A steel reinforced concrete structure beam and a construction method

Abstract

The application discloses a kind of steel reinforced concrete structure beam and construction method, belong to building construction technical field, technical scheme is, a kind of steel reinforced concrete structure beam and construction method, include: when steel beam is in the field, its size, material and surface quality are checked, ensure that it meets design requirement;Before formal installation, the pre-assembly of steel beam is carried out, and the accuracy of connection and size is verified;Flat assembly site, and install special support, hoist steel beam to special support;Steel reinforcement installation support is installed on the upper surface and lower surface of steel beam, and fixed in place;Main reinforcement, tensioning and stirrup are installed on steel beam, and are tied into steel reinforcement cage;Steel reinforcement cage and steel beam are combined into a whole, and lug is welded;The combination is checked, to ensure its structural integrity and welding quality;The combination is hoisted to predetermined position, connected with steel column, and the steel at beam-column joint is arranged.The beneficial effects of the application are: a kind of steel reinforced concrete structure beam and construction method are provided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of building construction, and particularly relates to a steel reinforced concrete structure beam and a construction method. BACKGROUND

[0002] The steel reinforced concrete structure is a main structure form for realizing the functions of large space and large span buildings. The steel and the reinforced concrete cooperatively act and rationally bear stress, can reduce the sectional size of components, increase the available space, and reduce the engineering cost. The construction procedure of the conventional steel reinforced concrete structure is to assemble the steel structure first, and then to construct the procedure of setting up the formwork and binding the reinforcement according to the common cast-in-place structure after the assembly of the steel structure is completed. The construction scheme or method is a prior construction mode. Under the construction mode, the following construction problems are found: 1. After the installation of the steel structure beam, the cast-in-place beam stirrup needs to be pried open and sleeved into the steel beam, which is extremely inconvenient and inefficient in construction. 2. After the installation of the steel structure is completed, the cast-in-place beam reinforcement binding can only be constructed in the high altitude, and there is a risk of high-altitude operation.

[0003] The technical problem to be solved by the application is to solve the problems of inconvenient high-altitude installation construction, low installation efficiency and high risk coefficient in the construction of the conventional large-span steel reinforced concrete beam. SUMMARY

[0004] The purpose of the application is to provide a steel reinforced concrete structure beam and a construction method.

[0005] The application is realized by the following measures: a construction method of a steel reinforced concrete structure beam, characterized by comprising the following steps:

[0006] Steel beam inspection: when the steel beam enters the site, the size, material and surface quality of the steel beam are inspected to ensure that the design requirements are met; the inspection contents include but are not limited to: size inspection: the key sizes such as the length, width and height of the steel beam are measured to ensure that they are consistent with the design drawings. Material inspection: the material certificate of the steel beam is checked to confirm that the chemical composition, mechanical properties and other indicators meet the requirements.

[0007] Surface quality inspection: the surface of the steel beam is inspected to check whether there are defects such as cracks, depressions and rust, and necessary repair or replacement is performed.

[0008] Pre-assembly: before formal installation, the pre-assembly of the steel beam is performed to verify the accuracy of the connection and size; any place that needs to be adjusted should be recorded and corrected before formal installation.

[0009] Assembly site preparation: level the assembly site and install special supports, hoist the steel beam onto the special supports; site leveling: remove debris from the site, level the ground, and if necessary, lay down pads or sleepers to increase support area. Special support fabrication and installation: design appropriate supports based on the shape and size of the steel beam, and accurately position and install them on the site. The supports should have sufficient load-bearing capacity and stability.

[0010] Steel beam hoisting: use appropriate hoisting equipment (such as a crane) to lift the steel beam from the transport vehicle and place it smoothly on the special supports. Pay attention to the balance of the steel beam during hoisting to prevent tilting or collision.

[0011] Rebar installation support setting: install rebar installation supports on the upper and lower surfaces of the steel beam and secure them in place; rebar installation supports provide support and positioning for subsequent rebar binding.

