Single-column cable-stayed bridge

Abstract

The utility model discloses a single column cable-stayed bridge, including tower column, steel cable and steel girder, the bottom side end of tower column is equipped with bridge tower branch pier, and is provided with support on the opposite side of bridge tower branch pier, one end of steel cable is fixed in the upper portion of tower column, the other end of steel cable is connected with steel girder, one end of steel girder is erected on the support, the other end of steel girder is erected on bridge tower branch pier through rubber seat, and is provided with rubber support on the steel girder end portion and tower column contact end face. The utility model sets up rubber seat on the bridge tower branch pier of tower column bottom and realizes the vertical direction support adjustment of steel girder, and through the action of rubber support and rubber seat, the separation type connection of steel girder and tower column is formed, makes the tower column of connecting place mainly bear the axial pressure of girder, and the force is simple and clear, and the tower beam separation system is formed, and because the steel mixed joint section does not need to be arranged, the stress performance of tower column is improved, the risk of reinforced concrete tower column cracking at tower beam connecting place is avoided and the construction difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, and more specifically, to a single-column cable-stayed bridge. Background Technology

[0002] Conventional cable-stayed bridges have stay cables on both sides of the bridge tower. Under dead load, the horizontal forces of the stay cables on both sides of the main tower remain balanced, and the main tower only bears certain horizontal forces and bending moments under live loads and additional loads. Unlike conventional cable-stayed bridges, cable-stayed bridges without backstays have only one cable on each side of the tower. The tower's stress manifests as a cantilever beam under the combined forces of the stay cable and its own weight. To ensure the main tower is in a good stress state, the tower of a cable-stayed bridge without backstays is generally designed to be inclined, relying on the self-weight moment of the tower to balance the overturning moment of the stay cables, thus forming a balanced beam-tower structure.

[0003] Currently, cable-stayed bridges without backstays are developing in various aspects such as large span, high towers, large inclination, and wide beams. The bridge tower is the key load-bearing structure that smoothly transmits the huge cable force of the cables or stay cables to the substructure.

[0004] Currently, the main connection between the main girder and the reinforced concrete tower of a cable-stayed bridge is the tower-girder fixed-bond system. This system achieves the connection by inserting a steel-concrete composite section into the tower column. The connection node primarily bears bending moment, axial compression of the main girder, and shear force. A schematic diagram of this structure is shown below. Figure 1 As shown, this method of tower-beam consolidation easily leads to cracking of the reinforced concrete tower column at the tower-beam connection, increasing the difficulty of construction.

[0005] Therefore, it is of great significance to propose a single-column cable-stayed bridge to solve the above problems. Utility Model Content

[0006] This utility model provides a single-column cable-stayed bridge to solve the problem that the connection between the main beam and the reinforced concrete tower column of existing cable-stayed bridges is prone to cracking.

[0007] According to one aspect of the present invention, a single-column cable-stayed bridge is provided, comprising a tower column, steel cables, and a steel main girder. A bridge tower pier is installed at the bottom side of the tower column, and a support is provided on the opposite side of the bridge tower pier. One end of the steel cable is fixed to the upper part of the tower column, and the other end of the steel cable is connected to the steel main girder. One end of the steel main girder is supported on the support, and the other end of the steel main girder is supported on the bridge tower pier through a rubber seat. A rubber support is provided on the end face of the steel main girder that contacts the tower column.

[0008] Based on the above scheme, a preferred embodiment is provided where a right-angled retaining wall is provided on the side of the support away from the tower column.

[0009] Based on the above scheme, a preferred embodiment is that a right-angled retaining wall is provided on the side of the tower column away from the support.

[0010] Based on the above scheme, a preferred embodiment is that a steel plate frame is fitted onto the tower column, and a connecting lug is provided on the outer side of the steel plate frame, and the steel cable is fixed on the connecting lug.

[0011] Based on the above scheme, a preferred option is that a ground anchor is integrally formed on the bearing platform, and a steel cable is anchored on the ground anchor, with the other end of the steel cable fixed to the connecting lug plate.

[0012] Based on the above scheme, a preferred embodiment is that steel blocks are provided at the bottom of both ends of the main steel beam, and the sides of the steel blocks are constrained by the bridge tower supports.

[0013] This utility model discloses a single-column cable-stayed bridge. The bridge tower supports the main steel beam through piers and bearings. Steel cables are used to reduce the overall force exerted on the piers and bearings. Rubber supports are installed on the piers at the base of the tower column to provide vertical support and adjustment for the main steel beam. Rubber bearings are also installed on the contact surfaces between the main steel beam and the tower column. Through the action of the rubber bearings, a separate connection between the main steel beam and the tower column is formed. This allows the tower column at the connection point to primarily bear the axial pressure of the main beam, resulting in a simple and clear stress distribution. The resulting separate tower-beam system, by eliminating the need for a steel-concrete joint section, improves the stress performance of the tower column, avoids the risk of cracking in the reinforced concrete tower column at the tower-beam connection, and reduces construction difficulty. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of the tower-beam consolidation structure in the prior art of this utility model; Figure 2 This is a schematic diagram of the structure of the single-column cable-stayed bridge of this utility model; Figure 3 This is a schematic diagram of the right-side overlap of the single-column cable-stayed bridge of this utility model; Figure 4 This is a partial schematic diagram of another overlapping section of the single-column cable-stayed bridge of this utility model; Figure 5 This is a partial schematic diagram of the single-column cable-stayed bridge of this utility model; Explanation of icon numbers: 1. Tower column; 2. Steel cable; 3. Steel main beam; 4. Bridge tower pier; 5. Bearing; 6. Rubber seat; 7. Retaining wall; 8. Steel plate frame; 81. Connecting ear plate; 9. Ground anchor; 10. Steel stop block. Detailed Implementation

[0015] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0016] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of a descriptive feature, integral, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or sets.

