A new type of cable-beam anchoring system for cable-stayed bridges, external steel anchor pipe and operation method thereof

Abstract

The present invention discloses an external steel anchor pipe of a new cable-beam anchoring system for a cable-stayed bridge and an operation method thereof, which belongs to the technical field of bridge design, and is composed of a pressure plate, a steel anchor pipe, an anchor web, an upper stabilizing plate, a lower stabilizing plate, a bridge deck support plate, a stiffening plate and bolts; the pressure plate is welded to the bottom end of the steel anchor pipe, one end of the anchor web is welded to the wall of the steel anchor pipe, and the other end is welded to the main beam web and the top and bottom plates, the upper and lower stabilizing plates are respectively welded to the steel anchor pipe, the anchor web and the main beam web, the stiffening plates are welded on the anchor web between the upper and lower stabilizing plates and on the inner side of the main beam at positions corresponding to the upper and lower stabilizing plates, the bridge deck support plate is welded to the upper end of the anchor pipe, and is connected to the bridge deck by bolts. The present invention also provides an operation method of an external steel anchor pipe of a new cable-beam anchoring system for a cable-stayed bridge. The present invention can be applied to cable-stayed bridges of any span, and the load is transferred between the cable and the main beam by shear force, and secondary welding is not required on site, thereby ensuring the construction quality.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge design, and relates to an external steel anchor pipe of a new cable-beam anchoring system of a cable-stayed bridge and an operation method thereof. Background Art

[0002] The external anchor pipe evolved from the mature domestic cable anchoring system steel anchor box and internal anchor pipe. It combines the advantages of both, with simple structure and clear force transmission. The external anchor pipe is installed on the outside of the web of the main beam like the anchor box. The connection with the web can be welded or bolted, and both the tower end and the beam end can be tensioned. The external anchor pipe can be applied to cable-stayed bridges of any span. The load is transmitted between the cable and the main beam by shear force. All steel components and main beam segments are manufactured together in the factory, without the need for secondary welding on site, ensuring construction quality and accelerating construction progress.

[0003] At present, the traditional cable anchoring systems for steel main beam cable-stayed bridges mainly include anchor box type and plate type, both of which have obvious disadvantages: the space inside the anchor box is small, and construction and maintenance are difficult; the plate type mainly bears tension in the weld seam, and has poor fatigue resistance, and mountain bridges need to be welded on site for secondary reasons due to inconvenience in transportation, and the construction quality cannot be guaranteed. The plate is set on the top of the main beam, occupies the effective width of the bridge deck, and has a certain impact on wind resistance. The external anchor pipe can well solve the defects of the traditional anchor box type and plate type, and provide a new cable-beam anchoring structure option for cable-stayed bridges. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects in the prior art and provide an external steel anchor pipe of a new cable-beam anchoring system for a cable-stayed bridge and an operation method thereof.

[0005] The technical solution is as follows:

[0006] A new type of cable-girder anchoring system for a cable-stayed bridge, an external steel anchor pipe, comprises a steel anchor pipe, an anchor web, an upper stabilizing plate, a lower stabilizing plate, a first stiffening plate and a support plate, a pressure plate is welded to the lower end of the steel anchor pipe, two ends of the anchor web are respectively welded to the steel anchor pipe and the main beam, the upper stabilizing plate, the lower stabilizing plate and the first stiffening plate are respectively welded to the steel anchor pipe, the anchor web and the main beam web, the upper stabilizing plate and the lower stabilizing plate are welded to the second stiffening plate on the opposite side of the main beam web, the second stiffening plate is respectively welded to the cable crossbeam and the third stiffening plate, two ends of the support plate are respectively welded to the steel anchor pipe and the base plate, and the base plate is connected to the bridge deck with welded bolts.

[0007] Furthermore, one end of the anchor web is fixedly connected to the main beam top, bottom plate and web by welding, and the other end of the anchor web is fixedly connected to the steel anchor pipe by welding.

[0008] Furthermore, a pressure plate is provided at the lower end of the steel anchor pipe, and the pressure plate and the steel anchor pipe are fixedly connected by welding after being polished, tightened, and then fixedly connected.

[0009] Furthermore, one end of the support plate is fixedly connected to the steel anchor pipe by welding, and the other end of the support plate is fixedly connected to the base plate by welding, and the base plate is fixedly connected to the bolt by welding.