[0012] Rebar installation and binding: install main reinforcement, tie reinforcement, and stirrup reinforcement on the steel beam and bind them into a rebar framework; main reinforcement installation: place the main reinforcement on the supports according to the design drawings and ensure accurate positioning. The spacing and number of rows between main reinforcements should meet the design requirements. Stirrup installation: install stirrups between main reinforcements and secure them to main reinforcements with wire or binding tape. The spacing and number of stirrups should strictly follow the design drawings.

[0013] Rebar framework binding: connect all rebar into a complete framework, ensuring that the connection between each part of the rebar is firm and there is no looseness. At the same time, pay attention to the thickness of the rebar protection layer and use measures such as spacers to control it.

[0014] Assembly connection and lug welding: combine the rebar framework with the steel beam into a whole and weld the lifting lugs;

[0015] Pre-hoisting inspection: inspect the assembly to ensure its structural integrity and welding quality; before hoisting, the entire assembly must be thoroughly inspected to ensure its safety and integrity. The inspection includes:

[0016] Structural integrity: check whether all connection points are firm and whether there are loose or missing parts.

[0017] Welding quality: check whether there are cracks, pores, and other defects at the welding site to ensure that the welding quality meets the standard. Weight and balance: confirm whether the weight of the assembly is within the load-bearing range of the hoisting equipment, and check its balance to prevent tilting during hoisting. Lug inspection: check the welding quality of the lifting lugs to ensure that they can withstand the load during hoisting.

[0018] Hoisting and connection: hoist the assembly to the predetermined position, connect it to the steel column, and arrange the rebar at the beam-column joint.

[0019] Further, the height of the special support is 15 cm, so that the height of the steel beam is not high, and the binding requirement of the steel bar is met.

[0020] Further, the special support is provided with a plurality of special supports along the length direction of the steel beam.

[0021] Further, the special support comprises a support plate and support columns symmetrically arranged at both ends of the support plate, and the width of the support plate is less than the interval of adjacent shear studs on the steel beam.

[0022] Further, the support plate comprises a plate one and a plate two, one end of the plate one is provided with a U-shaped groove, one end of the plate two is provided with a plug-in column one inserted into the U-shaped groove, the lower end surface of the plate two is fixedly provided with a plug-in column two inserted below the plate two, the upper end surfaces of the plate one, the plate two and the plug-in column one are flush, and the upper end surface of the plug-in column two is in contact with the lower end of the plate one.

[0023] Further, the end support structure comprises two symmetrically arranged longitudinal rods, the outer ends of the two longitudinal rods are connected by a connecting rod, the outer sides of the connecting rod are symmetrically provided with inclined supports placed on the ground, the inner ends of the two longitudinal rods are fixedly provided with screw rods, the inner ends of the screw rods pass through the support plates adjacent to the screw rods and are connected by nuts, and the two longitudinal rods are located outside the shear studs of the lower end surface of the steel beam.

[0024] The special support is spliced by the plate one and the plate two, can be well separated from the steel bar binding range after the steel bar binding is completed, the end support structure and the special support are connected by the screw rods to form a whole, and the support stability of the steel beam can be increased. In addition, the two longitudinal rods can be clamped on both sides of the shear studs to avoid the steel beam from falling as much as possible.

[0025] The end support structure and the special support are designed with corresponding counterweights according to actual conditions, or when the special support is spliced, one of the support columns can be directly fixed on the ground by using an expansion screw.

[0026] Further, the side wall of the longitudinal rod is in contact with the side wall of the body of the shear stud.

[0027] Further, the steel beam is an I-beam, and the steel bar mounting support comprises U-shaped plates symmetrically clamped on both sides of the flange plate of the I-beam, and vertical plates facing the outer side of the flange plate are fixedly arranged on the two U-shaped plates.

