A basket-lifting arch bridge mid-span tie-rod working platform

Abstract

This application relates to the field of auxiliary equipment technology for building construction, and in particular to a mid-span tie-rod working platform for a basket arch bridge. The platform includes multiple cantilever brackets, supporting crossbars, steel planks, and guardrails. The cantilever brackets are detachably connected to the outer wall of the front box girder of the side span. The supporting crossbars are fixed to the upper end face of the cantilever brackets. At least two supporting crossbars are provided on each cantilever bracket. A mounting base is provided at the bottom of the steel plank, and a slot is formed on the lower end face of the mounting base to engage with the supporting crossbar. Limiting holes are formed on the outer wall of the supporting crossbar, and limiting rods are inserted into the limiting holes on the outer wall of the mounting base. The guardrails are fixed to the outer side of the upper end face of the steel plank for protection. This application improves the connection stability of the steel planks.

Description

Technical Field

[0001] This application relates to the field of auxiliary equipment technology for building construction, and in particular to a mid-span tie rod working platform for a basket arch bridge. Background Technology

[0002] Basket arch bridges are widely used in urban landscape bridges and mountain bridges due to their beautiful shape and strong span capacity. The mid-span tie rod, as the core load-bearing component of the basket arch bridge, is located at the top of the main span steel longitudinal beam and is tensioned at both ends. Its installation accuracy directly affects the overall stability of the bridge.

[0003] During the tie rod traction and installation construction, tie rod cantilever arms are set on the outside of multiple permanent cross brace positions using the permanent cross brace positions. Rollers are hung on the tie rod cantilever arms. Then, tie rod working platforms are erected at the front box girder positions of the two side spans to facilitate tie rod traction and installation by tie rod workers.

[0004] In the existing construction of tie-rod work platforms, cantilevered brackets are fixed to the outer wall of the front box girder of the side span. Steel planks are then laid on top of the cantilevered brackets and secured with wire, and finally, temporary high-altitude guardrails are installed. However, this method of securing the steel planks to the cantilevered brackets with wire results in low stability, making them prone to loosening during actual operations and posing safety hazards. Therefore, further improvements are needed. Utility Model Content

[0005] To address the aforementioned issues, this application provides a mid-span tie rod working platform for a basket arch bridge.

[0006] The technical solution for the mid-span tie rod working platform of the basket arch bridge provided in this application is as follows:

[0007] A mid-span tie-rod working platform for a basket arch bridge includes multiple cantilever brackets, support crossbars, steel planks, and guardrails. The cantilever brackets are detachably connected to the outer wall of the front box girder of the side span. The support crossbars are fixed to the upper end face of the cantilever brackets. At least two support crossbars are provided on each cantilever bracket. The bottom of the steel plank is provided with a card seat. The lower end face of the card seat has a slot for engaging the support crossbar. Limiting holes are provided on the outer wall of the support crossbar. Limiting rods inserted into the limiting holes are provided on the outer wall of the card seat. The guardrails are fixed to the outer side of the upper end face of the steel plank for protection.

[0008] By adopting the above technical solution, the support crossbar is fixed on the cantilever bracket to provide support for the steel scaffolding; the slot of the bottom bracket of the steel scaffolding is engaged with the support crossbar, and the limiting rod is inserted into the limiting hole to restrict the sliding freedom of the bracket, thereby improving the stability of the connection between the steel scaffolding and the support crossbar; the guardrail can protect the workers and ensure the safety of the operation.

[0009] Preferably, the limiting rod is a screw threaded through the outer wall of the card seat.

[0010] By adopting the above technical solution, the limiting rod is a screw threaded through the outer wall of the card seat, which can be easily inserted into or pulled out of the limiting hole by rotating the screw.

[0011] Preferably, the limiting rod slides through the outer wall of the card holder, and the outer wall of the card holder is provided with an elastic element that forces the limiting rod to slide and insert into the limiting hole in a normal state.

[0012] By adopting the above technical solution, the limiting rod is slidably inserted through the outer wall of the card seat, and the outer wall of the card seat is provided with an elastic element that forces the limiting rod to slide and insert into the limiting hole in a normal state. This allows the limiting rod to automatically insert into the limiting hole under the action of the elastic element, thereby enhancing the stability and reliability of the connection between the steel scaffold and the supporting crossbar. The addition of the elastic element reduces the possibility of the limiting rod coming out of the limiting hole without external force.

