CN215857173U - Bridge structure - Google Patents

Abstract

The application provides a pair of bridge structures, relates to the bridge construction field. The bridge structure comprises a bridge pier, a limiting support and a beam body, wherein the limiting support comprises a bottom plate, a supporting piece, two limiting pieces and a damping piece, the bottom plate is fixed on the bridge pier, the supporting piece is arranged above the bottom plate and can move along a first direction relative to the bottom plate, the two limiting pieces are arranged on two sides of the supporting piece along the first direction and are fixed with the bottom plate, and the damping piece is connected between each limiting piece and the supporting piece. Set up damping piece between supporter and locating part in this application, support when the supporter removes and push away damping piece, damping piece can provide the deformation energy of thrust consumption part roof beam body, reduces the removal displacement of supporter, and supporter and roof beam body fixed connection, and then has restricted the displacement of roof beam body deformation, avoids roof beam body bulging deformation to be greater than the clearance between the roof beam body, destroys the bridge.

Description

Bridge structure

Technical Field

The application relates to the field of bridge construction, in particular to a bridge structure.

Background

The bridge can contain a plurality of roof beam bodies on same horizontal plane, and a plurality of roof beam bodies are laid in proper order, leave certain gap between the adjacent roof beam body for the roof beam body provides the space of warping because of temperature effect etc.. The bridge pier and the beam body are connected through the support to support the beam body, the related bridge structure is connected between the bridge pier and the beam body through the fixed support or the movable support, but the deformation of the related bridge at the beam body due to the temperature effect is too large and the stress is not coordinated, the stress safety of the bridge structure is influenced, and the structure on the bridge is damaged.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiments of the present application provide a bridge structure to solve the problem that the beam bodies are damaged by being squeezed together after being deformed too much due to temperature effect.

The embodiment of the application provides a bridge structures includes: a bridge pier; spacing support fixes the pier top, spacing support includes: the bottom plate is fixed with the bridge pier; a support disposed above the floor, the support being movable in a first direction relative to the floor; the two limiting parts are symmetrically arranged on two sides of the supporting part in the first direction and are fixed with the bottom plate; a damping member connected between each of the limiting members and the supporting member; and a beam body fixed to an upper end of the support.

Further, the damping member is an elastic member.

Furthermore, each limiting support is provided with two elastic pieces which are symmetrically connected to two sides of the supporting piece and are respectively connected with the limiting piece on the side where the elastic pieces are located; or each limiting support is provided with one elastic piece, two opposite ends of each elastic piece are respectively connected with one corresponding limiting piece, and the elastic pieces are connected with the supporting pieces.

Furthermore, each beam body is correspondingly provided with two limiting supports which are respectively and correspondingly arranged at two opposite ends of the beam body.

Further, the bridge construction further comprises: the movable support is arranged between the pier and the beam body, is fixedly used for supporting the beam body and can move along the first direction relative to the pier.

Furthermore, each beam body is correspondingly provided with two movable supports which are respectively and correspondingly arranged at two opposite ends of the beam body, and one limiting support is arranged between the two movable supports.

Furthermore, each beam body is correspondingly provided with two movable supports, the two movable supports are correspondingly arranged at two opposite ends of the beam body respectively, two limiting supports are arranged between the two movable supports, and the distance from each limiting support to the adjacent movable support is the same.

Furthermore, each beam body is correspondingly provided with two limiting supports, the two limiting supports are correspondingly arranged at two opposite ends of the beam body respectively, the movable support is arranged between the two limiting supports, and the distance from each movable support to the adjacent limiting support is the same.

Furthermore, a sliding groove along the first direction is formed in the bottom plate, and the lower end of the supporting piece is abutted against the sliding groove; or a gap is formed between the lower end of the supporting piece and the bottom plate.

Further, the beam body has a plurality of, and two adjacent beam bodies have a gap in the first direction.

