CN111424546A - Inverted T-shaped steel beam-concrete combined beam structure of small and medium-span bridge and construction method - Google Patents

Inverted T-shaped steel beam-concrete combined beam structure of small and medium-span bridge and construction method Download PDF

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Publication number
CN111424546A
CN111424546A CN201910023783.8A CN201910023783A CN111424546A CN 111424546 A CN111424546 A CN 111424546A CN 201910023783 A CN201910023783 A CN 201910023783A CN 111424546 A CN111424546 A CN 111424546A
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CN
China
Prior art keywords
inverted
shaped steel
concrete
steel beam
concrete combined
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Pending
Application number
CN201910023783.8A
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Chinese (zh)
Inventor
张强
马晓刚
李京
孔令熙
王天翔
张维戈
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Shanghai Pudong Architectural Design & Research Institute Co ltd
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Shanghai Pudong Architectural Design & Research Institute Co ltd
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Application filed by Shanghai Pudong Architectural Design & Research Institute Co ltd filed Critical Shanghai Pudong Architectural Design & Research Institute Co ltd
Priority to CN201910023783.8A priority Critical patent/CN111424546A/en
Publication of CN111424546A publication Critical patent/CN111424546A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/12Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
    • E01D19/125Grating or flooring for bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/20Concrete, stone or stone-like material
    • E01D2101/24Concrete
    • E01D2101/26Concrete reinforced
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/20Concrete, stone or stone-like material
    • E01D2101/24Concrete
    • E01D2101/26Concrete reinforced
    • E01D2101/268Composite concrete-metal
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/20Concrete, stone or stone-like material
    • E01D2101/24Concrete
    • E01D2101/26Concrete reinforced
    • E01D2101/28Concrete reinforced prestressed

Abstract

The invention relates to an inverted T-shaped steel beam-concrete combined beam structure of a middle and small span bridge and a construction method thereof, wherein the inverted T-shaped steel beam-concrete combined beam structure consists of a plurality of single inverted T-shaped steel beams-concrete combined beams which are arranged in parallel, the single inverted T-shaped steel beam-concrete combined beams are prefabricated in a factory and comprise inverted T-shaped steel beams (1) and reinforced concrete plates (2) arranged on the inverted T-shaped steel beams (1), adjacent single or multiple inverted T-shaped steel beams-concrete combined beams are connected through reinforced concrete plates (3) poured in situ, end beam prefabricated sections (5) are arranged at the end parts of the single or multiple inverted T-shaped steel beams-concrete combined beams, and the adjacent end beam prefabricated sections (5) are connected through end beam cast-in-place sections (4) poured in situ. Compared with the prior art, the invention has simple structure, simple steel beam manufacture and convenient processing; good mechanical property, convenient construction, fast construction speed and economic cost.

