Bridge expansion device capable of achieving transverse displacement function
By designing a bridge telescopic device that can achieve lateral displacement, the combination of rolling bearings and slip rails solves the problem of excessive displacement of the bridge in extreme environments, realizes the stability and safety of the device, reduces maintenance costs and extends service life.
Patent Information
- Application Number
- CN202422288460.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-19
AI Technical Summary
The existing bridge expansion device cannot adapt to excessive displacement in extreme environments, resulting in damage to the device and high maintenance costs, affecting traffic safety.
A bridge expansion device including movable plate, displacement bolt, rolling bearing, displacement box, support, fixing plate and ball is designed. The lateral displacement of the displacement box is achieved through rolling bearings and sliding tracks, and combined with buffer rubber and limiting structure, ensuring the stability and safety of the device in extreme environments.
In extreme environments, the bridge expansion device can adapt to excessive displacement, reduce device damage, extend service life, reduce maintenance costs, and improve traffic safety.
Smart Images
Figure CN223061440U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge engineering, and particularly relates to a bridge expansion device capable of realizing the function of lateral displacement. Background Art
[0002] With the rapid development of expressways, bridge construction is increasing in special geographical locations such as across rivers, seas, canyons, and seismic zones. With the continuous improvement of bridge construction technology, in mountainous areas and coastal areas in the southeast of China, due to the restriction of special geographical environment and limited construction operation surfaces, it is necessary to build extra-large and long-span bridges to meet the crossing requirements.
[0003] At present, the expansion devices for long-span bridges can be divided into two categories. One is the modular bridge expansion device, and the second is the comb-tooth plate type expansion device. The modular expansion device consists of middle beams, side beams, supporting cross beams, and bearing supports. The modular expansion device is of an integral structure, and the middle beam steel is arranged in a continuous length and is as wide as the bridge deck. When typhoons, hurricanes, or earthquakes occur, the bridge will generate lateral displacement and rotation. When a large displacement occurs in the horizontal direction, since each component of the expansion device is rigidly connected, the middle beam steel and the supporting cross beam will break and be damaged. Once some of the supporting cross beams or the middle beam steel break or fail, the entire expansion device must be replaced, resulting in a high maintenance cost. In addition, all traffic needs to be interrupted, and the social impact is poor. The rubber water stop of the modular expansion device is exposed to natural conditions and is prone to water accumulation and damage. The second type is the comb-tooth plate type expansion device, which consists of a movable plate, a fixed plate, a displacement structure, and installation bolts. When the beam body is affected by hurricanes, typhoons, earthquakes, etc., the beam body will have a large lateral displacement. The installation bolts anchor the device as a whole from top to bottom, and the device cannot meet the requirements in extreme environments, that is, it cannot solve the problem of excessive displacement of the bridge expansion device in extreme environments. Summary of the Utility Model
[0004] The utility model provides a bridge expansion device capable of realizing the function of lateral displacement to solve the above problems existing in the prior art, that is, the problem of excessive displacement of the bridge expansion device in extreme environments in the prior art.
[0005] The utility model provides a bridge expansion device capable of realizing the function of lateral displacement. The expansion device is located between the steel beam body and the concrete beam, and the device includes a movable plate, displacement bolts, rolling bearings, a displacement box, a support member, installation bolts, a fixed plate, and ball bearings.
[0006] The displacement box is horizontally fixed to one side of the vertical surface of the steel beam body through the support member.
[0007] A movable plate is arranged above the displacement box, and ball bearings are arranged on both side plates.
[0008] One side of the displacement bolt is fixedly connected to the movable plate, and the other side is connected to the rolling bearing inside the displacement box;
[0009] The inside of the displacement box is provided with a sliding track, and the sliding track is used to realize the lateral displacement of the displacement box;
[0010] A fixed plate is horizontally arranged on the right side of the movable plate, and the fixed plate is connected to the embedded steel bars through mounting bolts.
[0011] Optionally, C50 concrete is poured in the groove area of the fixed plate.
[0012] Optionally, a lateral displacement groove is arranged at the bottom of the movable plate, and shock-absorbing rubber is arranged in the lateral displacement groove for shock absorption and noise reduction.
[0013] Optionally, limits are arranged at both ends of the lateral displacement groove for restricting the sliding length of the displacement box.
