Concrete bridge deck pavement layer formwork device without roof of steel-concrete composite box girder

Abstract

This utility model relates to a formwork support device for the concrete pavement layer of a steel-concrete composite box girder without a top slab. It includes a steel beam, with several pairs of mounting holes on both sides of the top slab of the steel beam. Each pair of mounting holes is arranged sequentially along the length of the steel beam. A threaded steel tie rod is installed and fixed in each mounting hole. A support main beam is installed on each pair of threaded steel tie rods. The support main beam is located above the top slab, with one side extending to the outer side of the web of the steel beam's side beam. Two threaded steel tie rods are installed on the support main beam, and a bottom formwork assembly is installed on each of the two threaded steel tie rods. The bottom formwork assembly is located on the web side of the steel beam's side beam. This utility model has the advantages of simple and convenient construction, reusability, reduced construction period, reduced construction costs, reduced risks associated with high-altitude operations, and reduced environmental pollution from repeated painting.

Description

Technical Field

[0001] This utility model belongs to the field of bridge engineering construction technology, and in particular relates to a formwork support device for the concrete pavement layer of a steel-concrete composite box girder without a top slab. Background Technology

[0002] For the concrete pavement layer of the steel-concrete composite box girder without a top slab, ear plates are installed at the corresponding positions of the vertical stiffening ribs and transverse diaphragms of the side beam web. After the cantilever portion of the side beam bridge deck is poured, a triangular channel steel support system is installed on the ear plates, and a formwork system is installed on the horizontal channel steel to form the formwork system for pouring the concrete pavement layer of the steel-concrete composite box girder without a top slab. After pouring, the formwork system is removed, and then the side beam ear plates are cut off. Finally, the beam body after the side beam ear plates have been removed is painted. Conventional construction methods often suffer from high construction costs, low efficiency, repetitive painting of steel beams, and high safety risks. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a simple and convenient construction method for the concrete pavement layer of steel-concrete composite box girder without top slab, which is reusable and does not require repeated painting. This saves construction costs, improves work efficiency through prefabricated construction, and does not require damage to the already painted beam.

[0004] The purpose of this utility model is achieved through the following technical solution: This formwork support device for the concrete pavement layer of a steel-concrete composite box girder without a top slab includes a steel beam. Several pairs of mounting holes are opened on both sides of the top slab of the steel beam. Each pair of mounting holes is arranged sequentially along the length of the steel beam. A threaded steel tie rod is installed and fixed in each mounting hole. A support main beam is installed on each pair of threaded steel tie rods. The support main beam is located above the top slab. One side of the support main beam extends to the side of the web of the steel beam. Two threaded steel tie rods are installed on the support main beam, and a bottom formwork assembly is installed on the two threaded steel tie rods. The bottom formwork assembly is located on the side of the web of the steel beam.

[0005] The beneficial effects of this utility model are as follows: Compared with the prior art, by installing threaded steel tie rods on both sides of the top plate of the steel beam, installing the main support beam, and installing the bottom formwork assembly in cooperation with the main support beam and the threaded steel tie rods, the construction is simple and convenient, reusable, reduces the construction period, saves construction costs, reduces the risk of high-altitude operations, and reduces environmental pollution from repeated painting.

[0006] Preferably, the bottom formwork assembly includes a bottom formwork main beam, a bottom template, and side templates. The bottom formwork main beam is hoisted and fixed by two threaded steel tie rods, and one side of the bottom formwork main beam is limited to the area below the web of the side beam of the steel beam. The bottom template is fixed on the bottom formwork main beam, and one side of the bottom template is limited to the area below the web of the side beam of the steel beam. The side templates are fixed on the outermost threaded steel tie rod and abut against the bottom template. With the above structure, the bottom formwork assembly is installed on one side of the support main beam in a prefabricated manner, which can pour the concrete bridge deck pavement layer of the steel-concrete composite box girder at both the top and bottom slab sections at one time. After the bridge deck pavement layer reaches the design strength, the bottom formwork assembly of the concrete bridge deck pavement layer at the bottom slab section of the steel-concrete composite box girder can be removed. The construction is simple and convenient, and it can be reused, reducing environmental pollution from repeated painting.

[0007] Preferably, both the bottom formwork and the side formwork are arranged along the length of the steel beam. The threaded steel tie rod passes through the bottom formwork, and the bottom formwork rests on the main beam of the bottom formwork. The threaded steel tie rod near the web of the side beam is fitted with a sleeve. With the above structure, the bottom formwork and side formwork can be set according to the length of the steel beam, making construction simple and convenient. The sleeve makes it easier to remove the threaded steel tie rod from the concrete after pouring.

