CN214939187U - Large-span normally-conductive high-speed magnetic suspension bridge parting structure - Google Patents

Abstract

The utility model relates to a large-span normal-conduction high-speed magnetic suspension bridge parting structure, which comprises a large-span beam, a parting carrier beam, a girder-spanning seam trabecula, N parting trabeculae and a chain rod hinge system for synchronously pushing the N parting trabeculae and the large-span beam to move in the same direction; the movable end of the large-span beam is provided with a first step part, the fixed end of the split bearing beam is provided with a second step part, and the fixed end and the movable end of the small beam across the large beam are respectively arranged on the first step part and the second step part; the N seam-separating small beams are sequentially arranged on the horizontal plane of the second step part at intervals along the bridge direction and are positioned between the vertical plane of the second step part and the seam-crossing small beams; the chain rod hinge system is arranged on the parting bearing beam, one end of the chain rod hinge system is connected with the movable end of the large-span beam, and the other end of the chain rod hinge system is respectively connected with the N parting small beams. The utility model discloses can improve the ride comfort of bridge floor, the theoretical synchronous drive parting is realized to the fact, improves maglev train comfort level that traveles, improves the safety and stability of high-speed driving.

Description

Large-span normally-conductive high-speed magnetic suspension bridge parting structure

Technical Field

The utility model belongs to the technical field of the high-speed magnetic levitation bridge beam seam device is led to the large-span usual, concretely relates to high-speed magnetic levitation bridge parting structure is led to the large-span usual.

Background

The normal-conducting high-speed maglev has extremely high requirements on the smoothness of a long spindle track, and related researches show that the maglev bow frame is greatly influenced by gap change and a beam end corner when passing through the pier top, the electromagnet vibrates greatly, the reason is mainly that the track is unsmooth caused by the electromagnet, and the bottleneck is limited in running of a high-speed train, so that the reduction of the beam gap change and the reduction of the protruding unsmooth amount of the beam end corner play a very important role in improving running of the normal-conducting high-speed maglev train, and particularly the wide expansion joint of a large-span bridge becomes a limiting bottleneck.

Chinese patent No. CN202298456U discloses a large displacement bridge expansion device suitable for high-speed magnetic levitation traffic engineering, which is skillfully designed and theoretically has the characteristic of uniform and synchronous expansion of dispersed small seams, but as with other types of seam dividing devices, the expansion device starts driving force from an expansion movable end to the other end, and finally transmits the driving force to all seams after gradually overcoming friction force, that is, the synchronism of the expansion device and the seam dividing device is the same as the principle; in addition, in the patent of publication CN202298456U, the telescopic device is laid on a non-planar surface with flexural deformation, so that in operation, the link system in the device is subjected to bending from outside the plane of deformation, and therefore, the link system is prone to mechanical "locking" phenomenon to cause temporary failure, which affects the reliability and durability of the device, and is a potential safety hazard for magnetic levitation transportation.

Disclosure of Invention

In order to overcome the not enough of above-mentioned prior art existence, the utility model aims at providing a high-speed magnetic suspension bridge parting structure is led always to large-span can improve the ride comfort of bridge floor, and the theoretical synchronous drive parting is realized to the fact, improves the magnetic suspension train comfort level of traveling, improves the safety and stability of high-speed driving.

In order to achieve the purpose, the technical scheme of the utility model is that the joint structure of the large-span normally-conducting high-speed magnetic suspension bridge comprises a large-span beam, a joint bearing beam, a girder-spanning joint small beam, N joint small beams and a chain rod hinge system for synchronously pushing the N joint small beams to move in the same direction with the large-span beam, wherein N is more than or equal to 1; the movable end of the large-span beam is provided with a first step part which is sunken downwards, the fixed end of the split bearing beam is provided with a second step part which is sunken downwards, and the fixed end and the movable end of the small beam across the large beam are respectively arranged on the horizontal plane of the first step part and the horizontal plane of the second step part; the N seam-separating small beams are sequentially arranged on the horizontal plane of the second step part at intervals along the bridge direction and are all positioned between the vertical plane of the second step part and the girder-crossing seam small beam; the chain rod hinge system is arranged on the split bearing beam, one end of the chain rod hinge system is connected with the movable end of the large-span beam, and the other end of the chain rod hinge system is connected with the N split small beams respectively.

