Arch bridge viewing platform structure and construction method thereof

Abstract

This invention discloses the structure and construction method of an arch bridge viewing platform. The specific structure includes a main beam, with prefabricated platform sections symmetrically arranged on both sides of the main beam along the bridge's centerline. The outer walls of the prefabricated platform sections are connected to cantilevered splicing sections. The ends of the two cantilevered splicing sections furthest from the bridge's centerline coincide with the ends of the main beam. End caps are provided at the ends of the main beam. The inner walls of the prefabricated platform sections are connected to main arch ribs. This invention's arch bridge viewing platform structure solves the problem of poor overall structural integrity in existing arch bridge viewing platforms. The construction method of this invention is simple to operate and allows for rapid construction.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology, specifically relating to the construction of an arch bridge viewing platform, and also to a construction method for the aforementioned structure. Background Technology

[0002] Arch bridge viewing platforms are typically designed for mid-span and under-span arch bridges where strong viewing demands are present, and are usually located atop the main girder or main arch. These platforms enhance the bridge's aesthetics while providing a place for pedestrians to rest and enjoy the view. To achieve a good visual effect, pedestrian viewing platforms on the main girder are generally quite large, often 1.5 to 2 times wider than the standard width of the main girder. This results in complex construction and uncertain load transmission, posing significant challenges to both design and construction. Current technologies for large-scale viewing platforms often employ longitudinal and transverse beam main girders or steel truss main girders. Both of these main girder types have poor overall structural integrity, leading to poor seismic and wind resistance, and heavy construction segments. Steel box girder solutions with better overall structural integrity are virtually nonexistent. These issues, to some extent, limit the application of large-scale viewing platforms on arch bridges. Summary of the Invention

[0003] The purpose of this invention is to provide a structure for an arch bridge viewing platform, thereby solving the problem of poor overall structural integrity in existing arch bridge viewing platforms.

[0004] The purpose of this invention is to provide a construction method for an arch bridge viewing platform.

[0005] The technical solution adopted in this invention is an arch bridge viewing platform structure, including a main beam, with prefabricated platform sections symmetrically arranged on both sides of the main beam along the bridge centerline. The outer walls of the prefabricated platform sections are connected to cantilever splicing sections. The ends of the two cantilever splicing sections away from the bridge centerline coincide with the ends of the main beam. The ends of the main beam are provided with end sealing plates. The inner walls of the prefabricated platform sections are connected to main arch ribs.

[0006] The invention is further characterized in that,

[0007] The platform prefabricated section includes a prefabricated section top plate and a prefabricated section bottom plate. Several prefabricated section webs are connected between the prefabricated section top plate and the prefabricated section bottom plate, and several prefabricated section webs are set on the outer wall of the main arch rib.

[0008] The top plate of the precast section is provided with several stiffening ribs, the bottom plate of the precast section is provided with several stiffening ribs, and the web of each precast section is provided with several stiffening ribs from top to bottom. The stiffening ribs of the top plate of the precast section are arranged parallel to the stiffening ribs of the bottom plate of the precast section, and the stiffening ribs of the top plate of the precast section are arranged perpendicular to the stiffening ribs of the web of the precast section.

[0009] The cantilevered splicing section includes a splicing section top slab and a splicing section bottom slab. Several splicing section web plates connect the splicing section top slab and the splicing section bottom slab. The splicing section top slab is connected to the precast section top slab, the splicing section bottom slab is connected to the precast section bottom slab, and the splicing section web plates are connected to the precast section web plates one by one.

[0010] Several stiffening ribs are provided on the top plate of the spliced ​​section, and several stiffening ribs are provided on the bottom plate of the spliced ​​section. Several stiffening ribs are provided on the web of each spliced ​​section from top to bottom. Several stiffening ribs on the top plate of the spliced ​​section are arranged parallel to the stiffening ribs on the top plate of the precast section, and several stiffening ribs on the bottom plate of the spliced ​​section are arranged parallel to the stiffening ribs on the bottom plate of the precast section. The stiffening ribs on the web of the spliced ​​section are connected to the stiffening ribs on the web of the precast section and are in a straight line.