[0008] Preferably, both the main beam of the support and the main beam of the bottom formwork are composed of two channel steels. The webs of the two channel steels are distributed opposite to each other and have gaps for the threaded steel tie rods to pass through. Connecting blocks are welded to the upper and lower end faces of the two channel steels to fix them together. With the above structure, it is not only easier to manufacture and lower in cost, but also stronger, easier to disassemble and assemble, and has the advantage of being reusable.

[0009] Preferably, the threaded steel tie rod is equipped with four nuts, which are symmetrically distributed in pairs. Two of the nuts abut against and are tightened to the top plate, and the other two nuts abut against and are tightened to the main beam of the support or the main beam of the bottom formwork. With the above structure, not only can the elevation and level of the main beam of the support and the main beam of the bottom formwork be adjusted by means of the nuts, but it also has the advantage of convenient assembly and disassembly.

[0010] Preferably, the threaded steel tie rod installed on the top plate is fitted with a sleeve, and the sleeve abuts against the top plate; after the pouring is completed, subsequent disassembly and assembly make it easier to remove the threaded steel tie rod from the concrete. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the formwork support device of this utility model. Figure 1 .

[0012] Figure 2 This is a schematic diagram of the formwork support device of this utility model. Figure 2 .

[0013] Figure 3 This is a schematic diagram of the formwork support device of this utility model. Figure 3 .

[0014] Figure 4 This is a schematic diagram of the actual application structure of the formwork support device of this utility model.

[0015] Figure 5 This is a schematic diagram of the main beam of the support frame and the main beam of the bottom formwork of this utility model.

[0016] The labels in the attached diagram are as follows: 1. Steel beam; 2. Threaded steel tie rod; 3. Main beam of the support frame; 4. Bottom formwork assembly; 5. Sleeve; 6. Channel steel; 7. Connecting block; 8. Bridge deck pavement layer; 11. Top plate; 12. Mounting hole; 13. Side beam web; 21. Nut; 41. Main beam of bottom formwork; 42. Bottom formwork; 43. Side formwork. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings: as shown in the drawings Figures 1 to 5 As shown, this utility model includes a steel beam 1. Several pairs of mounting holes 12 are provided on both sides of the top plate 11 of the steel beam 1. Each pair of mounting holes 12 is arranged sequentially along the length direction of the steel beam 1. A threaded steel tie rod 2 is installed and fixed in each mounting hole 12. A support main beam 3 is installed on each pair of threaded steel tie rods 2. The support main beam 3 is located above the top plate 11. One side of the support main beam 3 extends to the outside of the side beam web 13 of the steel beam 1. Two threaded steel tie rods 2 are installed on the support main beam 3, and a bottom mold assembly 4 is installed on the two threaded steel tie rods 2. The bottom mold assembly 4 is located on the side beam web 13 of the steel beam 1.

[0018] The bottom formwork assembly 4 includes a main bottom formwork beam 41, a bottom formwork 42, and side formwork 43. The main bottom formwork beam 41 is hoisted and fixed by two threaded steel tie rods 2, and one side of the main bottom formwork beam 41 is positioned below the web 13 of the side beam of the steel beam 1. The bottom formwork 42 is fixed to the main bottom formwork beam 41, and one side of the bottom formwork 42 is positioned below the web 13 of the side beam of the steel beam 1. The side formwork 43 is fixed to the outermost threaded steel tie rod 2 and abuts against the bottom formwork 42. Both the bottom formwork 42 and the side formwork 43 are made of 15mm thick bamboo plywood, and the diameter of the threaded steel tie rod 2 is 16mm.

[0019] Both the bottom formwork 42 and the side formwork 43 are set along the length of the steel beam 1. The threaded steel tie rod 2 passes through the bottom formwork 42, and the bottom formwork 42 rests on the bottom formwork main beam 41. The threaded steel tie rod 2 near the web plate 13 of the side beam is fitted with a sleeve 5. The sleeve 5 mentioned above must be fitted onto the threaded steel tie rod 2 before the threaded steel tie rod 2 is installed with the support main beam 3 and the bottom formwork main beam 41, and the length of the sleeve 5 is greater than the thickness of the concrete pouring.

[0020] Both the main support beam 3 and the bottom formwork main beam 41 are composed of two channel steels 6. The webs of the two channel steels 6 are distributed opposite each other and have gaps for the threaded steel tie rods 2 to pass through. Connecting blocks 7 are welded to the upper and lower end faces of the two channel steels 6 to fix them together. The channel steels 6 are No. 10 channel steels, and the length of the channel steel used in the main support beam 3 is greater than the length of the channel steel used in the bottom formwork main beam 41.

