Cooperative seismic isolation structure for bridge

Abstract

The utility model discloses a collaborative shock insulation structure for a bridge, which relates to the technical field of bridge shock resistance, and comprises an elastic supporting component, a plurality of elastic connecting pieces, a plurality of elastic connecting pieces and a plurality of elastic connecting pieces, the two box girders are arranged on the two sides of a bridge respectively. The elastic supporting component comprises an inhaul cable and a plurality of elastic pieces, the elastic pieces are evenly distributed on the opposite faces of the two box girders, and the elastic pieces on the two box girders are in one-to-one correspondence; the inhaul cable is connected between the two box girders. By the adoption of the scheme, when asynchronous displacement occurs, relative displacement of the two bridges is controlled through coordination of the elastic pieces and the inhaul cables, violent collision caused by excessive deviation of the two bridges can be avoided, and therefore violent collision is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge seismic resistance, and particularly relates to a collaborative isolation structure for bridges. Background Art

[0002] China is a country with frequent strong earthquakes. Bridges are an important part of the lifeline system, and it is difficult to repair damaged bridges. Therefore, bridge seismic design has been increasingly emphasized, and at the same time, it has actively promoted the development of bridge isolation and damping devices.

[0003] The working principle of the isolation and damping device is mainly based on extending the natural vibration period of the structure and reducing the structural displacement, so that the structural system can achieve a certain isolation or damping effect, thereby ensuring the seismic performance of the structure. By designing a flexible support structure, the natural vibration period of the structure is extended, the structural acceleration response is reduced, and the seismic response under earthquake action is weakened. This is achieved by increasing the flexibility and damping of the structure, thereby reducing the impact of earthquakes on the structure. While extending the natural vibration period of the structure, the structural displacement will increase. In order to reduce this part of the increased structural displacement, some damper-type energy dissipation components can be applied in the structural design. When an earthquake occurs, as the structural stress and deformation increase, these components quickly change from the original elastic state to the plastic state and generate damping to dissipate the earthquake energy, thereby increasing the energy dissipation capacity and damping value of the structure.

[0004] When the bridge deck is relatively wide, due to the beautiful shape of the double-track bridge, the open field of vision on the bridge deck, and the strong traffic capacity, it can solve the problems of distortion and shear lag caused by the over-wide single-track bridge deck, and at the same time avoid reasons such as transverse uneven settlement. Therefore, the double-track bridge scheme is often adopted.

[0005] In the municipal engineering in high-intensity earthquake areas, when it is necessary to widen and reconstruct the existing bridge on the original site using a double-track bridge, due to reasons such as the limited width of the median strip of the bridge approach, the lateral structural net clearance between the two bridges is very small. At this time, when using the conventional seismic isolation and damping bridge design scheme, the requirement for controlling the lateral displacement of the bridge is very high, and a large number of dampers with large specifications must be used to meet the requirement of avoiding collision between the two bridges under earthquake conditions.

[0006] In this case, because there is no adjustment space in the functional area, the gap between the two bridges cannot meet the deformation gap required for seismic isolation and damping bridges. At the same time, to avoid collision between the two bridges under earthquake conditions, large-tonnage dampers are usually used to control the bridge deformation, which has a high cost and great construction difficulty. Content of the Utility Model

[0007] In order to solve the deficiencies of the prior art, the purpose of the utility model is to provide a collaborative isolation structure for bridges. By adopting this solution, when non-synchronous displacement occurs, the relative displacement of the two bridges is coordinated and controlled by elastic members and cables, which can avoid violent collision after the two bridges deviate from each other too much, thereby avoiding severe collision.

[0008] The utility model is realized by the following technical solutions:

[0009] A collaborative seismic isolation structure for a bridge, comprising:

[0010] Elastic support members, which are arranged between two adjacent box girders; the two box girders are respectively arranged on both sides of the bridge;

[0011] The elastic support members include cables and a plurality of elastic members. The plurality of elastic members are evenly distributed on the opposite surfaces of the two box girders, and the elastic members on the two box girders correspond to each other one by one;

[0012] The cable is connected between the two box girders.

