Formwork hanging device for cast-in-place concrete laminated slab of steel-concrete laminated beam

Abstract

The utility model relates to a suspended formwork device for cast-in-place concrete laminated slabs of steel-concrete laminated beams, which comprises a bottom bearing main beam, an upper bearing main beam and bottom formwork assemblies, and the bottom formwork assemblies stretch across below side wings between two adjacent laminated beams along the width direction of the laminated beams and are sequentially arranged along the length direction of the laminated beams; the bottom bearing main beams are sequentially arranged in the length direction of the superposed beam and located at the two ends of the lower portion of the bottom die assembly. The upper bearing main beam stretches across the upper portions of the side wings between the two adjacent laminated beams in the width direction of the laminated beams, and temporary supporting blocks are installed between the two ends of the upper bearing main beam and the upper portions of the side wings of the laminated beams. The two ends of each bottom bearing main beam correspond to one upper bearing main beam respectively, and two suspension assemblies are installed between the bottom bearing main beams and the upper bearing main beams. The utility model has the advantages that the construction convenience and efficiency are obviously improved, the processing is convenient, and the benefit is obvious.

Description

Technical Field

[0001] This utility model belongs to the field of engineering construction technology, and in particular relates to a formwork lifting device for cast-in-place concrete composite slabs of steel-concrete composite beams. Background Technology

[0002] Generally, for steel-concrete composite beams, the cast-in-place concrete composite slab uses a combination of square timber, bamboo plywood, and M12 threaded rods as the bottom formwork for the void concrete (hereinafter referred to as void concrete) between the steel beams. Due to the low strength of the main square timber beams, the threaded rods are typically spaced 50cm to 80cm for denser support. After the formwork is removed, the threaded rod holes in the composite slab are usually sealed with pressure-reducing material. The following problems may arise during bridge construction and operation / maintenance:

[0003] 1) Water leakage and poor appearance: When using the traditional suspended formwork process, due to the large number of screw holes, water leakage occurs between asphalt layers through some screw holes during operation;

[0004] 2) Significant material waste: The temporary supports for the suspended formwork, which rests on the top slab of the composite beam, are spaced at the same intervals as the tie rods. After construction, these temporary supports are permanently embedded in the concrete composite slab. Due to the small tie rod spacing in traditional suspended formwork technology, a large number of temporary supports are required, resulting in significant waste. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a formwork device for cast-in-place concrete composite slabs of steel-concrete composite beams. This solves the problem that when the bottom formwork for the gap between the steel beams of cast-in-place concrete composite slabs of steel-concrete composite beams is made using the traditional formwork process, the screw holes are numerous, which can easily lead to water leakage and serious material waste.

[0006] The purpose of this utility model is achieved through the following technical solution: A formwork device for cast-in-place concrete composite slabs of steel-concrete composite beams includes a bottom load-bearing main beam, an upper load-bearing main beam, and a bottom formwork assembly. The bottom formwork assembly spans across the width of the composite beam below the side flange between two adjacent composite beams, and the bottom formwork assembly is arranged sequentially along the length of the composite beam. Several bottom load-bearing main beams are provided and arranged sequentially along the length of the composite beam, with the bottom load-bearing main beams located at the lower ends of the bottom formwork assembly. The upper load-bearing main beam spans across the width of the composite beam above the side flange between two adjacent composite beams, and temporary support blocks are installed between the two ends of the upper load-bearing main beam and the side flange of the composite beam. Each end of the bottom load-bearing main beam corresponds to one upper load-bearing main beam, and two suspension assemblies are installed between the bottom load-bearing main beam and the upper load-bearing main beam.

[0007] The beneficial effects of this utility model are as follows: Compared with the prior art, by setting up upper and lower load-bearing main beams, and with each end of the bottom load-bearing main beam corresponding to an upper load-bearing main beam, the spacing between the suspension components is greatly increased compared with the traditional suspended formwork process, which reduces the support system accordingly and greatly improves the convenience and efficiency of construction; the appearance of the void concrete after molding is good, without common quality defects such as leakage, honeycombing, and pitting; the number of tie rod holes is nearly 90% less than that of the traditional suspended formwork process, greatly reducing the probability of water leakage from tie rod holes, resulting in particularly significant quality benefits; and all materials are conventional bulk materials on the market, which are easy to purchase, easy to process, and have low investment costs.

[0008] Preferably, the bottom formwork assembly includes square timber and bamboo plywood. The length of the square timber and the width of the bamboo plywood are both greater than the gap between two adjacent composite beams. Several square timbers are provided and are distributed at equal intervals along the length of the composite beams. The bamboo plywood covers the square timbers and abuts against the edges of the composite beams. With the above structure, not only is forming convenient, but installation with the edges of the composite beams is also convenient, greatly improving the convenience and efficiency of construction.

