Steel box girder support structure and construction method

Abstract

The application discloses a steel box girder supporting structure and a construction method, which comprises a base, a plurality of column bodies installed on the base, an assembling part arranged at the top of the column body and used for assembling the steel box girder, and a detachable operation platform arranged on the column body. The operation platform comprises a first platform, a second platform and a connecting part used for connecting the first platform and the second platform. The connecting part comprises a main body and a bolt. The main body is axially provided with a connecting hole, and the bolt is pre-installed in the connecting hole through thread cooperation. The main body is provided with a plurality of barbs at the other end of the bolt. The first platform and the second platform are both provided with an assembling hole at the corresponding position. The barbs can also pass through the assembling hole on the second platform and form a clamping connection with the second platform. The bolt is installed and fastened with the first platform and the second platform through nut cooperation. The barbs are extruded between the nut and the surface of the second platform to form a gasket. The application can facilitate the installation of the operation platform, the turnover and cost saving.

Description

Technical Field

[0001] This invention relates to building construction, specifically to steel box girder support structures and construction methods. Background Technology

[0002] When constructing bridges across major urban roads, using reinforced concrete structures not only results in slow construction speeds but also significantly impacts traffic. Steel box girder construction technology offers clear advantages in urban road bridge construction, including shorter construction periods and reduced disruption to traffic. Steel box girder construction is a common structural form in bridge construction. However, it requires substantial investment in construction technology, demands highly skilled personnel, and presents significant management challenges. Furthermore, there is considerable room for improvement in the structural optimization design of steel box girders and in the development of optimal design approaches.

[0003] The assembly of steel box girders involves not only their own assembly but also their connection with the supporting columns. The supporting structure involves positioning, tightening, and fixing. Therefore, manual construction at the corresponding locations is also required. This necessitates that the supporting structure not only provides support but also serves as a reusable temporary working platform. Currently, there is no suitable technology to facilitate the assembly and disassembly of this working platform. Furthermore, for ease of relocation, the working platform needs to be assembled and installed at the construction site, thus requiring the platform to be easily assembled as well. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a steel box girder support structure and construction method, which can facilitate the disassembly and assembly of the operating platform, facilitate turnover and save costs.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A steel box girder support structure includes a base, several columns mounted on the base, and an assembly for assembling the steel box girder on the top of each column. A detachable operating platform is provided on each column, comprising a first platform, a second platform, and a connector for connecting the first and second platforms. The connector includes a main body and bolts. The main body has axially arranged connecting holes, and the bolts are pre-installed in the connecting holes via threaded engagement. Several barbs are provided at the other end of the main body corresponding to the bolts. Assembly holes are provided at corresponding positions on the first and second platforms. The barbs on the main body pass through the assembly holes of the first platform, allowing the main body to be pre-installed with the first platform. The barbs can also pass through the assembly holes of the second platform and engage with the second platform to prevent the main body from detaching. The bolts are fastened to the first and second platforms via nuts. When the nuts and bolts are in place, the barbs press between the surfaces of the nuts and the second platform, forming washers.

[0006] As a further improvement of the present invention, the body and the barb are made of metal, and the barb and the body are elastic to allow the barb to deform and pass through the assembly hole; when the nut and bolt are installed in place, the barb unfolds outward and provides elastic force to the nut.

[0007] As a further improvement of the present invention, the number of barbs is multiple and they are evenly distributed circumferentially at the ends of the main body.

[0008] As a further improvement of the present invention, the end of the connecting hole near the barb is provided with a thread, and the end of the nut near the bolt is provided with a smooth surface, and the bolt is threadedly connected to the thread in the connecting hole.

[0009] As a further improvement of the present invention, the nut is provided with anti-slip texture on one end face corresponding to the barb, and the anti-slip texture is arranged radially from the center of the nut.

[0010] As a further improvement of the present invention, when the nut and bolt are installed in place, one end of the main body corresponding to the bolt does not extend beyond the assembly hole of the first platform.

[0011] As a further improvement of the present invention, a buckle is provided on one side of the first platform corresponding to the second platform, and a hook corresponding to the buckle is provided on the second platform; when the first platform and the second platform are assembled, the hook hooks onto the buckle.

