CN220724825U - Assembled string bridge structure - Google Patents

Abstract

The utility model relates to the field of building technology, and specifically discloses an assembled beam-string bridge structure, including: two side pier cap beams, the two side pier cap beams are arranged opposite to each other; at least two main cables, the two ends of each main cable are respectively connected to the two side pier cap beams to form an arc structure with an opening facing upward, a first retractable limit rod is connected between two adjacent main cables, and each main cable forms a curve with a concave surface facing outward on a plane; a prefabricated bridge deck structure, the prefabricated bridge deck structure is horizontally arranged between the two side pier cap beams, and a steel cap beam is arranged at the bottom of the prefabricated bridge deck structure; and a plurality of retractable diagonal braces, the plurality of retractable diagonal braces are arranged in a zigzag shape between the main cables and the prefabricated bridge deck structure, one end of the retractable diagonal brace is connected to the end of the first retractable limit rod, and the other end is connected to the steel cap beam. The utility model can effectively solve the problem of low vertical stiffness of the bridge, and can effectively improve the stability of the assembled beam-string bridge structure.

Description

A prefabricated beam string bridge structure

Technical Field

The utility model relates to the technical field of construction, in particular to an assembled beam-string bridge structure.

Background technique

The beam string structure is a hybrid structural system formed by a rigid upper chord, flexible cables, and a middle connecting rod. Its structural composition is a new type of self-balancing system and a large-span prestressed spatial structural system. The beam string structure is simple, has clear force, and a variety of structural forms. It gives full play to the advantages of both rigid and flexible materials. It is also simple and convenient to manufacture, transport, and construct, and has good application prospects.

The beam string structure is generally used in roof structures. As shown in FIG1 , the roof structure 3 ′ is arranged between two supporting points 1 ′, the flexible cable 2 ′ is connected between the two supporting points 1 ′ and is placed below the roof structure 3 ′, and the roof structure 3 ′ and the flexible cable 2 ′ are connected with a vertical strut 4 ′ to form a beam string roof structure system. The roof load of this structure system is small, and the requirement for the overall stiffness of the structure is relatively small, so the beam string structure is widely used in roofs. There is another type of beam-string bridge, which has a structure similar to the beam-string roof structure, as shown in Figure 2-3. The main beam 5' replaces the roof structure 3', and the main beam 5' and the flexible cable 2' are still connected by vertical struts 4'. Since the bridge's own weight and live load are relatively large, high requirements are placed on the structural stiffness and stability; therefore, the beam-string structure can often only be used for pedestrian bridges with small spans. When used for bridges with large spans, its structural stiffness is small and its lateral stability is poor. In the middle and late stages of operation, the bridge deck is prone to significant vertical deformation, affecting the passage of vehicles. In addition, high requirements are placed on the bearing capacity of temporary anchors during construction, and the construction conditions and costs are high. This leads to the beam-string structure being less used in the bridge field.

Utility Model Content

The technical problem to be solved by the utility model is: how to solve the technical problem that the existing beam string structure has low rigidity and poor stability.

In order to solve the above technical problems, the utility model provides an assembled beam string bridge structure, comprising:

Two side pier cap beams, the two side pier cap beams are arranged opposite to each other;

At least two main cables, each of which has two ends connected to the two side pier cap beams to form an arc-shaped structure with an opening facing upward on a vertical plane, a first retractable limit rod connected between two adjacent main cables, and each main cable forms a curve with a concave surface facing outward on a plane, so that the distance between the middle parts of the two adjacent main cables is smaller than the distance between the two ends, and the length of the first retractable limit rod in the middle part is smaller than the length of the first retractable limit rod at the two ends;

A prefabricated bridge deck structure, wherein the prefabricated bridge deck structure is horizontally arranged between the two side pier cap beams, and a steel cap beam is arranged at the bottom of the prefabricated bridge deck structure; and

A plurality of retractable diagonal bracing rods, wherein the plurality of retractable diagonal bracing rods are arranged in a zigzag shape between the main cable and the prefabricated bridge deck structure, one end of the retractable diagonal bracing rod is connected to the end of the first retractable limit rod, and the other end is connected to the steel cap beam;

Among them, the relative retractable diagonal struts, the first retractable limiting rods and the prefabricated bridge deck structure together form a first area, and a cross-arranged first limiting cable is provided in the first area, one end of the first limiting cable is connected to the main cable, and the other end is connected to the end of the retractable diagonal strut away from the main cable.