The embodiment of the application provides a bridge structures, including pier, spacing support, the roof beam body, spacing support includes bottom plate, supporter, two locating parts, damping piece, and the bottom plate is fixed on the pier, and the supporter sets up in the top of bottom plate, and the bottom plate can move along the first direction relatively, and two locating parts set up the both sides at the supporter along the first direction to it is fixed with the bottom plate, is connected with the damping piece between every locating part and the supporter. Be equipped with damping piece between supporter and the locating part in this application, thereby remove at the supporter and support under the circumstances of pushing away damping piece, damping piece can provide the deformation energy that the thrust consumed partial roof beam body, reduces the removal displacement of supporter, and supporter and roof beam body fixed connection, and then has restricted the displacement of roof beam body deformation, avoids roof beam body bulging deformation to be greater than the clearance between the roof beam body, destroys the bridge.

Drawings

Fig. 1 is a schematic view of a bridge structure provided in an embodiment of the present application;

fig. 2 is a schematic structural view of a limit support according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a base plate according to an embodiment of the present disclosure;

FIG. 4 is a top view of another spacing pedestal provided in embodiments of the present application;

FIG. 5 is a schematic structural diagram of a damping member according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of another damping member provided in the embodiments of the present application;

FIG. 7 is a schematic structural diagram of another damping member provided in the embodiments of the present application;

FIG. 8 is a schematic view of another bridge construction provided in the embodiments of the present application;

FIG. 9 is a schematic view of another bridge construction provided in the embodiments of the present application;

FIG. 10 is a schematic view of another bridge construction provided in the embodiments of the present application;

FIG. 11 is a schematic view of another bridge construction provided in the embodiments of the present application;

FIG. 12 is a schematic view of another bridge construction provided in the embodiments of the present application;

fig. 13 is a schematic structural diagram of another base plate according to an embodiment of the present application.

The figures show the description:

10-bridge pier; 20-limiting support; 21-a bottom plate; 211-a chute; 212-a threaded hole; 22-a support; 23-a stop; 24-a damping member; 241-junction; 30-a beam body; 40-movable support.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Various combinations of the specific features in the embodiments described in the detailed description may be made without contradiction, for example, different embodiments may be formed by different combinations of the specific features, and in order to avoid unnecessary repetition, various possible combinations of the specific features in the present application will not be described separately.

In the following description, reference to the term "first … …" merely distinguishes between different objects and does not indicate that there is identity or relationship between the objects. It should be understood that the references to "upper" and "upper" are to be interpreted as referring to the normal use position.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. The term "coupled", where not otherwise specified, includes both direct and indirect connections.

The application provides a bridge structures, is a mode that is used for supporting the bridge. The bridge is formed by sequentially arranging a plurality of beam bodies on the same horizontal plane, and is divided into a simple beam and a continuous beam according to the supporting mode of the beam bodies. The simply supported beam is only built on two supports at two ends of the beam body respectively; by continuous beam is meant a beam body having three or more supports.

The bridge structure provided by the application comprises a bridge pier 10, a limit support 20 and a beam body 30, wherein the limit support 20 is fixed above the bridge pier 10, as shown in fig. 1. Specifically, the pier 10 is a reinforced concrete structure, which is generally a cylinder or a rectangular parallelepiped or other shape. The pier 10 extends along the vertical direction, and a limiting support 20 is fixed on one end of the pier far away from the ground level. One end (lower end shown in fig. 1) of the stopper bracket 20 is fixed to the pier 10, and the other end (upper end shown in fig. 1) thereof is fixed to the girder 30. The fixing method of the limit bracket 20 to the pier 10 or the girder 30 may be bolt fixing, fixing riveting, welding, or the like. Alternatively, one limiting support 20 may be placed on one pier 10, or a plurality of limiting supports 20 may be placed, for example, two limiting supports 20 are arranged side by side on the pier 10, and a connecting line between the two limiting supports 20 may be perpendicular to the length direction of the beam 30 or parallel to the length direction of the beam 30.

