Bridge support capable of displaying reaction force, adjusting internal force and early warning
By designing an internal force display system and a support internal force adjustment system on the bridge support, the problems of uneven distribution of the support reaction force and difficulty in monitoring and adjusting the internal force are solved, and the reaction force balance of the beam body fulcrum and the service life of the support are achieved.
Patent Information
- Application Number
- CN202421362630.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-06-14
AI Technical Summary
During the use of existing bridge support, the uneven distribution of the support reaction force results in the twisted stress of the beam body and the local fulcrum stress increase, which in turn leads to cracking of the beam body and difficult to monitor and adjust the internal force.
A bridge support that can display support reaction force and adjust internal force and early warning is designed, including an internal force display system and a support internal force adjustment system. The internal force display system measures the internal force of the support through the internal force sensor and displays it in real time through the display device; the support internal force adjustment system adjusts the internal force of the support through the lifting adjustment device to make it even, and maintains the effectiveness of the adjustment system through the limiting device.
By monitoring the support reaction force in real time and adjusting the internal force, the twisting stress and local fulcrum stress of the beam body are reduced, the service life of the bridge support is extended, and the risk of cracking of the beam body is reduced.
Smart Images
Figure CN222878501U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of bridge bearings, and more specifically, relates to a bridge bearing capable of displaying support reaction force and adjusting internal force and early warning. Background Art
[0002] Bridge bearings are important structural components that connect the superstructure and substructure of a bridge. They are located between the bridge and the pad stone. They can reliably transfer the load and deformation (displacement and rotation) borne by the superstructure of the bridge to the substructure of the bridge. They are important force transmission devices of the bridge. There are two types of bearings: fixed bearings and movable bearings. Commonly used bearing forms in bridge engineering include: asphalt felt or flat bearings, plate rubber bearings, spherical bearings, steel bearings and special bearings.
[0003] During the use of bridge bearings, the reaction force will change continuously, resulting in uneven distribution of the reaction force and increased stress in the beam at some support points. On the one hand, this increases the torsional stress of the beam and the stress at local support points, leading to cracking of the beam, and on the other hand, it reduces the service life of the bearings. In addition, the internal force of existing bridge bearings is difficult to monitor during use, so it is impossible to adjust in real time according to the internal force.
[0004] Based on the above defects and deficiencies, this field urgently needs to make further improved designs on existing bridge bearings, construct a bearing internal force adjustment system, adjust the internal force support to the design value, balance the reaction force of the beam support point, reduce the torsional stress of the beam body and the local support stress, and reduce beam cracking. Utility Model Content
[0005] In view of the above defects or improvement needs of the prior art, the utility model provides a bridge bearing that can display support reaction force, adjust internal force and give early warning. In combination with the characteristics of the bridge bearing itself and its stress characteristics, a bridge bearing that can display support reaction force, adjust internal force and give early warning is designed accordingly, and its key components such as the structure of the internal force display system and the bearing internal force adjustment system and their specific setting methods are studied and designed, which can effectively reduce the torsional stress and local support stress of the beam body and reduce the cracking of the beam body. It has the characteristics of simple structure and convenient adjustment, can adapt to the changes in the internal force of the bridge bearing, and improve the service life of the bearing.
[0006] To achieve the above purpose, the utility model proposes a bridge bearing that can display support reaction force and adjust internal force and early warning, including:
[0007] Supports connected to the beam body;
[0008] An internal force display system provided between the support and the pier, the internal force display system comprising an internal force measuring device for measuring the internal force of the support and a protective cover, the protective cover being provided with a hollow structure with a top opening;
[0009] A support internal force adjustment system is arranged in the hollow structure, and the support internal force adjustment system includes an upper pad and a lower pad arranged in sequence from top to bottom. A plurality of lifting adjustment devices for adjusting the internal force of the support by adjusting the distance between the upper pad and the lower pad, and a plurality of limiting devices for fixing the distance between the upper pad and the lower pad are arranged between the upper pad and the lower pad.