[0013] Preferably, a force-applying plate is fixedly connected to the outer end of the limiting rod, and the elastic element is a spring sleeved on the limiting rod. One end of the spring is fixedly connected to the outer wall of the card seat, and the other end of the spring is fixedly connected to the force-applying plate.

[0014] Preferably, the card holder is slidably connected to the steel scaffold along the length of the steel scaffold, and the steel scaffold is provided with an adjustment component for adjusting the sliding position of the card holder.

[0015] By adopting the above technical solution, the card holder can slide along the length of the steel scaffold, and its position can be flexibly adjusted to fit the support crossbars at different positions; an adjustment component is set to facilitate precise adjustment of the sliding position of the card holder, thereby better securing the card holder to the support crossbars.

[0016] Preferably, the lower end face of the steel scaffold has a sliding groove, and the card seat is fixedly connected to a slider that is slidably connected to the sliding groove.

[0017] By adopting the above technical solution, the sliding assembly of the card holder and the steel scaffold can be achieved through the cooperation of the sliding groove and the slider.

[0018] Preferably, the adjusting assembly includes a lead screw rotatably connected to the inner wall of the sliding groove, the lead screw being threaded through the slider, and the axial direction of the lead screw being parallel to the sliding direction of the slider.

[0019] By adopting the above technical solution, the sliding position of the card holder in the length direction of the steel scaffold is adjusted through the threaded engagement of the lead screw and the slider, so that the card holder can be accurately locked onto the support crossbar.

[0020] Preferably, the lower end face of the steel scaffold has an operating groove in the middle, one end of the lead screw extends into the operating groove, and the adjustment assembly also includes a knob built into the operating groove and coaxially fixedly connected to the end of the lead screw.

[0021] By adopting the above technical solution, the end of the lead screw is extended to the operating groove and a knob is set there. The knob can be easily rotated in the operating groove to drive the lead screw to rotate, thereby adjusting the position of the slider in the sliding groove and realizing the sliding adjustment of the card seat along the length of the steel scaffold to adapt to different installation requirements.

[0022] In summary, this utility model has the following beneficial effects:

[0023] 1. The support crossbar is fixed to the cantilever bracket to provide support for the steel scaffolding; the slot of the bottom bracket of the steel scaffolding is engaged with the support crossbar, and the limiting rod is inserted into the limiting hole to restrict the sliding freedom of the bracket, thereby improving the stability of the connection between the steel scaffolding and the support crossbar; the guardrail can protect the workers and ensure the safety of the operation.

[0024] 2. The limiting rod slides through the outer wall of the card seat, and the outer wall of the card seat is provided with an elastic element that forces the limiting rod to slide and insert into the limiting hole in a normal state. This allows the limiting rod to automatically insert into the limiting hole under the action of the elastic element, which enhances the stability and reliability of the connection between the steel scaffold and the supporting crossbar. The addition of the elastic element reduces the possibility of the limiting rod coming out of the limiting hole without the action of external force.

[0025] 3. The card holder can slide along the length of the steel scaffolding, and its position can be flexibly adjusted to fit the support crossbars at different positions; an adjustment component is provided to facilitate precise adjustment of the sliding position of the card holder, so as to better secure the card holder to the support crossbars. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a mid-span tie-rod work platform for a basket-lifting arch bridge.

[0027] Figure 2 This is a schematic diagram of the connection structure between the cantilever bracket and the steel plank;

[0028] Figure 3 This is a schematic diagram of the connection structure between the cantilevered corbel and the mounting crossbar;

[0029] Figure 4 This is a structural diagram of a steel scaffolding plank;

[0030] Figure 5 yes Figure 4 A magnified view of a portion at point A.