As shown in fig. 2, the limit bracket 20 includes: a bottom plate 21, a supporting member 22, two limiting members 23 and a damping member 24, wherein the bottom plate 21 is used for being fixed with the pier 10 shown in fig. 1. Specifically, the bottom plate 21 is a flat plate, a fixing member is disposed on a surface of the bottom plate 21 close to the pier 10, and the fixing member is used for being fixedly connected with the pier 10, or a threaded hole is formed in the bottom plate 21, and a bolt penetrates through the threaded hole to be fixed with the pier 10. It should be noted that the number of the fixing members or the threaded holes may be one or more, for example, as shown in fig. 3, 4 threaded holes 212 are opened on the bottom plate 21 and respectively disposed at the edge of the bottom plate 21, each threaded hole 212 is located at one corner of the bottom plate 21, and a bolt penetrates through the threaded hole 212 to fix the bottom plate 21 to the pier 10. The support member 22 is disposed above the base plate 21, and the support member 22 is movable in a first direction relative to the base plate 21. Specifically, the supporting member 22 is a bearing member of the limit support 20 and is used for bearing the beam body 30. The supporting member 22 is located above the bottom plate 21 and perpendicular to the bottom plate 21, and one end of the supporting member 22 is fixedly connected to the beam 30, for example, a plurality of bolts are disposed at one end of the supporting member 22 close to the beam 30, corresponding holes are disposed on the beam 30, and the bolts of the supporting member 22 are matched with the holes on the beam 30, so as to fix the beam 30 to the supporting member 22. The supporting member 22 is movably connected with the bottom plate 21, and when the beam 30 moves due to vibration or temperature effect, the beam 30 is fixedly connected with the supporting member 22, so that the supporting member 22 is driven to move. The opposite sides of the support 22 may be provided with baffles blocking the direction of movement of the support 22 to define the direction of movement of the support 2. The first direction is a longitudinal direction of the beam 30, that is, an extending direction of the bridge.

As shown in fig. 2, the stoppers 23 are symmetrically disposed on both sides of the supporting member 22 in the first direction and fixed to the base plate 21. It should be noted that the first direction may be a length direction of the beam, that is, the limiting members 23 are symmetrically disposed on two sides of the supporting member 22 in the length direction of the beam. Specifically, the support 22 moves in the length direction of the beam 30, and the stopper 23 is disposed in the moving direction to block the support 22 from further moving. The stop 23 may be a stop fixed to the base plate 21, or may be another type of fastener, for example, the support 22 may be fixed to the fastener when the support 22 moves to a predetermined position, and the fastener may release the support 22 to allow the support 22 to move when the support 22 tends to move toward the stop at the other end.

As shown in fig. 2, a damping member 24 is connected between each of the limiting members 23 and the supporting member 22. Specifically, one end of the damping member 24 is connected to the limiting member 23, and the other end is connected to the supporting member 22. The damping member 24 provides a resistance to movement to limit the movement of the damping member 24, for example, in the case where the support member 22 moves to push the damping member 24, the damping member 24 generates a reverse thrust in the direction opposite to the movement of the support member 22, and the support member 22 reduces the displacement of the movement to some extent by the reverse thrust. The number of the damping members 24 may be one or more, for example, as shown in fig. 4, a plurality of parallel damping members 24 are provided between the retaining member 23 and the supporting member 22, one end of each damping member 24 is connected to one end of the retaining member 23, and the other end is connected to the supporting member 22, and when the supporting member 22 moves, the plurality of damping members 24 simultaneously provide resistance against the movement of the supporting member 22.

As shown in fig. 1 and 2, the beam body 30 is fixed to the upper end of the support 22. Specifically, the beam 30 is supported by the limit bracket 20, and the support 22 in the limit bracket 20 is used for being fixedly connected with the beam 30. The beam 30 has a plurality of adjacent two beams 30 having a gap in the first direction. Specifically, a plurality of beam bodies 30 are sequentially laid to form a bridge, and a certain gap exists between two adjacent beam bodies 30. When the beam bodies 30 expand due to the temperature effect, the gap between two adjacent beam bodies 30 becomes small, and when the temperature effect is too large, the deformation of two adjacent beam bodies 30 is larger than the gap, so that the two adjacent beam bodies 30 are extruded with each other, and the beam bodies 30 are damaged.

The application provides a pair of bridge structures, including pier, spacing support, the roof beam body, spacing support includes bottom plate, supporter, two locating parts, damping piece, and the bottom plate is fixed on the pier, and the supporter sets up in the top of bottom plate, and the first direction motion is followed to the bottom plate relatively, and two locating parts set up the both sides at the supporter along the first direction to it is fixed with the bottom plate, is connected with the damping piece between every locating part and the supporter. Set up damping piece between supporter and locating part in this application, support when the supporter removes and push away damping piece, damping piece can provide the deformation energy of thrust consumption part roof beam body, reduces the removal displacement of supporter, and supporter and roof beam body fixed connection, and then has restricted the displacement of roof beam body deformation, avoids roof beam body bulging deformation to be greater than the clearance between the roof beam body, destroys the bridge.