[0014] Optionally, the displacement box realizes lateral displacement through the sliding of the rolling bearing on the sliding track and the rolling of the ball.
[0015] Optionally, the sliding track is a double sliding track.
[0016] Optionally, buffer rubber is arranged between the displacement box and the movable plate, and between the steel beam body and the movable plate.
[0017] Compared with the prior art, the beneficial effect of the present utility model is that when the steel beam body is affected by hurricanes, typhoons, and earthquakes, the beam body will have a large lateral displacement. The steel beam body drives the support member, and the rolling of the ball and the bearing drives the displacement box to move laterally, so that the bridge expansion device can adapt to excessive displacement in extreme environments. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing the embodiments in line with the present utility model, and are used together with the specification to explain the principles of the present utility model.
[0019] Figure 1 It is a longitudinal sectional schematic view of a bridge expansion device capable of realizing the lateral displacement function provided by the present utility model.
[0020] Through the above accompanying drawings, the clear embodiments of the present utility model have been shown, and there will be more detailed descriptions later. These accompanying drawings and the text description are not intended to limit the scope of the concept of the present utility model in any way, but to explain the concept of the present utility model to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] To make the objectives, technical solutions and advantages of the present utility model clearer, the following will clearly and completely describe the technical solutions in the present utility model with reference to the accompanying drawings in the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0022] Currently, with the continuous expansion and improvement of the highway transportation network in China, the spans of many long-span bridges have reached the kilometer level. To achieve the crossing goal, the self-weight of the beam body needs to be controlled within a certain range, and the beam body needs to consider lightweight design. Since hurricanes, strong winds, and seismic motions are extremely likely to cause large lateral movements of the beam body, the expansion joints of long-span bridges need to adapt to the lateral displacement requirements caused by natural factors in special geographical environments.
[0023] Therefore, during the design and use of expansion joints, the requirements for the use performance of expansion joints are also increasing. However, the existing expansion joints can only achieve small displacements relying on the bolt hole gaps and cannot solve the problem of excessive displacement of bridge expansion joints in extreme environments.
[0024] To address the above problems, the present utility model provides a bridge expansion joint that can achieve the lateral displacement function. By setting the support bracket and the support base plate, the stability of the expansion joint is ensured; through the mutual cooperation of the bearings and the displacement bolts, the lateral displacement of the displacement box on the sliding track can be achieved, so that the bridge expansion joint can have excessive displacement in extreme environments.
[0025] The following will specifically describe the technical solutions of the present utility model and how the technical solutions of the present utility model solve the above technical problems in detail. The following several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present utility model will be described below with reference to the accompanying drawings.
[0026] The following will be described in detail with reference to Figure 1 the present utility model.
[0027] As Figure 1 shown, the present utility model provides a bridge expansion joint that can achieve the lateral displacement function. The expansion joint is located between the steel beam body (1) and the concrete beam (12), and includes a movable plate (3), a displacement bolt (4), a rolling bearing (5), a displacement box (6), a support member (7), a mounting bolt (8), a fixing plate (9), and a ball (13); the displacement box (6) is horizontally fixed to one side of the vertical surface of the steel beam body (1) through the support member (7); a movable plate (3) is arranged above the displacement box (6), and balls (13) are arranged on both side plates.
[0028] One side of the displacement bolt (4) is fixedly connected to the movable plate (3), and the other side is connected to the rolling bearing (5) inside the displacement box (6); a sliding track is arranged inside the displacement box (6), and the sliding track is used to realize the lateral displacement of the displacement box (6); a fixed plate (9) is arranged horizontally on the right side of the movable plate (3), and the fixed plate (9) is connected to the embedded steel bar (10) through the mounting bolt (8).
[0029] Among them, the movable plate (3), the displacement bolt (4) and the rolling bearing (5) can maintain the stability of the expansion device when the beam body (1) has a large lateral displacement; the beam body (1) drives the support (7) and the displacement box (6) to realize the lateral displacement through the rolling of the ball (13) and the rolling bearing, which can avoid the serious damage of the beam body and the expansion device caused by the ineffective release of the stress of the expansion device when the beam body has a lateral displacement; in addition, the device below the movable plate (3) can ensure the effective release of the internal stress of the expansion device by releasing the lateral constraint, thus ensuring the safety of the bridge and extending the service life of the beam body and the expansion device.