[0011] The end cap includes a cap plate, which is installed at the end of the main beam.

[0012] The sealing plate has several sealing plate stiffening ribs arranged from top to bottom.

[0013] Another technical solution adopted in this invention is a construction method for an arch bridge viewing platform, which is implemented according to the following steps:

[0014] Step 1: Weld the prefabricated platform section to the outer wall of the main arch rib;

[0015] Step 2: Weld the cantilevered splicing section to the outer wall of the prefabricated platform section;

[0016] Step 3: After hoisting the main beam to the designed position at the construction site, weld the cantilevered splice section welded in Step 2 onto the main beam to form the arched viewing platform.

[0017] Step 4: After welding the end caps to the ends of the main beam, the construction of the arch bridge viewing platform is completed.

[0018] The invention is further characterized in that,

[0019] The specific process of step 1 is as follows:

[0020] The top plate of the precast section is welded to the top of the web of the precast section, and the bottom plate of the precast section is welded to the bottom of the web of the precast section. Several stiffening ribs of the top plate of the precast section are welded to the top plate of the precast section. The stiffening ribs of the top plate of the precast section on opposite sides are arranged parallel to each other. Several stiffening ribs of the bottom plate of the precast section are welded to the bottom plate of the precast section. The stiffening ribs of the bottom plate of the precast section on opposite sides are arranged parallel to each other. Two stiffening ribs of the web of the precast section are welded to the web of the precast section on the side near the end cap to form a platform precast section. Then the top plate, web, and bottom plate of the precast section are all welded to the outer wall of the main arch rib.

[0021] The specific process of step 2 is as follows:

[0022] Several stiffening ribs for the top plate of the spliced ​​section are welded to the top plate of the spliced ​​section, and several stiffening ribs for the bottom plate of the spliced ​​section are welded to the bottom plate of the spliced ​​section. The stiffening ribs for the top plate of the spliced ​​section on opposite sides are arranged parallel to each other, and the stiffening ribs for the bottom plate of the spliced ​​section on opposite sides are arranged parallel to each other. The stiffening ribs for the web plate of the spliced ​​section are welded to the web plate of the spliced ​​section to form a cantilevered spliced ​​section. Then, the top plate of the spliced ​​section is welded to the top plate of the precast section, the bottom plate of the spliced ​​section is welded to the bottom plate of the precast section, the sidewalls of the web plate of the spliced ​​section are welded to the web plate of the precast section, the top end of the web plate of the spliced ​​section is welded to the top plate of the spliced ​​section, the bottom end of the web plate of the spliced ​​section is welded to the bottom plate of the spliced ​​section, and one end of the stiffening rib of the web plate of the spliced ​​section is welded to one end of the stiffening rib of the web plate of the precast section to form a straight line.

[0023] The specific process of step 3 is as follows:

[0024] After the main beam is hoisted to the design position at the construction site, the top plate, bottom plate, and web of the spliced ​​section away from the main arch rib are welded to the main beam to form the viewing platform on the arch.

[0025] The specific process of step 4 is as follows:

[0026] Several stiffening ribs are welded to the end plate, and then the end plate is welded to the end of the main beam. The end plate is then welded to the top plate, bottom plate, and web plate of the splicing section, thus completing the construction of the arch bridge viewing platform.

[0027] The beneficial effects of this invention are:

[0028] (1) The arch bridge viewing platform structure of the present invention has a wind nozzle-shaped end cap, which can improve the wind resistance stability of the bridge section.

[0029] (2) The arch bridge viewing platform structure of the present invention has a clear system stress, good integrity, and a safe and reliable structure.

[0030] (3) The arch bridge viewing platform structure of the present invention comprises six parts: main beam, main arch rib, platform prefabricated section, cantilever splicing section and end sealing plate. It can be prefabricated and assembled in sections and in different sites, which can reduce the size and weight of individual components, thereby saving construction site and hoisting equipment and providing convenience for construction.