[0013] Compared with the prior art, in the conventional seismic isolation and vibration reduction bridge design scheme, the requirement for controlling the lateral displacement of the bridge is very high. A large number of dampers with large specifications must be used to meet the requirement of avoiding collision under the seismic condition of a double-track bridge. In this case, due to the lack of adjustment space in the functional area, the gap between the double-track bridges cannot meet the deformation gap required for seismic isolation and vibration reduction bridges. At the same time, to avoid collision between the two bridges under seismic conditions, large-tonnage dampers are usually used to control the deformation of the bridge, resulting in high cost and difficult construction. The utility model provides a collaborative seismic isolation structure for a bridge. With this solution, when asynchronous displacement occurs, the relative displacement of the two bridges is coordinated and controlled by the elastic members and the cables, which can avoid violent collision after the two bridges deviate from each other too much, thus avoiding severe collision, and it has low cost and low construction difficulty. In the specific solution, it includes elastic support members arranged between two adjacent box girders. The two box girders are located on both sides of the bridge. The elastic support members include elastic members and cables. Among them, the elastic members are rubber blocks, which can be directly attached to the side surface of the box girder by pasting, and the elastic members on the two box girders correspond to each other one by one. The distance between two opposite elastic members is less than the distance between two adjacent box girders, that is, the distance between two adjacent cross beams. In this way, when the distance between the two box girders approaches, the two elastic members first come into contact and are compressed, so as to resist impact and avoid hard collision between the two bridges under seismic conditions; in addition, a cable is also connected between the two box girders. When the two box girders move away from each other, the tension of the cable can prevent the two bridges from deviating from each other too much, thereby reducing the yaw amplitude of the box girder. Therefore, the relative displacement of the two bridges is coordinated and controlled by the elastic members and the cables, which can avoid violent collision after the two bridges deviate from each other too much, thus avoiding severe collision.

[0014] To improve the seismic performance of the bridge, along the length direction of the box girder, a number of transversely arranged cross beams are sequentially arranged in the box girder. A pier is provided at the bottom of each cross beam, and a seismic isolation and energy dissipation bearing is provided between the cross beam and the pier. The plane of the seismic isolation and energy dissipation bearing is located on the center line of the cross beam. The cross beams on the two box girders correspond to each other one by one, and an elastic member is correspondingly arranged at each cross beam. The elastic member and the plane of the seismic isolation and energy dissipation bearing are located on the same axis. In this solution, along the length direction of the box girder, that is, the road direction, a number of cross beams are arranged. A pier is arranged at each cross beam position, and two seismic isolation and energy dissipation bearings are arranged on the center line of the pier transversely. Among them, the piers on the two box girders are symmetrically arranged along the road center line; when the two bridges have the same-direction and same-frequency displacement, the elastic member and the cable do not work, and at this time, the seismic isolation and energy dissipation bearing realizes the seismic isolation and energy dissipation function.

[0015] As an implementation manner of the cable, and to ensure that it does not prevent the rotation of the beam body at the bearing under normal working conditions, a cable is arranged at each two corresponding elastic members. The cable is arranged along the length direction of the cross beam. The two ends of the cable respectively pass through the two elastic members, penetrate through the two box girders on both sides respectively, and are connected to the anchoring device on the box girder; the cable is arranged directly above the center line of the seismic isolation and energy dissipation bearing. In this solution, the elastic member and the cable are both arranged at the center line position of the corresponding seismic isolation and energy dissipation bearing, which can realize the rapid positioning of each component during the installation process and ensure that it does not prevent the rotation of the beam body at the bearing under normal working conditions; in addition, the two ends of the cable respectively pass through the box girders on both sides and realize the tensioning through the anchoring device.

[0016] As the specific structure of the anchoring device, the anchoring device includes a pressing plate. The end of the cable is fixed to the middle of the pressing plate. The circumferential end of the pressing plate is connected to the box girder through a number of bolts. A second rubber block is arranged between the pressing plate and the side wall of the box girder. In this solution, the pressing plate is fixed on the side wall of the box girder through a number of bolts. At this time, there is a gap between the pressing plate and the box girder, and a second rubber block is arranged in the gap, which plays a certain buffering role while realizing the anchoring and tensioning.

[0017] To facilitate the rapid replacement and maintenance of the cable, the anchoring device further includes a pipe, which is embedded in the box girder and used for the cable to pass through.

