A ladder structure for bridges with large height differences

Abstract

The present invention provides a ladder structure for a bridge with a large height difference, and relates to the field of bridge engineering. The ladder structure for a bridge with a large height difference includes a foundation system, a frame system, a step system, and a protective system. The frame system is connected to the top of the foundation system. The frame system is composed of supporting columns, truss ladder beams, platform cantilever beams, crossbeams, and node modules. The truss ladder beams are steel structures, with three beams arranged in parallel, forming an integrated frame system in a triangular truss system arrangement. The present invention uses a split connection of the foundation system, the frame system, the step system, and the protective system, and fixes them after being transported to the bridge with a large height difference, thereby improving convenience and integrity. In addition, it is more beautiful and highly functional.

Description

Technical Field

[0001] The present invention relates to the field of bridge ladder engineering, in particular to a ladder structure for bridges with large height differences. Background Art

[0002] Large river-crossing bridges, constrained by boundary conditions such as navigation and flood control, often require a significant height difference between the bridge deck and riverside roads. Traditional river-crossing bridge designs primarily prioritize vehicular traffic, neglecting pedestrian access. The lack of access stairs forces pedestrians to travel long distances, creating significant inconvenience. To improve the user-friendliness of bridges, newly constructed bridges often incorporate access stairs at the bridgeheads, and existing bridges also require additional access stairs.

[0003] Traditional bridge stairways primarily utilize straight or spiral stairways. Straight stairways are long, occupy a large area, and have a high number of piers. This increases the potential for conflict with underground structures and pipelines, resulting in insufficient structural integrity and relatively poor economic and aesthetic appeal. Spiral stairways, while occupying a relatively small area, have a relatively low traffic volume, and the spiraling path can easily cause dizziness for pedestrians, making them less comfortable to use. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the present invention provides a staircase structure for bridges with large height differences, which solves the problems in the existing technology that straight staircases occupy a large area, have poor economy and landscape, and that spiral staircases have relatively small traffic volume and that the spiral ascent can easily cause pedestrians to feel dizzy.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a ladder structure for a bridge with a large height difference, comprising a foundation system, a frame system, a step system and a protection system, wherein the frame system is connected to the top of the foundation system;

[0008] The frame system is composed of supporting columns, truss ladder beams, platform cantilever beams, cross beams and node modules, and the node modules are composed of node blocks and connecting blocks fixedly welded into one body, and the connecting block is a cross-shaped structure including four connecting heads, and the node block is a Y-shaped structure consisting of two connecting ends and a base end, and the base end of the node block is welded and fixed to one of the connecting heads of the connecting block, and the two connecting ends corresponding to the truss ladder beam and the node block are welded into a triangular truss and three frames are arranged in parallel, and supporting columns are welded between the connecting heads connected by the upper and lower distributed connecting blocks corresponding to the two outer triangular trusses, and the node blocks and connecting blocks at the same height of the three triangular trusses are fixedly welded with a cross beam, and a platform cantilever beam is welded together at the connecting blocks at both ends of the cross beam away from the other side of the node block, and the platform cantilever beam is located at each node block corresponding to the triangular truss to form a spatial multi-layer structure;

[0009] The step system includes a step stairway and a turning viewing platform, the step stairway includes a pedestrian tread plate, and the turning viewing platform includes a platform plate. The pedestrian tread plate is transversely fixedly connected between the truss stairway beams on both sides, and the platform plate is welded to the platform cantilever beam and cross beam. The top surface of the pedestrian tread plate is lower than the top surface of the truss stairway beams on both sides, and the top surface of the platform plate is lower than the top surface of the platform cantilever beam;

[0010] The protection system includes railing columns and advertising columns. The advertising columns are arranged in the gap in the middle of the triangular truss. The upper and lower ends of the advertising columns are fixedly connected to the outermost truss ladder beams in the upper and lower directions. The bottom of the railing columns is welded to the top surface of the outer part of the truss ladder beam and the platform cantilever beam.

[0011] Preferably, the platform cantilever beam is in an E-shaped structure, and the end of the platform cantilever beam is welded to the cross beam and two connecting blocks in a Japanese shape.