[0017] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0018] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0019] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various components of this invention are relative rather than absolute. These descriptions are appropriate when these components are in the positions shown in the drawings. If the descriptions of the positions of these components change, these directional indications also change accordingly.

[0020] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0022] Please see Figure 2 and combined Figure 3 and Figure 4 , Figure 5 As shown, this utility model discloses a single-column cable-stayed bridge, including a tower column 1, a steel cable 2, and a steel main beam 3. A bridge tower support 4 is installed at the bottom side of the tower column 1, and a support 5 is provided on the opposite side of the bridge tower support 4. One end of the steel cable 2 is fixed to the upper part of the tower column 1, and the other end of the steel cable 2 is connected to the steel main beam 3. The support 5 is recessed downward on the side near the tower column 1 to form a stepped surface. One end of the steel main beam 3 is supported on the stepped surface, and the other end of the steel main beam 3 is supported on the bridge tower support 4 through a rubber seat 6. A rubber support is provided on the end face of the steel main beam 3 that contacts the tower column 1.

[0023] Among them, a right-angled retaining wall 7 is set on the side of the support 5 away from the tower column 1, and a right-angled retaining wall 7 is set on the side of the tower column 1 away from the support 5. The lower part of the bridge tower is designed as a retaining wall 7 structure with greater rigidity to resist the horizontal component force of the cable transmitted by the main beam, and at the same time block the backfill of the stairway.

[0024] To increase the anchorage range with the reinforced concrete tower column, expand the force transmission surface of the steel cable 2, and reduce the adverse effects of stress concentration, a steel plate frame 8 is fitted onto the tower column 1 of this invention. The shape of the steel plate frame 8 is adapted to the cross-section of the tower column, and it is preferably made of high-strength stainless steel plate welded together. Connecting lugs 81 are provided on the outer side of the steel plate frame 8. Multiple connecting lugs 81 can be provided according to actual needs, such as... Figure 3 As shown, the steel plate frame 8 of this utility model is provided with a left connecting ear plate 81 and a right connecting ear plate 81, and the steel cable 2 is fixed on the left connecting ear plate 81.

[0025] In order to ensure the strength of the anchoring, this utility model has an integrally formed ground anchor 9 on the bearing platform, and a steel cable 2 is anchored on the ground anchor 9. The other end of the steel cable 2 is fixed to the connecting ear plate 81.

[0026] Furthermore, steel blocks 10 are installed at the bottom of both ends of the main steel beam 3 of this invention, and the sides of the steel blocks 10 are constrained by the bridge tower supports 4. That is, the self-weight of the main steel beam 3 is sufficient to resist the vertical component force Fy of the steel cable 2, and the two supports of the main steel beam 3 on the tower column 1 side are under compression and will not be released. The two supports at the beam ends of the main steel beam 3 are always under compression, so that the main steel beam 3 does not twist and the structure of the main steel beam 3 is guaranteed to be stable.

[0027] This utility model discloses a single-column cable-stayed bridge. The bridge tower piers 4 and supports 5 form support for the main steel beam 3. Steel cables 2 are used to reduce the overall force exerted on the piers 4 and supports 5. Simultaneously, rubber seats 6 are installed on the piers 4 at the bottom of the tower column 1 to provide vertical support and adjustment for the main steel beam 3. Rubber supports are also installed on the contact surfaces between the main steel beam 3 and the tower column 1. Through the action of the rubber supports and rubber seats 6, a separate connection is formed between the main steel beam 3 and the tower column 1. This allows the tower column 1 at the connection point to primarily bear the axial pressure of the main beam, resulting in a simple and clear stress distribution. The resulting tower-beam separation system, by eliminating the need for a steel-concrete joint section, improves the stress performance of the tower column 1, avoids the risk of cracking in the reinforced concrete tower column 1 at the tower-beam connection, and reduces construction difficulty.

[0028] Finally, the method described in this application is merely a preferred embodiment and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A single-column cable-stayed bridge, characterized in that, The structure includes a tower column, steel cables, and a steel main beam. A bridge tower support is installed at the bottom side of the tower column, and a support is provided on the opposite side of the bridge tower support. One end of the steel cable is fixed to the upper part of the tower column, and the other end of the steel cable is connected to the steel main beam. One end of the steel main beam is supported on the support, and the other end of the steel main beam is supported on the bridge tower support through a rubber seat. A rubber support is provided on the end face of the steel main beam that contacts the tower column.

2. A single-column cable-stayed bridge as described in claim 1, characterized in that, A right-angled retaining wall is provided on the side of the support away from the tower column.

3. A single-column cable-stayed bridge as described in claim 1, characterized in that, A right-angled retaining wall is provided on the side of the tower column away from the support.

4. A single-column cable-stayed bridge as described in claim 1, characterized in that, A steel plate frame is fitted onto the tower column, and a connecting lug is provided on the outer side of the steel plate frame. The steel cable is fixed to the connecting lug.

5. A single-column cable-stayed bridge as described in claim 4, characterized in that, An anchor is integrally formed on the bearing platform, and a steel cable is anchored on the anchor. The other end of the steel cable is fixed to the connecting lug plate.

6. A single-column cable-stayed bridge as described in claim 1, characterized in that, Steel blocks are installed at the bottom of both ends of the main steel beam, and the sides of the steel blocks are constrained by the bridge tower supports.

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