[0018] As another implementation of the stay cable, a scissors cross cable member is arranged between the two box girders. The scissors cross cable member is formed by arranging two sections of the stay cables in a scissors cross pattern from one end to the other end of the box girder. Each protruding vertex in the middle of the scissors cross cable member is located at the position of the elastic member. In this solution, the scissors cross cable member is formed by two sections of stay cables crossing successively to form a connected multi-section cross shape. Each of its protruding vertices is connected to the cross beam and is located at the position of the elastic member, preferably at the center line of the same plane of the seismic isolation bearing. In this way, the counter-tension at the box girder can be realized, avoiding violent collision after the two bridges deviate from each other too much, and thus avoiding severe collision. In addition, anchoring devices can also be arranged at both ends of the two sections of stay cables. Through the anchoring devices and the longer stay cables, a buffering effect can be achieved under seismic action forces. Collars can also be arranged at the ends of the cross beam so that the protruding vertices of the scissors cross cable member are movably connected to the collars to achieve movable connection and enable the entire stay cable to be tightened synchronously.

[0019] To collect seismic response data, the elastic member uses a first rubber block. A liquid storage bladder, a liquid discharge pipe, and a collection pipe are arranged inside the first rubber block. The liquid storage bladder is filled with liquid. The bottom of the liquid discharge pipe is communicated with the inside of the liquid storage bladder. The top of the liquid discharge pipe extends out of the first rubber block and is in a U shape. The downwardly bent part at the top of the liquid discharge pipe faces and is directly opposite to the opening position of the collection pipe. In this solution, the elastic member is a rubber block. A liquid storage bladder is arranged inside the rubber block, and the liquid storage bladder stores liquid. The liquid is an incompressible liquid and can basically maintain its volume unchanged under general environmental conditions. A liquid discharge pipe is communicated with the upper end of the liquid storage bladder, and the upper end of the liquid discharge pipe is in a U shape. In this way, under the action of temperature, the two bridges are slightly squeezed against each other, and the liquid in the rubber is squeezed into the liquid discharge pipe but will not cross the U-shaped pipe at the top. Under seismic conditions, the squeezing force causes the liquid to cross the U-shaped pipe and thus enter the collection pipe. After the earthquake ends, the working state of the device during the earthquake can be judged according to the amount of liquid in the collection pipe, and at the same time, the seismic response data of the bridge can be collected and applied to seismic research.

[0020] To provide enough liquid to collect seismic response data, the stay cable includes a stay cable body, a drain hose is arranged on the axis of the stay cable body, and a plurality of strands are evenly distributed in the circumferential direction of the drain hose; the inside of the drain hose is filled with liquid, and the end of the drain hose is provided with a liquid collection device. In this solution, through special preparation treatment of the stay cable, a drain hose is arranged on the axis of the stay cable body, and a plurality of strands are wound around the circumferential direction of the drain hose for wrapping. In this way, the initial tension is achieved through the strands. When under earthquake conditions, the stay cable bears a large tensile force and deforms itself. The circumferential strands squeeze towards the central drain hose, thereby discharging the liquid in the drain hose into the liquid collection device. Therefore, by the amount of liquid collected, the magnitude of the tensile force received can be judged, so as to collect seismic response data; in addition, it can also be set to detect by means of a tensile force sensor, that is, a tensile force sensor is arranged on the stay cable.

[0021] Since the double - deck bridge is generally relatively wide and the gap between adjacent box girders is small, the maintenance vehicle cannot perform maintenance on the middle position of the double - deck bridge. Therefore, for daily maintenance and repair, manual crawling is used to enter for maintenance. An inspection platform is arranged between the two box girders. The inspection platform adopts a wire rope net, and the wire rope net is sequentially connected from one end to the other end of the box girder and is parallel to the box girder; the stay cable is used to support the inspection platform. That is, the stay cable is located below the inspection platform for support.

[0022] To facilitate the entry of maintenance personnel, inspection manholes communicating with the upper space of the wire rope net are reserved at both ends of the box girder. A movable ladder can be set at the abutment position, and through the movable ladder, the reserved inspection manhole can be entered, so as to enter the inspection platform for maintenance.

[0023] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0024] 1. For a collaborative seismic isolation structure for bridges provided by the present utility model, adopting this solution, when non - synchronous displacement occurs, the relative displacement of the two bridges is coordinated and controlled by the elastic member and the stay cable, which can avoid the two bridges from deviating from each other too much and then colliding violently, thus avoiding violent collisions.