Further, the large spanA girder seam is arranged between the movable end of the beam and the fixed end of the split bearing beam; trabecular seams are arranged between the split trabeculae and the vertical surface of the second step part, between the split trabeculae and the girder spanning the girder seam, and the expansion amount of each trabecular seam is equal to that of the girder seam

Further, the chain bar articulation system comprises a first horizontal drive chain bar, a first displacement reverse chain bar, a second horizontal drive chain bar, and N second displacement reverse chain bars; one end of the first horizontal driving chain rod is connected with the movable end of the large-span beam through a fixed hinge, and the other end of the first horizontal driving chain rod is connected with one end of the first displacement reverse chain rod through a movable hinge; the other end of the first displacement reverse chain rod is connected with the second horizontal driving chain rod through a movable hinge; one end of each of the N second displacement reverse chain rods is connected with the N split small beams through a movable hinge, and the other end of each of the N second displacement reverse chain rods is connected with the second horizontal driving chain rod through a movable hinge; the first displacement reverse chain rod and the N second displacement reverse chain rods are respectively connected with the split bearing beam through fixed hinges.

Furthermore, the distance between the fixed hinge on the first displacement reverse link rod and the movable hinge at the two ends of the first displacement reverse link rod is equal.

Furthermore, along the direction from the vertical surface of the second step part to the girder crossing the seam, the ratio of the distance between the fixed hinge on each second displacement reverse chain rod and the movable hinge at the corresponding seam small girder end to the distance between the fixed hinge and the movable hinge on the second horizontal driving chain rod is sequentially

Furthermore, each split small beam is fixed with a pressure spring seat, each pressure spring seat is provided with a cavity with an upward opening, a pressure spring and a pressure lever are installed in each cavity, one end of each pressure lever is inserted into each cavity and connected with the corresponding pressure spring seat through the pressure spring, and the other end of each pressure lever is connected with the corresponding second displacement reverse link rod through a movable hinge.

Furthermore, a slide way is arranged on the horizontal plane of the second step part, and a sliding support is arranged on the bottom surface of each seam-dividing trabecula and is connected with the slide way in a sliding manner.

Furthermore, the fixed end of the girder spanning the large seam is arranged on the first step part through a longitudinal fixed support, and the movable end of the girder spanning the large seam is arranged on the second step part through a longitudinal movable support.

Further, the bottom surface of the girder-spanning seam trabecula is connected with the horizontal surface of the first step part through a tension spring.

Furthermore, the split bearing beam is arranged between the medium-small span beam and the large span beam; and the movable end of the large-span beam and the fixed end of the split bearing beam are respectively arranged on the side pier through a longitudinal movable support and a longitudinal fixed support, and the movable end of the split bearing beam and the end part of the medium-small span beam are respectively arranged on the pier through a longitudinal movable support and a longitudinal fixed support.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the utility model effectively avoids the influence of beam end corners and beam body bending deformation by crossing the girder seam trabecula, improves the smoothness of the bridge floor, synchronously pushes each slit trabecula by means of a chain rod hinge system, and disperses large expansion joints which can not be exceeded by a normally-conductive maglev train into small expansion joints meeting the technical requirements, thereby reducing the vibration of electromagnets, improving the running comfort of the maglev train and improving the safety and stability of high-speed driving;

(2) the utility model discloses a design and the fixed hinge on the second displacement reverse chain pole that each minute joint trabecula is connected on the proportion of the second displacement reverse chain pole part of below, transmit same big flexible volume to each minute joint trabecula according to predetermined proportional relation, make girder seam flexible volume when T, the flexible volume of N little roof beam seam is T/N, thereby realize that equivalent is synchronous equally divide a large amount of flexible volumes, the fact realizes theoretical synchronous drive parting, avoid the condition that progressively promotes from one end to the other end;

