A kind of assembling jig for hybrid solid member variable cross-section truss girder

Abstract

The utility model relates to a kind of for mixed solid web component variable cross-section truss girder on the assembling jig, including chassis and support frame;The support frame is fixed on the chassis and is provided with four, and it is equidistantly arranged along the length direction of the chassis in sequence, wherein the center of two support frames is equipped with rest bar, and two rest bars are distributed along the length direction of the chassis in inclined shape;Reinforcing frame is equipped between adjacent support frames;The utility model is set by the above support frame, and rest bar is set between two support frames, can realize the high bearing capacity variable cross-section truss girder of mixed solid web component installation and disassembly, avoid installation precision out of tolerance and safety accident in installation process;With the advantages of convenient processing, light weight, flexible on-site adjustment and good use effect.

Description

Technical Field

[0001] This utility model belongs to the field of engineering construction technology, and in particular relates to an assembly jig for a mixed solid web variable cross-section truss beam. Background Technology

[0002] When constructing a new bridge above the projection surface of an old bridge, the underlying structure of the old bridge often needs to be preserved intact during construction. In this case, the cap beam structure often adopts a three-column structure with a single pile and a single column (one pier on each side of the median strip and edge line of the two bridge spans). When the old bridge is wide, the span of the new bridge cap beam increases accordingly to meet the crossing requirements. When using a three-column prestressed concrete cap beam with a single pile and a single column, considering the heavy self-weight of the cap beam structure and the weak load-bearing capacity of the old bridge, the temporary load-bearing formwork cannot be supported on the old bridge during construction. Therefore, the temporary load-bearing formwork needs to span the old bridge laterally, which places high demands on the strength, stiffness, and stability of the support. Using conventional 321, HD200, and XT300 type prefabricated Bailey beams or large-size steel structures, the strength, stiffness, and stability of the load-bearing support often do not meet the requirements of current specifications.

[0003] Currently, the commonly used prefabricated truss beams are mainly the 321 type and HD200 type Bailey beams, with a maximum segment length of 3.048m. Bailey beams can be safely installed and dismantled on the ground without relying on a formwork. Our company has independently developed a "high-load-bearing capacity variable cross-section truss beam with hybrid solid web members" (hereinafter referred to as: truss beam) suitable for ultra-large spans and high load-bearing capacity. The maximum segment length is about 15m and the maximum structural height is 3.65m. At present, there is no related equipment or device that can meet the installation and dismantling requirements of the truss beam. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an assembly jig for mixed solid web variable cross-section truss beams, which solves the problem of installation and disassembly of high load-bearing capacity variable cross-section truss beams with mixed solid web components, and avoids installation accuracy deviations and safety accidents during the installation and disassembly process.

[0005] The purpose of this utility model is achieved through the following technical solution: the assembly jig for a mixed solid web variable cross-section truss beam includes a base frame and a support frame; the support frame is fixed on the base frame and four of them are arranged at equal intervals along the length of the base frame, wherein a support strip is provided at the center of two of the support frames, and the two support strips are distributed obliquely along the length of the base frame; a reinforcing frame is provided between adjacent support frames.

[0006] The beneficial effects of this utility model are as follows: Compared with the prior art, by setting up the above-mentioned support frame and setting a resting strip between two of the support frames, it is possible to install and dismantle the high-load-bearing variable cross-section truss beam with mixed solid web components, avoiding installation accuracy deviation and safety accidents during the installation and dismantling process; it has the advantages of convenient processing, light weight, flexible on-site adjustment and good use effect.

[0007] Preferably, the base frame includes bottom crossbars and bottom longitudinal bars. Three bottom crossbars are provided and evenly spaced along the width of the base frame. Four bottom longitudinal bars are provided and fixed to the three bottom crossbars. The four bottom longitudinal bars are arranged and fixed at equal intervals along the length of the bottom crossbars. Diagonal bottom bars are fixed between adjacent bottom longitudinal bars, and these diagonal bottom bars are arranged in a wavy pattern. This structural design makes the assembly and fixing of the base frame more convenient. The materials used are all readily available in the market, making procurement, processing, and cost-effective. Furthermore, the diagonal bottom bars enhance the structural stability.

