Pedestrian bridge with arched curve plane

Abstract

The utility model relates to a pedestrian bridge with a plane in an arch curve shape. The pedestrian bridge comprises a first fixing table, a second fixing table, a third fixing table, a vertical supporting piece and a bridge floor body. The first fixing table is fixed to one side of a river bank, the second fixing table and the third fixing table are fixed to the other side of the river bank, the second fixing table is located between the first fixing table and the third fixing table, and one end of the vertical supporting piece is fixed to the second fixing table; the bridge floor body is of an arched curve bending structure on the horizontal plane and is of an integrated structure, one end of the bridge floor body is connected with the first fixing table, the other end of the bridge floor body is connected with the third fixing table, and the bridge floor body can horizontally and freely move on the second fixing table through the vertical supporting piece. Compared with the prior art, the integrated horizontal plane arch structure has the advantages of being reasonable and feasible in stress, good in integrity and durability, large in rigidity and the like.

Description

Technical Field

[0001] The utility model relates to the field of bridge structures, in particular to a pedestrian bridge with an arched curve on its plane. Background Art

[0002] The Jiangnan Plain, with its dense network of rivers, often features pedestrian bridges connecting riverside trails or parks. Beam bridges are the most common bridge type due to their high structural rigidity, economical cost, and ease of construction. These bridges require rapid landing after crossing the river to facilitate pedestrian access. When bridges are located on navigable waterways, they must span the navigable waters in a single span, necessitating a relatively large span. Using a beam bridge in this situation presents two problems: first, the high beam height creates a significant difference in height between the bridge deck and the ground, making it difficult for pedestrians to access the bridge; second, using a continuous beam with a structural span increases the distance pedestrians have to travel to access the bridge. Therefore, a rigid frame system with two ends secured to reduce beam height is a reasonable option. However, the effects of temperature, shrinkage, and creep on this structure can generate significant horizontal forces on the piers and foundation, making substructure design particularly challenging for sites with poor foundation conditions.

[0003] To mitigate the adverse effects of temperature, shrinkage, and creep, a common design approach currently involves designing this structure as a cantilever with a hanging hole, or by installing a retractable rigid hinge at the midspan to relieve axial deformation. The former, a common structure used on early bridges, has proven to have low overall structural stiffness during use, with expansion joints at the hanging holes prone to damage and difficult to repair. Furthermore, when located on waterways, the bridge's ability to withstand ship collisions is poor. The latter, a relatively recent development, has limited application. However, both structures share common issues: expansion joints in the main beams offer limited pedestrian comfort, and they are prone to damage and difficult to repair. Furthermore, neither the hanging hole system's supports nor the rigid hinge structure can outlast the bridge structure, making maintenance and replacement extremely difficult. While installing structural joints in rigid-frame bridges can address stress issues, they can also create operational challenges for pedestrian comfort and structural durability.

[0004] To reduce the adverse effects of temperature, shrinkage, and creep caused by the rigid frame system with fixed ends, the commonly used design method is to design the structure as a cantilever with hanging holes, or to install a retractable rigid hinge at the mid-span to release the axial deformation of the structure. However, both of these structures have some problems, as follows:

[0005] ① Both structures have expansion joints in their main beams, which provide average pedestrian comfort. Furthermore, the expansion joints are prone to damage, which is difficult to repair and cure.

[0006] ② The supports and rigid hinge structures of the hanging hole structure cannot have the same lifespan as the main structure of the bridge, making maintenance and replacement extremely difficult;

[0007] ③ The structural system of the cantilever with hanging holes has poor integrity and low rigidity. Especially for long-span pedestrian bridges, rigidity often becomes a limiting factor in the feasibility of the scheme.

[0008] ④ If the cantilever plus hanging hole structure is used in areas across lines or waterways, collisions are likely to occur, resulting in safety accidents such as misalignment of the hanging holes or even falling beams. Many such accidents have occurred in the Jiangsu, Zhejiang and Shanghai regions.