(3) the utility model discloses a pressure spring exerts pressure to the slit trabecula, avoids the slit trabecula to produce the possibility of 'beating' because of the dead weight is lighter when receiving the electromagnetic force effect to do benefit to the safety and stability of high-speed driving, adapt to the rotation needs of the reverse chain pole 17 of second displacement simultaneously.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a perspective view of a large-span normally-conductive high-speed magnetic levitation bridge parting structure provided by the embodiment of the utility model;

fig. 2 is a plan view of a large-span normally-conductive high-speed magnetic levitation bridge parting structure provided by the embodiment of the present invention;

FIG. 3 is a view A-A of FIG. 1;

FIG. 4 is a view B-B of FIG. 1;

FIG. 5 is a view C-C of FIG. 1;

FIG. 6 is a D-D view of FIG. 1;

in the figure: 1. a large span beam; 2. parting the carrier beam; 3. a medium and small span beam; 4. a girder is arranged across the girder gap; 5. splitting small beams; 6. a sliding support; 7. a longitudinal fixed support; 8. a longitudinal movable support; 9. side piers; 10. a bridge pier; 11. fixing the hinge; 12. a movable hinge; 13. a pressure spring; 14. a first horizontal drive link; 15. a first displacement reversing chain bar; 16. a second horizontal drive link; 17. a second displacement reverse link; 18. girder seams; 19. a trabecular seam; 20. a tension spring; 21. a slideway.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1-2, the present embodiment provides a large-span normally-conducting high-speed magnetic levitation bridge seam structure, which includes a large-span beam 1, a seam-dividing carrier beam 2, a girder-spanning seam trabecula 4, N seam-dividing trabeculae 5, and a chain link hinge system for synchronously pushing the N seam-dividing trabeculae 5 to move in the same direction as the large-span beam 1, where N is greater than or equal to 1; the movable end of the large-span beam 1 is provided with a first step part which is sunken downwards, the fixed end of the split bearing beam 2 is provided with a second step part which is sunken downwards, and the fixed end and the movable end of the small beam 4 spanning the large beam are respectively arranged on the horizontal plane of the first step part and the horizontal plane of the second step part; the N seam-crossing small beams 5 are sequentially arranged on the horizontal plane of the second step part at intervals along the bridge direction and are all positioned between the vertical plane of the second step part and the cross-beam seam small beam 4; the chain rod hinge system is arranged on the parting carrier beam 2, one end of the chain rod hinge system is connected with the movable end of the large-span beam 1, and the other end of the chain rod hinge system is respectively connected with the N parting small beams 5. In the embodiment, the influence of the corner area at the beam end is avoided by the small beam 4 crossing the girder seam, and the smoothness of the bridge deck is improved, thereby being beneficial to the stability of high-speed driving; meanwhile, the chain rod hinge system synchronously pushes the split small beams 5, the expansion amount of the large-span beam 1 is dispersed on the split small beams 5, the chain rod hinge system is arranged on a very flat surface through the split bearing beam 2, reliable guarantee is provided for the chain rod hinge system, and the phenomenon of locking is avoided.

Further, a girder gap 18 is formed between the movable end of the large span beam 1 and the fixed end of the split bearing beam 2; small beam seams 19 are arranged between the split small beam 5 and the vertical surface of the second step part, between the split small beams 5 and between the split small beam 5 and the girder 4 spanning the large beam seam, and the expansion amount of each small beam seam 19 is equal to that of the large beam seam 18

Further, the chain bar articulation system comprises a first horizontal drive chain bar 14, a first displacement counter chain bar 15, a second horizontal drive chain bar 16 and N second displacement counter chain bars 17; one end of the first horizontal driving chain rod 14 is connected with the movable end of the large-span beam 1 through a fixed hinge 11, and the other end of the first horizontal driving chain rod is connected with one end of the first displacement reverse chain rod 15 through a movable hinge 12; the other end of the first displacement reverse link rod 15 is connected with the second horizontal driving link rod 16 through a movable hinge 12; one end of each of the N second displacement reverse chain rods 17 is connected with the N small split beams 5 through a movable hinge 12, and the other end of each of the N second displacement reverse chain rods 17 is connected with the second horizontal driving chain rod 16 through a movable hinge 12; the first displacement reversal chain bar 15 and the N second displacement reversal chain bars 17 are connected with the parting carrier beam 2 by a fixed hinge 11. In this embodiment, when the large-span beam 1 moves, the first horizontal driving chain rod 14 connected to the movable end of the large-span beam 1 drives the whole chain rod hinge system, and the first horizontal driving chain rod 14, the first displacement reverse chain rod 15, the second horizontal driving chain rod 16 and the second displacement reverse chain rod 17 realize that the small split beams 5 move in the same direction as the large-span beam 1, and each small split beam 5 is connected to the same second horizontal driving chain rod 16 through the second displacement reverse chain rod 17, so as to ensure that each small split beam 5 moves synchronously.

