Curve beam bridge automatic anti-overturning system based on magnetic suspension technology

Abstract

The invention relates to the field of bridge engineering, in particular to a curve beam bridge automatic anti-overturning system based on a magnetic suspension technology, which comprises a force measuring system arranged on a bridge pier and a magnetic suspension jacking system arranged on the bridge pier, the magnetic suspension jacking system comprises a signal receiving terminal, a signal conversion unit, a magnetic force control unit and a magnetic suspension jacking device which are arranged on the support, the force measurement sensor, the force signal processor and the signal transmitter are used in cooperation, the force measurement sensor reflects the counter-force change state of the curved beam bridge support in real time, and the counter-force change state of the curved beam bridge support is reflected in real time. The force signal processor converts a measured force signal into a direct proportion electric signal, and then the magnetic element is controlled by the magnetic control unit to release corresponding magnetic force to assist in resisting unbalance loading, so that the support can be effectively prevented from disengaging.

Description

Technical Field

[0001] The present invention relates to the field of bridge engineering, and particularly to an automatic anti-overturning system for curved girder bridges based on magnetic levitation technology. Background Art

[0002] In the construction of expressways and urban roads, due to linear control, there are a certain proportion of curved girder bridges. Almost all highway ramps adopt curved girder bridges. When urban interchanges cross the downward road or bridge, in order to meet the requirements of ground traffic lane layout, small-radius curved girder bridges are mostly used. Compared with straight bridges, the main girder of curved girder bridges bears greater torsional effects under dead loads and live loads. Especially when combined with single-column piers, the overall anti-overturning stability of the structure is relatively low. Under the action of heavy vehicle eccentric loads, such bridge overturning accidents occur frequently, causing heavy losses of personnel and property and negative social impacts. Currently, steel structure capping beams are generally added to reinforce single-column pier bridges and curved girder bridges. However, the reinforcement of curved girder bridges involves many factors and is difficult to construct, which is a very challenging task. Summary of the Invention

[0003] In view of the problem that the overall anti-overturning stability of the structure is relatively low when combined with single-column piers of curved girder bridges in the above or existing technologies, the present invention is proposed.

[0004] Therefore, the purpose of the present invention is to provide an automatic anti-overturning system for curved girder bridges based on magnetic levitation technology.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: As a preferred solution of the automatic anti-overturning system for curved girder bridges based on magnetic levitation technology of the present invention, it includes: a force measurement system arranged on the pier, and a magnetic levitation jacking system arranged on the pier; the magnetic levitation jacking system includes a signal receiving terminal, a signal conversion unit, a magnetic force control unit, and a magnetic levitation jacking device arranged on the bearing.

[0006] As a preferred solution of the automatic anti-overturning system for curved girder bridges based on magnetic levitation technology of the present invention, it includes: the force measurement system includes a force sensor, a solar panel, a data acquisition system, a force signal processor, and a signal transmitter arranged on the pier; the force sensor, the data acquisition system, the force signal processor, and the signal transmitter are connected by wires and powered by the solar panel.

[0007] As a preferred solution of the automatic anti-overturning system for curved girder bridges based on magnetic levitation technology of the present invention, when the force sensor obtains that the change in the bearing reaction force exceeds the limit, the force signal processor converts the signal of the force sensor into a proportional electrical signal and transmits the signal through the signal transmitter.

[0008] As a preferred embodiment of the automatic anti-overturning system for curved girder bridges based on magnetic levitation technology of the present invention, the force measuring sensors need to be calibrated and calibrated after installation, and the strength of the electrical signal emitted is determined according to the magnitude of the bearing reaction force measured.

[0009] As a preferred embodiment of the automatic anti-overturning system for curved girder bridges based on magnetic levitation technology of the present invention, when the value of the force measuring sensor is lower than the reaction force under the action of only dead load, the force signal processor starts to work, and at this time the signal transmitter starts to emit an electrical signal; when the value of the force measuring sensor is 0, the bearing is in a state of being disengaged, and the emitted electrical signal is in the strongest state.