[0028] In another aspect, the embodiment provides a steel reinforced concrete structure beam, characterized in that comprising an I-beam, the upper end surface of the upper flange plate and the lower end surface of the lower flange plate of the I-beam are provided with two rows of shear studs and are provided with a plurality of steel bar mounting supports along the length direction of the I-beam;

[0029] The upper end surface of the steel bar mounting support on the upper flange plate is fixedly provided with upper main reinforcement, and the lower end surface of the steel bar mounting support on the lower flange plate is fixedly provided with lower main reinforcement, the upper main reinforcement and the lower main reinforcement are provided with a plurality of main reinforcements along the width direction of the I-beam, and the outermost main reinforcement is located outside the I-beam, and both ends of the main reinforcement extend out of the I-beam;

[0030] Both sides of the I-beam are provided with outer longitudinal reinforcement, and the inner longitudinal reinforcement is arranged near the web plate, the inner longitudinal reinforcement is welded on the web plate, and the outer longitudinal reinforcement and the inner longitudinal reinforcement on the same side and at the same horizontal plane of the I-beam are connected by a tie bar; the outer longitudinal reinforcement and the inner longitudinal reinforcement are provided with a plurality of longitudinal reinforcements along the height direction of the I-beam, and both ends of the longitudinal reinforcement extend out of the I-beam;

[0031] It also comprises a stirrup connecting the upper main reinforcement, the outer longitudinal reinforcement and the lower main reinforcement, and the stirrup is provided with a plurality of stirrups along the length direction of the I-beam.

[0032] The I-beam, the steel bar mounting support, the upper main reinforcement, the lower main reinforcement, the outer longitudinal reinforcement, the inner longitudinal reinforcement and the tie bar are all poured in the concrete, and the thickness of the steel reinforcement protective layer is not less than 100mm.

[0033] The steel bar mounting support comprises two U-shaped plates symmetrically clamped on both sides of the flange plate of the I-beam, two vertical plates are fixedly arranged on the two U-shaped plates and face the outside of the flange plate, the outer ends of the two vertical plates are connected by a horizontal plate, and the horizontal plate is located on the outside of the shear stud on the flange plate.

[0034] A plurality of lifting lugs are welded on the I-beam or the steel bar mounting support.

[0035] The technical scheme provided by the embodiment of the application has the beneficial effects that the steel reinforced concrete beam steel pre-installation construction method can effectively solve the inconvenience and low efficiency of the conventional construction method of the stirrup sleeved into the steel beam, and a large amount of steel bar binding work is completed on the ground, reducing the risk of high-altitude operation. This construction method significantly improves construction quality, construction efficiency, and personnel safety, and has simple construction steps and fewer added construction components. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical scheme of the present application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings listed below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0037] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

[0038] Figure 2 is a schematic diagram of the overall structure of an embodiment of the present application; Figure 1 is a partial enlarged view of A in

[0039] Figure 3 is a schematic diagram of the overall structure of an embodiment of the present application; Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

[0040] Figure 4 is a schematic diagram of the overall structure of an embodiment of the present application; Figure 3 is a partial enlarged view of B in

[0041] Figure 5 is a schematic diagram of the overall structure of an embodiment of the present application;

[0042] Figure 6 is a schematic diagram of the overall structure of an embodiment of the present application;

[0043] Figure 7 is a schematic diagram of the overall structure of an embodiment of the present application; Figure 6 is a partial enlarged view of C in

[0044] Figure 8 is a schematic diagram of the overall structure of an embodiment of the present application;

[0045] Figure 9 is a schematic diagram of the overall structure of an embodiment of the present application;

[0046] Figure 10 is a schematic diagram of the overall structure of an embodiment of the present application;

[0047] Figure 11 is a flow chart of a construction method of a steel reinforced concrete structure beam.