Further, the distance between the fixed hinge 11 of the first displacement reversal chain bar 15 and the movable hinges 12 at both ends of the first displacement reversal chain bar 15 is equal. As shown in fig. 1, the fixed hinge 11 of the first displacement counter link 15 is located at the center of the first displacement counter link 15 in the length direction in this embodiment, thereby transmitting the girder expansion T to the second horizontal driving link 16 in reverse and equally.

Further, along the direction from the vertical plane of the second step part to the girder 4, the ratio of the distance between the fixed hinge 11 of each second displacement reverse link rod 17 and the movable hinge 12 of the corresponding split girder end to the distance between the fixed hinge 11 and the corresponding movable hinge 12 of the second horizontal driving link rod 16 is successively

As shown in fig. 1, in the present embodiment, the position of the fixed hinge 11 on each second displacement reverse link 17, i.e. the length ratio of the second displacement reverse link 17 above and below the fixed hinge 11, is designed, so that the displacement-T of the second horizontal driving link 16 is proportionally and reversely transmitted to the split trabeculae 5, and the expansion and contraction amounts of the 5 trabeculae 19 are equal and are all the expansion and contraction amounts of the main beam slits 18

And a large amount of expansion and contraction amount can be synchronously and uniformly distributed in an equal amount.

The number N of the small split beams 5 in the embodiment is determined according to the split requirement, wherein N is more than or equal to 1; the principle of the present invention will be described in detail by taking 4 slit trabeculae 5 as an example:

as shown in fig. 1 to 6, when 4 small split beams 5 are arranged on the horizontal plane of the second step part of the split load-bearing beam 2, 5 small split beam seams 19 are totally arranged between the small split beams 5 and the vertical plane of the second step part, between the small split beams 5 and the small beam across the large split beam seam 4; the length proportions of the second displacement reverse chain bars 17 above and below the fixed hinge 11 on each second displacement reverse chain bar 17 are 1/5, 2/5, 3/5 and 4/5 respectively along the direction from the vertical plane of the second step part to the girder-crossing seam trabecula 4, namely from left to right;

when the system is heated up, the large-span beam 1 pushes a displacement T to the left, the displacement T is transmitted to the second horizontal driving chain rod 16 through the first horizontal driving chain rod 14 and the first displacement reverse chain rod 15, the-T is transmitted to the split small beams 5 in proportion and reverse direction through the second displacement reverse chain rod 17, each split small beam 5 generates displacement which is the same as the large-span beam 1 in direction and sequentially has the size of T1 which is T/5, T2 which is 2T/5, T3 which is 3T/5 and T4 which is 4T/5 from left to right according to the position of the fixed hinge 11 on the second displacement reverse chain rod 17, the split small beam 4 directly moves the large-span beam 1 to the left along with the longitudinal fixed support 7 at the right end of the split small beam 4, so that when the large-span beam 1 pushes a displacement T to the left, each split small beam 5 also pushes the left, and the expansion amount of each trabecular seam 19 is kept to be T/5, thereby realizing the synchronous and uniform distribution of a large amount of expansion amount with equal quantity.

In this embodiment, the lengths of the second displacement reversing links 17 may be equal or different, so long as the length ratio of the second displacement reversing links 17 above and below the fixed hinge 11 on each second displacement reversing link 17 meets the above requirement.