[0012] Preferably, the step staircase includes pedestrian treads and non-motor vehicle pushing ramps, and the non-motor vehicle pushing ramps are welded and fixed above the pedestrian treads.

[0013] Preferably, the platform plate is fixed above the middle beam of the cross beam and the platform cantilever beam, and the bottom surface of the platform plate includes fixedly welded platform plate stiffening ribs, which are arranged parallel to the pedestrian treads and have both ends welded to the side walls of the platform cantilever beam.

[0014] Preferably, the advertising column is fixed on a side of the railing column facing the pedestrian tread.

[0015] Preferably, the foundation system includes pile foundations, tie beams and column base anchoring systems, the pile foundations are arranged in groups of four in a rectangular shape, and adjacent pile foundations are fixedly connected as a whole by tie beams and are all made of reinforced concrete.

[0016] Preferably, the column base anchoring system includes a column base anchor bolt and a positioning steel plate. The column base anchor bolt is L-shaped, and the horizontal portion is pre-buried inside the pile foundation and positioned by the positioning steel plate.

[0017] Preferably, there are two positioning steel plates, the positioning steel plate located on the lower side is pre-embedded in the pile foundation and is connected and fixed to the four connecting blocks distributed in a rectangular shape on the lower side through the supporting column, the positioning steel plate located on the upper side is distributed on the upper side of the pile foundation, the column foot anchor bolts pass through the lower side wall of the supporting column and are connected to the upper side of the lower side wall of the supporting column with high-strength bolts, and the outer side of the positioning steel plate on the upper side and the lower end of the supporting column are provided with epoxy mortar for sealing.

[0018] Preferably, the protection system further comprises a railing handrail, which is fixedly connected to the top of the railing column and has a lighting assembly installed on the inner side.

[0019] Preferably, the three uppermost parallel truss ladder beams are welded to the two uppermost connecting blocks and the cross beams between the connecting blocks.

[0020] (3) Beneficial effects

[0021] The present invention provides a ladder structure for a bridge with a large height difference, which has the following beneficial effects:

[0022] 1. The present invention has a reasonable structural force and strong integrity. The truss ladder beams serve as diagonal braces, and the supporting columns provide vertical support. The truss ladder beams, supporting columns, and cross beams are connected with node modules to form a spatial system. The overall lateral stiffness is large, the stability is good, and the seismic performance is excellent.

[0023] 2. This invention allows for prefabricated construction, speeding up on-site construction. Key components, including support columns, truss stairway beams, platform boom beams, crossbeams, and pedestrian treads, can be modularized and mass-produced. Its steel structure facilitates processing, manufacturing, transportation, and on-site connection, contributing to a higher degree of prefabrication. Furthermore, it offers a more aesthetically pleasing and functional design, and its foundation system reduces floor space, giving it a significant market advantage over existing straight and spiral stairways. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a front view of the present invention;

[0026] Figure 3 is a schematic diagram of the basic system of the present invention;

[0027] Figure 4 This is a connection diagram of the column foot anchoring system of the present invention;

[0028] Figure 5 It is a structural diagram of the frame system in the present invention;

[0029] Figure 6 Schematic diagram of the structure of the stairway in the present invention;

[0030] Figure 7 Schematic diagram of the structure of the platform plate in the present invention;

[0031] Figure 8 Schematic diagram of the connection between the railing post and the railing handrail in the present invention;

[0032] Figure 9 This is a schematic diagram of the connection between the truss ladder beam located in the middle position and the advertising column in the present invention;

[0033] Figure 10 It is a structural diagram of the node module in the present invention.

[0034] Among them, 1. Foundation system; 2. Frame system; 3. Step system; 4. Protection system; 1-1. Pile foundation; 1-2. Tie beam; 1-3. Column foot anchoring system; 2-1. Support column; 2-2. Truss ladder beam; 2-3. Platform cantilever beam; 2-4. Crossbeam; 2-5. Node module; 3-1. Pedestrian tread; 3-2. Non-motor vehicle ramp; 3-3. Platform plate; 3-4. Platform plate stiffening rib; 4-1. Railing column; 4-2. Railing handrail; 4-3. Advertising column; 1-3-1. High-strength bolt; 1-3-2. Column foot anchor bolt; 1-3-3. Epoxy mortar; 1-3-4. Positioning steel plate; 2-5-1. Node block; 2-5-2. Connection block. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] Example:

[0037] like Figure 1-10 As shown, an embodiment of the present invention provides a ladder structure for a bridge with a large height difference, comprising a foundation system 1, a frame system 2, a step system 3 and a protection system 4. The frame system 2 is connected to the top of the foundation system 1. Both the frame system 2 and the step system 3 are steel structures.

