Bridge supporting restraint system and lateral restraint support thereof

Abstract

The invention discloses a bridge supporting and restraining system and lateral restraining supports thereof, and relates to the technical field of bridge structures, the bridge supporting and restraining system comprises a plane sliding longitudinal support, a multidirectional support and lateral restraining supports, two main piers in the middle of a beam body adopt the lateral restraining supports which are symmetrically distributed, and a side pier on one side of the beam body adopts the multidirectional support. And a side pier on the other side of the beam body adopts a plane sliding longitudinal support. The lateral constraint support comprises an upper seat plate, a spherical crown, a middle assembly, a lower seat assembly and limiting adjusting assemblies, the upper portion of the middle assembly is inserted into a groove of the upper seat plate, the spherical crown is arranged in the middle assembly, the middle assembly is arranged in the lower seat assembly, and the two limiting adjusting assemblies are symmetrically arranged on the two sides of the lower seat assembly. The whole bridge is not provided with a longitudinal fixed support, the main pier is provided with a longitudinal elastic support to jointly form a constraint system, so that the beam body is contracted symmetrically, the temperature span can be reduced, the purpose of not arranging a track telescopic regulator is achieved, and the construction cost and the later maintenance cost are saved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge structures, and in particular to a bridge support and restraint system and a lateral restraint bearing thereof. Background Art

[0002] As a key component of the bridge structure, the bridge bearing not only bears the role of transferring the upper load to the bridge piers, adapting to factors such as live load, temperature change, concrete shrinkage and creep, but also ensures that the actual stress conditions of the upper and lower structures meet the design requirements. The conventional arrangement of the three-span continuous beam support is to set fixed and transverse supports on one main pier, longitudinal and multi-directional supports on the other main pier, and longitudinal and multi-directional supports on the outer side pier, which will result in a larger temperature span and larger expansion and contraction of the beam joint on one side.

[0003] In order to adapt to the deformation coordination of bridges and tracks, in general, when the temperature span of high-speed railway concrete beams is greater than 200m and the temperature span of steel beams is greater than 100m, rail expansion regulators need to be installed according to the requirements of track force. High-speed railways require track structures to have high smoothness and high stability. Due to the inherent structural unevenness of rail expansion regulators, if they are superimposed on curves, the manufacturing and laying processes will be more complicated, and the track geometry will also be difficult to maintain during operation. Summary of the invention

[0004] The object of the present invention is to provide a bridge support and restraint system and a lateral restraint bearing thereof to overcome the above-mentioned defects in the prior art.

[0005] A bridge support and restraint system includes a plane sliding longitudinal support, a multi-directional support and a lateral restraint support. The two main piers in the middle of the beam body adopt symmetrically distributed lateral restraint supports, the side piers on one side of the beam body adopt multi-directional supports, and the side piers on the other side of the beam body adopt a plane sliding longitudinal support.

[0006] A lateral restraint support applied to the restraint system, the lateral restraint support includes an upper seat plate, a ball crown, an intermediate component, a lower seat component and a limit adjustment component, the upper part of the intermediate component is inserted into the groove of the upper seat plate, the ball crown is arranged in the intermediate component, the intermediate component is arranged in the lower seat component, and the limit adjustment component is provided with two and is symmetrically arranged on both sides of the lower seat component.

[0007] Preferably, the intermediate component includes an intermediate plate, a side slide plate and an inclined slide plate. The intermediate plate is inserted into the groove of the upper seat plate. A spherical slide plate abutting against the ball crown is provided in the upper mounting groove at the top of the intermediate plate. The side slide plate is provided at the bottom of the intermediate plate and the slope of its lower end is 3‰. An inclined slide plate is provided in the lower mounting groove at the lower end of the side slide plate.

[0008] Preferably, a flat slide plate is provided on the top of the spherical crown, and the main body of the spherical crown is arranged in the upper mounting groove.

[0009] Preferably, the lower seat assembly includes a lower seat plate, a lateral stainless steel plate and a beveled stainless steel plate, the lower seat plate is provided with a raised rectangular limit ring, the top bevel of the lower seat plate is provided with a beveled stainless steel plate matching the inclination of the beveled slide plate, and lateral stainless steel plates are respectively provided on both sides of the lower seat plate.

