CN210946439U

CN210946439U - Bridge span structure

Info

Publication number: CN210946439U
Application number: CN201920996371.8U
Authority: CN
Inventors: 黄卓驹; 丁洁民; 张峥; 项圣懿
Original assignee: Architecture Design and Research Institute of Tongji University Group Co Ltd
Current assignee: Architecture Design and Research Institute of Tongji University Group Co Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-07-07
Anticipated expiration: 2029-06-28

Abstract

The utility model relates to a bridge span structure, truss bridge portion (1) and suspension cable bridge portion including interconnect. Compared with the prior art, the utility model is suitable for the situation that the three-end road can not be completely aligned; the structure is light and handy, and materials are saved; the field of vision on the bridge is wide; the space under the bridge is spacious, which is beneficial to navigation.

Description

Bridge span structure

Technical Field

The utility model belongs to the technical field of the bridge span and specifically relates to a bridge span structure is related to.

Background

Traditionally, there are four bridge construction systems: girder bridges, arch bridges, suspension bridges, rigid frame bridges. With the development of building materials and design technologies, novel bridge systems are derived on the basis of four bridge types. Such as cable-stayed bridges, suspension bridges, etc.

The bridge span structure can be divided into single span, two spans, three spans, multi-span and the like according to the bridge span structure number of the bridge. The bridge span quantity is less, and the pier of required lower part just is less, because pier can influence the channel and pass, and its construction is generally under water, and the construction is expensive, and the operation is difficult and the risk is great. It is generally desirable to achieve spanning using as large spans as possible and as small a number of bridge spans as possible, as economic and technical conditions permit.

However, in practice, a situation that three or more land blocks need to be connected through one bridge is often encountered, and at this time, the traditional bridge span structure system only considers two-point connection, so that the requirement is difficult to meet, and a new structure system needs to be considered according to actual site conditions and bridge building functions. For the ideal three-side equilateral condition, the planar arrangement of rings, stars and the like can be adopted, and the problem is solved by extending the traditional bridge system with two-point connection into three-point connection. However, in reality, the situation that two banks of the three banks are close to each other and the third bank is far from the other two banks is often encountered. In this case, a single bridge form is difficult to give full play to advantages, and comprehensive solution by combining according to local conditions is a more reasonable scheme.

Therefore, a bridge span structure needs to be designed, and the bridge span structure is applied to a bridge, so that the advantages of various bridge types are fully exerted, and the bridge design which is economical, feasible, attractive and practical is obtained.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a bridge span structure for overcoming the above-mentioned drawbacks of the prior art.

The purpose of the utility model can be realized through the following technical scheme:

a bridge span structure includes a truss bridge and a span bridge connected to each other.

The truss bridge comprises an upper chord, a truss bridge deck, a lower chord and web members, wherein the web members are respectively connected with the upper chord and the lower chord, and the truss bridge deck is connected with the upper chord or the lower chord.

The truss bridge deck is a bending plane.

One end of the suspension cable bridge part is connected with the bending part of the bending plane, and the other end of the suspension cable bridge part is connected with the ground bridge abutment.

The suspension bridge part comprises a suspension bridge deck and a cable rod assembly which are connected with each other.

The cable rod assembly comprises a mast, a back cable, a main cable and a suspender, wherein the main cable is respectively connected with the back cable, the mast and the suspender, and the suspender is connected with the bridge floor of the suspension bridge.

The hanger rod is connected with the single side of the suspension bridge deck.

The included angle between the hanger rod and the bridge floor of the suspension bridge is 40-70 degrees.

One end of the main cable is connected with the top ends of the mast and the back cable, and the other end of the main cable is connected with the truss bridge.

The bottom ends of the mast and the back cable are connected with the ground abutment.

Compared with the prior art, the utility model has the advantages of it is following:

(1) by adopting the structure that the suspension cable bridge part is connected with the truss bridge part, the truss bridge part objectively provides an elastic boundary for one end of the suspension cable bridge part.

(2) The truss bridge deck is a bending plane, one end of the suspension cable bridge part is connected with the bending part of the bending plane, and the suspension cable bridge can be applied to the situation that the trend of a three-end road cannot be completely aligned.

