Bridge limit device for multi-object displacement state control and long-span cable-stayed bridge

Abstract

The present invention is applicable to the field of bridge engineering, and provides a bridge limit device and a long-span cable-stayed bridge for multi-objective displacement state control. The above-mentioned bridge limit device for multi-objective displacement state control includes a concrete stop block arranged on the cross beam; a limit component fixedly installed on the concrete stop block; wherein, the limit component and the corbel of the beam part stop block are arranged at intervals to form a first-stage limit distance for limiting the displacement of the main beam, and the concrete stop block and the corbel of the beam part stop block are arranged at intervals to form a second-stage limit distance for limiting the displacement of the main beam. In the present invention, the limitation of the position between the limit component and the corbel of the beam part stop block and the limitation of the position between the concrete stop block and the corbel of the beam part stop block enable the bridge limit device for multi-objective displacement state control to have a multiple limit function, be able to reliably realize the position constraint between the main beam and the bridge tower, and have good durability, convenient maintenance and replacement operation, and remarkable economic benefits.

Description

Technical Field

[0001] The invention belongs to the field of bridge engineering, and particularly relates to a bridge limiting device for multi-objective displacement state control and a long-span cable-stayed bridge. Background Art

[0002] The design of the bridge tower of a long-span cable-supported bridge is controlled by longitudinal loads such as extreme longitudinal wind and braking force. Under the action of extreme longitudinal wind, braking force, and live load, the longitudinal bending moment and displacement of the bridge tower are relatively large. In order to relieve the in-plane stress of the bridge tower, it is necessary to limit the longitudinal displacement of the main girder to prevent the main girder from having excessive longitudinal displacement. At the same time, in combination with the requirements of temperature action, seismic deformation, and force, the main girder needs to meet the requirements of a certain longitudinal deformation for normal operation. Therefore, in related technologies, there is a problem of how to reliably limit the longitudinal displacement of the main girder. Summary of the Invention

[0003] In view of this, an embodiment of the invention provides a bridge limiting device for multi-objective displacement state control and a long-span cable-stayed bridge to solve the problem of how to reliably limit the longitudinal displacement of the main girder.

[0004] To solve the above problems, the technical solution of the embodiment of the invention is realized as follows:

[0005] A bridge limiting device for multi-objective displacement state control is arranged between the main girder and the cross beam of the bridge tower, and includes: a concrete block arranged on the cross beam; a limiting component fixedly installed on the concrete block, and the limiting component is used to abut against the beam block bracket on the main girder to limit the displacement of the main girder in the longitudinal direction of the bridge; wherein, a first-level limiting distance for limiting the displacement of the main girder is formed by the spaced arrangement of the limiting component and the beam block bracket, and a second-level limiting distance for limiting the displacement of the main girder is formed by the spaced arrangement of the concrete block and the beam block bracket.

[0006] Preferably, the concrete block includes: a body fixed on the cross beam; an installation groove arranged on the body, and the installation groove extends in the same direction as the longitudinal direction of the bridge; wherein, the limiting component is installed in the installation groove, and the opposite ends of the limiting component respectively extend beyond the outside of the installation groove in the longitudinal direction of the bridge.

[0007] Preferably, the limiting component includes: a horizontal steel plate arranged in the installation groove, and the horizontal steel plate is fixedly connected with the concrete block through shear pins; a stop member fixedly connected with the horizontal steel plate, and the opposite ends of the stop member extend in the longitudinal direction of the bridge and respectively extend beyond the outside of the installation groove.

[0008] Preferably, the concrete block further comprises: an anchor plate disposed in the installation groove and fixedly connected to the main body through anchor bars, and the horizontal steel plate is fixedly installed on the anchor plate through shear pins.

[0009] Preferably, the stop member comprises: a vertical steel plate fixedly connected to the horizontal steel plate, and opposite ends of the support extend along the longitudinal direction of the bridge; two transverse baffles respectively fixedly connected to two ends of the vertical steel plate, and the transverse baffles are used for abutting and limiting against the corbel of the beam block; wherein, the first-stage limit distance is formed between the transverse baffle and the corbel of the beam block.

