A bridge with anti-fall and seismic isolation coordination and its construction method and inspection and maintenance method

Abstract

The present invention discloses a bridge with coordinated fall prevention and seismic isolation and its construction method and inspection and maintenance method, which relates to the field of bridge seismic technology, including bridge piers, supports, box beams and a composite seismic isolation and fall prevention device, the composite seismic isolation and fall prevention device is arranged between the bridge piers and the box beam body, the composite seismic isolation and fall prevention device includes a limit energy dissipation component, a first lateral flexible connector, a second lateral flexible connector, a top limit shock absorption and hollowing component and a top flexible connector, the first end of the limit energy dissipation component is fixed on the bridge pier, and the second end of the limit energy dissipation component extends into the accommodating connection positioning groove. The bridge with coordinated fall prevention and seismic isolation of the present invention can not only be limited in the longitudinal, transverse and vertical directions, but also dissipate energy in the longitudinal, transverse and vertical directions by integrating and arranging the limit energy dissipation component, the first lateral flexible connector, the second lateral flexible connector, the top limit shock absorption and hollowing component and the top flexible connector.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge earthquake resistance, and in particular to a bridge with coordinated fall prevention and seismic reduction and isolation, and a construction method and an inspection and maintenance method thereof. Background Art

[0002] As a key node of transportation infrastructure, the seismic performance of bridges is directly related to traffic safety. Under strong earthquakes, bridges may suffer serious damage such as falling beams and collapse, leading to structural failure and significant losses.

[0003] At present, the earthquake resistance of bridge structures mainly relies on measures such as shock absorbing devices, seismic isolation devices and anti-drop beam devices. Shock absorbing devices consume seismic energy by increasing damping, seismic isolation devices extend the structural period to reduce seismic effects, and anti-drop beam devices mainly limit the bridge superstructure from excessive displacement or separation from the support under strong earthquakes. In the prior art, anti-drop beam devices and seismic isolation devices are usually designed and installed separately. Although this approach improves the seismic performance of bridges to a certain extent, it also has many problems: first, the independent installation of multiple devices increases the complexity and cost of construction; second, the lack of a collaborative working mechanism between the devices may lead to poor earthquake resistance; third, the maintenance and replacement of multiple independent systems become more difficult and expensive. In addition, traditional anti-drop beam devices often only consider limiting displacement, but ignore the role of seismic isolation, and may fail due to excessive impact force under strong earthquakes.

[0004] In view of the limitations of the prior art, it is necessary to propose an integrated device that organically combines the anti-falling beam and seismic isolation functions and a corresponding bridge structure to solve or at least alleviate the above-mentioned defects. Summary of the invention

[0005] The main purpose of the present invention is to provide a bridge with coordinated fall prevention and seismic isolation, and its construction method and inspection and maintenance method, aiming to solve the technical problems that the shock absorbing device, seismic isolation device and anti-fall beam device of the existing bridge structure are arranged independently, each device has a single function and poor coordination.

[0006] To achieve the above-mentioned purpose, the present invention provides a bridge with coordinated fall prevention and seismic isolation, including piers, supports, a box beam body and a composite seismic isolation and fall prevention device. The box beam body is supported on the piers by the supports. The composite seismic isolation and fall prevention device is arranged between the piers and the box beam body. The composite seismic isolation and fall prevention device is arranged in a one-to-one correspondence with the box beam body and is located at the end of the box beam body. A accommodating connection positioning groove which vertically penetrates the bottom beam plate of the box beam body is arranged at the bottom of the box beam body. The accommodating connection positioning groove is connected with the box beam cavity of the box beam body. The composite seismic isolation and fall prevention device includes a limiting energy dissipation component, a first lateral flexible connector, a second lateral flexible connector, a top limiting shock-absorbing de-airing component and a top flexible connector. The first end of the limiting energy dissipation component It is fixed on the pier, and the second end of the limiting energy absorbing component extends into the accommodating connection positioning groove. The first lateral flexible connecting piece is arranged between the lateral side wall surface of the limiting energy absorbing component and the lateral groove wall surface of the accommodating connection positioning groove. The second lateral flexible connecting piece is arranged between the longitudinal side wall surface of the limiting energy absorbing component and the longitudinal groove wall surface of the accommodating connection positioning groove. The top limiting shock absorbing and hollowing component is in the box beam cavity. The bottom of the top limiting shock absorbing and hollowing component extends downward and extends into the accommodating connection positioning groove and is fixedly connected with the limiting energy absorbing component. The two ends of the top limiting shock absorbing and hollowing component extend laterally to the outside of the accommodating connection positioning groove. The top flexible connecting piece is arranged between the lateral extension end of the top limiting shock absorbing and hollowing component and the bottom beam plate.

[0007] Furthermore, the limiting energy dissipation component is detachably arranged on the bridge pier, and / or the accommodating connection positioning groove is a lateral opening groove with one side open.

[0008] Furthermore, the limiting energy absorbing component is arranged in the middle part of the pier, and the support is arranged on the outside of the limiting energy absorbing component. The limiting energy absorbing component includes a rigid limiting box and a honeycomb energy absorbing mechanism. The honeycomb energy absorbing mechanism is accommodated in the rigid limiting box. The honeycomb energy absorbing mechanism includes interconnected composite energy absorbing units and foam filling material units filling the composite energy absorbing units. The first lateral flexible connector, the second lateral flexible connector, and the top limiting shock absorbing and de-airing component are respectively connected to the rigid limiting box.

[0009] Furthermore, a pier top embedded connector is embedded in the top of the pier, the rigid limit box is a rectangular box, the rigid limit box includes a box bottom plate, four side plates, a box top plate and box stiffening ribs, the bottoms of the four side plates are fixedly connected to the box bottom plate through stiffening ribs, a box top plate is arranged on the top of the four side plates, the honeycomb energy dissipation mechanism is accommodated in a space enclosed by the box bottom plate, the four side plates and the box top plate, and the box bottom plate is fixedly connected to the pier top embedded connector.

[0010] Furthermore, the top limit shock-absorbing and de-airing assembly includes a distribution beam, a connecting base and a connecting vertical plate. The connecting base is fixed on the rigid limit box body, the first end of the connecting vertical plate is fixed on the connecting base, the second end of the connecting vertical plate extends upward and extends into the box beam cavity, the distribution beam is arranged on the second end of the connecting vertical plate and a vertical gap is left between the end of the distribution beam and the bottom beam plate, and top flexible connectors are respectively provided at both ends of the distribution beam, and the top flexible connector is arranged between the bottom beam plate and the distribution beam.