[0025] 2. For a collaborative seismic isolation structure for bridges provided by the present utility model, adopting this solution, under the action of temperature, the two bridges are slightly squeezed against each other, and the liquid in the rubber is squeezed into the drain pipe but will not cross the U - shaped pipe at the top. When under earthquake conditions, the squeezing force causes the liquid to cross the U - shaped pipe and thus enter the collection pipe. After the earthquake ends, the working state of the device during the earthquake can be judged according to the amount of liquid in the collection pipe, and at the same time, the bridge seismic response data can be collected and applied to earthquake research. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions of the exemplary embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings. In the drawings:

[0027] Figure 1 Schematic diagram of the bridge structure provided by the present utility model;

[0028] Figure 2 Front view of the bridge with a collaborative isolation structure according to an embodiment provided by the present utility model;

[0029] Figure 3 Cross-sectional view of the bridge with a collaborative isolation structure according to an embodiment provided by the present utility model;

[0030] Figure 4 Schematic diagram of the anchoring device structure according to an embodiment provided by the present utility model;

[0031] Figure 5 Front view of the bridge with a collaborative isolation structure according to another embodiment provided by the present utility model;

[0032] Figure 6 Cross-sectional view of the bridge with a collaborative isolation structure according to another embodiment provided by the present utility model;

[0033] Figure 7 Front view of the bridge with a collaborative isolation structure according to another embodiment provided by the present utility model after setting up a maintenance platform;

[0034] Figure 8 Cross-sectional view of the bridge with a collaborative isolation structure according to another embodiment provided by the present utility model after setting up a maintenance platform;

[0035] Figure 9 Internal schematic diagram of the elastic member according to another embodiment provided by the present utility model;

[0036] Figure 10 Simple internal diagram of the cable according to another embodiment provided by the present utility model;

[0037] Figure 11 Cross-sectional view of the cable according to another embodiment provided by the present utility model.

[0038] Marks in the drawings and corresponding component names:

[0039] 1 - Cable, 101 - Cable body, 102 - Drainage hose, 103 - Strand, 2 - Elastic member, 201 - Liquid storage sac, 202 - Drainage pipe, 203 - Collection pipe, 3 - Box girder, 301 - Cross beam, 4 - Seismic isolation and vibration reduction bearing, 5 - Anchoring device, 501 - Pressing plate, 502 - Bolt, 503 - Second rubber block, 504 - Pipe, 6 - Maintenance platform, 7 - Maintenance access hole, 8 - Pier and abutment. Detailed implementation mode

[0040] To make the purpose, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with embodiments and drawings. The illustrative implementation modes and descriptions of the present utility model are only used to explain the present utility model and shall not be used to limit the present utility model.

[0041] Embodiment 1:

[0042] This Embodiment 1 provides a collaborative seismic isolation structure for a bridge, as Figures 1 - 11 shown, including:

[0043] An elastic support member, which is arranged between two adjacent box girders 3; the two box girders 3 are respectively arranged on both sides of the bridge;

[0044] The elastic support member includes a cable 1 and a plurality of elastic members 2, and the plurality of elastic members 2 are evenly distributed on the opposite surfaces of the two box girders 3, and the elastic members 2 on the two box girders 3 correspond to each other one by one;

[0045] The cable 1 is connected between the two box girders 3.

[0046] In the prior art, for the conventional seismic isolation and vibration reduction bridge design scheme, the requirement for controlling the lateral displacement of the bridge is very high. A large number of dampers with large specifications must be used to meet the requirement of avoiding the collision of the two-span bridge under earthquake conditions. In this case, due to the lack of adjustment space in the functional area, the gap between the two-span bridge cannot meet the deformation gap required for the seismic isolation and vibration reduction bridge. At the same time, to avoid the collision of the two bridges under earthquake conditions, large-tonnage dampers are usually used to control the bridge deformation, resulting in high cost and great construction difficulty. The utility model provides a cooperative seismic isolation structure for bridges. With this scheme, when asynchronous displacement occurs, the relative displacement of the two bridges is coordinated and controlled by the elastic member 2 and the cable 1, which can avoid the violent collision after the two bridges deviate from each other too much, thus avoiding severe collision, and its cost is low and the construction difficulty is low. In the specific scheme, it includes an elastic support member arranged between two adjacent box girders 3. The two box girders 3 are located on both sides of the bridge. The elastic support member includes an elastic member 2 and a cable 1. Among them, the elastic member 2 is a rubber block, which can be directly attached to the side of the box girder 3 by pasting. And the elastic members 2 correspond to each other on the two box girders 3. The distance between two opposite elastic members 2 is less than the distance between two adjacent box girders 3, that is, the distance between two adjacent cross beams 301. In this way, when the distance between the two box girders 3 approaches, the two elastic members 2 first come into contact and are squeezed, so as to resist the impact and avoid the hard collision of the two bridges under earthquake conditions; in addition, a cable 1 is also connected between the two box girders 3. When the two box girders 3 move away from each other, the tension of the cable 1 can avoid the two bridges deviating from each other too much, thereby reducing the yaw amplitude of the box girder 3. Therefore, by coordinating and controlling the relative displacement of the two bridges by the elastic member 2 and the cable 1, the violent collision after the two bridges deviate from each other too much can be avoided, thus avoiding severe collision.

