Temporary anchoring device for dismantling No.0 block of concrete continuous beam cantilever

Abstract

The utility model relates to a temporary anchoring device for dismantling a No.0 block of a concrete continuous beam cantilever. The temporary anchoring device comprises an anchoring bearing beam, an anchoring prestress, an anchoring hole channel, a wedge-shaped cushion block, a frame connecting rod and an anchoring cross beam, the anchoring bearing beam is placed on the top surface of the box girder, the upper end of the anchoring prestress is anchored on the anchoring bearing beam, and the lower end of the anchoring prestress is anchored below the anchoring cross beam; frame connecting rods and anchoring cross beams which are connected with each other are arranged at the outlet position of an anchoring hole channel of a pier and surround the periphery of the bottom of the pier. The wedge-shaped cushion block is arranged between an anchoring hole channel outlet of the bridge pier and an anchoring cross beam, and anchoring force is transmitted to the bridge pier. Compared with the prior art, the bearing capacity of the bridge pier is fully utilized, the No.0 block and the bridge pier are anchored into a whole, and the reliable anchoring effect is provided.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and in particular to a temporary anchoring device for the cantilever removal of block 0 of a concrete continuous beam. Background Technology

[0002] Prestressed concrete continuous beam bridges are a common bridge structure. As the service life of these bridges increases, the need for demolition also rises. When demolishing cantilevered continuous beam bridges, the cantilever method is generally used. During demolition, the zero block needs to be removed. How to reliably anchor the zero block is crucial for the demolition work of this type of bridge. Current technology typically requires erecting steel pipe supports on both sides of the zero block to support and anchor it, which requires significant investment in temporary structures and is relatively difficult to construct. Utility Model Content

[0003] The purpose of this utility model is to overcome the defects of the existing technology and provide a temporary anchoring device for the cantilever removal of block 0 of a concrete continuous beam. It makes full use of the bearing capacity of the pier itself, anchors block 0 to the pier as one unit, and provides a reliable anchoring effect.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] This utility model provides a temporary anchoring device for the cantilever removal of block 0 of a concrete continuous beam, including: anchoring pad beam, anchoring prestress, anchoring duct, wedge-shaped pad, frame connecting rod, and anchoring crossbeam.

[0006] The anchoring pad beam is placed on the top surface of the box girder, the upper end of the anchoring prestress is anchored on the anchoring pad beam, and the lower end of the anchoring prestress is anchored below the anchoring crossbeam.

[0007] Interconnected frame connecting rods and anchor beams are installed at the outlet of the anchoring ducts of the bridge piers, surrounding the bottom of the bridge piers.

[0008] The wedge-shaped pad is placed between the anchorage outlet of the pier and the anchorage beam to transfer the anchoring force to the pier.

[0009] Furthermore, the upper end of the anchoring prestress is anchored to the anchoring pad beam by a prestressed anchor.

[0010] Furthermore, the anchoring ducts are drilled in the top plate, bottom plate, and top of the pier of the No. 0 block of the box girder, serving as channels through which the anchoring prestress passes.

[0011] Furthermore, the frame connecting rod and the anchor beam are welded together.

[0012] Furthermore, the wedge-shaped pad is a UHPC material pad.

[0013] Furthermore, the wedge-shaped pad has an inclined surface on one side, which can transmit force to the top of the pier. By setting a wedge-shaped pad with a certain slope, the shrinkage of the superstructure and the local cracking of the concrete in the pier can be controlled within an allowable range.

[0014] Furthermore, the wedge-shaped pad is cast using high-strength concrete.

[0015] Furthermore, a pre-reserved channel is provided in the middle of the anchoring beam for the anchoring prestress to pass through.

[0016] Furthermore, the frame connecting rods and anchor beams are connected by welding steel bars.

[0017] Furthermore, the anchoring prestress is made of precision-rolled threaded steel or steel strand.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] This utility model patent makes full use of the bearing capacity of the bridge pier itself, and anchors the No. 0 block to the bridge pier as one unit, providing a reliable anchoring effect. Attached Figure Description

[0020] Figure 1 Overall layout diagram for the removal of temporary anchorage device for block 0 of the cantilever concrete continuous beam;

[0021] Figure 2 This is a cross-sectional view of the top of the bridge pier;

[0022] Figure 3 This is a cross-sectional view of the bottom of the bridge pier.

[0023] Attached reference numerals: 1. Anchoring pad beam; 2. Anchoring prestress; 3. Prestressed anchorage; 4. Anchoring duct; 5. Wedge-shaped pad; 6. Frame connecting rod; 7. Anchoring crossbeam; 8. Box girder block No. 0; 9. Pier top; 10. Pier bottom. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms, and other features not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0025] This utility model provides a temporary anchoring device for the cantilever removal of block 0 of a concrete continuous beam, such as... Figure 1-3 As shown, it includes: anchoring beam 1, anchoring prestress 2, anchoring duct 4, wedge-shaped pad 5, frame connecting rod 6, and anchoring crossbeam 7.