[0011] Furthermore, a first embedded connecting member is embedded in the bottom beam plate, and the top flexible connecting member includes a vertical spring and a top connecting steel plate. The top connecting steel plate is fixed on the surface of the bottom beam plate through the first embedded connecting member. The vertical spring is arranged in the vertical gap and elastically supported between the distribution beam and the top connecting steel plate.

[0012] Furthermore, a second embedded connecting member is embedded in the transverse groove wall of the accommodating connection positioning groove, the first lateral flexible connecting member includes a first connecting steel plate, a first transverse spring and a second connecting steel plate, the first connecting steel plate is arranged on the transverse side wall of the rigid limiting box body, the second connecting steel plate is fixedly arranged on the transverse groove wall of the accommodating connection positioning groove through the second embedded connecting member, the first transverse spring elastically abuts between the first connecting steel plate and the second connecting steel plate, and / or a third embedded connecting member is embedded in the longitudinal groove wall of the accommodating connection positioning groove, the second lateral flexible connecting member includes a third connecting steel plate, a second transverse spring and a fourth connecting steel plate, the third connecting steel plate is arranged on the longitudinal side wall of the rigid limiting box body, the fourth connecting steel plate is fixedly arranged on the longitudinal groove wall of the accommodating connection positioning groove through the third embedded connecting member, and the second transverse spring elastically abuts between the third connecting steel plate and the fourth connecting steel plate.

[0013] Furthermore, two box beam bodies are arranged on the bridge piers along the longitudinal direction, and the seismic isolation and fall prevention composite devices are arranged one by one with the box beam bodies. The two seismic isolation and fall prevention composite devices are arranged on the bridge piers at intervals along the longitudinal direction, and the rigid limiting box bodies of the seismic isolation and fall prevention composite devices are fixedly connected by an intermediate connecting mechanism.

[0014] Furthermore, an outer end surface of the bottom of the box beam body is recessed to form an inspection notch.

[0015] The present invention also provides a construction method for a bridge with coordinated fall prevention and seismic isolation, which is used to construct the above-mentioned bridge with coordinated fall prevention and seismic isolation. The bridge with coordinated fall prevention and seismic isolation includes bridge piers, bearings and a box beam body. The box beam body is supported on the bridge piers by the bearings. The top surface of the bridge pier is pre-embedded with a pier top pre-embedded connector. The box beam body has a box beam cavity and a receiving connection positioning groove connected to the box beam cavity. The bottom beam plate of the box beam body is pre-embedded with a first pre-embedded connector, a second pre-embedded connector and a third pre-embedded connector.

[0016] Includes steps:

[0017] Modular installation of limited energy dissipation components; specifically including:

[0018] The box bottom plate of the position-limiting energy-absorbing component is fixed on the top surface of the pier through the pre-embedded connector on the top of the pier;

[0019] The composite energy dissipation unit and four side panels are installed on the bottom plate of the box. The bottom of the four side panels is fixedly connected to the bottom plate of the box through stiffening ribs. The top plate of the box is sealed after the foam material is filled to form a foam filling material unit.

[0020] The first lateral flexible connector, the second lateral flexible connector, and the top limit shock-absorbing and de-airing assembly are modularly installed; specifically including:

[0021] The first connecting steel plate is arranged on the lateral side wall surface of the rigid limit box; the second connecting steel plate is fixedly arranged on the lateral groove wall surface of the accommodating connection positioning groove by a second embedded connecting piece; the first lateral spring is elastically loaded between the first connecting steel plate and the second connecting steel plate;

[0022] The third connecting steel plate is arranged on the longitudinal side wall of the rigid limit box; the fourth connecting steel plate is fixedly arranged on the longitudinal groove wall of the accommodating connection positioning groove by the third embedded connecting piece; the second transverse spring is elastically loaded between the third connecting steel plate and the fourth connecting steel plate;

[0023] By fixing one end of the connecting vertical plate on the rigid limit box body and supporting the distribution beam at the other end of the connecting vertical plate, the distribution beam is assembled in the box beam cavity. The first embedded connecting part fixes the top connecting steel plate on the surface of the bottom beam plate and elastically loads the vertical spring between the distribution beam and the top connecting steel plate.

[0024] The present invention also provides a method for inspecting and maintaining a bridge with anti-fall and seismic isolation coordination, wherein the bottom plate of the rigid limit box is detachably connected to the pre-embedded connector on the pier top, the top limit shock-absorbing hollowing assembly is detachably connected to the rigid limit box, the first connecting steel plate is detachably connected to the rigid limit box, and the third connecting steel plate is detachably connected to the rigid limit box;

[0025] The top connecting steel plate is detachably connected to the first embedded connecting piece, the second connecting steel plate is detachably connected to the second embedded connecting piece, and the fourth connecting steel plate is detachably connected to the third embedded connecting piece;

[0026] Includes steps:

[0027] The first transverse spring, the first connecting steel plate and the second connecting steel plate are removed to complete the removal of the first lateral flexible connecting member;

[0028] The second transverse spring, the third connecting steel plate and the fourth connecting steel plate are removed to complete the removal of the second lateral flexible connecting member;

[0029] Remove the top limit shock-absorbing and air-release assembly, vertical spring and top connecting steel plate;

[0030] Dismantle the limited energy dissipation components and the embedded connectors on the pier top;

[0031] Reassemble using the above construction method.