Further preferably, the prefabricated bridge deck structure is paved with a plurality of prefabricated panels, a wet joint is reserved between two adjacent prefabricated panels, and the wet joint is arranged corresponding to the steel cap beam.

Further preferably, the two retractable diagonal braces connected to the same steel cap beam and the main cable together form a triangular area; or

The two telescopic diagonal bracing rods connected to the same first telescopic limiting rod and the steel cap beam together form a triangular area.

More preferably, it also includes:

Two ground anchors are provided on both sides of the two side pier cap beams respectively;

a tower column, which is disposed between the ground anchor and the side pier cap beam, wherein the height of the tower column is greater than the height of the ground anchor and the side pier cap beam; and

An auxiliary cable is connected between the ground anchor and the main cable, and the auxiliary cable passes through the highest point of the tower column.

Further preferably, it also includes a position limiting auxiliary component, which is arranged below the prefabricated bridge deck structure and installed between two adjacent steel cap beams.

Further preferably, the limiting auxiliary component includes a second retractable limiting rod, and the second retractable limiting rod is symmetrically arranged between two adjacent steel cap beams, and the steel cap beams and the second retractable limiting rod together form a second area.

Further preferably, the position limiting auxiliary component further includes a second position limiting cable, and the second position limiting cable is cross-arranged in the second area.

Further preferably, a butt plate is laid between two adjacent main cables.

Compared with the prior art, the assembled beam string bridge structure provided by the utility model has the following beneficial effects:

The utility model adopts a retractable diagonal brace to replace the existing vertical brace, which can effectively solve the problem of low vertical stiffness of the bridge. At the same time, when the bridge deck undergoes obvious vertical deformation in the middle and late stages of operation, the adjustability of the retractable diagonal brace is utilized to restore the flatness of the bridge deck by adjusting the length of the retractable diagonal brace; the retractable diagonal brace is arranged in a zigzag shape between the main cable and the prefabricated bridge deck structure, and a first retractable limit rod is connected between two adjacent main cables, and each main cable forms a curve with a concave surface facing outward on the plane, so that the distance between the middle parts of the two adjacent main cables is smaller than the distance between the two ends, and the length of the first retractable limit rod in the middle part is smaller than the length of the first retractable limit rod at the two ends; the relative retractable diagonal brace, the first retractable limit rod and the prefabricated bridge deck structure together enclose a first area, and a cross-arranged first limit cable is arranged in the first area, one end of the first limit cable is connected to the main cable, and the other end is connected to the end of the retractable diagonal brace away from the main cable, thereby effectively improving the overall lateral stability of the assembled tension-string beam bridge structure.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an elevation view of an existing beam-string roof structure.

FIG. 2 is an elevation view of an existing beam string bridge.

FIG. 3 is a bottom plan view of an existing beam string bridge.

FIG. 4 is an elevation view of an assembled beam-string bridge structure according to the present invention.

FIG. 5 is a plan view of the prefabricated bridge deck structure of the present invention.

FIG. 6 is a plan view of the position limiting auxiliary assembly of the present invention.

FIG. 7 is a plan view of the main cable arrangement of the utility model.

FIG8 is a cross-sectional view of an assembled beam-string bridge structure according to the present invention.

FIG. 9 is a schematic structural diagram of another embodiment of an assembled beam-string bridge structure according to the present invention.

In the figure:

1. Side pier cap beam;

2. Main cable;

3. A first retractable limiting rod;

4. Retractable diagonal brace;

5. Steel cap beam;

6. Prefabricated bridge deck structure;

7. Wet seams;

8. Limit auxiliary assembly; 81. Second retractable limit rod; 82. Second limit cable;

9. Planking;

10. The first limit cable;

11. Ground anchor;

12. Tower column;

13. Auxiliary cable.

Detailed ways

The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", "between", "close to", "far away", "one end", "the other end", "horizontal", "vertical", "horizontal", etc. used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and 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, and therefore cannot be understood as a limitation on the present invention.

The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

As shown in FIG. 4 , this embodiment provides a prefabricated beam-string bridge structure, including a side pier cap beam 1, a main cable 2, a prefabricated bridge deck structure 6 and a retractable diagonal brace 4, wherein the side pier cap beams 1 are two and are arranged opposite to each other.

