CN219671050U - Steel-concrete combined hollowed-out T-beam bridge structure - Google Patents

Abstract

The utility model provides a steel-concrete combined hollowed-out T-beam bridge structure, which comprises prefabricated steel-concrete combined T-beam units, wherein the prefabricated steel-concrete combined T-beam units are provided with a plurality of pieces, the middle sections of the bottoms of the prefabricated steel-concrete combined T-beam units are of arch structures, steel tie bars are arranged at the arch structures to form hollowed-out shapes, the beam ends of adjacent prefabricated steel-concrete combined T-beam units are connected through cast-in-place wet joints, the two ends of the adjacent prefabricated steel-concrete combined T-beam units are connected through end transverse partition plates, the middle sections are connected through span middle transverse partition plates, and cast-in-place concrete bridge panels are arranged on the prefabricated steel-concrete combined T-beam units. The T-shaped steel is embedded into the bottom of the concrete beam, and the steel teeth and the reinforcing steel bars of the cut section form a composite connecting tenon, so that the composite connecting tenon has higher fatigue resistance. Compared with the traditional large-scale prestressed concrete structure, the long and thin type of structure can be realized, the height of a concrete part beam is reduced in the midspan, the concrete consumption is saved, the hoisting weight is reduced, and the bearing capacity of the midspan section can be improved by increasing the steel tie bars.

Description

Steel-concrete combined hollowed-out T-beam bridge structure

Technical Field

The utility model relates to the technical field of bridge engineering, in particular to a steel-concrete combined hollowed-out T-beam bridge structure.

Background

The T-shaped beam bridge is most built on the highways in China, the early-stage T-shaped beams are mostly in reinforced concrete structures, the spans are mainly distributed at 7-20 m, and the reinforced concrete T-shaped beams are large in reinforcement distribution and easy to crack; along with the development of the prestress technology, a prestress concrete T beam is adopted gradually, and the span is usually 20-50 m. The prestressed concrete T-beam is easy to generate lateral bending in the process of tensioning the prestressed steel beam, and more construction measures are needed to ensure the stability of the beam body. After long-term use, the bottom plate and the web are easy to crack, and the durability of the beam body is affected.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model provides a steel-concrete combined hollowed-out T-beam bridge structure.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a steel and concrete combination fretwork T roof beam bridge structure, includes prefabricated steel and concrete combination T roof beam unit, prefabricated steel and concrete combination T roof beam unit is equipped with the multi-disc, and every piece prefabricated steel and concrete combination T roof beam unit is from top to bottom by the T type structure that precast concrete roof board and precast concrete web's concrete part constitutes, precast steel and concrete combination T roof beam unit bottom middle section is the arch structure, and arch structure department is equipped with the steel tie rod, and steel tie rod two sections are connected at arch structure both ends, form the fretwork form, connect through cast-in-place wet seam between the adjacent precast steel and concrete combination T roof beam unit roof beam end, connect through the end diaphragm between the adjacent precast steel and concrete combination T roof beam unit both ends, and the middle section is connected through crossing middle diaphragm, cast-in-place concrete bridge deck on the precast steel and concrete combination T roof beam unit.

The utility model further discloses the following technology:

preferably, wet joint connection steel bars are arranged in the precast concrete top plate, the wet joint connection steel bars of each precast reinforced concrete combined T beam unit are bound, and the wet joint is wrapped by the bound wet joint connection steel bars.

Preferably, the bottom of the precast concrete web is provided with a plurality of T-shaped steel sheets with steel teeth, wherein the middle section of one T-shaped steel sheet is of an arch structure, the T-shaped steel sheets are welded to form a steel skeleton, and the steel skeleton is embedded into the concrete part to form a composite connecting tenon.

Preferably, the composite connecting tenon consists of steel teeth, precast concrete webs and reinforcing steel bars;

the reinforcing steel bars comprise web constraint steel bars, transverse shear steel bars and beam bottom longitudinal through length steel bars, wherein the transverse shear steel bars are arranged in a concrete bridge deck, the beam bottom longitudinal through length steel bars are arranged in precast concrete webs, the web constraint steel bars are arranged in the precast concrete webs, the lower ends of the web constraint steel bars are connected with the beam bottom longitudinal through length steel bars, and the tops of the web constraint steel bars penetrate through the precast concrete top plate to extend into the concrete bridge deck and are connected with the transverse shear steel bars.