[0032] Compared with the prior art, the anti-fall and seismic isolation bridge provided by the present invention has the following beneficial effects:

[0033] The anti-fall-seismic isolation coordinated bridge provided by the present invention comprises a pier, a support, a box beam body and a seismic isolation and anti-fall composite device. The seismic isolation and anti-fall composite device is arranged in a one-to-one correspondence with the box beam body. The seismic isolation and anti-fall composite device is arranged between the pier and the box beam body for shock absorption and seismic isolation and preventing the box beam body from falling off the pier. The seismic isolation and anti-fall composite device comprises a limiting energy-absorbing component, a first lateral flexible connector, a second lateral flexible connector, a top limiting shock-absorbing emptying component and a top flexible connector. The limiting energy-absorbing component is fixedly arranged on the pier, the first end of the limiting energy-absorbing component is fixedly arranged on the pier, the second end of the limiting energy-absorbing component extends into the accommodating connection positioning groove, the first lateral flexible connector is arranged between the lateral side wall surface of the limiting energy-absorbing component and the lateral groove wall surface of the accommodating connection positioning groove, and the second lateral flexible connector is arranged on the longitudinal side wall of the limiting energy-absorbing component. The top flexible connector is arranged between the lateral extension end of the top limit shock-absorbing and de-escaping component and the bottom beam plate, and the limit energy-absorbing component extends into the accommodating connection positioning groove and is flexibly connected to the box beam body, so as to prevent the box beam from falling and reduce vibration in the longitudinal, transverse and vertical directions. The flexible connection can adapt to the deformation requirements of the bridge structure in all directions. At this time, the limit energy-absorbing component does not play an energy-absorbing role; under extreme conditions such as strong earthquakes, the limit energy-absorbing component is used to perform multi-directional limiting and shock-absorbing energy dissipation to ensure all-round protection of the structural safety; the scheme of the present invention integrates the arrangement of the limit energy-absorbing component, the first lateral flexible connector, the second lateral flexible connector, the top limit shock-absorbing and de-escaping component and the top flexible connector, which can not only limit the three directions of longitudinal, transverse and vertical, but also dissipate energy in the longitudinal, transverse and vertical directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0035] Figure 1This is one of the three-dimensional structural schematic diagrams of a bridge with coordinated fall prevention and seismic isolation in one embodiment of the present invention;

[0036] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0037] Figure 3 for Figure 1 Front view of the bridge with coordinated fall protection and seismic isolation;

[0038] Figure 4 for Figure 1 Schematic diagram of the three-dimensional structure of the middle vibration reduction and isolation fall prevention composite device;

[0039] Figure 5 for Figure 4 Rear view of the middle vibration reduction and isolation fall protection composite device;

[0040] Figure 6 for Figure 5 Sectional view at the middle BB;

[0041] Figure 7 A side view of a bridge with coordinated fall prevention and seismic isolation in another embodiment of the present invention;

[0042] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0043] Fig. 9 for Figure 7 One of the partial three-dimensional structural diagrams of the bridge with coordinated fall protection and seismic isolation;

[0044] Fig.10 for Figure 7 The second schematic diagram of the partial three-dimensional structure of the bridge with coordinated fall protection and seismic isolation;

[0045] Fig.11 It is a schematic diagram of the three-dimensional structure of a composite energy consumption unit in one embodiment of the present invention;

[0046] Fig.12 is a schematic diagram of the three-dimensional structure of a composite energy consumption unit in another embodiment of the present invention;

[0047] Fig.13 It is a schematic diagram of the three-dimensional structure of a composite energy consumption unit in another embodiment of the present invention.

[0048] Legend:

[0049] 100. Bridge with coordinated fall prevention and seismic isolation; 10. Bridge piers; 20. Supports; 30. Box beam body; 31. Bottom beam plate; 32. Accommodating connection positioning grooves; 33. Box beam cavity; 34. Maintenance notches; 40. Composite seismic isolation and fall prevention device; 41. Position limiting energy-absorbing component; 411. Rigid position limiting box body; 4111. Box bottom plate; 4112. Four side plates; 4113. Box top plate; 4114. Box stiffening ribs; 412. Honeycomb energy-absorbing mechanism; 4121. Composite energy-absorbing unit; 4122. Foam filling unit; 42. First lateral flexible connector; 43. Second lateral flexible connector; 44. Top position limiting shock-absorbing and de-escalating component; 45. Top flexible connector; 50. Intermediate connecting mechanism.

[0050] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0051] 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.

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0054] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0055] Please refer to the attached Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 The present invention provides a bridge 100 with anti-fall and seismic isolation coordination, comprising a pier 10, a support 20, a box beam body 30 and a seismic isolation and anti-fall composite device 40. The box beam body 30 is supported on the pier 10 by the support 20. The seismic isolation and anti-fall composite device 40 is arranged between the pier 10 and the box beam body 30. The seismic isolation and anti-fall composite device 40 is arranged in a one-to-one correspondence with the box beam body 30 and is located at the end of the box beam body 30. The bottom of the box beam body 30 is provided with a accommodating connection positioning groove 32 of a bottom beam plate 31 that vertically penetrates the box beam body 30. The accommodating connection positioning groove 32 is connected to a box beam cavity 33 of the box beam body 30. The seismic isolation and anti-fall composite device 40 comprises a limiting energy dissipation component 41, a first lateral flexible connector 42, a second lateral flexible connector 43, a top limiting shock-absorbing de-airing component 44 and a top flexible connector 45. The limiting The first end of the energy absorbing component 41 is fixed on the pier 10, the second end of the limiting energy absorbing component 41 extends into the accommodating connection positioning groove 32, the first lateral flexible connector 42 is arranged between the lateral side wall surface of the limiting energy absorbing component 41 and the lateral groove wall surface of the accommodating connection positioning groove 32, the second lateral flexible connector 43 is arranged between the longitudinal side wall surface of the limiting energy absorbing component 41 and the longitudinal groove wall surface of the accommodating connection positioning groove 32, the top limiting shock absorbing and hollowing component is in the box beam cavity 33, the bottom of the top limiting shock absorbing and hollowing component extends downward and extends into the accommodating connection positioning groove 32 and is fixedly connected with the limiting energy absorbing component 41, the two ends of the top limiting shock absorbing and hollowing component extend laterally to the outside of the accommodating connection positioning groove 32, and the top flexible connector 45 is arranged between the lateral extension end of the top limiting shock absorbing and hollowing component and the bottom beam plate 31.