[0010] Preferably, the limit adjustment assembly includes a limit plate, an adjustment plate and an adjustment bolt. The limit plate is arranged on the inner side of the lower seat plate. Several adjustment plates are provided and are located between the limit plate and the inner wall of the lower seat plate. The adjustment bolt passes through the lower seat plate, the U-shaped notch on the adjustment plate and the limit plate and locks the three through the adjustment nut.

[0011] The present invention has the following advantages:

[0012] 1. When the lateral restraint bearing is subjected to the vertical load of the beam, a lateral horizontal force will be generated on the inclined friction pair toward the mid-span, thereby generating lateral restraint on the beam, optimizing the load transmission path along the bridge on the long-span bridge. In addition, the part above the middle plate assembly of the lateral restraint bearing can meet the daily rotation requirements of the bridge. The rotation of the bridge does not affect the lower inclined sliding pair. The inclined sliding pair always maintains a certain slope, which can provide a stable lateral compression horizontal force for the beam and avoid the damage caused by the tensile strength of the bridge concrete.

[0013] 2. The symmetrical inclined support sliding structure on the two main piers in the middle of the support system of this application forms a V-shaped pendulum structure. Under the action of an earthquake, the bridge reciprocates up and down on the inclined sliding pair, converting the seismic energy into potential energy, reducing the earthquake effect. At the same time, during the reciprocating motion, the friction resistance of the inclined sliding pair dissipates the seismic energy and prolongs the natural vibration period of the structure, achieving the effect of seismic isolation. In addition, the lower seat plate is a square limiting structure on all sides, which cooperates with the middle plate assembly to realize the anti-falling beam function and avoid the risk of falling beams on the bridge.

[0014] 3. The support system of the bridge in this application is a support system without fixed piers. When the main span produces a certain displacement to one end, the upper limit adjustment device of the intermediate component and the lower seat plate component will contact and limit. The contact limit force is sufficient to overcome the friction resistance and lifting force of the main pier supports relative to the same bridge, causing the beam body to deform to the other side, thereby driving the adjacent main pier supports to slide, and realizing the beam body's autonomous free and symmetrical expansion and contraction deformation from the middle of the span to both sides. The temperature expansion zero point is locked in the middle of the main span, reducing the temperature span and beam end expansion and contraction displacement, reducing the scale of the beam end expansion and contraction device, and realizing no dynamic deformation of the beam end under high-speed driving conditions, ensuring driving smoothness and riding comfort.

[0015] 4. The entire bridge is not equipped with longitudinal fixed supports. The main piers are equipped with longitudinal elastic supports to form a constraint system, which makes the beam shrink symmetrically, reduces the temperature span, and achieves the purpose of not having to set up track expansion and contraction adjusters, saving project costs and subsequent maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the overall bridge support elevation layout and bridge support plan layout diagram of the present invention.

[0017] Figure 2 It is an internal cross-sectional view of the lateral restraint support of the present invention.

[0018] Figure 3 It is a longitudinal sectional view of the constraining support of the present invention.

[0019] Figure 4 It is a schematic diagram of the structure of the intermediate component of the present invention.

[0020] Figure 5 It is a structural schematic diagram of the lower seat assembly and the limit adjustment assembly of the present invention.

[0021] Figure 6 It is a structural schematic diagram of the limiting plate of the present invention.

[0022] Figure 7 It is a structural schematic diagram of the adjustment plate of the present invention.

[0023] Among them: 1. Upper seat plate; 11. Groove; 2. Middle component; 21. Middle plate; 22. Upper mounting groove; 23. Spherical slide plate; 24. Side slide plate; 25. Lower mounting groove; 26. Inclined slide plate; 3. Ball crown; 31. Plane slide plate; 4. Lower seat component; 41. Lower seat plate; 42. Inclined stainless steel plate; 43. Lateral stainless steel plate; 5. Limit adjustment component; 51. Limit plate; 52. Adjustment plate; 521. U-shaped notch; 53. Adjustment bolt; 54. Adjustment nut. DETAILED DESCRIPTION

[0024] The specific implementation modes of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention.