[0010] Preferably, two vertical steel plates are fixedly connected to the horizontal steel plate, the two vertical steel plates are arranged at intervals, and the same ends of the two vertical steel plates are fixedly connected to the same transverse baffle.

[0011] An embodiment of the present invention further provides a long-span cable-stayed bridge, comprising: a main beam; a bridge tower for supporting the main beam, and the main beam is disposed above the cross beam of the bridge tower; a bridge bearing disposed on the cross beam, and the top end of the bridge bearing supports the bottom of the main beam; the above-mentioned bridge limiting device for multi-target displacement state control; a corbel of the beam block disposed at the bottom of the main beam, and the corbel of the beam block is used to cooperate with the bridge limiting device for multi-target displacement state control to limit the displacement range of the main beam in the longitudinal direction of the bridge; wherein, along the longitudinal direction of the bridge, at least two corbels of the beam block are arranged at intervals, and the bridge limiting device for multi-target displacement state control is disposed between the two corbels of the beam block.

[0012] Preferably, the long-span cable-stayed bridge further comprises: a main beam vertical bearing padstone disposed on the cross beam, and the bottom of the bridge bearing presses against the main beam vertical bearing padstone.

[0013] Preferably, the long-span cable-stayed bridge further comprises: a main beam wind-resistant bearing padstone disposed on the bridge tower, and the main beam wind-resistant bearing padstone is used for installing a wind-resistant bearing; wherein, the main beam wind-resistant bearing padstones are respectively disposed on both sides in the width direction of the main beam.

[0014] Preferably, the long-span cable-stayed bridge further comprises: a seismic damper, one end of which is connected to the cross beam and the other end is connected to the main beam, and the seismic damper is used to provide a movement resistance to the movement of the main beam in the longitudinal direction of the bridge.

[0015] A bridge limit device for multi-objective displacement state control provided by an embodiment of the present invention includes a concrete block and a limit component. The concrete block is fixed on the cross beam of the bridge tower, and the limit component is fixedly installed on the concrete block. The limit component is used to abut against the bracket corbel of the beam part on the main beam so as to limit the displacement of the main beam in the longitudinal direction of the bridge. Moreover, a first-stage limit distance is formed between the limit component and the bracket corbel of the beam part, and a second-stage limit distance is formed between the concrete block and the bracket corbel of the beam part. With the above settings, it is realized that through the limitation of the limit component, the displacement of the main beam in the longitudinal direction of the bridge can be limited within the first-stage limit distance, which can not only prevent the excessive displacement of the main beam, but also avoid transmitting too much force in the longitudinal direction of the bridge to the upper part of the bridge tower, thereby reducing the bending moment generated by the bridge tower in the longitudinal direction of the bridge. At the same time, through the limitation of the concrete block, the displacement of the main beam can be further limited within the second-stage limit distance, thereby preventing the damage of other parts between the main beam and the bridge tower due to excessive displacement of the main beam. The bridge limit device for multi-objective displacement state control has multiple limit functions, can reliably realize the position constraint between the main beam and the bridge tower, and has good durability and remarkable economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 is a schematic structural diagram of a bridge limit device for multi-objective displacement state control provided by an embodiment of the present invention;

[0018] Figure 2 is a side view of a bridge limit device for multi-objective displacement state control provided by an embodiment of the present invention;

[0019] Figure 3 is a front view of a bridge limit device for multi-objective displacement state control provided by an embodiment of the present invention;

[0020] Figure 4 is a schematic diagram of the positional relationship between a bridge limit device for multi-objective displacement state control provided by an embodiment of the present invention and the bracket corbel of the beam part;

[0021] Figure 5 is a schematic diagram of a bridge limit device for multi-objective displacement state control provided by an embodiment of the present invention installed on the bridge tower;

[0022] Figure 6 is another schematic diagram of a bridge limit device for multi-objective displacement state control provided by an embodiment of the present invention installed on the bridge tower.