In the specific example, there are at least two main cables 2, and both ends of each main cable 2 are respectively connected to two side pier cap beams 1 to form an arc structure with an opening facing upward, and a first retractable limit rod 3 is connected between two adjacent main cables 2.

It should be noted that the above “at least two” means that the number is greater than or equal to two, that is, it can be two, three, four... and so on. In this example, the number of main cables 2 is preferably two.

In the specific example, the prefabricated bridge deck structure 6 is horizontally arranged between the two side pier cap beams 1. In order to facilitate the connection of the retractable diagonal brace 4, a steel cap beam 5 is required to be provided at the bottom of the prefabricated bridge deck structure 6; the retractable diagonal brace 4 is arranged between the main cable 2 and the prefabricated bridge deck structure 6, one end of the retractable diagonal brace 4 is connected to the end of the first retractable limit rod 3, and the other end is connected to the steel cap beam 5. The retractable diagonal brace 4 is used to replace the existing vertical brace. When the bridge deck undergoes obvious vertical irregular deformation in the middle and late stages of operation, the adjustability of the retractable diagonal brace 4 can be utilized to restore the flatness of the bridge deck by adjusting the length of the retractable diagonal brace 4.

In a specific implementation, in order to improve the lateral stability of the bridge, the main cables 2 are arranged on a plane as a curve with a concave surface facing outward, as shown in FIG7 , that is, the distance between the middle parts of two adjacent main cables 2 is smaller than the distance between the two ends, and the distance between the two adjacent main cables 2 gradually increases from the middle to the two ends; correspondingly, the length of the first retractable limit rod 3 in the middle part is smaller than the length of the first retractable limit rod 3 at the two ends; it should be noted that the distance between the two adjacent main cables 2 can be adjusted by the first retractable limit rod 3, and the construction difficulty is low and the operation is simple.

Referring to Figure 5, in some examples, in order to facilitate the laying construction of the prefabricated bridge deck structure 6, the prefabricated bridge deck structure 6 should be laid out by multiple prefabricated panels. Specifically, each prefabricated panel in the middle part is laid between two adjacent steel cap beams 5, and the prefabricated panels at the end are laid between the steel cap beam 5 and the side pier cap beam 1; in order to ensure the firmness of the prefabricated bridge deck structure 6 after laying, the wet joint 7 between two adjacent prefabricated panels should be firmly connected to the steel cap beam 5.

Preferably, the wet joint 7 is arranged corresponding to the steel cap beam 5 to facilitate the subsequent splicing process. The reserved wet joint 7 can enhance the integrity of the bridge deck structure.

In addition, a wet joint 7 should also be reserved between the prefabricated panel and the edge pier cap beam 1.

In some examples, as shown in FIG. 4 , two retractable diagonal braces 4 connected to the same steel cap beam 5 and the main cable 2 together form a triangular area, or two retractable diagonal braces 4 connected to the same first retractable limiting rod 3 and the steel cap beam 5 together form a triangular area, so that the multiple retractable diagonal braces 4 can form a serrated structure, thereby improving the stability of the prefabricated tension-beam bridge structure and solving the problem of low vertical stiffness of the bridge.

In the above embodiment, in order to further improve the lateral stiffness and lateral stability, a first limiting cable 10 is further arranged between the two opposite retractable diagonal struts 4; specifically, please refer to Figure 8, the opposite retractable diagonal struts 4, the first retractable limiting rod 3 and the prefabricated bridge deck structure 6 together form a first area, and the first limiting cable 10 is cross-arranged in the first area, wherein one end of the first limiting cable 10 is connected to the main cable 2, so that the two opposite retractable diagonal struts 4 can form a more stable triangular structure, which can further improve the lateral stiffness and lateral stability of the prefabricated tension beam bridge structure, and the other end is connected to the end of the retractable diagonal strut 4 away from the main cable 2.

It should be noted here that, in the above example, since the two ends of each main cable 2 are respectively connected to the two side pier cap beams 1 to form an arc-shaped structure with an opening facing upward, the shape of the triangular area can be adjusted by adjusting the length of the retractable diagonal support rod 4, which is more convenient in construction and assembly.

It should be noted that the first area may be a rectangular structure or an inverted trapezoidal structure.