Description

Inverted T-shaped steel beam-concrete combined beam structure of small and medium-span bridge and construction method
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to an inverted T-shaped steel beam-concrete combined beam structure of a middle-small span bridge and a construction method.
Background
At present, the middle and small span bridges generally adopt the structural forms of precast concrete hollow slab beams, small box beams, T beams, steel-concrete composite beams and the like, the hollow slab beams, the small box beams and the T beams are transversely divided into a plurality of beams, each beam is manufactured in a factory, the site construction is simple and convenient, the conventional steel-concrete composite beams generally comprise steel beams, concrete bridge decks and anti-shearing connecting pieces, the steel beams are convenient to construct, the construction modes of factory prefabrication and site hoisting can be adopted, the concrete bridge decks are generally divided into a plurality of types of cast-in-place bridge decks, precast bridge decks, laminated bridge decks and the like, the anti-shearing connecting pieces can be manufactured in a factory or installed in a site, and steel and concrete need to be connected in the site no matter which mode is adopted, and the workload is larger. If the steel-concrete beam is manufactured in a factory in a block mode, the construction process is greatly simplified, the construction period is shortened, and meanwhile if the welding workload of the steel beam is reduced, the structure performance is better, and the manufacturing and mounting cost is lower.
Chinese patent CN108342973A discloses an entire span prefabricated H-shaped steel-concrete combined beam bridge and a construction method, wherein the combined beam bridge comprises an H-shaped steel combination and a concrete bridge road slab poured on the H-shaped steel combination, the H-shaped steel combination comprises H-shaped steel which is arranged in parallel along the bridge width direction, and the H-shaped steel is the entire span length along the length direction. The steel beam is of the inverted T shape, can be divided into two by section steel cutting, can also be formed by welding steel plates, does not have an upper flange plate and a shear nail, and does not need to be provided with stiffening ribs and cross ribs simultaneously, so that the steel consumption is more saved, the end cross beam adopts a prestressed concrete structure, and the durability is better.
Disclosure of Invention
The invention aims to solve the problems and provides an inverted T-shaped steel beam-concrete combined beam structure of a middle-small span bridge and a construction method, which have the advantages of simple structure, good mechanical property and quick construction.
The purpose of the invention is realized by the following technical scheme:
the inverted T-shaped steel beam-concrete combined beam structure of the small and medium-span bridge is composed of a plurality of single inverted T-shaped steel beam-concrete combined beams which are arranged in parallel, wherein the single or multiple inverted T-shaped steel beam-concrete combined beams are prefabricated in a factory and comprise inverted T-shaped steel beams and reinforced concrete plates arranged on the inverted T-shaped steel beams, adjacent single or multiple inverted T-shaped steel beam-concrete combined beams are connected through the reinforced concrete plates poured in situ, end beam prefabricated sections are arranged at the end parts of the single or multiple inverted T-shaped steel beam-concrete combined beams, and the adjacent end beam prefabricated sections are connected through end beam cast-in-place sections poured in situ.
Further, the inverted T-shaped steel beam is obtained by cutting H-shaped steel into two parts, and can also be formed by welding steel plates, and holes are formed in the upper end of a web plate.
Further, the holes are penetrated with steel bars as shear connectors.
Furthermore, the prefabricated section of the end beam is of a prestressed concrete structure.
Further, the inverted T-shaped steel beam bottom plate is provided with shear nails.
Further, the reinforced concrete slab is a cast-in-place wet-joint bridge deck slab.
Furthermore, the span range of the inverted T-shaped steel beam-concrete combined beam structure is 16-40 m, and the height-span ratio is 1/25.
Further, the end of the inverted T-shaped steel beam-concrete combined beam structure is provided with prestressed steel bars.
A construction method of an inverted T-shaped steel beam-concrete combined beam structure of a middle and small span bridge comprises the following steps:
(a) symmetrically cutting H-shaped steel into two parts in a factory to prepare an inverted T-shaped steel beam, or welding the H-shaped steel into two parts by adopting steel plates, and forming holes in a web plate;
(b) fixing the inverted T-shaped steel beam, penetrating a steel bar at the position of the opening, installing a template, binding the steel bar, and pouring a concrete slab to form a single-piece or multi-piece inverted T-shaped steel beam-concrete combined beam;