[0031] In the diagram, 1. Cantilever bracket; 11. Mounting arm; 12. Diagonal arm; 13. First mounting plate; 14. Second mounting plate; 2. Support crossbar; 21. Third mounting plate; 22. Limiting hole; 3. Steel scaffolding; 31. Sliding groove; 32. Operating groove; 33. Guide rod; 34. Sliding block; 35. Adjustment component; 351. Lead screw; 352. Knob; 4. Guardrail plate; 5. Card seat; 51. Card slot; 52. Limiting rod; 521. Guide surface; 522. Force plate; 53. Spring; 6. External corner bracket; 61. Corner irregular plate. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0033] Example 1:

[0034] This application discloses a mid-span tie-bar work platform for a basket arch bridge, referring to... Figure 1 , Figure 2 The structure includes multiple cantilever brackets 1, supporting crossbars 2, steel planks 3, and guardrails 4. The multiple cantilever brackets 1 are detachably connected to two adjacent outer walls of the front end box girder of the side span. Specifically, each cantilever bracket 1 includes a mounting arm 11 and a diagonal arm 12. The mounting arm 11 is horizontally positioned, and one end of the mounting arm 11 is fixedly connected to a first mounting plate 13, which is bolted to the outer wall of the front end box girder of the side span. One end of the diagonal arm 12 is fixedly connected to the lower end face of the diagonal arm 12 away from the front end box girder of the side span, and the other end of the diagonal arm 12 is fixedly connected to a second mounting plate 14 located below the first mounting plate 13, which is bolted to the outer wall of the front end box girder of the side span.

[0035] Reference Figure 2 , Figure 3 The support crossbars 2 are fixed to the upper end face of the mounting arm 11. In this embodiment, two rows of support crossbars 2 are provided on one mounting arm 11. The support crossbars 2 are horizontally arranged and perpendicular to the mounting arm 11. The two ends of a single support crossbar 2 are detachably connected to two adjacent mounting arms 11. A third mounting plate 21 is fixedly connected to the end of the support crossbar 2. The third mounting plate 21 is fixed to the upper end face of the mounting arm 11 by bolts. Limiting holes 22 are provided on the opposite sidewalls of the two rows of support crossbars 2. Multiple limiting holes 22 are provided and are spaced apart along the length direction of the support crossbar 2.

[0036] Reference Figure 3 , Figure 4Multiple steel planks 3 are laid on the supporting crossbars 2. Specifically, each of the bottom ends of the steel plank 3 is provided with a retaining seat 5. The lower end face of the steel plank 3 has sliding grooves 31 on both sides, which extend along the length of the steel plank 3. The lower end face of the steel plank 3 has an operating groove 32 located between two sliding grooves 31. A guide rod 33 is fixedly connected to the inner wall of the sliding groove 31, and a slider 34 that is slidably sleeved on the guide rod 33 is fixedly connected to the retaining seat 5. The steel scaffold 3 is equipped with an adjustment component 35 for adjusting the sliding position of the slider 34. The adjustment component 35 includes a lead screw 351 and a knob 352. One end of the lead screw 351 is rotatably connected to the inner wall of the sliding groove 31. The lead screw 351 is threaded through the slider 34. The axial direction of the lead screw 351 is parallel to the sliding direction of the slider 34. The other end of the lead screw 351 extends into the operating groove 32. The knob 352 is built into the operating groove 32 and is coaxially fixedly connected to the end of the lead screw 351.

[0037] Reference Figure 4 , Figure 5 The lower end face of the card holder 5 has a slot 51 for engaging with the supporting crossbar 2, and the outer wall of the card holder 5 has a limiting rod 52 inserted into the limiting hole 22. In this embodiment, the limiting rod 52 slides through the outer wall of the card holder 5, and the outer wall of the card holder 5 is provided with an elastic element that forces the limiting rod 52 to slide into the limiting hole 22 in a normal state. Specifically, a force-applying plate 522 is fixedly connected to the outer end of the limiting rod 52, and the elastic element is a spring 53 sleeved on the limiting rod 52. One end of the spring 53 is fixedly connected to the outer wall of the card holder 5, and the other end of the spring 53 is fixedly connected to the force-applying plate 522. The end of the limiting rod 52 has a guide surface 521 for the upper end face of the supporting crossbar 2 to abut against, thereby forcing the limiting rod 52 to slide away from the limiting hole 22. In other embodiments, the limiting rod 52 is a screw threaded through the outer wall of the card holder 5.

[0038] Reference Figure 1 , Figure 2 A corner bracket 6 is fixedly connected to the external corner of the front end box girder of the side span. The corner bracket 6 is fixedly connected to the adjacent cantilever corbel 1. A corner irregular plate 61 is fixedly connected to the corner bracket 6. The two sides of the corner irregular plate 61 are fixedly connected to the supporting crossbars 2 on both sides by bolts. The guardrail plate 4 is fixedly connected to the steel plank 3 and the outer side of the upper end face of the corner irregular plate 61 by bolts for protection.

