Bailey truss structure

Abstract

The utility model discloses a bailey truss structure, belongs to the technical field of building workpieces, and aims to solve the problems that the supporting strength of the whole bailey truss is reduced and the use flexibility and stability of the bailey truss are reduced due to insufficient structural strength at non-node and weak node positions. Comprising an upper chord member, a lower chord member, a supporting frame, an inclined supporting rod, a supporting structure, a rotating shaft and a positioning structure, the lower chord member is fixedly connected to the lower portion of the upper chord member through the supporting frame, the inclined supporting rod is fixedly connected between the supporting frame and the upper chord member and between the supporting frame and the lower chord member, and mounting holes are formed in the upper chord member and the lower chord member respectively. The supporting structures are arranged on the front side and the rear side of the inclined supporting rod in a staggered mode, and the positioning structures are arranged in the upper chord member and the lower chord member respectively. According to the supporting structure, the structural strength of the bailey truss at the non-node position and the weak node position can be effectively enhanced, stress concentration at the positions is reduced, and the overall bearing capacity is improved.

Description

Technical Field

[0001] This utility model belongs to the field of building components technology, specifically relating to a Bailey bridge structure. Background Technology

[0002] Bailey bridges, also known as "prefabricated highway steel bridges," were originally called the "321" highway steel bridge. They were China's strategic highway steel bridges. Bailey bridges are steel frames that form specific units, which can be assembled into many components and equipment.

[0003] The existing patent publication number CN205857006 U describes a novel Bailey bridge with a locking device comprising a locking hook, a base plate, side plates, a connecting block, and bolts. The base plate is fixedly connected to the upper crossbeam and has an opening through which the threaded end of the bolt can pass, but the bolt head cannot pass through the opening. The bolt is threadedly connected to the connecting block through the opening. The locking hook is located at both ends of the connecting block and is rotatably mounted to the connecting block. Side plates are located at both ends of the bolt and are fixedly mounted relative to the Bailey bridge body. However, in practical use, the following shortcomings still exist: From a practical perspective, in the field of building construction, it is well known that Bailey bridges are used in cast-in-place bridges... While Bailey bridges are widely used in beam structures, construction accidents involving failure at their supports are common. Once a Bailey bridge is damaged at a support, the entire structure becomes unusable, rendering it completely useless for bridge applications. Therefore, failure at a support can have serious consequences. In actual use, supports often occur at weak or non-weak nodes. In the aforementioned structures, the structural strength at non-weak and non-weak nodes is insufficient, resulting in a reduction in the overall support strength of the Bailey bridge and decreasing its flexibility and stability.

[0004] Therefore, a Bailey bridge structure is needed to solve the problem of insufficient structural strength at non-node and weak node locations in the existing technology, which reduces the overall support strength of the Bailey bridge and reduces its flexibility and stability. Utility Model Content

[0005] The purpose of this invention is to provide a Bailey bridge structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a Bailey bridge structure, comprising an upper chord, a lower chord, a support frame, diagonal braces, a support structure, a rotating shaft, and a positioning structure. The lower chord is fixedly connected to the lower part of the upper chord via the support frame. The diagonal braces are fixedly connected between the support frame and the upper and lower chords. The upper and lower chords are respectively provided with mounting holes. The support structure is staggered on the front and rear sides of the diagonal braces. The positioning structures are respectively disposed inside the upper and lower chords.

[0007] It should be noted in the solution that the support structure consists of a central fixed rod, a telescopic rod, a limiting plate, an end fixed rod, a threaded rod, a connecting seat, and a mounting block. The telescopic rod is symmetrically fixed to the upper and lower sides of the central fixed rod. The limiting plate is fixedly connected to one end of the telescopic rod. The end fixed rod has a storage groove inside, and the telescopic rod slides inside the storage groove through the limiting plate. A threaded rod is threaded to the front side of one end of the end fixed rod.

[0008] It is worth noting that the telescopic rod has evenly spaced positioning holes inside, and the end of the threaded rod facing the storage groove is rotatably connected to a positioning head, the positioning head being adapted to the size of the positioning hole.

