An assembled bridge

Abstract

The present invention relates to the technical field of bridge construction, and particularly relates to a prefabricated bridge, comprising: a plurality of precast beam segments, wherein two adjacent precast beam segments are spliced and fixed longitudinally through a first connecting sleeve to form a first connecting beam segment; a second connecting sleeve for fixing two adjacent first connecting beam segments transversely to form a second connecting beam segment; a precast cover plate laid on the main beam formed by assembling a plurality of second connecting beam segments; and a bridge deck laid on the precast cover plate. The present invention provides a prefabricated bridge that is convenient for transportation and construction, and has high construction efficiency and quality.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to an assembled bridge. Background Art

[0002] Existing precast T-beam bridges utilize a transverse assembly technique. After the T-beams are prefabricated in the factory, the wet joints of the crossbeams and bridge decks are cast on-site. This mature technology has been widely adopted in bridge construction. However, it presents two challenges: First, the length of precast T-beams is significantly affected by road transportation, and the turning radius of roads limits the application of large-span precast T-beam structures. This can only be addressed by reducing the span, setting up an on-site precast plant, or switching to a cast-in-place structure. Second, the wet joint construction of the crossbeams and bridge decks requires the erection of scaffolding formwork, and the quality of the wet joints is often difficult to guarantee. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art of large-span prefabricated T-beams, which are inconvenient to transport, affecting the construction progress, and requiring the establishment of support formwork, which affects the construction quality, thereby providing an assembled bridge that is convenient to transport and construct, and has high construction efficiency and quality.

[0004] In order to solve the above technical problems, the present invention provides a prefabricated bridge, comprising:

[0005] A plurality of prefabricated beam segments, wherein two adjacent prefabricated beam segments are longitudinally spliced and fixed by a first connecting sleeve to form a first connecting beam segment;

[0006] a second connecting sleeve, fixing two adjacent first connecting beam sections in a transverse direction to form a second connecting beam section;

[0007] a prefabricated cover plate, laid on a main beam formed by assembling a plurality of the second connecting beam segments;

[0008] The bridge deck is laid on the prefabricated cover plate.

[0009] In the fabricated bridge, the first connecting sleeve includes two first half-sleeves that are spliced together in the transverse direction, and the bottoms of the two first half-sleeves are fixed by a connecting piece.

[0010] In the prefabricated bridge, a first connecting steel bar is provided on the top of the splicing surface of the first half-tube, and a second connecting steel bar is provided on the top of the splicing surface of the prefabricated beam segment. The first connecting steel bar and the second connecting steel bar are cross-fixed.

[0011] In the prefabricated bridge, the first connecting steel bar includes a pair of symmetrically arranged L-shaped steel bars, the second connecting steel bar is a U-shaped steel bar, the pair of U-shaped steel bars cross each other and are fixed to the L-shaped steel bar by a vertically arranged third connecting steel bar.

[0012] For the prefabricated bridge described above, the second connecting sleeve includes two second half cylinders spliced together longitudinally, and the two second half cylinders are spliced and fixed to the two first half cylinders arranged back to back.

[0013] For the prefabricated bridge described above, a plurality of fourth connecting steel bars are arranged at intervals on the splicing surface of the second half cylinder, and fifth connecting steel bars are arranged on the splicing surfaces of the two first half cylinders arranged back to back. The fourth connecting steel bars and the fifth connecting steel bars are cross-fixed.

[0014] For the prefabricated bridge described above, a plurality of the fourth connecting steel bars are L-shaped steel bars arranged symmetrically, the fifth connecting steel bar is a U-shaped steel bar, and the fourth connecting steel bar and the fifth connecting steel bar are fixed by a sixth connecting steel bar arranged vertically.

[0015] For the prefabricated bridge described above, it further includes a ring-shaped steel bar for connecting the fourth connecting steel bar and the fifth connecting steel bar. The ring-shaped steel bar is arranged crosswise with both the fourth connecting steel bar and the fifth connecting steel bar and is fixed by the sixth connecting steel bar.

[0016] For the prefabricated bridge described above, a concrete reinforcement structure is poured in both the first connecting sleeve and the second connecting sleeve.

[0017] For the prefabricated bridge described above, seventh connecting steel bars are provided on the precast cover plate, and the precast cover plate is connected to the main beam through the seventh connecting steel bars.

[0018] The technical solution of the present invention has the following advantages:

[0019] 1. For the prefabricated bridge provided by the present invention, the main beam is divided into multiple precast beam segments longitudinally, prefabricated and processed in a factory, then transported to the construction site, spliced and fixed through the first connecting sleeve to form a first connecting beam segment. After being hoisted in place, the adjacent two first connecting beam segments are fixed transversely through the second connecting sleeve to form a second connecting beam segment. Finally, the precast cover plate and the bridge deck are laid in sequence to complete the assembly. Since the main beam is divided into multiple segments longitudinally, the transportation weight and length are reduced, and the first connecting sleeve and the second connecting sleeve play a supporting role while connecting, eliminating the need for scaffolding formwork and demolition, resulting in higher construction efficiency and quality.

