CN215976824U

CN215976824U - Cast-in-place wet seam structure of prefabricated bridge floor no template

Info

Publication number: CN215976824U
Application number: CN202121383116.XU
Authority: CN
Inventors: 陈奉民; 刘小辉; 谢小华; 郑升宝; 吴勇; 张昊
Original assignee: China Railway Changjiang Transportation Design Group Co ltd
Current assignee: China Railway Changjiang Transportation Design Group Co ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2022-03-08
Anticipated expiration: 2031-06-22

Abstract

The utility model discloses a prefabricated bridge deck template-free cast-in-place wet joint structure, which belongs to the technical field of bridge design and comprises a plurality of prefabricated plates arranged along the bridge direction and a cast-in-place section continuously laid between two adjacent prefabricated plates, wherein the two ends of the prefabricated plates along the bridge direction are provided with half U-shaped structure extension sections, the half U-shaped structure extension sections of the two adjacent prefabricated plates are butted to form a whole U-shaped notch to serve as a bottom die of the cast-in-place section, the cast-in-place section is connected with the two adjacent prefabricated plates in a pouring way, and the prefabricated plates and the cast-in-place section are made of concrete materials or ultra-high performance concrete materials.

Description

Cast-in-place wet seam structure of prefabricated bridge floor no template

Technical Field

The utility model relates to the field of bridge design, in particular to a template-free cast-in-place wet joint structure of a prefabricated bridge deck.

Background

The steel-concrete combined beam bridge is a structural form which is different from the traditional beam bridge and developed by combining the respective advantages of two materials on the basis of a steel beam and a reinforced concrete beam, can realize standardized design, industrial manufacture and assembly construction to the maximum extent, reduces field operation, and is widely applied to the field of bridge engineering in recent years. The method is characterized in that wet joints are the key points in the design of the steel-concrete composite beam, and the prefabricated parts are assembled to form a whole body with stable stress, currently, when the conventional steel-concrete composite beam is used for performing the longitudinal wet joint operation on the bridge deck, a template is firstly erected at the position of the reserved wet joints after the prefabricated bridge deck is erected, and then concrete at the wet joint section is poured, and the method has the following defects: 1. the work load of building templates on site is large, the quality controllability is poor, and the structural strength of the wet joint is influenced; 2. construction cost and risk of high-altitude operation are increased; 3. the potential safety hazard to the passing under the bridge is inevitably caused before the template is built.

Disclosure of Invention

Aiming at the problems, the utility model provides a prefabricated bridge deck template-free cast-in-place wet joint structure.

In order to achieve the purpose, the utility model is realized by the following technical scheme: a precast bridge deck template-free cast-in-place wet joint structure comprises a plurality of precast slabs and a cast-in-place section, wherein the precast slabs are distributed along the bridge direction, the cast-in-place section is continuously laid between two adjacent precast slabs, two ends of each precast slab along the bridge direction are provided with half U-shaped structure extension sections, and the half U-shaped structure extension sections of the two adjacent precast slabs are butted to form a whole U-shaped notch to serve as a bottom die of the cast-in-place section; the cast-in-place section is connected with two adjacent precast slabs in a pouring mode, and the precast slabs and the cast-in-place section are made of concrete materials or ultra-high performance concrete materials.

Furthermore, the upper end surface of the cast-in-place section is flush with the upper end surface of the precast slab.

Furthermore, a certain range of the fiber reinforced materials are preset at the bottoms of the four corners of the prefabricated panel.

Furthermore, a plurality of horizontal steel bars are pre-embedded in the prefabricated plates along the bridge direction, each horizontal steel bar is arranged at intervals along the transverse bridge, and two ends of each horizontal steel bar extend into two adjacent prefabricated plates.

Furthermore, about 1cm of working gap is reserved between the bottoms of the half U-shaped structure extension sections of the two adjacent precast slabs, and sealing sponge is filled in the working gap.

Furthermore, the bottom of the half U-shaped structural extension section is embedded with a horizontal reinforcing mesh.

Advantageous effects

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

the prefabricated bridge deck template-free cast-in-place wet joint structure is suitable for connecting prefabricated bridge decks of any bridge span and any bridge width combined beam, is convenient to construct, reduces construction cost and avoids potential safety hazards of passing under a bridge compared with a conventional wet joint structure, and the wet joint bottom die and the bridge decks are prefabricated together in a factory, so that construction quality and installation accuracy are guaranteed.

Drawings

FIG. 1 is a three-dimensional structural schematic view of a precast bridge deck template-free cast-in-place wet joint structure of the present invention.

FIG. 2 is a schematic structural view of the plane of the prefabricated panel according to the present invention.

FIG. 3 is a schematic structural view of a side cross-section of a corresponding prefabricated panel according to the present invention.

FIG. 4 is a schematic, partly in section, construction of an extension of the present invention.

Fig. 5 is a schematic structural view of a prefabricated panel wet seam construction according to the present invention.

