CN215482230U

CN215482230U - Combined bridge deck and main beam connecting structure of beam bridge

Info

Publication number: CN215482230U
Application number: CN202121885820.5U
Authority: CN
Inventors: 许泽宁; 徐宏光; 吴林松; 李剑鸾; 杨大海; 陈修林; 孙磊; 沈筠; 慈伟主; 杨凯; 殷律
Original assignee: Anhui Transport Consulting and Design Institute Co Ltd; Anhui Transportation Holding Group Co Ltd
Current assignee: Anhui Transport Consulting and Design Institute Co Ltd; Anhui Transportation Holding Group Co Ltd
Priority date: 2021-08-12
Filing date: 2021-08-12
Publication date: 2022-01-11
Anticipated expiration: 2031-08-12

Abstract

The utility model discloses a connecting structure of a bridge deck and a main beam of a combined beam bridge, wherein a shear connecting piece is arranged between the bridge deck and the main beam, and the connecting structure is characterized in that: a groove is arranged on the upper surface of the upper edge plate of the main beam; the lower half section of the shear connecting piece is pre-buried at the position of the groove in the main beam as an embedded part, and the upper half section of the shear connecting piece protrudes in the groove; the bridge deck is a reinforced concrete member, and through holes of the bridge deck are distributed in the bridge deck at the same positions as the grooves in the main beam, so that the shear connectors protrude into the through holes of the bridge deck; the main beam grooves and the bridge deck through holes are aligned one by one to form an upper and lower integrated grouting cavity, and concrete is post-poured into the grouting cavity to form an integrated connecting structure taking the shear connectors as reinforcing ribs.

Description

Combined bridge deck and main beam connecting structure of beam bridge

Technical Field

The utility model relates to the technical field of bridge engineering, in particular to a connecting structure of a bridge deck and a main beam of a combined beam bridge.

Background

In recent years, the bridge structure type has been shifted to a complicated and diversified form along with the development of high-performance concrete materials and steel structures. The combined beam bridge is a structure which realizes connection between a main beam and a bridge deck through a shear connector. The combined beam bridge has the characteristics of exerting different stress behaviors of the main beam and the bridge deck, so that different materials can be combined and are respectively used in the main beam and the bridge deck of the combined beam, the best use is achieved, and the combined beam bridge has higher economic and technical advantages. Therefore, the key point for ensuring the main beam and the bridge deck to work under the common stress is to ensure the reliable non-slip connection of the main beam and the bridge deck. The connection between the main beam and the bridge deck plate needs to bear the longitudinal bridge direction and the transverse bridge direction shearing force between the concrete slab and the main beam. When the distance between adjacent main beams is large and the transverse connection between the main beams is weak, the connection between the main beams and the bridge deck bears large vertical drawing force while bearing large plane shearing force, and measures are needed to resist the lifting between the main beams and the bridge deck at the moment.

The combined beam bridge in the prior art has two connection structures: one is that the shear connectors are fully distributed on the upper surface of the upper flange of the main beam, and then the connection between the bridge deck and the main beam is realized through cast-in-place concrete; the other type is that the shear connectors are embedded in a cluster mode at intervals on the upper surface of the upper flange of the main beam, through holes are reserved at corresponding positions of the prefabricated bridge deck, and then concrete is poured into the through holes to achieve connection between the main beam and the bridge deck. The first mode has the problems of large in-situ pouring workload and long construction period; compared with the first mode, the second mode has the advantages that the stress performance of the cluster type shear connector is more complex, and the bearing capacity and the shear rigidity of the shear connector are greatly influenced by the grouting quality and strength of the shear groove. The problems shared by the prior art are as follows: the contact interface of post-cast concrete and the prefabricated girder cannot be well bonded, interface separation and slippage are easy to occur in operation, and the shearing resistance and the pulling resistance of the interface are borne only by the shear connectors, so that the arrangement quantity of the shear connectors is large, the site concrete pouring working area is large, and certain quality control problems and safety problems are brought to the site.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, provides a connecting structure of a combined beam bridge deck and a main beam, ensures that the post-cast concrete and the prefabricated main beam and each contact interface between the deck plates are well bonded, ensures that the main beam and the deck plates share interface shearing force and vertical drawing force together through the post-cast concrete and a shearing force connecting piece, and increases the reliability and durability of the integral work of the deck plates and the main beam of the combined beam bridge.