[0056] The anti-fall-isolation-coordinated bridge 100 provided by the present invention comprises a pier 10, a support 20, a box beam body 30 and a shock-isolating and anti-fall composite device 40. The shock-isolating and anti-fall composite device 40 is arranged one-to-one with the box beam body 30. The shock-isolating and anti-fall composite device 40 is arranged between the pier 10 and the box beam body 30 for shock absorption and isolation and preventing the box beam body 30 from falling off from the pier 10. The shock-isolating and anti-fall composite device 40 comprises a limiting energy dissipation component 41, a first lateral flexible connector 42 and a second lateral flexible connector 44. 2. The second lateral flexible connector 43, the top limit shock-absorbing and de-airing component 44 and the top flexible connector 45, the limit energy-absorbing component 41 is fixedly arranged on the pier 10, the first end of the limit energy-absorbing component 41 is fixedly arranged on the pier 10, the second end of the limit energy-absorbing component 41 extends into the accommodating connection positioning groove 32, the first lateral flexible connector 42 is arranged between the lateral side wall surface of the limit energy-absorbing component 41 and the lateral groove wall surface of the accommodating connection positioning groove 32, the second lateral flexible connector 43 The top flexible connector 45 is arranged between the longitudinal side wall of the limiting energy-absorbing component 41 and the longitudinal groove wall of the accommodating connection positioning groove 32, and is arranged between the transverse extension end of the top limiting shock-absorbing and de-escaping component and the bottom beam plate 31. The limiting energy-absorbing component 41 extends into the accommodating connection positioning groove 32 and is flexibly connected to the box beam body 30, so that the box beam body 30 can be prevented from falling and shock-absorbing and isolating in the longitudinal, transverse and vertical directions. The flexible connection can adapt to the deformation requirements of the bridge structure in all directions. At this time, the limiting energy-absorbing component 41 does not play an energy-absorbing role; under extreme conditions such as strong earthquakes, the limiting energy-absorbing component 41 is used to perform multi-directional limiting and shock-absorbing and energy-dissipating to ensure all-round protection of structural safety; the scheme of the present invention integrates the arrangement of the limiting energy-absorbing component 41, the first lateral flexible connector 42, the second lateral flexible connector 43, the top limiting shock-absorbing and de-escaping component 44 and the top flexible connector 45, which can not only limit the three directions in the longitudinal, transverse and vertical directions, but also dissipate energy in the longitudinal, transverse and vertical directions.

[0057] It can be understood that in the present invention, the box girder body 30 is a prefabricated box girder or a cast-in-place box girder; the seismic isolation and fall prevention composite device 40 is arranged one-to-one with the box girder body 30. If two box girder bodies 30 spliced ​​to each other in the longitudinal direction are arranged on the pier 10, a seismic isolation and fall prevention composite device 40 is arranged between each box girder body 30 and the pier 10; if only one box girder body 30 is arranged on the pier 10 at the end, a corresponding seismic isolation and fall prevention composite device 40 is arranged between the box girder body 30 and the pier 10.

[0058] It can be understood that the flexible connection in the present invention refers to a connection through a structure such as an elastic element or a rubber plastic element, which can adapt to smaller deformations and transmit forces when larger deformations occur.

[0059] Please refer again Figure 2It can be understood that in the scheme of the present invention, the first lateral flexible connector 42, the second lateral flexible connector 43, the top limiting shock-absorbing and de-airing component 44 and the top flexible connector 45 are integrated and arranged based on the limiting energy-absorbing component 41, so that the anti-falling beam device not only has the function of limiting displacement, but also has the function of shock reduction and isolation, thereby avoiding the effect of failure due to excessive impact force under strong earthquakes.

[0060] Furthermore, the position-limiting energy-dissipating assembly 41 is detachably disposed on the pier 10 .

[0061] Further, the accommodating connection positioning groove 32 is a lateral opening groove with one side open. It can be understood that the accommodating connection positioning groove 32 can be a groove structure with four sides closed, or a lateral opening groove structure with one side open. In the present invention, in order to facilitate construction and later replacement and maintenance, the end of the box beam body 30 has an opening so that the accommodating connection positioning groove 32 is a lateral opening groove with one side open.

[0062] Please refer again Figure 4 , Figure 5 , Figure 6 , Fig.11 , Fig.12 as well as Fig.13 Furthermore, the position-limiting energy-absorbing component 41 is arranged in the middle of the pier 10, and the support 20 is arranged on the outside of the position-limiting energy-absorbing component 41. The position-limiting energy-absorbing component 41 includes a rigid position-limiting box 411 and a honeycomb energy-absorbing mechanism 412. The honeycomb energy-absorbing mechanism 412 is contained in the rigid position-limiting box 411. The honeycomb energy-absorbing mechanism 412 includes interconnected composite energy-absorbing units 4121 and foam filling material units 4122 filling the composite energy-absorbing units 4121. The first lateral flexible connector 42, the second lateral flexible connector 43, and the top position-limiting shock-absorbing and de-airing component 44 are respectively connected to the rigid position-limiting box 411. In this embodiment, a plurality of composite energy-absorbing units 4121 are interconnected and combined to form an internal core energy-absorbing component under the synergistic effect of the foam filling material unit 4122. In specific implementation, the longitudinal and lateral stiffness of the internal core energy-absorbing component can be flexibly adjusted by adjusting the structure of the composite energy-absorbing unit 4121 and the number of longitudinal and lateral arrangements to meet different seismic demand scenarios.

[0063] Please refer to Fig.11 In a specific embodiment, the composite energy dissipation unit 4121 adopts a multi-circular composite energy dissipation unit structure, and the core skeleton of the multi-circular composite energy dissipation unit structure is formed by welding and enclosing a middle core circular tube, an outer ring circular tube arranged in a regular hexagon, and a radial connecting steel plate and a peripheral connecting steel plate. The enclosed space is filled with foam filling material to form a foam filling material unit 4122, so that the limited energy dissipation component 41 is a dense structure of skeleton-foam filling material, which jointly bears the seismic load transmitted by the bridge superstructure; please refer to Fig.12 In another specific embodiment, the composite energy consuming unit 4121 adopts a single circular composite energy consuming unit structure, and the core skeleton of the single circular composite energy consuming unit structure is formed by welding and enclosing a middle core circular tube, a peripheral connecting steel plate arranged in a regular hexagon, and a radial connecting steel plate, and the enclosed space is filled with foam filling material to form a foam filling material unit 4122; please refer to Fig.13 In another specific embodiment, the composite energy absorbing unit 4121 adopts a non-circular composite energy absorbing unit structure, and the core skeleton of the non-circular composite energy absorbing unit structure is formed by welding and enclosing the peripheral connecting steel plates arranged in a regular hexagon and the middle radial connecting steel plates, and the enclosed space is filled with foam filler to form a foam filler unit 4122. In the present invention, for scenes with different seismic requirements, the composite energy absorbing unit structure form and parameters are adjustable (that is, variable stiffness can be achieved to meet different force requirements). In specific implementation, the stiffness of the multi-circular composite energy absorbing unit structure can also be designed and adjusted, and the seismic requirements of different earthquake intensity zones and different forms of bridge structures can be met by adjusting the number of components of the circular steel pipe, the diameter d of the steel pipe, the wall thickness t1 of the circular steel pipe, the length l of the connecting steel plate, the plate thickness t2 of the connecting steel plate and the overall height h of the composite energy absorbing unit 4121.