Furthermore, each split small beam 5 is fixed with a compression spring seat, the compression spring seat is provided with a cavity with an upward opening, a compression spring 13 and a compression rod are installed in the cavity, one end of the compression rod is inserted into the cavity and connected with the compression spring seat through the compression spring 13, and the other end of the compression rod is connected with a corresponding second displacement reverse link rod 17 through a movable hinge 12. As shown in fig. 3 to 6, in this embodiment, two ends of the shaft of the movable hinge 12 on the second displacement reverse link 17 for connecting with the split small beam 5 are both connected with pressure levers, and the pressure levers are respectively inserted into the cavities of the corresponding pressure spring seats on the split small beam 5 and connected with the bottom surface of the cavity through the pressure springs 13, and apply pressure to the split small beam 5 through the pressure springs 13, and meanwhile, adapt to the rotation of the second displacement reverse link 17.

Furthermore, a slide rail 21 is arranged on the horizontal plane of the second step part, a sliding support 6 is arranged on the bottom surface of each seam-dividing trabecula 5, and the sliding support 6 is connected with the slide rail 21 in a sliding manner. In this embodiment, the slideways 21 correspond to the sliding supports 6 one to one, the sliding supports 6 mounted on the bottom surfaces of the seam-dividing small beams 5 are in sliding fit with the slideways 21 arranged on the horizontal plane of the second step portion, so that the sliding of each seam-dividing small beam 5 on the horizontal plane of the second step portion is realized, and meanwhile, the pressure springs 13 prevent the seam-dividing small beams 5 from jumping off the slideways 21. Since the high-speed magnetic levitation has a very high requirement on the smoothness of the track system, the slideway 21 can also adopt a special guide rail device.

Further, the fixed end of the girder 4 across the large beam seam is arranged on the first step part through a longitudinal fixed support 7, and the movable end of the girder 4 across the large beam seam is arranged on the second step part through a longitudinal movable support 8.

Further, the bottom surface of the girder bridging slit 4 is connected to the level of the first step portion by a tension spring 20. In the embodiment, the small beam 4 across the girder gap can be properly lengthened and weighed, which is beneficial to improving the smoothness; and the bottom surface of the girder 4 across the large span seam is connected with the large span beam 1 through the tension spring 20 to resist the jumping caused by the vibration, so that the girder 4 across the large span seam is stable enough.

Further, the split bearing beam 2 is arranged between the medium and small span beam 3 and the large span beam 1; and the movable end of the large span beam 1 and the fixed end of the split bearing beam 2 are respectively arranged on the side pier 9 through a longitudinal movable support 8 and a longitudinal fixed support 7, and the movable end of the split bearing beam 2 and the end part of the middle and small span beam 3 are respectively arranged on the pier 10 through the longitudinal movable support 8 and the longitudinal fixed support 7.

The functional components are arranged on the two sides of the small split beam 5 along the bridge direction, the length of the small split beam 5 is 3.096 meters long, and the length of the small beam 4 spanning the large beam is an integral multiple of 3.096 meters long.

The utility model discloses when guaranteeing to realize the parting, through crossing girder seam trabecula 4 the outstanding sharp point that the beam-ends corner deformation produced cuts off the paper-back, thereby reduced the bridge floor (promptly the rail surface) not smooth and easy, in order to do benefit to the stationarity of high-speed driving, still through the parting carrier bar 2 that rigidity is great, put the chain bar articulated system and parting beam sliding system on very level surface and can provide reliable guarantee for it; meanwhile, the same large expansion amount is transmitted to each seam trabecula 5 according to a preset proportional relation through the proportional arrangement of the fixed hinge position of the second displacement reverse chain rod 17, so that the aim of complete synchronization is fulfilled. Compared with the prior art, the utility model discloses it is more reliable on the processing of normal high-speed magnetic levitation railway large-span expansion joint device, very has practical meaning to realizing the high-speed magnetic levitation railway of speed target 600km/h and above.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a high-speed magnetic levitation bridge parting structure is led to large-span normal times which characterized in that: the large span beam is connected with the large span beam through a chain rod hinge system, and the chain rod hinge system is used for synchronously pushing the N split small beams to move in the same direction with the large span beam; the movable end of the large-span beam is provided with a first step part which is sunken downwards, the fixed end of the split bearing beam is provided with a second step part which is sunken downwards, and the fixed end and the movable end of the small beam across the large beam are respectively arranged on the horizontal plane of the first step part and the horizontal plane of the second step part; the N seam-separating small beams are sequentially arranged on the horizontal plane of the second step part at intervals along the bridge direction and are all positioned between the vertical plane of the second step part and the girder-crossing seam small beam; the chain rod hinge system is arranged on the split bearing beam, one end of the chain rod hinge system is connected with the movable end of the large-span beam, and the other end of the chain rod hinge system is connected with the N split small beams respectively.

