Anti-pulling pin anti-overturning device for single-column pier bridge

Abstract

The utility model relates to an anti-pulling pin anti-overturning device for a single-column pier bridge, and belongs to the technical field of bridge reinforcement. The anti-overturning device for the anti-pulling pin of the single-column pier bridge comprises a fixing part which is arranged on a single-column pier in a sleeving manner; the anti-overturning part comprises a mounting base, a support and a supporting base used for fixing the bottom face of the bridge, the mounting base is fixedly arranged on the fixing part, the support is rotationally connected with the mounting base through a first rotating shaft, the supporting base is rotationally connected with the support through a second rotating shaft, and the axial direction of the first rotating shaft is parallel to the axis of the second rotating shaft; the stiffening rib is rotatably arranged on the support, and the axis of the stiffening rib is perpendicular to the axis of the single-column pier. According to the scheme provided by the utility model, the supporting end points of the supporting seat in the width direction of the bridge floor can be adjusted to be matched with various different bridge floor widths, the structural stress of the single-column pier bridge is optimized, and the operation safety of the single-column pier bridge is ensured.

Description

Technical Field

[0001] This utility model relates to the field of bridge reinforcement technology, and in particular to a device for preventing pull-out pins and overturning of single-column pier bridges. Background Technology

[0002] Single-column pier bridges are widely used in urban bridges and highway interchange ramps due to their advantages such as small clearance requirements, simple and streamlined design, aesthetic appeal, strong adaptability, and good economy. However, with my country's rapid economic development and the continuous increase in traffic volume and vehicle load, overloaded and misaligned vehicles have led to numerous overturning accidents on single-column pier bridges. To take effective remedial measures, my country is reinforcing a large number of single-column pier bridges to improve their overturning resistance. However, when using existing single-column piers for under-bridge support, sometimes the distance between the piers and the bridge deck is too long, resulting in limited support capacity and insufficient support for the two ends. This leads to excessive pressure at the ends, causing the bridge to overturn and resulting in irreversible damage, seriously affecting road safety. Utility Model Content

[0003] To overcome the problems existing in related technologies, this utility model provides an anti-uplift pin and anti-overturning device for single-column pier bridges, which can adjust the support end point of the support seat in the width direction of the bridge deck to match various bridge deck widths, optimize the structural stress of single-column pier bridges, and ensure the operational safety of single-column pier bridges.

[0004] This utility model provides a device for anti-uplift and anti-overturning pins for single-column pier bridges, including a fixing part that is sleeved on the single-column pier;

[0005] The anti-overturning part includes a mounting base, a bracket, and a support base for fixing the bottom surface of the bridge. The mounting base is fixed on the fixing part. The bracket is rotatably connected to the mounting base through a first rotating shaft. The support base is rotatably connected to the bracket through a second rotating shaft. The axial direction of the first rotating shaft is parallel to the axis of the second rotating shaft.

[0006] The stiffening rib is rotatably mounted on the support, and the axis of the stiffening rib is perpendicular to the axis of the single-column pier.

[0007] In some embodiments, the stiffening rib includes a threaded ring, a screw, and two opposing rotating rods. The screw is threadedly engaged with the threaded ring, the threaded ring is located between the two rotating rods and is rotatably connected to the rotating rods, the rotating rods are connected to a bracket, and the axis of the screw is perpendicular to the axis of the single-column pier.

[0008] In some embodiments, the support base includes a support plate, a fixing plate, and bolts. The support plate is disposed on the outer periphery of the second rotating shaft along the axial direction of the second rotating shaft, and the fixing plate is disposed on the support plate. The fixing plate is provided with mounting holes for the bolts to pass through.

[0009] In some embodiments, the fixing part includes two semi-circular clamps that are tightly fastened to the single pier, and the mounting seat is fixed on the semi-circular clamps.

[0010] In some embodiments, the bracket, threaded ring, screw, and rotating rod are all made of steel.

