CN210561655U

CN210561655U - Four-line large-span railway bridge supporting system

Info

Publication number: CN210561655U
Application number: CN201921292800.XU
Authority: CN
Inventors: 刘海亮; 宁伯伟; 石建华; 李世文; 张巨生; 范川; 兰鹏
Original assignee: China Railway Major Bridge Reconnaissance and Design Institute Co Ltd; Chengdu Xinzhu Road and Bridge Machinery Co Ltd
Current assignee: China Railway Major Bridge Reconnaissance and Design Institute Co Ltd; Chengdu Xinzhu Road and Bridge Machinery Co Ltd
Priority date: 2019-08-09
Filing date: 2019-08-09
Publication date: 2020-05-19
Anticipated expiration: 2029-08-09

Abstract

The utility model discloses a four-wire large-span railway bridge supports system, including the bridge body, pier and bridge tower, the pier has a plurality ofly and distributes the bridge body below between the corresponding tip of bridge tower and bridge body, each set up the multidirectional movable support that has shock isolation device between pier top and the bridge body bottom respectively, establish the horizontal stop device who has the fusing mechanism between bridge body both ends bottom and the pier respectively, set up multidirectional movable anti-wind support between bridge tower and the bridge body side. The utility model discloses vertical bearing, the level when can satisfying bridge normal use well bears, vertical corner and horizontal corner function, the shock attenuation power consumption of bridge and prevent the roof beam function that falls when also can realizing the earthquake.

Description

Four-line large-span railway bridge supporting system

Technical Field

The utility model relates to a four-wire large-span railroad bridge supports system belongs to railroad bridge technical field.

Background

The large-span bridge girder supporting system is mainly provided with vertical supports at a bridge tower and a beam end, and the vertical supports have vertical bearing and horizontal bearing limiting functions. And a horizontal transverse wind-resistant support is arranged at the bridge tower, and a transverse limiting anti-seismic stop block is arranged at the beam end, so that the wind-resistant and anti-seismic functions of a bridge system are realized.

However, for a four-line large-span bridge, the bridge span is long, the bridge surface is wide, and under the action of external load, the bridge body can generate horizontal torsion, and the beam end can generate vertical displacement and a horizontal corner. The supporting system of the bridge is suitable for the vertical bearing, the horizontal bearing and the vertical corner of the bridge, and is also suitable for the horizontal corner of the bridge.

The conventional support system can only meet the requirements of vertical bearing, horizontal bearing and vertical corner of the bridge and cannot adapt to the horizontal corner of the bridge. And the bridge still should possess in the earthquake condition and possess certain shock attenuation and isolation function, and viscous damper is adopted to the vertical bridge to general. The conventional seismic isolation and reduction means of the transverse bridge is to change vertical supports at all piers into friction pendulum supports, but the friction pendulum supports can generate an increased amount when in normal temperature displacement, and are not beneficial to the stress of a bridge structure system. Therefore, a supporting mode is needed, the requirements of vertical bearing, horizontal bearing, vertical corners and horizontal corners of the bridge can be met, and the seismic isolation and reduction function is achieved during an earthquake.

SUMMERY OF THE UTILITY MODEL

The invention of the utility model aims to: aiming at the requirements, a four-line large-span railway bridge supporting system is provided.

The utility model discloses a technical scheme be like:

the utility model provides a four-wire large-span railway bridge support system, includes the roof beam body, pier and bridge tower, the pier has a plurality ofly and distributes in the bridge tower and the corresponding roof beam body below between the tip of the roof beam body, each set up the multidirectional movable support that has shock isolation device between pier top and the roof beam body bottom respectively, set up the horizontal stop device who has the fusing mechanism between roof beam body both ends bottom and the pier respectively, set up multidirectional movable anti-wind support between bridge tower and the roof beam body side.

Since the technical scheme is used, the utility model discloses vertical when can satisfying bridge normal use well bears, the level bears, vertical corner and horizontal corner function, the shock attenuation power consumption of bridge and prevent the roof beam function that falls when also can realizing the earthquake.

