CN217710284U

CN217710284U - Combined layer, expansion joint structure and simply supported girder bridge that simply supported girder bridge expansion joint was used

Info

Publication number: CN217710284U
Application number: CN202221047706.XU
Authority: CN
Inventors: 蒋国富; 王�华; 梁茜雪; 陈仕湘; 蒋枫; 韦昊; 韦宗志; 吴冬兰; 施培华
Original assignee: Guangxi Jiaoke Group Co Ltd
Current assignee: Guangxi Jiaoke Group Co Ltd
Priority date: 2022-05-05
Filing date: 2022-05-05
Publication date: 2022-11-01
Anticipated expiration: 2032-05-05

Abstract

The utility model belongs to the technical field of bridge construction, in particular to a combination layer, an expansion joint structure and a simply supported girder bridge for an expansion joint of the simply supported girder bridge, wherein the combination layer comprises a stiffening plate, a lubricating layer and an asphalt layer; the utility model provides a combination layer has better toughness, can be fine prevent fracture and swell, and the pitch layer keeps flat with original bridge deck pavement moreover, has kept whole bridge deck pavement layer again and is continuous for the driving travelling comfort improves greatly. The lubricating layer is arranged, so that the combined layer can slide in a certain range in the running process of the vehicle, and the risk of cracking of the combined layer can be reduced. The utility model discloses an expansion joint structure, including setting up the expansion joint between the adjacent both ends of two adjacent strides of simply supported girder bridge to and set up in expansion joint department the utility model discloses a combined layer, simple structure, it is convenient to be under construction, and the expense is low, has very high spreading value. The utility model discloses a simply supported girder bridge includes the utility model discloses an expansion joint structure.

Description

Combined layer, expansion joint structure and simply supported girder bridge that simply supported girder bridge expansion joint was used

Technical Field

The utility model belongs to the technical field of the bridge construction, concretely relates to combination layer, expansion joint structure and simply supported girder bridge that simply supported girder bridge expansion joint was used.

Background

The simply supported bridge occupies an absolute dominant position in the small and medium-span bridge due to the advantages of simple and rapid construction and definite stress. However, this type of bridge has a very significant drawback, in that a joint exists between the main beam and the main beam in the longitudinal direction of the bridge, and the presence of this joint results in a considerable reduction in the comfort of the vehicle. Meanwhile, the existence of the seam often causes the existence of vehicle jumping, and the driving safety is seriously influenced. And the joint is often damaged due to long-term impact load of the vehicle. Therefore, it has become common practice to make multi-span simple girder bridges in a structure form with broken girders and continuous bridge deck. The whole bridge deck pavement layer is continuous, so that the driving comfort is greatly improved. However, under the action of the moving load of the vehicle, the place is often subjected to negative bending moment, so that the bridge deck has an abrupt angle change at the place. Therefore, from the existing maintenance results of the bridge of the type, the bridge deck often has transverse cracks, and the bridge deck must be replaced after being used for 2-5 years, so that the maintenance work is greatly increased.

Disclosure of Invention

In order to solve the problem, the utility model provides a combination layer, expansion joint structure and simple beam bridge that simple beam bridge expansion joint was used, concrete technical scheme as follows:

a combined layer for an expansion joint of a simply supported beam bridge comprises a stiffening plate, a lubricating layer and an asphalt layer; the stiffening plates are arranged at the contraction joints and fixed on the precast beams of the simply supported beam bridge; the asphalt layer is arranged on the stiffening plate and is level to the original bridge deck pavement layer of the simply supported beam bridge; the lubricating layer is arranged between the stiffening plate and the precast beam of the simply supported beam bridge or between the stiffening plate and the asphalt layer.

Preferably, the thickness of the stiffening plate is more than or equal to 2.5mm, and the tensile strength is more than or equal to 10MPa.

Preferably, the low temperature bending strain ε _ rx ≧ 12000 μ ε is provided for the asphalt layer.

An expansion joint structure comprises an expansion joint arranged between two adjacent ends of two adjacent spans of a simply supported girder bridge and a combination layer arranged at the expansion joint; the combination layer is the combination layer.

Preferably, the length of the stiffening plate is b, the length of the asphalt layer is c, both b and c are greater than the width of the expansion joint, b < c and b ≥ 2, wherein a is the distance between two adjacent ends of two adjacent spans of the simply supported bridge.

A simply supported beam bridge comprises the expansion joint structure, wherein the expansion joint structure is arranged between two adjacent bridge spans.

The utility model has the advantages that: the utility model discloses according to the continuous bridge of earlier simple back bridge floor often the phenomenon of ftractureing near the regional concrete pavement of bridge floor is continuous, provided a combination layer, expansion joint structure and simple beam bridge that simple beam bridge expansion joint used, the utility model provides a combination layer has better toughness, can be fine prevent fracture and swell, and the pitch layer keeps flat with original bridge floor pavement in addition, has kept whole bridge floor pavement layer again and is continuous for the travelling comfort improves greatly. The lubricating layer is arranged, so that the combined layer can slide in a certain range in the running process of the vehicle, and the risk of cracking of the combined layer can be reduced.

The utility model discloses an expansion joint structure adopts the pitch layer to replace the concrete pavement in bridge floor continuous department certain limit, simultaneously the utility model provides an expansion joint structure simple structure, it is convenient to be under construction, and the expense is low, has very high spreading value.