[0011] In some embodiments, the semi-circular clamp, mounting base, and support base are all made of UHPC material and filled with reinforcing bars and steel fibers.

[0012] In some embodiments, the steel fiber has a diameter of 0.2 to 0.5 mm and a length of 15 to 30 mm.

[0013] In some embodiments, the two semi-circular clamps and the mounting base are integrally formed.

[0014] In some embodiments, the semi-circular clamp, mounting base, and support base are all made of steel, the two semi-circular clamps are fixed by bolts, the semi-circular clamp and the mounting base are integrally formed, and the second rotating shaft and the support base are integrally formed.

[0015] The technical solution provided by this utility model can include the following beneficial effects:

[0016] The anti-uplift and anti-overturning device for single-column pier bridges provided by this utility model consists of a single-column pier, a bridge deck, and a support forming a triangular installation structure. The angle between the single-column pier and the support is adjusted by a first rotating shaft, and the angle between the support and the bridge deck is adjusted by a second rotating shaft. This allows the support base to be fixed to the bridge deck along the width direction under the action of the second rotating shaft. The support endpoints can be selected at different positions according to the width of the bridge deck, thereby improving the anti-overturning strength of the single-column pier bridge. Attached Figure Description

[0017] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components.

[0018] Figure 1 This is a schematic diagram of the anti-uplift pin and anti-overturning device for a single-column pier bridge shown in Embodiment 1 of this utility model;

[0019] Figure 2 This is a three-dimensional schematic diagram of the anti-uplift pin and anti-overturning device for a single-column pier bridge shown in Embodiment 1 of this utility model;

[0020] Figure 3 This is an exploded schematic diagram of the anti-uplift pin and anti-overturning device for a single-column pier bridge shown in Embodiment 1 of this utility model;

[0021] Figure 4 This is a schematic diagram of the stiffening rib structure shown in Embodiment 1 of this utility model;

[0022] Figure 5 This is a schematic diagram of another anti-uplift pin and anti-overturning device for a single-column pier bridge, as shown in Embodiment 2 of this utility model.

[0023] Figure label:

[0024] 1. Fixing part; 10. Semi-circular clamp;

[0025] 2. Anti-overturning component; 20. Mounting base; 21. Bracket; 22. Support base; 220. Support plate; 221. Fixing plate; 222. Bolt; 23. First rotating shaft; 24. Second rotating shaft;

[0026] 3. Stiffening ribs; 30. Threaded ring; 31. Screw; 32. Rotating rod;

[0027] 10. Single-column pier; 20. Bridge deck. Detailed Implementation

[0028] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0029] The technical solutions of the embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0030] Example 1

[0031] like Figures 1 to 4 As shown, this utility model provides an anti-uplift pin and anti-overturning device for a single-column pier bridge, including a fixing part 1, which is sleeved on the single-column pier 10;

[0032] The anti-overturning part 2 includes a mounting base 20, a bracket 21, and a support base 22 for fixing the bottom surface of the bridge. The mounting base 20 is fixed on the fixing part 1. The bracket 21 is rotatably connected to the mounting base 20 through a first rotating shaft 23. The support base 22 is rotatably connected to the bracket 21 through a second rotating shaft 24. The axial direction of the first rotating shaft 23 is parallel to the axis of the second rotating shaft 24. The stiffening rib 3 is rotatably mounted on the bracket 21. The axis of the stiffening rib 3 is perpendicular to the axis of the single-column pier 10.

[0033] In a preferred embodiment, the stiffening rib 3 includes a threaded ring 30, a screw 31, and two opposing rotating rods 32. The screw 31 is threadedly engaged with the threaded ring 30. The threaded ring 30 is located between the two rotating rods 32 and is rotatably connected to the rotating rods 32. The rotating rods 32 are connected to the bracket 21. The axis of the screw 31 is perpendicular to the axis of the single-column pier 10.

