Segmented large-span steel box girder assembly structure

Abstract

The application discloses a sectional large-span steel box girder assembling structure, which comprises a left steel box girder and a right steel box girder, wherein the left steel box girder and the right steel box girder are fixedly connected through bolts, a lifting ring for penetrating a steel cable is arranged on each of the left steel box girder and the right steel box girder, and a connecting part for fixing a driving part is arranged on the left steel box girder or the right steel box girder; the driving part is matched with the steel cable to be wound to pull the left steel box girder and the right steel box girder to be combined. The application is more convenient to install and reduces installation difficulty.

Description

Technical Field

[0001] This invention relates to building construction, specifically to a segmented large-span steel box girder assembly structure. 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] Currently, steel box girders are quite large, requiring heavy transport equipment for transportation, and their construction is also quite challenging. Therefore, a segmented steel box girder design is needed to facilitate transportation and on-site assembly.

[0004] To address this, the prior art disclosed in utility model patent CN212426680U discloses a solution that divides the steel box girder into four parts, allowing them to be transported separately to distribute the weight and reduce the burden on transport vehicles. Moreover, the assembly can be completed with the aid of lifting equipment, saving time and effort. Pipe holes are opened inside the steel box girder, allowing electrical circuits and pipelines on the bridge to pass through directly without needing to be installed on the outside, thus making full use of the internal space.

[0005] However, this solution requires a crane for assembly, and the installation is difficult and inconvenient when it is being assembled while in a suspended state. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide a segmented large-span steel box girder assembly structure that is easier to install and reduces installation difficulty.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a segmented large-span steel box girder assembly structure, comprising a left steel box girder and a right steel box girder, wherein the left steel box girder and the right steel box girder are fixedly connected by bolts, and both the left steel box girder and the right steel box girder are provided with lifting rings for threading steel cables, and each of the left steel box girder or the right steel box girder is provided with a connecting part for fixing a driving component, wherein the driving component cooperates with the steel cable to rewind, thereby pulling and merging the left steel box girder and the right steel box girder.

[0008] As a further improvement of the present invention, the lifting ring is used to suspend a fixed pulley, which is provided with a barb for cooperating with the lifting ring for suspension.

[0009] As a further improvement of the present invention, the left steel box girder and the right steel box girder are provided with positioning structures so that the two can be aligned and then pulled together by the drive component and the steel cable after positioning.

[0010] The positioning structure includes a first connector and a second connector.

[0011] The first connector is arc-shaped with its concave side facing the ground, and is positioned at the bottom of the left steel box girder corresponding to the position of the right steel box girder. The second connector is shaped to match the concave side, and is positioned at the bottom of the right steel box girder corresponding to the position of the first connector. When the left and right steel box girders are joined, the opposite sides of the left and right steel box girders are raised, and the first and second connectors are joined together. When the driving component works with the steel cable to pull the left and right steel box girders together, the corresponding sides of the left and right steel box girders move downwards and move closer together.

[0012] As a further improvement of the present invention, the bottom edges of the left and right steel box girders are provided with rounded corners.

[0013] As a further improvement of the present invention, a buckle is provided on the left steel box girder and a fastener is provided on the right steel box girder. The buckle and the fastener cooperate to lock the left steel box girder and the right steel box girder.

[0014] As a further improvement of the present invention, a pre-installed connector is provided on the right steel box girder. The pre-installed connector includes a pre-installed component installed in the mounting hole of the right steel box girder and a bolt installed on the pre-installed component. The pre-installed component is engaged with the mounting hole.

[0015] As a further improvement of the present invention, the pre-installation component includes a main body, a plurality of hooks disposed at the end of the main body, and a connecting hole penetrating the axial direction of the main body. The bolt is installed in the connecting hole by threaded connection or interference fit. The plurality of hooks are evenly distributed circumferentially at the end of the main body. When the bolt is connected to the nut, the end of the bolt corresponding to the nut extends out of the main body and the hooks for the nut to connect.

