Device for preventing large longitudinal slope bridge support from disengaging
The adaptive wedge leveling device solved the problem of bearing separation on bridges with large longitudinal slopes, achieving uniform stress and tight fit between the beam and the bearing, extending the service life of the bearing, and ensuring the operational safety of the bridge.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-08
- Publication Date
- 2026-05-15
AI Technical Summary
Bridge bearings on steep longitudinal slopes are prone to detachment and uneven stress during use, which can lead to bearing failure and affect the service life and operational safety of the bridge.
An adaptive wedge leveling device is adopted, including an upper hinge leveling steel plate, a lower hinge leveling steel plate, and a middle sliding wedge block. Through the connection of steel wire rope and the wedge structure, uniform force and tight fit between the beam and the support are achieved, and the wedge self-locking structure is used to prevent separation.
It effectively prevents the separation of beams and bearings, ensures uniform load distribution on the bridge, extends the service life of the bearings, improves the operational safety of the bridge, and reduces the frequency of maintenance and replacement of the bearings.
Smart Images
Figure CN224243661U_ABST
Abstract
Description
Technical Field
[0001] This utility model patent relates to the field of bridge engineering construction technology, specifically a device for preventing the bearings of bridges with steep longitudinal slopes from becoming detached. Background Technology
[0002] Bridge bearings are crucial force-transfer devices that transfer the load borne by the superstructure of a bridge to the substructure, and their importance is self-evident. Previously, when installing bridge beams, the bearings were first placed on the bearing pads on the cap beam, and one or more steel plates were placed on the bearings to level them according to the longitudinal slope. Then, the beam was simply placed on the raised steel plates. However, this method was simplistic and crude, making it difficult for the bearings to fit snugly against the beam, resulting in uneven stress on the bearings. As bridges are put into operation, they are subjected to long-term loads from their own weight and passing vehicles, as well as adverse factors such as vibration, temperature changes, and longitudinal slope. Bridge bearings are more prone to slippage and detachment, leading to increasingly severe uneven stress on the bearings and resulting in shear failure and other defects. This is particularly evident in the shear failure caused by slippage of beams on steep longitudinal slopes, with some bridges even requiring large-scale bearing replacement within just six months of operation, affecting the overall service life and operational safety of the bridge. Therefore, there is an urgent need for a utility model of a device to prevent bridge bearings from coming loose on steep longitudinal slopes, in order to solve the problem of uneven stress and damage caused by bearings coming loose on bridges. Utility Model Content
[0003] This invention addresses the problem of frequent detachment and damage of bridge bearings on steep longitudinal slopes, which affects the service life and operational safety of bridges. It provides a device to prevent the detachment of bridge bearings on steep longitudinal slopes.
[0004] Compared with the prior art, the advantages of this utility model are: easy to manufacture and install, strong anti-slip and self-adaptive properties, good tightness of rigid structure and flexible contact surface, uniform stress distribution, long service life, and high safety.
[0005] To achieve the above objectives, this utility model employs the following technical solution:
[0006] A device for preventing bridge bearings from slipping off on steep longitudinal slopes includes an adaptive wedge leveling device. The adaptive wedge leveling device includes an upper hinge leveling steel plate, a lower hinge leveling steel plate, and an intermediate sliding wedge block sandwiched between the upper and lower hinge leveling steel plates. The upper hinge leveling steel plate is in contact with the beam, and the lower hinge leveling steel plate is in contact with the bearing. The upper and lower hinge leveling steel plates are rotatably connected by a rotating mechanism located at their near ends. The thinner end of the intermediate sliding wedge block is closer to the rotating mechanism than the thicker end. The thinner end of the intermediate sliding wedge block is connected to a cable pile on the bottom surface of the beam by passing a steel wire rope through the gap between the two near ends of the upper and lower hinge leveling steel plates.
[0007] Furthermore, as a preferred technical solution, a rope buckle is fixedly installed at the thin end of the middle sliding wedge block, one end of the wire rope is fixedly connected to the rope buckle, and the other end passes through the gap between the two ends of the upper hinge leveling steel plate and the lower hinge leveling steel plate, and is further connected to the bollard.
