Narrow slit structure system applied to bridge deck slab connection

Abstract

The utility model relates to a narrow slit construction system applied to bridge deck slab connection, which comprises a first bridge deck slab and a second bridge deck slab, a pouring groove used for filling concrete in the later period is arranged between the first bridge deck slab and the second bridge deck slab, a plurality of first reinforcing steel bars provided with threads are arranged on the connecting face of the first bridge deck slab, and a plurality of second reinforcing steel bars are arranged on the connecting face of the second bridge deck slab. A plurality of second reinforcing steel bars with threads are arranged on the connecting face of the second bridge deck slab, and the first reinforcing steel bars are in threaded connection with the second reinforcing steel bars through sleeves. According to the scheme, the two bridge deck slabs are connected together through a mechanical structure, and the effects that the site concrete pouring amount is reduced, and cracks caused by concrete shrinkage are avoided are achieved; the effects of reducing the proportion of wet operation in a bridge construction project and improving the safety of a bridge structure are also achieved; in addition, sleeve mechanical connection is adopted, field welding operation is avoided, material loss is reduced, and carbon emission is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge deck construction, in particular to a narrow slot construction system used for connecting bridge decks. Background Art

[0002] At present, steel-concrete composite bridges all have on-site wet joint operations. Traditional wet joint operations involve a large number of processes such as steel bar binding, steel bar welding and concrete pouring. The construction quality is difficult to control, and weak positions are easily formed at the stress-bearing parts of the steel-concrete composite bridges, which is prone to bridge damage during the later service of the bridge. Utility Model Content

[0003] The utility model aims to provide a narrow gap construction system for connecting bridge decks, so as to solve the problems encountered in the above-mentioned background technology.

[0004] To achieve the above purpose, the technical solution of the utility model is as follows:

[0005] A narrow gap construction system for bridge deck connection includes a first bridge deck and a second bridge deck, a casting trough for later filling of concrete is provided between the first bridge deck and the second bridge deck, a plurality of first threaded steel bars are provided on the connection surface of the first bridge deck, a plurality of second threaded steel bars are provided on the connection surface of the second bridge deck, and the first steel bars are threadedly connected to the second steel bars via sleeves.

[0006] In the above solution, the sleeve is a cylindrical structure, with a mounting hole inside, and a spiral groove on the outer wall of the mounting hole; one end of the sleeve is threadedly connected to the first steel bar through the spiral groove, and the other end is threadedly connected to the second steel bar. As a preferred solution, both ends of the mounting hole are provided with tapered guide grooves.

[0007] In the above scheme, the connection structure between the sleeve and the first steel bar and the second steel bar is provided with at least one layer in the casting trough; the number of the sleeves in each layer is the same as the number of the first steel bars, and the number of the first steel bars is the same as the number of the second steel bars.

[0008] Compared with the prior art, the beneficial effects of the utility model are: connecting two bridge decks together through a mechanical structure can reduce the amount of concrete pouring on site and avoid cracks caused by concrete shrinkage; it can also reduce the proportion of wet operations in bridge construction projects and improve the safety of bridge structures; in addition, the use of sleeve mechanical connection can avoid on-site welding operations, reduce material loss, and reduce carbon emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them:

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0011] Figure 2 It is a side view structural schematic diagram of the utility model;

[0012] Figure 3 It is a schematic diagram of the internal structure of the sleeve in the utility model.

[0013] Numbers in the figure: 1-first bridge deck; 11-first steel bar; 2-second bridge deck; 21-second steel bar; 3-casting trough; 31-sleeve; 32-mounting hole; 33-spiral groove; 34-guide groove. DETAILED DESCRIPTION

[0014] In order to make the technical means, creative features, objectives and effects of the utility model easier to understand, the utility model is now further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the relevant components of the utility model.

[0015] According to the technical solution of the utility model, without changing the essential spirit of the utility model, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the utility model, and should not be regarded as the entirety of the utility model or as a limitation or restriction to the technical solution of the utility model.

[0016] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] like Figure 1 and Figure 2 As shown, a narrow gap construction system for bridge deck connection includes a first bridge deck 1 and a second bridge deck 2. A casting trough 3 for later filling with concrete is provided between the first bridge deck 1 and the second bridge deck 2. The casting trough 3 is mainly used to firmly connect the two bridge decks together by pouring concrete. Due to the convenience of construction, there is often a very narrow gap between the two bridge decks, which is about 10-15 cm. During construction, it is called narrow gap construction.