[0025] like Figure 1 As shown, the present invention provides a bridge support and restraint system, including plane sliding longitudinal supports, multi-directional supports and lateral restraint supports. The two main piers in the middle of the beam body adopt symmetrically distributed lateral restraint supports, the side piers on one side of the beam body adopt multi-directional supports, and the side piers on the other side of the beam body adopt plane sliding longitudinal supports.

[0026] like Figure 2-4As shown, the lateral restraint support includes an upper seat plate 1, a ball crown 3, an intermediate component 2, a lower seat component 4 and a limit adjustment component 5. The upper part of the intermediate component 2 is inserted into the groove 11 of the upper seat plate 1, the ball crown 3 is arranged in the intermediate component 2, and the intermediate component 2 is arranged in the lower seat component 4. A sliding gap is reserved between the intermediate component 2 and the lower seat component 4 along the bridge direction, and a limit adjustment component 5 is arranged between them to adjust the change of the reserved sliding gap caused by the shrinkage displacement caused by the shrinkage creep of the beam body, so as to ensure that the reserved gaps on both sides of the support along the bridge direction can meet the normal expansion and contraction displacement of the beam body;

[0027] The intermediate component 2 includes an intermediate plate 21, a side slide plate 24 and an inclined slide plate 26. The intermediate plate 21 is inserted into the groove 11 of the upper seat plate 1. The upper mounting groove 22 at the top of the intermediate plate 21 is provided with a spherical slide plate 23 that abuts against the ball crown 3. The top of the ball crown 3 is provided with a flat slide plate 31. The main body of the ball crown 3 is provided in the upper mounting groove 22. The side slide plate 24 is provided at the bottom of the intermediate plate 21 and the slope of its lower end is 3‰. The lower mounting groove 25 at the lower end of the side slide plate 24 is provided with an inclined slide plate 26, so as to ensure that the top surface of the upper seat plate 1 and the bottom surface of the lower seat plate 41 are arranged in parallel, which is convenient for positioning and installation of the support.

[0028] like Figure 5 As shown, the lower seat assembly 4 includes a lower seat plate 41, a lateral stainless steel plate 43 and an inclined stainless steel plate 42. The lower seat plate 41 is provided with a raised rectangular limit ring, which limits the lateral displacement of the middle plate assembly 2 in the cross bridge direction. The top inclined surface of the lower seat plate 41 is provided with an inclined stainless steel plate 42 that matches the inclination of the inclined slide plate 26, forming an inclined friction pair with the inclined slide plate, and lateral stainless steel plates 43 are respectively provided on both sides of the lower seat plate 41.

[0029] The limit adjustment assembly 5 includes a limit plate 51, an adjustment plate 52 and an adjustment bolt 53. Figure 6-7 As shown, the limit plate 51 is arranged on the inner side of the lower seat plate 41, and the adjusting plates 52 are provided with a plurality of plates and are located between the limit plate 51 and the inner wall of the lower seat plate 41. The adjusting bolt 53 passes through the lower seat plate 41, the U-shaped notch 521 on the adjusting plate 52 and the limit plate 51, and the three are locked by the adjusting nut 54. The limit adjustment is performed by increasing or decreasing the number of the adjusting plates 52, and the adjusting bolt 53 and the adjusting nut 54 are also convenient for disassembly and installation;

[0030] When the lateral restraint bearing is subjected to the vertical load of the beam, a lateral horizontal force will be generated on the inclined friction pair toward the mid-span, thereby generating lateral restraint on the beam, optimizing the load transmission path along the bridge on the long-span bridge. In addition, the part above the middle plate assembly of the lateral restraint bearing can meet the daily rotation requirements of the bridge. The rotation of the bridge does not affect the lower inclined sliding pair. The inclined sliding pair always maintains a certain slope, which can provide a stable lateral compression horizontal force for the beam and avoid the damage caused by the tensile strength of the bridge concrete.