[0008] Furthermore, as a preferred technical solution, the bottom surface of the beam slab is a pre-embedded steel plate, and the cable piles are fixedly installed on the bottom surface of the pre-embedded steel plate.
[0009] Furthermore, as a preferred technical solution, the upper hinge leveling steel plate is bonded to the pre-embedded steel plate on the bottom surface of the beam by applying low-viscosity sealant, and the upper and lower surfaces of the support are bonded to the lower hinge leveling steel plate and the upper surface of the support pad stone by applying high-strength structural adhesive.
[0010] Furthermore, as a preferred technical solution, the size of the lower hinge leveling steel plate is such that it can at least cover the lower support.
[0011] Furthermore, as a preferred technical solution, the intermediate sliding wedge block includes a wedge-shaped empty box structure and a prefabricated wedge-shaped rubber block placed inside the wedge-shaped empty box structure. The slope of the wedge-shaped rubber block and the wedge-shaped empty box is the same as the slope of the bridge section.
[0012] Furthermore, as a preferred technical solution, a circular sand cylinder support is also included, which is placed on the cap beam at the corresponding positions below both ends of the beam slab and temporarily supports the beam slab.
[0013] Furthermore, as a preferred technical solution, the number of circular sand cylinder supports corresponding to a single beam is 4, with 2 at each end of the beam.
[0014] Furthermore, as a preferred technical solution, the circular sand cylinder support includes an upper circular sand cylinder and a lower circular sand cylinder. The upper circular sand cylinder is placed inside the lower circular sand cylinder, and a pin hole is opened at the lower end of the lower circular sand cylinder. A movable pin is provided in the pin hole to seal it.
[0015] Compared with existing technologies, this invention has the following advantages and beneficial effects: strong anti-slip and self-adaptive properties, good tightness of the rigid structure and flexible contact surface, uniform stress distribution, long service life of the bearing, and high safety. When the bridge beam is under its own weight and long-term vibration, it presses against the upper hinge leveling steel plate on one hand, and on the other hand, it tends to slide downwards along the bridge slope, pulling the middle sliding wedge block and further compacting the upper and lower hinge leveling steel plates, creating a tightening effect. This wedge-shaped "self-locking" leveling structure ensures that the load on the upper part of the bridge is evenly transferred to the bearing, preventing local separation of the beam and bearing. The bearing will not fail prematurely due to uneven stress, thus extending the service life of the bridge bearing, ensuring the overall operational safety of the bridge, and saving significant costs associated with replacing and repairing bearings during the operational period. Attached Figure Description
[0016] Figure 1 This is a side view of the present invention;
[0017] Figure 2 This is a top view of the present invention;
[0018] Figure 3 This is a schematic diagram of an adaptive wedge leveling device;
[0019] Figure 4 This is a schematic diagram of the middle wedge block;
[0020] Figure 5 This is a schematic diagram of a circular sand cylinder;
[0021] In the diagram, 1-Adaptive wedge leveling device; 11-Upper hinge leveling steel plate; 12-Lower hinge leveling steel plate; 13-Intermediate sliding wedge block; 131-Slender end; 132-Rough end; 133-Hanging buckle; 134-Wedge rubber block; 14-Rotating mechanism; 15-Wire rope; 16-Low-viscosity sealant; 17-High-strength structural adhesive; 18-Gap area; 2-Beam plate; 21-Cable bollard; 22-Embedded steel plate; 3-Support; 4-Circular sand cylinder support; 41-Upper circular sand cylinder; 42-Lower circular sand cylinder; 421-Pin hole; 422-Modible pin; 5-Cap beam. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] like Figure 1 , 3As shown in Figure 4, a device for preventing bridge bearings from slipping off due to steep longitudinal slopes includes an adaptive wedge leveling device 1. The adaptive wedge leveling device 1 includes an upper hinge leveling steel plate 11, a lower hinge leveling steel plate 12, and an intermediate sliding wedge block 13 sandwiched between the upper hinge leveling steel plate 11 and the lower hinge leveling steel plate 12. The upper hinge leveling steel plate 11 is in contact with the beam slab 2, and the lower hinge leveling steel plate 12 is in contact with the bearing 3. The upper hinge leveling steel plate 11 and the lower hinge leveling steel plate 12 are rotatably connected by a rotating mechanism 14 located at their close ends. The thin end 131 of the intermediate sliding wedge block 13 is closer to the rotating mechanism 14 than the thick end 132. The thin end 131 of the intermediate sliding wedge block 13 is connected to the cable pile 21 on the bottom surface of the beam slab 2 by passing through the gap between the two close ends of the upper hinge leveling steel plate 11 and the lower hinge leveling steel plate 12 with a steel wire rope 15. After the bridge beam 2 is installed, under the action of the beam's own weight and the bridge deck load, on the one hand, a force is generated diagonally downward along the bridge slope. This diagonal downward force causes the steel wire rope 15 at the bottom of the beam 2 to pull the middle sliding wedge block 13 towards its narrow end 131 (the "small head" of the wedge block), so that the middle sliding wedge block 13 and the upper and lower hinge leveling steel plates become increasingly tightly fitted. On the other hand, a force perpendicular to the upper hinge leveling steel plate 11 is generated, so that the upper and lower hinge leveling steel plates and the middle wedge block 13 are pressed tighter and tighter, and the upper load of the bridge is evenly converted into positive pressure on the supports and substructure. The beam 2 will not be locally detached, and the supports 3 will not fail prematurely due to uneven stress. This wedge self-locking structure achieves adaptive wedge leveling. The intermediate sliding wedge block 13 is sandwiched between the upper hinge leveling steel plate 11 and the lower hinge leveling steel plate 12, which relatively fixes the position of the intermediate sliding wedge block 13. It is also connected and fixed to the beam plate by a steel wire rope, so that the leveling steel plate will not shift its position or even fall off the support due to the continuous vibration of the beam plate, as is the case in the prior art.
[0024] A rope buckle 133 is fixedly installed at the narrow end 131 of the intermediate sliding wedge block 13. One end of the steel wire rope 15 is fixedly connected to the rope buckle 133, and the other end passes through the gap between the two ends of the upper hinge leveling steel plate 11 and the lower hinge leveling steel plate 12, and is further connected to the bollard 21. The bottom surface of the beam slab 2 is a pre-embedded steel plate 22, and the bollard 21 is fixedly installed on the bottom surface of the pre-embedded steel plate 22. The upper hinge leveling steel plate 11 and the pre-embedded steel plate 22 on the bottom surface of the beam slab 2 are bonded by applying low-viscosity sealant 16. The upper and lower surfaces of the support 3 are bonded to the lower hinge leveling steel plate 12 and the upper surface of the support pad stone, respectively, by applying high-strength structural adhesive 17. The bollard 21 is made of a 32mm diameter steel bar, 5-8cm long, with a tie. It can be pre-embedded in the beam slab 2 or welded to the pre-embedded steel plate 22 of the beam slab 2. The pre-embedded steel plate 22 of the beam slab 2 is a steel plate with a thickness between 6mm and 10mm. The upper hinge leveling steel plate 11 is bonded to the bottom surface of the beam slab 2 by applying 3-5mm of low-viscosity sealant 16. Its main function is to make the components fit flexibly, increase the flatness between them, and achieve the effect of uniform stress. The lower surface of the support 3 is bonded to the support pad stone by applying 3-5mm of high-strength structural adhesive 17. Its function is to increase the flexible connection and flatness of the components, and also to fix the position.
[0025] The size of the lower hinge leveling steel plate 12 is such that it can at least cover the support 3 below. The purpose of this setting is to ensure that there is no gap between the support 3 and the beam 2, and to ensure that the weight of the beam 2 can be smoothly and evenly transferred to the support 3.