(c) in the construction site of the bridge, hoisting a single piece or a plurality of pieces of inverted T-shaped steel beam-concrete combined beams in place, carrying out formwork hoisting construction, binding reinforcing steel bars of a cast-in-place section, pouring a reinforced concrete slab, pouring a cast-in-place section of an end cross beam, and finally forming an inverted T-shaped steel beam-concrete combined beam structure.
The invention has the beneficial effects that: the structure is simple, the inverted T-shaped steel beam is simple to manufacture and convenient to process; the mechanical property is good, and the material characteristics of steel tensile strength and concrete compression resistance can be fully exerted; the construction is convenient, the single or multiple inverted T-shaped steel beams and the concrete are integrally manufactured in a factory, and after the inverted T-shaped steel beams and the concrete are transported to the site, the inverted T-shaped steel beam-concrete combined structure can be directly spliced and assembled, so that the construction speed is high, and the construction cost is economic.
Drawings
FIG. 1 is a perspective view of an inverted T-shaped steel beam-concrete composite beam structure according to the present invention;
FIG. 2 is a structural view of a prefabricated single-piece inverted T-shaped steel beam-concrete composite beam;
FIG. 3 is a structural view of a prefabricated multi-piece inverted T-shaped steel beam-concrete composite beam;
FIG. 4 is a structural view of wet joint splicing of an inverted T-shaped steel beam-concrete composite beam bridge deck;
FIG. 5 is a structural view of an inverted T-shaped steel beam-concrete composite beam prefabricated at an end cross beam;
FIG. 6 is a structural view of the splicing of two inverted T-beam-concrete composite beams at the end beams;
FIG. 7 is an inverted T-beam web opening.
In the attached drawings, 1-inverted T steel beam, 2-reinforced concrete slab, 3-reinforced concrete slab, 4-end beam cast-in-place section, 5-end beam prefabricated section, 6-hole opening, 7-steel bar and 8-prestressed steel bar.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Examples
Referring to fig. 1-7, the inverted T-shaped steel beam-concrete combined beam structure of the small and medium-span bridge comprises a plurality of single inverted T-shaped steel beam-concrete combined beams which are arranged in parallel, wherein the single or multiple inverted T-shaped steel beam-concrete combined beams are prefabricated in a factory and comprise inverted T-shaped steel beams 1 and reinforced concrete plates 2 arranged on the inverted T-shaped steel beams 1, adjacent single or multiple inverted T-shaped steel beam-concrete combined beams are connected through reinforced concrete plates 3 poured in place, end beam prefabricated sections 5 are arranged at the end parts of the single or multiple inverted T-shaped steel beam-concrete combined beams, and the adjacent end beam prefabricated sections 5 are connected through end beam cast-in-place sections 4 poured in place. The inverted T-shaped steel beam 1 is provided with a hole 6 in a web plate, a steel bar 7 serving as a shear connector penetrates through the hole 6, the end beam prefabricated section 5 is of a prestressed concrete structure, a shear nail is arranged on a bottom plate of the inverted T-shaped steel beam 1, the reinforced concrete slab 3 is a cast-in-place wet-connection section bridge deck plate, the suitable span range of the inverted T-shaped steel beam-concrete combined beam structure is 16-40 m, and the high span ratio is 1/25. The end of the inverted T-shaped steel beam-concrete combined beam structure is provided with prestressed steel bars 8.
During construction, the method comprises the following steps:
(a) the H-shaped steel is symmetrically divided into two parts in the vertical direction in a factory to prepare an inverted T-shaped steel beam, or the steel plates are welded to form the inverted T-shaped steel beam, and holes are formed in a web plate;
(b) fixing the inverted T-shaped steel beam, penetrating a steel bar at the position of the opening, installing a template, binding the steel bar, and pouring a concrete slab to form a single inverted T-shaped steel beam-concrete combined beam;
(c) in the construction site of the bridge, hoisting a single piece or a plurality of pieces of inverted T-shaped steel beam-concrete combined beams in place, carrying out formwork hoisting construction, binding reinforcing steel bars at a cast-in-place section, pouring a reinforced concrete slab 3, and pouring an end beam cast-in-place section 4 to finally form an inverted T-shaped steel beam-concrete combined beam structure.
The inverted T-shaped steel beam-concrete combined beam structure manufactured by adopting the technical scheme provided by the invention has the characteristics of simple structure, good mechanical property and quick construction.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims (9)