[0010] As a further preferred embodiment, the internal force measuring device comprises a plurality of internal force sensors arranged in an array along the cross section of the support;
[0011] The internal force measuring device also includes a display device for displaying the value of the internal force sensor. The display device is arranged on the outer side of the protective cover, and the display device is electrically connected to the internal force sensor.
[0012] As further preferred, the display device includes a controller and an alarm device, and the controller is connected to the internal force sensor and the alarm device.
[0013] As a further preference, the lower pad is provided with a first groove for fixing and installing the jacking adjustment device and a second groove for fixing and installing the limiting device.
[0014] As further preferred, the limiting device includes an adjusting screw, one end of the adjusting screw is rotatably connected to the upper pad, and the other end extends into the second groove, and an adjustment gap is provided between the end of the adjusting screw that is not connected to the upper pad and the bottom surface of the second groove, and an adjusting nut is provided on the adjusting screw, the adjusting nut is arranged between the upper pad and the lower pad, and the adjusting nut is threadably connected to the adjusting screw.
[0015] As a further preference, the lifting and adjusting device is a hydraulic jack.
[0016] As a further preference, an upper support steel plate is provided between the support and the beam body, and a lower support steel plate is provided between the support and the internal force measuring device.
[0017] As a further preference, a plurality of adjustment holes for adjusting the limiting device are provided on the side of the protective cover.
[0018] In general, the above technical solution conceived by the utility model has the following technical advantages compared with the prior art:
[0019] The utility model adds an internal force sensor to the stress-bearing part of the support. The sensor transmits the internal force of the support to the display end, and can monitor the support reaction force in real time. At the same time, the utility model also sets a jacking adjustment device to adjust the internal force support to the design value, so that the reaction force of the beam support point is balanced. After the hydraulic system completes the adjustment, the limit device is activated to keep the effectiveness of the adjustment system unchanged. This device is suitable for reducing the torsional stress and local support stress of the beam body and reducing the cracking of the beam body. The utility model has a simple structure and is easy to adjust. It can adapt to the changes in the internal force of the bridge support and increase the service life of the upper beam body and the support. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural schematic diagram of a bridge bearing that can display support reaction force and adjust internal force and early warning, which is involved in a preferred embodiment of the utility model;
[0021] Figure 2 It is a schematic diagram of the planar structure of a circular bridge support that can display support reaction force and adjust internal force and early warning, which is involved in an embodiment of the utility model;
[0022] Figure 3 It is a schematic diagram of the planar structure of a square bridge support that can display support reaction force, adjust internal force and provide early warning, as involved in an embodiment of the utility model.
[0023] In all the drawings, the same figure marks represent the same technical features, specifically: 1-support, 2-internal force measuring device, 3-upper pad, 3'-lower pad, 4-support upper steel plate, 5-support lower steel plate, 6-lifting adjustment device, 7-limiting device, 8-protective cover, 9-display device. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.
[0025] like Figure 1As shown, the embodiment of the utility model provides a bridge bearing that can display the support reaction force and adjust the internal force and early warning, including: a bearing 1 connected to the beam body; a bearing upper steel plate 4 is also provided between the bearing 1 and the beam body, and a bearing lower steel plate 5 is also provided between the bearing 1 and the internal force measuring device 2. It also includes an internal force display system provided between the bearing 1 and the bridge pier, the internal force display system includes an internal force measuring device 2 for measuring the internal force of the bearing 1 and a protective cover 8, and the protective cover 8 is provided with a hollow structure with a top opening; a bearing internal force adjustment system provided in the hollow structure, the bearing internal force adjustment system includes an upper pad 3 and a lower pad 3' arranged in sequence from top to bottom, and a plurality of lifting adjustment devices 6 for adjusting the bearing internal force by adjusting the distance between the upper pad 3 and the lower pad 3' and a plurality of limit devices 7 for fixing the distance between the upper pad 3 and the lower pad 3' are provided between the upper pad 3 and the lower pad 3'. In this embodiment, an internal force measuring device is added to the stress-bearing part of the support to monitor the support reaction force of the support in real time. Since the support reaction force of the bridge superstructure will change continuously during use, resulting in uneven distribution of the support reaction force and excessive stress in the beam at some support points. When the measured support reaction force is greater than or less than the design value, the distance between the upper pad 3 and the lower pad 3' is adjusted by the jacking adjustment device 6 to make the support reaction force of each support meet the design threshold, so that the support reaction force of the beam body is balanced. After the jacking adjustment device 6 completes the adjustment, the limit device 7 is started, which adjusts the height according to the distance between the upper pad 3 and the lower pad 3' to replace the jacking adjustment device 6 as a load-bearing member between the upper pad 3 and the lower pad 3'.