[0009] In summary, in order to reduce the adverse effects of temperature, shrinkage, and creep caused by the rigid structure system with fixed ends, existing pedestrian bridges mostly adopt a cantilever and hanging hole structure system. However, this structure is not comfortable enough, has insufficient strength and service life, is prone to disease, and is difficult to maintain in the later stage. Therefore, there is a need to provide a pedestrian bridge with high strength, comfort and long service life. Utility Model Content

[0010] The purpose of the present utility model is to provide a pedestrian bridge with an arched curve in order to overcome the defects of the above-mentioned prior art, which has a structural system of cantilever and hanging holes, is not comfortable enough, has insufficient strength and service life, is prone to damage, and is difficult to maintain in the later stage.

[0011] The purpose of the utility model can be achieved through the following technical solutions:

[0012] A pedestrian bridge with an arched curve in plane, comprising a first fixed platform, a second fixed platform, a third fixed platform, vertical supports and a bridge deck body;

[0013] The first fixing platform is fixed on one side of the river bank, the second fixing platform and the third fixing platform are fixed on the other side of the river bank, the second fixing platform is located between the first fixing platform and the third fixing platform, and one end of the vertical support member is fixed on the second fixing platform;

[0014] The bridge deck body is an arched curved structure on the horizontal plane and is an integrated structure. One end of the bridge deck body is connected to the first fixed platform, and the other end is connected to the third fixed platform. The bridge deck body can move horizontally freely on the second fixed platform through vertical support members.

[0015] Preferably, the bridge deck body includes a river-crossing section and a bending section, one end of the river-crossing section is connected to the bending section, and the other end is connected to the first fixed platform, and the other end of the bending section is connected to the third fixed platform, and the connection between the river-crossing section and the bending section is located at the upper end of the vertical support member.

[0016] Preferably, the river-crossing section is fixedly connected to the first fixed platform.

[0017] Preferably, the bending section is fixedly connected to the third fixing platform.

[0018] Preferably, the river-crossing section and the bending section are an integrated structure.

[0019] Preferably, the river-crossing section and the bending section are continuous steel box girder structures.

[0020] Preferably, the vertical support member is a bidirectional support.

[0021] Compared with the prior art, the utility model has the following advantages:

[0022] (1) This scheme sets the pedestrian bridge as an integrated structure, and the main bridge deck is a curved structure with an arch curve in the horizontal plane. The two ends of the main bridge deck are fixed by the first fixed platform and the third fixed platform respectively, and a vertical support member is set under the middle section. The vertical support member is fixed by the second fixed platform. The vertical support member supports the middle section of the main bridge deck and only limits the vertical displacement of the main bridge deck. The bridge deck can move horizontally and move and deform within the arch surface of the main bridge deck.

[0023] By designing the pedestrian bridge plane of the consolidation system at both ends into an arched curved structure in the horizontal plane, for the bridge deck body of the multi-span structure, only vertical supports are set at the middle supports, which do not constrain the horizontal deformation of the bridge deck body and only play a supporting role. The arch shape of the bridge plane can move along the vertical supports and deform in the horizontal plane to adapt to temperature, shrinkage and creep deformation, thereby releasing the adverse effects of the consolidation system caused by axial deformation; and the integrated horizontally bent system structure has good integrity and durability and greater rigidity.

[0024] (2) In this scheme, the main body of the bridge deck adopts an integrated structure, that is, a complete and continuous steel box girder structure. The arched structure in the horizontal plane can move horizontally along the bidirectional supports and adaptively deform in the horizontal plane to overcome the naturally generated deformation. Compared with the existing cantilever hanging hole structure, the integrity, durability and rigidity of the structure are improved, and the safety hazards of the middle hanging hole of the conventional consolidated bridge are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of a pedestrian bridge with an arched curve in a plan view provided by the utility model;

[0026] Figure 2 This is a schematic diagram of the main structure of the pedestrian bridge with an arched curve in plane provided by the utility model;

[0027] Figure 3 A cross-sectional view of the pedestrian bridge provided by the present invention at the position of the vertical support member;

