An assembled reinforced concrete beam structure and manufacturing method

Abstract

The present invention discloses an assembled reinforced concrete beam structure and method. Skeleton steel bars are penetrated at four corners inside the concrete beam formwork. A plurality of stirrup groups are arranged inside the concrete beam formwork. The stirrup groups are arranged parallel to the concrete beam formwork. The bottom of the stirrup groups is fixedly connected to the skeleton steel bars, and the upper parts of the stirrup groups extend out of the concrete beam formwork. Opposite grooves are provided at both ends of the bottom of the concrete beam formwork, and the grooves extend to the bottom of the stirrup groups. The concrete beam formwork is provided with a through groove with an open top, and the through groove and the stirrup groups enclose a cavity body. Fixed steel bar groups are fixedly installed at four corners inside the cavity body. The overall structure of the present invention is simple, convenient for production and construction, and has good overall mechanical properties.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and specifically to a prefabricated reinforced concrete beam structure and manufacturing method. Background Art

[0002] A reinforced concrete beam is a beam made of reinforced concrete material. A reinforced concrete beam can be made into an independent beam, or can form an integral beam-slab floor together with a reinforced concrete slab, or form an integral single-story or multi-story frame together with reinforced concrete columns. There are various forms of reinforced concrete beams, which are the most basic load-bearing members in engineering structures such as building construction and bridge construction, and have a very wide range of applications.

[0003] Reinforced concrete beams are important horizontal members in civil engineering structures. The existing technologies are mainly divided into ordinary cast-in-place reinforced concrete beams, precast composite beams, and precast hollow beams.

[0004] The construction process of an ordinary cast-in-place reinforced concrete beam is roughly as follows: At the construction site, horizontal steel bars and stirrups are first tied to form a steel bar cage, and formwork is installed around the beam section. Then, concrete is poured into the formwork. After the concrete sets and reaches a certain strength, the formwork around the beam is removed to form an integral reinforced concrete beam. This construction process has been developed for many years and is very mature, but there are a large number of on-site manual operations such as steel bar tying, formwork erection and removal, with complex processes and long construction periods.

[0005] For precast composite beams, most of the concrete and steel bars are poured and fixed in the factory. After being transported to the construction site, they are installed by hoisting. Since the solid precast reinforced concrete beam is heavy, it increases the transportation cost and causes great difficulties in hoisting. In addition, the steel bars of precast composite beams are mainly connected by bent anchors, sleeves, and post-cast concrete, with complex structures and poor integrity of the structure.

[0006] The main disadvantages of existing precast hollow beams are that the steel bar cage has a complex structure, and it is not completely placed inside the concrete shell, with many mold openings, which is not convenient for its installation and removal. Even multiple flips are required during production, and the production efficiency needs to be improved.

[0007] Therefore, designing a prefabricated reinforced concrete beam and manufacturing method with a simple structure, convenient production and construction, and good overall mechanical properties has become the direction of further improvement. Summary of the Invention

[0008] To solve the above technical problems, the present invention provides a prefabricated reinforced concrete beam structure and method. To achieve the above object, the present invention adopts the following technical solutions:

[0009] An assembled reinforced concrete beam structure, characterized in that: it includes a concrete beam formwork, a stirrup group, a framework steel bar, and a fixed steel bar group. Framework steel bars are inserted through the four corners inside the concrete beam formwork; multiple stirrup groups are arranged inside the concrete beam formwork. The stirrup groups are arranged parallel to the concrete beam formwork. The bottom of the stirrup groups is fixedly connected to the framework steel bars, and the upper parts of the stirrup groups extend out of the concrete beam formwork; opposite grooves are provided at both ends of the bottom of the concrete beam formwork, and the grooves extend to the bottom of the stirrup groups; a through groove with an open top is provided on the concrete beam formwork, and the through groove and the stirrup groups enclose a cavity body, and fixed steel bar groups are fixedly installed at the four corners inside the cavity body.

[0010] Preferably, the lower parts of the concrete beam formwork, the framework steel bars, and the stirrup groups are integrally formed by concrete pouring.

[0011] Preferably, the fixed steel bar group includes a long-through bar in the beam and a movable steel bar. The two corners at the bottom of the through groove and the two inner corners at the upper ends of the stirrup groups are respectively penetrated and fixed with long-through bars in the beam. The connection points of the long-through bars in the beam with the through groove or the stirrup groups are fixed by welding or binding; movable steel bars are fixed inside the long-through bars in the beam. The movable steel bars are respectively fixed at both ends of the long-through bars in the beam, and the connection points between the movable steel bars and the long-through bars in the beam are fixed by binding.