[0023] Description of Reference Numerals

[0024] 1. Bridge limit device; 11. Concrete block; 111. Body; 112. Installation groove; 113. Anchor plate; 114. Anchor bar; 12. Limit component; 121. Horizontal steel plate; 122. Stop member; 1221. Vertical steel plate; 1222. Transverse baffle; 123. Shear pin; L1. First-stage limit distance; L2. Second-stage limit distance; 21. Main girder; 22. Bridge tower; 23. Bridge bearing; 24. Bracket of beam block on main girder; 25. Vertical bearing pad stone of main girder; 26. Wind-resistant bearing pad stone of main girder. Detailed Description of the Invention

[0025] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] For each specific technical feature described in the specific embodiments, they can be combined in any suitable manner without conflict. For example, different embodiments and technical solutions can be formed by combining different specific technical features. To avoid unnecessary repetition, various possible combination methods of each specific technical feature in the present invention will not be described separately.

[0027] As Figure 1 and Figure 5 shown, a bridge limit device 1 for multi-objective displacement state control provided by an embodiment of the present invention is mainly used to limit the longitudinal displacement of the main girder 21 in order to relieve the in-plane stress of the bridge tower 22 when the longitudinal moment and displacement of the bridge tower 22 are relatively large under factors such as extreme longitudinal wind, braking force, live load or earthquake. Therefore, the bridge limit device 1 for multi-objective displacement state control is provided between the main girder 21 and the cross beam of the bridge tower 22 to be able to limit the longitudinal displacement of the main girder 21. Among them, the above longitudinal direction and the following longitudinal direction along the bridge both refer to the vehicle driving direction or the length direction of the main girder 21.

[0028] As Figure 1 and Figure 2 shown, the bridge limit device 1 for multi-objective displacement state control includes a concrete block 11 and a limit component 12. The concrete block 11 is arranged on the cross beam. The concrete block 11 is usually a reinforced concrete structure, cast in situ on the cross beam and fixedly connected with the cross beam to form an integral body. The limit component 12 is fixedly installed on the concrete block 11. The limit component 12 is used to cooperate with the bracket of the beam block 24 on the main girder 21 (refer to Figure 4)There is no conflict, so as to limit the displacement of the main beam 21 in the longitudinal direction of the bridge. Specifically, the limiting component 12 is fixedly installed on the concrete block 11 through shear pins, and the installed position is kept at an interval from the corbel 24 of the beam block, so that a first-stage limiting distance L1 for limiting the displacement of the main beam 21 is formed between the limiting component 12 and the corbel 24 of the beam block. The concrete block 11 and the corbel 24 of the beam block are also kept at an interval, so that a second-stage limiting distance L2 for limiting the displacement of the main beam 21 is formed between the concrete block 11 and the corbel 24 of the beam block. With such a setting, by limiting the movement direction of the main beam 21 by the limiting component 12, the displacement of the main beam 21 in the longitudinal direction of the bridge can be limited within the first-stage limiting distance L1, which not only can prevent the main beam 21 from having excessive displacement, but also can avoid transmitting too much force in the longitudinal direction of the bridge to the upper part of the bridge tower 22, thereby reducing the bending moment generated by the bridge tower 22 in the longitudinal direction of the bridge, and realizing the limitation of the displacement of the main beam 21 under factors such as extreme longitudinal wind, braking force, and live load displacement. When the disturbance factors such as earthquake are large and the generated force exceeds the bearing capacity that the fasteners such as shear pins for fixedly installing the limiting component 12 on the concrete block 11 can bear and the fasteners are sheared, at this time, the limiting component 12 loses the function of restraining and limiting, and the displacement of the main beam 21 can be further limited within the second-stage limiting distance L2 through the contact between the concrete block 11 and the corbel 24 of the beam block, so as to prevent the situation that the displacement of the main beam 21 is further excessive and the seismic damper between the main beam 21 and the bridge tower 22 is damaged. Moreover, after the earthquake, the limiting component 12 can be fixedly installed on the concrete block 11 again by replacing the fasteners, realizing the reuse of the limiting component 12, and the maintenance and replacement operation is convenient.

[0029] For the bridge limiting device 1 for multi-objective displacement state control provided by the embodiment of the present invention, the limitation of the position between the limiting component 12 and the corbel 24 of the beam block and the limitation of the position between the concrete block 11 and the corbel 24 of the beam block enable the bridge limiting device 1 for multi-objective displacement state control to have a multiple limiting function, be able to reliably realize the position constraint between the main beam 21 and the bridge tower 22, and have good durability, convenient maintenance and replacement operation, and remarkable economic benefits.