The utility model provides a simply supported girder bridge adopts the utility model provides an expansion joint structure can effectively avoid managing the unit of supporting and because of the bridge floor is near concrete pavement periodic cracking in succession and is repeated the maintenance construction, effectively reduces the traffic control that the construction rubbish brought and construction caused.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic view of a structure of a composite layer according to the present invention;

fig. 2 is the schematic view of the expansion joint structure of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

As shown in fig. 1, the specific embodiment of the present invention provides a composite layer for an expansion joint of a simply supported beam bridge, comprising a stiffening plate 2, a lubricating layer 3, and an asphalt layer 1; the stiffening plates 2 are arranged at the contraction joints and fixed on the precast beams of the simply supported beam bridge; the asphalt layer 1 is arranged on the stiffening plates 2 and is level to the original bridge deck pavement layer 6 of the simply supported girder bridge; the lubricating layer 3 is arranged between the stiffening plate 2 and the precast beam of the simply supported beam bridge or the lubricating layer 3 is arranged between the stiffening plate 2 and the asphalt layer 1. Wherein the thickness of the stiffening plate 2 is more than or equal to 2.5mm, and the tensile strength sigma is more than or equal to 10MPa. The low-temperature bending strain ε _ rx of the asphalt layer 1 is 12000 μ ε or more.

The principle of the utility model is that: the stiffening plate 2 is placed on the precast beam of simply supported girder bridge (not drawn in the drawing) along simply supported girder bridge lateral length, and set up one deck lubricating layer 3 between the precast beam of stiffening plate 2 and simply supported girder bridge, then set up one deck pitch layer 1 on stiffening plate 2, and the height of pitch layer 1 keeps level with original bridge deck pavement layer 6, set up one deck lubricating layer 3 between stiffening plate 2 and pitch layer 1, so realize that the bridge floor is continuous, and slide in a certain extent between driving in-process pitch layer 1 and the stiffening plate 2, and pitch layer 1 low temperature bending strain is great, can reduce the cracked condition of original bridge deck pavement layer in expansion joint department.

As shown in fig. 2, the embodiment of the present invention further provides an expansion joint structure, which includes an expansion joint 4 disposed between two adjacent ends of two adjacent spans of the simply supported girder bridge, and a combination layer disposed at the expansion joint 4; the combination layer is the combination layer.

The length of the stiffening plate 2 is b, the length of the asphalt layer 1 is c, both b and c are greater than the width of the expansion joint, b < c and b > 2, wherein a is the distance between two adjacent ends of two adjacent spans of the simply supported bridge. Original bridge deck pavement layer 6 sets up L type breach in expansion joint 4 department, and the length of stiffening plate 2 is less than the length on pitch layer 1, consequently forms an L type breach of falling in the junction on stiffening plate 2 and pitch layer 1, just matches with the L type breach that original bridge deck pavement layer 6 set up in expansion joint 4 department.

The specific embodiment of the utility model provides a simply supported girder bridge still, include expansion joint structure, expansion joint structure sets up between two adjacent bridge strides, and the bridge stride sets up on support 5.

Those of ordinary skill in the art will appreciate that the elements of the examples described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the components of the examples have been described above generally in terms of their functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In the embodiments provided in the present application, it should be understood that the division of the unit is only one division of logical functions, and other division manners may be used in actual implementation, for example, multiple units may be combined into one unit, one unit may be split into multiple units, or some features may be omitted.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included in the scope of the claims and description of the present invention.

Claims

1. A combined layer for an expansion joint of a simply supported beam bridge is characterized by comprising a stiffening plate, a lubricating layer and an asphalt layer; the stiffening plate is arranged at the expansion joint and fixed on the precast beam of the simply supported beam bridge; the asphalt layer is arranged on the stiffening plate and is level to the original bridge deck pavement layer of the simply supported beam bridge; the lubricating layer is arranged between the stiffening plate and the precast beam of the simply supported beam bridge and/or the lubricating layer is arranged between the stiffening plate and the asphalt layer.

2. The composite layer for an expansion joint of a simply supported beam bridge as claimed in claim 1, wherein the thickness of the stiffening plate is greater than or equal to 2.5mm, and the tensile strength is greater than or equal to 10MPa.

3. The composite layer for the expansion joint of the simply supported beam bridge as claimed in claim 1, wherein the low temperature bending strain ε _ rx of the asphalt layer is 12000 μ ε or more.

4. An expansion joint structure, its characterized in that: the bridge comprises an expansion joint arranged between two adjacent ends of two adjacent spans of the simply supported girder bridge and a combination layer arranged at the expansion joint; the composite layer is according to any one of claims 1 to 3.

5. An expansion joint structure according to claim 4, wherein: the length of the stiffening plate is b, the length of the asphalt layer is c, both b and c are larger than the width of the expansion joint, and b is less than c and more than or equal to 2, wherein the distance between two adjacent ends of two adjacent spans of the simply supported beam bridge is.

6. A simply supported beam bridge is characterized in that: the expansion joint structure comprises the expansion joint structure as claimed in any one of claims 4 to 5, wherein the expansion joint structure is arranged between two adjacent bridge spans.