[0047] To improve the seismic performance of the bridge, along the length direction of the box girder 3, a number of horizontally arranged cross beams 301 are sequentially arranged in the box girder 3. A pier 8 is provided at the bottom of each cross beam 301. A seismic isolation and vibration reduction bearing 4 is provided between the cross beam 301 and the pier 8. The seismic isolation and vibration reduction bearing 4 is located on the center line of the cross beam 301. The cross beams 301 on the two box girders 3 correspond to each other one by one, and an elastic member 2 is correspondingly arranged at each cross beam 301. The elastic member 2 and the seismic isolation and vibration reduction bearing 4 are located on the same axis. In this scheme, in the length direction of the box girder 3, that is, the road direction, a number of cross beams 301 are arranged. A pier 8 is arranged at each cross beam 301 position, and two seismic isolation and vibration reduction bearings 4 are arranged on the center line of the pier 8 transversely. Among them, the piers 8 on the two box girders 3 are symmetrically arranged along the road center line; when the two bridges have the same-direction and same-frequency displacement, the elastic member 2 and the cable 1 do not work, and at this time the seismic isolation and vibration reduction bearing 4 realizes the seismic isolation and vibration reduction function.

[0048] Embodiment 2:

[0049] This embodiment 2 is further limited on the basis of embodiment 1, such as Figures 2 - 4 As shown, an implementation method of a cable 111 is provided; as an implementation method of a cable 1, and to ensure that the rotation of the beam body at the support is not hindered under normal working conditions, a cable 1 is provided at each two corresponding elastic members 2, and the cable 1 is provided along the length direction of the beam 301, and the two ends of the cable 1 pass through the two elastic members 2 respectively, and respectively pass through the box beams 3 on both sides, and are connected to the anchoring device 5 on the box beam 3; the cable 1 is provided just above the center line of the seismic isolation support 4. In this solution, the elastic member 2 and the cable 1 are both provided at the center line position of the corresponding seismic isolation support 4, which can realize the rapid positioning of each component during the installation process, and ensure that the rotation of the beam body at the support is not hindered under normal working conditions; in addition, the two ends of the cable 1 pass through the box beams 3 on both sides respectively, and realize the pulling through the anchoring device 5.

[0050] As a specific structure of the anchoring device 5, the anchoring device 5 includes a pressing plate 501, the end of the cable 1 is fixed to the middle of the pressing plate 501, the circumferential end of the pressing plate 501 is connected to the box beam 3 by a plurality of bolts 502, and a second rubber block 503 is arranged between the pressing plate 501 and the side wall of the box beam 3. In this solution, the pressing plate 501 is fixed to the side wall of the box beam 3 by a plurality of bolts 502, and at this time, a gap is left between the pressing plate 501 and the box beam 3, and a second rubber block 503 is arranged in the gap, and while realizing anchor tension, the second rubber block 503 plays a certain buffering role.

[0051] In order to facilitate the rapid replacement and maintenance of the cable 1 , the anchoring device 5 further includes a pipe 504 , which is pre-buried in the box beam 3 and is used for the cable 1 to pass through.

[0052] Embodiment 3:

[0053] This embodiment 3 is further defined on the basis of embodiment 1, such as Figures 5 - 11 As shown, another embodiment of the cable 111 is provided.