[0048] In the drawings, the components represented by each reference numeral are listed as follows: 1, steel beam; 2, steel bar mounting bracket; 3, special bracket; 4, lifting lug; 5, upper main reinforcement; 6, lower main reinforcement; 7, inner longitudinal reinforcement; 8, outer longitudinal reinforcement; 9, tie reinforcement; 10, stirrup; 11, shear bolt; 12, longitudinal rod; 13, connecting rod; 14, diagonal brace; 15, screw rod; 16, nut; 101, upper wing plate; 102, lower wing plate; 103, web plate; 201, U-shaped plate; 202, vertical plate; 203, horizontal plate; 301, support plate; 302, support column; 30101, plate one; 30102, plate two; 30103, U-shaped groove; 30104, insertion column one; 30105, insertion column two. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with embodiments. Of course, the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0050] Embodiment one:

[0051] Referring to Figures 1-11 A construction method of a steel reinforced concrete structure beam, characterized in that, comprising:

[0052] S1, steel beam 1 approach inspection: when the steel beam 1 approaches, check its size, material and surface quality to ensure that it meets the design requirements; the inspection content includes but is not limited to: size inspection: measure the length, width, height and other key dimensions of the steel beam 1 to ensure consistency with the design drawing. Material inspection: check the material certificate of the steel beam 1 to confirm that its chemical composition, mechanical properties and other indicators meet the requirements. Surface quality inspection: check whether the steel beam 1 surface has cracks, depressions, rust and other defects, and repair or replace if necessary.

[0053] S2, pre-assembly: before formal installation, pre-assemble the steel beam 1 to verify the accuracy of the connection and size; any place that needs to be adjusted should be recorded and corrected before formal installation.

[0054] S3, assembly site preparation: level the assembly site and install the special support 3, hoist the steel beam 1 to the special support 3; site leveling: remove debris from the site, level the ground, and lay down a pad or a tie if necessary to increase the support area. Special support 3 manufacturing and installation: according to the shape and size of the steel beam 1, design appropriate support and accurately position and install it on the site, the support should have enough carrying capacity and stability. Steel beam 1 hoisting: use appropriate hoisting equipment (such as crane) to hoist the steel beam 1 from the transport vehicle and place it smoothly on the special support 3. Pay attention to the balance of the steel beam 1 during hoisting to prevent tilting or collision.

[0055] S4, steel bar installation support 2 setting: install the steel bar installation support 2 on the upper and lower surfaces of the steel beam 1 and fix it in place; the steel bar installation support 2 provides support and positioning for subsequent steel bar binding.

[0056] S5, steel bar installation and binding: install main reinforcement, tie bars 9 and stirrups 10 on the steel beam 1, and bind them into a steel reinforcement framework; main reinforcement installation: according to the design drawing, place the main reinforcement on the support, and ensure that its position is accurate. The spacing and number of rows between the main reinforcement should meet the design requirements. Stirrup 10 installation: install the stirrup 10 between the main reinforcement, and fix it on the main reinforcement with a binding wire or a binding belt. The spacing and number of the stirrup 10 should be strictly in accordance with the design drawing. Steel reinforcement framework binding: connect all the steel reinforcements into a whole framework, and ensure that the connection between the steel reinforcements is firm and there is no looseness. At the same time, attention should be paid to the thickness of the protective layer of the steel reinforcement, and measures such as cushion block should be used to control it.

[0057] S6, combination connection and lug 4 welding: combine the steel reinforcement framework with the steel beam 1 into a whole, and weld the lug 4;

[0058] S7, pre-hoisting inspection: inspect the combination to ensure its structural integrity and welding quality; before hoisting, the whole combination must be thoroughly inspected to ensure its safety and integrity. The inspection contents include: structural integrity: check whether all the connection points are firm, and whether there are loose or missing parts. Welding quality: check whether there are cracks, pores and other defects in the welding position, and ensure that the welding quality meets the standard. Weight and balance: confirm whether the weight of the combination is within the carrying range of the hoisting equipment, and check its balance at the same time to prevent tilting during hoisting. Lug 4 inspection: check the welding quality of the lug 4 to ensure that it can withstand the load during hoisting.

[0059] S8, hoisting and connection: hoist the combination to the predetermined position, connect it with the steel column, and arrange the steel reinforcement at the beam-column joint.