[0012] Preferably, the groove also extends to the bottom of the long-through bar in the beam fixedly connected to the through groove, and the bottom of the long-through bar in the beam is fixed to the groove by welding or binding.

[0013] Preferably, the stirrup group includes transverse steel bars and longitudinal steel bars. The transverse steel bars and the longitudinal steel bars are welded into a rectangular structure. A framework steel bar is clamped between the lower surface of the transverse steel bars arranged inside the concrete beam formwork and the outside of the longitudinal steel bars, and the lower end surface of the framework steel bar is higher than or flush with the lower end surface of the longitudinal steel bars.

[0014] The present invention also provides a manufacturing method for an assembled reinforced concrete beam structure, characterized in that: it is applied to an assembled reinforced concrete beam structure as described above, and includes the following steps:

[0015] S1. Weld the transverse steel bars and the longitudinal steel bars into a stirrup group with a rectangular structure, and arrange multiple groups side by side along the length direction of the concrete beam;

[0016] S2. Affix the two bottom corners and the sides of the stirrup group to the framework steel bars;

[0017] S3. Form the concrete beam formwork by one-time pouring of concrete. The concrete beam formwork is in a trough-shaped structure with three sides enclosed and an open top, covering the stirrup group and the framework steel bars, and the upper ends of the stirrup groups extend out of the concrete beam;

[0018] S4. Grooves are provided at both ends of the concrete beam formwork, so that the transverse steel bars at the bottom of the stirrup groups at both ends of the concrete beam are exposed at the grooves.

[0019] S5.1. Install the long-through beam bars at the two corners at the bottom of the through groove. The long-through beam bars are welded or tied and fixed to the stirrup groups exposed at the grooves.

[0020] S5.2. Install the long-through beam bars inside the upper ends of the stirrup groups. The long-through beam bars are tied and fixed to the upper ends of the stirrup groups.

[0021] S6. Hoist and place it in position at the construction site, then pull the movable steel bars into the cavity and fix them. Finally, pour the post-cast concrete into the cavity and above the cavity without formwork to complete the production of the precast reinforced concrete beam.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The present invention reduces the on-site steel bar tying and formwork erection and removal processes; compared with the precast composite beam, the present invention reduces the weight of the precast components, saves transportation and hoisting costs, and the post-cast concrete and the precast components are cast into a whole on-site, with good structural performance; compared with the existing precast hollow beam, this invention optimizes the structural form of the steel cage, the spatial position relationship between the steel cage and the concrete beam formwork, and the structure of the concrete beam formwork, making the mold structure simple during the production of concrete beam components, without the need for flipping during the production process, simplifying the production process, and improving the production efficiency; and realizing concrete pouring without formwork during the construction link.

[0024] (2) The present invention is simple as a whole, convenient for production and construction, and has good overall mechanical properties, with good engineering advantages and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a sectional view along the end of the concrete beam formwork of the present invention.

[0026] Figure 2 It is a sectional view along the middle of the concrete beam formwork of the present invention.

[0027] Figure 3 It is a schematic diagram of the overall structure of the present invention.

[0028] Figure 4 It is a schematic diagram of the structure of the concrete beam formwork of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0029] The present invention will be further described below in conjunction with the drawings and the specific embodiments.

[0030] As Figures 1 to 4As shown, a prefabricated reinforced concrete beam structure and method, including a concrete beam formwork 1, stirrup groups 2, transverse steel bars 201, longitudinal steel bars 202, framework steel bars 3, grooves 4, through grooves 5, full-length steel bars 6 inside the beam and movable steel bars 7.

[0031] Framework steel bars 3 are penetrated at the four corners inside the concrete beam formwork 1; multiple stirrup groups 2 are arranged inside the concrete beam formwork 1, the stirrup groups 2 are arranged parallel to the concrete beam formwork 1, the bottom of the stirrup groups 2 is fixedly connected to the framework steel bars 3, and the upper part of the stirrup groups 2 extends out of the concrete beam formwork 1; opposite grooves 4 are provided at both ends of the bottom of the concrete beam formwork 1, and the grooves 4 extend to the bottom of the stirrup groups 2; the concrete beam formwork 1 is provided with a through groove 5 with an open top, and the through groove 5 and the stirrup groups 2 enclose a cavity body, and fixed steel bar groups are fixedly installed at the four corners inside the cavity body. After the concrete beam formwork 1 is transported to the construction site and concrete is poured, a concrete beam can be formed. The overall structure of the concrete beam formwork is light, easy to form and transport, can improve the construction efficiency of the concrete beam, and can improve the overall mechanical properties.