[0008] Preferably, the support frame includes two vertical rods and two diagonal braces. The two vertical rods are fixed to the bottom longitudinal rod, and one end of each of the two diagonal braces is fixed to the outer side of the vertical rod, and the other end is fixed to both ends of the bottom longitudinal rod. With the above structure, the two vertical rods can effectively limit the truss beam, and the two diagonal braces make the longitudinal support force of the vertical rods more stable.

[0009] Preferably, the two vertical rods are fixed at the center of the bottom longitudinal rod, and the distance between the two vertical rods is greater than the width of the truss beam. With the above structure, the stress point of the truss beam is always at the center of the base frame during the installation and dismantling process, resulting in better stability.

[0010] Preferably, the reinforcing frame includes reinforcing diagonal braces and reinforcing horizontal braces. Each vertical bar corresponds to one reinforcing diagonal brace. One end of the reinforcing diagonal brace is fixed to the outer side of the vertical bar, and the other end is fixed to the bottom horizontal brace. The reinforcing horizontal brace is fixed between adjacent vertical bars and is located above the reinforcing diagonal brace. Through the above structure, the lateral support force between the support frames is more stable, which greatly improves the stability and safety of the truss beam during installation and dismantling.

[0011] Preferably, the inclination rate between the two support strips is consistent with the inclination rate at the bottom of the truss beam; since one side of the bottom of the truss beam is inclined according to the design requirements of the high load-bearing capacity variable cross-section truss beam, the above-mentioned structure makes the stability of installation and dismantling better. Attached Figure Description

[0012] Figure 1This is a schematic diagram of the main structure of the assembly frame of this utility model.

[0013] Figure 2 This is a side view schematic diagram of the assembly frame structure of this utility model.

[0014] Figure 3 This is a top view schematic diagram of the assembly frame of this utility model.

[0015] Figure 4 This is a schematic diagram of the actual application structure of the assembly frame of this utility model.

[0016] The labels in the attached diagram are as follows: 1. Base frame; 2. Support frame; 3. Support strip; 4. Reinforcing frame; 5. Truss beam; 11. Bottom horizontal bar; 12. Bottom longitudinal bar; 13. Bottom diagonal bar; 21. Vertical bar; 22. Diagonal brace; 41. Reinforcing diagonal bar; 42. Reinforcing horizontal bar. 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 4 As shown, this utility model includes a base frame 1 and support frames 2; four support frames 2 are fixed on the base frame 1 and are arranged at equal intervals along the length of the base frame 1. A support strip 3 is provided at the center of two support frames 2, and the two support strips 3 are distributed obliquely along the length of the base frame 1; a reinforcing frame 4 is provided between adjacent support frames 2. It is easy to process and lightweight: the structure uses common bulk materials available on the market, making procurement easy, and the processing technology is mature and convenient. It has high overall rigidity and allows for flexible on-site adjustments. It performs well in use: practical installation shows that it can quickly align the truss beam axis, and the installation process is safe and reliable.

[0018] The base frame 1 includes bottom horizontal bars 11 and bottom vertical bars 12. There are three bottom horizontal bars 11 and they are evenly distributed along the width direction of the base frame 1. There are four bottom vertical bars 12 and they are fixed on the three bottom horizontal bars 11. The four bottom vertical bars 12 are arranged and fixed at equal intervals along the length direction of the bottom horizontal bars 11. Bottom diagonal bars 13 are fixed between adjacent bottom vertical bars 12 and the bottom diagonal bars 13 are distributed in a wave-like pattern.

[0019] The support frame 2 includes two vertical rods 21 and two diagonal braces 22. The two vertical rods 21 are fixed to the bottom longitudinal rod 12, and one end of each of the two diagonal braces 22 is fixed to the outside of the vertical rods 21, and the other end is fixed to both ends of the bottom longitudinal rod 12.

[0020] Two vertical rods 21 are fixed at the center of the bottom longitudinal rod 12, and the distance between the two vertical rods 21 is greater than the width of the truss beam 5.