The beneficial effects of the utility model are as follows:

by improving the traditional prestressed concrete T-beam structure and combining the characteristics of the reinforced concrete composite beam bridge, a brand new reinforced concrete composite hollowed-out T-beam bridge structure is created, and the traditional shear connectors such as shear nails, channel steel and the like are replaced by creatively adopting a composite connecting tenon structure. And constraint steel bars are arranged at the positions of the composite connecting tenons, so that prying faults below the composite connecting tenons are effectively prevented, and the ductility and the bearing performance of the main beam are ensured. Has good technical and economic superiority, and is a structure form easy to popularize.

The steel-concrete combined hollowed-out T-beam bridge structure does not need to be provided with prestressed steel bundles, so that the section of the concrete web plate is lighter and thinner, and the concrete consumption is saved; the traditional T-shaped section template can be used for manufacturing, so that special templates are not required to be produced, and the production cost can be reduced; the prefabricated steel-concrete combined T beam unit is prefabricated in a standardized mode in a factory, is transported to the site, is light in installation weight, and can be installed rapidly by means of common hoisting equipment.

The steel-concrete combined hollowed-out T-beam bridge structure accords with the characteristics of industrial construction, has the advantages of design standardization, production industrialization and assembly mechanization, has the advantages of energy conservation and environmental protection, and is a development direction and trend of the construction industry in the future.

Drawings

The utility model will be further described in detail with reference to the drawings required in the description, so that the technical means, the creation characteristics, the achievement of the objects and the effects of the utility model can be easily understood. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a schematic view of a prefabricated reinforced concrete composite T-beam unit of the present utility model;

FIG. 3 is a schematic view of a rolled H-section according to the utility model;

FIG. 4 is a schematic view of a section steel skeleton of the present utility model;

FIG. 5 is a schematic cross-sectional view of an end pivot point of the present utility model;

FIG. 6 is a schematic cross-sectional view of the present utility model;

FIG. 7 is a schematic view of a cross-sectional reinforcement of the present utility model;

FIG. 8 is a schematic view of a composite connecting tongue according to the present utility model;

the numbers in the figures are: the concrete composite T beam comprises a 1-steel-concrete composite T beam unit, 2-steel tie bars, 3-cast-in-situ wet joints, 4-concrete bridge decks, 5-rolled H-shaped steel, 6-T-shaped steel, 7-shaped steel frameworks, 8-steel teeth, 9-composite connecting tenons, 10-precast concrete webs, 11-precast concrete top plates, 12-web constraint steel bars, 13-transverse shear steel bars, 14-beam bottom longitudinal through length steel bars, 15-wet joint connection steel bars, 16-span middle transverse partition plates and 17-end transverse partition plates.

Detailed Description

The present utility model will be described in further detail with reference to the following examples, so that the technical means, the creation characteristics, the achievement of the purpose and the effect achieved by the present utility model can be easily understood. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

As shown in fig. 1-5. The utility model provides a steel and concrete combination fretwork T roof beam bridge structure, includes prefabricated steel and concrete combination T roof beam unit, prefabricated steel and concrete combination T roof beam unit is equipped with the multichip, prefabricated steel and concrete combination T roof beam unit bottom middle section is the arch structure, and arch structure department is equipped with steel tie rod 2, and steel tie rod 2 two sections are connected at arch structure both ends, form the fretwork form, connect through cast-in-place wet seam 3 between the adjacent prefabricated steel and concrete combination T roof beam unit beam end, connect through end diaphragm 17 between the adjacent prefabricated steel and concrete combination T roof beam unit both ends, and the middle section is connected through crossing middle diaphragm 16, and cast-in-place concrete bridge deck 4 on the prefabricated steel and concrete combination T roof beam unit. The concrete bridge deck 4 and the cast-in-situ wet joint 3 connect the transverse multi-piece precast reinforced concrete combined T beam units into a whole.

Each prefabricated steel-concrete combined T beam unit is of a T-shaped structure formed by a prefabricated concrete top plate 11 and a concrete part of a prefabricated concrete web 10 from top to bottom;

wet joint connection steel bars 15 are arranged in the precast concrete top plate 11, the wet joint connection steel bars 15 of each precast reinforced concrete combined T-beam unit are bound, and the wet joint is wrapped by the bound wet joint connection steel bars 15.