[0018] The connection surface of the first bridge deck 1 is provided with a plurality of first steel bars 11 with threads, and the connection surface of the second bridge deck 2 is provided with a plurality of second steel bars 21 with threads, and the first steel bars 11 are threadedly connected to the second steel bars 21 through sleeves 31. Connecting the two bridge decks together through a mechanical structure has the effect of reducing the amount of concrete poured on site and avoiding cracks caused by concrete shrinkage; it also has the effect of reducing the proportion of wet work in bridge construction projects and improving the safety of bridge structures; in addition, the use of sleeves 31 for mechanical connection avoids on-site welding operations, reduces material loss, and reduces carbon emissions.

[0019] For details, please refer to Figure 3 The sleeve 31 is a cylindrical structure with a mounting hole 32 inside. A spiral groove 33 matching the head thread of the steel bar is processed on the outer wall of the mounting hole 32. One end of the sleeve 31 is threadedly connected to the first steel bar 11 through the spiral groove 33, and the other end is threadedly connected to the second steel bar 21.

[0020] As a preferred solution, conical guide grooves 34 are provided at both ends of the installation hole 32 to guide the steel bars during installation.

[0021] During implementation, the connection structure between the sleeve 31 and the first steel bar 11 and the second steel bar 21 is provided in at least one layer in the casting trough 3. Figure 2 As shown, it can be seen that two layers are provided here. The number of sleeves 31 in each layer is the same as the number of first steel bars 11, and the number of first steel bars 11 is the same as the number of second steel bars 21, that is, one sleeve 31 is respectively equipped with one first steel bar 11 and one second steel bar 21, and the number is the same.

[0022] It is worth noting that concrete is a general term for engineering composite materials in which aggregates are bonded into a whole by cementitious materials. Ultra-high performance concrete is used as the main material for wet joints. Both the first steel bar 11 and the second steel bar 21 refer to steel for reinforced concrete and prestressed reinforced concrete, and their cross-sections are circular. The protruding parts of the steel bar ends should be all threaded. The sleeve 31 is a connector for connecting steel bars and has an internal thread corresponding to the thread head thread.

[0023] The purpose of the utility model is to optimize the steel-concrete composite bridge structure and reduce the problem of on-site wet joint operations, and to provide a narrow gap structure form using bridge deck connections, which can improve the safety of the steel-concrete composite bridge structure while reducing the amount of on-site wet joint operations and reducing carbon emissions.

[0024] In specific implementation, before erecting the bridge deck, the first steel bar 11 extending from one side of the first bridge deck 1 of the wet joint is screwed onto the sleeve 31 for connection, and the sleeve 31 is screwed until the end of the first steel bar 11 is exposed. After the second bridge deck 2 is erected to the top plate of the steel beam, the sleeve 31 is screwed back and screwed onto the extended second steel bar 21, and the extended steel bars of each of the two bridge decks occupy half the length of the sleeve 31. After the sleeve 31 is connected, the wet joint pouring operation is carried out, and concrete is poured into the pouring trough 3 in the wet joint, and cured until the strength reaches the design value, and the ultra-narrow joint structure construction is completed.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. These undisclosed elements are all prior art that can be known to those skilled in the art.

[0026] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A narrow gap structural system for connecting bridge decks, comprising a first bridge deck (1) and a second bridge deck (2), wherein a casting trough (3) for later filling with concrete is provided between the first bridge deck (1) and the second bridge deck (2), characterized in that: The connection surface of the first bridge deck (1) is provided with a plurality of first steel bars (11) processed with threads, and the connection surface of the second bridge deck (2) is provided with a plurality of second steel bars (21) processed with threads, and the first steel bars (11) are threadedly connected to the second steel bars (21) via sleeves (31).

2. A narrow gap structural system for bridge deck connection according to claim 1, characterized in that: The sleeve (31) is a cylindrical structure, with a mounting hole (32) provided inside, and a spiral groove (33) provided on the outer wall of the mounting hole (32); one end of the sleeve (31) is threadedly connected to the first steel bar (11) through the spiral groove (33), and the other end is threadedly connected to the second steel bar (21).

3. The narrow gap structural system for bridge deck connection according to claim 2, characterized in that: Conical guide grooves (34) are provided at both ends of the mounting hole (32).

4. The narrow gap structural system for bridge deck connection according to claim 1, characterized in that: The connection structure of the sleeve (31) and the first steel bar (11) and the second steel bar (21) is provided in at least one layer in the casting trough (3); the number of the sleeves (31) in each layer is the same as the number of the first steel bars (11), and the number of the first steel bars (11) is the same as the number of the second steel bars (21).

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