[0039] The implementation principle of the mid-span tie rod operation platform of the basket arch bridge in this application embodiment is as follows: First, a cantilever bracket 1 is installed on the outer wall of the box girder at the front end of the side span. Then, the support crossbar 2 is installed on the cantilever bracket 1. Next, the steel scaffolding 3 is laid. During the laying of the steel scaffolding 3, the sliding position of the card seat 5 is first adjusted by the adjustment component 35. Then, the card slot 51 of the card seat 5 is locked into the support crossbar 2. The upper end surface of the support crossbar 2 abuts against the guide surface 521 of the limiting rod 52, thereby forcing the limiting rod 52 to slide outward. When the limiting hole 22 and the limiting rod 52 are aligned, the limiting rod 52 slides into the limiting hole 22 under the action of the spring 53, which restricts the sliding freedom of the card seat 5, improves the stability of the connection between the steel scaffolding 3 and the support crossbar 2 and improves the installation efficiency of the steel scaffolding 3. After the steel scaffolding 3 is laid, the external corner bracket 6 and the corner irregular plate 61 are installed. Finally, the guardrail plate 4 is installed.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A basket handling platform for a tied arch bridge, characterised in that: It includes multiple cantilever brackets (1), support crossbars (2), steel planks (3) and guardrails (4). The cantilever brackets (1) are detachably connected to the outer wall of the front box girder of the side span. The support crossbars (2) are fixed to the upper end face of the cantilever brackets (1). At least two support crossbars (2) are provided on one cantilever bracket (1). The bottom of the steel plank (3) is provided with a card seat (5). The lower end face of the card seat (5) is provided with a card groove (51) that is locked to the support crossbar (2). The outer wall of the support crossbar (2) is provided with a limit hole (22). The outer wall of the card seat (5) is provided with a limit rod (52) that is inserted into the limit hole (22). The guardrails (4) are fixed to the outer side of the upper end face of the steel plank (3) for protection.

2. A basket handle arch bridge midspan tieback work platform according to claim 1, characterised in that: The limiting rod (52) is a threaded rod that passes through the outer wall of the card seat (5).

3. A basket handle arch bridge midspan tieback work platform according to claim 1, characterised in that: The limiting rod (52) slides through the outer wall of the card holder (5), and the outer wall of the card holder (5) is provided with an elastic element that forces the limiting rod (52) to slide and insert into the limiting hole (22) in a normal state.

4. A basket handle arch bridge midspan tieback work platform according to claim 3, characterised in that: The outer end of the limiting rod (52) is fixedly connected to a force plate (522), and the elastic element is a spring (53) sleeved on the limiting rod (52). One end of the spring (53) is fixedly connected to the outer wall of the card seat (5), and the other end of the spring (53) is fixedly connected to the force plate (522).

5. The basket-lifting arch bridge mid-span tie rod working platform according to claim 1, characterized in that: The card holder (5) is slidably connected to the steel scaffold (3) along the length direction of the steel scaffold (3), and the steel scaffold (3) is provided with an adjustment component (35) for adjusting the sliding position of the card holder (5).

6. The basket-lifting arch bridge mid-span tie rod working platform according to claim 5, characterized in that: The lower end face of the steel scaffold (3) has a sliding groove (31), and the card seat (5) is fixedly connected to a slider (34) that is slidably connected to the sliding groove (31).

7. The basket-lifting arch bridge mid-span tie rod working platform according to claim 6, characterized in that: The adjustment assembly (35) includes a lead screw (351) rotatably connected to the inner wall of the sliding groove (31), the lead screw (351) being threaded through the slider (34), and the axial direction of the lead screw (351) being parallel to the sliding direction of the slider (34).

8. The basket-lifting arch bridge mid-span tie rod working platform according to claim 7, characterized in that: The lower end face of the steel scaffold (3) has an operating groove (32) in the middle. One end of the lead screw (351) extends into the operating groove (32). The adjustment assembly (35) also includes a knob (352) built into the operating groove (32) and coaxially fixedly connected to the end of the lead screw (351).

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