[0009] Furthermore, it should be noted that the connecting seat is rotatably connected to one end of the end fixing rod, the mounting block is fixedly connected to the top of the connecting seat, and the mounting block has a threaded hole inside.

[0010] In a preferred embodiment, the support structure is arranged at the front and rear, and the two central fixed rods are rotatably connected to the rotating shaft at staggered positions.

[0011] In a preferred embodiment, the positioning structure consists of a baffle, a fixing plate, and bolts. The horizontal plate of the lower chord has a fixing opening and a sliding opening. The baffle is fixedly connected to the front side of the fixing opening, and the fixing plate is fixedly connected to the rear side of the fixing opening. The fixing opening and the baffle are respectively provided with screw holes that are compatible with the bolts.

[0012] In a preferred embodiment, a baffle and a fixing plate are respectively provided on the front and rear sides of the end of the sliding port near the fixing port.

[0013] In a preferred embodiment, the size of the mounting block is adapted to the fixing port and the sliding port.

[0014] Compared with the prior art, the Bailey bridge structure provided by this utility model has at least the following beneficial effects:

[0015] (1) The support structure can effectively enhance the structural strength of the Bailey bridge at non-node and weak node positions, reduce stress concentration at these positions, and improve the overall load-bearing capacity. Through the design of telescopic rods and rotating shafts, the length of the sliding opening on the upper and lower chords can be designed according to the actual use, so that the Bailey bridge can flexibly adjust the support position and angle according to actual needs and adapt to different construction scenarios and load distributions.

[0016] (2) By setting up a positioning structure, the support structure is firmly fixed to the upper and lower chords with bolts, ensuring the stability of the support structure, reducing the loosening and deformation that may occur during use, making the installation and maintenance of the Bailey bridge easier, and enabling quick adjustment and fixing of the support structure, reducing construction time and cost. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a front view structural diagram of the present utility model;

[0019] Figure 3 This is a schematic diagram of the structure of this utility model without a supporting structure.

[0020] Figure 4 This is a schematic diagram of the positioning structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the support structure of this utility model.

[0022] In the diagram: 1. Upper chord; 2. Lower chord; 3. Support frame; 4. Diagonal brace; 5. Mounting hole; 6. Support structure; 7. Rotating shaft; 8. Positioning structure; 601. Middle fixing rod; 602. Telescopic rod; 603. Positioning hole; 604. Limiting plate; 605. End fixing rod; 606. Storage groove; 607. Threaded rod; 608. Connecting seat; 609. Mounting block; 610. Threaded hole; 801. Fixing port; 802. Sliding port; 803. Baffle; 804. Fixing plate; 805. Bolt. Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments.

[0024] Please see Figure 1-5 This utility model provides a Bailey bridge structure, including an upper chord 1, a lower chord 2, a support frame 3, a diagonal brace 4, a support structure 6, a rotating shaft 7, and a positioning structure 8. The lower chord 2 is fixedly connected to the lower part of the upper chord 1 through the support frame 3. The diagonal brace 4 is fixedly connected between the support frame 3 and the upper chord 1 and the lower chord 2. The upper chord 1 and the lower chord 2 are respectively provided with mounting holes 5. The support structure 6 is staggered on the front and rear sides of the diagonal brace 4. The positioning structure 8 is respectively provided inside the upper chord 1 and the lower chord 2.

[0025] Further as Figure 1 , Figure 3 and Figure 5As shown, it is worth noting that the support structure 6 consists of a central fixed rod 601, a telescopic rod 602, a limiting plate 604, an end fixed rod 605, a threaded rod 607, a connecting seat 608, and a mounting block 609. The telescopic rod 602 is symmetrically fixed to the upper and lower sides of the central fixed rod 601. The limiting plate 604 is fixedly connected to one end of the telescopic rod 602. The end fixed rod 605 has a storage groove 606 inside. The telescopic rod 602 slides inside the storage groove 606 through the limiting plate 604. The front end of one end of the end fixed rod 605 is threadedly connected to the threaded rod 607.