[0028] Figure 4A schematic diagram of the fixed connection structure between the bridge deck body and the fixed platform provided by the utility model;

[0029] In the figure: 1. First fixed platform, 2. Second fixed platform, 3. Third fixed platform, 4. Vertical support member, 5. Bridge deck, 6. River bank, 51. River crossing section, 52. Bending section, 53. Branch beam. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0033] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0034] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0035] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0036] Example 1

[0037] like Figure 1 and Figure 2 As shown, this embodiment provides a pedestrian bridge with an arched curve in plane, comprising a first fixed platform 1, a second fixed platform 2, a third fixed platform 3, a vertical support member 4 and a bridge deck body 5;

[0038] The first fixing platform 1 is fixed on one side of the river bank 6, the second fixing platform 2 and the third fixing platform 3 are fixed on the other side of the river bank 6, the second fixing platform 2 is located between the first fixing platform 1 and the third fixing platform 3, and one end of the vertical support member 4 is fixed on the second fixing platform 2;

[0039] The bridge deck body 5 has an arched curved structure on the horizontal plane and is an integrated structure. One end of the bridge deck body 5 is connected to the first fixed platform 1, and the other end is connected to the third fixed platform 3. The bridge deck body 5 can move freely horizontally on the second fixed platform through the vertical support member 4.

[0040] Working principle: The pedestrian bridge is set as an integrated structure, and the bridge deck body 5 is a bent structure with an arch curve in the horizontal plane. The two ends of the bridge deck body 5 are fixed by the first fixed platform 1 and the third fixed platform 3 respectively, and a vertical support member 4 is set under the middle section. The vertical support member 4 is fixed by the second fixed platform 2. The vertical support member 4 supports the middle section of the bridge deck body 5 and only limits the vertical displacement of the bridge deck body 5. The bridge deck can move horizontally and move and deform within the arch surface of the bridge deck body 5.

[0041] By designing the pedestrian bridge plane of the consolidation system at both ends into an arched curved structure in the horizontal plane, for the bridge deck body of the multi-span structure, only vertical supports are set at the middle supports, which do not constrain the horizontal deformation of the bridge deck body and only play a supporting role. The arch shape of the bridge plane can move along the vertical supports and deform in the horizontal plane to adapt to temperature, shrinkage and creep deformation, thereby releasing the adverse effects of the consolidation system caused by axial deformation; and the integrated horizontally bent system structure has good integrity and durability and greater rigidity.

[0042] Specifically, the bridge deck body 5 includes a river-crossing section 51 and a bending section 52. One end of the river-crossing section 51 is connected to the bending section 52, and the other end is connected to the first fixed platform 1. The other end of the bending section 52 is connected to the third fixed platform 3. The connection between the river-crossing section 51 and the bending section 52 is located at the upper end of the vertical support member 4.

[0043] like Figure 4 As shown, the river crossing section 51 is fixedly connected to the first fixed platform 1. The bending section 52 is fixedly connected to the third fixed platform 3. The river crossing section 51 and the bending section 52 are an integrated structure. The river crossing section 51 and the bending section 52 are continuous steel box girder structures.

[0044] The main body of the bridge deck adopts an integrated structure, that is, a complete and continuous steel box girder structure. The arched structure in the horizontal plane can move horizontally along the bidirectional supports and adaptively deform in the horizontal plane to overcome naturally occurring deformations. Compared with the existing cantilever hanging hole structure, it improves the integrity, durability and rigidity of the structure, and solves the safety hazards of the middle hanging holes in conventional consolidated bridges.

[0045] Among them, Figure 3 As shown, the vertical support member 4 is a bidirectional bearing. The bidirectional bearing limits the vertical displacement of the bridge deck 5 while ensuring that the bridge deck 5 can move and deform in the horizontal plane, adapting to the influence of existing environmental factors, and ensuring the stability and safety of the connection between the vertical support member and the bridge deck 5.

[0046] Specifically, the bridge deck body 5 is an arched structure in the vertical plane, that is, the bridge deck body 5 maintains a certain distance from the river surface, which facilitates the normal passage of ships in the river.

