Bridge external prestressing reinforcing bar structure based on actual damage

Abstract

The utility model relates to the technical field of civil engineering, and discloses a bridge external prestressing reinforcement structure based on actual damage, which comprises an anchor backing plate, the inner wall of the anchor backing plate is detachably connected with an anchorage device, the inner wall of the anchorage device is in sliding connection with a protective shell, the inner wall of the protective shell is in sliding connection with a plurality of limiting balls, and the limiting balls are arranged on the inner wall of the protective shell. A wedge-shaped block is slidably connected to the inner wall of the protective shell, a pressure spring is fixedly connected to the top end of the wedge-shaped block, a rotating rod is fixedly connected to the other end of the pressure spring, external threads are arranged on the outer wall of the rotating rod, a control rod is fixedly connected to the outer wall of the protective shell, and a mounting plate is slidably connected to the outer wall of the protective shell. According to the detachable anchorage device, the detachable mechanism convenient to install is additionally arranged, so that the anchorage device can be detached in the using process, when the anchorage device goes wrong, the anchorage device can be detached, and workers can conveniently overhaul the anchorage device.

Description

TECHNICAL FIELD

[0001] The utility model relates to civil engineering technical field especially based on actual damage's bridge external prestress reinforcing structure. BACKGROUND

[0002] Bridge external prestress reinforcing structure is to apply prestressed reinforcement outside the bridge body, effectively improve the bearing capacity and stiffness of the bridge, reduce the structure deformation and crack. This technology is widely used in old bridge reinforcement reconstruction, improve the new bridge construction quality and prolong the service life, especially suitable for the bridge structure which needs to enhance the bending resistance and durability. Its construction is relatively simple, cost-effective, is one of the important reinforcement means in modern bridge engineering.

[0003] Bridge external prestress reinforcing structure is composed of prestressed cable, anchoring system and installation system. The prestressed cable generates counterbending moment through tension, offsets part of the external load internal force, improves the bearing capacity; the anchoring system realizes the installation and fixation of steel strand through the anchorage device fixed on the anchor pad; the installation system facilitates the installation of reinforcing structure and grouting reinforcement. In addition, the protective sleeve can protect the prestressed cable from corrosion and prolong the service life. These components work together to significantly improve the stiffness and durability of the bridge.

[0004] In the prior art, the anchorage device is generally directly fixed and installed on the outer wall of the anchor pad, which is inconvenient to disassemble, replace and overhaul when the anchorage device has problems, for example, the anchorage device fails due to cracks in the long-term use process, so that the steel strand cannot effectively offset the prestress. Therefore, the bridge external prestress reinforcing structure based on actual damage is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a bridge external prestress reinforcing structure based on actual damage, which aims to improve the problem that the anchorage device is inconvenient to disassemble, replace and overhaul when the anchorage device has problems in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The bridge external prestress reinforcing structure based on actual damage comprises an anchor pad, the inner wall of the anchor pad is detachably connected with an anchorage device, the inner wall of the anchorage device is slidably connected with a protective shell, the inner wall of the protective shell is slidably connected with a plurality of limiting balls, the inner wall of the protective shell is slidably connected with a wedge-shaped block, the top end of the wedge-shaped block is fixedly connected with a pressure spring, the other end of the pressure spring is fixedly connected with a rotating rod, the outer wall of the rotating rod is provided with external threads, the outer wall of the protective shell is fixedly connected with a control rod, and the outer wall of the protective shell is slidably connected with a mounting plate.

[0008] As a further description of the above technical solutions:

[0009] The outer wall of the mounting plate is fixedly connected to the outer wall of the anchor backing plate, and the outer wall of the anchor backing plate is fixedly connected with a wire bundling device;

[0010] As a further description of the above technical solutions:

[0011] The inner wall of the anchor is slidably connected with a plurality of steel wires, and the inner wall of the anchor is provided with a plurality of clamping pieces, and the outer wall of the steel wire is in contact with the inner wall of the plurality of clamping pieces;

[0012] As a further description of the above technical solutions:

[0013] The inner wall of the wire bundling device is slidably connected with a plurality of steel wires, and the outer wall of the wire bundling device is fixedly connected with a sleeve;

[0014] As a further description of the above technical solutions:

[0015] The outer wall of the sleeve is fixedly connected with a plurality of supporting steel bars, and the two ends of the supporting steel bars are fixedly connected with grouting blocks;

[0016] As a further description of the above technical solutions:

[0017] The outer wall of the sleeve is fixedly connected to the inner wall of the grouting block, and the outer wall of the grouting block is fixedly connected with a bridge fixing beam;

[0018] The utility model has the advantages of:

[0019] In the utility model, the protection shell and the internal components are inserted into the anchor, the protection shell and the internal components pass through the anchor, slide into the inside of the mounting plate, the control rod is rotated, the control rod drives the rotating rod to rotate, the rotating rod continuously moves downward, the downward movement of the rotating rod drives the compression spring and the wedge block to move downward, when the wedge block contacts the limiting ball, the limiting ball slides outward, and then is clamped in the corresponding slot of the mounting plate, the positioning and installation of the anchor are completed, when disassembling, the control rod is reversely rotated to make the limiting ball not clamped in the inside of the mounting plate, the protection shell and the internal components are pulled out, and the anchor is disassembled. DRAWINGS

[0020] Figure 1 A three-dimensional schematic view of the bridge external prestress reinforcing and reinforcing structure based on actual damage is provided for the utility model;

[0021] Figure 2 A structure schematic view of the bridge fixing beam of the bridge external prestress reinforcing and reinforcing structure based on actual damage is provided for the utility model;

[0022] Figure 3 The structural diagram of the wire binding device of the bridge external prestress reinforcement and reinforcement structure based on actual damage is provided in the utility model;

[0023] Figure 4 For Figure 3 The enlarged view of A in the middle;

[0024] Legend:

[0025] 1, anchor pad; 2, anchor; 3, mounting plate; 4, limiting ball; 5, wedge block; 6, pressure spring; 7, rotating rod; 8, external thread; 9, protective shell; 10, control rod; 11, clamping piece; 12, bridge fixed beam; 13, wire binding device; 14, supporting steel bar; 15, grouting block; 16, steel strand; 17, sleeve. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] With reference to Figures 2 to 4 An embodiment provided by the utility model: the bridge external prestress reinforcement and reinforcement structure based on actual damage, comprising an anchor pad 1, the anchor pad 1 is used to place an anchor 2, the inner wall of the anchor pad 1 is detachably connected with the anchor 2, the anchor 2 is used to be inserted into a steel strand 16, the inner wall of the anchor 2 is slidably connected with a protective shell 9, the protective shell 9 is used to protect the positioning installation assembly for realizing the detachability of the anchor 2, the inner wall of the protective shell 9 is slidably connected with a plurality of limiting balls 4, the limiting balls 4 are used to be clamped in the inner wall of the mounting plate 3, the inner wall of the protective shell 9 is slidably connected with a wedge block 5, the wedge block 5 is used to push the limiting ball 4 out of the protective shell 9, so that it is clamped into the inside of the mounting plate 3.

[0028] The top end of the wedge-shaped block 5 is fixedly connected with a pressure spring 6, which is used to provide pressure for the wedge-shaped block 5, so as to facilitate the wedge-shaped block 5 to better clamp the limiting ball 4. The other end of the pressure spring 6 is fixedly connected with a rotating rod 7. The rotating rod 7 is rotated to drive the pressure spring 6 and the wedge-shaped block 5 to move downward to allow the limiting ball 4 to be clamped into the inner wall of the mounting plate 3. The outer wall of the rotating rod 7 is provided with external threads 8. The outer wall of the protective shell 9 is fixedly connected with a control rod 10. The control rod 10 is rotated to drive the rotating rod 7 to rotate. The outer wall of the protective shell 9 is slidably connected with the mounting plate 3. The mounting plate 3 is used to install the anchorage device 2. The outer wall of the mounting plate 3 is fixedly connected to the outer wall of the anchor pad 1. The outer wall of the anchor pad 1 is fixedly connected with a wire binding device 13. The steel strand 16 is used to protect the bridge and resist the prestress inside the bridge.

[0029] Referring to Figures 1 to 3 The inner wall of the anchorage device 2 is slidably connected with a plurality of steel strands 16. The inner wall of the anchorage device 2 is provided with a plurality of clamping pieces 11. The clamping pieces 11 are fixed to the inner wall of the anchorage device 2 by frictional resistance of the steel strands 16. The outer wall of the steel strands 16 is in contact with the inner wall of the plurality of clamping pieces 11. The steel strands 16 are fixed by the frictional resistance between the clamping pieces 11 and the steel strands 16. The inner wall of the wire binding device 13 is slidably connected with a plurality of steel strands 16. The outer wall of the wire binding device 13 is fixedly connected with a sleeve 17. The sleeve 17 is used to bundle the internal steel strands 16 together.