[0026] Further as Figure 1 , Figure 3 and Figure 5 As shown, it is worth noting that the telescopic rod 602 has evenly spaced positioning holes 603 inside, and the end of the threaded rod 607 facing the storage groove 606 is rotatably connected to a positioning head, the positioning head being matched with the size of the positioning hole 603.

[0027] The support structure 6, through components such as the central fixing rod 601, the telescopic rod 602, and the end fixing rod 605, can provide additional support at non-node and weak node positions of the Bailey bridge, enhancing the structural strength at these locations. By adjusting the length of the telescopic rod 602, it can adapt to different support requirements and ensure a uniform distribution of support force. Through the cooperation of the threaded rod 607 and the positioning hole 603, the telescopic rod 602 can be precisely adjusted and fixed, ensuring the stability of the support structure.

[0028] Further as Figure 1 , Figure 3 and Figure 5 As shown, it is worth noting that the connecting seat 608 is rotatably connected to one end of the end fixing rod 605, the mounting block 609 is fixedly connected to the top of the connecting seat 608, the mounting block 609 has a threaded hole 610 inside, the support structure 6 is arranged at the front and rear, and the two middle fixing rods 601 are rotatably connected to the rotating shaft 7 at staggered positions.

[0029] The two central fixed rods 601 are connected by a rotating shaft 7, which allows the support structure 6 to rotate and adjust flexibly to adapt to different support angles and positions.

[0030] As can be seen from the above working process: the support structure 6 can effectively enhance the structural strength of the Bailey bridge at non-node and weak node positions, reduce stress concentration at these positions, and improve the overall load-bearing capacity; through the design of the telescopic rod 602 and the rotating shaft 7, the length of the sliding port 802 on the upper chord 1 and the lower chord 2 can be designed according to the actual use, so that the Bailey bridge can flexibly adjust the support position and angle according to actual needs, and adapt to different construction scenarios and load distributions.

[0031] Further as Figure 2 , Figure 3 and Figure 4 As shown, it is worth noting that the positioning structure 8 consists of a baffle 803, a fixing plate 804, and bolts 805. The horizontal plate of the lower chord 2 is provided with a fixing port 801 and a sliding port 802. The baffle 803 is fixedly connected to the front side of the fixing port 801, and the fixing plate 804 is fixedly connected to the rear side of the fixing port 801. The fixing port 801 and the baffle 803 are respectively provided with screw holes that are compatible with bolts 805.

[0032] Further as Figure 2 , Figure 3 and Figure 4 As shown, it is worth noting that baffles 803 and fixing plates 804 are respectively provided on the front and rear sides of the end of the sliding port 802 near the fixed port 801.

[0033] The sliding port 802 facilitates the sliding of the mounting block 609, making it easier for the support structure 6 to be installed between the upper chord 1 and the lower chord 2, and also facilitating the subsequent fixing of the mounting block 609.

[0034] Further as Figure 2 , Figure 3 and Figure 4 As shown, it is worth noting that the dimensions of the mounting block 609 are adapted to the fixing port 801 and the sliding port 802;

[0035] The positioning structure 8 securely fixes the mounting block 609 of the support structure 6 to the upper and lower chords through the baffle 803, the fixing plate 804 and the bolts 805, ensuring the stability and load-bearing capacity of the support structure 6.

[0036] This solution involves the following steps: First, the support structure 6 is staggered on both sides of the diagonal brace 4. The two central fixed rods 601 are rotated and connected via the rotating shaft 7, ensuring the support structure 6 can rotate and be adjusted flexibly. Then, the mounting block 609 on one side of the support structure 6 is installed into the fixed opening 801. By adjusting the length of the telescopic rod 602, the support structure 6 is adapted to the actual support dimensions of the Bailey bridge. The mounting block 609 on the other side is installed into the sliding opening 802. Then, the mounting block 609 is sequentially connected to the baffle 803, threaded hole 610, and fixed plate 804, securing the mounting of the baffle 803. Simultaneously, the support dimensions of the support structure 6 are fixed. Next, the threaded rod 607 is rotated to drive the positioning head into the positioning hole 603, fixing the connection between the telescopic rod 602 and the end fixed rod 605. During the use of the Bailey bridge, the length of the sliding opening 802 can be designed according to the actual usage, thereby adjusting the length of the telescopic rod 602 and the position of the support structure 6 to adapt to different load distributions and support requirements.