In some embodiments, as shown in FIG. 5, the damping member 24 is an elastomeric member. Specifically, the damping member 24 is configured as an elastic member, providing a certain elasticity, which is compressed by an external force to provide a force opposite to the external force, limiting the movement of the supporting member 22, and the damping member 24 can return to its original position when the external force is released. For example, as shown in fig. 6, the elastic members are symmetrically arranged with the support member 22 as a symmetry axis, a circular hole is formed in the middle of the elastic member, the support member 22 is inserted into the circular hole to fix the elastic member, and when the support member 22 moves, the elastic member on one side is compressed while the elastic member on the other side is stretched. For another example, a plurality of parallel elastic members are disposed between the limiting member 23 and the supporting member 22, one end of each elastic member is connected to one end of the limiting member 23, and the other end is connected to the supporting member 22, when the supporting member 22 moves, the plurality of elastic members on the same side are compressed at the same time, and the plurality of elastic members on the other side are stretched at the same time. When the force for driving the supporting member 22 becomes small or disappears, the supporting member 22 will return to the initial position under the action of the elastic member, so that the supporting member 22 provides a supporting function according to the deformation of the beam 30.

In some embodiments, each limit support 20 has two elastic members symmetrically connected to both sides of the supporting member 22 and respectively connected to the limit members 23 located at the sides thereof. Specifically, the elastic members are symmetrically disposed on both sides of the supporting member 22, wherein one end of the elastic member is connected to the supporting member 22, and the other end is connected to the limiting member 23. When the support member 22 moves, the elastic member on one side of the support member 22 is pushed and the elastic member on the other side is stretched, and the elastic members on both sides of the support member 22 simultaneously provide a force to prevent the support member 22 from moving, so as to reduce the displacement of the support member 22. Alternatively, as shown in fig. 7, each limiting support 20 has an elastic member, opposite ends of the elastic member are respectively connected to a corresponding limiting member 22, and the elastic member is connected to the supporting member. Specifically, the elastic member as a whole has three connecting positions 241 respectively disposed at two ends and in the middle of the elastic member, and the distances from the connecting position 241 in the middle to the connecting positions 241 at the two ends are substantially the same. The connecting positions 241 at the two ends are respectively connected with the limiting members 23 at the two ends of the limiting support 20, and the connecting position 241 in the middle is connected with the supporting member 22. When the support element 22 is forced to move, the force applied to the elastic element is divided into two sections, one of which is stretched when the force is applied and the other of which is compressed when the force is applied, so as to double the resistance limiting the movement of the support element 22 when the elastic element is under the same deformation. Alternatively, the resilient member may be an elastic damping member, which may provide elastic damping, both to dissipate a portion of the deformation energy of the beam 30 and to provide damping against the support member 22.

In some embodiments, as shown in fig. 8, two limit brackets 20 are disposed on each of the beams 30, respectively at two opposite ends of the beams 30. Specifically, when the length of the beam 30 is short, only two ends of the beam 30 in the length direction are respectively connected to the limit brackets 20, and no other support is provided between the limit brackets 20 at the two ends. For example, the length of the beam 30 may be 30m, 40m, etc. When the beam 30 vibrates or expands or contracts due to temperature effect, the beam 30 is displaced in a first direction, the beam 30 is fixedly connected with the supporting member 22, the displacement of the beam 30 drives the movement of the supporting member 22, and the supporting member 22 offsets a part of deformation energy under the action of the damping member 24, so that the displacement of the supporting member 22 is reduced. The limiting support 20 is arranged at two ends of the beam body 30, and deformation symmetry of the beam body 30 in the first direction is guaranteed, so that contact extrusion between adjacent beam bodies 30 is further avoided, and the bridge is damaged. It should be noted that the number of the limiting supports 20 may also be more than two, and is not limited to two, for example, two ends of the beam 30 are respectively supported by two limiting supports 20, the limiting supports 20 at each end are arranged in parallel on the pier 10, and a connecting line between the limiting supports 20 at the same end is perpendicular to the length direction of the beam.

