CN210031471U

CN210031471U - Girder and pier rigid coupling structure of large-span bridge

Info

Publication number: CN210031471U
Application number: CN201920697653.8U
Authority: CN
Inventors: 黄福云; 张峰; 单玉麟; 周志明
Original assignee: Fuzhou University
Current assignee: Fuzhou University
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2020-02-07
Anticipated expiration: 2029-05-16

Abstract

The utility model relates to a girder and pier fixed connection structure of a large-span bridge, which comprises a prefabricated bridge girder and a prefabricated pier, wherein the pier is of a steel structure, and the girder and the pier are connected together through bolts; the welding of pier upper end has lower flange dish, the girder downside is provided with the last ring flange that is located lower flange dish upside, set up on the girder with the hole of last ring flange upper bolt hole one-to-one, the bolt is locked by the nut that is located lower flange dish downside after down passing hole, upper flange dish and lower flange dish in proper order from top to bottom. The utility model discloses the girder of large-span bridge passes through ring flange and bolted connection with pier and girder as a whole with pier and pier rigid coupling structure, and the wholeness of realization structure that can be fine and the transition of rigidity make girder and pier diseases such as stress concentration phenomenon or pier skew can not appear in the use, have strengthened the connection of girder and pier, have improved the bearing capacity of girder and pier, have strengthened the anti-seismic performance of bridge.

Description

Girder and pier rigid coupling structure of large-span bridge

Technical Field

The utility model relates to a girder and pier rigid coupling structure of large-span bridge belongs to fields such as bridge engineering.

Background

The bridge pier and the main beam of the common bridge are mainly connected through the support, most of the common bridge pier and the main beam are rubber supports, and the support connecting the main beam and the bridge pier is easy to damage due to vehicle load action, temperature action or earthquake action in the actual use process, so that the bridge pier is deviated, and other bridge substructure damage problems are caused, the safety of the bridge is influenced, and the service life of the bridge is shortened. Cause the main reason that bridge girder and pier junction support destroyed: one is that the contact surface between the support and the pier is uneven, and the contact surface is not compact due to the fact that the contact surface between the lower seat plate of the support and the pier is not compact due to various reasons in the use process of the bridge, so that the support is damaged; secondly, the support has installation defects during installation, and the support is easy to be hollow, so that the shear stress of the joint of rubber and a steel plate in the support is concentrated, and the over-limit sliding and the shearing damage even occur when the disease is developed violently; thirdly, the support is easy to age and crack after long-term use, and diseases such as abnormal deformation, blocked sliding, cracking and the like are generated. Aiming at the disease phenomena such as support damage and the like, corresponding effective measures are adopted to solve the problems.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a girder and pier fastening structure for a large-span bridge, which can improve the connection performance between the girder and the pier and ensure the safety of the bridge.

The utility model discloses a following scheme realizes: a girder and pier fixed connection structure of a large-span bridge comprises a prefabricated bridge girder and piers, wherein the piers are of steel structures, and the girder and the piers are connected together through bolts; the welding of pier upper end has lower flange dish, the girder downside is provided with the last ring flange that is located lower flange dish upside, set up on the girder with the hole of last ring flange upper bolt hole one-to-one, the bolt is locked by the nut that is located lower flange dish downside after down passing hole, upper flange dish and lower flange dish in proper order from top to bottom.

Furthermore, a flange pad is clamped between the upper flange plate and the lower flange plate.

Furthermore, the main beam is formed by pouring ultrahigh-performance concrete, and the upper flange plate is fixedly connected in the ultrahigh-performance concrete of the main beam.

Compared with the prior art, the utility model discloses following beneficial effect has: the girder and the pier fixed connection structure of the large-span bridge integrates the pier and the girder through the flange plate and the bolt, thereby well realizing the integrity and rigidity transition of the structure, preventing the girder and the pier from generating stress concentration or pier deviation and other diseases in the use process, strengthening the connection between the girder and the pier, improving the bearing capacity of the girder and the pier and enhancing the anti-seismic performance of the bridge; the flange joint bonding strength is high, and the leakproofness is good and convenient to detach, and processing is convenient, firm, stability is good, and the engineering practicality is very high to simple structure, the cost is low moreover, and the commonality is high, construction convenience, can improve the support and often destroy the problem that needs the maintenance simultaneously, can improve bridge security and anti-seismic performance and can reduce the maintenance cost again, and is economical reasonable.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to specific embodiments and related drawings.

Drawings

FIG. 1 is a schematic view of the construction of a main beam of the present invention;

FIG. 2 is a schematic view of the pier structure of the present invention;

FIG. 3 is a schematic view of the flange plate fitting in the embodiment of the present invention;

the reference numbers in the figures illustrate: 1-main beam, 2-bolt, 3-bridge pier, 4-lower flange plate, 5-flange pad and 6-upper flange plate.