[0030] Specifically, the bridge limit device 1 with multi-objective displacement state control is reasonably configured, with simple component replacement and easy maintenance. Its theoretical calculation is clear, the target displacement state is clearly controllable, it has multiple functions, excellent functionality and durability, and prominent economy. Moreover, by setting the bridge limit device 1 with multi-objective displacement state control and arranging a filler plate between the beam block corbel 24 and the concrete block 11, temporary locking during construction can be achieved, and the usage functions are diverse. Such a bridge limit device 1 with multi-objective displacement state control meets the longitudinal displacement limit function requirements of long-span cable-stayed bridges in all stages and multiple working conditions from the construction stage to the normal operation state and seismic conditions, greatly improving the force and deformation of the bridge tower 22 of long-span cable-stayed bridges. At the same time, it meets the longitudinal deformation requirements, with significant social and economic benefits and high innovation, and has important engineering value.

[0031] As Figures 1 to 4 shown, in the embodiment of the present invention, the concrete block 11 includes a body 111 and a mounting groove 112. The body 111 is a reinforced concrete structure, preferably formed by in-situ casting and fixed on the cross beam. The shape of the formed body 111 is usually a cuboid, and the width direction of the body 111 is set to be the same as the longitudinal direction of the bridge. The mounting groove 112 is arranged along the width direction of the body 111, and the length direction of the mounting groove 112 extends in the same direction as the longitudinal direction of the bridge, so that the length dimension of the mounting groove 112 completely extends on the width of the body 111. Specifically, the mounting groove 112 is formed by being recessed into the interior of the body 111, so that the overall shape of the body 111 provided with the mounting groove 112 is generally in the shape of a "concave". The limiting component 12 is installed in the mounting groove 112, and the opposite ends of the limiting component 12 extend beyond the outside of the mounting groove 112 in the longitudinal direction of the bridge respectively. That is, the length direction of the limiting component 12 is kept the same as the longitudinal direction of the bridge and installed in the mounting groove 112, and the opposite ends of the limiting component 12 extend beyond the outside of the mounting groove 112 in the longitudinal direction of the bridge respectively. At this time, in the normal state, the distance between the end of the limiting component 12 and the beam block corbel 24 is the first-stage limiting distance L1. In this way, when the main beam 21 displaces in the longitudinal direction of the bridge, the beam block corbel 24 can first come into contact with the end of the limiting component 12 to achieve limiting.

[0032] As Figures 1 to 4As shown, in a possible implementation, the limit component 12 includes a horizontal steel plate 121 and a stopper 122. The horizontal steel plate 121 is arranged in the installation groove 112, and the horizontal steel plate 121 is fixedly connected to the concrete block 11 through shear pins 123. The stopper 122 is fixedly connected to the horizontal steel plate 121, and the fixed connection method preferably uses full penetration welding to form an integral structure. The opposite ends of the stopper 122 extend in the longitudinal direction of the bridge, and respectively extend beyond the outside of the installation groove 112. Thus, when the stopper 122 abuts against the corbel of the beam block 24, the displacement of the main beam 21 in the longitudinal direction of the bridge can be limited. In the embodiment of the present invention, the shear pins 123 for fixedly connecting the horizontal steel plate 121 and the concrete block 11 are selected according to the design internal force of the shear bearing capacity they can withstand. The horizontal steel plate 121 is provided with holes for the shear pins 123 to pass through, and at the same time, the concrete block 11 is also provided with components that can be fixedly connected to the shear pins 123. Through the fixed connection of the shear pins 123, the horizontal steel plate 121 can be reliably fixed on the concrete block 11. When the force generated by the main beam 21 exceeds the bearing capacity that the shear pins 123 can withstand, the shear pins 123 can also break, so that the corbel of the beam block 24 contacts the concrete block 11 for limiting, achieving reliable limitation of the displacement of the main beam 21 in the longitudinal direction of the bridge.