(3) The structure is light, the dead weight of the bridge body is reduced, and materials are saved.

(4) The field of vision on the bridge is wide: for the suspension bridge part, the suspension rod is connected with the bridge floor of the suspension bridge only at one side close to the mast, so that no structure is arranged at the other side to shield the visual field, and the suspension bridge has wider landscape and visual field.

(5) The space under the bridge is wide: for the suspension cable bridge part, the suspension cable bridge part is mainly supported by a mast and a back cable, only the other end is provided with a post to be connected with a ground bridge abutment, and the space under the bridge is spacious, thereby being beneficial to navigation.

(6) The included angle between the suspension rod and the bridge deck of the suspension bridge is 40-70 degrees, and the suspension bridge has good stability.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic top view of the present invention;

fig. 3 is a schematic view of the structure of the present invention;

fig. 4 is a schematic side view of the present invention;

FIG. 5 is a schematic view of the exploded structure of the present invention;

fig. 6 is a deformation diagram of the use state of the embodiment of the present invention;

reference numerals:

1 is a truss bridge part; 2 is a suspension bridge deck; 3 is a suspender; 4 is a main cable; 5 is a mast; 6 is a back rope.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Examples

A novel three-branch bridge span structure can be applied to bridges which are connected with three banks and have different spans and is used as a part of a bridge structure.

As shown in fig. 1 to 5, the bridge span structure is composed of a truss bridge part 1 and a suspension bridge part. The truss bridge part 1 comprises an upper chord, a truss bridge deck, a lower chord and web members, wherein the web members are respectively connected with the upper chord and the lower chord, the truss bridge deck is connected with the upper chord or the lower chord, and the truss bridge deck is a bending plane. The suspension bridge part consists of a suspension bridge deck 2 and a cable rod component. The suspension bridge deck 2 part comprises ridge beams, cantilever beams and edge sealing beams. The suspension bridge deck 2 is a linear plane; one side of the suspension bridge deck 2 is cantilevered; one end of the suspension bridge deck 2 is connected with the bending part of the truss bridge deck, one end of the suspension bridge deck 2 is rigidly connected with the bending part of the truss bridge deck, and the other end of the suspension bridge deck is supported by the ground abutment. The cable-strut assembly comprises a boom 3, a main cable 4, a mast 5 and a backstay 6. A cable-stayed system consisting of a suspender 3 and a main cable 4 pulls the side of the suspended cable bridge surface which is not suspended, load is transmitted to the main cable 4 through the suspender 3 and then to a mast 5, and two back cables 6 are arranged behind the back to balance the tension of the main cable 4.

The suspender 3 is connected with one side of the suspension bridge deck 2, and the included angle between the suspender and the suspension bridge deck 2 is 40-70 degrees.

The main cable 4 is connected at one end to the mast 5 and at the other end to the upper chord of the truss bridge 1. The top end of the mast 5 is connected with the back cable 6 and the main cable 4, and the bottom end is directly connected with the ground abutment.

The top ends of the two back cables 6 are connected with the top end of the mast 5, and the bottom ends are directly connected with the ground abutment.

The maximum span part of the bridge span structure adopts a suspension bridge.

Take a certain three-fork landscape walking bridge as an example:

in the three-branch landscape walking bridge, the total length of the bridge span is 135m, the main span is 121m, the main body is a light structural system, the three-branch Y-shaped column-free layout is adopted, and the rigid-flexible combined structural scheme of a single-side asymmetric suspension cable and a truss system is adopted.

The bridge span comprises a truss bridge part 1 and a suspension cable bridge part, wherein one end of the suspension cable bridge part is connected with a bent part of the truss bridge deck, the other end of the suspension cable bridge part is placed on a ground bridge abutment support, and the suspension bridge deck 2 is selected as a variable cross-section cantilever beam; the suspension bridge part also comprises a suspension rod 3, a main cable 4, a mast 5 and a back cable 6, the plane of the truss bridge part 1 is a fold-line plane, the bent part is connected with the suspension bridge part, one bent side of the truss bridge deck and the suspension bridge part form an angle of 133 degrees, and the other side of the bent side of the truss bridge deck is an angle of 103 degrees; the suspension rod 3 is connected with the suspension bridge deck 2 in the oblique direction and only exists on one side in the direction of the mast 5, so that the suspension rod 3 does not influence the view of the other side of the suspension bridge deck 2, the load is transmitted to the main cable 4 through the suspension rod 3 and then to the mast 5, and the main cable 4 and the mast 5 are balanced through the back cable 6. The lower ends of the mast 5 and the back cable 6 are both connected with the ground abutment, and the upper ends are both connected with the main cable 4.

