Multi-degree-of-freedom deformation monitoring and maintaining device for bridge support

Abstract

The utility model discloses a multi-degree-of-freedom deformation monitoring and maintaining device for a bridge support. The multi-degree-of-freedom deformation monitoring and maintaining device comprises a support displacement sensor, a contact type displacement sensor, a laser sensor and a laser target, the support displacement sensor is vertically arranged on the padstone, and a measuring rod of the support displacement sensor is connected with the main beam; the contact type displacement sensor is horizontally installed on an abutment through a support, and the contact end of the contact type displacement sensor makes contact with the outer side face of a main beam. The laser sensor is arranged on the support. A support displacement sensor and a laser sensor form a support compression deformation measurement system, the overall compression deformation and deflection angle of the support can be accurately represented, and the support void phenomenon can be found in time; and the relative shearing displacement of the main beam and the abutment is detected through the contact type displacement sensors and the laser sensors on the adjacent edges. The device has better anti-interference capability, can provide measurement data with high reliability in real time, and can strictly control the jacking of the bridge when the bridge is replaced.

Description

Technical Field

[0001] The utility model relates to the technology of safety diagnosis of in-service bridges, and in particular to a multi-degree-of-freedom deformation monitoring and maintenance device for bridge bearings. Background Art

[0002] The safety and stability of bearings are directly related to the normal use of bridge structures. Once serious bearing diseases occur, it will seriously affect the bearing capacity and use safety of bridges. Affected by vehicle loads and service environments, bridge bearings often suffer from diseases such as cracking, bulging, crosstalk, voiding, and shear displacement. Accurately and quantitatively identifying these bridge bearing diseases is one of the key contents in the bridge operation and maintenance stage. The existing detection technologies for bridge bearings mainly include manual detection methods, image detection methods, and structural dynamic response methods. Manual detection methods and structural dynamic response methods require the aid of large mechanical equipment, with large workloads, long detection cycles, and great interference to traffic. Image recognition methods are difficult to accurately detect positions with small spaces and dim light. How to realize the long-term monitoring of bridge bearing diseases has become the focus of solving the above problems. The bearing monitoring method mainly arranges different types of sensors inside or outside the bearing, and diagnoses diseases based on the data collected by the sensors. For example, the deformation data in multiple directions of the bridge bearing can be collected, that is, the multi-degree-of-freedom deformation measurement of the bridge bearing, to monitor its health status in real time.

[0003] In view of this, a multi-degree-of-freedom deformation monitoring and maintenance device for bridge bearings is proposed. Through the combination of a bearing displacement sensor, a contact displacement sensor, and a laser sensor, the multi-degree-of-freedom monitoring of the bridge bearing can be carried out in real time, and at the same time, the cost can be saved, which is of great significance for ensuring the healthy operation of the bridge bearing. Summary of the Utility Model

[0004] In view of this, in view of the deficiencies of the existing technology, the main purpose of the present utility model is to provide a multi-degree-of-freedom deformation monitoring and maintenance device for bridge bearings, which has perfect functions and stable performance and can be effectively used to monitor the deformation and displacement of bridge bearings in real time.

[0005] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0006] A multi-degree-of-freedom deformation monitoring and maintenance device for bridge bearings includes a bearing displacement sensor, a contact displacement sensor, a laser sensor, and a laser target; the bearing displacement sensor is vertically arranged on the pier cap, and the measuring rod of the bearing displacement sensor is connected to the main beam; the contact displacement sensor is horizontally installed on the pier through a bracket, and the contact end of the contact displacement sensor contacts the outer side surface of the main beam; the laser sensor is arranged on the bracket; the laser target is arranged on the main beam and is opposite to the laser sensor in cooperation.

[0007] Preferably, there are multiple support displacement sensors, and the multiple support displacement sensors are respectively located at the corners of the cushion stone.

[0008] Preferably, a first angle steel is fixed on the cushion stone, the support displacement sensor is fixed on the first angle steel, a second angle steel is fixed on the main beam, a hole is provided at the outer end of the second angle steel, and the measuring rod of the support displacement sensor is inserted into the hole for connection.

[0009] Preferably, the laser target is made of magnetically attachable acrylic material and is adsorbed on the second angle steel.

[0010] Preferably, there are multiple brackets, and the multiple brackets are respectively located at the corners of the cushion stone and the periphery of any two adjacent sides. Each bracket is provided with the aforementioned laser sensor, and there are multiple contact displacement sensors, and the multiple contact displacement sensors are respectively installed on some brackets.

[0011] Preferably, the laser sensor is a wireless device.

[0012] Preferably, the bracket has multiple screw holes with different heights for installing the laser sensor and the contact displacement sensor.