[0033] As Figures 1 to 4 shown, in a possible implementation, the concrete block 11 further includes an anchor plate 113. The anchor plate 113 is arranged in the installation groove 112 and is fixedly connected to the main body 111 through anchor bars 114. Since the main body 111 is formed by casting a reinforced concrete structure, the anchor bars 114 are pre-buried in the main body 111, and then concrete is poured. By pre-burying the anchor bars 114 to fix the anchor plate 113, the firmness of the connection between the anchor plate 113 and the main body 111 is enhanced. In the embodiment of the present invention, the anchor plate 113 is arranged on the surface of the main body 111 after being connected to the anchor bars 114. Moreover, the anchor plate 113 is provided with pin holes for installing the shear pins 123, and the shear pins 123 pass through the holes on the horizontal steel plate 121 and are screwed into the holes on the anchor plate 113 to realize the installation of the horizontal steel plate 121 on the anchor plate 113. In a specific setting, a plurality of shear pins 123 and anchor bars 114 are provided, and a plurality of holes are respectively provided on the anchor plate 113 and the horizontal steel plate 121. Moreover, both the anchor plate 113 and the horizontal steel plate 121 are plate-shaped members.

[0034] As Figure 1 and Figure 2As shown, in the embodiment of the present invention, the stopper 122 includes a vertical steel plate 1221 and two transverse baffles 1222. The vertical steel plate 1221 is fixedly connected to the horizontal steel plate 121 by welding, and the two opposite ends of the support extend along the bridge direction and at least extend to the outside of the installation groove 112. The two transverse baffles 1222 are respectively fixedly connected to the two ends of the vertical steel plate 1221. The first level limit distance L1 (refer to Figure 4 ) is formed between the transverse baffle 1222 and the beam block bracket 24. Specifically, the two transverse baffles 1222 are used to conflict with the beam block bracket 24, and then the blocking force is transmitted through the vertical steel plate 1221 to realize the function of limiting.

[0035] like Figure 1 and Figure 2 As shown, in a possible embodiment, two vertical steel plates 1221 are fixedly connected to the horizontal steel plate 121, and the two vertical steel plates 1221 are spaced apart. Moreover, the same end of the two vertical steel plates 1221 is fixedly connected to the same horizontal baffle 1222.

[0036] The bridge limit device 1 with multi-objective displacement state control provided in the embodiment of the present invention is provided with a concrete stopper 11 and a limiter assembly 12, and the limiter assembly 12 is fixedly installed on the concrete stopper 11. A first-level limit distance L1 is formed between the limiter assembly 12 and the beam stopper bracket 24 on the main beam 21, and a second-level limit distance L2 is formed between the concrete stopper 11 and the beam stopper bracket 24. In this way, the transverse baffle 1222 in the limiter assembly 12 interferes with the beam stopper bracket 24, thereby limiting the displacement of the main beam 21 in the longitudinal direction of the bridge to within the first-level limit distance L1, preventing the main beam 21 from displacing too much, and further preventing the excessive force in the longitudinal direction of the bridge from being transmitted to the upper part of the bridge tower 22, thereby reducing the bending moment of the bridge tower 22 in the longitudinal direction of the bridge. The limitation between the concrete stopper 11 and the beam stopper corbel 24 further limits the displacement of the main beam 21 to within the second-level limiting distance L2, thereby preventing further displacement of the main beam 21 and damage to other parts between the main beam 21 and the bridge tower 22. The multiple limiting functions of the multi-target displacement state control bridge limiting device 1 achieve reliable limitation of the displacement of the main beam 21.

