CN114541249B - Steel-concrete combined beam crossing railway business line and construction method - Google Patents
Steel-concrete combined beam crossing railway business line and construction method Download PDFInfo
- Publication number
- CN114541249B CN114541249B CN202210327485.XA CN202210327485A CN114541249B CN 114541249 B CN114541249 B CN 114541249B CN 202210327485 A CN202210327485 A CN 202210327485A CN 114541249 B CN114541249 B CN 114541249B
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- steel
- steel box
- concrete
- box girder
- panel
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- 238000010276 construction Methods 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 92
- 239000010959 steel Substances 0.000 claims abstract description 92
- 230000001681 protective effect Effects 0.000 claims abstract description 15
- 238000009415 formwork Methods 0.000 claims abstract description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000011065 in-situ storage Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009432 framing Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
- E01D19/103—Parapets, railings ; Guard barriers or road-bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Abstract
A steel-concrete combined beam for crossing railway business lines and a construction method thereof. The steel-concrete combined beam comprises a steel box beam, a steel flange, an integral concrete top plate and a protective structure; the steel-concrete combined beam for the overseas railway business line and the construction method thereof have the following beneficial effects: 1. the steel-concrete combined beam is in a steel box beam and steel flange structure form, steel flanges are additionally arranged on two sides of the steel box beam, the steel flanges and the steel box beam are synchronously processed and molded in a factory, transported to the site, and synchronously hoisted in place in combination with the site situation. The steel flange has the functions of supporting the formwork and protecting the formwork, and can effectively form a whole with the integral concrete roof to bear upper load together, so that the structure is firmer and more stable. 2. The steel box girder and the steel flange are hoisted in place at one time, and a bracket is not required to be arranged on site, so that the influence on an operation railway or a highway is reduced, the construction is simple, the efficiency is high, the operation is convenient, and the cost is saved.
Description
Technical Field
The invention belongs to the technical field of railway and highway bridge engineering, and particularly relates to a steel-concrete combined beam crossing over a railway business line and a construction method thereof.
Background
Along with the continuous improvement of bridge construction technology, the steel-concrete combined beam has been widely applied to railway and highway bridges due to the advantages of high rigidity, excellent material characteristics, convenient and quick construction and the like. The traditional steel-concrete combined beam mainly comprises a steel box beam, a concrete top plate arranged at the top of the steel box beam and concrete flange plates positioned at two sides of the concrete top plate; the construction method comprises the steps of firstly hoisting a factory prefabricated steel box girder in place by constructors on site, then erecting a full framing or a triangular bracket according to site conditions, then installing a concrete top plate and a concrete flange plate template, binding steel bars in the template, pouring concrete in the template, and dismantling the template and the full framing or the triangular bracket after the concrete is solidified and reaches design strength to manufacture the concrete top plate and the concrete flange plate. However, this construction method has the following problems: the method is only suitable for the conditions of wide places, upward crossing of planned roads or roads, closed traffic of railways and the like, but has larger influence on railway business lines and roads, high safety risk, high cost and low construction efficiency under the condition that upward crossing bridges and underlying railway business lines and roads are in the same direction and cannot be closed.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a steel-concrete combined beam crossing a railway business line and a construction method thereof.
In order to achieve the above purpose, the steel-concrete combined beam of the overstock railway business line provided by the invention comprises a steel box girder, a steel flange, an integral concrete top plate and a protective structure; wherein, two steel flanges are respectively connected to the upper parts of two sides of the steel box girder, and each steel flange comprises a panel, a bracket girder and a reinforcing rib; the inner side edge of the panel is connected to the upper end of the side face of the steel box girder, and the outer side extends upwards to form an edge; the bracket beams are transversely arranged along the steel box beams, the upper ends of the bracket beams are arranged on the bottom surface of the panel at intervals along the longitudinal direction of the panel, and the inner ends of the bracket beams are connected to the upper parts of the side surfaces of the steel box beams; the reinforcing ribs are arranged along the longitudinal direction of the steel box girder, and the lower ends of the reinforcing ribs are arranged on the top surface of the panel at intervals along the transverse direction of the panel; the integral concrete top plate is formed on the top of the steel box girder and the panel of the steel flange in a cast-in-place manner; the lower end of the protective structure is fixed at the outer edge of the steel flange.
The protective structure comprises a railing and a closed aluminous gusset plate, wherein the closed aluminous gusset plate is installed at the outer side part of the railing on site; the height of the railing is 1.2 meters, and the height of the enclosed aluminous gusset plate is 1.5 meters.
And the steel box girder is filled with concrete for counterweight.
The construction method of the steel-concrete combined beam for the overstock railway business line provided by the invention comprises the following steps in sequence:
1) Firstly, respectively manufacturing a steel box girder and steel flanges in a processing plant by workers, and then respectively connecting the two steel flanges at the upper parts of two sides of the steel box girder;
2) Fixing the lower end of the upper railing of the protective structure at the outer side part of the steel flange;
3) After the lower structure of the railway or highway bridge and the rubble concrete reach 75% of the design strength, carrying out on-site hoisting operation of the assembly formed by the steel box girder, the steel flange and the railing in the construction skylight period;
4) Immediately installing a closed aluminous gusset plate at the outer side part of the railing after hoisting in place so as to fully seal the protective railing at two sides;
5) Grouting the support on the railway or highway bridge, and pouring the concrete for the weight distribution into the steel box girder from the pouring hole at the top after the strength of the support reaches 100%;
6) And (3) carrying out formwork support and reinforcement binding of the integral concrete top plate on the top of the steel box girder and the panel of the steel flange, then pouring concrete in the formwork, and dismantling the formwork after the concrete is solidified and reaches the designed strength to form the integral concrete top plate, thereby forming a more stable structural system.