[0034] Furthermore, the aforementioned support base 22 includes a support plate 220, a fixing plate 221, and bolts 222. The support plate 220 is arranged along the axial direction of the second rotating shaft 24 on the outer periphery of the second rotating shaft 24. The fixing plate 221 is arranged on the support plate 220, and the fixing plate 221 is provided with mounting holes for the bolts 222 to pass through.

[0035] Furthermore, the aforementioned fixing part 1 includes two semi-circular clamps 10 tightly fastened to the single bridge pier, and the mounting seat 20 is fixed on the semi-circular clamps 10.

[0036] Furthermore, the aforementioned bracket 21, threaded ring 30, screw 31, and rotating rod 32 are all made of steel.

[0037] Furthermore, the aforementioned semi-circular clamp 10, mounting base 20, and support base 22 are all made of steel. The two semi-circular clamps 10 are fixed by bolts 222. The semi-circular clamp 10 and the mounting base 20 are integrally formed, and the second rotating shaft 24 and the support base 22 are integrally formed.

[0038] A ring-shaped clamp is used to reinforce the upper part of the single-column pier 10. The anti-overturning part 2 is connected to the fixed bridge deck 20. The anti-overturning effect is achieved by stiffening ribs 3, which share part of the force between the mounting seat 20 and the fixed part 1, thus preventing the pier from being subjected to the force of the cantilever bridge body under the action of overturning bending moment. The support seat 22 and the bracket 21, as well as the bracket 21 and the mounting seat 20, are rotatably connected, which can meet the installation requirements of multiple angles. The support seats 22 are adaptively installed on both sides according to the width of the bridge deck 20, which can improve the support and enhance the anti-overturning capacity when the bridge overturns. The bracket 21, the single-column pier 10 and the bridge deck 20 form a triangular structure, in which the bracket 21 is the hypotenuse. Increasing the distance between the center line of the bracket 21 and the single-column pier 10 increases the lever arm, which can provide a greater anti-overturning moment under the same tension. When the bridge deck 20 overturns, the diagonal brace on the overturning side provides pressure and the diagonal brace on the other side provides tension, which can effectively improve the overall anti-overturning capacity and the structural strength of the device.

[0039] It should be noted that the purpose of stable connection and reinforcement is achieved by using the inner wall shape of the semi-circular clamp 10 to fit the surface of the single column pier 10. Therefore, its overall shape is compatible with the shape of the single column pier 1 and is not limited to the shape shown in this utility model. However, the connection method and effect are the same, so it will not be described in detail.

[0040] Compared with the prior art, the anti-uplift and anti-overturning device for single-column pier bridge provided by this utility model, through the bracket 21 of the inclined support device and the stiffening rib 3 set perpendicular to the single-column pier 10, is beneficial to the resistance force generated by the inclined support, and the stiffening rib 3 shares part of the resistance force, which can improve the anti-overturning performance of the device. Furthermore, by using different inclined support angles, it can be adapted to various bridge deck 20 widths.

[0041] Example 2

[0042] like Figure 5 As shown, this embodiment only describes the differences from Embodiment 1, and the remaining technical features are the same as those in the above embodiments.

[0043] In this embodiment, the semi-circular clamp 10, mounting base 20 and support base 22 are all made of UHPC material and filled with steel bars and steel fibers.

[0044] Furthermore, the diameter of the steel fibers is 0.2–0.5 mm and the length is 15–30 mm.

[0045] Furthermore, the two semi-circular clamps 10 and the mounting base 20 mentioned above are integrally formed structures.