[0020] 2. For the prefabricated bridge provided by the present invention, the first connecting sleeve includes two first half cylinders spliced together transversely, and the second connecting sleeve includes two second half cylinders spliced together longitudinally. The precast beam segments and the first connecting beam segments are connected by a splicing method, making the construction more convenient.

[0021] 3. The prefabricated bridge provided by the present invention has the first half cylinder and the precast beam segment, and the second half cylinder and the first half cylinder fixed by cross - arranged connecting steel bars, and concrete reinforcement structures are poured in both the first connecting sleeve and the second connecting sleeve, ensuring the firmness and reliability of the connection of the prefabricated bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a cross - sectional view of the prefabricated bridge provided by the present invention in the transverse direction;

[0024] Figure 2 It is a partial top view of the prefabricated bridge provided by the present invention before laying the precast cover slab and the bridge deck;

[0025] Figure 3 is Figure 2 exploded view of.

[0026] Description of the reference numerals:

[0027] 1, precast cover slab; 2, bridge deck; 3, second connecting beam segment; 4, second connecting sleeve; 5, first connecting beam segment; 6, first connecting sleeve; 7, precast beam segment; 8, connecting piece; 9, filling space; 10, first connecting steel bar; 11, second connecting steel bar; 12, third connecting steel bar; 13, fourth connecting steel bar; 14, fifth connecting steel bar; 15, sixth connecting steel bar; 16, circular steel bar; 17, seventh connecting steel bar. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0029] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Such as Figures 1 to 3 shown in a specific embodiment of the prefabricated bridge, including a main beam, a precast cover slab 1 and a bridge deck 2 laid successively on the main beam.

[0031] The main beam includes a plurality of second connecting beam segments 3 spliced and fixed transversely. The second connecting beam segments 3 are formed by connecting two adjacent first connecting beam segments 5 transversely with a second connecting sleeve 4, and two adjacent second connecting beam segments 3 are also connected and fixed by the second connecting sleeve 4. The first connecting beam segments 5 are formed by longitudinally splicing two adjacent precast beam segments 7 with a first connecting sleeve 6. The precast beam segments 7, the first connecting sleeve 6, and the second connecting sleeve 4 are all prefabricated and formed in the factory.

[0032] The first connecting sleeve 6 includes two first half cylinders spliced with each other transversely. The bottoms of the two first half cylinders are fixed by bolts serving as connectors 8. The first half cylinder is of an inverted L-shaped structure, and the two first half cylinders are spliced with each other to form a T-shaped structure, and a filling space 9 for a concrete reinforcement structure is reserved between the two first half cylinders. At the top of the splicing surface of the first half cylinder, there is a first connecting steel bar 10. The first connecting steel bar 10 includes a pair of L-shaped steel bars arranged symmetrically. The horizontal parts of the pair of L-shaped steel bars extend towards each other and are spaced apart, and are spliced into a rectangle. At the top of the splicing surface of the precast beam segment 7, there is a second connecting steel bar 11. The second connecting steel bar 11 is a U-shaped steel bar. The opening of the U-shaped steel bar is fixed to the precast beam segment 7. The pair of U-shaped steel bars cross and partially overlap with each other, and cross with the L-shaped steel bars. At the overlapping part where the U-shaped steel bar and the L-shaped steel bar cross, a third connecting steel bar 12 is vertically arranged. The U-shaped steel bar and the L-shaped steel bar are connected and fixed by the third connecting steel bar 12, thereby realizing the splicing of two adjacent precast beam segments 7. The assembly of the entire main beam in the longitudinal direction is completed according to the above operation method.

[0033] The second connecting sleeve 4 includes two second half cylinders spliced with each other longitudinally. The two second half cylinders are spliced and fixed to the two first half cylinders arranged back to back, and a filling space for a concrete reinforcement structure is reserved between the two second half cylinders. The second half cylinder is a cuboid. A plurality of fourth connecting steel bars 13 are spaced on the splicing surface of the second half cylinder. The plurality of fourth connecting steel bars 13 are L-shaped steel bars symmetrically arranged with the vertical bisector of the cuboid as the axis of symmetry. A boss is formed on the surface of the first half cylinder opposite to the surface where the first connecting steel bar 10 is provided. The boss is inserted into the two second half cylinders for fixation. On the splicing surface of the boss, there is a fifth connecting steel bar 14. The fifth connecting steel bar 14 is a U-shaped steel bar. The opening of the U-shaped steel bar is fixed to the boss. The U-shaped steel bar crosses and overlaps with a pair of adjacent L-shaped steel bars, and is fixed by a vertically arranged sixth connecting steel bar 15. Among them, the surface of the first half cylinder at the edge of the main beam opposite to the surface where the first connecting steel bar 10 is provided is arranged as a plane, and the fifth connecting steel bar 14 is not provided.