[0026] Based on the above embodiments, as a preferred embodiment of the present invention, the internal force measuring device 2 includes a plurality of internal force sensors arranged in an array along the cross section of the support 1; the internal force measuring device 2 also includes a display device 9 for displaying the value of the internal force sensor, and the display device 9 is arranged on the outer side of the protective cover 8, and the display device 9 is electrically connected to the internal force sensor. More specifically, in this embodiment, the internal force measuring device 2 includes a measuring support plate, on which a plurality of internal force sensors for measuring the internal force of the support are integrated. In this embodiment, the internal force sensor is only used to measure the internal force of the support, and all sensors that meet the requirements are applicable to the present invention, and in this embodiment, the internal force includes axial force, shear force and bending moment. In addition, as a preferred embodiment of the present invention, a plurality of sensors are evenly arranged along the cross section of the measuring support plate, so that the internal force monitored by them is more accurate. For example, in one embodiment of the present invention, Figure 2 and Figure 3 As shown, if the support is a circular support, the sensors are arranged in a circular array with the center line of the support as the center; if the support is a square support, the sensors are arranged in a square array with the center line of the support as the center.
[0027] As a further preferred embodiment, the display device includes a controller and an alarm device, and the controller is connected to the internal force sensor and the alarm device. When the measured internal force value is greater than or less than a preset value, the alarm device alarms. More specifically, in this embodiment, the alarm device used is a prior art and does not fall within the scope of protection of the present utility model. In addition, the prior art method of triggering the alarm device to alarm by value comparison does not fall within the scope of protection of the present utility model.
[0028] Based on the above embodiment or a combination of multiple embodiments, as a preferred solution of the utility model, the lower pad 3' is provided with a first groove for fixing and installing the jacking adjustment device 6 and a second groove for fixing and installing the limit device 7. The limit device 7 includes an adjusting screw, one end of which is rotatably connected to the upper pad 3, and the other end extends into the second groove, and an adjustment gap is provided between the end of the adjusting screw that is not connected to the upper pad 3 and the bottom surface of the second groove, and an adjusting nut is provided on the adjusting screw, the adjusting nut is arranged between the upper pad 3 and the lower pad 3', and the adjusting nut is threadedly connected to the adjusting screw. In this embodiment, the adjusting screw is non-fixedly connected to the upper pad 3, so as to facilitate the adjusting screw to adjust the distance between the upper pad 3 and the lower pad 3'. In a preferred embodiment of the utility model, in order to improve the stability and reliability of the structure, the adjusting screw includes an integrally formed nut and a screw, wherein the nut is connected to the upper pad 3 to increase the force-bearing area. In a preferred embodiment of the utility model, the inner wall of the second groove is provided with a thread matching the thread of the adjusting screw. That is, the adjusting screw is connected with the lower pad 3' and the adjusting nut by threads, and the distance between the upper and lower pads is adjusted by rotating the adjusting screw to play a role of limiting, and then the adjusting screw remains stationary, and the adjusting nut is rotated to move toward the lower pad, and clamped with the lower pad, to prevent the screw from loosening.
[0029] Based on the above embodiment or a combination of multiple embodiments, the lifting and adjusting device 6 is a hydraulic jack.
[0030] Based on the above embodiment or a combination of multiple embodiments, a plurality of adjustment holes for adjusting the limiting device 7 are provided on the side of the protective cover 8 .