[0064] It can be understood that the single-circle composite energy absorbing unit structure or the non-circle composite energy absorbing unit structure, both of which have peripheral connecting steel plates, can replace any energy absorbing unit at will. When the earthquake intensity is small, a regular hexagonal energy absorbing unit with a full steel plate, that is, a non-circle composite energy absorbing unit structure, can be used; when the earthquake intensity is medium, a regular hexagonal energy absorbing unit with a core circle, that is, a single-circle composite energy absorbing unit structure, can be used; when the earthquake intensity is high, a multi-circle composite energy absorbing unit can be used.

[0065] Furthermore, the top of the pier 10 is pre-embedded with a pier top embedded connector, the rigid limiting box 411 is a rectangular box, the rigid limiting box 411 includes a box bottom plate 4111, four side plates 4112, a box top plate 4113 and a box stiffening rib 4114, the bottom of the four side plates 4112 is fixedly connected to the box bottom plate 4111 through the stiffening ribs, the top plate 4113 is arranged on the top of the four side plates 4112, the honeycomb energy dissipation mechanism 412 is accommodated in the space enclosed by the box bottom plate 4111, the four side plates 4112 and the box top plate 4113, and the box bottom plate 4111 is fixedly connected to the pier top embedded connector.

[0066] It can be understood that the pier top embedded connection piece can be an embedded fastening bolt, or other embedded components such as an embedded steel plate.

[0067] In the specific implementation, bolt holes are opened on the four side panels 4112 and the top panel 4113 of the box. The bolt holes on the four side panels 4112 are respectively used for connecting the intermediate connecting mechanism 50, the first lateral flexible connecting member 42, the second lateral flexible connecting member 43 with the rigid limit box body 411, and the bolt holes opened on the top panel 4113 are used for connecting the top limit shock absorbing and de-airing assembly 44 with the rigid limit box body 411.

[0068] Furthermore, the top limit shock-absorbing de-airing assembly 44 includes a distribution beam, a connecting base and a connecting vertical plate. The connecting base is fixed on the rigid limit box body 411, the first end of the connecting vertical plate is fixed on the connecting base, the second end of the connecting vertical plate extends upward and extends into the box beam cavity 33, the distribution beam is arranged on the second end of the connecting vertical plate and a vertical gap is left between the end of the distribution beam and the bottom beam plate 31, and top flexible connectors 45 are respectively provided at both ends of the distribution beam, and the top flexible connector 45 is arranged between the bottom beam plate 31 and the distribution beam.

[0069] Furthermore, a first embedded connector is embedded in the bottom beam plate 31, and the top flexible connector 45 includes a vertical spring and a top connecting steel plate. The top connecting steel plate is fixed on the surface of the bottom beam plate 31 through the first embedded connector. The vertical spring is arranged in the vertical gap and elastically supported between the distribution beam and the top connecting steel plate.

[0070] In the specific implementation, the connecting vertical plate is fixedly connected between the connecting base and the distribution beam, and the connecting base is provided with bolt holes corresponding to the box top plate 4113, which is convenient for the modular installation and disassembly of the top limit shock-absorbing and de-emptying device. The vertical connecting plate is composed of longitudinal and transverse beam steel plates cross-welded and used to transfer vertical loads. The height of the vertical connecting plate can be flexibly adjusted as needed. The distribution beam is symmetrically arranged relative to the middle section of the rigid limit box 411, and the vertical projection length of the distribution beam has a certain overlap area with the bridge superstructure beam body, that is, the two ends of the distribution beam extend to the outside of the accommodating connection positioning groove 32. The vertical spring is arranged in the vertical gap and elastically supported between the distribution beam and the top connection steel plate. The top of the vertical spring is welded on the distribution beam and is weakly connected to the bridge superstructure beam body. Under normal use conditions, the top limit shock-absorbing and de-emptying device can adapt to the vertical deformation requirements of the bridge structure through the vertical spring and the distribution beam. In extreme cases, it can prevent the support 20 from being de-emptied and can play a role in vertical shock absorption.

[0071] Further, a second embedded connector is embedded in the transverse groove wall of the accommodating connection positioning groove 32, the first lateral flexible connector 42 includes a first connecting steel plate, a first transverse spring and a second connecting steel plate, the first connecting steel plate is arranged on the transverse side wall of the rigid limiting box 411, the second connecting steel plate is fixedly arranged on the transverse groove wall of the accommodating connection positioning groove 32 through the second embedded connector, and the first transverse spring elastically abuts between the first connecting steel plate and the second connecting steel plate. Further, a third embedded connector is embedded in the longitudinal groove wall of the accommodating connection positioning groove 32, the second lateral flexible connector 43 includes a third connecting steel plate, a second transverse spring and a fourth connecting steel plate, the third connecting steel plate is arranged on the longitudinal side wall of the rigid limiting box 411, the fourth connecting steel plate is fixedly arranged on the longitudinal groove wall of the accommodating connection positioning groove 32 through the third embedded connector, and the second transverse spring elastically abuts between the third connecting steel plate and the fourth connecting steel plate. It can be understood that in the solution of the present invention, the connection steel plate provided on the rigid limit box body is connected to the box body by countersunk bolts, which is convenient for modular installation and later maintenance and replacement.

[0072] Furthermore, the outer end surface of the bottom of the box beam body 30 is recessed to form an inspection notch 34. It can be understood that when the two box beam bodies 30 are arranged on the bridge pier 10 in the longitudinal direction, the outer end surface of the bottom of the box beam body 30 is recessed to form an inspection notch 34 to form a concave gap that is small at the top and large at the bottom, and an assembly space is reserved. Finally, the assembly, inspection and replacement of the seismic isolation and fall prevention composite device 40 can be achieved in the concave gap.