[0009] Preferably, both the bottom load-bearing main beam and the upper load-bearing main beam are constructed by splicing two double-splitting I-beams, and the bottom load-bearing main beam and the upper load-bearing main beam are arranged in a cross shape. Using two double-splitting I-beams for construction not only ensures strength but also facilitates forming and greatly reduces costs. Furthermore, the cross-shaped distribution makes the forming more stable under stress.

[0010] Preferably, both the bottom load-bearing main beam and the upper load-bearing main beam are provided with through holes, and the suspension assembly passes through the through holes and clamps the bottom load-bearing main beam and the upper load-bearing main beam; the above structure facilitates the installation of the suspension assembly with the bottom load-bearing main beam and the upper load-bearing main beam.

[0011] Preferably, the suspension assembly includes a tie rod, a steel plate, and a nut. The tie rod is inserted through the insertion hole and is attached to the bottom load-bearing main beam and the upper load-bearing main beam by the steel plate and tightened with the nut. The suspension assembly facilitates installation and greatly improves construction convenience and efficiency.

[0012] Preferably, the temporary support block is located at the junction of the edge of the composite beam and the main body; this concentrates the stress on the temporary support block at the junction of the edge of the composite beam and the main body, making the formwork device more stable during construction.

[0013] Preferably, the temporary support block is an I-beam, and the web of the temporary support block is provided with a vertical U-shaped hole for the reinforcing bars of the composite slab to pass through. The temporary support block with the vertical U-shaped hole facilitates the passage of the reinforcing bars of the composite slab and will not affect the insertion of the reinforcing bars during the pouring of the composite slab due to the setting of the temporary support block. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of the hoisting formwork device of this utility model.

[0015] Figure 2 yes Figure 1 A schematic diagram of the AA cross-sectional structure.

[0016] Figure 3 yes Figure 1 A schematic diagram of the BB cross-sectional structure.

[0017] Figure 4 This is a schematic diagram of the main structure of the temporary support block of this utility model.

[0018] The labels in the attached diagram are as follows: 1. Bottom load-bearing main beam; 2. Upper load-bearing main beam; 3. Bottom formwork assembly; 4. Composite beam; 5. Temporary support block; 6. Suspension assembly; 31. Square timber; 32. Bamboo plywood; 41. Side wing; 42. Main body; 43. Intersection point; 51. Web plate; 52. Vertical U-shaped hole; 61. Tie rod; 62. Steel plate; 63. Nut. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings: as shown in the drawings Figures 1 to 4 As shown, this utility model includes a bottom load-bearing main beam 1, an upper load-bearing main beam 2, and a bottom formwork assembly 3. The bottom formwork assembly 3 spans across the width direction of the composite beam 4 below the side wing 41 between two adjacent composite beams 4, and the bottom formwork assembly 3 is arranged sequentially along the length direction of the composite beam 4. The bottom load-bearing main beam 1 has several members arranged sequentially along the length direction of the composite beam 4, and the bottom load-bearing main beam 1 is located at both ends below the bottom formwork assembly 3. The upper load-bearing main beam 2 spans across the width direction of the composite beam 4 above the side wing 41 between two adjacent composite beams 4, and temporary support blocks 5 are installed between the two ends of the upper load-bearing main beam 2 and the side wing 41 of the composite beam 4. Each end of the bottom load-bearing main beam 1 corresponds to one upper load-bearing main beam 2, and two suspension components 6 are installed between the bottom load-bearing main beam 1 and the upper load-bearing main beam 2.

[0020] The bottom formwork assembly 3 includes square timber 31 and bamboo plywood 32. The length of the square timber 31 and the width of the bamboo plywood 32 are both greater than the gap between two adjacent composite beams 4. Several square timbers 31 are arranged sequentially and evenly spaced along the length of the composite beams 4, with a spacing of 20cm between the square timbers 31. The bamboo plywood 32 covers the sequentially distributed square timbers 31 and abuts against the edge 41 of the composite beams 4. The square timber 31 has dimensions of 5cm × 8cm and a length greater than the gap between two adjacent composite beams 4. The bamboo plywood 32 has a thickness of 1.5cm and is assembled sequentially along the length of the composite beams 4 to form the bottom formwork assembly 3.

[0021] Both the bottom load-bearing main beam 1 and the upper load-bearing main beam 2 are constructed by splicing two double-splitting I-beams, and the bottom load-bearing main beam 1 and the upper load-bearing main beam 2 are arranged in a cross shape. Both the bottom load-bearing main beam 1 and the upper load-bearing main beam 2 are provided with through holes, through which the suspension component 6 passes and clamps the bottom load-bearing main beam 1 and the upper load-bearing main beam 2. The suspension component 6 includes a tie rod 61, a steel plate 62 and a nut 63. The tie rod 61 is inserted through the through hole and is attached to the bottom load-bearing main beam 1 and the upper load-bearing main beam 2 through the steel plate 62 and is tightened and fixed by the nut 63.