[0034] To further improve the firmness of the connection, a ring-shaped steel bar 16 for connecting the fourth connecting steel bar 13 and the fifth connecting steel bar 14 is also provided in the filling space of the concrete reinforcement structure. The ring-shaped steel bar 16 is arranged in a crosswise manner with both the fourth connecting steel bar 13 and the fifth connecting steel bar 14, and is fixed to the fourth connecting steel bar 13 and the fifth connecting steel bar 14 through a vertically arranged sixth connecting steel bar 15.

[0035] To further improve the reliability of the connection, concrete reinforcement structures are poured in both the first connecting sleeve 6 and the second connecting sleeve 4. The concrete reinforcement structure is formed by pouring after the steel bar connection is completed.

[0036] To improve the firmness of the connection between the precast cover slab 1 and the main beam, a seventh connecting steel bar 17 is provided on the precast cover slab 1, and the precast cover slab 1 is connected to the steel bars on the main beam by binding the seventh connecting steel bar 17.

[0037] The precast beam segments 7, the first connecting sleeve 6, the second connecting sleeve 4, and the precast cover slab 1 are processed separately in the factory. The precast components are transported to the construction site, and a plurality of precast beam segments 7 are spliced and fixed longitudinally through the first connecting sleeve 6, and joint concrete is poured in the filling space 9, and longitudinal prestress is tensioned to form the first connecting beam segment 5. After the first connecting beam segment 5 is hoisted in place, the adjacent two first connecting beam segments 5 are fixed transversely through the second connecting sleeve 4, and joint concrete is poured in the filling space 9 to form the second connecting beam segment 3; at the same time, the adjacent two second connecting beam segments 3 are connected and fixed through the second connecting sleeve 4 to form the main beam. Then, the precast cover slab 1 is laid on the main beam, and the seventh connecting steel bar 17 of the precast cover slab 1 is bound to the steel bars on the main beam. Finally, the concrete of the bridge deck 2 is poured on the precast cover slab 1 to complete the assembly.

[0038] As an alternative implementation manner, the first connecting sleeve 6 and the second connecting sleeve 4 can also be integrally formed and connected to the precast beam segment 7 and the first connecting sleeve 6 from bottom to top. At this time, the L-shaped steel bar needs to be arranged vertically to avoid interference.

[0039] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. An assembled bridge, characterized in that, Including: A plurality of precast beam segments (7), adjacent two of the precast beam segments (7) are spliced and fixed longitudinally through a first connecting sleeve (6) to form a first connected beam segment (5); A second connecting sleeve (4), which fixes adjacent two of the first connected beam segments (5) transversely to form a second connected beam segment (3), and adjacent two second connected beam segments (3) are connected and fixed through the second connecting sleeve (4); A precast cover plate (1), which is laid on the main beam formed by assembling a plurality of the second connected beam segments (3); A bridge deck (2), which is laid on the precast cover plate (1); The first connecting sleeve (6) includes two first half cylinders spliced with each other transversely, and the bottoms of the two first half cylinders are fixed through a connecting member (8); At the top of the splicing surface of the first half cylinder, there is a first connecting steel bar (10), and at the top of the splicing surface of the precast beam segment (7), there is a second connecting steel bar (11), and the first connecting steel bar (10) and the second connecting steel bar (11) are cross-fixed; The second connecting sleeve (4) includes two second half cylinders spliced with each other longitudinally, and the two second half cylinders are spliced and fixed with two first half cylinders arranged back to back; On the splicing surface of the second half cylinder, a plurality of fourth connecting steel bars (13) are arranged at intervals, and on the splicing surfaces of the two first half cylinders arranged back to back, there is a fifth connecting steel bar (14), and the fourth connecting steel bar (13) and the fifth connecting steel bar (14) are cross-fixed.

2. The prefabricated bridge according to claim 1, wherein The first connecting steel bar (10) includes a pair of L-shaped steel bars arranged symmetrically, the second connecting steel bar (11) is a U-shaped steel bar, the pair of U-shaped steel bars cross each other, and are fixed to the L-shaped steel bars through a third connecting steel bar (12) arranged vertically.

3. The prefabricated bridge according to claim 1, characterized in that, A plurality of the fourth connecting steel bars (13) are L-shaped steel bars arranged symmetrically, the fifth connecting steel bar (14) is a U-shaped steel bar, and the fourth connecting steel bar (13) and the fifth connecting steel bar (14) are fixed through a sixth connecting steel bar (15) arranged vertically.

4. The prefabricated bridge according to claim 3, characterized in that, It further includes an annular steel bar (16) for connecting the fourth connecting steel bar (13) and the fifth connecting steel bar (14), the annular steel bar (16) is cross-arranged with both the fourth connecting steel bar (13) and the fifth connecting steel bar (14), and is fixed through the sixth connecting steel bar (15).

5. The prefabricated bridge according to any one of claims 1-4, characterized in that, Concrete reinforcement structures are cast in both the first connecting sleeve (6) and the second connecting sleeve (4).

6. The prefabricated bridge according to any one of claims 1-4, characterized in that, On the precast cover plate (1), there is a seventh connecting steel bar (17), and the precast cover plate (1) is connected to the main beam through the seventh connecting steel bar (17).

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