[0016] As a further improvement of the present invention, the end of the hook is provided with a bevel on one side corresponding to the connecting hole, and the opening formed by the surrounding hooks is widened by the bevel. When the nut is installed in place, the hook folds outward and clamps between the nut and the left steel box girder.

[0017] The beneficial effects of this invention are that the left and right steel box girders are joined together by a driving mechanism. First, the bottoms of the left and right steel box girders are aligned. Then, steel cables are passed through the lifting rings of both girders, and the driving mechanism is used to wind them up, pulling the left and right steel box girders together. The driving mechanism maintains the joined state, making it convenient for workers to install the left and right steel box girders. This driven splicing scheme is simple to install, does not require lifting equipment, and is easier to control during operation. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the present invention in its assembled state;

[0019] Figure 2 This is a three-dimensional schematic diagram of the present invention in its assembled state;

[0020] Figure 3 This is a structural diagram illustrating the assembly process of the present invention;

[0021] Figure 4 This is a schematic diagram of the pre-installation component structure of the present invention;

[0022] Figure 5 This is a cross-sectional structural diagram of another embodiment of the pre-installation component of the present invention.

[0023] Reference numerals: 1. Left steel box girder; 11. First connecting piece; 2. Right steel box girder; 21. Second connecting piece; 31. Steel cable; 32. Drive component; 33. Connecting part; 34. Fixed pulley; 4. Lifting ring; 5. Pre-installed connecting piece; 51. Mounting hole; 52. Pre-installed part; 521. Main body; 522. Hook; 523. Connecting hole; 53. Bolt; 6. Nut; 7. Inclined surface. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0025] Reference Figure 1-5 As shown,

[0026] A segmented large-span steel box girder assembly structure includes a left steel box girder 1 and a right steel box girder 2, which are fixedly connected by bolts 53. Both the left steel box girder 1 and the right steel box girder 2 are provided with lifting rings 4 for threading steel cables 31. The left steel box girder 1 or the right steel box girder 2 is provided with a connecting part 33 for fixing a driving component 32. The driving component 32 cooperates with the steel cable 31 to rewind and pull the left steel box girder 1 and the right steel box girder 2 together.

[0027] In this scheme, the left steel box girder 1 and the right steel box girder 2 are merged by a driving component. First, the bottoms of the left steel box girder 1 and the right steel box girder 2 are aligned. Then, the steel cable 31 is passed through the lifting rings 4 of both, and the driving component 32 is used to wind them up, so that the left steel box girder 1 and the right steel box girder 2 are pulled together and merged together. The driving component 32 is used to maintain the merged state, which makes it convenient for workers to install the left steel box girder 1 and the right steel box girder 2.

[0028] In addition, it should be noted that the left steel box girder 1 and the right steel box girder 2 are preferably abutted at their bottom positions. When the drive component 32 is driven, it pulls the left steel box girder 1 and the right steel box girder 2 together by means of steel cable 31 and brings them together by flipping.

[0029] To make the operation of the steel cable 31 more convenient, the lifting ring 4 is used to suspend the fixed pulley 34, which is equipped with a barb for cooperating with the lifting ring 4 for suspension.

[0030] Using a fixed pulley 34 for driving makes the driving action smoother. The fixed pulley 34 is suspended by a hook, making the operation simpler and more convenient.

[0031] In addition, as an implementation method to make the cooperation between the left steel box girder 1 and the right steel box girder 2 more stable, the left steel box girder 1 and the right steel box girder 2 are provided with positioning structures so that the two can be aligned and driven by the drive component 32 and the steel cable 31 to pull them together after positioning.

