeds the requirements of the specification, the stability of the supporting frame is not strong, and there is a risk of overturning during the erection and dismantling process. Usually, the structural size and installation elevation of this type of corbel are very large. In the actual construction process, the formwork support system of this part is not only difficult to construct, which is not conducive to the erection of the support system, but also has a high construction risk.

[0005] To this end, the present application specifically proposes a component and construction method for the unsupported casting of concrete corbels of a large-span steel corridor to solve the above-mentioned technical problems. Summary of the invention

[0006] The main purpose of the present invention is to provide a component and construction method for the non-support casting of concrete corbels of a large-span steel corridor to solve the above-mentioned technical problems.

[0007] The present invention adopts the following technical solutions to solve the above technical problems:

[0008] A construction method for pouring concrete corbels of a large-span steel corridor without a support, specifically comprising the following steps:

[0009] S1. Design a concrete corbel construction bracket of specified size according to the steel corridor structure distribution diagram and the location and size of the reserved corbel in the construction plan;

[0010] S2. According to the designed concrete corbel construction bracket, a steel beam of a specified size is used for splicing and processing to obtain a finished concrete corbel construction bracket;

[0011] S3. According to the construction scenario of the steel corridor structure in the construction plan, determine the installation position of the finished concrete bracket construction bracket, and select the designated part of the steel corridor as the lower hanging fulcrum;

[0012] S4. Install the finished concrete corbel construction bracket at the designated position of the steel corridor structure, and set up a construction platform at the bottom of the bracket for the operator to set the I-beam according to the reserved corbel position and prepare the corbel reinforcement frame on the construction platform;

[0013] S5. Set up a concrete corbel construction bracket and move the bracket to the construction platform of the concrete corbel construction bracket to support the corbel steel frame;

[0014] S6. Set up an elastic bracket on the top of the corbel reinforcement frame for connection with the steel corridor structure, set up square timber on the corbel construction bracket to install the concrete corbel construction formwork, and pour concrete. After the concrete strength reaches the standard, remove the formwork to obtain the large-span steel corridor concrete corbel.

[0015] Preferably, in the step S1, a reserved space of a specified length is provided between the steel corridor structure and the building structure, and the length of the reserved corbel is set to be smaller than the length of the reserved space.

[0016] Preferably, the specific operation steps of constructing and splicing to obtain the concrete corbel construction hanger in step S2 are:

[0017] Select 20a I-beams, 22a I-beams and two sets of 45a I-beams of specified length according to size requirements;

[0018] The 20a I-beam and the 22a I-beam are arranged vertically, and two groups of 45a I-beams are arranged horizontally, and are welded to each other at both ends to obtain a concrete corbel construction bracket with a rectangular frame.

[0019] Preferably, the designated location for installing the concrete corbel construction bracket in step S4 is set as the lower chord of the steel truss of the steel corridor structure, and the specific operation steps for erecting the construction platform are:

[0020] Core-filling rods are set up at equal intervals on the concrete corbel construction bracket along the length direction of the lower chord of the steel truss, and the construction platform is installed on the core-filling rods;

[0021] A steel-palladium anti-fall net is installed at the bottom of the concrete corbel construction bracket.

[0022] Preferably, while the construction platform erection operation is being carried out in the step S4, protective steel pipe nets are also installed on both sides of the concrete corbel construction bracket.

[0023] Preferably, in the step S4, the I-beam and the corbel reinforcement frame are both arranged on the reserved corbel, and the I-beam is located inside the compiled corbel reinforcement frame.

[0024] A component for casting concrete corbels of a large-span steel corridor without a support is applied to any of the above-mentioned construction methods for casting concrete corbels of a large-span steel corridor without a support, comprising a plurality of groups of corbel hangers erected on the steel corridor structure, a plurality of groups of core-filling rods erected at equal intervals at the bottom of the corbel hangers, a protective steel pipe net arranged at both ends of the corbel hangers, a construction platform arranged on the core-filling rods, a corbel steel bar frame arranged on the reserved corbel, an I-beam arranged in the corbel steel bar frame, a corbel support arranged on the construction platform for supporting the corbel steel bar frame, and an elastic support arranged on the top of the corbel steel bar frame for connecting with the steel corridor structure

[0025] Preferably, a through hole penetrating from top to bottom is provided at the top of a group of the corbel hangers close to the reserved corbels.