Preferably, a longitudinal viscous damper is arranged between the pier at the bridge tower and the bottom of the girder. The longitudinal viscous damper can play a role in shock absorption and energy consumption in an earthquake.

Preferably, the multidirectional movable support with the shock isolation device sequentially comprises an upper plate I, a spherical crown lining plate, a limiting device, a lower plate I and a curved plate from top to bottom, a planar sliding plate is arranged between the bottom surface of the upper plate I and the top plane of the spherical crown lining plate, a transverse bridge limiting structure is arranged on the bottom surface of the upper plate I to limit the transverse bridge of the spherical crown lining plate to two sides, an upper spherical sliding plate is arranged between the spherical surface of the bottom of the spherical crown lining plate and the concave surface of the top of the curved plate, a lower spherical sliding plate is arranged between the curved surface of the bottom of the curved plate and the concave surface of the top of the lower plate I, and a longitudinal bridge limiting structure is arranged on the lower plate I to limit the. The multidirectional movable support with the shock isolation device is a sliding surface in a curved surface form in the transverse bridge direction, is a plane in the longitudinal bridge direction, can simultaneously realize displacement in the longitudinal bridge direction and the transverse bridge direction, has a certain damping function in the transverse direction, is transversely provided with a limiting device for preventing a beam from falling, and realizes shock absorption and energy consumption. Preferably, the lower spherical surface sliding plate is made of a material different from that of the planar sliding plate and that of the upper spherical surface sliding plate, and the friction coefficient between the lower spherical surface sliding plate and the first lower plate is greater than the friction coefficient between the planar sliding plate and the first upper plate and the friction coefficient between the upper spherical surface sliding plate and the spherical surface at the bottom of the spherical cap lining plate.

Preferably, the transverse limiting device with the fusing mechanism comprises a second upper plate, a shearing resistant block, a shearing resistant pin, a rotating sleeve and a second lower plate, wherein the shearing resistant block is positioned at the bottom of the upper plate and vertically penetrates through the second upper plate and the second upper plate to be fixed into a whole through the shearing resistant pin, the lower part of the shearing resistant block is inserted into the rotating sleeve in a nested mode, a contact surface between the shearing resistant block and the rotating sleeve is a spherical surface to form a spherical surface rotating pair, the rotating sleeve is arranged on the second lower plate, and the longitudinal two side surfaces of the rotating sleeve are in contact with the inner side surfaces of the transverse limiting structures. The transverse limiting device with the fusing mechanism is arranged between the pier and the beam at the beam end, only transverse rigidity is provided, longitudinal displacement can be realized, and the transverse limiting device is fused during earthquake and does not provide transverse rigidity any more. Preferably, the shear pin is provided with a shearing groove at the contact surface position of the shear block and the bottom surface of the upper plate.

Drawings

Fig. 1 is a plan view of the present invention.

Fig. 2 is a cross-sectional view (at the bridge tower) of the present invention.

Fig. 3 is a cross-sectional view (bridge pier) of the present invention.

Fig. 4 is a sectional view of a multidirectional movable support with a vibration isolating device according to the present invention.

Fig. 5 is a cross-sectional view of a lateral restraining device having a fuse mechanism according to the present invention.

The labels in the figure are: the wind-resistant and anti-shear device comprises a multidirectional movable support 1 with a shock isolation device, a transverse limiting device 2 with a fusing mechanism, a multidirectional movable wind-resistant support 3, a longitudinal viscous damper 4, an upper plate I11, a spherical cap lining plate 12, a limiting device 13, a lower plate I14, a curved plate 15, an upper plate II 21, a shear block 22, a shear pin 23, a rotating sleeve 24 and a lower plate II 25.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

Example (b):

as shown in figure 1, a four-line large-span railroad bridge support system comprises a bridge body, piers and a bridge tower, wherein the piers are arranged below the bridge body and distributed between the bridge tower and the corresponding end part of the bridge body, multidirectional movable supports 1 with shock insulation devices are respectively arranged between the tops of the piers and the bottom of the bridge body, transverse limiting devices 2 with fusing mechanisms are respectively arranged between the bottoms of two ends of the bridge body and the piers, and multidirectional movable wind-resistant supports 3 are arranged between the bridge tower and the side surface of the bridge body.