2. The large-span normally-conductive high-speed magnetic levitation bridge parting structure of claim 1, wherein: a girder seam is arranged between the movable end of the large-span beam and the fixed end of the split bearing beam; trabecular seams are arranged between the split trabeculae and the vertical surface of the second step part, between the split trabeculae and the girder spanning the girder seam, and the expansion amount of each trabecular seam is equal to that of the girder seam

3. The large-span normally-conductive high-speed magnetic levitation bridge parting structure of claim 1, wherein: the chain bar articulation system comprises a first horizontal drive chain bar, a first displacement reverse chain bar, a second horizontal drive chain bar, and N second displacement reverse chain bars; one end of the first horizontal driving chain rod is connected with the movable end of the large-span beam through a fixed hinge, and the other end of the first horizontal driving chain rod is connected with one end of the first displacement reverse chain rod through a movable hinge; the other end of the first displacement reverse chain rod is connected with the second horizontal driving chain rod through a movable hinge; one end of each of the N second displacement reverse chain rods is connected with the N split small beams through a movable hinge, and the other end of each of the N second displacement reverse chain rods is connected with the second horizontal driving chain rod through a movable hinge; the first displacement reverse chain rod and the N second displacement reverse chain rods are respectively connected with the split bearing beam through fixed hinges.

4. The large-span normally-conductive high-speed magnetic levitation bridge parting structure of claim 3, wherein: the distance between the fixed hinge on the first displacement reverse chain rod and the movable hinges at the two ends of the first displacement reverse chain rod is equal.

5. The large-span normally-conductive high-speed magnetic levitation bridge parting structure of claim 4, wherein: the ratio of the distance between the fixed hinge on each second displacement reverse chain rod and the movable hinge at the corresponding split small beam end to the distance between the fixed hinge and the corresponding movable hinge on the second horizontal driving chain rod is sequentially from the vertical surface of the second step part to the direction of the beam spanning the large beam and the slit small beam

6. The large-span normally-conductive high-speed magnetic levitation bridge parting structure of claim 3, wherein: and a pressure spring seat is fixed on each split small beam, the pressure spring seat is provided with a cavity with an upward opening, a pressure spring and a pressure lever are installed in the cavity, one end of the pressure lever is inserted into the cavity and connected with the pressure spring seat through the pressure spring, and the other end of the pressure lever is connected with the corresponding second displacement reverse link rod through a movable hinge.

7. The large-span normally-conductive high-speed magnetic levitation bridge parting structure of claim 1, wherein: and a slide way is arranged on the horizontal plane of the second step part, and a sliding support is arranged on the bottom surface of each seam-dividing small beam and is connected with the slide way in a sliding manner.

8. The large-span normally-conductive high-speed magnetic levitation bridge parting structure of claim 1, wherein: the fixed end of the girder spanning the large beam seam is arranged on the first step part through a longitudinal fixed support, and the movable end of the girder spanning the large beam seam is arranged on the second step part through a longitudinal movable support.

9. The large-span normally-conductive high-speed magnetic levitation bridge parting structure of claim 8, wherein: the bottom surface of the girder spanning the large seam is connected with the horizontal surface of the first step part through a tension spring.

10. The large-span normally-conductive high-speed magnetic levitation bridge parting structure of claim 1, wherein: the split bearing beam is arranged between the medium and small span beam and the large span beam; and the movable end of the large-span beam and the fixed end of the split bearing beam are respectively arranged on the side pier through a longitudinal movable support and a longitudinal fixed support, and the movable end of the split bearing beam and the end part of the medium-small span beam are respectively arranged on the pier through a longitudinal movable support and a longitudinal fixed support.

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