[0038] The frame system 2 is composed of a supporting column 2-1, a truss ladder beam 2-2, a platform cantilever beam 2-3, a cross beam 2-4 and a node module 2-5. The node module 2-5 is composed of a node block 2-5-1 and a connecting block 2-5-2 fixedly welded into one body. The connecting block 2-5-2 is a cross-shaped structure including four connecting heads. The node block 2-5-1 is a Y-shaped structure consisting of two connecting ends and a base end. The node block 2-5-1 has an arc transition between the two connecting ends. The base end of the node block 2-5-1 is welded and fixed to one of the connecting heads of the connecting block 2-5-2. The two corresponding connecting ends of the truss ladder beam 2-2 and the node block 2-5-1 are welded into a triangular truss and three frames are arranged in parallel. The supporting columns 2-1 are welded between the connecting heads of the upper and lower connecting blocks 2-5-2 corresponding to the two outer triangular trusses. The supporting columns 2-1 are subjected to vertical force. According to the height difference of the bridge, the number and length of the supporting columns 2-1 are modularly adjusted. A crossbeam 2-4 is fixedly welded at the connection head of the node blocks 2-5-1 and the connecting blocks 2-5-2 at the same height of the three triangular trusses, which are away from the node blocks 2-5-1 on the side. A platform cantilever beam 2-3 is welded to the connecting blocks 2-5-2 at both ends on the other side of the crossbeam 2-4 away from the node blocks 2-5-1. The platform cantilever beam 2-3 is in an E-shaped structure. The beam height of the platform cantilever beam 2-3 gradually changes from the connection to the cantilever end. The end of the platform cantilever beam 2-3 is welded to the crossbeam 2-4 and the two connecting blocks 2-5-2 in a sun shape. The platform cantilever beam 2-3 is located at each node block 2-5-1 corresponding to the triangular truss to form a spatial multi-layer structure. The three parallel truss ladder beams 2-2 on the uppermost side are welded to the two connecting blocks 2-5-2 on the uppermost side and the crossbeam 2-4 between the connecting blocks 2-5-2.

[0039] The step system 3 includes a step stairway and a turning viewing platform. The step stairway includes a pedestrian tread 3-1, and the turning viewing platform includes a platform board 3-3. The pedestrian tread 3-1 is laterally fixedly connected between the truss stairway beams 2-2 on both sides. The platform board 3-3 is welded to the platform cantilever beam 2-3 and the cross beam 2-4. The top surface of the pedestrian tread 3-1 is lower than the top surface of the truss stairway beams 2-2 on both sides. The pedestrian tread 3-1 is supported by the truss stairway beams 2-2, making the step system 3 light and stable. The top surface of 3-3 is lower than the top surface of the platform cantilever beam 2-3. The viewing platform is used for viewing and resting, and an awning can also be placed. The staircase includes a pedestrian tread 3-1 and a non-motor vehicle pushing ramp 3-2. The non-motor vehicle pushing ramp 3-2 is welded and fixed above the pedestrian tread 3-1. The upper side of the non-motor vehicle pushing ramp 3-2 includes an anti-slip groove for increasing the resistance to ascending and descending. The pedestrian tread 3-1, the platform plate 3-3, and the non-motor vehicle pushing ramp 3-2 are all rolled.

[0040] The protection system 4 includes a railing column 4-1 and an advertising column 4-3. The advertising column 4-3 is arranged in the gap in the middle of the triangular truss. The upper and lower ends of the advertising column 4-3 are fixedly connected to the outermost truss ladder beams 2-2 in the upper and lower directions. The bottom of the railing column 4-1 is welded to the top surface of the outer part of the truss ladder beam 2-2 and the platform cantilever beam 2-3. The railing columns 4-1 are distributed vertically and equidistantly. Advertising posters can be posted on the advertising column 4-3.