[0031] (4) The construction method of the bridge viewing platform of the present invention is simple to operate and quick to construct. Attached Figure Description

[0032] Figure 1 This is a three-dimensional schematic diagram of the arch bridge viewing platform structure of the present invention;

[0033] Figure 2 This is a plan view of the arch bridge viewing platform structure of the present invention;

[0034] Figure 3 This is an elevation view of the arch bridge viewing platform structure of the present invention;

[0035] Figure 4 This is a schematic diagram of the connection between the main arch rib and the main beam in the construction of the arch bridge viewing platform of the present invention;

[0036] Figure 5 This is an elevation view of the prefabricated platform section in the arch bridge viewing platform structure of the present invention;

[0037] Figure 6 This is a plan view of the prefabricated platform section in the arch bridge viewing platform structure of the present invention;

[0038] Figure 7 This is an elevation view of the cantilevered splicing section in the arch bridge viewing platform structure of the present invention;

[0039] Figure 8 This is a plan view of the cantilevered splicing section in the arch bridge viewing platform structure of the present invention;

[0040] Figure 9 This is a schematic diagram illustrating the application of the arch bridge viewing platform structure of the present invention.

[0041] In the diagram, 1. Main beam, 2. Main arch rib, 3. Precast platform section, 4. Cantilever splicing section, 5. End cap, 6. Arch foot;

[0042] 31. Precast section top slab, 32. Precast section bottom slab, 33. Precast section web slab, 34. Precast section top slab stiffening rib, 35. Precast section bottom slab stiffening rib, 36. Precast section web slab stiffening rib;

[0043] 41. Top plate of spliced ​​section; 42. Bottom plate of spliced ​​section; 43. Web plate of spliced ​​section; 44. Stiffening rib of top plate of spliced ​​section; 45. Stiffening rib of bottom plate of spliced ​​section; 46. Stiffening rib of web plate of spliced ​​section.

[0044] 51. Sealing plate component; 52. Sealing plate stiffening rib. Detailed Implementation

[0045] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0046] Example 1

[0047] The arch bridge viewing platform structure of this invention, as follows: Figure 1 , Figure 2 and Figure 3As shown, the structure includes a main beam 1, with precast platform sections 3 symmetrically arranged on both sides of the main beam 1 along the bridge centerline. The outer walls of the precast platform sections 3 are connected to cantilevered splicing sections 4. The ends of the two cantilevered splicing sections 4 furthest from the bridge centerline coincide with the ends of the main beam 1. End caps 5 are installed at the ends of the main beam 1. The inner walls of the precast platform sections 3 are connected to main arch ribs 2, which are arranged in a figure-eight shape. Figure 9 As shown, the bottom end of the main arch rib 2 is connected to the arch foot 6.

[0048] like Figure 4 , Figure 5 and Figure 6 As shown, the platform prefabricated section 3 includes a prefabricated section top plate 31 and a prefabricated section bottom plate 32. Several prefabricated section web plates 33 connect the prefabricated section top plate 31 and the prefabricated section bottom plate 32. These web plates 33 are disposed on the outer wall of the main arch rib 2. The web plates 33 near the prefabricated section top plate 31 are parallel to the prefabricated section top plate 31, and the web plates 33 near the prefabricated section bottom plate 32 are parallel to the prefabricated section bottom plate 32. The prefabricated section bottom plate 32 near the end cap 5 is set at an obtuse angle to its vertical side. The axes of the prefabricated section top plate 31, the prefabricated section bottom plate 32, and the prefabricated section web plates 33 are aligned.

[0049] like Figure 7 and Figure 8 As shown, the cantilever splicing section 4 includes a splicing section top plate 41 and a splicing section bottom plate 42. Several splicing section web plates 43 are connected between the splicing section top plate 41 and the splicing section bottom plate 42. The splicing section top plate 41 is connected to the precast section top plate 31, the splicing section bottom plate 42 is connected to the precast section bottom plate 32, and the splicing section web plates 43 are connected to the precast section web plates 33 and correspond one-to-one. The splicing section bottom plate 42 near the end sealing plate 5 is welded to the precast section bottom plate 32 near the end sealing plate 5 and is set on the same plane. The splicing section bottom plate 42 near the end sealing plate 5 is set at an acute angle to the horizontal plane. The slope of the bottom plate 42 of the cantilever splicing section 4 is a combination of longitudinal and transverse slopes, which is achieved by adjusting the slope of the top plate 41, the bottom plate 42, and the web plate 43 of the splicing section. Furthermore, the outer sides of the top plate 41 and the bottom plate 42 of the splicing section are both arc-shaped, which can adapt to the external landscape requirements of the viewing platform and has an aesthetically pleasing design.