1. The inverted T-shaped steel beam-concrete combined beam structure of the small and medium-span bridge is characterized in that the single inverted T-shaped steel beam-concrete combined beam structure is obtained by prefabricating in a factory and comprises an inverted T-shaped steel beam (1) and reinforced concrete plates (2) arranged on the inverted T-shaped steel beam (1), adjacent single or multiple inverted T-shaped steel beam-concrete combined beams are connected through the reinforced concrete plates (3) poured in situ, end cross beam prefabricated sections (5) are arranged at the end parts of the single or multiple inverted T-shaped steel beam-concrete combined beams, and the adjacent end cross beam prefabricated sections (5) are connected through end cross beam cast-in-place sections (4) poured in situ.
2. The inverted-T steel beam-concrete composite beam structure of the small and medium-span bridge as claimed in claim 1, wherein the inverted-T steel beam (1) is obtained by cutting H-shaped steel into two parts, or is formed by welding steel plates, and has a hole (6) formed at the upper end of a web.
3. The inverted-T steel girder-concrete composite beam structure of a middle and small span bridge according to claim 2, wherein the holes (6) are penetrated with reinforcing bars (7) as shear connectors.
4. The inverted-T steel beam-concrete composite beam structure of a middle and small span bridge according to claim 1, wherein the end beam prefabricated section (5) is a prestressed concrete structure.
5. The inverted-T steel beam-concrete combined beam structure of the small and medium-span bridge according to claim 1, characterized in that shear nails are arranged on a bottom plate of the inverted-T steel beam (1).
6. The inverted-T steel beam-concrete composite beam structure of the small and medium-span bridge as claimed in claim 1, wherein the reinforced concrete slab (3) is a cast-in-place wet-jointed bridge deck slab.
7. The inverted-T steel beam-concrete combined beam structure of the small and medium-span bridge as claimed in claim 1, wherein the span range of the inverted-T steel beam-concrete combined beam structure is 16-40 m, and the high span ratio is 1/25.
8. The inverted-T steel beam-concrete composite beam structure of the small and medium-span bridge according to claim 1, wherein the inverted-T steel beam-concrete composite beam structure is provided with prestressed reinforcements (8) at the ends.
9. The construction method of the inverted T-shaped steel beam-concrete combined beam structure of the small and medium-span bridge as claimed in any one of claims 1 to 8, characterized by comprising the following steps:
(a) the method comprises the following steps of cutting H-shaped steel into two parts in a factory to obtain an inverted T-shaped steel beam, or welding steel plates to form the inverted T-shaped steel beam, and forming a hole at the upper end of a web plate;
(b) fixing the inverted T-shaped steel beam, penetrating a steel bar at the position of the opening, installing a template, binding the steel bar, and pouring a concrete slab to form a single-piece or multi-piece inverted T-shaped steel beam-concrete combined beam;
(c) in a bridge construction site, hoisting a single piece or a plurality of pieces of inverted T-shaped steel beam-concrete combined beams in place, performing formwork hoisting construction, binding reinforcing steel bars of a cast-in-place section, pouring a reinforced concrete slab (3), and pouring an end beam cast-in-place section (4) to finally form an inverted T-shaped steel beam-concrete combined beam structure.
CN201910023783.8A 2019-01-10 2019-01-10 Inverted T-shaped steel beam-concrete combined beam structure of small and medium-span bridge and construction method Pending CN111424546A (en)

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Application Number Priority Date Filing Date Title
CN201910023783.8A CN111424546A (en) 2019-01-10 2019-01-10 Inverted T-shaped steel beam-concrete combined beam structure of small and medium-span bridge and construction method

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Application Number Priority Date Filing Date Title
CN201910023783.8A CN111424546A (en) 2019-01-10 2019-01-10 Inverted T-shaped steel beam-concrete combined beam structure of small and medium-span bridge and construction method

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113215959A (en) * 2021-05-15 2021-08-06 石家庄铁道大学 Shear-resistant connecting member for steel-concrete composite beam
CN113832826A (en) * 2021-10-09 2021-12-24 南京理工大学 Prestressed concrete slab beam bridge type and construction method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113215959A (en) * 2021-05-15 2021-08-06 石家庄铁道大学 Shear-resistant connecting member for steel-concrete composite beam
CN113832826A (en) * 2021-10-09 2021-12-24 南京理工大学 Prestressed concrete slab beam bridge type and construction method thereof

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