A support system and construction method for SRC beam integrated construction

Abstract

The present invention discloses a support system and a construction method for the integrated construction of SRC beams, which belong to the field of construction engineering and solve the problem of the cumbersome installation of the current large-span SRC beams. The present invention includes a plurality of H-shaped steel supports, which are supported between the SRC beam integrated construction template and the steel frame in the SRC beam, and the plurality of H-shaped steel supports are evenly arranged along the length direction of the SRC beam. Construction method: Calculate and analyze the load distribution of the SRC beam and its upper part; formulate a design plan for the integrated construction support system of the SRC beam; determine the number and support point positions of the H-shaped steel supports; set up the SRC beam integrated construction template; spot weld the H-shaped steel supports to the bottom of the steel frame in the SRC beam; perform the installation construction of the steel frame in the SRC beam and the integrated construction of the steel bars and concrete in the SRC beam. The present invention ensures the stability of the installation of the steel frame in the SRC beam and the uniform force of the integrated construction support system of the SRC beam, thereby reducing the complexity of the integrated construction of the SRC beam.

Description

Technical Field

[0001] The invention belongs to the field of construction engineering, and in particular relates to a support system for integrated construction of SRC beams and a construction method thereof. Background Art

[0002] The application of SRC components began in the 1950s. Compared with foreign countries, my country's research and application of SRC components started relatively late. After more than 20 years of research, my country's SRC structure has initially formed a set of its own theories, but with the rapid development of the economy, people have higher and higher requirements for the ornamental value of building structures, and there are more and more super-large and special-shaped buildings. SRC components have occupied a major position in large-span and large-cantilever building structures. As the cantilever span of the structure becomes larger and larger, the integrated construction of steel-framed components and reinforced concrete in SRC beams needs further research. At present, the installation of large-span SRC beams is cumbersome and the process is complicated. It is urgent to seek a support system that can not only ensure the safe installation of steel-framed structures, but also ensure the integrated and rapid construction of SRC components. Summary of the invention

[0003] The purpose of the present invention is to provide a support system for the integrated construction of SRC beams, so as to solve the problems of complicated installation and complicated procedures of the current large-span SRC beams.

[0004] Another object of the present invention is to provide a construction method of a support system for integrated construction of SRC beams.

[0005] The technical solution of the present invention is: a support system for integrated construction of SRC beams, comprising a plurality of H-shaped steel supports, the H-shaped steel supports are supported between the SRC beam integrated construction template and the steel frame in the SRC beam, and the plurality of H-shaped steel supports are evenly arranged along the length direction of the SRC beam.

[0006] As a further improvement of the present invention, in order to facilitate the installation of the bottom reinforcement of the SRC beam, the cross section of the H-shaped steel support is parallel to the cross section of the steel frame in the SRC beam.

[0007] As a further improvement of the present invention, the ratio of the cross-sectional width of the H-shaped steel support to the cross-sectional width of the steel frame in the SRC beam is 0.5-1: 1. Through force analysis and verification, the cross-sectional width of the H-shaped steel support is too small to meet the bearing capacity requirements, and too large to affect the installation of the SRC beam reinforcement.

[0008] As a further improvement of the present invention, the H-shaped steel support is welded to the bottom of the steel frame in the SRC beam.

[0009] A construction method of a support system for integrated construction of SRC beams, comprising the following steps:

[0010] A. Analyze the SRC beam and its upper load distribution through calculation;

[0011] B. According to the load distribution and force analysis of SRC beams, formulate the design scheme of SRC beam integrated construction support system;

[0012] C. Through the load calculation of the steel frame in the SRC beam and the design of the integrated construction support system of the SRC beam, the number and support position of the H-shaped steel support are reasonably determined according to the principle of matching resistance and endurance;

[0013] D. According to the cross-sectional width of the steel frame in the SRC beam, determine the cross-sectional width of the H-shaped steel support and process it. The ratio of the cross-sectional width of the H-shaped steel support to the cross-sectional width of the steel frame in the SRC beam is required to be 0.5-1:1;

[0014] E. Set up SRC beam integrated construction formwork;

[0015] F. Spot weld the H-beam support to the bottom of the steel frame in the SRC beam according to the arrangement of the H-beam support;

[0016] G. Install the steel frame in the SRC beam;

[0017] H. Carry out integrated construction of steel bars and concrete in SRC beams.

[0018] The beneficial effects of the present invention are as follows: the support system of the present invention has a simple structure, which is convenient for the integrated construction of large-span and large-cantilever SRC beams, and its main advantages are as follows: (1) H-shaped steel supports are helpful for the rapid installation of steel frames in SRC beams, and can ensure the stability and progress requirements of the steel frames in SRC beams; (2) By setting H-shaped steel supports, the upper load of the SRC beam can be evenly transferred to the H-shaped steel supports, which helps the SRC beam integrated construction support system to be evenly stressed, and ensures the stability of the SRC beam integrated construction support system; (3) The use of H-shaped steel supports is helpful for the installation of steel bars and stirrups in SRC beams, which is convenient for construction; (4) The manufacturing process of H-shaped steel supports is simple and reliable. The construction method of the present invention can not only ensure the stability of the installation of steel frames in SRC beams and the uniform stress of the SRC beam integrated construction support system, but also greatly reduce the complexity of the SRC beam integrated construction and ensure construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a longitudinal section view of the support system used for the integrated construction of SRC beams of the present invention;

[0020] Figure 2 It is a cross-sectional view of the support system used for the integrated construction of SRC beams of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the H-shaped steel support in the present invention.