[0010] As a preferred embodiment of the automatic anti-overturning system for curved girder bridges based on magnetic levitation technology of the present invention, the magnetic levitation jacking device includes a steel plate at the bottom of the beam provided on the curved girder bridge, a rectangular steel plate provided on the steel plate at the bottom of the beam, a magnetic element provided on the rectangular steel plate, a support spring provided on the rectangular steel plate, and a bottom fixing steel plate provided on the pier; there are two groups of rectangular steel plates, which are connected up and down through support springs.

[0011] As a preferred embodiment of the automatic anti-overturning system for curved girder bridges based on magnetic levitation technology of the present invention, the support spring connects the rectangular steel plate and the magnetic element into a whole, and is connected to the signal receiving terminal, the signal conversion unit, and the magnetic force control unit, and is powered by an external AC power supply.

[0012] As a preferred embodiment of the automatic anti-overturning system for curved girder bridges based on magnetic levitation technology of the present invention, the magnetic element is encapsulated in a special groove opened on the rectangular steel plate. After the power is turned on, the magnetic poles of the upper and lower magnetic elements are the same, generating a repulsive force.

[0013] As a preferred embodiment of the automatic anti-overturning system for curved girder bridges based on magnetic levitation technology of the present invention, when the signal receiving terminal receives a signal, the magnetic force control unit controls the magnitude of the magnetic force released by the magnetic element according to the strength of the electrical signal.

[0014] As a preferred embodiment of the automatic anti-overturning system for curved girder bridges based on magnetic levitation technology of the present invention, the maximum magnetic force generated by the magnetic element is calculated and determined according to the state of the inner support of the curved girder bridge being disengaged, and a certain safety margin is considered.

[0015] Beneficial effects of the automated anti-overturning system for curved girder bridges based on magnetic levitation technology of the present invention: 1. Real-time monitoring of the change in bearing reaction force and automatic anti-overturning response. The present invention uses a force measuring sensor, a force signal processor, and a signal transmitter in cooperation. The force measuring sensor reflects the change state of the bearing reaction force of the curved girder bridge in real time. The force signal processor converts the measured force signal into a proportional electrical signal, and then controls the magnetic force element to release the corresponding magnetic force through the magnetic force control unit to assist in resisting the eccentric load, which can effectively prevent the bearing from becoming disengaged. 2. The device has a simple structure and significant economic benefits. The force measuring system and the magnetic levitation jacking system involved in the present invention have a simple structure. When abnormal changes in the bearing reaction force occur in the curved girder bridge, the magnetic levitation jacking system can be started in a timely and effective manner, thereby preventing the occurrence of overturning phenomena. Compared with the current anti-overturning reinforcement methods mostly used, the cost investment is greatly reduced, and the economic benefits are significant.

[0016] 3. The device is flexible in application and has a good application prospect. The force measuring system and the magnetic levitation jacking system involved in the present invention are easy to install and occupy a small space. It can be applied to both curved girder bridges with double supports or multiple supports and single-column pier bridges. Moreover, both the force measuring system and the magnetic levitation jacking system can be reused, with good sustainability, and have high application value and engineering significance. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the overall installation structure of the automated anti-overturning system for curved girder bridges based on magnetic levitation technology.

[0019] Figure 2 It is a schematic diagram of the structure of the force measuring system of the automated anti-overturning system for curved girder bridges based on magnetic levitation technology.

[0020] Figure 3 It is a schematic diagram of the structure of the magnetic levitation jacking system of the automated anti-overturning system for curved girder bridges based on magnetic levitation technology.

[0021] Figure 4 It is a schematic diagram of the structure of the magnetic levitation jacking device of the automated anti-overturning system for curved girder bridges based on magnetic levitation technology.