[0032] The positioning structure includes a first connector 11 and a second connector 21. The first connector 11 is arc-shaped with its concave side facing the ground. The first connector 11 is positioned at the bottom of the left steel box girder 1 corresponding to the position of the right steel box girder 2. The shape of the second connector 21 matches the concave surface. The second connector 21 is positioned at the bottom of the right steel box girder 2 corresponding to the position of the first connector 11. When the left steel box girder 1 and the right steel box girder 2 are connected, the opposite side of the left steel box girder 1 and the right steel box girder 2 are in a raised state, and the first connector 11 and the second connector 21 are connected together. When the driving component 32 cooperates with the steel cable 31 to pull the left steel box girder 1 and the right steel box girder 2 together, the corresponding side of the left steel box girder 1 and the right steel box girder 2 moves downward and moves closer to each other.

[0033] In this design, the positioning structure allows the two components to be in a more stable fit, facilitating their close proximity. Specifically, the first connector 11 and the second connector 21 form an abutting fit, utilizing curved surfaces for better stability and preventing them from disengaging during the flipping and splicing of the left steel box girder 1 and the right steel box girder 2.

[0034] During assembly, the first connecting piece 11 and the second connecting piece 21 of the left steel box girder 1 and the right steel box girder 2 are first spliced ​​together. At this time, the two are in a state of being raised in the middle, as shown in the figure. As the driving component 32 is driven, the left steel box girder 1 and the right steel box girder 2 can be merged. During the merging, the contact position of the first connecting piece 11 and the second connecting piece 21 will move downward until the left steel box girder 1 and the right steel box girder 2 are merged together.

[0035] When the first connecting piece 11 and the second connecting piece 21 move downwards, the left steel box girder 1 and the right steel box girder 2 will move to both sides. To facilitate this movement, rounded corners are provided at the bottom of the left steel box girder 1 and the right steel box girder 2 corresponding to the two side edges. The rounded corners make movement easier. When assembling the left steel box girder 1 and the right steel box girder 2, it is best to assemble them on a steel plate or a smooth ground for easier installation.

[0036] In addition, to further facilitate installation, a buckle is provided on the left steel box girder 1 and a latch is provided on the right steel box girder 2. The buckle and the latch engage to lock the left steel box girder 1 and the right steel box girder 2.

[0037] After the left steel box girder 1 and the right steel box girder 2 are combined, they can be pre-installed using clips and latches, which facilitates the subsequent tightening of the two with bolts 53 and reduces the load on the drive component 32. The drive component 32 can be an electric winch or a manual winch; an electric winch is safer.

[0038] To further facilitate installation, a pre-installed connector 5 is provided on the right steel box girder 2. The pre-installed connector 5 includes a pre-installed part 52 installed in the mounting hole 51 of the right steel box girder 2 and a bolt 53 installed on the pre-installed part 52. The pre-installed part 52 is engaged with the mounting hole 51.

[0039] In this design, the pre-installed connector 5 can be made of plastic. First, the pre-installed connector 52 is connected to the bolt 53. Then, the pre-installed connector 52 is snapped into the mounting hole 51. This method of pre-installing the bolt 53 into the mounting hole 51 allows for faster subsequent installation. This snap-fit ​​method can employ the following structure:

[0040] The pre-installation component 52 includes a main body 521, a plurality of hooks 522 disposed at the end of the main body 521, and a connecting hole 523 penetrating the axial direction of the main body 521. The bolt 53 is installed in the connecting hole 523 by threaded connection or interference fit. The plurality of hooks 522 are evenly distributed circumferentially at the end of the main body 521. When the bolt 53 is connected to the nut 6, the end of the bolt 53 corresponding to the nut 6 extends out of the main body 521 and the hooks 522 for the nut 6 to connect.