And a longitudinal viscous damper 4 is arranged between the pier at the bridge tower and the bottom of the beam body.

Multidirectional movable support 1 from the top down includes upper plate 11, spherical crown welt 12, stop device 13, hypoplastron 14 and curved plate 15 in proper order with seismic isolation device, set up the plane slide between upper plate 11 bottom surface and the 12 top planes of spherical crown welt and set up the cross bridge through upper plate 1 bottom surface and carry on spacingly to the lateral bridge to stop structure to spherical crown welt 12 cross bridge to both sides, set up the sphere slide in the sphere between 12 bottom sphere of spherical crown welt and the 15 top concave surfaces of curved plate, set up down the sphere slide between 15 bottom curved surfaces of curved plate and the 14 top concave surfaces of hypoplastron, set up the longitudinal bridge on hypoplastron 14 and carry on spacingly to both sides to 15 longitudinal bridge of curved plate to stop structure. The material of the lower spherical surface sliding plate is different from that of the plane sliding plate and the upper spherical surface sliding plate, and the friction coefficient between the lower spherical surface sliding plate and the lower plate I14 is larger than that between the plane sliding plate and the upper plate I11 and that between the upper spherical surface sliding plate and the spherical surface at the bottom of the spherical crown lining plate 12.

The transverse limiting device 2 with the fusing mechanism comprises an upper plate II 21, a shearing resistant block 22, a shearing resistant pin 23, a rotating sleeve 24 and a lower plate II 25, wherein the shearing resistant block 22 is positioned at the bottom of the upper plate 21 and vertically penetrates through the shearing resistant pin 23 to be fixed into a whole, the lower part of the shearing resistant block 22 is inserted into the rotating sleeve 24 in a nested mode, a contact surface between the shearing resistant block and the rotating sleeve 24 is a spherical surface to form a spherical surface rotating pair, the rotating sleeve 24 is arranged on the lower plate II 25, and the longitudinal two side surfaces of the rotating sleeve 24 are in contact with the inner side surfaces of transverse limiting structures on the transverse two sides of the lower plate II. And the shear pin 23 is provided with a shearing groove at the contact surface position of the shear block 22 and the bottom surface of the upper plate 21.

Under the normal working condition of the bridge, the multidirectional movable support 1 with the shock insulation device at each pier can perform temperature displacement along the transverse direction and the longitudinal direction to adapt to the temperature deformation of the bridge. Because the multidirectional movable support 1 with the shock insulation device has no horizontal limit, the vertical and horizontal turning angles of the bridge can be met. The multidirectional movable support 1 with the shock isolation device is only provided with a transverse sliding surface which is a curved surface, and because the transverse displacement of the bridge under the normal condition is small, the generated transverse lifting is very small, and the influence on the bridge structure is avoided. The horizontal spacing of bridge braced system is realized by the horizontal stop device 2 that the beam-ends has the fusing mechanism, and this horizontal stop device 2 that has the fusing mechanism still can realize indulging the slippage of bridge to, only provides the horizontal ascending rigidity of bridge, and is not spacing to vertically, and when the beam-ends took place the horizontal rotation, this stop device can also adapt to the vertical and level of bridge and rotate to. The multi-directional movable wind-resistant support 3 (also called a wind-resistant support) only bears the horizontal wind load and does not limit the vertical direction and the longitudinal direction of the bridge. The whole supporting system can meet the requirements of the normal use function of the bridge.