In some embodiments, during the construction of the bridge, before the prefabricated bridge deck structure 6 is completed, the beam-string structure cannot form a self-balancing system and needs to use a temporary anchor to balance the beam-string tension through the main cable 2. The heavier the prefabricated bridge deck structure 6, the larger the tonnage of the temporary anchor. The temporary anchor is a permanent structure and cannot be recycled. Therefore, in order to reduce the tonnage of the temporary anchor, improve construction efficiency, and reduce project investment, a limit auxiliary component 8 can be provided to assist in assembly. As shown in Figures 4, 6 and 8, the limit auxiliary component 8 is provided below the prefabricated bridge deck structure 6, and the limit auxiliary component 8 is installed between two adjacent steel cap beams 5.

In other embodiments, when the span of the bridge or the load it bears is small, the position limiting auxiliary assembly 8 can also be dismantled after the bridge is built so as to be recycled in other projects.

In the above example, specifically, the limiting auxiliary component 8 includes a second retractable limiting rod 81 and a second limiting cable 82. The second retractable limiting rod 81 is symmetrically arranged between two adjacent steel cap beams 5. The steel cap beams 5 and the second retractable limiting rod 81 together form a second area. The second limiting cable 82 is cross-arranged in the second area, thereby forming a more stable triangular frame structure. After the tensioned beam bridge structure forms a self-balancing system, the steel cap beams 5 should be placed on the same plane, and then the prefabricated panels should be symmetrically laid from both ends to the middle.

It should be noted that the second area may be a rectangular structure or an inverted trapezoidal structure.

In some examples, a step plate 9 is laid between two adjacent main cables 2, wherein the step plate 9 can play the same role as the first retractable limit rod 3, that is, lateral limitation. At the same time, the step plate 9 can also be used as a construction and maintenance work platform to facilitate the assembly of the bridge.

In other examples, the span L between two side pier cap beams 1 is ≤100 m, and the width D of the prefabricated bridge deck structure 6 is ≤16 m.

In other examples, the sagittal height between the prefabricated bridge deck structure 6 and the lowest point of the main cables 2 is H, wherein 12.5 m ≤ H ≤ 20 m.

In other embodiments, as shown in FIG. 9 , the prefabricated beam-string bridge structure further includes a ground anchor 11, a tower column 12 and an auxiliary cable 13, wherein the number of the ground anchors 11 is two and they are respectively arranged on both sides of the two side pier cap beams; the tower column 12 is arranged between the ground anchor 11 and the side pier cap beam 1, and the height of the tower column 12 is greater than the height of the ground anchor 11 and the side pier cap beam 1; the auxiliary cable 13 is connected between the ground anchor 11 and the main cable 2, and the auxiliary cable 13 is arranged to pass through the highest point of the tower column 12, thereby speeding up the assembly efficiency of the prefabricated beam-string bridge structure.

In the above embodiment, by setting a lightweight second retractable limit rod 81 and a second limit cable 82, the tonnage of the ground anchor 11 can be reduced, the construction efficiency can be improved, and the project investment can be reduced; before the bridge deck structure is completed, the beam-string structure cannot form a self-balancing system, and it is necessary to use the ground anchor 11 to balance the tension of the beam string through the cable. The heavier the bridge deck structure, the greater the tonnage of the ground anchor 11. In order to reduce the tonnage of the ground anchor 11, a lightweight second retractable limit rod 81 and a second limit cable 82 are set to form a self-balancing system. After the self-balancing system of the beam-string bridge structure is formed, the prefabricated panels are symmetrically laid from both ends to the middle to improve construction efficiency and reduce construction costs.

In summary, the utility model provides an assembled tension-beam bridge structure, which adopts a retractable diagonal brace 4 to replace the existing vertical brace, which can effectively solve the problem of low vertical stiffness of the bridge. At the same time, when the bridge deck undergoes obvious vertical deformation in the middle and late stages of operation, the adjustability of the retractable diagonal brace 4 is utilized to restore the flatness of the bridge deck by adjusting the length of the retractable diagonal brace 4; and the retractable diagonal brace 4 is arranged in a serrated shape between the main cable 2 and the prefabricated bridge deck structure 6, and a first retractable limit rod 3 is connected between two adjacent main cables 2, and each main cable 2 forms a curve with a concave surface facing outward on the plane, so that the distance between the middle parts of the two adjacent main cables 2 is smaller than the distance between the two ends, and the length of the first retractable limit rod 3 in the middle part is smaller than the length of the first retractable limit rod 3 at the two ends; The relatively retractable diagonal struts 4, the first retractable limiting rods 3 and the prefabricated bridge deck structure 6 together form a first area, in which a cross-arranged first limiting cable 10 is provided, one end of the first limiting cable 10 is connected to the main cable 2, and the other end is connected to the end of the retractable diagonal strut away from the main cable, thereby effectively improving the overall lateral stability of the assembled beam-string bridge structure; in addition, the utility model enables the beam-string bridge structure to achieve self-balancing by arranging a limiting auxiliary component 8, thereby solving the problems of the prior art that when the beam-string structure is applied to a bridge with a large span, its structural stiffness is small, its lateral stability is poor, the bridge deck is prone to obvious vertical deformation in the middle and late stages of operation, affecting the passage of vehicles, and the temporary anchor bearing capacity is high during construction, and the construction conditions and costs are high.