[0022] In the figure: 1, curved girder bridge; 2, pier; 3, bearing pad stone; 4, bearing; 5, force measurement system; 51, force measurement sensor; 52, solar panel; 53, data acquisition system; 54, force signal processor; 55, signal transmitter; 6, maglev jacking system; 61, signal receiving terminal; 62, signal conversion unit; 63, magnetic force control unit; 64, maglev jacking device; 641, steel plate at the bottom of the beam; 642, rectangular steel plate; 643, magnetic force element; 644, support spring; 645, bottom fixing steel plate; 7, concrete pad stone. Detailed implementation mode

[0023] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation mode of the present invention with reference to the accompanying drawings of the specification.

[0024] Example 1, referring to Figures 1 - 4 , which is the first embodiment of the present invention. This embodiment provides an automated anti-overturning system for a curved girder bridge based on maglev technology, which includes a force measurement system 5 arranged on the pier 2 for detecting the magnitude of the force between the curved girder bridge 1 and the bearing 4, and a maglev jacking system 6 arranged on the pier 2 for reacting to the data detected by the force measurement system 5 and generating a force in the direction opposite to the lateral force to prevent the curved girder bridge 1 from overturning; The maglev jacking system 6 includes a signal receiving terminal 61 arranged on the bearing 4 for receiving the digital signal sent by the force measurement system 5, a signal conversion unit 62 for converting the digital signal received by the signal receiving terminal 61 into an electrical signal, a magnetic force control unit 63 for cooperating with the electrical signal converted by the signal conversion unit 62 to make different instructions, and a maglev jacking device 64 for performing a jacking activity by receiving the instructions of the magnetic force control unit 63.

[0025] In summary, first, the force measurement system 5 is installed between the curved girder bridge 1 and the pier 2 and is in full contact with the curved girder bridge 1 and the pier 2 to realize real-time monitoring of the pressure change of the curved girder bridge 1 on the bearing 4. The maglev jacking system 6 is installed between the curved girder bridge 1 and the pier 2, and a signal communication is maintained between the force measurement system 5 and the signal receiving terminal 61. At this time, when the curved girder bridge 1 has a tendency to overturn due to a large unilateral load, the force measurement system 5 will detect a change in the force between the curved girder bridge 1 and the bearing 4. At this time, the force measurement system 5 sends a corresponding signal to the signal receiving terminal 61 according to the force change. At this time, the signal conversion unit 62 converts the received digital signal into an electrical signal. At this time, the magnetic force control unit 63 issues an instruction to the maglev jacking device 64 according to the generated electrical signal, so that the maglev jacking device 64 generates a corresponding force to offset the force that causes the curved girder bridge 1 to overturn and maintain the stability of the curved girder bridge 1.

[0026] Example 2, referring toFigures 1 - 4 , which is the second embodiment of the present invention. Different from the previous embodiment, the force acting between the curved girder bridge 1 and the bearing 4 is detected. Further compared with Embodiment 1, the force measuring system 5 includes a force measuring sensor 51 disposed on the bridge pier 2 for detecting the pressure change between the curved girder bridge 1 and the bearing 4, a solar panel 52 for providing power, a data acquisition system 53 for collecting the data detected by the force measuring sensor 51, a force signal processor 54 for receiving the data collected by the data acquisition system 53 and converting and integrating it into corresponding signals, and a signal transmitter 55 for transmitting the signals generated by the force signal processor 54 to the signal receiving terminal 61; The force measuring sensor 51, the data acquisition system 53, the force signal processor 54, and the signal transmitter 55 are connected by wires and powered by the solar panel 52.

[0027] Among them, when the force measuring sensor 51 obtains that the reaction force change of the bearing 4 exceeds the limit, the force signal processor 54 converts the signal of the force measuring sensor 51 into a proportional electrical signal and transmits the signal through the signal transmitter 55.

[0028] Among them, after the force measuring sensor 51 is installed, it needs to be calibrated and calibrated, and the strength of the electrical signal sent is determined according to the measured bearing reaction force.