[0013] Preferably, the bracket includes a support and a steel sheet arranged on the support. The steel sheet is provided with a first threaded hole matching the thread of the contact displacement sensor itself, and both sides of the steel sheet are provided with second threaded holes with the same aperture as the support.

[0014] Preferably, the contact displacement sensor is connected to the steel sheet through its own thread, and the steel sheet is fixed on the support by screws.

[0015] Preferably, the laser sensor itself has screw holes required for installation and is directly fixed on the bracket by screws.

[0016] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solutions:

[0017] (1) This device can obtain the real-time deformation and displacement of the bridge support by arranging each sensor and combining data processing, and the monitoring of the bridge support is very comprehensive; (2) By using laser sensors and contact displacement sensors, it is possible to comprehensively compare to ensure the reliability of the data. This device adopts a dual-insurance design and has good anti-interference ability. Even if a certain number of sensors stop working due to various reasons, it will not affect the operation of the entire system in a short time, and there is enough time to solve the problem; (3) When replacing the bridge support, this device can effectively monitor the entire process and ensure that the bridge is not damaged due to work mistakes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the operation of the preferred embodiment of the present utility model;

[0019] Figure 2 It is the front view of the preferred embodiment of the present utility model;

[0020] Figure 3 It is a schematic diagram of the work for replacing the bridge bearing of the preferred embodiment of the present utility model.

[0021] Explanation of the attached drawing reference numerals:

[0022] 10, bearing displacement sensor; 11, measuring rod

[0023] 20, contact displacement sensor; 21, contact end

[0024] 30, laser sensor; 40, laser target

[0025] 50, pier cap; 51, first angle steel

[0026] 60, main beam; 61, second angle steel

[0027] 70, bracket; 71, bearing

[0028] 72, steel sheet; 80, pier and abutment

[0029] 90, jacking device Detailed implementation manners

[0030] Please refer to Figures 1 to 3 as shown, which shows the specific structure of the preferred embodiment of the present utility model, including a bearing displacement sensor 10, a contact displacement sensor 20, a laser sensor 30 and a laser target 40.

[0031] The bearing displacement sensor 10 is vertically arranged on the pier cap 50, and the measuring rod 11 of the bearing displacement sensor 10 is connected to the main beam 60. In this embodiment, there are multiple bearing displacement sensors 10, and the multiple bearing displacement sensors 10 are respectively located at the respective corners of the pier cap 50. And, a first angle steel 51 is fixed on the pier cap 50, the bearing displacement sensor 10 is fixed on the first angle steel 51, a second angle steel 61 is fixed on the main beam 60, the outer end of the second angle steel 61 has a hole, and the measuring rod 11 of the bearing displacement sensor 10 is inserted into the hole for connection, and the measuring rod 11 passes upward through the hole. And, the pier cap 50 is square, and there are four bearing displacement sensors 10, and the four bearing displacement sensors 10 are respectively located at the four corners of the upper surface of the pier cap 50.

[0032] The contact displacement sensor 20 is horizontally installed on the pier 80 through the support 70. The contact end 21 of the contact displacement sensor 20 contacts the outer side of the main girder 60. When installing the contact displacement sensor 20, the contact area between the contact displacement sensor 20 and the main girder 60 should be cleaned to ensure good and stable contact. The laser sensor 30 is arranged on the support 70; the laser target 40 is arranged on the main girder 60 and is opposite to the laser sensor 30 in cooperation.

[0033] In this embodiment, there are multiple supports 70. The multiple supports 70 are respectively located at the corners of the bearing pad stone 50 and the periphery of any two adjacent sides. The aforementioned laser sensor 30 is arranged on each support 70. There are multiple contact displacement sensors 20, and the multiple contact displacement sensors 20 are respectively installed on some of the supports 70. The support 70 has multiple screw holes with different heights for installing the laser sensor 30 and the contact displacement sensor 20 (not shown in the figure), which is convenient for adjusting the heights of the laser sensor 30 and the contact displacement sensor 20 loaded thereon. The support 70 includes a support 71 and a steel sheet 72 arranged on the support 71. The steel sheet 72 is provided with a first threaded hole (not shown in the figure) matching the self-thread of the contact displacement sensor 20, and both sides of the steel sheet 72 are provided with second threaded holes with the same aperture as the support 71. The contact displacement sensor 20 is connected to the steel sheet 72 through its own thread, and the steel sheet 72 is fixed on the support 71 by screws.

[0034] Moreover, the laser sensor 30 is a wireless device and can measure the elevation of the target position. The laser sensor 30 itself has screw holes required for installation (not shown in the figure) and is directly fixed on the support 70 by screws. And the laser target 40 can be made of any material. If it is an acrylic material with magnet adsorption, it is adsorbed on the second angle steel 61. The laser target 40 and the laser sensor 30 form a complete device, that is, the laser target 40 is installed within the measurement range of the laser sensor 30.