In the figure: precast slab-1, horizontal steel bar-2, fiber reinforced material-3, steel bar net-4, construction extension-5, notch-6, working gap-7 and cast-in-place section-8.

Detailed Description

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

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example (b):

referring to fig. 1-5, the embodiments of the present invention are as follows: a precast bridge deck template-free cast-in-place wet joint structure comprises a plurality of precast slabs 1 arranged along the bridge direction and a cast-in-place section 8 continuously laid between two adjacent precast slabs 1, wherein the two ends of each precast slab 1 along the bridge direction are provided with half U-shaped structure extension sections 5, the half U-shaped structure extension sections of the two adjacent precast slabs are butted to form a whole U-shaped notch 6 serving as a bottom die of the cast-in-place section 8, so that a large amount of template engineering workload on site is avoided, the construction process quality of the wet joint structure is effectively controlled, and the stress continuity of the structure at a wet joint is ensured; the cast-in-place section 8 is connected with two adjacent precast slabs 1 in a pouring mode, and the precast slabs 1 and the cast-in-place section 8 are made of concrete materials or ultra-high performance concrete materials.

Further, the upper end face of the cast-in-place section 8 is flush with the upper end face of the precast slab 1.

Furthermore, a certain range of the fiber reinforced materials 3 are preset at the bottoms of the four corners of the prefabricated slab 1 to prevent concrete from falling off due to collision in the transportation process.

Furthermore, a plurality of horizontal steel bars 2 are pre-embedded in the prefabricated plates 1 along the bridge direction, each horizontal steel bar 2 is arranged at intervals along the transverse bridge, and two ends of each horizontal steel bar 2 extend into two adjacent prefabricated plates 1, so that the connection between a cast-in-place section and the adjacent prefabricated plates is tighter, and the structural strength of a wet joint is further enhanced.

Further, a working gap 7 of about 1cm is reserved between the bottoms of the half U-shaped structure extension sections 5 of the two adjacent precast slabs 1, and sealing sponge is filled in the working gap 7.

Furthermore, the bottom of the half U-shaped structural extension section 5 is pre-embedded with a horizontal reinforcing mesh 4 to prevent the concrete at the bottom of the extension section from cracking.

Based on the above embodiment, the specific working principle is as follows: horizontal steel bars 2 and a steel bar mesh 4 in a prefabricated slab 1 are pre-buried in a factory, fiber reinforced materials 3 in a certain range are arranged at the bottoms of four corners of the prefabricated slab 1, concrete of the prefabricated slab 1 is poured, the prefabricated slab 1 is transported to the site after sufficient storage time is ensured, the prefabricated slab 1 in a corresponding section is erected, a working gap 7 of about 1cm is reserved between the bottoms of half U-shaped structure extension sections 5 of two adjacent prefabricated slabs, sealing sponge is filled in the working gap 7, then concrete of a cast-in-place section 8 is poured, and site construction of the prefabricated slab 1 is completed.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a precast bridge floor does not have cast-in-place wet joint structure of template, the structure includes prefabricated plate (1), horizontal reinforcing bar (2), fibre reinforced material (3), reinforcing bar net (4), structure extension (5), notch (6), working gap (7), cast-in-place section (8), its structure includes that the polylith is arranged in the bridge direction prefabricated plate (1) to and lay in succession two adjacent prefabricated plate (1) between cast-in-place section (8), its characterized in that:

the two ends of the precast slab (1) along the bridge direction are provided with semi-U-shaped structure extension sections (5), and the semi-U-shaped structure extension sections of two adjacent precast slabs are butted to form a whole U-shaped notch (6) to serve as a bottom die of the cast-in-place section (8);

the cast-in-place section (8) is connected with two adjacent precast slabs (1) in a pouring mode, and the precast slabs (1) and the cast-in-place section (8) are made of concrete materials or ultra-high performance concrete materials.

2. The precast bridge deck formless cast-in-place wet joint structure of claim 1, wherein: the upper end surface of the cast-in-place section (8) is flush with the upper end surface of the precast slab (1).

3. The precast bridge deck formless cast-in-place wet joint structure of claim 1, wherein: the fiber reinforced materials (3) in a certain range are preset at the bottoms of the four corners of the precast slab (1).

4. The precast bridge deck formless cast-in-place wet joint structure of claim 1, wherein: the prefabricated slab (1) is pre-buried with many horizontal reinforcing bar (2) along the bridge direction, every horizontal reinforcing bar (2) are along horizontal bridge interval arrangement, the both ends of horizontal reinforcing bar (2) extend to adjacent two in the prefabricated slab (1).

5. The precast bridge deck formless cast-in-place wet joint structure of claim 1, wherein: the semi-U-shaped structure of the two adjacent prefabricated plates (1) is characterized in that a working gap (7) which is about 1cm is reserved between the bottoms of the structure extension sections (5), and sealing sponge is filled in the working gap (7).

6. The precast bridge deck formless cast-in-place wet joint structure of claim 1, wherein: the bottom of the half U-shaped structural extension section (5) is embedded with a horizontal reinforcing mesh (4).