[0037] like Figure 5 and Figure 6As shown in the figure, in an embodiment of the present invention, a long-span cable-stayed bridge is further provided, which includes a main girder 21, bridge towers 22, bridge bearings 23, beam block corbels 24, and the above-mentioned bridge limit device 1 for multi-objective displacement state control. The main girder 21 is erected between two adjacent bridge towers 22, and a passable road surface is formed on the top surface of the main girder 21. The bridge towers 22 are arranged in the construction site and are used to support the main girder 21; multiple bridge towers 22 can be arranged at intervals as required, and the main girder 21 is arranged above the cross beams of the bridge towers 22. The bridge bearings 23 are arranged on the cross beams, and the top ends of the bridge bearings 23 support the bottom of the main girder 21. Thus, through the support of the bridge bearings 23, the main girder 21 can be suspended relative to the cross beam, and the main girder 21 can move relative to the cross beam in the longitudinal direction of the bridge to meet the requirement that the main girder 21 can deform within the design range. The beam block corbels 24 are arranged at the bottom of the main girder 21, and the beam block corbels 24 are used to cooperate with the bridge limit device 1 for multi-objective displacement state control to limit the displacement range of the main girder 21 in the longitudinal direction of the bridge, so as to prevent the displacement deviation of the main girder 21 in the longitudinal direction of the bridge from being too large and causing damage to the overall structure of the long-span cable-stayed bridge. Specifically, in actual setting, at least two beam block corbels 24 are arranged at intervals along the longitudinal direction of the bridge, and the bridge limit device 1 for multi-objective displacement state control is arranged between the two beam block corbels 24. In this way, when the main girder 21 moves repeatedly in the longitudinal direction of the bridge, the bridge limit device 1 for multi-objective displacement state control can be used for limiting, ensuring that the displacement change of the main girder 21 can be maintained within the set range. Moreover, by providing the above-mentioned bridge limit device 1 for multi-objective displacement state control, the long-span cable-stayed bridge can achieve multiple position limitations, meet the limit requirements under different disturbance factors, and effectively ensure the stability of the overall structure of the long-span cable-stayed bridge and the safety of use.

[0038] As Figure 5 and Figure 6 shown, in the implementation of the present invention, the long-span cable-stayed bridge further includes a main girder vertical bearing cushion stone 25. The main girder vertical bearing cushion stone 25 is arranged on the cross beam, and the bottom of the bridge bearing 23 presses against the supported cushion stone. In this way, the main girder vertical bearing cushion stone 25 is used to increase the bearing area of the bridge bearing 23 on the cross beam, thereby improving the stability of supporting the main girder 21.

[0039] As Figure 5 and Figure 6As shown, in the implementation of the present invention, the long-span cable-stayed bridge further includes a main girder wind-resistant bearing pier 26. The main girder wind-resistant bearing pier 26 is arranged on the bridge tower 22 and is used for installing the wind-resistant bearing, and the wind-resistant bearing is used to limit the lateral displacement of the main girder 21. In a specific setting, wind-resistant bearings are respectively arranged on both sides in the width direction of the main girder 21. Therefore, main girder wind-resistant bearing piers 26 are respectively arranged on both sides in the width direction of the main girder 21, and the second pier is used to support the installation of the wind-resistant bearing, and at the same time, the stress area can be increased to improve the stability of the support.

[0040] In a possible implementation scheme, the long-span cable-stayed bridge further includes a seismic damper. One end of the seismic damper is connected to the cross beam, and the other end of the seismic damper is connected to the main girder 21. The seismic damper is used to provide a movement resistance to the movement of the main girder 21 in the longitudinal direction of the bridge, so as to enhance the reliable limitation of the displacement change of the main girder 21 in the longitudinal direction of the bridge. In a specific setting, the seismic damper can be a spring member, a hydraulic member, etc.

[0041] In the embodiment of the present invention, the first-stage limit distance L1 formed by the bridge limit device for multi-objective displacement state control is comprehensively set in combination with the bearing capacity of the bridge tower and the foundation, aiming to reduce the longitudinal bending moment of the bridge tower under the action of the operating load. Under most working conditions such as the action of vehicle load + temperature, the main girder can freely expand and contract longitudinally. When a combination of large longitudinal wind, temperature force, braking force, live load displacement, etc. occurs, the longitudinal displacement of the main girder can be limited within a certain range to avoid transmitting too much longitudinal force to the top of the tower, thereby reducing the longitudinal bending moment of the bridge tower. The setting of the second-stage limit distance L2 aims to, during an earthquake, when the shear force borne by the shear pin exceeds the bearing capacity and is cut off, the main girder longitudinally becomes a longitudinal floating system. At this time, the seismic damper plays a role to achieve the goal of seismic isolation and vibration reduction. After the earthquake ends, reinstall the shear pin to ensure the longitudinal force of the bridge tower under the operating load again. Moreover, under an excessive earthquake action, it can also prevent the longitudinal displacement from exceeding the stroke of the seismic damper and causing damage to the seismic damper.