[0030] Optionally, C50 concrete is poured in the groove area of the fixed plate (9).
[0031] Optionally, a lateral displacement groove is arranged at the bottom of the movable plate (3), and shock-absorbing rubber is arranged in the lateral displacement groove for shock absorption and noise reduction.
[0032] Optionally, limits are arranged at both ends of the lateral displacement groove for restricting the sliding length of the displacement box (6).
[0033] When the beam body has a large lateral displacement under extremely adverse conditions, in the limit state, the beam body is very likely to slide out of the support. At this time, the limit at the end of the lateral displacement groove below the movable plate can effectively restrict the sliding length of the displacement box, and further restrict the displacement of the beam body, so as to avoid the collapse of the beam body.
[0034] Optionally, the displacement box (6) realizes the lateral displacement through the sliding of the rolling bearing (5) on the sliding track and the rolling of the ball (13).
[0035] Optionally, the sliding track is a double sliding track.
[0036] Optionally, buffer rubbers are arranged between the displacement box (6) and the movable plate (3), and between the steel beam body (1) and the movable plate (3).
[0037] Among them, the buffer rubbers arranged between the displacement box (6) and the movable plate (3), and between the steel beam body (1) and the movable plate (3) can avoid the direct contact between rigid bodies when the vehicle passes through the expansion device, so as to realize the functions of shock absorption and noise reduction.
[0038] A bridge expansion device capable of realizing lateral displacement provided by the utility model can maintain the stability of the expansion device by setting an active plate, a displacement bolt and a rolling bearing; the lateral displacement of the expansion device can be realized by the steel beam body driving the support member and the displacement box to roll through the balls and bearings; by vulcanizing damping rubber in the displacement groove on the lower bottom surface of the active plate and arranging buffer rubber between the displacement box and the active plate and between the steel beam and the active plate, when a vehicle passes through the expansion device, direct contact between rigid bodies can be avoided, thus realizing the functions of vibration reduction and noise reduction; in addition, the sliding length of the displacement box can be effectively restricted by the limit at the end of the lateral displacement groove below the active plate, and further the displacement of the beam body can be restricted.
[0039] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered that the scope recorded by the present utility model.
Claims
1. A bridge expansion device capable of realizing the lateral displacement function, the expansion device is located between the steel beam body (1) and the concrete beam (12), and is characterized in that, It includes a movable plate (3), a displacement bolt (4), a rolling bearing (5), a displacement box (6), a support member (7), a mounting bolt (8), a fixing plate (9), and a ball (13); The displacement box (6) is horizontally fixed to one side of the vertical surface of the steel beam body (1) through the support member (7); A movable plate (3) is arranged above the displacement box (6), and balls (13) are arranged on both side plates; One side of the displacement bolt (4) is fixedly connected to the movable plate (3), and the other side is connected to the rolling bearing (5) inside the displacement box (6); A sliding track is arranged inside the displacement box (6), and the sliding track is used to realize the lateral displacement of the displacement box (6); A fixing plate (9) is arranged horizontally on the right side of the movable plate (3), and the fixing plate (9) is connected to the embedded steel bar (10) through the mounting bolt (8).
2. The bridge expansion device capable of realizing the lateral displacement function according to claim 1, characterized in that C50 concrete is poured in the groove area of the fixing plate (9).
3. The bridge expansion device capable of realizing the lateral displacement function according to claim 1, characterized in that A lateral displacement groove is arranged at the bottom of the movable plate (3), and shock-absorbing rubber is arranged in the lateral displacement groove for shock absorption and noise reduction.
4. The bridge expansion device capable of realizing the lateral displacement function according to claim 3, characterized in that Limiters are arranged at both ends of the lateral displacement groove for restricting the sliding length of the displacement box (6).
5. The bridge expansion device capable of realizing the lateral displacement function according to claim 1, characterized in that The displacement box (6) realizes the lateral displacement through the sliding of the rolling bearing (5) on the sliding track and the rolling of the balls (13).
6. The bridge expansion device capable of realizing the lateral displacement function according to claim 5, characterized in that The sliding track is a double sliding track.
7. The bridge expansion device capable of realizing the lateral displacement function according to claim 1, characterized in that Buffer rubbers are arranged between the displacement box (6) and the movable plate (3), and between the steel beam body (1) and the movable plate (3).