The bottom of the precast concrete web 10 is provided with a plurality of T-shaped steel with steel teeth, rolled H-shaped steel is cut through a cutting process to form two T-shaped steel with steel teeth 8, the T-shaped steel is divided according to the design length, one of the divided T-shaped steel is designed into an arch structure according to the design linearity, the edge and the surface are polished and then subjected to corrosion prevention treatment, and finally the divided T-shaped steel is welded according to the design linearity to form the steel skeleton 7. The section steel framework 7 is embedded into the concrete part to form a composite connecting tenon 9.

The composite connecting tenon 9 consists of steel teeth 8, precast concrete webs 10 and reinforcing steel bars; the steel teeth 8 are the top end parts of T-shaped steel and are inserted into the precast concrete webs 10;

the reinforcing steel bars comprise web constraint steel bars 12, transverse shear steel bars 13 and beam bottom longitudinal through length steel bars 14, wherein the transverse shear steel bars 13 are arranged in the concrete bridge deck 4, the beam bottom longitudinal through length steel bars 14 are arranged in the precast concrete webs 10, the web constraint steel bars 12 are arranged in the precast concrete webs 10, the lower ends of the web constraint steel bars are connected with the beam bottom longitudinal through length steel bars 14, and the tops of the web constraint steel bars penetrate through the precast concrete roof 11 to extend into the concrete bridge deck 4 and are connected with the transverse shear steel bars 13.

The T-shaped steel is embedded into the bottom of the concrete beam, and the steel teeth 8 and the reinforcing steel bars of the cut section form the composite connecting tenons 9, so that the composite connecting tenons have higher fatigue resistance. Compared with the traditional large-scale prestressed concrete structure, the structure type can be slender, has high bearing capacity and high rigidity, and the beam has small deflection due to the high bearing capacity and enough rigidity, and has good stress performance. The beam height of the concrete part is reduced in the midspan, the concrete consumption is saved, the hoisting weight is reduced, and the bearing capacity of the midspan section can be improved by increasing the steel tie bars 2.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (4)

1. A steel-concrete combined hollowed-out T-beam bridge structure is characterized in that: the prefabricated reinforced concrete composite T beam unit comprises a plurality of prefabricated reinforced concrete composite T beam units, wherein each prefabricated reinforced concrete composite T beam unit is provided with a T-shaped structure formed by a prefabricated concrete top plate and a concrete part of a prefabricated concrete web plate from top to bottom, the middle section of the bottom of the prefabricated reinforced concrete composite T beam unit is of an arch structure, a steel tie rod is arranged at the arch structure, two sections of the steel tie rod are connected at two ends of the arch structure to form a hollowed-out shape, the beam ends of adjacent prefabricated reinforced concrete composite T beam units are connected through cast-in-situ wet joints, the two ends of the adjacent prefabricated reinforced concrete composite T beam units are connected through end transverse partition plates, the middle section is connected through a span middle transverse partition plate, and a cast-in-situ concrete bridge deck is arranged on the prefabricated reinforced concrete composite T beam units.

2. The steel-concrete combined hollowed-out T-beam bridge structure according to claim 1, wherein: wet joint connecting steel bars are arranged in the precast concrete top plate, the wet joint connecting steel bars of the precast reinforced concrete combined T-beam units are bound, and the wet joint is wrapped with the bound wet joint connecting steel bars.

3. The steel-concrete combined hollowed-out T-beam bridge structure according to claim 2, wherein: the bottom of the precast concrete web is provided with a plurality of T-shaped steel sheets with steel teeth, wherein the middle section of one T-shaped steel sheet is of an arch structure, a plurality of T-shaped steel sheets are welded to form a steel skeleton, and the steel skeleton is embedded into a concrete part to form a composite connecting tenon.

4. A steel-concrete composite hollowed-out T-beam bridge structure according to claim 3, wherein: the composite connecting tenon consists of steel teeth, precast concrete webs and reinforcing steel bars;

the reinforcing steel bars comprise web constraint steel bars, transverse shear steel bars and beam bottom longitudinal through length steel bars, wherein the transverse shear steel bars are arranged in a concrete bridge deck, the beam bottom longitudinal through length steel bars are arranged in precast concrete webs, the web constraint steel bars are arranged in the precast concrete webs, the lower ends of the web constraint steel bars are connected with the beam bottom longitudinal through length steel bars, and the tops of the web constraint steel bars penetrate through the precast concrete top plate to extend into the concrete bridge deck and are connected with the transverse shear steel bars.