[0050] The end cap 5 includes a cap plate 51, which is disposed at the end of the main beam 1. The cap plate 51 is provided with several cap plate stiffening ribs 52 from top to bottom. Each cap plate stiffening rib 52 is perpendicular to the cap plate 51 it is located on. The end cap 5 is shaped like a vent, that is, the upper end of the cap plate 51 is vertically disposed and the lower end is obtusely angled to the upper end.

[0051] Example 2

[0052] The difference from Embodiment 1 is that: a number of precast section top plate stiffening ribs 34 are provided on the precast section top plate 31, a number of precast section bottom plate stiffening ribs 35 are provided on the precast section bottom plate 32, and a number of precast section web plate stiffening ribs 36 are provided from top to bottom on each precast section web plate 33. The precast section top plate stiffening ribs 34 and the precast section bottom plate stiffening ribs 35 are arranged parallel to each other, and the precast section top plate stiffening ribs 34 and the precast section web plate stiffening ribs 36 are arranged perpendicular to each other.

[0053] Example 3

[0054] The difference from Embodiment 2 is that: the splicing section top plate 41 is provided with a plurality of splicing section top plate stiffening ribs 44, the splicing section bottom plate 42 is provided with a plurality of splicing section bottom plate stiffening ribs 45, and each splicing section web plate 43 is provided with a plurality of splicing section web plate stiffening ribs 46 from top to bottom. The plurality of splicing section top plate stiffening ribs 44 are arranged parallel to the precast section top plate stiffening ribs 34, the plurality of splicing section bottom plate stiffening ribs 45 are arranged parallel to the precast section bottom plate stiffening ribs 35, the splicing section web plate stiffening ribs 46 are connected to the precast section web plate stiffening ribs 36 and are in a straight line, and a splicing section web plate stiffening rib 46 is welded between two splicing section web plate stiffening ribs 46.

[0055] Example 4

[0056] The construction method for the arch bridge viewing platform of this invention is implemented according to the following steps:

[0057] Step 1: Weld the prefabricated platform section 3 to the outer wall of the main arch rib 2;

[0058] The specific process of step 1 is as follows:

[0059] Main beam 1 is formed in advance by welding main beam plates, and main arch rib 2 is formed in advance by welding main arch rib plates.

[0060] The precast section top plate 31 is welded to the top of the precast section web plate 33, and the precast section bottom plate 32 is welded to the bottom of the precast section web plate 33. Several precast section top plate stiffening ribs 34 are welded to the precast section top plate 31, with the precast section top plate stiffening ribs 34 on opposite sides arranged parallel to each other. Several precast section bottom plate stiffening ribs 35 are welded to the precast section bottom plate 32, with the precast section bottom plate stiffening ribs 35 on opposite sides arranged parallel to each other. Two precast section web plate stiffening ribs 36 are welded to the precast section web plate 33 on the side near the end sealing plate 5 to form a platform precast section. Then, the precast section top plate 31, precast section web plate 33, and precast section bottom plate 32 are all welded to the outer wall of the main arch rib 2. The axes of the precast section top plate 31, precast section bottom plate 32, and precast section web plate 33 are aligned.