[0026] The intermediate sliding wedge block 13 includes a wedge-shaped empty box structure and a prefabricated wedge-shaped rubber block 134 placed inside the wedge-shaped empty box structure. The slope of the wedge-shaped rubber block 134 and the wedge-shaped empty box is the same as the slope of this section of the bridge. The outer wedge-shaped empty box of the middle sliding wedge block 13 can be made of rigid material, such as steel. Its inclination can be designed to match the actual longitudinal slope. The empty box contains a rubber block with a slightly larger volume and the same slope, so that the subsequent beam plate 2, upper hinge leveling steel plate 11, middle sliding wedge block 13, lower hinge leveling steel plate 12, and support 3 can fit tightly and flat in sequence. Among them, the middle sliding wedge block 13 is a semi-rigid and semi-flexible structure with a steel box nested with a rubber block. The rubber is appropriately compressible but has a certain degree of hardness. It can be stuck in the wedge-shaped empty box and will not move at will. Its inclination is also designed according to the bridge slope. The subsequent beam plate 2 presses on the adaptive wedge leveling device 1, realizing a rigid yet flexible fit, so that the beam plate 2, upper hinge leveling steel plate 11, middle sliding wedge block 13, lower hinge leveling steel plate 12, and support 3 can fit more tightly and flat in sequence.
[0027] like Figure 5As shown, it also includes circular sand cylinder supports 4, which are placed on the cap beams 5 at corresponding positions below both ends of the beam slab 2, and temporarily support the beam slab 2. There are four circular sand cylinder supports 4 corresponding to a single beam slab 2, with two at each end of the beam slab 2. The circular sand cylinder support 4 includes an upper circular sand cylinder 41 and a lower circular sand cylinder 42. The upper circular sand cylinder 41 is placed inside the lower circular sand cylinder 42. The lower end of the lower circular sand cylinder 42 has a pin hole 421, in which a movable pin 422 is installed to seal it. The height of the circular sand cylinder support 4 is an appropriate distance above the support 3. Both the upper and lower circular sand cylinders 41 and 4 are filled with sand, serving as temporary supports for the beam slab 2. This facilitates adjusting the support position of the support 3 and precisely installing the adaptive wedge leveling device 1. One or two steel plates can be temporarily placed on the upper part of the upper circular sand cylinder 41 as needed on site to increase its fit with the beam slab 2. After the adaptive wedge leveling device 1 is installed on the support 3, the movable pin 422 of the circular sand cylinder support 4 is pulled out, and the sand in the sand cylinder is slowly released. The height of the sand layer in the lower circular sand cylinder 42 decreases, and the height of the upper circular sand cylinder 41 also decreases accordingly. As a result, the beam 2 will fall smoothly on the adaptive wedge leveling device 1. This eliminates the need to frequently use a truck crane to adjust the position of the beam, which can save a lot of truck crane shift costs.
[0028] Before construction, based on the bearing positions, area, bridge slope, and other factors in the drawings, prepare a suitable adaptive leveling device 1. Apply high-strength structural adhesive 17 to the upper and lower surfaces of the bearing 3. Place the bearing 3 on the bearing pad stone and place the adaptive wedge leveling device 1 on the bearing 3. Then, place a circular sand cylinder support 4 at an appropriate position on the cap beam 5, with the circular sand cylinder support 4 being a suitable distance above the bearing 3. Use a truck crane to place the beam 2 on the circular sand cylinder support 4, and then remove the truck crane, leaving the circular sand cylinder support 4 to temporarily support the beam 2. Simultaneously, according to the design drawings, workers begin to install the pre-embedded steel plate 22 at appropriate positions at the bottom of the beam 2. Place the welded steel bar cable pile 21, apply low-viscosity sealant 16 to the upper surface of the upper hinge leveling steel plate 11, and push the middle sliding wedge block 13 between the upper and lower hinge leveling steel plates 11 and 12 until it is located directly above the support. Then connect the steel wire rope 15 and the cable pile 21 through the rope buckle 133 and tighten the steel wire rope 15. In the subsequent beam lowering, finely adjust the length of the steel wire rope 15 and the position of the middle sliding wedge block 13 to ensure that the steel wire rope 15 is tightened. At this time, the adaptive wedge leveling device 1 and the beam body of the beam slab 2 form an integral whole. Then open the movable pin 422 of the circular sand cylinder support 4 and gradually release the sand until the beam slab is lowered smoothly.