[0035] The utility model can be used in the synchronous jacking system for bridge bearing replacement, and the specific steps are as follows:

[0036] S1: First, calculate the bearing displacement according to the bridge structure design to ensure that the jacking height of the main girder 60 is reasonable, generally within 10 mm.

[0037] S2: Arrange the jacking device 90 with the total jacking force reaching 1.5 times the self-weight of the bridge.

[0038] S3: Jack the main girder 60 in several stages for multiple times, combine with the device of the utility model for displacement measurement, and correct the jacking instructions sent by the control system of the jacking device 90 in real time through the measurement data to ensure the synchronous jacking of the main girder 60 and avoid excessive skew damage to the bridge structure.

[0039] S4: After the jacking reaches the designed height, arrange temporary supports, grind and level the installation position of the bearing, and replace the bridge bearing.

[0040] S5: Remove all temporary supports, and refer to the measurement data of the device of the present utility model to control the jacking device 90 to slowly and steadily lower the main beam 60.

[0041] The design focus of the present utility model is: a bearing compression deformation measurement system is formed by a bearing displacement sensor and a laser sensor, which can accurately characterize the overall compression deformation and deflection angle of the bearing, and timely detect the phenomenon of bearing void; the relative shear displacement between the main beam and the pier is detected by a contact displacement sensor and a laser sensor on adjacent sides. The device has good anti-interference ability, can provide measurement data with high reliability in real time, and can strictly control the jacking of the bridge during bridge replacement.

[0042] The technical principle of the present utility model has been described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present utility model and cannot be construed in any way as a limitation on the protection scope of the present utility model. Based on the explanations herein, those skilled in the art can think of other specific embodiments of the present utility model without creative labor, and these embodiments will fall within the protection scope of the present utility model.

Claims

1. A multi-degree-of-freedom deformation monitoring and maintenance device for a bridge bearing, characterized in that: It includes a bearing displacement sensor, a contact displacement sensor, a laser sensor and a laser target; the bearing displacement sensor is vertically arranged on the cushion stone, and the measuring rod of the bearing displacement sensor is connected to the main beam; the contact displacement sensor is horizontally installed on the pier through a bracket, and the contact end of the contact displacement sensor contacts the outer side of the main beam; the laser sensor is arranged on the bracket; the laser target is arranged on the main beam and is opposite to the laser sensor in cooperation.

2. The multi-degree-of-freedom deformation monitoring and maintenance device for a bridge bearing according to claim 1, wherein: There are multiple bearing displacement sensors, and the multiple bearing displacement sensors are respectively located at the corners of the cushion stone.

3. The multi-degree-of-freedom deformation monitoring and maintenance device for a bridge bearing according to claim 1, characterized in that: A first angle steel is fixed on the cushion stone, the bearing displacement sensor is fixed on the first angle steel, a second angle steel is fixed on the main beam, a hole is provided at the outer end of the second angle steel, and the measuring rod of the bearing displacement sensor is inserted into the hole for connection.

4. The multi-degree-of-freedom deformation monitoring and maintenance device for a bridge bearing according to claim 3, characterized in that: The laser target is made of acrylic material with magnetic adsorption and is adsorbed on the second angle steel.

5. The multi-degree-of-freedom deformation monitoring and maintenance device for a bridge bearing according to claim 1, characterized in that: There are multiple brackets, and the multiple brackets are respectively located at the corners of the cushion stone and the periphery of any two adjacent sides. Each bracket is provided with the aforementioned laser sensor. There are multiple contact displacement sensors, and the multiple contact displacement sensors are respectively installed on some brackets.

6. The multi-degree-of-freedom deformation monitoring and maintenance device for a bridge bearing according to claim 1, characterized in that: The laser sensor is a wireless device.

7. The multi-degree-of-freedom deformation monitoring and maintenance device for a bridge bearing according to claim 1, characterized in that: The bracket has multiple screw holes with different heights for installing the laser sensor and the contact displacement sensor.

8. The multi-degree-of-freedom deformation monitoring and maintenance device for a bridge bearing according to claim 1, characterized in that: The bracket includes a support and a steel sheet arranged on the support. The steel sheet is provided with a first threaded hole matching the self-thread of the contact displacement sensor, and both sides of the steel sheet are provided with second threaded holes with the same aperture as the support.

9. The multi-degree-of-freedom deformation monitoring and maintenance device for a bridge bearing according to claim 8, characterized in that: The contact displacement sensor is connected to the steel sheet through its own thread, and the steel sheet is fixed on the support by screws.

10. The multi-degree-of-freedom deformation monitoring and maintenance device for a bridge bearing according to claim 1, characterized in that: The laser sensor itself has screw holes required for installation and is directly fixed on the bracket by screws.

Images