[0061] Step 2: Weld the cantilevered splicing section 4 to the outer wall of the platform prefabricated section 3;

[0062] The specific process of step 2 is as follows:

[0063] Several stiffening ribs 44 on the top plate of the splicing section are welded to the top plate 41 of the splicing section, and several stiffening ribs 45 on the bottom plate of the splicing section are welded to the bottom plate 42 of the splicing section. The stiffening ribs 44 on the top plate of the splicing section on opposite sides are arranged parallel to each other, and the stiffening ribs 45 on the bottom plate of the splicing section on opposite sides are arranged parallel to each other. The stiffening ribs 46 on the web plate of the splicing section are welded to the web plate 43 of the splicing section to form a cantilevered splicing section. The top plate 41 of the splicing section is welded to the top plate 31 of the precast section, and the bottom plate 42 of the splicing section is welded to the bottom plate 31 of the precast section. 2. Welding: Weld the sidewalls of the spliced ​​section web plate 43 to the precast section web plate 33, weld the top of the spliced ​​section web plate 43 to the spliced ​​section top plate 41, weld the bottom of the spliced ​​section web plate 43 to the spliced ​​section bottom plate 42, and weld one end of the spliced ​​section web stiffener 46 to one end of the precast section web stiffener 36 in a straight line; During the welding process, the axis of the precast section top plate 31 is aligned with the axis of the spliced ​​section top plate 41, the axis of the precast section bottom plate 32 is aligned with the axis of the spliced ​​section bottom plate 42, and the axis of the precast section web plate 33 is aligned with the axis of the spliced ​​section web plate 43.

[0064] Step 3: After hoisting the main beam 1 to the designed position at the construction site, weld the cantilevered splice section 4, which was welded in Step 2, onto the main beam 1 to form the arched viewing platform.

[0065] The specific process of step 3 is as follows:

[0066] After the main beam 1 is hoisted to the design position at the construction site, the top plate 41 of the splicing section, the bottom plate 42 of the splicing section, and the web plate 43 of the splicing section away from the main arch rib 2 are welded to the main beam 1 to form the viewing platform on the arch.

[0067] Step 4: After welding the end cap 5 to the end of the main beam 1, the construction of the arch bridge viewing platform is completed.

[0068] The specific process of step 4 is as follows:

[0069] Several stiffening ribs 52 of the sealing plate are welded to the sealing plate 51, and the sealing plate 51 is then welded to the end of the main beam 1. The sealing plate 51 is also welded to the top plate 41 of the splicing section, the bottom plate 42 of the splicing section, and the web plate 43 of the splicing section, thus completing the construction of the arch bridge viewing platform.

Claims

1. An arch bridge viewing platform construction, characterized by, The main beam (1) is provided with platform prefabricated sections (3) symmetrically arranged on both sides of the main beam (1) along the bridge centerline. The outer wall of the platform prefabricated section (3) is connected with a cantilever splicing section (4). The ends of the two cantilever splicing sections (4) away from the bridge centerline coincide with the ends of the main beam (1). The ends of the main beam (1) are provided with end sealing plates (5). The inner wall of the platform prefabricated section (3) is connected with a main arch rib (2). The platform prefabricated section (3) includes a prefabricated section top plate (31) and a prefabricated section bottom plate (32). A plurality of prefabricated section web plates (33) are connected between the prefabricated section top plate (31) and the prefabricated section bottom plate (32). The plurality of prefabricated section web plates (33) are disposed on the outer wall of the main arch rib (2). The precast section top plate (31) is provided with a number of precast section top plate stiffening ribs (34), the precast section bottom plate (32) is provided with a number of precast section bottom plate stiffening ribs (35), and each precast section web plate (33) is provided with a number of precast section web plate stiffening ribs (36) from top to bottom. The precast section top plate stiffening ribs (34) and the precast section bottom plate stiffening ribs (35) are arranged parallel to each other, and the precast section top plate stiffening ribs (34) and the precast section web plate stiffening ribs (36) are arranged perpendicular to each other. The cantilevered splicing section (4) includes a splicing section top plate (41) and a splicing section bottom plate (42). A plurality of splicing section web plates (43) are connected between the splicing section top plate (41) and the splicing section bottom plate (42). The splicing section top plate (41) is connected to the precast section top plate (31), the splicing section bottom plate (42) is connected to the precast section bottom plate (32), and the splicing section web plates (43) are connected to the precast section web plates (33) and correspond one-to-one. The splicing section top plate (41) is provided with a number of splicing section top plate stiffening ribs (44), the splicing section bottom plate (42) is provided with a number of splicing section bottom plate stiffening ribs (45), and each splicing section web plate (43) is provided with a number of splicing section web plate stiffening ribs (46) from top to bottom. The splicing section top plate stiffening ribs (44) are arranged parallel to the precast section top plate stiffening ribs (34), the splicing section bottom plate stiffening ribs (45) are arranged parallel to the precast section bottom plate stiffening ribs (35), and the splicing section web plate stiffening ribs (46) are connected to the precast section web plate stiffening ribs (36) and are in a straight line.