[0041] The platform plate 3-3 is fixed above the middle beam of the cross beam 2-4 and the platform cantilever beam 2-3. The bottom surface of the platform plate 3-3 includes fixedly welded platform plate stiffening ribs 3-4. The platform plate stiffening ribs 3-4 are arranged parallel to the pedestrian tread 3-1 and the two ends are welded to the side walls of the platform cantilever beam 2-3.

[0042] The advertising column 4-3 can also be fixed on the side of the railing column 4-1 facing the pedestrian tread 3-1.

[0043] The foundation system 1 includes pile foundations 1-1, tie beams 1-2 and column base anchoring systems 1-3. The pile foundations 1-1 are arranged in a rectangular pattern of four and adjacent pile foundations are fixedly connected as a whole by tie beams 1-2. They are all made of reinforced concrete, which improves the stability of the connection between the pile foundations 1-1 and the tie beams 1-2. The pile foundations 1-1 are used to support the upper load. By reducing the number of pile foundations 1-1, the overall permeability of the lower side is improved.

[0044] The column base anchoring system 1-3 includes a column base anchor bolt 1-3-2 and a positioning steel plate 1-3-4. The column base anchor bolt 1-3-2 is L-shaped and its horizontal part is pre-buried inside the pile foundation 1-1 and positioned by the positioning steel plate 1-3-4. The horizontal part of the column base anchor bolt 1-3-2 is away from the center position of the pile foundation 1-1.

[0045] There are two positioning steel plates 1-3-4. The positioning steel plate 1-3-4 on the lower side is pre-embedded in the pile foundation 1-1 and is connected and fixed to the four connecting blocks 2-5-2 distributed in a rectangular shape on the lower side through the supporting column 2-1. The positioning steel plates 1-3-4 on the upper side are distributed on the upper side of the pile foundation 1-1. The column foot anchor bolts 1-3-2 pass through the lower side wall of the supporting column 2-1 and are connected to the high-strength bolts 1-3-1 on the upper side of the lower side wall of the supporting column 2-1. The outer side of the upper positioning steel plate 1-3-4 and the lower end of the supporting column 2-1 is provided with epoxy mortar 1-3-3 for sealing. The epoxy mortar 1-3-3 is used to prevent water accumulation and rust at the column foot anchoring system 1-3.

[0046] The protection system 4 also includes a railing handrail 4-2, which is fixedly connected to the top of the railing column 4-1 and has a lighting component installed on the inside to meet the lighting function.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A ladder structure for a bridge with a large height difference, characterized by: It comprises a foundation system (1), a frame system (2), a stepping system (3) and a protection system (4), wherein the frame system (2) is connected to the top of the foundation system (1); The frame system (2) is composed of supporting columns (2-1), truss ladder beams (2-2), platform cantilever beams (2-3), cross beams (2-4) and node modules (2-5). The node modules (2-5) are composed of node blocks (2-5-1) and connecting blocks (2-5-2) fixedly welded into one body. The connecting block (2-5-2) is a cross-shaped structure including four connecting heads. The node block (2-5-1) is a Y-shaped structure consisting of two connecting ends and a base end. The base end of the node block (2-5-1) is welded and fixed to one of the connecting heads of the connecting block (2-5-2). The truss ladder beams (2-2) and the node blocks (2-5- 1) The corresponding two connection ends are welded into a triangular truss and three trusses are arranged in parallel. Support columns (2-1) are welded between the connection heads connected by the upper and lower connection blocks (2-5-2) corresponding to the two outer triangular trusses. A crossbeam (2-4) is fixedly welded between the node blocks (2-5-1) and the connection blocks (2-5-2) at the same height of the three triangular trusses. A platform cantilever beam (2-3) is welded to the other side of the crossbeam (2-4) away from the node block (2-5-1) and the connection blocks (2-5-2) at both ends. The platform cantilever beam (2-3) is located at each node block (2-5-1) corresponding to the triangular truss to form a spatial multi-layer structure. The step system (3) comprises a step stairway and a turning viewing platform, the step stairway comprises a pedestrian stepping plate (3-1), the turning viewing platform comprises a platform plate (3-3), the pedestrian stepping plate (3-1) is transversely fixedly connected between the truss stairway beams (2-2) on both sides, the platform plate (3-3) is welded to the platform cantilever beam (2-3) and the crossbeam (2-4), the top surface of the pedestrian stepping plate (3-1) is lower than the top surface of the truss stairway beams (2-2) on both sides, and the top surface of the platform plate (3-3) is lower than the top surface of the platform cantilever beam (2-3); The protection system (4) includes a railing column (4-1) and an advertising column (4-3). The advertising column (4-3) is arranged in the gap in the middle of the triangular truss. The upper and lower ends of the advertising column (4-3) are fixedly connected to the outermost truss ladder beams (2-2) in the upper and lower directions. The bottom of the railing column (4-1) is welded to the top surface of the outer part of the truss ladder beam (2-2) and the platform cantilever beam (2-3). The platform plate (3-3) is fixed above the middle beam of the cross beam (2-4) and the platform cantilever beam (2-3); the bottom surface of the platform plate (3-3) includes fixedly welded platform plate stiffening ribs (3-4); the platform plate stiffening ribs (3-4) are arranged parallel to the pedestrian treads (3-1) and have both ends welded to the side walls of the platform cantilever beam (2-3); The protection system (4) further includes a railing handrail (4-2), which is fixedly connected to the top end of the railing column (4-1), and a lighting component is installed inside.