The utility model adopts the following technical scheme for solving the technical problems:

the utility model relates to a bridge deck and main beam connecting structure of a combined beam bridge, which is characterized in that a shear connecting piece is arranged between the bridge deck and the main beam;

the main beam is a concrete beam with an I-shaped section, and a groove is formed in the upper surface of an upper edge plate of the main beam; the lower half section of the shear connecting piece is pre-buried at the position of the groove in the main beam as an embedded part, and the upper half section of the shear connecting piece protrudes in the groove; the bridge deck is a reinforced concrete member, and in the bridge deck, through holes of the bridge deck are distributed at the same positions as the grooves in the main beam, so that the shear connectors protrude into the through holes of the bridge deck;

the connection structure of the bridge deck and the main beam is characterized in that the grooves in the main beam and the through holes of the bridge deck are aligned one by one to form a vertical integrated grouting cavity, and concrete is post-poured in the grouting cavity to enable the bridge deck and the main beam to form an integrated post-pouring component through the through holes of the bridge deck, the grooves and the shear connectors so as to realize connection.

The connection structure of the bridge deck and the main beam of the combined beam bridge is also characterized in that: the groove arranged in the main beam is in an inverted trapezoid table shape, and the area of the upper opening of the groove is smaller than that of the bottom opening; the bottom opening of the bridge deck through hole is matched with the upper opening of the groove in size and shape.

The connection structure of the bridge deck and the main beam of the combined beam bridge is also characterized in that: the top surface of the shear connector is not higher than the upper surface of the bridge deck.

The connection structure of the bridge deck and the main beam of the combined beam bridge is also characterized in that: the main beam is made of high-performance concrete, so that the standard value of the axial tensile strength of the concrete beam is not lower than 6MPa, and the standard value of the axial compressive strength of the concrete beam is not lower than 80 MPa.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model is provided with a groove at the position of the shear connector on the upper surface of the main beam, so that the groove and the bridge deck through hole form a grouting cavity together, and later-poured concrete forms an integrated connection structure in the grouting cavity by taking the shear connector as a reinforcing rib; therefore, the main beam and the bridge deck share the interface shearing force and the vertical drawing force through the post-cast concrete and the shear connecting piece, and the reliability and the durability of the integral work of the bridge deck and the main beam of the combined beam bridge are greatly enhanced;

2. compared with the prior art, the utility model can effectively reduce the arrangement number of the shear connectors and reduce the on-site concrete pouring area and workload;

3. according to the utility model, the main beam can be made of high-performance concrete, and the bridge deck is kept to be made of common concrete, so that the combination can greatly reduce the cost while ensuring the performance.

Drawings

FIG. 1 is a plan view of a connection structure of a bridge deck and a main beam of the combined bridge of the present invention;

FIG. 2 is an elevation view of the connection structure of the deck plate and the main beam of the combined bridge of the present invention;

FIG. 3 is a structural diagram of a pre-embedded shear connector in a connection structure of a bridge deck and a main beam of the combined bridge of the utility model;

FIG. 4 is a structural view of a groove of an upper edge plate of a main beam in the connection structure of the bridge deck and the main beam of the combined bridge of the utility model;

reference numbers in the figures: 1 bridge deck, 1a bridge deck through hole, 2 main beams, 2a grooves and 3 shear connectors.

Detailed Description

Referring to fig. 1 and 2, the connection structure of the bridge deck and the main beam of the combined beam bridge in the embodiment is that a shear connector 3 is arranged between the bridge deck 1 and the main beam 2; the main beam 2 is a concrete beam with an I-shaped section, and a groove 2a is arranged on the upper surface of an upper edge plate of the main beam 2; the lower half section of the shear connecting piece 3 is pre-buried at the position of the groove 2a in the main beam 2 as an embedded part, and the upper half section of the shear connecting piece 3 protrudes in the groove 2 a; the bridge deck 1 is a reinforced concrete member, and in the bridge deck 1, through holes 1a of each bridge deck are distributed at the same positions as the grooves in the main beam 2, so that the shear connectors 3 protrude into the through holes 1a of the bridge decks; the connection structure of the bridge deck 1 and the main beam 2 is characterized in that the grooves 2a in the main beam and the through holes 1a of the bridge deck are aligned one by one to form a vertical integrated grouting cavity, and concrete is post-poured in the grouting cavity to enable the bridge deck 1 and the main beam 2 to form an integrated post-pouring component through the through holes 1a of the bridge deck, the grooves 2a and the shear connectors 3 to realize connection.