[0022] The I-beams used for both the bottom load-bearing main beam 1 and the upper load-bearing main beam 2 are 6m long, and the through holes are 26mm diameter round holes. In order to ensure the aesthetic shape of the gap concrete after casting and to avoid quality problems such as grout leakage during the casting process, the maximum deflection of the bottom load-bearing main beam 1 at mid-span is controlled to be less than 1.5mm. Therefore, the spacing between tie rod holes is no more than 5m.

[0023] The temporary support block 5 is located at the junction 43 between the side wing 41 and the main body 42 of the composite beam 4. The temporary support block 5 is an I-beam, and the web 51 of the temporary support block 5 has a vertical U-shaped hole 52 for the reinforcing bars of the composite slab to pass through. The width of the vertical U-shaped hole 52 is 3.5cm and the height is 28cm to facilitate the passage of the reinforcing bars of the composite slab.

[0024] The installation process of this utility model is as follows: First, a bottom formwork component 3 is made, that is, square timber 31 is arranged sequentially at a spacing of 20cm at the bottom of bamboo plywood 32, and bamboo plywood 32 is spliced ​​sequentially and arranged along the length direction of the composite beam 4, and located below the side wing 41 between two adjacent composite beams 4; then, the bottom load-bearing main beam 1 is arranged along the length direction of the composite beam 4, and temporary support blocks 5 are arranged along the length direction of the composite beam 4, with one block every 5m or less; finally, the upper load-bearing main beam 2 is placed between two corresponding temporary support blocks 5, and two suspension components 6 are inserted and fixed between the upper load-bearing main beam 2 and the bottom load-bearing main beam 1.

[0025] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A formwork device for cast-in-place concrete composite slabs of steel-concrete composite beams, comprising a bottom load-bearing main beam (1), an upper load-bearing main beam (2), and a bottom formwork assembly (3), characterized in that: The bottom formwork assembly (3) spans across the width direction of the composite beam (4) below the side wing (41) between two adjacent composite beams (4), and the bottom formwork assembly (3) is arranged sequentially along the length direction of the composite beam (4); the bottom load-bearing main beam (1) is provided with several beams and is arranged sequentially along the length direction of the composite beam (4), and the bottom load-bearing main beam (1) is located at the lower ends of the bottom formwork assembly (3); the upper load-bearing main beam (2) spans across the width direction of the composite beam (4) above the side wing (41) between two adjacent composite beams (4), and temporary support blocks (5) are installed between the two ends of the upper load-bearing main beam (2) and the side wing (41) of the composite beam (4); each end of the bottom load-bearing main beam (1) corresponds to one upper load-bearing main beam (2), and two suspension assemblies (6) are installed between the bottom load-bearing main beam (1) and the upper load-bearing main beam (2).

2. The formwork lifting device for cast-in-place concrete composite slabs of steel-concrete composite beams according to claim 1, characterized in that: The bottom formwork assembly (3) includes square timber (31) and bamboo plywood (32). The length of the square timber (31) and the width of the bamboo plywood (32) are both greater than the gap between two adjacent composite beams (4). The square timber (31) is provided in several pieces and is distributed at equal intervals along the length direction of the composite beam (4). The bamboo plywood (32) covers the square timber (31) distributed in sequence and abuts against the side wing (41) of the composite beam (4).

3. The formwork lifting device for cast-in-place concrete composite slabs of steel-concrete composite beams according to claim 1, characterized in that: The bottom load-bearing main beam (1) and the upper load-bearing main beam (2) are both constructed by splicing two double-splitting I-beams, and the bottom load-bearing main beam (1) and the upper load-bearing main beam (2) are arranged in a cross shape.

4. The formwork lifting device for cast-in-place concrete composite slabs of steel-concrete composite beams according to claim 3, characterized in that: Both the bottom load-bearing main beam (1) and the upper load-bearing main beam (2) are provided with through holes. The suspension assembly (6) passes through the through holes and clamps the bottom load-bearing main beam (1) and the upper load-bearing main beam (2).

5. The formwork lifting device for cast-in-place concrete composite slabs of steel-concrete composite beams according to claim 4, characterized in that: The suspension assembly (6) includes a tie rod (61), a steel plate (62) and a nut (63). The tie rod (61) is inserted through the insertion hole and is attached to the bottom load-bearing main beam (1) and the upper load-bearing main beam (2) through the steel plate (62) and is tightened and fixed by the nut (63).

6. The formwork lifting device for cast-in-place concrete composite slabs of steel-concrete composite beams according to claim 1, characterized in that: The temporary support block (5) is located at the junction (43) between the side wing (41) and the main body (42) of the composite beam (4).

7. The formwork lifting device for cast-in-place concrete composite slabs of steel-concrete composite beams according to claim 6, characterized in that: The temporary support block (5) is an I-beam, and the web (51) of the temporary support block (5) has a vertical U-shaped hole (52) through which the reinforcing bars for casting the composite slab pass.

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