[0010] Furthermore, the center of the lower stabilizing plate is arranged corresponding to the center of the cable beam, and the center of the third stiffening plate is arranged corresponding to the center of the upper stabilizing plate.

[0011] Furthermore, the upper stabilizing plate, the lower stabilizing plate and the first stiffening plate are fixedly connected to the steel anchor pipe, the anchor web and the main beam web respectively by welding.

[0012] Further preferably, the support plate and the main beam bridge deck are anchored by setting shear nails to form a steel-concrete joint section.

[0013] The method for operating the external steel anchor pipe of the novel cable-beam anchoring system of the cable-stayed bridge of the present invention comprises the following steps:

[0014] Step 1: First, complete the manufacturing of the steel main beam segment in the factory;

[0015] Step 2: Complete the cutting of the steel components of the external steel anchor pipe;

[0016] Step 3, the anchor web is welded to the top plate, bottom plate and web of the steel main beam into a whole;

[0017] Step 4: The pressure plate is first welded to the steel anchor pipe as a whole, and then welded to the anchor web as a whole;

[0018] Step 5, welding the upper stabilizing plate, the lower stabilizing plate and the first stiffening plate, the second stiffening plate and the third stiffening plate at corresponding positions;

[0019] Step 6: After the support plate, base plate and studs are welded into a whole, first weld the end of the support plate to the steel anchor pipe, and then weld the base plate to the flange of the main beam top plate.

[0020] Beneficial effects of the present invention:

[0021] The external steel anchor pipe of the novel cable-beam anchoring system of the cable-stayed bridge of the present invention can be applied to cable-stayed bridges of any span. The load is transferred between the cable and the main beam by shear force, which provides a new cable-beam anchoring structure option for cable-stayed bridges. Secondly, all steel components and main beam segments of the external anchor pipe are manufactured together in the factory, and there is no need for secondary welding on site, which ensures construction quality, speeds up construction progress, and is suitable for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a longitudinal bridge elevation view of an external steel anchor pipe of a new cable-girder anchoring system for a cable-stayed bridge of the present invention;

[0023] Figure 2 It is a transverse bridge elevation view of an external steel anchor pipe of a new cable-girder anchoring system of a cable-stayed bridge of the present invention;

[0024] Figure 3 It is a structural cross-sectional view of the lower stabilizing plate corresponding to the external steel anchor pipe of the novel cable-beam anchoring system of the cable-stayed bridge of the present invention;

[0025] Figure 4 It is a structural cross-sectional view of the upper stabilizing plate corresponding to the external steel anchor pipe of the novel cable-beam anchoring system of the cable-stayed bridge of the present invention;

[0026] Figure 5 It is a structural cross-sectional view of a stiffening plate corresponding to an external steel anchor pipe of a new cable-beam anchoring system of a cable-stayed bridge of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the support plate corresponding to the external steel anchor pipe of the new cable-beam anchoring system of the cable-stayed bridge of the present invention;

[0028] Figure 7 It is a structural cross-sectional view of a steel anchor pipe corresponding to an external steel anchor pipe of a new cable-beam anchoring system of a cable-stayed bridge of the present invention;

[0029] Figure 8 It is a structural schematic diagram of the anchor web corresponding to the external steel anchor pipe of the novel cable-girder anchoring system of the cable-stayed bridge of the present invention. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Example

[0031] See also Figure 1-Figure 8 The present invention provides a technical solution: an external steel anchor pipe of a new cable-beam anchoring system of a cable-stayed bridge, comprising a steel anchor pipe 2, an anchor web 3, an upper stabilizing plate 5, a lower stabilizing plate 4, a first stiffening plate 6 and a support plate 9, a pressure plate 1 is welded to the lower end of the steel anchor pipe 2, two ends of the anchor web 3 are respectively welded to the steel anchor pipe 2 and the main beam 14, the upper stabilizing plate 5, the lower stabilizing plate 4 and the first stiffening plate 6 are respectively welded to the steel anchor pipe 2, the anchor web 3 and the main beam web, the upper stabilizing plate 5 and the lower stabilizing plate 4 are welded to the second stiffening plate 7 on the opposite side of the main beam web, the second stiffening plate 7 is respectively welded to the cable cross beam 13 and the third stiffening plate 8, the two ends of the support plate 9 are respectively welded to the steel anchor pipe 2 and the base plate 10, and the base plate 10 is welded with studs 11 connected to the bridge deck 12;