[0054] A scissors cross cable member is arranged between the two box girders 3. The scissors cross cable member is formed by two sections of the cable 1 arranged in a scissors cross manner from one end to the other end of the box girder 3. Each protruding vertex in the middle of the scissors cross cable member is located at the position of the elastic member 2. In this solution, the scissors cross cable member is formed by two sections of the cable 1 crossing in sequence to form a connected multi-section cross shape. Each of its protruding vertices is connected to the cross beam 301 and is located at the position of the elastic member 2, preferably at the center line of the same plane of the seismic isolation bearing 4. In this way, the counter-tension at the box girder 3 can be realized, and the two bridges can be prevented from colliding violently after deviating from each other too much, thus avoiding violent collisions. In addition, anchoring devices 5 can also be arranged at both ends of the two sections of the cable 1, so that through the anchoring devices 5 and the longer cable 1, a buffering effect can be achieved under the action of seismic forces; a collar can also be arranged at the end of the cross beam 301, so that the protruding vertices of the scissors cross cable member are movably connected to the collar, realizing movable connection, and enabling the entire cable 1 to be tightened synchronously.

[0055] To collect seismic response data, the elastic member 2 is a first rubber block. A liquid storage bag 201, a liquid discharge pipe 202 and a collection pipe 203 are arranged inside the first rubber block. The liquid storage bag 201 is filled with liquid. The bottom of the liquid discharge pipe 202 is communicated with the inside of the liquid storage bag 201. The top of the liquid discharge pipe 202 extends out of the first rubber block and is in a U shape. The downward-bending part at the top of the liquid discharge pipe 202 faces and is directly opposite to the opening position of the collection pipe 203. In this solution, the elastic member 2 is a rubber block. A liquid storage bag 201 is arranged inside the rubber block, and the liquid storage bag 201 stores liquid. The liquid is an incompressible liquid, and its volume can basically remain unchanged under general environmental conditions. A liquid discharge pipe 202 is communicated with the upper end of the liquid storage bag 201, and the upper end of the liquid discharge pipe 202 is in a U shape. In this way, under the action of temperature, the two bridges are slightly squeezed against each other, and the liquid in the rubber is squeezed into the liquid discharge pipe 202 but will not cross the U-shaped pipe at the top. However, under the seismic condition, the squeezing force causes the liquid to cross the U-shaped pipe and thus enter the collection pipe. After the earthquake ends, the working state of the device during the earthquake can be judged according to the amount of liquid in the collection pipe, and at the same time, the seismic response data of the bridge can be collected and applied to seismic research.

[0056] To provide enough liquid to achieve the collection of seismic response data, the stay cable 1 includes a stay cable body 101. A drain hose 102 is arranged on the axis of the stay cable body 101, and a plurality of strands 103 are evenly distributed in the circumferential direction of the drain hose 102; the inside of the drain hose 102 is filled with liquid, and the end of the drain hose 102 is provided with a liquid collection device. In this solution, the stay cable 1 is specially prepared. The drain hose 102 is located on the axis of the stay cable body 101, and a plurality of strands 103 are wound around the circumferential direction of the drain hose 102 for wrapping. In this way, the initial tension is achieved through the strands 103. Under the earthquake condition, the stay cable 1 bears a large tensile force and deforms itself. The circumferential strands 103 squeeze towards the central drain hose 102, thereby discharging the liquid in the drain hose 102 into the liquid collection device. Therefore, by the amount of liquid collected, the magnitude of the tensile force received can be judged, so as to achieve the collection of seismic response data; in addition, it can also be set to detect by means of a tensile force sensor, that is, a tensile force sensor is arranged on the stay cable 1.

[0057] Since the double-deck bridge is generally relatively wide, and the gap between adjacent box girders 3 is small, the maintenance vehicle cannot perform maintenance on the middle position of the double-deck bridge. Therefore, to achieve daily maintenance and repair, manual crawling is used to enter for maintenance. An inspection platform 6 is arranged between the two box girders 3. The inspection platform 6 is made of a wire rope net, and the wire rope net is sequentially connected from one end to the other end of the box girder 3 and is parallel to the box girder 3; the stay cable 1 is used to support the inspection platform 6. That is, the stay cable 1 is located below the inspection platform 6 for support.

[0058] To facilitate the entry of maintenance personnel, inspection manholes 7 communicating with the upper space of the wire rope net are reserved at both ends of the box girder 3. A movable ladder can be set at the abutment position, and the movable ladder is used to enter the reserved inspection manhole 7, so as to enter the inspection platform 6 for maintenance.