[0031] The symmetrical inclined support sliding structure on the two main piers in the middle of the support system forms a V-shaped pendulum structure. Under the action of an earthquake, the bridge reciprocates up and down on the inclined sliding pair, converting the seismic energy into potential energy, reducing the earthquake effect. At the same time, during the reciprocating motion, the friction resistance of the inclined sliding pair dissipates the seismic energy and prolongs the natural vibration period of the structure, achieving the effect of seismic isolation. In addition, the lower seat plate is a square limiting structure on all sides, which cooperates with the middle plate assembly to realize the anti-falling beam function and avoid the risk of falling beams on the bridge.

[0032] The support system of the bridge is a support system without fixed piers. When the main span produces a certain displacement to one end, the upper limit adjustment device of the middle component and the lower seat plate component will contact and limit. The contact limit force is sufficient to overcome the friction resistance and lifting force of the main pier supports relative to the same bridge, causing the beam body to deform to the other side, thereby driving the adjacent main pier supports to slide, and realizing the free and symmetrical expansion and contraction deformation of the beam body from the middle of the span to both sides. The temperature expansion zero point is locked in the middle of the main span, reducing the temperature span and beam end expansion and contraction displacement, reducing the scale of the beam end expansion and contraction device, and realizing no dynamic deformation of the beam end under high-speed driving conditions, ensuring driving smoothness and riding comfort.

[0033] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the present invention, or the practical invention and technical solution are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A bridge support and restraint system, characterized in that: It includes plane sliding longitudinal supports, multi-directional supports and lateral restraint supports. The two main piers in the middle of the beam body adopt symmetrically distributed lateral restraint supports, the side piers on one side of the beam body adopt multi-directional supports, and the side piers on the other side of the beam body adopt plane sliding longitudinal supports.

2. A lateral restraint support used in the restraint system of claim 1, characterized in that: The lateral restraint support comprises an upper seat plate (1), a spherical crown (3), an intermediate component (2), a lower seat component (4) and a limit adjustment component (5); the upper portion of the intermediate component (2) is inserted into a groove (11) of the upper seat plate (1); the spherical crown (3) is arranged in the intermediate component (2); the intermediate component (2) is arranged in the lower seat component (4); and two limit adjustment components (5) are symmetrically arranged on both sides of the lower seat component (4).

3. A lateral restraint support according to claim 2, characterized in that: The intermediate component (2) comprises an intermediate plate (21), a side slide plate (24) and an inclined slide plate (26); the intermediate plate (21) is inserted into the groove (11) of the upper seat plate (1); a spherical slide plate (23) abutting against the spherical crown (3) is arranged in the upper mounting groove (22) at the top of the intermediate plate (21); the side slide plate (24) is arranged at the bottom of the intermediate plate (21) and has a slope of 3‰ at its lower end; and an inclined slide plate (26) is arranged in the lower mounting groove (25) at the lower end of the side slide plate (24).

4. A lateral restraint support according to claim 3, characterized in that: A flat slide plate (31) is provided on the top of the spherical crown (3), and the main body of the spherical crown (3) is arranged in the upper mounting groove (22).

5. A lateral restraint support according to claim 3, characterized in that: The lower seat assembly (4) comprises a lower seat plate (41), a lateral stainless steel plate (43) and an inclined stainless steel plate (42); the lower seat plate (41) is provided with a raised rectangular limiting ring; the top inclined surface of the lower seat plate (41) is provided with an inclined stainless steel plate (42) matching the inclination of the inclined slide plate (26); and lateral stainless steel plates (43) are respectively provided on both sides of the lower seat plate (41).

6. A lateral restraint support according to claim 5, characterized in that: The limit adjustment assembly (5) comprises a limit plate (51), an adjustment plate (52) and an adjustment bolt (53); the limit plate (51) is arranged on the inner side of the lower seat plate (41); the adjustment plate (52) is provided with a plurality of limit plates (51) and is located between the limit plate (51) and the inner wall of the lower seat plate (41); the adjustment bolt (53) passes through the lower seat plate (41), the U-shaped notch (521) on the adjustment plate (52) and the limit plate (51), and the three are locked by an adjustment nut (54).

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