In some embodiments, as shown in fig. 9, the bridge construction further comprises: and a movable abutment 40, the movable abutment 40 being disposed between the pier 10 and the girder 30, being fixed to the girder 30 to support the girder 30, and being movable in a first direction (a left-right direction shown in fig. 9) with respect to the pier 10. It should be noted that the movable support refers to a movable and slidable connection rather than a fixed connection with the beam body, so as to allow the beam body 30 to move telescopically in the first direction. Specifically, one end of the movable support 40 is fixedly connected to the beam 30, and the other end can slide on the pier 10, for example, a pulley is disposed on one end of the movable support 40 close to the pier 10, a slide is disposed on the pier 10, and the pulley can slide back and forth on the slide to enable the movable support 40 to move in the first direction. The first direction is a longitudinal direction of the beam, that is, a direction in which the bridge extends.

In some embodiments, as shown in fig. 10, two movable supports 40 are provided for each beam 30, and are respectively disposed at two opposite ends of the beam 30, and a limit support 20 is disposed between the two movable supports. Specifically, one beam 30 has three supports, one at each end of the beam 30 and one between the ends. Optionally, the supporting positions of the beam 30 are respectively located at two ends of the beam 30 and a middle point with the same distance from the two ends, the supporting positions at the two ends of the beam 30 are respectively fixedly connected with the movable support 40, and the supporting position in the middle of the beam 30 is fixedly connected with the limit support 20. The beam 30 as a whole can move integrally under the action of vibration or temperature effect, and the limit support 40 can support the moving displacement of the support 22, thereby reducing the moving distance of one end of the beam 30. Alternatively, a plurality of supports may be disposed at each support of the beam 30 side by side, for example, two movable supports 40 are connected to both ends of the beam 30, and a connecting line between the two movable supports 40 at each end is perpendicular to the length direction of the beam 30.

In some embodiments, as shown in fig. 11, each beam 30 has two movable supports 40, the two movable supports 40 are respectively disposed at two opposite ends of the beam 30, and two limit supports 20 are disposed between the two movable supports 40. The distance from each limit bracket 20 to the adjacent movable bracket 40 is the same. Specifically, each beam 30 is respectively supported by two movable supports 40 and two limit supports 20, wherein the two movable supports 40 are respectively disposed at two ends of the beam 30, the two limit supports 20 are respectively disposed between the two movable supports 40, and the distance from each limit support 20 to the movable support 40 at a closer distance is the same. The beam 30 is supported by the limit bracket 20 and the movable bracket 40, so that the beam 30 is movably fixed, that is, the beam 30 can move in the length direction of the beam 30. In actual environment, the beam 30 is irregularly deformed due to the temperature effect, that is, the beam 30 is not uniformly deformed, but is deformed more in some places and less in some places. When the beam 30 deforms, the supporting member 22 in the limit support 20 and the movable support 40 is driven to move, the damping member 24 of the limit support 20 can absorb a part of deformation energy to limit the movement displacement of the supporting member 22, so that the movement displacement of the beam 30 is reduced, and the distances between the movable supports at which the limit support 20 is closer to are the same, that is, the movable support 40 and the limit support 20 are symmetrically arranged by taking the center line of the beam 30 as a symmetry axis, so that the center line of the beam 30 is perpendicular to the length direction of the beam 30 and has the same distance to two ends of the beam 30. When the two limiting supports 20 are deformed unevenly due to the beam 30, the two limiting supports receive different forces, so that the moving distances of the two ends of the beam 30 are different, and at the moment, the beam 30 continues to move until the moving displacements of the two ends of the beam 30 are the same, so that the two ends of the beam 30 can move evenly, and the moving displacements of the two ends of the beam 30 are the same. Alternatively, a plurality of supports may be disposed side by side at each support of the girder 30, for example, two movable supports 40 are connected to both ends of the girder 30, a connection line between the two movable supports 40 at each end is perpendicular to the length direction of the girder 30, two limit supports 20 are disposed side by side on each pier 10 between the movable supports 40, and a connection line between the two limit supports 20 is perpendicular to the length direction of the girder 30.