Detailed Description

As shown in fig. 1 to 3, the girder and pier fixedly connecting structure of the large-span bridge comprises a prefabricated bridge girder 1 and a prefabricated pier 3, wherein the pier is a pier which is not connected with a roadbed in the middle of the large-span bridge, the pier 3 is of a steel structure, namely the pier is a prefabricated steel pier, the bottom of the pier is connected with a pile foundation, the pile foundation is deep into a foundation, the pile foundation is rigidly connected with the pier, and the pile foundation is a flexible pile or a small-diameter pile; the main beam 1 and the bridge pier 3 are connected together through a bolt 2; the upper end of the pier 3 is welded with a lower flange plate 4, the lower side surface of the main beam 1 is provided with an upper flange plate 6 positioned on the upper side of the lower flange plate 4, bolt holes on the upper flange plate and the lower flange plate are in one-to-one correspondence, holes in one-to-one correspondence with the bolt holes on the upper flange plate 6 are formed in the main beam 1, the holes penetrate through the upper side surface and the lower side surface of the main beam, and bolts sequentially penetrate through the holes, the upper flange plate 6 and the lower flange plate 4 from top to bottom and are locked by nuts positioned on the lower; the bridge pier and the main beam are connected into a whole through a flange plate and a bolt; the integrity and rigidity transition of the structure can be well realized, so that the stress concentration phenomenon or pier deviation and other diseases can not occur in the use process of the girder and the piers, the connection between the girder and the piers is enhanced, the bearing capacity of the girder and the piers is improved, and the seismic performance of the bridge is enhanced; the flange joint bonding strength is high, and the leakproofness is good and convenient to detach, and processing is convenient, firm, stability is good, and the engineering practicality is very high to the commonality is high, construction convenience, can improve the support and often destroy the problem that needs the maintenance simultaneously, can improve bridge security and shock resistance can reduce the maintenance cost again, and is economical reasonable.

In this embodiment, a flange gasket 5 is sandwiched between the upper flange 6 and the lower flange 4, and the two flanges are sealed together by the flange gasket to realize integral connection.

In the embodiment, the main beam 1 is formed by pouring ultrahigh-performance concrete, the upper flange 6 is fixedly connected in the ultrahigh-performance concrete of the main beam, and the upper flange and the ultrahigh-performance concrete are poured together when the main beam is prefabricated, so that the upper flange and the main beam form an integral structure, and in addition, in order to increase the strength, the upper flange can be welded with a reinforcement cage in the main beam; the main beam is made of ultra-high performance concrete, the rigidity is lower, the deformation of the main beam can be absorbed under the action of temperature and vehicle load, and the energy consumption effect can be achieved under the action of earthquake.

The utility model discloses the girder of large-span bridge and pier rigid coupling structure can accomplish to eliminate bridge beam mound junction disease problem from structure and mechanics mechanism, guarantee the security that the bridge used. The basic principle of the construction measure is to strengthen the connection between the main beam and the bridge pier, so that the main beam and the bridge pier are not easy to be damaged like the connection between the supports. The UHPC girder can adapt to the deformation of the bridge to a great extent to reduce the generation of cracks. The flange plate is used for strengthening the connection between the main beam and the bridge pier, improving the bearing capacity of the main beam and the bridge pier and enhancing the anti-seismic performance of the bridge. When the bridge is in the operation stage, the bridge is influenced by external factors to generate horizontal displacement and corners, the device can well transfer the deformation of the superstructure downwards by improving the connection performance of the girder and the bridge pier, and meanwhile, the girder made of the UHPC material can absorb partial deformation, so that the bridge cannot be damaged due to overlarge deformation. Therefore, the construction measure is different from the traditional support connection, on one hand, the flange plate and the bolts are used for realizing good rigidity transition of the connection between the pier and the main beam, and the phenomenon of stress concentration is not easy to occur so that the flange connection part is damaged; on the other hand, the bearing support does not have installation defects like a support, so that the bearing support does not cause diseases such as void, pier offset and the like. The flange connection has high bonding strength, good tightness, convenient disassembly, convenient and firm processing, good stability and high engineering practicability, thereby having more important engineering value and economic benefit.

The utility model discloses girder of large-span bridge and the work progress of pier rigid coupling structure:

(1) prefabricating a pier and a main beam, wherein the pier is formed by pouring steel, a lower flange plate is welded at the upper end of the pier, the main beam is formed by pouring ultrahigh-performance concrete, an upper flange plate is fixedly connected to the lower side of the main beam, and holes which correspond to bolt holes in the upper flange plate one by one are reserved in the main beam;

(2) constructing a foundation and a pile foundation on a construction site, wherein the pile foundation is deep into the foundation;

(3) the bridge pier is installed on the pile foundation, then the main beam is installed on the bridge pier, and the bolts sequentially penetrate through the holes, the upper flange plate and the lower flange plate from top to bottom and are locked by nuts located on the lower side of the lower flange plate.

Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.

The utility model discloses if disclose or related to mutual fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated.

The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims

1. The utility model provides a girder and pier rigid coupling structure of large-span bridge which characterized in that: the bridge comprises a prefabricated bridge girder and a bridge pier, wherein the bridge pier is of a steel structure, and the girder and the bridge pier are connected together through bolts; the welding of pier upper end has lower flange dish, the girder downside is provided with the last ring flange that is located lower flange dish upside, set up on the girder with the hole of last ring flange upper bolt hole one-to-one, the bolt is locked by the nut that is located lower flange dish downside after down passing hole, upper flange dish and lower flange dish in proper order from top to bottom.

2. The girder and pier fixed connection structure of a large-span bridge according to claim 1, characterized in that: and a flange pad is clamped between the upper flange plate and the lower flange plate.

3. The girder and pier fixed connection structure of a large-span bridge according to claim 1, characterized in that: the main beam is formed by pouring ultrahigh-performance concrete, and the upper flange plate is fixedly connected in the ultrahigh-performance concrete of the main beam.