[0022] In the figure: 1-SRC beam; 2-SRC beam steel frame; 3-SRC beam steel bars; 4-H-shaped steel support; 5-SRC beam integrated construction formwork; 6-SRC beam integrated construction support system; DETAILED DESCRIPTION

[0023] The present invention is described in detail below with reference to the accompanying drawings.

[0024] like Figure 1-Figure 3 As shown, a support system for integrated construction of SRC beams includes a plurality of H-shaped steel supports 4, which are supported between an integrated construction template 5 for SRC beams and a steel frame 2 in the SRC beams, and the plurality of H-shaped steel supports 4 are evenly arranged along the length direction of the SRC beams 1. The H-shaped steel supports 4 are made of H-shaped steel.

[0025] The cross section of the H-shaped steel support 4 is parallel to the cross section of the steel frame 2 in the SRC beam. The ratio of the cross section width (a) of the H-shaped steel support 4 to the cross section width (b) of the steel frame 2 in the SRC beam is 0.5-1:1. The H-shaped steel support 4 is welded to the bottom of the steel frame 2 in the SRC beam.

[0026] A construction method of a support system for integrated construction of SRC beams, comprising the following steps:

[0027] A. Analyze the long-span cantilever SRC beam 1 and its upper load distribution through calculation;

[0028] B. Based on the load distribution and force analysis of the long-span cantilever SRC beam 1, a design scheme for a safe and reliable SRC beam integrated construction support system 6 is formulated;

[0029] C. Through the load calculation of the steel frame 2 in the SRC beam and the design scheme of the SRC beam integrated construction support system 6, the number and support point positions of the H-shaped steel supports 4 are reasonably determined according to the principle of matching resistance and endurance;

[0030] D. According to the cross-sectional width of the steel frame 2 in the SRC beam, determine the cross-sectional width of the H-shaped steel support 4 and process it. The ratio of the cross-sectional width of the H-shaped steel support 4 to the cross-sectional width of the steel frame 2 in the SRC beam is required to be 0.5-1:1;

[0031] E. Set up SRC beam integrated construction formwork 5;

[0032] F. Spot weld the H-shaped steel support 4 to the bottom of the steel frame 2 in the SRC beam according to the arrangement of the H-shaped steel support 4;

[0033] G. Install the steel frame 2 in the SRC beam;

[0034] H. Carry out integrated construction of steel bars 3 and concrete in SRC beams.

[0035] Embodiment 1,

[0036] The present invention is used in the Zhaoqing City Planning Exhibition Hall PPP project. This project is located beside Yanyang Lake in the Zhengwen Group of Zhaoqing New District, on the south side of the intersection of the New District Ring Road and Yanyang Road. The total construction area is 15992.77 m2, including 11861.63 square meters above ground and 4131.14 square meters underground, one underground floor and two above ground floors. The total building height is 23.2m.

[0037] The main structure of this project adopts a frame structure, with a design service life of 50 years and an earthquake fortification intensity of 7 degrees. The underground floor is a garage and equipment room with a floor height of 4.3 meters; the two floors above ground are for architectural exhibition and display, one of which has a floor height of 8.1 meters, and a mezzanine with a floor height of 4.5 meters in some parts; the second floor has a slope roof with a slope of 9.8% and a floor height ranging from 5.8m to 12.1m. The main span is 10.5m, and the building is cantilevered obliquely on the north side, with a maximum cantilever length of 24 meters; it is cantilevered obliquely on the south side, with a maximum cantilever length of 15 meters. The cantilever structure mainly adopts a steel truss structure. This project adopts a mixed structure of reinforced concrete structure + local steel structure. The concrete grade of this project is C60 for the main wall, and C35 concrete for the other walls, columns, beams and slabs.

[0038] The project is mainly a reinforced concrete structure, and the north and south ends are steel structures due to the large cantilevers. The maximum cantilever of the south part is 15 meters, and the maximum cantilever of the north part is 24 meters.