Claims
1. A device for preventing bridge bearings from becoming detached on steep longitudinal slopes, characterized in that, The device includes an adaptive wedge leveling device (1), which comprises an upper hinge leveling steel plate (11), a lower hinge leveling steel plate (12), and an intermediate sliding wedge block (13) sandwiched between the upper hinge leveling steel plate (11) and the lower hinge leveling steel plate (12). The upper hinge leveling steel plate (11) is in contact with the beam plate (2), and the lower hinge leveling steel plate (12) is in contact with the support (3). The upper hinge leveling steel plate (11) and the lower hinge leveling steel plate (12) are in contact with each other. 2) Rotary connection is achieved by a rotating mechanism (14) located at the ends of the two objects. The thin end (131) of the intermediate sliding wedge block (13) is closer to the rotating mechanism (14) than the thick end (132). The thin end (131) of the intermediate sliding wedge block (13) is connected to the cable pile (21) on the bottom surface of the beam plate (2) by passing through the gap between the two ends of the upper hinge leveling steel plate (11) and the lower hinge leveling steel plate (12) via a steel wire rope (15).
2. The device for preventing bridge bearings from slipping off on steep longitudinal slopes as described in claim 1, characterized in that, The thin end (131) of the intermediate sliding wedge block (13) is fixedly provided with a rope buckle (133). One end of the wire rope (15) is fixedly connected to the rope buckle (133), and the other end passes through the gap between the two ends of the upper hinge leveling steel plate (11) and the lower hinge leveling steel plate (12) that are close to each other, and is further connected to the bollard (21).
3. The device for preventing bridge bearings from slipping off on steep longitudinal slopes as described in claim 2, characterized in that, The bottom surface of the beam (2) is a pre-embedded steel plate (22), and the cable pile (21) is fixedly installed on the bottom surface of the pre-embedded steel plate (22).
4. The device for preventing bridge bearings from slipping off on steep longitudinal slopes as described in claim 3, characterized in that, The upper hinge leveling steel plate (11) is bonded to the pre-embedded steel plate (22) on the bottom surface of the beam plate (2) by applying low-viscosity sealant (16), and the upper and lower surfaces of the support (3) are bonded to the lower hinge leveling steel plate (12) and the upper surface of the support pad stone by applying high-strength structural adhesive (17).
5. A device for preventing bridge bearings from slipping off on steep longitudinal slopes as described in any one of claims 1-4, characterized in that, The size of the lower hinge leveling steel plate (12) is such that it can at least cover the support (3) below.
6. A device for preventing bridge bearings from slipping off on steep longitudinal slopes as described in any one of claims 1-4, characterized in that, The intermediate sliding wedge block (13) includes a wedge-shaped empty box structure and a prefabricated wedge-shaped rubber block (134) placed inside the wedge-shaped empty box structure. The slope of the wedge-shaped rubber block (134) and the wedge-shaped empty box is the same as the slope of the bridge section.
7. A device for preventing bridge bearings from slipping off on steep longitudinal slopes as described in any one of claims 1-4, characterized in that, It also includes a circular sand cylinder support (4), which is placed on the cap beam (5) at the corresponding positions below both ends of the beam plate (2) and temporarily supports the beam plate (2).
8. The device for preventing bridge bearings from slipping off on steep longitudinal slopes as described in claim 7, characterized in that, The number of circular sand cylinder supports (4) corresponding to a single beam plate (2) is 4, with 2 supports at each end of the beam plate (2).
9. A device for preventing bridge bearings from slipping off on steep longitudinal slopes as described in claim 8, characterized in that, The circular sand cylinder support (4) includes an upper circular sand cylinder (41) and a lower circular sand cylinder (42). The upper circular sand cylinder (41) is placed inside the lower circular sand cylinder (42). The lower circular sand cylinder (42) has a pin hole (421) at its lower end. A movable pin (422) that can seal the hole is provided in the pin hole (421).