[0073] In specific implementation, the limiting energy absorbing component 41 is weakly connected with the bottom beam plate 31 on the upper part of the bridge in the transverse direction through the first lateral flexible connector 42, the limiting energy absorbing component 41 is weakly connected with the bottom beam plate 31 on the upper part of the bridge in the longitudinal direction through the second lateral flexible connector 43, and the limiting energy absorbing component 41 is weakly connected with the bottom beam plate 31 in the vertical direction through the top limiting shock-absorbing and de-airing component 44 and the top flexible connector 45, and weak connections are simultaneously achieved in the longitudinal, transverse and vertical directions; a single limiting energy absorbing component 41 is flexibly connected to the three connecting structures and is detachably connected, which is convenient for the modular installation and disassembly of the connecting structure, and can adapt to the different deformation requirements of the longitudinal and transverse directions of the bridge structure under normal use.

[0074] During the specific implementation, in order to reserve space for installation and replacement, a concave gap is designed, the end transverse partition of the bridge superstructure is eliminated, the thickness of the top plate, web and bottom plate of the bridge superstructure beam end is thickened, and the center line of the beam end web is arranged to coincide with the center line of the support 20 as much as possible to ensure that the vertical load is transmitted through the beam end web.

[0075] Please refer to Figure 7 , Figure 8 , Fig. 9 and Fig.10Furthermore, two box beam bodies 30 are arranged on the bridge pier 10 in the longitudinal direction, and the shock-absorbing and anti-falling composite devices 40 are arranged one by one with the box beam bodies 30. The two shock-absorbing and anti-falling composite devices 40 are arranged on the bridge pier 10 at intervals in the longitudinal direction, and the rigid limit box bodies 411 of the shock-absorbing and anti-falling composite devices 40 are fixedly connected through the intermediate connection mechanism 50. Specifically, the two rigid limit box bodies 411 are rigidly connected through the intermediate connection mechanism 50 to coordinate force deformation. The intermediate connection mechanism 50 is composed of two vertical plates arranged at intervals and longitudinal and transverse connection plates welded between the vertical plates. Bolt holes corresponding to the rigid limit box bodies 411 are opened on the vertical plates to facilitate modular installation and disassembly of the intermediate connection mechanism 50.

[0076] The present invention also provides a construction method of a bridge 100 with anti-fall and seismic isolation coordination, which is used to construct the above-mentioned bridge 100 with anti-fall and seismic isolation coordination. The bridge 100 with anti-fall and seismic isolation coordination includes a pier 10, a support 20 and a box beam body 30. The box beam body 30 is supported on the pier 10 by the support 20. The top surface of the pier 10 is pre-embedded with a pier top pre-embedded connector. The box beam body 30 has a box beam cavity 33 and a receiving connection positioning groove 32 connected to the box beam cavity 33. The bottom beam plate 31 of the box beam body 30 is pre-embedded with a first pre-embedded connector, a second pre-embedded connector and a third pre-embedded connector.

[0077] Includes steps:

[0078] The modular installation limit energy dissipation component 41 specifically includes:

[0079] The box bottom plate 4111 of the position-limiting energy-absorbing component 41 is fixed to the top surface of the pier 10 through the pre-embedded connector on the pier top;

[0080] A composite energy dissipation unit 4121 and four side panels 4112 are installed on the box bottom plate 4111. The bottom of the four side panels 4112 is fixedly connected to the box bottom plate 4111 through stiffening ribs. Foam material is filled to form a foam filling material unit 4122 and then the box top plate 4113 is sealed.

[0081] The first lateral flexible connector 42, the second lateral flexible connector 43, and the top limit shock-absorbing and de-airing assembly 44 are modularly installed; specifically, they include:

[0082] The first connecting steel plate is arranged on the lateral side wall surface of the rigid limit box 411; the second connecting steel plate is fixedly arranged on the lateral groove wall surface of the accommodating connection positioning groove 32 by a second embedded connecting member; the first lateral spring is elastically loaded between the first connecting steel plate and the second connecting steel plate;

[0083] The third connecting steel plate is arranged on the longitudinal side wall surface of the rigid limit box 411; the fourth connecting steel plate is fixedly arranged on the longitudinal groove wall surface of the accommodating connection positioning groove 32 through the third embedded connecting piece; the second transverse spring is elastically loaded between the third connecting steel plate and the fourth connecting steel plate;

[0084] By fixing one end of the connecting vertical plate on the rigid limit box 411, and supporting the distribution beam at the other end of the connecting vertical plate, the distribution beam is assembled in the box beam cavity 33. The first embedded connecting piece fixes the top connecting steel plate on the surface of the bottom beam plate 31, and elastically loads the vertical spring between the distribution beam and the top connecting steel plate.

[0085] Furthermore, if there are two shock-absorbing, isolation and fall-prevention composite devices 40 , after the two position-limiting and energy-absorbing components 41 are installed respectively, they are rigidly connected through the intermediate connection mechanism 50 .

[0086] The present invention also provides a method for inspecting and maintaining a bridge 100 with coordinated fall prevention and seismic isolation;

[0087] The box bottom plate 4111 of the rigid limit box 411 is detachably connected to the pier top embedded connector, the top limit shock-absorbing and de-airing assembly 44 is detachably connected to the rigid limit box 411, the first connecting steel plate is detachably connected to the rigid limit box 411, and the third connecting steel plate is detachably connected to the rigid limit box 411;

[0088] The top connecting steel plate is detachably connected to the first embedded connecting piece, the second connecting steel plate is detachably connected to the second embedded connecting piece, and the fourth connecting steel plate is detachably connected to the third embedded connecting piece;

[0089] Includes steps:

[0090] If there is an intermediate connecting mechanism, remove it;

[0091] The first transverse spring, the first connecting steel plate and the second connecting steel plate are removed to complete the removal of the first lateral flexible connecting member 42;

[0092] The second transverse spring, the third connecting steel plate and the fourth connecting steel plate are removed to complete the removal of the second lateral flexible connecting member 43;

[0093] Remove the top limit shock-absorbing and de-airing assembly 44, the vertical spring and the top connecting steel plate;

[0094] Remove the old limit energy dissipation component from the inspection slot and install the new limit energy dissipation component;

[0095] The new limiting energy dissipation component is assembled using the above-mentioned construction method.

[0096] Furthermore, during dismantling, if there are two shock-absorbing, isolation and fall-prevention composite devices 40 , the intermediate connection mechanism 50 is dismantled before dismantling the two position-limiting and energy-absorbing components 41 .

[0097] The anti-fall and seismic isolation coordinated bridge 100 and construction method provided by the present invention have the following beneficial effects:

[0098] The integrated anti-falling beam and seismic isolation functions solve the problems of single function, poor coordination, and difficult maintenance caused by the independent installation of multiple devices in traditional technologies. The integrated design simplifies the construction process and reduces costs.