[0039] The construction method of this embodiment is as follows:

[0040] A. Modeling and analysis are performed using finite element software to analyze the transmission mode of structural force as the load increases during the construction loading process of the long-span cantilever SRC beam structure, and according to the structural force transmission form, the self-load of the long-span cantilever SRC beam 1 and the total load transmitted by the corresponding upper structure are calculated;

[0041] B. According to the load distribution of the long-span cantilever SRC beam 1 calculated in step A, the force analysis is performed using the Pinming safety calculation software to determine the type and spacing of temporary supports during the construction of the long-span SRC beam structure, and to formulate a plan for erecting an integrated SRC beam construction support system 6 that meets the construction requirements. After safety verification, it is finally determined that the support adopts a φ60*3.2 pan support;

[0042] C. Through force calculation, it is determined that the arrangement spacing of the H-shaped steel support 4 in the long-span cantilever SRC beam 1 is 1.5m; the length of the H-shaped steel support 4 is 20cm, the width is 2 / 3 of the steel frame 2 in the SRC beam, and the height is determined according to the actual size from the bottom of the lower flange of the steel frame 2 in the SRC beam to the bottom of the SRC beam; the web thickness of the H-shaped steel support 4 adopts a 2cm thick steel plate, and the flange adopts a 1.2cm thick steel plate, which can evenly transfer the self-weight load of the steel frame 2 in the SRC beam to the SRC beam integrated construction support system 6 and meet the installation stability of the steel frame 2 in the SRC beam; the height of the H-shaped steel support 4 should take into account the arching of the steel frame 2 in the SRC beam, and the force calculation of the H-shaped steel support 4 only considers the self-weight load of the steel frame 2 in the SRC beam;

[0043] D. Through the force calculation in step C, it is determined that the web thickness of the H-shaped steel support 4 in the large-span cantilever SRC beam 1 of this project is 2cm thick steel plate, and the flange is 1.2cm thick steel plate. They are arranged along the SRC beam 1 with a spacing of 1.5m. The length of the H-shaped steel support 4 is 20cm, and the width is 2 / 3 of the steel frame 2 in the SRC beam, which can meet the construction requirements; When the H-shaped steel support 4 is arranged along the SRC beam 1, the H-shaped steel support 4 at the beam end is ensured to be 500mm away from the SRC beam end to ensure that the anchoring of the steel bars 3 in the SRC beam meets the requirements and facilitates the installation of the steel bars 3 in the SRC beam;

[0044] E. ...

[0045] F. Spot weld the H-shaped steel support 4 to the bottom of the steel frame 2 in the SRC beam according to the arrangement of the H-shaped steel support 4; the H-shaped steel support 4 should be welded before the steel frame 2 in the SRC beam is hoisted;

[0046] G. Install the steel frame 2 in the SRC beam;

[0047] H. Carry out integrated construction of steel bars 3 and concrete in SRC beams.

[0048] The support system of the present invention has a simple structure, is convenient for the integrated construction of large-span and large-cantilever SRC beams, and realizes the rapid installation of the steel frame in the SRC beam. According to the cantilever span of the cantilever SRC beam 1 and the size of its own load, the present invention determines the structure and spacing of the SRC beam integrated construction support system 6 through force calculation, and then evenly arranges H-shaped steel supports 4 at the bottom of the steel frame 2 in the SRC beam according to the load distribution of the SRC beam 1, so that the structural load of the steel frame 2 in the SRC beam is evenly transferred to the SRC beam integrated construction support system 6, which is convenient for the integrated construction of the steel frame 2 in the SRC beam and the steel bars 3 in the SRC beam and the concrete structure, and can also ensure the safety of the structural installation of the steel frame 2 in the SRC beam during the construction of the SRC beam 1, and improve the installation accuracy of the steel frame structure. The present invention facilitates the installation of the bottom steel bars in the SRC beam and facilitates the integrated construction of the SRC beam.

Claims

1. A construction method for a support system for integrated construction of SRC beams, characterized in that: The support system for the integrated construction of SRC beams comprises a plurality of H-shaped steel supports (4), wherein the H-shaped steel supports (4) are supported between an integrated construction template (5) of the SRC beam and a steel frame (2) in the SRC beam, and the plurality of H-shaped steel supports (4) are evenly arranged along the length direction of the SRC beam (1); The method comprises the following steps: A. Analyze the SRC beam (1) and its upper load distribution by calculation; B. Based on the load distribution and force analysis of the SRC beam (1), formulate a design plan for the SRC beam integrated construction support system (6); C. By calculating the load of the steel frame (2) in the SRC beam and designing the integrated construction support system (6) of the SRC beam, the number and support point positions of the H-shaped steel supports (4) are reasonably determined according to the principle of matching resistance and endurance; D. According to the cross-sectional width of the steel frame (2) in the SRC beam, the cross-sectional width of the H-shaped steel support (4) is determined and processed, and the ratio of the cross-sectional width of the H-shaped steel support (4) to the cross-sectional width of the steel frame (2) in the SRC beam is required to be 0.5-1:1; E. Set up SRC beam integrated construction formwork (5); F. Spot-weld the H-shaped steel support (4) to the bottom of the steel frame (2) in the SRC beam according to the arrangement of the H-shaped steel support (4); G. Install the steel frame (2) in the SRC beam; H. Carry out integrated construction of steel bars (3) and concrete in SRC beams.

2. The construction method of a support system for integrated construction of SRC beams according to claim 1, characterized in that: The cross section of the H-shaped steel support (4) is parallel to the cross section of the steel frame (2) in the SRC beam.

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