[0029] Among them, when the value of the force measuring sensor 51 is lower than the reaction force under the action of only dead load, the force signal processor 54 starts to work, and at this time the signal transmitter 55 starts to send out electrical signals; When the value of the force measuring sensor 51 is 0, the bearing 4 is in a state of being disengaged, and the electrical signal sent is in the strongest state.

[0030] The remaining structures are the same as those in Embodiment 1.

[0031] In summary, when the curved girder bridge 1 is in normal use, the data detected by the force measuring sensor 51 at this time is equal to the pressure between the curved girder bridge 1 and the bearing 4. At this time, the signal transmitter 55 is in a non-working state. When the curved girder bridge 1 shows a tendency to overturn, the force between the curved girder bridge 1 and the bearing 4 changes at this time. At this time, the data acquisition system 53 collects the data detected by the force measuring sensor 51, the force signal processor 54 integrates the data and generates corresponding signals, and the signal transmitter 55 sends the signals to the signal receiving terminal 61. At this time, the signal conversion unit 62 converts the received signals and controls the magnetic control unit 63 to send corresponding instructions to the maglev jacking device 64, so that the maglev jacking device 64 generates a corresponding force to resist overturning and drives the curved girder bridge 1 to return to the normal state.

[0032] Embodiment 3, refer to Figures 1 - 4, which is the second embodiment of the present invention. Different from the previous embodiment, it is to maintain the stability of the curved girder bridge 1. Further compared with Embodiment 1, the magnetic levitation jacking device 64 includes a bottom steel plate 641 disposed on the curved girder bridge 1, a rectangular steel plate 642 disposed on the bottom steel plate 641, a magnetic force element 643 disposed on the rectangular steel plate 642 for generating magnetic force to maintain the stability of the curved girder bridge 1 by controlling the magnitude of the magnetic force, a support spring 644 disposed on the rectangular steel plate 642, and a bottom fixing steel plate 645 disposed on the pier 2. The magnetic force element 643 is fixed on the rectangular steel plate 642 and is connected to the curved girder bridge 1 and the concrete cushion stone 7 through the bottom steel plate 641 and the bottom fixing steel plate 645 respectively; There are two sets of rectangular steel plates 642, which are connected up and down through the support springs 644. The rectangular steel plates 642 are welded to the bottom steel plate 641 and the bottom fixing steel plate 645, and the bottom fixing steel plate 645 is bolted to the concrete cushion stone 7.

[0033] Among them, the support spring 644 connects the rectangular steel plate 642 and the magnetic force element 643 into a whole, and is connected to the signal receiving terminal 61, the signal conversion unit 62, and the magnetic force control unit 63, and is powered by an external AC power supply.

[0034] Among them, the magnetic force element 643 is encapsulated in a special groove opened on the rectangular steel plate 642. After the power is turned on, the magnetic poles of the upper and lower magnetic force elements 643 are the same, generating a repulsive force.

[0035] When the signal receiving terminal 61 receives a signal, the magnetic force control unit 63 controls the magnitude of the magnetic force released by the magnetic force element 643 according to the strength of the electrical signal.

[0036] The maximum magnetic force generated by the magnetic force element 643 is calculated and determined according to the void state of the inner support 4 of the curved girder bridge, and a certain safety margin is considered.

[0037] The rest of the structure is the same as that of Embodiment 2.

[0038] In summary, when the curved girder bridge 1 shows a tendency to overturn, at this time the signal transmitter 55 transmits the signal to the signal receiving terminal 61. At this time, the magnetic force control unit 63 issues corresponding instructions to the magnetic force element 643 according to the signal. At this time, the corresponding repulsive force is generated between the magnetic force elements 643 to resist the force that causes the curved girder bridge 1 to overturn and keep the curved girder bridge 1 in a stable state. The repulsive force generated by the magnetic force element 643 changes according to the real-time instructions issued by the magnetic force control unit 63.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered by the scope of the claims of the present invention.

