CN215482241U

CN215482241U - Connecting joint for stiff framework of closure section of suspension casting continuous beam

Info

Publication number: CN215482241U
Application number: CN202120566295.4U
Authority: CN
Inventors: 马群星; 王海苗; 袁登; 吴东东; 李润东; 朱银栋; 李晶宇; 刘杉武; 章麓杰
Original assignee: Zhejiang Communications Construction Group Co Ltd
Current assignee: Zhejiang Communications Construction Group Co Ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2022-01-11
Anticipated expiration: 2031-03-19

Abstract

The utility model relates to a stiff skeleton connecting joint of a closure section of a suspension casting continuous beam, which comprises a plurality of embedded bolts arranged on a concrete layer at the connecting position of each stiff skeleton and a stiff skeleton connecting steel plate paved on the concrete layer surface, wherein the stiff skeleton connecting steel plate is fixedly connected with the embedded bolts through first nuts, the embedded bolts are uniformly distributed along the transverse bridge direction and the longitudinal bridge direction, the embedded bolts are embedded in the concrete layer with the depth of 20-25cm and the height of 6.5-7.5cm, the connecting joint also comprises the embedded steel plate paved below the concrete layer surface and fixed with the embedded bolts, and the utility model has the advantages of simple manufacture and cost saving.

Description

Connecting joint for stiff framework of closure section of suspension casting continuous beam

Technical Field

The utility model relates to the technical field of construction engineering, in particular to a connecting joint of a stiff framework of a closure section of a suspension casting continuous beam.

Background

When the closure section of the bridge is constructed, in order to enable the construction stress of the closure section to be more reasonable, a designer needs to weld a stiff framework at the lowest temperature in one day before the closure section is clearly poured in a design specification, and the stiff framework is connected with cantilever ends at two sides in a manner of welding embedded steel plates. The bottom of the cantilever end embedded steel plate is welded by H-shaped steel according to design requirements, and then the steel plate is embedded in the beam body and is poured together with reinforcing steel bars and the like. However, after the closure section is poured, the steel plate cannot be taken out in the later period, the steel plate is rusted, and asphalt pavement is peeled off. The following problems are simultaneously existed: firstly, a large amount of labor is consumed for welding the embedded part, and the technical requirement on the welder is high; secondly, a large amount of steel is buried in the concrete and cannot be taken out, and the steel does not participate in structural stress, so that resource waste is caused; and the steel plate is taken out or cut with strong force, so that the cost is high, and the structure is influenced. And the cost for coating the epoxy resin on the steel plate is high, the fundamental problem can not be solved, and the steel plate still can be rusted after a long time in a high-temperature and high-humidity environment. In order to solve the problems, the connection joint of the rigid framework of the closure section of the suspension casting continuous beam is designed according to the actual situation.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides the connecting joint of the stiff frameworks of the closure sections of the suspension casting continuous beams, which is simple to manufacture and saves cost.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the suspension pouring continuous beam closure section stiff skeleton connecting joint comprises a plurality of embedded bolts arranged on a concrete layer at the connecting position of each stiff skeleton and a stiff skeleton connecting steel plate paved on the concrete layer surface, wherein the stiff skeleton connecting steel plate is fixedly connected with the screw embedded bolts through first nuts, the embedded bolts are uniformly distributed along the transverse bridge direction and the longitudinal bridge direction, the depth of the embedded bolts embedded in the concrete layer is 20-25cm, the height of the concrete layer extending out of the embedded bolts is 6.5-7.5cm, and the suspension pouring continuous beam closure section stiff skeleton connecting joint further comprises an embedded steel plate paved below the concrete layer surface and fixed with the embedded bolts.

Preferably, the embedded bolts are provided with 12 bolts, four rows of the embedded bolts are uniformly arranged along the longitudinal bridge direction, and 3 bolts are uniformly embedded in each row along the transverse bridge direction.

Preferably, the embedded bolt is embedded in the concrete layer to a depth of 23 cm.

Preferably, the height of the embedded bolt extending out of the concrete layer is 7.2 cm.

Preferably, the height of the embedded steel bars from the concrete layer is 10 cm.

Preferably, a washer is further arranged between the first nut and the stiff framework connecting steel plate.

Preferably, reinforcing steel bars are installed at the top of the embedded steel plates corresponding to the positions of the embedded bolts, and the number of the reinforcing steel bars is 12.

Preferably, the specification of the stiff skeleton connecting steel plate is 60cm multiplied by 70cm multiplied by 2 cm.