The above is only a preferred embodiment of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the utility model, and these improvements and substitutions should also be regarded as the protection scope of the utility model. The above shows and describes the basic principles, main features and advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above preferred embodiments. The embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, so it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims in the utility model.

In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims (8)

1. An assembled beam-string bridge structure, comprising:

the two side pier bent caps are oppositely arranged;

the two ends of each main inhaul cable are respectively connected with two side pier bent caps to form an arc-shaped structure with an upward opening on a vertical surface, a first telescopic limiting rod is connected between two adjacent main inhaul cables, each main inhaul cable forms a curve with a concave surface facing outwards on a plane, so that the distance between the middle parts of the two adjacent main inhaul cables is smaller than that between the two ends, and the length of the first telescopic limiting rod at the middle part is smaller than that of the first telescopic limiting rods at the two ends;

the prefabricated bridge deck structure is horizontally arranged between the two side pier bent caps, and a steel bent cap is arranged at the bottom of the prefabricated bridge deck structure; and

the telescopic inclined stay bars are arranged between the main inhaul cable and the prefabricated bridge deck structure in a zigzag manner, one end of each telescopic inclined stay bar is connected with the end part of the first telescopic limit bar, and the other end of each telescopic inclined stay bar is connected with the steel bent cap;

the telescopic inclined stay rod is arranged on the prefabricated bridge deck structure, a first region is defined between the telescopic inclined stay rod and the prefabricated bridge deck structure, a first limiting stay rope is arranged in the first region in a crossing mode, one end of the first limiting stay rope is connected with the main stay rope, and the other end of the first limiting stay rope is connected with one end, far away from the main stay rope, of the telescopic inclined stay rod.

2. The assembled string bridge structure according to claim 1, wherein the prefabricated deck structure is formed by paving a plurality of prefabricated panels, a wet joint is reserved between two adjacent prefabricated panels, and the wet joint is arranged corresponding to the steel cap beam.

3. The assembled beam-string bridge structure according to claim 1, wherein two telescopic diagonal braces connected to the same steel cap beam and the main cable together define a triangular area; or alternatively

And a triangular area is formed by the two telescopic diagonal braces and the steel bent cap, wherein the telescopic diagonal braces and the steel bent cap are connected with the same first telescopic limiting rod.

4. The assembled beam-string bridge structure as defined in claim 1, further comprising:

the two ground anchors are respectively arranged at two sides of the two side pier capping beams;

the tower column is arranged between the ground anchor and the side pier capping beam, and the height of the tower column is larger than that of the ground anchor and the side pier capping beam; and

the auxiliary inhaul cable is connected between the ground anchor and the main inhaul cable, and the auxiliary inhaul cable penetrates through the highest point of the tower column.

5. The assembled beam-string bridge structure according to claim 1, further comprising a limiting auxiliary assembly, wherein the limiting auxiliary assembly is arranged below the prefabricated deck structure, and the limiting auxiliary assembly is arranged between two adjacent steel cap beams.

6. The assembled bridge girder construction of string beams according to claim 5, wherein the limit auxiliary assembly comprises a second telescopic limit rod, the second telescopic limit rod is symmetrically arranged between two adjacent steel cap girders, and a second area is jointly enclosed between the steel cap girders and the second telescopic limit rod.

7. The assembled beam-string bridge structure according to claim 6, wherein the spacing aid assembly further comprises a second spacing cable, the second spacing cable being disposed crosswise in the second region.

8. The assembled string bridge structure according to claim 1, wherein a bridge plate is further laid between two adjacent main cables.