[0021] The reinforcing frame 4 includes reinforcing diagonal bars 41 and reinforcing horizontal bars 42. Each vertical bar 21 has a corresponding reinforcing diagonal bar 41. One end of the reinforcing diagonal bar 41 is fixed to the outside of the vertical bar 21, and the other end of the reinforcing diagonal bar 41 is fixed to the bottom horizontal bar 11. The reinforcing horizontal bar 42 is fixed between adjacent vertical bars 21, and the reinforcing horizontal bar 42 is located above the reinforcing diagonal bar 41.

[0022] The inclination rate between the two support bars 3 is consistent with the inclination rate at the bottom of the truss beam 5.

[0023] All the above-mentioned rods are fixedly connected by welding, and each rod is made of I10a# steel. After the dimensions of each rod are accurately laid out, they are cut by laser and the cut surfaces are ground flat. The interface of the rod connection is made of single-sided fillet weld with a weld leg size hf≥4mm.

[0024] The forming method of this utility model is as follows: According to the design dimensions and bottom slope of the truss beam 5, firstly, the dimensions of each rod are cut; then, the base frame 1 is made first, and then each support frame 2 is made; finally, each support frame 2 is welded and fixed to the base frame 1, and the reinforcing frame 4 and the support strip 3 are welded on. Its usage method is as follows: Place the formed assembly frame on the ground, and the truss beam 5 is placed on the support frame 2 and the support strip 3 to achieve positioning.

[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. An assembly jig for a mixed solid-web variable cross-section truss beam, comprising a base frame (1) and a support frame (2); characterized in that: The support frame (2) is fixed on the base frame (1) and four of them are arranged at equal intervals along the length of the base frame (1). A support strip (3) is provided at the center of two of the support frames (2), and the two support strips (3) are distributed at an incline along the length of the base frame (1). A reinforcing frame (4) is provided between adjacent support frames (2).

2. The assembly jig for a mixed solid-web variable cross-section truss beam according to claim 1, characterized in that: The base frame (1) includes bottom horizontal bars (11) and bottom vertical bars (12). There are three bottom horizontal bars (11) and they are evenly distributed along the width direction of the base frame (1). There are four bottom vertical bars (12) and they are fixed on the three bottom horizontal bars (11). The four bottom vertical bars (12) are arranged and fixed at equal intervals along the length direction of the bottom horizontal bars (11). There are bottom diagonal bars (13) fixed between adjacent bottom vertical bars (12). The bottom diagonal bars (13) are distributed in a wave-like pattern.

3. The assembly jig for a mixed solid-web variable cross-section truss beam according to claim 2, characterized in that: The support frame (2) includes two vertical rods (21) and two diagonal braces (22). The two vertical rods (21) are fixed on the bottom longitudinal rod (12). One end of the two diagonal braces (22) is fixed on the outside of the vertical rods (21), and the other end is fixed on both ends of the bottom longitudinal rod (12).

4. The assembly jig for a mixed solid-web variable cross-section truss beam according to claim 3, characterized in that: The two vertical bars (21) are fixed at the center of the bottom longitudinal bar (12), and the distance between the two vertical bars (21) is greater than the width of the truss beam (5).

5. The assembly jig for a mixed solid-web variable cross-section truss beam according to claim 3, characterized in that: The reinforcing frame (4) includes reinforcing diagonal bars (41) and reinforcing horizontal bars (42). Each vertical bar (21) has a corresponding reinforcing diagonal bar (41). One end of the reinforcing diagonal bar (41) is fixed to the outside of the vertical bar (21), and the other end of the reinforcing diagonal bar (41) is fixed to the bottom horizontal bar (11). The reinforcing horizontal bar (42) is fixed between adjacent vertical bars (21), and the reinforcing horizontal bar (42) is located above the reinforcing diagonal bar (41).

6. The assembly jig for a mixed solid-web variable cross-section truss beam according to claim 1, characterized in that: The inclination between the two support bars (3) is consistent with the inclination at the bottom of the truss beam (5).

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