[0026] Preferably, the elastic bracket is configured as an elastic rubber bracket.

[0027] Preferably, a skirting board is provided on the construction platform.

[0028] The invention provides a component and a construction method for the support-free casting of a large-span steel corridor concrete corbel.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] 1. The construction method of the present invention uses the steel corridor as a lower hanging fulcrum to set up the corbel formwork system, which can facilitate the casting operation of the corbel at the bottom of the steel corridor under low-risk conditions, and can cast the corbel after the steel corridor is lifted, which is convenient for the overall lifting construction and use of the steel corridor.

[0031] 2. By arranging an elastic bracket on the top of the corbel steel bar frame, the component of the present invention can ensure that there is a certain elastic space between the corbel finished product and the lower chord beam of the steel truss of the steel corridor structure after the steel corridor structure and the corbel finished product are installed. This can not only ensure the normal installation of the corbel finished product, but also ensure the normal support of the corbel finished product when the steel corridor structure is formally used and subjected to stress.

[0032] 3. The construction method of the present invention moves the corbel bracket to the construction platform after the corbel steel bar frame is compiled, which allows construction personnel to quickly determine the size and position of the finished corbel, thereby reserving space for construction, and also facilitates the use of the bracket to stably support the overall corbel structure during the casting process of the corbel structure, which is convenient for use.

[0033] 4. The component of the present invention can facilitate the construction workers to measure and construct the corbels by setting up a construction platform, and facilitate the preparation and use of I-beams and corbel steel reinforcement frames. At the same time, the component of the present invention can also facilitate the installation of protective steel pipe nets and steel palladium anti-fall nets through the construction platform to ensure the safety of construction workers on the construction platform.

[0034] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0036] Figure 1 is a flow chart of the construction method of the present invention;

[0037] Figure 2 It is a schematic diagram of the side view structure position of the finished corbel of the present invention;

[0038] Figure 3 It is a schematic side view of the installation and connection structure of the assembly of the present invention;

[0039] Figure 4 for Figure 2 Schematic diagram of the structural position from the perspective of middle A;

[0040] Figure 5 It is a front view schematic diagram of the installation and connection structure of the assembly of the present invention;

[0041] Figure 6 It is a three-dimensional schematic diagram of the installation structure of the corbel hanger of the present invention;

[0042] Figure 7 It is a three-dimensional schematic diagram of the installation structure of the core filling rod of the present invention;

[0043] Figure 8 It is a three-dimensional schematic diagram of the installation structure of the construction platform and the corbel steel bar frame of the present invention;

[0044] Fig. 9 It is a structural stereoscopic schematic diagram of a corbel steel bar frame of the present invention;

[0045] Fig.10 It is a three-dimensional schematic diagram of the installation and connection structure of the corbel bracket of the present invention;

[0046] Fig.11 It is a three-dimensional schematic diagram of the installation and connection structure of the template of the present invention;

[0047] Fig.12 It is a three-dimensional schematic diagram of the finished corbel connection structure of the present invention.

[0048] In the figure:

[0049] 1. Reserved corbels; 2. Steel corridor structure; 3. Steel truss lower chord; 4. Elastic bracket; 5. Corbel hanger; 501, through hole; 6. Corbel bracket; 7. Anti-collision strip; 8. Protective steel pipe net; 9. Construction platform; 10. Core filling rod; 11. Steel palladium anti-fall net; 12. I-beam; 13. Corbel steel frame; 14. Finished corbel; 15. Square timber; 16. Formwork. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0051] In the embodiment, see Figures 1 to 12 .