[0099] Through a single limited energy dissipation component 41, all-round protection against falling beams and seismic isolation in the longitudinal, transverse and vertical directions of the bridge structure is achieved, and a composite energy dissipation unit 4121 is provided. By adjusting the composite energy dissipation unit 4121, the structural stiffness can be flexibly adjusted singly or jointly to meet the seismic requirements of different seismic intensity zones and different bridge structure forms;

[0100] It can simultaneously meet the requirements of the normal use conditions and extreme conditions of the structure. Under normal use conditions, the longitudinal, transverse and vertical flexible connections are used to adapt to the deformation requirements of the bridge structure in all directions. At this time, the energy dissipation function of the limiting energy dissipation component 41 does not play a role. Under extreme conditions such as strong earthquakes, the rigid limiting box 411 of the limiting energy dissipation component 41 is used to perform multi-directional limiting, and the honeycomb energy dissipation mechanism 412 of the limiting energy dissipation component 41 is used to reduce shock and dissipate energy, thereby ensuring the safety of the structure.

[0101] The limiting energy dissipation component 41 is rigidly connected to the bridge pier 10, and the three-way contact between the limiting energy dissipation component 41 and other connecting components (beam body) is a weak connection (flexible connection). Compared with the traditional rigid strong connection installation, it is more conducive to the later maintenance and replacement of the device while ensuring the normal use function; at the same time, due to the existence of weak connection, the whole bridge support 20 system can adopt the form of movable support 20, avoiding the installation of expensive earthquake-resistant support 20, saving engineering cost;

[0102] The modular installation and detachable design greatly improves the installation efficiency and maintenance convenience of the device. Even if the rigid limit box 411 is damaged as a whole under the action of a rare earthquake, it can be quickly and conveniently replaced as a whole. That is, the device is easy to repair after an earthquake, has good economy, and saves the maintenance cost of the structure throughout its life cycle.

[0103] Through the design of the intermediate connection mechanism 50, the flexible connection mechanism and the top limit shock-absorbing and air-release device, effective coordination between the functional components is achieved, and the overall earthquake resistance effect is improved; at the same time, any module can be installed, disassembled and repaired, with strong adaptability to usage scenarios, which also makes the full life cycle management of the device simpler and more efficient.

[0104] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the protection scope of the present invention.

Claims

1. A bridge with coordinated fall prevention and seismic isolation, characterized in that: It comprises a bridge pier, a support, a box beam body and a composite seismic isolation and fall prevention device, wherein the box beam body is supported on the bridge pier through the support, the composite seismic isolation and fall prevention device is arranged between the bridge pier and the box beam body, the composite seismic isolation and fall prevention device is arranged one-to-one with the box beam body and is located at the end of the box beam body, and a receiving connection positioning groove which vertically penetrates the bottom beam plate of the box beam body is arranged at the bottom of the box beam body, and the receiving connection positioning groove is communicated with the box beam cavity of the box beam body; The shock-absorbing, isolation and fall-proof composite device comprises a position-limiting and energy-absorbing component, a first lateral flexible connector, a second lateral flexible connector, a top position-limiting, shock-absorbing and hollowing component and a top flexible connector. The first end of the position-limiting and energy-absorbing component is fixedly arranged on the pier, and the second end of the position-limiting and energy-absorbing component extends into the accommodating and connecting positioning groove. The first lateral flexible connector is arranged between the transverse side wall surface of the position-limiting and energy-absorbing component and the transverse groove wall surface of the accommodating and connecting positioning groove. The second lateral flexible connector is arranged between the longitudinal side wall surface of the position-limiting and energy-absorbing component and the longitudinal groove wall surface of the accommodating and connecting positioning groove. The top position-limiting, shock-absorbing and hollowing component is located in the box beam cavity. The bottom of the top position-limiting, shock-absorbing and hollowing component extends downward and extends into the accommodating and connecting positioning groove to be fixedly connected with the position-limiting and energy-absorbing component. The two ends of the top position-limiting, shock-absorbing and hollowing component extend laterally to the outside of the accommodating and connecting positioning groove. The top flexible connector is arranged between the transversely extending end of the top position-limiting, shock-absorbing and hollowing component and the bottom beam plate.

2. The anti-fall and seismic isolation bridge according to claim 1 is characterized in that: The limiting energy dissipation component is detachably arranged on the pier, and / or the accommodating connection positioning groove is a lateral opening groove with one side open, and / or the outer end surface of the bottom of the box beam body is recessed to form an inspection groove.

3. The anti-fall and seismic isolation bridge according to any one of claims 1 or 2, characterized in that: The position-limiting energy-absorbing component is arranged in the middle of the pier, and the support is arranged on the outside of the position-limiting energy-absorbing component; The position-limiting energy-consuming component comprises a rigid position-limiting box and a honeycomb energy-consuming mechanism, wherein the honeycomb energy-consuming mechanism is contained in the rigid position-limiting box, and comprises interconnected composite energy-consuming units and a foam filling material unit filling the composite energy-consuming units; The first lateral flexible connector, the second lateral flexible connector, and the top limit shock-absorbing and de-airing assembly are respectively connected to the rigid limit box.

4. The anti-fall and seismic isolation bridge according to claim 3 is characterized in that: The top of the pier is pre-buried with a pier top pre-buried connector, and the rigid limit box is a rectangular box; The rigid limiting box body includes a box bottom plate, four side plates, a box top plate and box stiffening ribs. The bottoms of the four side plates are fixedly connected to the box bottom plate through stiffening ribs, and the box top plate is arranged on the tops of the four side plates. The honeycomb energy dissipation mechanism is accommodated in a space enclosed by the box bottom plate, the four side plates and the box top plate, and the box bottom plate is fixedly connected to the pier top embedded connector.

5. The anti-fall and seismic isolation bridge according to claim 3 is characterized in that: The top limit shock-absorbing de-airing assembly comprises a distribution beam, a connection base and a connection vertical plate, wherein the connection base is fixedly arranged on the rigid limit box body, the first end of the connection vertical plate is fixedly arranged on the connection base, the second end of the connection vertical plate extends upward and extends into the box beam cavity, the distribution beam is arranged on the second end of the connection vertical plate, and a vertical gap is left between the end of the distribution beam and the bottom beam plate; The top flexible connectors are respectively disposed at both ends of the distribution beam, and the top flexible connectors are disposed between the bottom beam plate and the distribution beam.