In this embodiment, as shown in fig. 2, 3, and 4, the groove 2a provided in the main beam 2 is in the shape of an inverted trapezoidal platform, and the area of the upper opening of the groove 2a is smaller than the area of the bottom opening; the bottom opening of the bridge deck through hole 1a is matched with the upper opening of the groove 2a in size and shape; the top surface of the shear connector 3 is not higher than the upper surface of the bridge deck 1; the main beam 2 is made of high-performance concrete, so that the standard value of the axial tensile strength of the concrete beam is not lower than 6MPa, and the standard value of the axial compressive strength of the concrete beam is not lower than 80 MPa.

In specific implementation, the corresponding measures also include:

the bridge deck 1 is of a reinforced concrete structure, can adopt common concrete with the strength grade of C40 and above, and can also adopt a high-performance concrete structure with the axial tensile strength of not less than 60MPa and the axial compressive strength of not less than 80MPa, and the bridge deck through hole 1a is a prefabricated through hole; the groove 2a in the main beam 2 is a prefabricated groove, and the inverted trapezoid table shape of the groove 2a enables the groove to form a mortise and tenon structure, so that the horizontal and horizontal displacement resistance and the vertical pulling resistance between the two groups of combined parts are increased.

According to the span of the bridge, the main beam 2 can be prefabricated integrally or assembled on site by sections.

The shear connecting piece 3 is embedded in a groove of the main beam when the main beam is prefabricated, and the protruding combination length is kept; the shear connector 3 can adopt a steel bar, a shear nail or a steel section member.

When the bridge deck of the combined beam bridge is combined with the main beam, the through hole 1a of the bridge deck is aligned with the groove on the upper edge of the main beam, and the shear connector extends into the through hole 1a of the bridge deck; and (3) post-pouring concrete grouting material, so that the bridge deck and the main beam form an integrated post-pouring member together through the bridge deck through hole, the upper edge groove of the main beam and the shear connector to realize connection, and the shear resistance and the vertical tensile resistance of the interface between the combined beam bridge and the bridge deck are realized through the integrated post-pouring member.

Claims

1. The utility model provides a modular beam bridge decking and girder connection structure, characterized by: a shear connector (3) is arranged between a bridge deck (1) and a main beam (2);

the main beam (2) is a concrete beam with an I-shaped section, and a groove (2a) is formed in the upper surface of an upper edge plate of the main beam (2); the lower half section of the shear connecting piece (3) is pre-buried at the position of a groove (2a) in the main beam (2) as an embedded part, and the upper half section of the shear connecting piece (3) protrudes and extends in the groove (2 a); the bridge deck (1) is a reinforced concrete member, and in the bridge deck (1), bridge deck through holes (1a) are distributed at the same positions as the grooves in the main beam (2), so that the shear connectors (3) protrude into the bridge deck through holes (1 a);

the connection structure of the bridge deck (1) and the main beam (2) is characterized in that grooves (2a) in the main beam (2) and bridge deck through holes (1a) are aligned one by one to form a vertical integrated grouting cavity, and concrete is poured in the grouting cavity in a post mode to enable the bridge deck (1) and the main beam (2) to form an integrated post-pouring component through the bridge deck through holes (1a), the grooves (2a) and the shear connectors (3) to achieve connection.

2. The structure for connecting a bridge deck and a main beam of a combined type beam bridge according to claim 1, which is characterized in that: the groove (2a) arranged in the main beam (2) is in an inverted trapezoid table shape, and the area of the upper opening of the groove (2a) is smaller than that of the bottom opening; the bottom opening of the bridge deck through hole (1a) is matched with the upper opening of the groove (2a) in size and shape.

3. The structure for connecting a bridge deck and a main beam of a combined type beam bridge according to claim 1, which is characterized in that: the top surface of the shear connector (3) is not higher than the upper surface of the bridge deck (1).

4. The structure for connecting a bridge deck and a main beam of a combined type beam bridge according to claim 1, which is characterized in that: the main beam (2) is made of high-performance concrete, so that the standard value of the axial tensile strength of the concrete beam is not lower than 6MPa, and the standard value of the axial compressive strength of the concrete beam is not lower than 80 MPa.