[0012] As a further improvement of the present invention, both the first platform and the second platform are provided with fences, and the fences on the first platform and the fences on the second platform are connected by connectors.

[0013] A construction method for a steel box girder support structure includes the following steps.

[0014] Step 1. Construct the base and columns;

[0015] Step 2. Construct the operating platform on the steel box girder support structure as described above on the column;

[0016] Step 3. Perform the operation on the operating platform, install the fittings on the top of the column, and assemble the fittings with the steel box girder.

[0017] The beneficial effects of the present invention

[0018] 1. The pre-installation of the connectors and the first platform allows for direct installation during the preparation process, shortening the construction period and reducing the burden on workers when assembling the first and second platforms by eliminating the need to carry a large number of bolts.

[0019] 2. By tightening the nut and bolt, the barb is squeezed. At this time, the barb can form a washer, providing a certain buffering effect. At the same time, the hook of the barb also has a certain elasticity, which makes it more resistant to loosening.

[0020] 3. The bolt itself is threaded to the main body, and the barb can hook onto the second platform, thus indirectly forming a pre-installation, and the installation effect is stable.

[0021] 4. The nut and bolt are threaded together and rest against the barb, creating a two-threaded engagement that abuts against each other, increasing the difficulty of loosening. 5. The disassembled main body can be recycled and reused, and disassembly is convenient. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the assembly state structure of the present invention;

[0023] Figure 2 This is a three-dimensional structural diagram of the assembly state of the present invention;

[0024] Figure 3 This is a three-dimensional structural diagram of the operating platform of the present invention;

[0025] Figure 4 This is a schematic diagram of the main structure of the operating platform of the present invention;

[0026] Figure 5 This is a schematic diagram of the connector structure of the present invention;

[0027] Figure 6 This is a schematic diagram of another structure of the connector of the present invention;

[0028] Figure 7 for Figure 4 Enlarged cross-sectional view of section A. Reference numerals: 1. Base; 2. Column; 3. Steel box girder; 4. Operating platform; 41. First platform; 411. Buckle; 42. Second platform; 421. Hook; 43. Connector; 431. Main body; 432. Bolt; 433. Connecting hole; 434. Barb; 435. Nut; 44. Assembly hole; 5. Fence. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0030] Reference Figure 1-7 As shown,

[0031] A steel box girder support structure includes a base 1, several columns 2 mounted on the base 1, and an assembly for assembling a steel box girder 3 on the top of each column 2. A detachable operating platform 4 is provided on each column 2. The operating platform 4 includes a first platform 41, a second platform 42, and a connector 43 for connecting the first platform 41 and the second platform 42. The connector 43 includes a main body 431 and bolts 432. The main body 431 has axially arranged connecting holes 433, and the bolts 432 are pre-installed in the connecting holes 433 via threaded engagement. Several barbs 4 are provided at the other end of the main body 431 corresponding to the bolts 432. 34. Mounting holes 44 are provided at corresponding positions on the first platform 41 and the second platform 42. The barb 434 on the main body 431 passes through the mounting hole 44 of the first platform 41, so that the main body 431 and the first platform 41 are pre-installed. The barb 434 can also pass through the mounting hole 44 on the second platform 42 and form a snap-fit ​​with the second platform 42 to prevent the main body 431 from coming out. The bolt 432 is installed and fastened to the first platform 41 and the second platform 42 by cooperating with the nut 435. When the nut 435 and the bolt 432 are installed in place, the barb 434 is pressed between the surface of the nut 435 and the second platform 42 to form a washer.

[0032] In this design, the base 1 and the main body 431 constitute the main support structure, which also requires the operation platform 4 for workers to operate. During the assembly of the operation platform 4, the main body 431 is first inserted into the assembly hole 44 on the first platform 41. At this time, the barb 434 passes through the assembly hole 44, allowing for pre-installation. The barb 434 is used to prevent the main body 431 from coming out. Since the bolt 432 is also installed on the main body 431, it can be installed in the connection hole 433 through threaded engagement. This pre-installation allows for direct installation during preparation, shortening the construction period. It also reduces the burden on workers when assembling the first platform 41 and the second platform 42, as they do not need to carry a large number of bolts 432.