[0046] When applying this technical solution, a prefabricated mold shell is first installed on the single-column pier 10. The prefabricated mold cavity is symmetrically arranged on the left and right sides along the axial direction of the first rotating shaft 23. Several steel bars can be pre-installed on the single-column pier 10 to improve the connection strength between the fixing part 1 and the single-column pier 10 and prevent the fixing plate 221 from slipping after molding. The prefabricated mold cavity is provided with a chamber for molding the fixing part 1 and the mounting seat 20. Several steel bars are overlapped in the chamber. The prefabricated mold cavity is also provided with a cavity for inserting the first rotating shaft 23. When the UHPC material is stirred, steel fibers with a wire diameter of 0.2 to 0.5 mm and a wire length of 15 to 30 mm are added. The volume parameter of the steel fibers is ≥2.0%. The axial tensile strength of the UHPC material is above 10.0 MPa, the axial tensile ultimate strain is above 0.2%, and the compressive strength is above 150 MPa. Using UHPC material incorporating steel fibers can greatly enhance the strength and toughness of the fixing part 1 and the mounting base 20. After the UHPC material is poured into the precast mold cavity, the first rotating shaft 23, bracket 21, support base 22 and stiffening rib 3 can be installed after the ultra-high performance concrete has hardened.

[0047] Compared with the existing technology, the main material of the anti-uplift and anti-overturning device for the single-column pier bridge is made of ultra-high performance concrete (UHPC), which has the characteristics of being lightweight and high-strength. It has advantages such as being cast in place, being quick and convenient to construct, and having prefabricated templates that can be recycled.

[0048] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A device for preventing uplift and overturning of a single-column pier bridge, characterized in that, include: The fixing part is fitted onto the single-column pier; The anti-overturning part includes a mounting base, a bracket, and a support base for fixing the bottom surface of the bridge. The mounting base is fixed on the fixing part. The bracket is rotatably connected to the mounting base through a first rotating shaft. The support base is rotatably connected to the bracket through a second rotating shaft. The axial direction of the first rotating shaft is parallel to the axis of the second rotating shaft. The stiffening rib is rotatably mounted on the support, and the axis of the stiffening rib is perpendicular to the axis of the single-column pier.

2. The anti-uplift pin and anti-overturning device for single-column pier bridges according to claim 1, characterized in that, The stiffening rib includes a threaded ring, a screw, and two opposing rotating rods. The screw is threadedly engaged with the threaded ring, the threaded ring is located between the two rotating rods and is rotatably connected to the rotating rods, the rotating rods are connected to the bracket, and the axis of the screw is perpendicular to the axis of the single-column pier.

3. The anti-uplift pin and anti-overturning device for single-column pier bridges according to claim 2, characterized in that, The support base includes a support plate, a fixing plate, and bolts. The support plate is arranged along the axial direction of the second rotating shaft on the outer periphery of the second rotating shaft. The fixing plate is arranged on the support plate and has mounting holes for bolts to pass through.

4. The anti-uplift pin and anti-overturning device for single-column pier bridges according to claim 3, characterized in that, The fixing part includes two semi-circular clamps that are tightly fastened to the single pier, and the mounting seat is fixed on the semi-circular clamps.

5. The anti-uplift and anti-overturning device for single-column pier bridges according to claim 4, characterized in that, The bracket, threaded ring, screw, and rotating rod are all made of steel.

6. The anti-uplift pin and anti-overturning device for single-column pier bridges according to claim 5, characterized in that, The semi-circular clamp, mounting base, and support base are all made of UHPC material and filled with steel bars and steel fibers.

7. The anti-uplift pin and anti-overturning device for single-column pier bridges according to claim 6, characterized in that, The steel fibers have a diameter of 0.2–0.5 mm and a length of 15–30 mm.

8. The anti-uplift pin and anti-overturning device for single-column pier bridges according to claim 7, characterized in that, The two semi-circular clamps and the mounting base are integrally formed.

9. The anti-uplift pin and anti-overturning device for single-column pier bridges according to claim 5, characterized in that, The semi-circular clamp, mounting base, and support base are all made of steel. The two semi-circular clamps are fixed by bolts. The semi-circular clamp and mounting base are integrally formed. The second rotating shaft and support base are integrally formed.

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