Preferably, the embedded bolt is GB/T1228M 27 multiplied by 285 bolt.

Preferably, the transverse bridge-direction reinforcing steel bars are 2.5m of C12; c12 of 1.2m reinforcement bar in the longitudinal direction.

The steel plate for the stiff skeleton connecting steel plate is laid on the concrete layer surface, the embedded bolts are arranged under the concrete, the structure is simple, materials required by the joint can be processed in batches by a factory, the joint is simple to manufacture and can be transported to a site for installation, no technical requirements are required for workers, construction can be carried out according to a diagram, the operation is convenient, the steel plate for the stiff skeleton connecting steel plate is easy to take out after the embedded parts are installed, after concrete pouring closure is carried out, only the bolts are subjected to rust prevention treatment, the construction is simple and convenient, and the durability of asphalt pavement is basically not influenced; and the cost is saved by a lot compared with the pre-buried steel plate of the common process, and each thick steel plate can be repeatedly used.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic structural view of a single embedded bolt of the present invention;

fig. 4 is a diagram of the present invention for laying reinforcing bars.

Wherein, 1, embedding a bolt; 2. the stiff framework is connected with a steel plate; 3. a first nut; 4. a concrete layer; 5. pre-burying a steel plate; 6. a gasket; 7. reinforcing steel bars; 8. a second nut; 9. a stiff skeleton steel support beam.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate positional relationships based on the orientations and positional relationships shown in the drawings, are only for convenience of description and simplicity of description, and do not indicate or imply that the method or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," "retained," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; the two elements can be directly connected or indirectly connected through an intermediate medium, and the two elements can be communicated with each other at the inner sections. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention 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 utility model and are not intended to limit the utility model.

As shown in fig. 1 to 4, an embodiment of the present invention provides a stiff skeleton connection joint of a closure section of a suspension cast continuous beam, the connection joint includes a plurality of embedded bolts 1 disposed at a connection position of each stiff skeleton 4 and a stiff skeleton connection steel plate 2 laid on a surface of the concrete layer 4, the stiff skeleton connection steel plate 2 is fixedly connected with a bolt embedded bolt through a first nut 3, wherein the embedded bolts 1 are uniformly arranged along a horizontal bridge direction and a vertical bridge direction, the embedded bolts 1 are embedded in the concrete layer 4 at a depth of 20-25cm, and a height of a surface extending out of the concrete layer 4 is 6.5-7.5cm, and the connection joint further includes an embedded steel plate 5 laid below a concrete layer and fixed with the embedded bolts 1; the joint is simple in structure, materials required by the joint can be processed in batches by a factory, the joint is simple to manufacture, the joint is transported to a site for installation, no technical requirements are required for workers, construction can be carried out according to a drawing, operation is convenient, after the embedded parts are installed, after concrete pouring closure, the stiff skeleton connecting steel plate 2 is easy to take out, only the screw rod is subjected to rust prevention treatment, construction is simple and convenient, and the durability of asphalt pavement is basically not influenced; compared with the embedded steel plates 5 of the common process, the cost is saved, and each thick steel plate can be repeatedly used

Preferably, the embedded bolts 1 are provided with 12 bolts, four rows of the embedded bolts are uniformly arranged along the longitudinal bridge direction, and 3 bolts are uniformly embedded in each row along the transverse bridge direction; the depth of the embedded bolt 1 embedded in the concrete layer 4 is 23 cm; the height of the embedded bolt 1 extending out of the surface 4 of the concrete layer is 7.2 cm; the height between the embedded steel bars and the surface 4 of the concrete layer is 10 cm; the height is set to meet the actual construction requirement, and the connection effect and the stabilizing effect are optimal;

more preferably, a gasket 6 is further arranged between the first nut 3 and the stiff skeleton connecting steel plate 2; the embedded steel plates 5 are fixed by two second nuts 8 with common strength, reinforcing steel bars 7 are arranged at the top parts corresponding to the positions of the embedded bolts 1, and 12 reinforcing steel bars 7 are arranged in total; the 2 specification of the stiff skeleton connecting steel plate is 60cm multiplied by 70cm multiplied by 2 cm; the embedded bolt 1 adopts a GB/T1228M 27 multiplied by 285 bolt; 3 reinforcing steel bars 7 in the transverse bridge direction are 2.5m C12; c12 of 4 reinforcing steel bars 71.2m in the longitudinal direction; the first nut 3 is a high-strength nut of GB/T1229M 27; the gasket 6 is a high-strength gasket 6 of GB/T123027, and the embedded bolt 1 is also a high-strength bolt, so that the stress strength is kept, and the stiff skeleton connecting steel plate 2 is prevented from shifting.