[0047] Alternatively, as Figure 1 As shown, a branch beam 53 is provided on one side of the bridge deck body 5 , one end of the branch beam 53 is fixed on one side of the bridge deck body 5 , and the other end is fixed on the ground.

[0048] According to the functional requirements of the pedestrian bridge, a branch beam 53 can be set on one side of the bridge deck body 5. The branch beam 53 is far away from the second fixed platform 3 and will not affect the horizontal movement of the bridge deck body 5.

[0049] Specifically, a complete and continuous steel box girder is used to span the navigable river channel. The steel box girders at the first and third fixed platforms 1 and 3 on both sides are cast together with the abutment concrete through a steel-concrete joint section. Prestressing, PBL keys and other measures are used to ensure a reliable connection between the steel box girder and the concrete foundation, thus forming a consolidated end. A bidirectional support that only provides vertical support is set on the top of the second fixed platform 2 in the middle and connected to the steel box girder; the bridge plane adopts an arched curve shape, thus forming a plane arched two-end consolidation system. The pedestrian bridge is arranged according to the actual crossing requirements of the river channel. The curvature of the pedestrian bridge's plane curve can be adjusted according to the actual terrain and aesthetic requirements. In order to meet functional requirements, a bifurcated beam can be added on one side of the bridge deck body 5, and it will not affect the formation of the structural system of this example.

[0050] This pedestrian bridge structural system significantly reduces the adverse effects of temperature, shrinkage, and creep on bridges with fixed ends, while also improving the structural integrity, durability, and rigidity, and resolving the safety hazards associated with central hanging holes in conventional fixed bridges. However, this system is suitable for pedestrian bridges rather than vehicular bridges, primarily because vehicular bridges are subject to greater planar constraints, while pedestrian bridges offer greater freedom in planar layout and, with appropriate application of planar alignment, can achieve a better landscape effect.

[0051] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art based on the concepts of the present invention through logical analysis, reasoning, or limited experimentation based on the existing technology should be within the scope of protection defined by the claims.

Claims

1. A pedestrian bridge with an arched curve in plane, characterized in that: It comprises a first fixing platform (1), a second fixing platform (2), a third fixing platform (3), a vertical support member (4) and a bridge deck body (5); The first fixing platform (1) is fixed on one side of the river bank (6), the second fixing platform (2) and the third fixing platform (3) are fixed on the other side of the river bank (6), the second fixing platform (2) is located between the first fixing platform (1) and the third fixing platform (3), and one end of the vertical support member (4) is fixed on the second fixing platform (2); The bridge deck body (5) is a bent structure with an arched curve on a horizontal plane and is an integrated structure. One end of the bridge deck body (5) is connected to a first fixed platform (1), and the other end is connected to a third fixed platform (3). The bridge deck body (5) can be horizontally moved to connect to a vertical support member (4).

2. The pedestrian bridge with an arched curve in plane according to claim 1, characterized in that: The bridge deck body (5) comprises a river-crossing section (51) and a bending section (52); one end of the river-crossing section (51) is connected to the bending section (52), and the other end is connected to the first fixed platform (1); the other end of the bending section (52) is connected to the third fixed platform (3); and the connection point between the river-crossing section (51) and the bending section (52) is located at the upper end of the vertical support member (4).

3. The pedestrian bridge with an arched curve in plane according to claim 2, characterized in that: The river-crossing section (51) is fixedly connected to the first fixed platform (1).

4. The pedestrian bridge with an arched curve in plane according to claim 2, characterized in that: The bending section (52) is fixedly connected to the third fixing platform (3).

5. The pedestrian bridge with an arched curve in plane according to claim 2, characterized in that: The river-crossing section (51) and the bending section (52) are an integrated structure.

6. The pedestrian bridge with an arched curve in plane according to claim 5, characterized in that: The river-crossing section (51) and the bending section (52) are continuous steel box girder structures.

7. The pedestrian bridge with an arched curve in plane according to claim 1, characterized in that: The vertical support member (4) is a bidirectional support.

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