The bridge span structure has good structural performance under the condition of meeting the requirement of functionality.

The main cable 4 is made of high-strength inhaul cable materials such as a high-vanadium coating cable, a sealing steel wire rope and the like.

Fig. 6 shows the correlation shift analysis results. Analysis shows that the maximum position of the structure is shifted out of the middle part of the span of the suspension bridge, the deformation of the three-branch bridge presents good integrity, all indexes of the structure can meet the standard requirement of safe use of design, and the method is economical and feasible.

Compared with the prior art, the beneficial effects of the utility model are embodied in following several aspects:

1. the three-branch-shaped bridge deck routing device is suitable for three-end roads with the trends which cannot be completely aligned.

2. The truss bridge part objectively provides an elastic boundary for one end of the suspension cable bridge part at the boundary position of the connection part by adopting a structure that the suspension cable bridge part is connected with the truss bridge part;

3. the structure is light and handy, compares in general structure bridge span, because the structural part of bridge span maximum span adopts the form of suspension bridge, and its main tension part does not have the unstability problem, adopts the system of drawing to one side can make the cross-section minimizing, and the part that bears is the girder steel, and stability guarantees more easily. Therefore, the utilization efficiency of the whole material is high, and compared with the traditional bridge type of a single system, the self weight of the bridge body is greatly reduced, and the material is saved.

4. The field of vision is wide on the bridge, and to suspension cable bridge portion, the jib is only connected with the bridge floor in the one side that is close to the mast, so the opposite side does not have the structure and shelters from the field of vision, compares with traditional suspension bridge, can have more open view and field of vision.

5. The space under the bridge is spacious, and for the suspension cable bridge part, the mast and the back cable are mainly used for bearing force, in addition, one end of the suspension cable bridge is directly connected with the truss bridge part, and only the other end is connected with the ground bridge abutment, so the space under the bridge is spacious, and the navigation is facilitated.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims

1. The bridge span structure is characterized by comprising a truss bridge part (1) and a suspension bridge part which are connected with each other, wherein the truss bridge part (1) comprises a truss and a truss bridge deck which are connected with each other, the truss bridge deck is a bending plane, the suspension bridge part comprises a suspension bridge deck (2) and a cable rod assembly which are connected with each other, one end of the suspension bridge deck (2) is connected with the bending part of the bending plane, the other end of the suspension bridge deck is connected with a first ground bridge abutment, two ends of the truss bridge deck are respectively connected with a second ground bridge abutment and a third ground bridge abutment, and the cable rod assembly is respectively connected with the first ground bridge abutment and the truss.

2. A bridge span structure according to claim 1, wherein the truss comprises an upper chord, a lower chord and web members connecting the upper chord and the lower chord respectively, and the truss bridge deck connects the upper chord or the lower chord.

3. A bridge span structure according to claim 1, wherein the cable assembly comprises a mast (5), a backstay (6), a main cable (4) and a suspension rod (3), the main cable (4) is connected with the backstay (6), the mast (5) and the suspension rod (3) respectively, the suspension rod (3) is connected with the suspension bridge deck (2), one end of the main cable (4) is connected with the top ends of the mast (5) and the backstay (6), the other end is connected with the truss bridge (1), and the bottom ends of the mast (5) and the backstay (6) are connected with the first ground bridge platform.

4. A bridge span structure according to claim 3, wherein said suspension rods (3) are attached to the deck (2) of the suspension bridge on one side.

5. A bridge span structure according to claim 4, wherein the angle between the hanger rods (3) and the bridge deck (2) of the suspension bridge is 40-70 °.