2. The arch bridge viewing platform construction of claim 1, wherein The end cap (5) includes a cap plate (51) which is disposed at the end of the main beam (1).

3. The arch bridge viewing platform construction of claim 2, wherein The sealing plate (51) is provided with several sealing plate stiffening ribs (52) from top to bottom.

4. The construction method of an arch bridge viewing platform construction according to claim 3, characterized in that, The specific steps are as follows: Step 1: Weld the prefabricated platform section (3) to the outer wall of the main arch rib (2); The specific process of step 1 is as follows: The top plate (31) of the precast section is welded to the top of the web plate (33) of the precast section, the bottom plate (32) of the precast section is welded to the bottom of the web plate (33) of the precast section, several stiffening ribs (34) of the top plate of the precast section are welded to the top plate (31) of the precast section, and the stiffening ribs (34) of the top plate of the precast section on opposite sides are arranged parallel to each other, several stiffening ribs (35) of the bottom plate of the precast section are welded to the bottom plate (32) of the precast section, and the stiffening ribs (35) of the bottom plate of the precast section on opposite sides are arranged parallel to each other, two stiffening ribs (36) of the web plate of the precast section are welded to the web plate (33) of the precast section on the side near the end sealing plate (5) to form a platform precast section, and then the top plate (31), the web plate (33) of the precast section, and the bottom plate (32) of the precast section are all welded to the outer wall of the main arch rib (2); Step 2: Weld the cantilever splicing section (4) to the outer wall of the platform prefabricated section (3); The specific process of step 2 is as follows: Several stiffening ribs (44) of the top plate of the splicing section are welded to the top plate (41) of the splicing section, and several stiffening ribs (45) of the bottom plate of the splicing section are welded to the bottom plate (42) of the splicing section. The stiffening ribs (44) of the top plate of the splicing section on opposite sides are arranged parallel to each other, and the stiffening ribs (45) of the bottom plate of the splicing section on opposite sides are arranged parallel to each other. The stiffening ribs (46) of the web plate of the splicing section are welded to the web plate (43) of the splicing section to form a cantilevered splicing section. The top plate (41) of the splicing section is then... The corresponding top plate (31) of the splicing section is welded to the corresponding bottom plate (32) of the precast section, the side wall of the web plate (43) of the splicing section is welded to the corresponding web plate (33) of the precast section, the top of the web plate (43) of the splicing section is welded to the top plate (41) of the splicing section, the bottom of the web plate (43) of the splicing section is welded to the bottom plate (42) of the splicing section, and one end of the stiffening rib (46) of the web plate of the splicing section is welded to one end of the stiffening rib (36) of the web plate of the precast section to form a straight line; Step 3: After hoisting the main beam (1) to the design position at the construction site, weld the cantilever splice section (4) welded in Step 2 onto the main beam (1) to form an arched viewing platform. Step 4: After welding the end cap plate (5) to the end of the main beam (1), the construction of the arch bridge viewing platform is completed.

5. The construction method of an arch bridge viewing platform construction according to claim 4, characterized in that, The specific process of step 3 is as follows: After the main beam (1) is hoisted to the design position at the construction site, the top plate (41), bottom plate (42), and web plate (43) of the splicing section away from the main arch rib (2) are welded to the main beam (1) to form an arch viewing platform. The specific process of step 4 is as follows: Several stiffening ribs (52) of the sealing plate are welded to the sealing plate (51), and the sealing plate (51) is then welded to the end of the main beam (1). The sealing plate (51) is then welded to the top plate (41) of the splicing section, the bottom plate (42) of the splicing section, and the web plate (43) of the splicing section, thus completing the construction of the arch bridge viewing platform.

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