[0052] The present invention provides a construction method for casting large-span steel corridor concrete corbels without a support, and the specific implementation operation is performed after the steel corridor structure 2 is lifted.

[0053] When using a crane structure to lift the steel corridor structure 2 to a specified height, it is necessary to note that an anti-collision strip 7 can be set at a specified height position of the building structure to ensure the normal lifting of the steel corridor structure 2 and avoid collision. At the same time, before the steel corridor structure 2 is lifted to the specified height, it is also necessary to note that a reserved space of a specified length is set between the steel corridor structure 2 and the building structure, and the length of the reserved corbel 1 is set to be less than the length of the reserved space.

[0054] like Figure 1 As shown, the construction method of pouring the large-span steel corridor concrete corbel without a support specifically includes the following steps:

[0055] S1. According to the specific distribution diagram of the steel corridor structure 2 in the construction plan and the position and size of the reserved corbel 1, a concrete corbel construction bracket of a specified size is designed.

[0056] For example Figure 3 and Figure 4As shown, according to the structure of the reserved corbel 1 using the drawing of 1500mm×1500mm×500mm, a concrete corbel hanger 5 with specified dimensions, such as inner width and height of 4000mm and 6000mm, can be designed. Here, the corridor corbel is a steel-concrete structure with concrete dimensions of 1.5m×1.5m×2.8m and steel dimensions of HW1200mm×900mm×40mm×40mm. At the same time, it should be noted that the reserved corbel is steel.

[0057] S2. According to the designed concrete corbel construction bracket, the steel beams of specified size are spliced ​​and processed to obtain the finished concrete corbel construction bracket:

[0058] Select 20a I-beams, 22a I-beams and two sets of 45a I-beams of specified length according to size requirements;

[0059] The 20a I-beam and the 22a I-beam are arranged vertically, and the two sets of 45a I-beams are arranged horizontally, and are welded to each other at both ends to obtain a rectangular frame, for example Figure 5 Concrete corbel construction bracket shown.

[0060] S3. According to the construction scenario of the steel corridor structure 2 in the construction plan, determine the installation position of the finished concrete corbel construction bracket, and select a designated position of the steel corridor as the lower hanging support.

[0061] S4. References Figure 6 , install the finished concrete corbel construction bracket on the steel truss lower chord beam 3 of the steel corridor structure 2, and set up a construction platform 9 at the bottom of the bracket, so that the operator can set the I-beam 12 and prepare the corbel steel frame 13 according to the reserved position of the corbel 1 on the construction platform 9. Figure 7 , Figure 8 and Fig. 9 As shown, the I-beam 12 and the corbel reinforcement frame 13 are both arranged on the reserved corbel 1, and the I-beam 12 is located inside the compiled corbel reinforcement frame 13;

[0062] The construction platform 9 is used to install construction personnel and perform measurement and construction of the bracket structure. At the same time, after the construction platform 9 is completed, operation platforms of different heights can be further set up on the construction platform 9 in combination with the construction site.

[0063] The specific operation steps of erecting the construction platform 9 are:

[0064] like Figure 7 As shown, core-filling rods 10 are evenly spaced on the concrete corbel construction bracket along the length direction of the steel truss lower chord beam 3, and at this time, the construction platform 9 is stably installed on the core-filling rods 10;

[0065] A steel palladium anti-falling net 11 is arranged at the bottom of the concrete corbel construction bracket.

[0066] It should be noted that, while the construction platform 9 is being erected, protective steel pipe nets 8 are also installed on both sides of the concrete corbel construction bracket.

[0067] Therefore, by setting up a construction platform 9, the present invention can facilitate the construction workers to carry out measurement and construction of the corbel, and facilitate the preparation and use of the I-beam 12 and the corbel steel frame 13. At the same time, the components of the present invention can also facilitate the installation of the protective steel pipe net 8 and the steel palladium anti-fall net 11 through the construction platform 9 to ensure the safety of the construction workers on the construction platform 9.