[0021] Four nuts 21 are installed on the threaded steel tie rod 2, symmetrically distributed in pairs. Two nuts 21 abut against and are tightened to fix the top plate 11, while the other two nuts 21 abut against and are tightened to fix the main beam 3 of the support or the main beam 41 of the bottom formwork. The cross-section of the nut 21 is T-shaped, with the bottom of the larger end abutting against and tightening to fix the top plate 11, the main beam 3 of the support, or the main beam 41 of the bottom formwork.

[0022] The threaded steel tie rod 2 installed on the top plate 11 is fitted with a sleeve 5, and the sleeve 5 abuts against the top plate 11. The sleeve 5 mentioned above must be fitted onto the threaded steel tie rod 2 before the threaded steel tie rod 2 is installed with the main beam 3 of the support and the top plate 11, and the length of the sleeve 5 is greater than the thickness of the concrete pouring.

[0023] The usage process of this utility model is as follows: process the formwork support material in the back-end → drill 16mm threaded steel tie rod holes at the top plate 11 inside the steel beam 1 → install 16mm threaded steel tie rod 2 at the top plate 11 where there is a top plate → install the main beam 3 of the support → adjust the elevation and fix the nut 21 → install 16mm threaded steel tie rod 2 at the part without a top plate → install the bottom template 42 at the bottom of the support where there is no top plate → adjust the elevation and fix the nut 21 → install the side template 43 → pour the bridge deck pavement layer 8 → remove the formwork support device after the design strength is reached.

[0024] 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 support device for concrete bridge deck pavement layer without roof in steel-concrete composite box girder, comprising a steel beam (1), characterized in that: Several pairs of mounting holes (12) are provided on both sides of the top plate (11) of the steel beam (1). Each pair of mounting holes (12) is arranged sequentially along the length of the steel beam (1). Each mounting hole (12) is equipped with a threaded steel tie rod (2) and fixed. Each pair of threaded steel tie rods (2) is equipped with a support main beam (3). The support main beam (3) is located above the top plate (11). One side of the support main beam (3) extends to the side of the side beam web (13) of the steel beam (1). Two threaded steel tie rods (2) are installed on the support main beam (3). A bottom formwork assembly (4) is installed on the two threaded steel tie rods (2). The bottom formwork assembly (4) is located on the side of the side beam web (13) of the steel beam (1).

2. The formwork support frame device for concrete bridge deck pavement layer without roof slab of steel-concrete composite box girder according to claim 1, characterized in that: The bottom formwork assembly (4) includes a bottom formwork main beam (41), a bottom formwork (42), and a side formwork (43). The bottom formwork main beam (41) is hoisted and fixed by two threaded steel tie rods (2), and one side of the bottom formwork main beam (41) is limited to the lower part of the side beam web (13) of the steel beam (1). The bottom formwork (42) is fixed on the bottom formwork main beam (41), and one side of the bottom formwork (42) is limited to the lower part of the side beam web (13) of the steel beam (1). The side formwork (43) is fixed on the outermost threaded steel tie rod (2) and abuts against the bottom formwork (42).

3. The formwork support frame device for concrete deck pavement layer without roof slab of steel-concrete composite box girder bridge according to claim 2, characterized in that: The bottom template (42) and the side template (43) are both set along the length of the steel beam (1). The threaded steel tie rod (2) passes through the bottom template (42). The bottom template (42) rests on the bottom formwork main beam (41), and the threaded steel tie rod (2) near the side beam web (13) is fitted with a sleeve (5).

4. The formwork support frame device for concrete deck pavement layer without roof slab of steel-concrete composite box girder bridge according to claim 2, characterized in that: The main beam (3) of the support and the main beam (41) of the bottom formwork are both composed of two channel steels (6). The webs of the two channel steels (6) are distributed in opposite directions and have gaps for the threaded steel tie rods (2) to pass through. Connecting blocks (7) are welded to the upper and lower end faces of the two channel steels (6) to fix the two channel steels (6) together.

5. The formwork support system for concrete deck pavement without roof slab of steel-concrete composite box girder bridge according to claim 2, characterized in that: Four nuts (21) are installed on the threaded steel tie rod (2) and are symmetrically distributed in pairs. Two of the nuts (21) abut against the top plate (11) and are tightened and fixed, while the other two nuts (21) abut against the main beam of the support (3) or the main beam of the bottom formwork (41) and are tightened and fixed.

6. The formwork support system for concrete deck pavement of steel-concrete composite box girder without roof slab according to claim 1, characterized in that: The threaded steel tie rod (2) installed on the top plate (11) is fitted with a sleeve (5), and the sleeve (5) abuts against the top plate (11).

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