[0026] The anchoring pad beam 1 is placed on the top surface of the box girder 8, the upper end of the anchoring prestress 2 is anchored on the anchoring pad beam 1, and the lower end of the anchoring prestress 2 is anchored below the anchoring crossbeam 7.

[0027] A frame connecting rod 6 and an anchor beam 7 are installed at the outlet of the anchoring duct 4 of the pier, which are connected to each other and surround the perimeter of the bottom 10 of the pier.

[0028] The wedge-shaped pad 5 is placed between the outlet of the anchoring hole 4 of the pier and the anchoring beam 7 to transfer the anchoring force to the pier.

[0029] In a specific embodiment, the upper end of the anchoring prestress 2 is anchored to the anchoring pad beam 1 by the prestressed anchor 3.

[0030] In a specific implementation, the anchoring channel 4 is a hole drilled in the top plate and bottom plate of the box girder 0 block 8 and the top 9 of the pier, serving as a channel through which the anchoring prestress 2 passes.

[0031] In a specific embodiment, the frame connecting rod 6 and the anchoring beam 7 are welded together.

[0032] In a specific embodiment, the wedge-shaped pad 5 is a UHPC material pad.

[0033] In a specific embodiment, the wedge-shaped pad 5 has an inclined surface on one side, which can transmit force to the top 9 of the pier. By setting the wedge-shaped pad 5 with a certain slope, the shrinkage of the superstructure and the local cracking of the concrete in the pier can be controlled within the allowable range.

[0034] In a specific embodiment, the wedge-shaped pad 5 is cast using high-strength concrete.

[0035] In a specific embodiment, a reserved hole is provided in the middle of the anchoring beam 1 for passing through the anchoring prestress 2.

[0036] In a specific embodiment, the frame connecting rod 6 and the anchoring beam 7 are connected by welding steel bars.

[0037] In a specific embodiment, the anchoring prestress 2 is made of finely rolled threaded steel or steel strand.

[0038] Components not described in detail in this embodiment are all existing components that can be purchased through public channels.

[0039] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A temporary anchoring device for the cantilever demolition of block 0 of a continuous concrete beam, characterized in that, include: Anchoring pad beam (1), anchoring prestress (2), anchoring duct (4), wedge-shaped pad (5), frame connecting rod (6), anchoring crossbeam (7); The anchoring pad beam (1) is placed on the top surface of the box girder (8), the upper end of the anchoring prestress (2) is anchored on the anchoring pad beam (1), and the lower end of the anchoring prestress (2) is anchored below the anchoring crossbeam (7). A frame connecting rod (6) and an anchor beam (7) are installed at the outlet of the anchoring duct (4) of the pier, and surround the perimeter of the bottom (10) of the pier. The wedge-shaped pad (5) is placed between the outlet of the anchoring hole (4) of the pier and the anchoring beam (7) to transfer the anchoring force to the pier.

2. The temporary anchoring device for cantilever demolition of block 0 of a continuous concrete beam according to claim 1, characterized in that, The upper end of the anchoring prestress (2) is anchored to the anchoring pad beam (1) by the prestressed anchor (3).

3. A temporary anchoring device for the cantilever removal of block 0 of a continuous concrete beam according to claim 1, characterized in that, The anchorage duct (4) is a hole drilled in the top plate, bottom plate and pier top (9) of the No. 0 block 8 of the box girder, which serves as a channel for the anchorage prestress (2) to pass through.

4. A temporary anchoring device for cantilever demolition of block 0 of a continuous concrete beam according to claim 1, characterized in that, The frame connecting rod (6) and the anchor beam (7) are welded together.

5. A temporary anchoring device for the cantilever demolition of block 0 of a continuous concrete beam according to claim 1, characterized in that, The wedge-shaped pad (5) is a UHPC material pad.

6. A temporary anchoring device for the cantilever demolition of block 0 of a continuous concrete beam according to claim 1, characterized in that, The wedge-shaped pad (5) has an inclined surface on one side, which can transmit force to the top of the pier (9) by means of the inclined surface.

7. A temporary anchoring device for the cantilever demolition of block 0 of a continuous concrete beam according to claim 1, characterized in that, The wedge-shaped pad (5) is cast using high-strength concrete.

8. A temporary anchoring device for the cantilever removal of block 0 of a continuous concrete beam according to claim 1, characterized in that, The anchoring beam (1) has a reserved hole in the middle for passing through the anchoring prestress (2).

9. A temporary anchoring device for the cantilever demolition of block 0 of a continuous concrete beam according to claim 1, characterized in that, The frame connecting rod (6) and the anchor beam (7) are connected by welding steel bars.

10. A temporary anchoring device for the cantilever demolition of block 0 of a continuous concrete beam according to claim 1, characterized in that, The anchoring prestress (2) is made of finely rolled threaded steel or steel strand.

Images