[0060] The height of the special support 3 is 15 cm, so that the height of the steel beam 1 is not high, and the binding needs of the steel reinforcement are met.

[0061] The special support 3 is provided with a plurality of special supports 3 along the length direction of the steel beam 1.

[0062] The special support 3 comprises a support plate 301 and support columns 302 symmetrically arranged at both ends of the support plate 301, and the width of the support plate 301 is less than the spacing of adjacent shear studs 11 on the steel beam 1.

[0063] The support plate 301 comprises a plate one 30101 and a plate two, one end of the plate one 30101 is provided with a U-shaped groove, one end of the plate two is provided with a plug column one 30104 inserted into the U-shaped groove, the lower end surface of the plate two is fixedly provided with a plug column two 30105 inserted below the plate one 30101, the upper end surfaces of the plate one 30101, the plate two and the plug column one 30104 are flush, and the upper end surface of the plug column two 30105 is in contact with the lower end of the plate one 30101.

[0064] The end support structure arranged at both ends of the steel beam 1 comprises two symmetrically arranged longitudinal rods 12, outer ends of the two longitudinal rods 12 are connected through a connecting rod 13, outer sides of the connecting rod 13 are symmetrically provided with inclined braces 14 placed on the ground, inner ends of the two longitudinal rods 12 are both fixedly provided with a screw rod 15, the inner end of the screw rod 15 penetrates through an adjacent support plate 301 and is connected through a nut 16, and the two longitudinal rods 12 are located outside the shear dowels 11 of the lower end surface of the steel beam 1.

[0065] The special support 3 is spliced by a plate 30101 and a plate 2, can be conveniently separated from the steel bar binding range after the steel bar binding is completed; the end support structure and the special support 3 are connected through the screw rod 15 to form a whole, and the support stability of the steel beam 1 can be increased. In addition, the two longitudinal rods 12 can be clamped on both sides of the shear dowels 11, so that the steel beam 1 can be prevented from falling as much as possible.

[0066] The end support structure and the special support 3 are designed with corresponding counterweights according to actual conditions, or when the special support 3 adopts a splicing form, one of the support columns 302 can be directly fixed on the ground through an expansion screw.

[0067] The side wall of the longitudinal rod 12 is attached to the body side wall of the shear dowel 11.

[0068] The steel beam 1 is an I-beam, and the steel bar mounting support 2 comprises U-shaped plates 201 symmetrically clamped on both sides of the flange plates of the I-beam, the two U-shaped plates 201 are fixedly provided with vertical plates 202 facing the outer sides of the flange plates, outer ends of the two vertical plates 202 are connected through a horizontal plate 203, and the horizontal plate 203 is located outside the shear dowels 11 on the flange plate.

[0069] Embodiment two:

[0070] Referring to Figures 1-10 The embodiment provides a steel reinforced concrete structure beam, characterized by comprising an I-beam, two rows of shear dowels 11 are arranged on an upper end surface of an upper flange plate 101 and a lower end surface of a lower flange plate 102 of the I-beam, and a plurality of steel bar mounting supports 2 are arranged on the I-beam and are spaced apart along a length direction of the I-beam.

[0071] An upper main reinforcement 5 is fixedly arranged on an upper end surface of the steel bar mounting support 2 located on the upper flange plate 101, a lower main reinforcement 6 is fixedly arranged on a lower end surface of the steel bar mounting support 2 located on the lower flange plate 102, a plurality of upper main reinforcements 5 and lower main reinforcements 6 are arranged along a width direction of the I-beam, and outermost main reinforcements are located outside the I-beam, and both ends of the main reinforcements protrude from the I-beam.