[0030] The outer wall of the sleeve 17 is fixedly connected with a plurality of supporting steel bars 14. The supporting steel bars 14 facilitate the installation and fixation of the sleeve 17 and the steel strands 16. The two ends of the supporting steel bars 14 are fixedly connected with grouting blocks 15. The prestress protection assembly is fixed to the outside of the bridge by grouting. The outer wall of the sleeve 17 is fixedly connected to the inner wall of the grouting block 15. The outer wall of the grouting block 15 is fixedly connected with a bridge fixing beam 12.

[0031] Working principle: when the damaged bridge needs to be externally prestressed and reinforced, the supporting steel bars 14 are driven into the inside of the bridge fixing beam 12. Then the sleeve 17 is placed on the surface of the supporting steel bars 14. Then the anchor pad 1 is fixedly connected to the two side openings of the sleeve 17. Then the anchorage device 2 is placed outside the anchor pad 1. Then the protective shell 9 with the internal components is inserted into the inside of the anchorage device 2. The protective shell 9 with the internal components will pass through the anchorage device 2 and slide into the inside of the mounting plate 3. Then the control rod 10 is rotated to drive the rotating rod 7 to rotate. Due to the existence of the external threads 8, the rotating rod 7 will continuously move downward. The downward movement of the rotating rod 7 will drive the pressure spring 6 and the wedge-shaped block 5 to move downward. When the wedge-shaped block 5 contacts the limiting ball 4, the limiting ball 4 will slide outward and then be clamped into the corresponding groove of the mounting plate 3, completing the installation of the anchorage device 2.

[0032] When the anchor 2 is installed, the steel strand 16 is inserted into the opening of the anchor 2 on the other side through the mouth, and the sleeve 17 and the strand binder 13 ensure the running track of the steel strand 16 so that it will not deviate. After installation, the inside of the sleeve 17 is grouted through the opening on the surface of the anchor pad 1, thereby completing the reinforcement of the damaged bridge external prestress.

[0033] Finally, it should be noted that the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing detailed description of the present application is made with reference to the foregoing embodiments, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. Bridge external prestressed reinforcement structure based on actual damage, comprising an anchor pad (1), characterized in that: The inner wall of the anchor pad (1) is detachably connected with an anchor (2), the inner wall of the anchor (2) is slidably connected with a protective shell (9), the inner wall of the protective shell (9) is slidably connected with a plurality of limiting balls (4), the inner wall of the protective shell (9) is slidably connected with a wedge block (5), the top end of the wedge block (5) is fixedly connected with a pressure spring (6), the other end of the pressure spring (6) is fixedly connected with a rotating rod (7), the outer wall of the rotating rod (7) is provided with an external thread (8), the outer wall of the protective shell (9) is fixedly connected with a control rod (10), and the outer wall of the protective shell (9) is slidably connected with a mounting plate (3).

2. The actual damage based bridge externally prestressed reinforced structure of claim 1, wherein: The outer wall of the mounting plate (3) is fixedly connected to the outer wall of the anchor pad (1), and the outer wall of the anchor pad (1) is fixedly connected with a wire binder (13).

3. The actual damage based bridge externally prestressed reinforced structure of claim 1, wherein: The inner wall of the anchor (2) is slidably connected with a plurality of steel wires (16), and the inner wall of the anchor (2) is provided with a plurality of clamping pieces (11).

4. The actual damage based bridge externally prestressed reinforced structure of claim 2, wherein: The inner wall of the wire binder (13) is slidably connected with a plurality of steel wires (16), and the outer wall of the wire binder (13) is fixedly connected with a sleeve (17).

5. The actual damage based bridge externally prestressed reinforced structure of claim 4, wherein: The outer wall of the sleeve (17) is fixedly connected with a plurality of supporting steel bars (14), and the two ends of the supporting steel bar (14) are fixedly connected with a grouting block (15).

6. The actual damage based bridge externally prestressed reinforced structure of claim 5, wherein: The outer wall of the sleeve (17) is fixedly connected to the inner wall of the grouting block (15), and the outer wall of the grouting block (15) is fixedly connected with a bridge fixed beam (12). The outer wall of the sleeve (17) is fixedly connected to the inner wall of the grouting block (15), and the outer wall of the grouting block (15) is fixedly connected with a bridge fixed beam (12).

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