Claims

1. An automated anti-overturning system for a curved girder bridge based on magnetic levitation technology, comprising a curved girder bridge (1), piers (2) provided on the curved girder bridge (1), a bearing pad stone (3) provided between the curved girder bridge (1) and the piers (2), and bearings (4) provided between the curved girder bridge (1) and the piers (2), characterized in that: It includes a force measurement system (5) arranged on the pier (2), and a magnetic levitation jacking system (6) arranged on the pier (2); The magnetic levitation jacking system (6) includes a signal receiving terminal (61), a signal conversion unit (62), a magnetic force control unit (63), and a magnetic levitation jacking device (64) arranged on the bearing (4).

2. The automated anti-overturning system for a curved girder bridge based on magnetic levitation technology according to claim 1, characterized in that: The force measurement system (5) includes a force measurement sensor (51), a solar panel (52), a data acquisition system (53), a force signal processor (54), and a signal transmitter (55) arranged on the pier (2); The force measurement sensor (51), the data acquisition system (53), the force signal processor (54), and the signal transmitter (55) are connected by wires and powered by the solar panel (52).

3. The automated anti-overturning system for a curved girder bridge based on magnetic levitation technology according to claim 2, wherein: When the force measurement sensor (51) obtains that the change in the reaction force of the bearing (4) exceeds the limit, the force signal processor (54) converts the signal of the force measurement sensor (51) into a proportional electrical signal and transmits the signal through the signal transmitter (55).

4. The automated anti-overturning system for a curved girder bridge based on magnetic levitation technology according to claim 3, wherein: After the force measurement sensor (51) is installed, it needs to be calibrated and calibrated, and the strength of the electrical signal sent is determined according to the measured magnitude of the bearing reaction force.

5. The automatic anti-overturning system for curved girder bridges based on magnetic levitation technology according to claim 4, characterized in that: When the value of the force measurement sensor (51) is lower than the reaction force under the action of only the dead load, the force signal processor (54) starts to work, and at this time the signal transmitter (55) starts to send an electrical signal; When the value of the force measurement sensor (51) is 0, the bearing (4) is in a state of being off the support, and the electrical signal sent is in the strongest state.

6. The automated anti-overturning system for a curved girder bridge based on magnetic levitation technology according to claim 5, characterized in that: The magnetic levitation jacking device (64) includes a bottom steel plate (641) arranged on the curved girder bridge (1), a rectangular steel plate (642) arranged on the bottom steel plate (641), a magnetic force element (643) arranged on the rectangular steel plate (642), a support spring (644) arranged on the rectangular steel plate (642), and a bottom fixed steel plate (645) arranged on the pier (2); There are two groups of rectangular steel plates (642), which are connected up and down by support springs (644).

7. The automated anti-overturning system for a curved girder bridge based on magnetic levitation technology according to claim 6, characterized in that: The support spring (644) connects the rectangular steel plate (642) and the magnetic force element (643) into a whole, and is connected to the signal receiving terminal (61), the signal conversion unit (62), and the magnetic force control unit (63), and is powered by an external AC power supply.

8. The automated anti-overturning system for a curved girder bridge based on magnetic levitation technology according to claim 7, characterized in that: The magnetic force element (643) is encapsulated in a special groove opened on the rectangular steel plate (642). After the power is turned on, the magnetic poles of the upper and lower two groups of magnetic force elements (643) are the same, generating a repulsive force.

9. The automated anti-overturning system for a curved girder bridge based on magnetic levitation technology according to claim 8, characterized in that: When the signal receiving terminal (61) receives a signal, the magnetic force control unit (63) controls the magnitude of the magnetic force released by the magnetic force element (643) according to the strength of the electrical signal.

10. The automated anti-overturning system for curved girder bridges based on magnetic levitation technology according to claim 9, wherein: The maximum magnetic force generated by the magnetic force element (643) is calculated and determined according to the off-support state of the inner bearing (4) of the curved girder bridge, and a certain safety margin is considered.

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