6. The bridge with coordinated fall prevention and seismic isolation according to claim 5 is characterized in that: A first pre-embedded connecting piece is pre-embedded in the bottom beam plate; The top flexible connector includes a vertical spring and a top connecting steel plate. The top connecting steel plate is fixed on the surface of the bottom beam plate through the first embedded connector. The vertical spring is arranged in the vertical gap and elastically supported between the distribution beam and the top connecting steel plate.

7. The bridge with coordinated fall prevention and seismic isolation according to claim 3 is characterized in that: A second embedded connecting member is embedded in the transverse groove wall of the accommodating connection positioning groove, the first lateral flexible connecting member includes a first connecting steel plate, a first transverse spring and a second connecting steel plate, the first connecting steel plate is arranged on the transverse side wall of the rigid limiting box body, the second connecting steel plate is fixedly arranged on the transverse groove wall of the accommodating connection positioning groove through the second embedded connecting member, the first transverse spring elastically abuts between the first connecting steel plate and the second connecting steel plate, and / or a third embedded connecting member is embedded in the longitudinal groove wall of the accommodating connection positioning groove, the second lateral flexible connecting member includes a third connecting steel plate, a second transverse spring and a fourth connecting steel plate, the third connecting steel plate is arranged on the longitudinal side wall of the rigid limiting box body, the fourth connecting steel plate is fixedly arranged on the longitudinal groove wall of the accommodating connection positioning groove through the third embedded connecting member, and the second transverse spring elastically abuts between the third connecting steel plate and the fourth connecting steel plate.

8. The anti-fall and seismic isolation bridge according to claim 3 is characterized in that: The two box beam bodies are arranged on the bridge pier along the longitudinal direction, and the seismic isolation and fall prevention composite devices are arranged one by one with the box beam bodies. The two seismic isolation and fall prevention composite devices are arranged on the bridge pier along the longitudinal direction with intervals, and the rigid limiting box bodies of the seismic isolation and fall prevention composite devices are fixedly connected by an intermediate connecting mechanism.

9. A construction method for a bridge with coordinated fall prevention and seismic isolation, characterized in that: Used to construct the anti-fall-reduction-seismic isolation coordinated bridge as described in any one of claims 1 to 8, the anti-fall-reduction-seismic isolation coordinated bridge comprises a pier, a support and a box beam body, the box beam body is supported on the pier by the support, the top surface of the pier is pre-embedded with a pier top pre-embedded connector, the box beam body has a box beam cavity and a accommodating connection positioning groove connected to the box beam cavity, and the bottom beam plate of the box beam body is pre-embedded with a first pre-embedded connector, a second pre-embedded connector and a third pre-embedded connector; Includes steps: Modular installation of limited energy dissipation components; specifically including: The box bottom plate of the position-limiting energy-absorbing component is fixed on the top surface of the pier through the pre-embedded connector on the top of the pier; The composite energy dissipation unit and four side panels are installed on the bottom plate of the box. The bottom of the four side panels is fixedly connected to the bottom plate of the box through stiffening ribs. The top plate of the box is sealed after the foam material is filled to form a foam filling material unit. The first lateral flexible connector, the second lateral flexible connector, and the top limit shock-absorbing and de-airing assembly are modularly installed; specifically including: The first connecting steel plate is arranged on the transverse side wall surface of the rigid limit box body; the second connecting steel plate is fixedly arranged on the transverse groove wall surface of the accommodating connection positioning groove by the second embedded connecting member; the first transverse spring is elastically loaded between the first connecting steel plate and the second connecting steel plate; The third connecting steel plate is arranged on the longitudinal side wall surface of the rigid limit box; the fourth connecting steel plate is fixedly arranged on the longitudinal groove wall surface of the accommodating connection positioning groove through the third embedded connecting member; the second transverse spring is elastically loaded between the third connecting steel plate and the fourth connecting steel plate; By fixing one end of the connecting vertical plate on the rigid limit box body and supporting the distribution beam at the other end of the connecting vertical plate, the distribution beam is assembled in the box beam cavity. The first embedded connecting part fixes the top connecting steel plate on the surface of the bottom beam plate and elastically loads the vertical spring between the distribution beam and the top connecting steel plate.

10. A method for inspecting and maintaining a bridge with coordinated fall prevention and seismic isolation, characterized in that: Used for repairing the anti-fall-seismic isolation bridge as described in any one of claims 1 to 8, the bottom plate of the rigid limit box is detachably connected to the pre-embedded connector on the pier top, the top limit shock-absorbing de-airing assembly is detachably connected to the rigid limit box, the first connecting steel plate is detachably connected to the rigid limit box, and the third connecting steel plate is detachably connected to the rigid limit box; The top connecting steel plate is detachably connected to the first embedded connecting piece, the second connecting steel plate is detachably connected to the second embedded connecting piece, and the fourth connecting steel plate is detachably connected to the third embedded connecting piece; Includes steps: If there is an intermediate connecting mechanism, remove it; The first transverse spring, the first connecting steel plate and the second connecting steel plate are removed to complete the removal of the first lateral flexible connecting member, wherein the first connecting steel plate is arranged on the transverse side wall surface of the rigid limit box body, and the second connecting steel plate is fixedly arranged on the transverse groove wall surface of the accommodating connection positioning groove through the second embedded connecting member, and the first transverse spring is elastically supported between the first connecting steel plate and the second connecting steel plate; The second transverse spring, the third connecting steel plate and the fourth connecting steel plate are removed to complete the removal of the second lateral flexible connecting member, wherein the third connecting steel plate is arranged on the longitudinal side wall surface of the rigid limit box body, and the fourth connecting steel plate is fixedly arranged on the longitudinal groove wall surface of the accommodating connection positioning groove through the third embedded connecting member, and the second transverse spring is elastically supported between the third connecting steel plate and the fourth connecting steel plate; The top limit shock-absorbing de-airing assembly, the vertical spring and the top connecting steel plate are removed. The top connecting steel plate is fixed on the surface of the bottom beam plate through the first embedded connecting piece. The vertical spring is arranged in the vertical gap and elastically supported between the distribution beam and the top connecting steel plate. Dismantle the limited energy dissipation components and the embedded connectors on the pier top; Remove the old limit energy dissipation component from the inspection slot and install the new limit energy dissipation component; Reassemble using the construction method as described in claim 9.

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