[0068] S5. References Fig.10 , set up a concrete corbel construction bracket, and move the bracket to the construction platform 9 of the concrete corbel construction bracket to support the corbel steel frame 13;

[0069] By moving the corbel bracket 6 to the construction platform 9 after the corbel reinforcement frame 13 is compiled, the construction workers can quickly determine the size and position of the finished corbel 14, which is convenient for reserving space for construction, and can also use the bracket to stably support the entire corbel structure during the casting process of the corbel structure, which is convenient for use.

[0070] S6. Also refer to Fig.10 , an elastic bracket 4 for connecting with the steel corridor structure 2 is set up on the top of the corbel steel frame 13;

[0071] Later reference Fig.11 , set up square wood 15 on the corbel construction support for installing concrete corbel construction formwork 16, and pour concrete. After the concrete strength reaches the standard, remove the formwork to obtain the large-span steel corridor concrete corbel. The actual use of the large-span steel corridor concrete corbel is referenced Figure 2 and Figure 4 and Fig.12 .

[0072] In summary, the construction method of the present invention utilizes the steel corridor as a lower hanging fulcrum to set up the corbel formwork system, which can facilitate the casting operation of the corbel at the bottom of the steel corridor under relatively low-risk conditions, and can cast the corbel after the steel corridor is lifted, thereby facilitating the overall lifting construction and use of the steel corridor.

[0073] In a specific embodiment, the present invention also provides a component for casting a large-span steel corridor concrete corbel without a bracket, which can be applied to the above-mentioned construction method for casting a large-span steel corridor concrete corbel without a bracket, referring to Figure 3 , Figure 5 , Fig.10 and Fig.11, including multiple groups of corbel hangers 5 erected on the steel corridor structure 2, multiple groups of core filling rods 10 erected at equal intervals at the bottom of the corbel hangers 5, protective steel pipe nets 8 arranged at both ends of the corbel hangers 5, a construction platform 9 arranged on the core filling rods 10, a corbel steel bar frame 13 arranged on the reserved corbel 1, an I-beam 12 arranged in the corbel steel bar frame 13, a corbel bracket 6 arranged on the construction platform 9 for supporting the corbel steel bar frame 13, and an elastic bracket 4 arranged on the top of the corbel steel bar frame 13 for connecting with the steel corridor structure 2, wherein the elastic bracket 4 is preferably set as an elastic rubber bracket.

[0074] By arranging an elastic bracket 4 on the top of the corbel steel bar frame 13, it can be ensured that there is a certain elastic space between the corbel finished product 14 and the steel truss lower chord beam 3 of the steel corridor structure 2 after the steel corridor structure 2 and the corbel finished product 14 are installed. This can not only ensure the normal installation of the corbel finished product 14, but also ensure the normal support of the corbel finished product 14 when the steel corridor structure 2 is officially used and subjected to stress.

[0075] In addition, a through hole 501 is provided at the top of a group of corbel hangers 5 near the reserved corbel 1, and a small I-beam can be provided on the top of the hanger to prevent the hanger from being cast in the floor deck after the floor deck is cast.

[0076] At the same time, a skirting board is provided on the construction platform 9, and the skirting board is preferably set to 0.15m high, which can effectively protect the overall structure of the component during construction operations by construction workers.

[0077] 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, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0078] In addition, it should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0079] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that A and B meet at the same time. In addition, in the embodiments of the present invention, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A construction method for pouring concrete corbels of a large-span steel corridor without a support, characterized in that: The specific steps include the following: S1. According to the distribution map of the steel corridor structure (2) in the construction plan and the location and size of the reserved bracket (1), design a concrete bracket construction rack of a specified size; S2. According to the designed concrete corbel construction bracket, a steel beam of a specified size is used for splicing and processing to obtain a finished concrete corbel construction bracket; S3. According to the construction scenario of the steel corridor structure (2) in the construction plan, determine the installation position of the finished concrete bracket construction rack, and select the designated part of the steel corridor as the lower hanging fulcrum; S4. The finished concrete bracket construction rack is installed at the designated position of the steel corridor structure (2), and a construction platform (9) is set up at the bottom of the rack for the operator to set the I-beam (12) and prepare the bracket steel frame (13) according to the reserved bracket (1) position on the construction platform (9); S5. Set up a concrete corbel construction bracket and move the bracket to the construction platform (9) of the concrete corbel construction bracket to support the corbel steel frame (13); S6. An elastic bracket (4) for connecting with the steel corridor structure (2) is set up on the top of the corbel reinforcement frame (13), and square timber is set up on the corbel construction bracket to install the concrete corbel construction formwork, and concrete is poured. After the concrete strength reaches the standard, the formwork is removed to obtain the large-span steel corridor concrete corbel.