[0042] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bridge limit device for multi-target displacement state control is arranged between the main girder and the cross beam of the bridge tower, and is characterized in that, include: A concrete stopper is provided on the crossbeam, the concrete stopper comprising a body and a mounting groove, the mounting groove being provided on the body and extending in the same direction as the longitudinal direction of the bridge; A limit assembly is fixedly installed in the installation slot by fasteners, with opposite ends of the limit assembly extending outside the installation slot in the longitudinal direction of the bridge; the limit assembly is arranged between adjacent beam stopper brackets on the main beam and is used to abut against the beam stopper brackets to limit the displacement of the main beam in the longitudinal direction of the bridge; The spacing between the limiting assembly and the beam stopper bracket forms a first-level limiting distance for limiting the displacement of the main beam, and the spacing between the concrete stopper and the beam stopper bracket forms a second-level limiting distance for limiting the displacement of the main beam. The second-level limiting distance is greater than the first-level limiting distance. When the main beam is displaced in the direction along the bridge, the beam block corbel first conflicts with the limiting assembly. When the force of the main beam causes the fastener to cut off so that the main beam continues to displace in the direction along the bridge and the displacement exceeds the first-level limiting distance, the beam block corbel crosses the first-level limiting distance and conflicts with the concrete block, thereby limiting the displacement of the main beam to the second-level limiting distance.

2. The bridge limit device for multi-object displacement state control according to claim 1, characterized in that The limiting component includes: a horizontal steel plate, disposed in the mounting groove, the horizontal steel plate being fixedly connected to the concrete block via shear pins; A stopper is fixedly connected to the horizontal steel plate, and opposite ends of the stopper extend in the direction of the longitudinal bridge and respectively extend beyond the outside of the mounting groove.

3. The bridge limit device for multi-object displacement state control according to claim 2, characterized in that, The concrete block also includes: An anchor plate is arranged in the installation groove and fixedly connected to the main body through anchor bars. The horizontal steel plate is fixedly installed on the anchor plate through the shear pins.

4. The bridge limit device for multi-object displacement state control according to claim 2, characterized in that, The stopper comprises: A vertical steel plate is fixedly connected to the horizontal steel plate, and opposite ends of the vertical steel plate extend along the longitudinal direction of the bridge; Two transverse baffles are fixedly connected to both ends of the vertical steel plate, and the transverse baffles are used to abut against the beam block corbels to limit the position; Wherein, the first level limiting distance is formed between the transverse baffle and the beam block corbel.

5. The bridge limit device for multi-object displacement state control according to claim 4, characterized in that, Two vertical steel plates are fixedly connected to the horizontal steel plate, the two vertical steel plates are spaced apart, and the same end of the two vertical steel plates is fixedly connected to the same horizontal baffle.

6. A long-span cable-stayed bridge, characterized in that, include: main beam; a bridge tower, used to support the main beam, wherein the main beam is arranged above the cross beam of the bridge tower; a bridge support, arranged on the cross beam, wherein the top end of the bridge support is supported on the bottom end of the main beam; The bridge limiting device for multi-objective displacement state control according to any one of claims 1 to 5; A beam stopper bracket is provided at the bottom of the main beam, and is used to cooperate with the bridge limit device controlled by the multi-target displacement state to limit the displacement range of the main beam in the direction along the bridge; Among them, along the bridge longitudinal direction, at least two beam part bumper brackets are arranged at intervals, and the multi-target displacement state controlled bridge limiting device is arranged between the two beam part bumper brackets.

7. The long-span cable-stayed bridge according to claim 6, characterized in that, The long-span cable bridge further includes: The main beam vertical bearing pier is arranged on the cross beam, and the bottom of the bridge bearing presses against the main beam vertical bearing pier.

8. The long-span cable-stayed bridge according to claim 6, wherein, The long-span cable bridge further includes: The main beam wind-resistant bearing pier is arranged on the bridge tower, and the main beam wind-resistant bearing pier is used for installing the wind-resistant bearing; Among them, the main beam wind-resistant bearing piers are respectively arranged on both sides in the width direction of the main beam.

9. The long-span cable bridge according to claim 6, characterized in that, The long-span cable bridge further includes: The seismic damper, one end of which is connected to the cross beam and the other end is connected to the main beam, and the seismic damper is used to provide moving resistance for the movement of the main beam in the bridge longitudinal direction.

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