[0072] The outer longitudinal reinforcement 8 is arranged on both sides of the I-shaped steel, the inner longitudinal reinforcement 7 is arranged close to the web plate 103, the inner longitudinal reinforcement 7 is welded on the web plate 103, the outer longitudinal reinforcement 8 and the inner longitudinal reinforcement 7 on the same side and at the same horizontal plane of the I-shaped steel are connected through the tie reinforcement 9; the outer longitudinal reinforcement 8 and the inner longitudinal reinforcement 7 are arranged with several in the height direction of the I-shaped steel and both ends of which extend out of the I-shaped steel;

[0073] The stirrup 10 connecting the upper main reinforcement 5, the outer longitudinal reinforcement 8 and the lower main reinforcement 6 is further included, and the stirrup 10 is arranged with several in the length direction of the I-shaped steel.

[0074] The I-shaped steel, the steel bar mounting bracket 2, the upper main reinforcement 5, the lower main reinforcement 6, the outer longitudinal reinforcement 8, the inner longitudinal reinforcement 7 and the tie reinforcement 9 are all poured in the concrete, and the thickness of the steel bar protection layer is not less than 100 mm.

[0075] The steel bar mounting bracket 2 includes the U-shaped plate 201 symmetrically clamped on both sides of the I-shaped steel wing plate, the vertical plate 202 facing the outer side of the wing plate is fixedly arranged on the two U-shaped plates 201, the outer ends of the two vertical plates 202 are connected through the horizontal plate 203, and the horizontal plate 203 is located on the outer side of the shear bolt 11 on the wing plate.

[0076] The I-shaped steel or the steel bar mounting bracket 2 is welded with several lifting lugs 4.

[0077] The above only describes the preferred embodiment of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A construction method for a steel-concrete structural beam, characterized in that: include: When the steel beams arrive at the site, their size, material and surface quality are checked to ensure they meet the design requirements; Before formal installation, pre-assemble the steel beams to verify the accuracy of connections and dimensions; Level the assembly site, install special brackets, and hoist the steel beams onto the special brackets; Install steel bar mounting brackets on the upper and lower surfaces of the steel beam and secure them in place; Install main reinforcement, tie bars and stirrups on the steel beams and tie them into a steel skeleton; Combine the steel frame and steel beam into a whole and weld the lifting lugs; Inspect the assembly to ensure its structural integrity and welding quality; Hoist the assembly to the predetermined location, connect it to the steel column, and arrange the steel bars at the beam-column joints; The specially made bracket includes a support plate and support columns symmetrically arranged at both ends of the support plate, and the width of the support plate is smaller than the spacing between adjacent shear studs on the steel beam; The support plate includes a first plate and a second plate, one end of the first plate is provided with a U-shaped groove, one end of the second plate is provided with a first plug-in column inserted into the U-shaped groove, the lower end surface of the second plate is fixedly provided with a second plug-in column inserted below the first plate, the upper end surfaces of the first plate, the second plate and the first plug-in column are flush, and the upper end surface of the second plug-in column contacts the lower end of the first plate; It also includes an end support structure provided at both ends of the steel beam, the end support structure including two symmetrically arranged longitudinal rods, the outer ends of the two longitudinal rods being connected by a connecting rod, the outer sides of the connecting rods being symmetrically provided with diagonal braces placed on the ground, the inner ends of the two longitudinal rods being fixedly provided with screws, the inner ends of the screws passing through the adjacent support plates and being connected by nuts, the two longitudinal rods being located outside the shear studs on the lower end surface of the steel beam; The side walls of the longitudinal rod are in contact with the side walls of the body of the shear stud.

2. The construction method of steel-concrete structural beam according to claim 1, characterized in that: The height of the special bracket is 15 cm.

3. The construction method of steel-concrete structural beam according to claim 1, characterized in that: A plurality of the special brackets are arranged along the length direction of the steel beam.

4. The construction method of steel-concrete structural beam according to claim 1, characterized in that: The steel beam is an I-beam, and the steel bar mounting bracket includes a U-shaped plate symmetrically clamped on both sides of the I-beam flange. Vertical plates facing the outside of the flange are fixedly provided on the two U-shaped plates. The outer ends of the two vertical plates are connected by a horizontal plate, and the horizontal plate is located on the outside of the shear studs on the flange.

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