[0032] The lower parts of the concrete beam formwork 1, the framework steel bars 3 and the stirrup groups 2 are integrally formed by concrete pouring.

[0033] The fixed steel bar group includes full-length steel bars 6 inside the beam and movable steel bars 7. Full-length steel bars 6 inside the beam are respectively penetrated and fixed at the two corners at the bottom of the through groove 5 and the two inner corners at the upper end of the stirrup groups 2, and the connection points of the full-length steel bars 6 inside the beam with the through groove 5 or the stirrup groups 2 are fixed by welding or binding; movable steel bars 7 are fixed inside the full-length steel bars 6 inside the beam, the movable steel bars 7 are respectively fixed at both ends of the full-length steel bars 6 inside the beam, and a gap is left between the movable steel bars 7 at both ends to facilitate the final pouring of concrete to form. The connection points between the movable steel bars 7 and the full-length steel bars 6 inside the beam are fixed by binding.

[0034] The groove 4 also extends to the bottom of the full-length steel bar 6 inside the beam fixedly connected to the through groove 5, and the bottom of the full-length steel bar 6 inside the beam is fixedly connected to the groove 4 by welding or binding.

[0035] The stirrup group 2 includes transverse steel bars 201 and longitudinal steel bars 202. The transverse steel bars 201 and the longitudinal steel bars 202 are fixed into a rectangular structure by welding. A framework steel bar 3 is clamped between the lower surface of the transverse steel bars 201 arranged inside the concrete beam formwork 1 and the outside of the longitudinal steel bars 202. The lower end surface of the framework steel bar 3 is higher than or flush with the lower end surface of the longitudinal steel bars 202. The framework steel bar 3 restricts and locates the position between the stirrup group 2 and the concrete beam formwork 1, and enhances the stability after overall pouring.

[0036] A manufacturing method of a prefabricated reinforced concrete beam structure, applied to the prefabricated reinforced concrete beam structure in the above embodiment, includes the following steps:

[0037] S1. Weld the transverse steel bars 201 and longitudinal steel bars 202 into stirrup groups 2 with a rectangular structure, and arrange multiple groups side by side along the length direction of the concrete beam.

[0038] S2. Affix the framework steel bars 3 to the bottom two corners and the sides of the stirrup groups 2.

[0039] S3. Form the concrete beam formwork by pouring concrete at one time. The concrete beam formwork 1 has a trough-shaped structure that is enclosed on three sides and open at the top, covering the stirrup groups 2 and the framework steel bars 3, and the upper ends of the stirrup groups 2 protrude from the concrete beam.

[0040] S4. Grooves 4 are provided at both ends of the concrete beam formwork 1, so that the transverse steel bars 201 at the bottom of the stirrup groups 2 at both ends of the concrete beam are exposed at the grooves 4.

[0041] S5.1. Install the full-length beam bars 6 at the bottom two corners of the through groove 5, and weld or tie and fix the full-length beam bars 6 to the stirrup groups 2 exposed at the grooves 4.

[0042] S5.2. Install the full-length beam bars 6 inside the upper ends of the stirrup groups 2, and tie and fix the full-length beam bars 6 to the upper ends of the stirrup groups 2.

[0043] S6. Hoist and place it in position at the construction site, then pull the movable steel bars 7 into the cavity and fix them. Finally, pour the post-cast concrete into the cavity and above the cavity without formwork to complete the production of the prefabricated reinforced concrete beam.

[0044] The reinforced concrete beam structure produced in this way does not require on-site steel bar binding and formwork erection and removal processes. Compared with precast composite beams, the present invention reduces the weight of precast components, saves transportation and hoisting costs, and the post-cast concrete and precast components are cast into a whole on-site, with good structural performance; compared with the existing precast hollow beams, this invention optimizes the structural form of the steel reinforcement cage, the spatial position relationship between the steel reinforcement cage and the concrete beam formwork, and the structure of the concrete beam formwork, making the mold structure simple during the production of concrete beam components, without the need for flipping during the production process, simplifying the production process, and improving production efficiency; and realizing formwork-free concrete pouring in the construction link, with good engineering advantages and economic benefits as a whole.