[0032] In this embodiment, preferably, one end of the anchor web 3 is fixedly connected to the top, bottom plate and web of the main beam by welding, the other end of the anchor web 3 is fixedly connected to the steel anchor pipe 2 by welding, the lower end of the steel anchor pipe 2 is provided with a pressure plate 1, the pressure plate 1 is fixedly connected to the steel anchor pipe 2 by welding after polishing and tightening, one end of the support plate 9 is fixedly connected to the steel anchor pipe 2 by welding, and the other end is fixedly connected to the base plate 10 by welding, the base plate 10 is fixedly connected to the stud 11 by welding, the center of the lower stabilizing plate 4 is arranged corresponding to the center of the cable beam 13, the center of the third stiffening plate 8 is arranged corresponding to the center of the upper stabilizing plate 5, the upper stabilizing plate 5, the lower stabilizing plate 4 and the first stiffening plate 6 are fixedly connected to the steel anchor pipe 2, the anchor web 3 and the web of the main beam by welding respectively. The external anchor pipe can be applied to cable-stayed bridges of any span. Example

[0033] See also Figure 1-Figure 8 The present invention provides a technical solution: an external steel anchor pipe of a new cable-beam anchoring system of a cable-stayed bridge, comprising a steel anchor pipe 2, an anchor web 3, an upper stabilizing plate 5, a lower stabilizing plate 4, a first stiffening plate 6 and a support plate 9, a pressure plate 1 is welded to the lower end of the steel anchor pipe 2, two ends of the anchor web 3 are respectively welded to the steel anchor pipe 2 and the main beam 14, the upper stabilizing plate 5, the lower stabilizing plate 4 and the first stiffening plate 6 are respectively welded to the steel anchor pipe 2, the anchor web 3 and the main beam web, the upper stabilizing plate 5 and the lower stabilizing plate 4 are welded to the second stiffening plate 7 on the opposite side of the main beam web, the second stiffening plate 7 is respectively welded to the cable cross beam 13 and the third stiffening plate 8, the two ends of the support plate 9 are respectively welded to the steel anchor pipe 2 and the base plate 10, and the base plate 10 is welded with studs 11 connected to the bridge deck 12;

[0034] In this embodiment, preferably, one end of the anchor web 3 is fixedly connected to the top, bottom plate and web of the main beam by welding, the other end of the anchor web 3 is fixedly connected to the steel anchor pipe 2 by welding, the lower end of the steel anchor pipe 2 is provided with a pressure plate 1, the pressure plate 1 is fixedly connected to the steel anchor pipe 2 by welding after polishing and tightening, one end of the support plate 9 is fixedly connected to the steel anchor pipe 2 by welding, and the other end is fixedly connected to the base plate 10 by welding, the base plate 10 is fixedly connected to the stud 11 by welding, the center of the lower stabilizing plate 4 is arranged corresponding to the center of the cable beam 13, the center of the third stiffening plate 8 is arranged corresponding to the center of the upper stabilizing plate 5, the upper stabilizing plate 5, the lower stabilizing plate 4 and the first stiffening plate 6 are fixedly connected to the steel anchor pipe 2, the anchor web 3 and the web of the main beam by welding respectively. The external anchor pipe can be applied to cable-stayed bridges of any span.

[0035] In order to enhance the stability of the cantilever end of the steel anchor pipe, in this example, preferably, one end of the support plate 9 is fixedly connected to the steel anchor pipe 2 by welding, and the other end is fixedly connected to the base plate 10 by welding, the base plate 10 is fixedly connected to the stud 11 by welding, and the concrete of the bridge deck 12 is integrated with the stud 11;

[0036] The working principle and use process of the present invention are as follows: the steel main beam segment is manufactured in the factory first, and then the steel components of the external steel anchor pipe are cut, the anchor web 3 plate is first welded to the steel main beam top plate, bottom plate and web plate to form a whole, the pressure plate 1 is welded to the steel anchor pipe 2 to form a whole, and then welded to the anchor web 3 to form a whole, and then the upper stabilizing plate 5, the lower stabilizing plate 4 and the first stiffening plate 6, the second stiffening plate 7, the third stiffening plate 8 are welded at the corresponding positions, and the support plate 9, the base plate 10 and the bolt 11 are welded to form a whole, and then the end of the support plate 9 is welded to the steel anchor pipe 2, and then the base plate 10 is welded to the flange of the main beam top plate. All the steel components and the main beam segments of the external anchor pipe are manufactured together in the factory, and there is no need for secondary welding on site, which ensures the construction quality and speeds up the construction progress. In addition, the external anchor pipe can increase the effective width of the bridge deck, reduce the bridge deck width, and reduce the project cost.