[0033] After the first platform 41 and the second platform 42 are brought together, the main body 431 can be directly passed through the assembly hole 44 of the second platform 42 again. At this time, the barb 434 will also pass through the assembly hole 44 and be locked on the second platform 42 to achieve pre-positioning. Since the head of the bolt 432 must be larger than the size of the assembly hole 44, the platforms can be pre-installed by passing each main body 431 through the corresponding assembly hole 44. Finally, the nut 435 is installed, and the barb 434 is squeezed by tightening the nut 435 and the bolt 432. At this time, the barb 434 can form a washer to provide a certain buffering effect. At the same time, the hook of the barb 434 also has a certain elasticity, which makes the anti-loosening effect better.

[0034] Furthermore, bolt 432 is threadedly connected to the main body 431, and barb 434 can hook onto the second platform 42, thus indirectly forming a pre-installation with a stable installation effect. Nut 435 is threadedly connected to bolt 432 and abuts against barb 434, forming two threaded engagements that abut against each other, increasing the difficulty of loosening.

[0035] Therefore, the main body 431 and the barb 434 are made of metal, and the barb 434 and the main body 431 are elastic so that the barb 434 can deform and pass through the mounting hole 44; when the nut 435 and the bolt 432 are installed in place, the barb 434 unfolds outward and provides elastic force to the nut 435.

[0036] The elasticity of the barb 434 allows it to pass easily through the mounting hole 44, and it has higher pre-installed strength. Furthermore, with the installation of the nut 435, the barb 434 can unfold outward to create a washer effect and provide elasticity.

[0037] There are multiple barbs 434, which are evenly distributed circumferentially at the end of the main body 431, specifically four.

[0038] During disassembly, simply remove the bolt 432 from the connecting hole 433, and then remove the end of the main body 431 away from the bolt 432. The disassembled main body 431 can be collected again, and the barb 434 can be re-riveted to restore its shape.

[0039] In addition, to facilitate the connection of bolt 432, the end of the connecting hole 433 near the barb 434 is provided with a thread, and the end of the nut near the bolt 432 is provided with a smooth surface. Bolt 432 is connected to the thread in the connecting hole 433 by thread engagement.

[0040] The smooth surface allows bolts 432 to pass through directly, reducing the travel of the threaded connection and making installation easier and more efficient.

[0041] In addition, the nut 435 can be preferably provided with anti-slip texture on one end face of the nut 435 corresponding to the barb 434, and the anti-slip texture is arranged radially from the center of the nut 435.

[0042] The anti-slip texture can form a better contact with the surface of the hook and increase friction, which can make the nut 435 and the body 431 relatively circumferentially fixed. When the nut 435 and the bolt 432 are connected by threads, the body 431 can be rotated together, and axial movement of the threaded engagement is generated, which also makes the installation efficiency higher. Moreover, there will be gaps between adjacent hooks, which can further increase friction with the radial anti-slip texture.

[0043] In a further optimization, when the nut 435 and bolt 432 are installed in place, the end of the main body 431 corresponding to the bolt 432 does not extend beyond the assembly hole 44 of the first platform 41.

[0044] The main body 431 does not extend beyond the mounting hole 44 of the first platform 41, which reduces obstruction to the head of the bolt 432, allowing the head of the bolt 432 to abut against the surface of the first platform 41. This results in better assembly with the nut 435.

[0045] Furthermore, since the bolt 432 and the body 431 are connected by threads, when the bolt 432 and the body 431 are engaged by threads, the bolt 432 can extend out, and the extended part generates a certain axial space redundancy. This redundancy is used to press the head of the bolt 432 to allow the barb 434 to pass through the assembly hole 44 of the second platform 42. After the pre-installation is completed, when the assembly is performed by the nut 435, the friction between the nut 435 and the barb 434 can rotate the body 431 together. At this time, the body 431 will retract into the assembly hole 44 of the first platform 41, avoiding any impact on the head of the bolt 432.