In some embodiments, as shown in fig. 12, each beam 30 has two limit brackets 20, the two limit brackets 20 are respectively disposed at two opposite ends of the beam 30, a movable bracket 40 is disposed between the two limit brackets 20, and the distance from each movable bracket 40 to the adjacent limit bracket 30 is the same. Specifically, two limit supports 20 are respectively arranged at two ends of the beam body 30, the movable supports 40 are respectively arranged between the two limit supports 20 to support the beam body 30 in an auxiliary manner, wherein the distance between each of the two movable supports 40 and the closer limit support 30 is the same, and the movable supports 40 are arranged symmetrically by taking the central line of the beam body 30 as a symmetry axis. The center line of the beam 30 is perpendicular to the longitudinal direction of the beam 30, and has the same distance to both ends of the beam 30. The limit supports 20 and the movable supports 40 are symmetrically arranged respectively to limit the moving distance of the two ends of the beam body 30 and make the moving distance of the two ends equal.

In some embodiments, as shown in fig. 13, the bottom plate 21 is provided with a sliding groove 211 along the first direction, and the lower end of the support 22 abuts against the sliding groove 211. Specifically, the bottom plate 21 has a sliding groove 21 in the same length direction as the beam, one end of the support 22 is connected to the beam 30, and the other end slides back and forth in the sliding groove 211, for example, the sliding groove 211 is a rectangular groove, and one end of the support 22 contacting the groove is a rectangular slider, and the support 22 can move in the rectangular groove through the rectangular slider, so that the support 22 can move in the length direction of the beam 30. Or the end of the support member 22 has a gap from the bottom plate 21. Specifically, the support 22 needs to move back and forth along the length direction of the beam 30, and a gap is left between one end of the support 22 close to the bottom plate 21 and the bottom plate 21 to prevent the bottom plate 21 from contacting the support 22 to affect the movement of the support.

The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application.

Claims (10)

1. A bridge construction, comprising:

a bridge pier;

spacing support fixes the pier top, spacing support includes:

the bottom plate is fixed with the bridge pier;

a support disposed above the floor, the support being movable in a first direction relative to the floor;

the two limiting parts are symmetrically arranged on two sides of the supporting part in the first direction and are fixed with the bottom plate;

a damping member connected between each of the limiting members and the supporting member;

and a beam body fixed to an upper end of the support.

2. The bridge construction of claim 1, wherein the damping member is an elastic member.

3. The bridge structure according to claim 2, wherein each limit support has two said elastic members symmetrically connected to both sides of said supporting member and respectively connected to said limit members located at the sides thereof; or each limiting support is provided with one elastic piece, two opposite ends of each elastic piece are respectively connected with one corresponding limiting piece, and the elastic pieces are connected with the supporting pieces.

4. The bridge structure according to claim 1 or 2, wherein each beam body is provided with two corresponding limiting supports respectively arranged at two opposite ends of the beam body.

5. The bridge construction of claim 1 or 2, further comprising:

the movable support is arranged between the pier and the beam body, is fixedly used for supporting the beam body and can move along the first direction relative to the pier.

6. The bridge structure according to claim 5, wherein each beam body is provided with two corresponding movable supports respectively arranged at two opposite ends of the beam body, and one limiting support is arranged between the two movable supports.

7. The bridge structure according to claim 5, wherein each beam body has two movable supports, the two movable supports are respectively disposed at two opposite ends of the beam body, two limiting supports are disposed between the two movable supports, and the distance from each limiting support to the adjacent movable support is the same.

8. The bridge structure according to claim 5, wherein each beam body is correspondingly provided with two limiting supports, the two limiting supports are correspondingly arranged at two opposite ends of the beam body respectively, the movable support is arranged between the two limiting supports, and the distance from each movable support to the adjacent limiting support is the same.

9. A bridge construction according to claim 1, 2, 3, 6, 7 or 8, wherein the bottom plate is provided with a runner in the first direction, the lower end of the support member abutting the runner;

or a gap is formed between the lower end of the supporting piece and the bottom plate.

10. A bridge construction according to claim 1, 2, 3, 6, 7 or 8, wherein the plurality of beams has a gap between two adjacent beams in the first direction.

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