2. The construction method for pouring concrete brackets of large-span steel corridors without support as claimed in claim 1 is characterized in that: In step S1, a reserved space of a specified length is provided between the steel corridor structure (2) and the building structure, and the length of the reserved corbel (1) is set to be smaller than the length of the reserved space.

3. The construction method for pouring concrete corbels of a large-span steel corridor without a support as claimed in claim 1 is characterized in that: The specific operation steps of constructing and splicing to obtain the concrete corbel construction hanger in step S2 are: Select 20a I-beams, 22a I-beams and two sets of 45a I-beams of specified length according to size requirements; The 20a I-beam and the 22a I-beam are arranged vertically, and two groups of 45a I-beams are arranged horizontally, and are welded to each other at both ends to obtain a concrete corbel construction bracket with a rectangular frame.

4. The construction method for pouring concrete corbels of a large-span steel corridor without a support as claimed in claim 1 is characterized in that: In the step S4, the designated location for installing the concrete corbel construction bracket is set as the steel truss lower chord beam (3) of the steel corridor structure (2), and the specific operation steps for erecting the construction platform (9) are as follows: Core-filling rods (10) are installed at equal intervals on the concrete bracket construction hanger along the length direction of the steel truss lower chord beam (3), and the construction platform (9) is installed on the core-filling rods (10); A steel palladium anti-falling net (11) is arranged at the bottom of the concrete corbel construction hanging frame.

5. The construction method for pouring concrete corbels of a large-span steel corridor without a support as claimed in claim 4 is characterized in that: While the construction platform (9) is being erected in step S4, protective steel pipe nets (8) are installed on both sides of the concrete corbel construction hanger.

6. The construction method for pouring concrete corbels of a large-span steel corridor without a support as claimed in claim 1 is characterized in that: In the step S4, the I-beam (12) and the corbel reinforcement frame (13) are both arranged on the reserved corbel (1), and the I-beam (12) is located inside the prepared corbel reinforcement frame (13).

7. A component for casting concrete corbels of large-span steel corridors without brackets, characterized in that: The construction method for casting concrete corbels across steel corridors without supports as described in any one of claims 1 to 6 above comprises a plurality of corbel hangers (5) erected on a steel corridor structure (2), a plurality of core-filling rods (10) equally spaced at the bottom of the corbel hangers (5), a protective steel pipe mesh (8) arranged at both ends of the corbel hangers (5), a construction platform (9) arranged on the core-filling rods (10), a corbel reinforcement frame (13) arranged on a reserved corbel (1), an I-beam (12) arranged in the corbel reinforcement frame (13), a corbel support (6) arranged on the construction platform (9) for supporting the corbel reinforcement frame (13), and an elastic support (4) arranged on the top of the corbel reinforcement frame (13) for connecting to the steel corridor structure (2).

8. The assembly for casting large-span steel corridor concrete corbels without support as claimed in claim 7, characterized in that: A through hole (501) penetrating from top to bottom is arranged at the top of a group of the corbel hangers (5) close to the reserved corbels (1).

9. The assembly for casting large-span steel corridor concrete corbels without support as claimed in claim 7, characterized in that: The elastic bracket (4) is configured as an elastic rubber bracket.

10. The assembly for casting large-span steel corridor concrete corbels without support as claimed in claim 7, characterized in that: The construction platform (9) is provided with a skirting board.

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