2. The ladder structure for a bridge with a large height difference according to claim 1, characterized in that: The platform cantilever beam (2-3) is in an E-shaped structure, and the end of the platform cantilever beam (2-3) is welded to the cross beam (2-4) and two connecting blocks (2-5-2) to form a square shape.

3. The ladder structure for a bridge with a large height difference according to claim 1, characterized in that: The step staircase includes a pedestrian step board (3-1) and a non-motor vehicle pushing ramp board (3-2), and the non-motor vehicle pushing ramp board (3-2) is fixedly welded above the pedestrian step board (3-1).

4. The ladder structure for a bridge with a large height difference according to claim 1, characterized in that: The advertisement board (4-3) is fixed on one side of the railing column (4-1) facing the pedestrian step board (3-1).

5. The ladder structure for a bridge with a large height difference according to claim 1, characterized in that: The foundation system (1) includes pile foundations (1-1), tie beams (1-2) and column base anchorage systems (1-3). Four pile foundations (1-1) are arranged in a rectangle, and adjacent pile foundations are fixedly connected into a whole by tie beams (1-2) and are all made of reinforced concrete.

6. The ladder structure for a bridge with a large height difference according to claim 5, characterized in that: The column base anchorage system (1-3) includes column base anchor bolts (1-3-2) and positioning steel plates (1-3-4). The column base anchor bolts (1-3-2) are in an L shape, and the horizontal part is embedded in the interior of the pile foundation (1-1) and is positioned by the positioning steel plate (1-3-4).

7. The ladder structure for a bridge with a large height difference according to claim 6, characterized in that: The number of the positioning steel plates (1-3-4) is two. The positioning steel plate (1-3-4) located at the lower side is embedded in the pile foundation (1-1) and is fixedly connected to the four connecting blocks (2-5-2) distributed in a rectangle at the lowermost side through a support column (2-1). The positioning steel plate (1-3-4) located at the upper side is distributed on the upper surface of the pile foundation (1-1). The column base anchor bolt (1-3-2) passes through the lower side wall of the support column (2-1) and a high-strength bolt (1-3-1) is connected to the upper side of the lower side wall of the support column (2-1). Epoxy mortar (1-3-3) for sealing is arranged on the outer side at the lower end of the support column (2-1) and the upper side positioning steel plate (1-3-4).

8. The ladder structure for a bridge with a large height difference according to claim 1, characterized in that: The three parallel truss staircase beams (2-2) at the uppermost side are welded to the two connecting blocks (2-5-2) at the uppermost side and the cross beam (2-4) between the connecting blocks (2-5-2).

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