[0046] In addition, to make the disassembly and assembly between the first platform 41 and the second platform 42 more convenient, a buckle 411 is provided on the side of the first platform 41 corresponding to the second platform 42, and a hook 421 corresponding to the buckle 411 is provided on the second platform 42; when the first platform 41 and the second platform 42 are assembled, the hook 421 hooks the buckle 411.

[0047] The buckle 411 can be a ring, which is not limited to a circle, and can be hooked by the hook 421 for positioning. After the first platform 41 and the second platform 42 are assembled, the hook 421 will not disengage from the buckle 411, and at the same time provide a connecting function.

[0048] In the preferred structure, fences 5 are provided on both the first platform 41 and the second platform 42, and the fences 5 on the first platform 41 and the fences 5 on the second platform 42 are connected by connectors 43.

[0049] The fence 5 enhances safety. The bottoms of the first platform 41 and the second platform 42 are assembled using hooks 421 and clips 411. The fence 5 is connected by connectors 43, which consist of mounting holes 44, a main body 431, bolts 432, barbs 434, and nuts working together. This structure makes connecting the fence 5 easier and increases overall installation efficiency. Furthermore, fewer connectors 43 are used, making assembly and disassembly more convenient.

[0050] Based on the above structure, a construction method for a three-braced steel box girder is also described below, including the following steps.

[0051] Step 1. Construct base 1 and column 2;

[0052] Step 2. Construct the operating platform 4 on the steel box girder 3 support structure as described above on column 2;

[0053] Step 3. Operate on the operating platform 4, install the fittings on the top of the column 2, and assemble it with the steel box girder 3 using the fittings. The above description is merely a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A steel box girder support structure, characterized in that, The system includes a base, several columns mounted on the base, and fittings on the top of the columns for assembly with a steel box girder. Each column has a detachable operating platform, comprising a first platform, a second platform, and a connector for connecting the first and second platforms. The connector includes a main body and bolts. The main body has axially arranged connecting holes, and the bolts are pre-installed in the connecting holes via threaded engagement. Several barbs are provided at the other end of the main body corresponding to the bolts. Assembly holes are provided at corresponding positions on the first and second platforms. The barbs on the main body pass through the assembly holes on the first platform, allowing the main body to be pre-installed with the first platform. The barbs can also pass through the assembly holes on the second platform and engage with the second platform to prevent the main body from detaching. The bolts are fastened to the first and second platforms via nuts. When the nuts and bolts are in place, the barbs press between the surfaces of the nuts and the second platform, forming washers.

2. The steel box girder support structure according to claim 1, characterized in that, The body and the barb are made of metal, and the barb and the body are elastic to allow the barb to deform and pass through the assembly hole; when the nut and bolt are installed in place, the barb unfolds outward and provides elastic force to the nut.

3. The steel box girder support structure according to claim 2, characterized in that, The number of barbs is multiple, and they are evenly distributed circumferentially at the ends of the main body.

4. The steel box girder support structure according to claim 2, characterized in that, The end of the connecting hole near the barb is threaded, while the end near the nut of the bolt is smooth. The bolt is threadedly connected to the thread in the connecting hole.

5. The steel box girder support structure according to claim 2, 3, or 4, characterized in that, The nut has anti-slip patterns on one end face corresponding to the barb, and these anti-slip patterns are arranged radially from the center of the nut.

6. The steel box girder support structure according to claim 5, characterized in that, When the nut and bolt are installed in place, one end of the main body corresponding to the bolt does not extend beyond the assembly hole of the first platform.

7. The steel box girder support structure according to claim 1, characterized in that, The first platform has a buckle on one side corresponding to the second platform, and the second platform has a hook corresponding to the buckle; when the first platform and the second platform are assembled, the hook hooks onto the buckle.

8. The steel box girder support structure according to claim 1, characterized in that, Both the first platform and the second platform are equipped with fences, and the fences on the first platform and the fences on the second platform are connected by connectors.

9. A construction method for a steel box girder support structure, characterized in that, Includes the following steps Step 1. Construct the base and columns; Step 2. Construct an operating platform on the column as described in any one of claims 1 to 8 for the steel box girder support structure; Step 3. Perform the operation on the operating platform, install the fittings on the top of the column, and assemble the fittings with the steel box girder.

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