[0031] In addition, in the present invention, calculating the adjustment distance between the upper pad 3 and the lower pad 3' according to the measured value of the sensor is a prior art and does not fall within the protection scope of the present invention. Displaying the sensor value through a display device is also a prior art and does not fall within the protection scope of the present invention.
[0032] This embodiment adds an internal force sensor to the stress-bearing part of the support. The sensor transmits the internal force of the support to the display terminal, and the support reaction force can be monitored in real time. Since the support reaction force will change continuously during the use of the bridge superstructure, resulting in uneven distribution of the support reaction force and excessive stress in the beam at some fulcrum positions, the internal force support is adjusted to the design value through the support internal force adjustment hydraulic device. When the support internal force display is larger than the design value, the height of the hydraulic device is lowered; when the support internal force display is smaller than the design value, the height of the hydraulic device is increased to make the displayed internal force close to the design value, so that the reaction force of the beam support is balanced. After the hydraulic device completes the adjustment, the limit device 7 is activated to keep the effectiveness of the adjustment system unchanged. This device is suitable for reducing the torsional stress and local fulcrum stress of the beam body and reducing the cracking of the beam body.
[0033] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A bridge bearing capable of displaying support reaction force, adjusting internal force and providing early warning, characterized in that: include: A support (1) connected to the beam body; An internal force display system is provided between the support (1) and the bridge pier, the internal force display system comprising an internal force measuring device (2) for measuring the internal force of the support (1) and a protective cover (8), wherein the protective cover (8) is provided with a hollow structure with a top opening; A support internal force adjustment system is provided in the hollow structure, the support internal force adjustment system comprises an upper pad (3) and a lower pad (3') arranged in sequence from top to bottom, and a plurality of lifting adjustment devices (6) for adjusting the support internal force by adjusting the distance between the upper pad (3) and the lower pad (3') and a plurality of limiting devices (7) for fixing the distance between the upper pad (3) and the lower pad (3') are provided between the upper pad (3) and the lower pad (3').
2. A bridge bearing capable of displaying support reaction force, adjusting internal force and providing early warning according to claim 1, characterized in that: The internal force measuring device (2) comprises a plurality of internal force sensors arranged in an array along the cross section of the support (1); The internal force measuring device (2) further comprises a display device (9) for displaying the value of the internal force sensor; the display device (9) is arranged on the outer side of the protective cover (8), and the display device (9) is electrically connected to the internal force sensor.
3. A bridge bearing capable of displaying support reaction force, adjusting internal force and providing early warning according to claim 2, characterized in that: The display device (9) comprises a controller and an alarm device, and the controller is connected to the internal force sensor and the alarm device.
4. A bridge bearing capable of displaying support reaction force, adjusting internal force and providing early warning according to claim 1, characterized in that: The lower pad (3') is provided with a first groove for fixing and installing the lifting adjustment device (6) and a second groove for fixing and installing the limiting device (7).
5. A bridge bearing capable of displaying support reaction force, adjusting internal force and providing early warning according to claim 4, characterized in that: The limiting device (7) comprises an adjusting screw, one end of which is rotatably connected to the upper pad (3), and the other end of which extends into the second groove, and an adjusting gap is provided between the end of the adjusting screw not connected to the upper pad (3) and the bottom surface of the second groove, and an adjusting nut is provided on the adjusting screw, the adjusting nut is arranged between the upper pad (3) and the lower pad (3'), and the adjusting nut is threadedly connected to the adjusting screw.
6. A bridge bearing capable of displaying support reaction force, adjusting internal force and providing early warning according to any one of claims 1 to 5, characterized in that: The lifting and adjusting device (6) is a hydraulic jack.
7. A bridge bearing capable of displaying support reaction force, adjusting internal force and providing early warning according to any one of claims 1 to 5, characterized in that: An upper support steel plate (4) is also provided between the support (1) and the beam body, and a lower support steel plate (5) is also provided between the support (1) and the internal force measuring device (2).
8. A bridge bearing capable of displaying support reaction force, adjusting internal force and providing early warning according to any one of claims 1 to 5, characterized in that: The side surface of the protective cover (8) is provided with a plurality of adjustment holes for adjusting the limiting device (7).