When earthquake occurs, the transverse limiting device 2 with the fusing mechanism is fused, the beam end is not limited transversely any more, and the beam body can move longitudinally and transversely. When the beam body longitudinally displaces, the longitudinal viscous damper 4 performs longitudinal damping energy consumption, and when a certain displacement is reached, the longitudinal viscous damper 4 is locked to prevent the beam falling caused by the over-limit of the longitudinal displacement of the bridge. The multidirectional movable support 1 with the shock insulation device is only transversely a curved surface, and the beam body swings along the transverse direction during earthquake, so that the transverse vibration reduction and energy consumption are realized. The multidirectional movable support 1 with the shock isolation device is provided with the transverse limit stop block, so that the beam falling caused by the over-limit of the transverse displacement of the bridge is prevented. The multidirectional movable support 1 with the shock isolation device further has a reset function, and after an earthquake is finished, the beam body can transversely realize automatic reset.

Claims

1. The utility model provides a four-wire large-span railway bridge support system, includes the roof beam body, pier and bridge tower, the pier has a plurality ofly and distributes below the roof beam body between the corresponding tip of bridge tower and roof beam body, its characterized in that: and a multidirectional movable support (1) with a shock isolation device is arranged between the top of each pier and the bottom of the beam body, transverse limiting devices (2) with a fusing mechanism are arranged between the bottoms of two ends of the beam body and the piers respectively, and a multidirectional movable wind-resistant support (3) is arranged between the bridge tower and the side face of the beam body.

2. The four-line large-span railroad bridge support system of claim 1, wherein: and a longitudinal viscous damper (4) is arranged between the pier at the bridge tower and the bottom of the beam body.

3. The support system for a four-line large-span railroad bridge according to claim 1 or 2, wherein: multidirectional movable support (1) from the top down includes upper plate (11), spherical crown welt (12), stop device (13), hypoplastron (14) and curved plate (15) in proper order with shock isolation device, set up the plane slide between upper plate (11) bottom surface and spherical crown welt (12) top plane and set up the cross bridge through upper plate (11) bottom surface and spacing to spherical crown welt (12) cross bridge to both sides to limit structure, set up the sphere slide between spherical crown welt (12) bottom sphere and curved plate (15) top concave surface, set up down the sphere slide between curved plate (15) bottom curved surface and hypoplastron (14) top concave surface, set up the longitudinal bridge on hypoplastron (14) and spacing to curved plate (15) longitudinal bridge to both sides.

4. The four-wire large-span railroad bridge support system of claim 3, wherein: the material of the lower spherical surface sliding plate of the multidirectional movable support (1) with the shock insulation device is different from that of the planar sliding plate and the upper spherical surface sliding plate, and the friction coefficient between the lower spherical surface sliding plate and the lower plate I (14) is larger than that between the planar sliding plate and the upper plate I (11) and that between the upper spherical surface sliding plate and the spherical surface at the bottom of the spherical crown lining plate (12).

5. The support system for a four-line large-span railroad bridge according to claim 1 or 2, wherein: the transverse limiting device (2) with the fusing mechanism comprises a second upper plate (21), a shearing resistant block (22), a shearing resistant pin (23), a rotating sleeve (24) and a second lower plate (25), wherein the shearing resistant block (22) is positioned at the bottom of the second upper plate (21) and vertically penetrates through the shearing resistant pin (23) to be fixed into a whole, the lower part of the shearing resistant block (22) is inserted into the rotating sleeve (24) in a nested mode, a contact surface between the shearing resistant block and the rotating sleeve is a spherical surface to form a spherical surface rotating pair, the rotating sleeve (24) is arranged on the second lower plate (25), and the longitudinal two side surfaces of the rotating sleeve (24) are in contact with the inner side surfaces of the transverse limiting structures on the transverse two sides of the second lower plate (25.

6. The support system for a four-line large-span railroad bridge according to claim 5, wherein: and the shear pin (23) is provided with a shear groove at the contact surface position of the shear block (22) and the bottom surface of the upper plate II (21).