[0037] The above is only a preferred specific implementation manner of the present invention, and the protection scope of the present invention is not limited thereto. Any simple change or equivalent replacement of the technical solution that can be obviously obtained by any technician familiar with the technical field within the technical scope disclosed in the present invention falls within the protection scope of the present invention.

Claims

1. A new type of cable-beam anchoring system for a cable-stayed bridge with an external steel anchor pipe, characterized in that: The invention comprises a steel anchor pipe (2), an anchor web (3), an upper stabilizing plate (5), a lower stabilizing plate (4), a first stiffening plate (6) and a support plate (9). A pressure plate (1) is welded to the lower end of the steel anchor pipe (2). Two ends of the anchor web (3) are respectively welded to the steel anchor pipe (2) and the main beam (14). The upper stabilizing plate (5), the lower stabilizing plate (4) and the first stiffening plate (6) are respectively welded to the steel anchor pipe (2), the anchor web (3) and the main beam web. The upper stabilizing plate (5) and the lower stabilizing plate (4) are welded to a second stiffening plate (7) on the opposite side of the main beam web. The second stiffening plate (7) is further welded to a cable cross beam (13) and a third stiffening plate (8). Two ends of the support plate (9) are respectively welded to the steel anchor pipe (2) and the base plate (10). Bolts (11) are welded on the base plate (10) and connected to the bridge deck (12).

2. The external steel anchor pipe of the new cable-beam anchoring system for a cable-stayed bridge according to claim 1 is characterized by: One end of the anchor web (3) is fixedly connected to the main beam top, bottom plate and web by welding, and the other end of the anchor web (3) is fixedly connected to the steel anchor pipe (2) by welding.

3. The external steel anchor pipe of the new cable-beam anchoring system for a cable-stayed bridge according to claim 2 is characterized by: A pressure plate (1) is provided at the lower end of the steel anchor pipe (2), and the pressure plate (1) and the steel anchor pipe (2) are fixedly connected by welding after being polished, tightened, and then fixedly connected.

4. The external steel anchor pipe of the new cable-beam anchoring system for a cable-stayed bridge according to claim 3 is characterized by: One end of the support plate (9) is fixedly connected to the steel anchor pipe (2) by welding, and the other end is fixedly connected to the base plate (10) by welding, and the base plate (10) is fixedly connected to the bolt (11) by welding.

5. The external steel anchor pipe of the new cable-beam anchoring system for a cable-stayed bridge according to claim 4 is characterized by: The center of the lower stabilizing plate (4) is arranged corresponding to the center of the cable crossbeam, and the center of the third stiffening plate (8) is arranged corresponding to the center of the upper stabilizing plate (5).

6. The external steel anchor pipe of the novel cable-beam anchoring system for a cable-stayed bridge according to any one of claims 1 to 5, characterized in that: The upper stabilizing plate (5), the lower stabilizing plate (4) and the first stiffening plate (6) are respectively fixedly connected to the steel anchor pipe (2), the anchor web (3) and the main beam web by welding.

7. An operating method for the external steel anchor pipe of the novel cable-beam anchoring system of a cable-stayed bridge according to claim 1, characterized in that: The following steps are involved: Step 1: First, complete the manufacturing of the steel main beam segment in the factory; Step 2: After the steel components of the external steel anchor pipe are cut, the anchor web (3) is first welded to the top plate, bottom plate and web of the steel main beam to form a whole, and the pressure plate (1) is welded to the steel anchor pipe (2) to form a whole and then welded to the anchor web (3) to form a whole; Step 3: After the upper stabilizing plate (5), the lower stabilizing plate (4), the first stiffening plate (6), the second stiffening plate (7), the third stiffening plate (8), the support plate (9), the base plate (10) and the studs (11) are welded at corresponding positions to form a whole, the end of the support plate (9) is first welded to the steel anchor pipe (2), and then the base plate (10) is welded to the flange of the main beam top plate.

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