[0045] The above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of rights of the present invention. Therefore, modifications, equivalent changes, improvements, etc. made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. An assembled reinforced concrete beam structure, comprising a concrete beam formwork (1), a stirrup group (2), a framework steel bar (3) and a fixed steel bar group. The framework steel bars (3) are penetrated through the four corners inside the concrete beam formwork (1); multiple stirrup groups (2) are arranged inside the concrete beam formwork (1), the stirrup groups (2) are arranged parallel to the concrete beam formwork (1), the bottom of the stirrup groups (2) is fixedly connected to the framework steel bars (3), and the upper parts of the stirrup groups (2) extend out of the concrete beam formwork (1); opposite grooves (4) are provided at both ends of the bottom of the concrete beam formwork (1), and the grooves (4) extend to the bottom of the stirrup groups (2); a through groove (5) with an open top is provided on the concrete beam formwork (1), and the through groove (5) and the stirrup groups (2) enclose a cavity body, and fixed steel bar groups are fixedly installed at the four corners inside the cavity body; the stirrup group (2) comprises a transverse steel bar (201) and a longitudinal steel bar (202), the transverse steel bar (201) and the longitudinal steel bar (202) are fixedly welded into a rectangular structure, and a framework steel bar (3) is clamped between the lower surface of the transverse steel bar (201) arranged inside the concrete beam formwork (1) and the outside of the longitudinal steel bar (202), and the lower end surface of this framework steel bar (3) is higher than or flush with the lower end surface of the longitudinal steel bar (202); the lower parts of the concrete beam formwork (1), the framework steel bars (3) and the stirrup groups (2) are integrally formed by concrete pouring; the fixed steel bar group comprises a full-length bar (6) inside the beam and a movable steel bar (7), the two corners at the bottom of the through groove (5) and the two corners at the inner side of the upper end of the stirrup group (2) are respectively penetrated and fixed with the full-length bar (6) inside the beam, and the connection points of the full-length bar (6) inside the beam and the stirrup group (2) are fixed by welding or binding; a movable steel bar (7) is fixed inside the full-length bar (6) inside the beam, the movable steel bars (7) are respectively fixed at both ends of the full-length bar (6) inside the beam, and the connection points between the movable steel bar (7) and the full-length bar (6) inside the beam are fixed by binding; the groove (4) also extends to the bottom of the full-length bar (6) inside the beam fixedly connected to the through groove (5), and the bottom of this full-length bar (6) inside the beam and the stirrup group (2) exposed at the groove (4) are fixed by welding or binding.

2. A manufacturing method of an assembled reinforced concrete beam structure, characterized in that: applied to an assembled reinforced concrete beam structure as described in claim 1, comprising the following steps: S1. Weld the transverse steel bar (201) and the longitudinal steel bar (202) into a rectangular stirrup group (2), and arrange multiple groups side by side along the length direction of the concrete beam; S2. Stick the two corners at the bottom and the side of the stirrup group (2) to the framework steel bar (3); S3. Form the concrete beam formwork (1) by one-time concrete pouring. The concrete beam formwork (1) is in a trough-shaped structure surrounded by three sides with an open top, covering the stirrup group (2) and the framework steel bar (3), and the upper end of the stirrup group (2) extends out of the concrete beam; S4. Grooves (4) are provided at both ends of the concrete beam formwork (1), so that the transverse steel bars (201) at the bottom of the stirrup groups (2) at both ends of the concrete beam are exposed at the grooves (4). S5.

1. Install the longitudinal bars (6) in the beam at the two corners at the bottom of the through groove (5), and weld or tie and fix the longitudinal bars (6) in the beam to the stirrup groups (2) exposed at the grooves (4). S5.

2. Install the longitudinal bars (6) in the beam inside the inner side of the upper end of the stirrup group (2), and tie and fix the longitudinal bars (6) in the beam to the upper end of the stirrup group (2). S6. Hoist and place it in place at the construction site, then pull the movable steel bars (7) into the cavity and fix them. Finally, pour the post-cast concrete into the cavity and above the cavity without formwork to complete the production of the prefabricated reinforced concrete beam.

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