[0041] First, the hook 522 is passed through the mounting hole 51. The hook 522 then acts as a latch, preventing the main body 521 from coming off. The bolt 53 is pre-installed in the connecting hole 523, which can be threaded or smooth. The bolt 53's own thread is used for self-tapping, or it can be installed in the connecting hole 523 with an interference fit. The interference fit doesn't need to be very strong, just enough to prevent the bolt 53 from falling off. After the left steel box girder 1 and the right steel box girder 2 are fitted together, the hook 522 is passed through the mounting hole 51 on the left steel box girder 1. The bolt 53 is then rotated so that it extends beyond the end of the main body 521 and beyond the end of the hook 522. A nut 6 is then placed on the end of the bolt 53 for connection. During this connection process, as the nut 6 and bolt tighten, the hook 522 deforms, acting as a washer and providing some shock absorption.

[0042] If the connecting hole 523 in the main body 521 is threaded to the bolt 53, the thread can be set on one side close to the nut 6, while the other side is smooth. This can reduce the axial movement required due to the threaded engagement and allow the bolt 53 to extend out of the main body 521 faster.

[0043] As an alternative (see Figure 5 As shown, the end of the hook 522 is provided with a bevel 7 on one side corresponding to the connecting hole 523. The opening formed by several hooks 522 is widened by the bevel 7. When the nut 6 is installed in place, the hook 522 folds outward and clamps between the nut 6 and the left steel box girder 1.

[0044] In this design, when the nut 6 is tightened in conjunction with the bolt 53, the nut 6 will push the hook 522 outward, causing it to expand outward until the nut 6 and the bolt 53 are properly engaged. At this point, the bent position of the hook 522 will act as a washer. This bending is more stable than directly using the hook 522 as a washer, and can prevent the hook 522 from coming off outward, which would cause the washer to fail or weaken.

[0045] The above description is merely a preferred embodiment of the present invention. 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 principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A segmented large-span steel box girder assembly structure, comprising a left steel box girder and a right steel box girder, wherein the left steel box girder and the right steel box girder are fixedly connected by bolts, characterized in that, Both the left and right steel box girders are equipped with lifting rings for threading steel cables. Each of the left and right steel box girders is equipped with a connecting part for fixing the driving component. The driving component works with the steel cable to wind up the cable, thereby pulling and merging the left and right steel box girders. The lifting ring is used to suspend a fixed pulley, which is provided with barbs for cooperating with the lifting ring for suspension; The left and right steel box girders are equipped with positioning structures so that they can be aligned and then pulled together by the drive components and steel cables after being positioned. The positioning structure includes a first connector and a second connector. The first connector is arc-shaped with its concave side facing the ground, and is positioned at the bottom of the left steel box girder corresponding to the position of the right steel box girder. The second connector is shaped to match the concave side, and is positioned at the bottom of the right steel box girder corresponding to the position of the first connector. When the left and right steel box girders are joined, the opposite sides of the left and right steel box girders are raised, and the first and second connectors are joined together. When the driving component works with the steel cable to pull the left and right steel box girders together, the corresponding sides of the left and right steel box girders move downwards and move closer together. The bottom edges of the left and right steel box girders are rounded. The left steel box girder is provided with a buckle, and the right steel box girder is provided with a fastener. The buckle and the fastener cooperate to lock the left steel box girder and the right steel box girder. The right steel box girder is provided with a pre-installed connector, which includes a pre-installed component installed in the mounting hole of the right steel box girder and a bolt installed on the pre-installed component. The pre-installed component is engaged with the mounting hole.

2. The segmented large-span steel box girder assembly structure according to claim 1, characterized in that, The pre-installed component includes a main body, several hooks disposed at the end of the main body, and a connecting hole penetrating the axial direction of the main body. The bolt is installed in the connecting hole by threaded connection or interference fit. The several hooks are evenly distributed circumferentially at the end of the main body. When the bolt is connected to the nut, the end of the bolt corresponding to the nut extends out of the main body and the hooks for the nut to connect.

3. The segmented large-span steel box girder assembly structure according to claim 2, characterized in that, The end of the hook has a bevel on one side corresponding to the connecting hole. The opening formed by several hooks is widened by the bevel. When the nut is installed in place, the hook folds outward and clamps between the nut and the left steel box girder.

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