[0059] The above specific implementation manners further elaborate on the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above is only the specific implementation manners of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A collaborative seismic isolation structure for bridges, characterized in that, Including: An elastic support member, which is arranged between two adjacent box girders (3); the two box girders (3) are respectively arranged on both sides of the bridge; The elastic support member includes a cable (1) and a plurality of elastic members (2), the plurality of elastic members (2) are evenly distributed on the opposite faces of the two box girders (3), and the elastic members (2) on the two box girders (3) correspond to each other one by one; The cable (1) is connected between the two box girders (3).

2. The collaborative seismic isolation structure for a bridge according to claim 1, wherein, Along the length direction of the box girder (3), a plurality of transversely arranged cross beams (301) are sequentially arranged in the box girder (3), a pier (8) is provided at the bottom of each cross beam (301), and a seismic isolation and vibration reduction bearing (4) is provided between the cross beam (301) and the pier (8). The plane of the seismic isolation and vibration reduction bearing (4) is located on the center line of the cross beam (301). The cross beams (301) on the two box girders (3) correspond to each other one by one, and an elastic member (2) is correspondingly arranged at each cross beam (301). The elastic member (2) and the plane of the seismic isolation and vibration reduction bearing (4) are located on the same axis.

3. The collaborative seismic isolation structure for a bridge according to claim 2, characterized in that, A cable (1) is arranged at each of two corresponding elastic members (2), the cable (1) is arranged along the length direction of the cross beam (301), the two ends of the cable (1) respectively pass through the two elastic members (2), penetrate through the box girders (3) on both sides respectively, and are connected to the anchoring device (5) on the box girder (3); the cable (1) is arranged directly above the center line of the seismic isolation and vibration reduction bearing (4).

4. The collaborative seismic isolation structure for a bridge according to claim 3, characterized in that, The anchoring device (5) includes a pressing plate (501), the end of the cable (1) is fixed to the middle of the pressing plate (501), the circumferential end of the pressing plate (501) is connected to the box girder (3) through a plurality of bolts (502), and a second rubber block (503) is arranged between the pressing plate (501) and the side wall of the box girder (3).

5. The collaborative seismic isolation structure for a bridge according to claim 4, characterized in that, The anchoring device (5) further includes a pipe (504), and the pipe (504) is embedded in the box girder (3) and is used for the cable (1) to pass through.

6. A collaborative seismic isolation structure for a bridge according to claim 1, characterized in that, A scissors cross cable member is arranged between the two box girders (3), and the scissors cross cable member is formed by arranging two sections of the cable (1) in a scissors cross manner from one end to the other end of the box girder (3). Each protruding vertex in the middle of the scissors cross cable member is located at the position of the elastic member (2).

7. The collaborative seismic isolation structure for a bridge according to claim 6, characterized in that, The elastic member (2) adopts a first rubber block, and a liquid storage bag (201), a liquid discharge pipe (202) and a collection pipe (203) are arranged inside the first rubber block. The liquid storage bag (201) is filled with liquid. The bottom of the liquid discharge pipe (202) is communicated with the inside of the liquid storage bag (201). The top of the liquid discharge pipe (202) extends out of the first rubber block and is in a U shape. The downward bent part of the top of the liquid discharge pipe (202) faces and is directly opposite to the opening position of the collection pipe (203).

8. The collaborative seismic isolation structure for a bridge according to claim 7, characterized in that, The cable (1) includes a cable body (101), a drain hose (102) is arranged on the axis of the cable body (101), and a plurality of wire strands (103) are evenly distributed in the circumferential direction of the drain hose (102); the inside of the drain hose (102) is filled with liquid, and the end of the drain hose (102) is provided with a liquid collection device.

9. The collaborative seismic isolation structure for a bridge according to claim 1, wherein, A maintenance platform (6) is arranged between the two box girders (3). The maintenance platform (6) is made of a wire rope net, and the wire rope net is sequentially connected from one end to the other end of the box girder (3) and is parallel to the box girder (3); the cable (1) is used to support the maintenance platform (6).

10. The collaborative seismic isolation structure for a bridge according to claim 9, characterized in that, Maintenance manholes (7) communicating with the upper space of the wire rope net are also reserved at both ends of the box girder (3).

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