The construction method of the utility model comprises the following steps:

12 high-strength preset bolts are embedded in the connecting position of each stiff skeleton in the concrete layer 4, extend out of the surface of the concrete layer 4 by 7.2cm and are embedded in the concrete layer 423 cm; embedding 60cm multiplied by 70cm multiplied by 0.5cm embedded steel plates 5 10cm below a concrete surface, fixing the steel plates by two common nuts, installing reinforcing steel bars 7 at the tops of the embedded steel plates 5, reinforcing 3C 12 with 2.5m to each two steel plates in a transverse bridge direction, reinforcing 4C 12 with 1.2m to each steel plate in a longitudinal bridge direction, and reinforcing the upper and lower steel bars at the periphery of each steel plate by 12 drag ribs; a stiff skeleton connecting steel plate 2 with the thickness of 60cm multiplied by 70cm multiplied by 2cm is adopted on the concrete surface, and the stiff skeleton connecting steel plate 2 is connected with the embedded bolt 1 by adopting a high-strength first nut 3 and a gasket 6; a row of bolt holes in the middle are formed in the connecting position of the stiff framework and the stiff framework connecting steel plate 2, holes need to be drilled in the corresponding positions of the stiff framework, the first nuts 3 and the gaskets 6 are firstly screwed, and then the stiff framework is installed.

It should be noted that the above embodiments are merely representative examples of the present invention. Many variations of the utility model are possible. Any simple modification, equivalent change and modification of the above embodiments according to the spirit of the present invention should be considered to be within the protection scope of the present invention.

Claims

1. Hang and water continuous beam closure section strength nature skeleton attach fitting, its characterized in that: the connecting joint comprises a plurality of embedded bolts (1) arranged on a concrete layer (4) at the connecting position of each stiff skeleton and stiff skeleton connecting steel plates (2) laid on the surface of the concrete layer (4), wherein the stiff skeleton connecting steel plates (2) are fixedly connected with screw embedded bolts through first nuts (3), the embedded bolts (1) are uniformly distributed along the transverse bridge direction and the longitudinal bridge direction, the embedded bolts (1) are embedded in the concrete layer (4) in a depth of 20-25cm, the height of the surface extending out of the concrete layer (4) is 6.5-7.5cm, and the connecting joint further comprises embedded steel plates (7) which are laid under the concrete layer and are fixed with the embedded bolts (1).

2. The connecting joint of the stiff skeleton of the closure section of the continuous beam cast in suspension according to claim 1, wherein 12 embedded bolts (1) are uniformly arranged in four rows along the longitudinal bridge direction, and 3 embedded bolts are uniformly embedded in each row along the transverse bridge direction.

3. The connecting joint of the stiff skeleton of the closure section of the suspension casting continuous beam according to claim 1, wherein the embedded bolts (1) are embedded in the concrete layer (4) to a depth of 23 cm.

4. The connecting joint of the stiff skeleton of the closure section of the suspension casting continuous beam according to claim 3, wherein the height of the embedded bolts (1) extending out of the surface of the concrete layer (4) is 7.2 cm.

5. The connecting joint of the stiff frameworks of the closure sections of the suspension casting continuous beam as claimed in claim 1, wherein the height of the embedded steel bars from the surface of the concrete layer (4) is 10 cm.

6. The connecting joint of the stiff skeleton of the closure section of the cast-in-place continuous beam according to claim 1, wherein a gasket (6) is further arranged between the first nut (3) and the steel plate (2) for connecting the stiff skeleton.

7. The connecting joint of the steel skeleton of the closure section of the suspension casting continuous beam as claimed in claim 2, wherein the top of the embedded steel plate (7) is provided with a reinforcing steel bar (7) corresponding to the position of the embedded bolt (1).

8. A stiff skeleton joint of a closure section of a cantilever beam according to claim 1, wherein the steel plate (2) is 60cm x 70cm x 2 cm.

9. The connecting joint of the stiff frameworks of the closure sections of the suspension casting continuous beam as claimed in claim 1, wherein the embedded bolts (1) are GB/T1228M 27X 285 bolts.

10. A connection joint of a stiff skeleton of a closure section of a suspension casting continuous beam according to claim 7, characterized in that the transverse bridge direction reinforcing steel bar (7) is C12 of 2.5 m; the reinforcing steel bar (7) in the longitudinal bridge direction is 1.2m of C12.