[0037] In summary: The support structure 6 effectively enhances the structural strength of the Bailey bridge at non-node and weak node locations, reduces stress concentration at these locations, and improves the overall load-bearing capacity. The design of the telescopic rod 602 and rotating shaft 7 allows for the adjustment of the length of the sliding opening 802 on the upper chord 1 and lower chord 2 according to actual usage, enabling the Bailey bridge to flexibly adjust the support position and angle to adapt to different construction scenarios and load distributions. The positioning structure 8, secured to the upper and lower chords with bolts 805, ensures the stability of the support structure 6, reduces potential loosening and deformation during use, simplifies the installation and maintenance of the Bailey bridge, and allows for quick adjustment and fixation of the support structure, reducing construction time and costs.

Claims

1. A structure of a scaffolding, comprising upper chord (1), lower chord (2), support frame (3), diagonal strut (4), support structure (6), rotating shaft (7) and positioning structure (8), characterized in that: The lower chord (2) is fixedly connected below the upper chord (1) through the support frame (3), the diagonal brace (4) is fixedly connected between the support frame (3) and the upper chord (1) and the lower chord (2), the upper chord (1) and the lower chord (2) are respectively provided with mounting holes (5), the support structure (6) is staggered and arranged on the front and rear sides of the diagonal brace (4), and the positioning structure (8) is arranged in the upper chord (1) and the lower chord (2) respectively. The support structure (6) is composed of a middle fixed rod (601), an extension rod (602), a limiting plate (604), an end fixed rod (605), a threaded rod (607), a connecting seat (608) and a mounting block (609), the extension rod (602) is fixedly connected to the upper and lower sides of the middle fixed rod (601) in a symmetrical manner, the limiting plate (604) is fixedly connected to one end of the extension rod (602), the end fixed rod (605) is internally provided with a receiving groove (606), the extension rod (602) is slidably arranged in the receiving groove (606) through the limiting plate (604), and one end of the end fixed rod (605) is screw-connected with the threaded rod (607). The positioning structure (8) is composed of a baffle (803), a fixed plate (804) and a bolt (805), the transverse plate of the lower chord (2) is respectively provided with a fixed port (801) and a sliding port (802), the baffle (803) is fixedly connected to the front side of the fixed port (801), the fixed plate (804) is fixedly connected to the rear side of the fixed port (801), and the inner parts of the fixed port (801) and the baffle (803) are respectively provided with screw holes matched with the bolt (805).

2. A structure of a bailey frame according to claim 1, wherein: The extension rod (602) is uniformly provided with positioning holes (603) inside, one end of the threaded rod (607) is rotatably connected with a positioning head facing the receiving groove (606), and the positioning head is matched with the positioning holes (603) in size.

3. A structure of a bailey frame according to claim 2, wherein: The connecting seat (608) is rotatably connected to one end of the end fixed rod (605), the mounting block (609) is fixedly connected above the connecting seat (608), and the mounting block (609) is internally provided with a threaded hole (610).

4. The structure of a bailey frame according to claim 1, wherein: The support structure (6) is arranged in front of and behind, and the two middle fixed rods (601) are rotatably connected to the rotating shaft (7) at the staggered positions.

5. The structure of a bailey frame according to claim 1, wherein: The sliding port (802) is provided with the baffle (803) and the fixed plate (804) on the front and rear sides of one end close to the fixed port (801).

6. A structure of a bailey frame according to claim 5, wherein: The mounting block (609) is matched with the fixed port (801) and the sliding port (802) in size.

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