The steel-concrete combined beam for the overseas railway business line and the construction method thereof have the following beneficial effects:
1. the steel-concrete combined beam is in a steel box beam and steel flange structure form, steel flanges are additionally arranged on two sides of the steel box beam, the steel flanges and the steel box beam are synchronously processed and molded in a factory, transported to the site, and synchronously hoisted in place in combination with the site situation. The steel flange has the functions of supporting the formwork and protecting the formwork, and can effectively form a whole with the integral concrete roof to bear upper load together, so that the structure is firmer and more stable.
2. The steel box girder and the steel flange are hoisted in place at one time, and a bracket is not required to be arranged on site, so that the influence on an operation railway or a highway is reduced, the construction is simple, the efficiency is high, the operation is convenient, and the cost is saved.
Drawings
Fig. 1 is a schematic view of a transverse cross section of a steel-concrete girder of the present invention.
Fig. 2 is a plan view of the steel-concrete composite girder provided by the invention.
Fig. 3 is a flow chart of a construction method of the steel-concrete beam.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
As shown in fig. 1-2, the steel-concrete combined beam for the overstock railway business line provided by the invention comprises a steel box girder 1, a steel flange 2, an integral concrete top plate 3 and a protective structure 4; wherein, two steel flanges 2 are respectively connected to the upper parts of two sides of the steel box girder 1, each steel flange 2 comprises a panel 5, a bracket girder 6 and a reinforcing rib 7; the inner side edge of the panel 5 is connected to the upper end of the side surface of the steel box girder 1, and the outer side extends upwards to form an edge; the bracket beams 6 are arranged along the transverse direction of the steel box beam 1, the upper ends of the bracket beams 6 are arranged on the bottom surface of the panel 5 at intervals along the longitudinal direction of the panel 5, and the inner ends of the bracket beams 6 are connected to the upper part of the side surface of the steel box beam 1; the reinforcing ribs 7 are arranged along the longitudinal direction of the steel box girder 1, and the lower ends of the plurality of reinforcing ribs 7 are arranged on the top surface of the panel 5 at intervals along the transverse direction of the panel 5; the integral concrete top plate 3 is formed on the top of the steel box girder 1 and the panel 5 of the steel flange 2 in a cast-in-place manner; the lower end of the protective structure 4 is fixed to the outer edge of the steel flange 2.
The protective structure 4 comprises a railing 8 and a closed aluminous gusset plate, wherein the closed aluminous gusset plate is installed at the outer side part of the railing 8 on site; the height of the railing 8 is 1.2 meters, and the height of the enclosed aluminous gusset plate is 1.5 meters.
The steel box girder 1 is filled with concrete for counterweight.
As shown in fig. 3, the construction method of the steel-concrete beam for the overseas railway business line provided by the invention comprises the following steps in sequence:
1) Firstly, respectively manufacturing a steel box girder 1 and steel flanges 2 in a processing plant by workers, and then respectively connecting the two steel flanges 2 at the upper parts of two sides of the steel box girder 1;
2) The lower end of a rail 8 on the protective structure 4 is fixed at the outer side part of the steel flange 2;
3) After the lower structure of the railway or highway bridge and the rubble concrete reach 75% of the design strength, carrying out on-site hoisting operation of the assembly formed by the steel box girder 1, the steel flange 2 and the railing 8 in the construction skylight period;
4) Immediately installing a closed aluminous gusset plate at the outer side part of the railing 8 after hoisting in place so as to fully seal the protective railing 8 at two sides;
5) Grouting of the support on the railway or highway bridge is started, and after the strength of the support reaches 100%, pouring concrete for weight distribution into the steel box girder 1 from the pouring hole at the top;
6) And (3) carrying out formwork support and reinforcement binding of the integral concrete top plate 3 on the top of the steel box girder 1 and the panel 5 of the steel flange 2, then pouring concrete in the formwork, and dismantling the formwork after the concrete is solidified and reaches the designed strength to form the integral concrete top plate 3, thereby forming a more stable structural system.
Claims (1)
1. The construction method of the steel-concrete combined beam of the overstock railway business line comprises a steel box beam (1), a steel flange (2), an integral concrete top plate (3) and a protective structure (4); wherein, two steel flanges (2) are respectively connected to the upper parts of two sides of the steel box girder (1), each steel flange (2) comprises a panel (5), a bracket girder (6) and a reinforcing rib (7); the inner side edge of the panel (5) is connected with the upper end of the side face of the steel box girder (1), and the outer side extends upwards to form an edge; the bracket beams (6) are transversely arranged along the steel box beam (1), the upper ends of the bracket beams (6) are arranged on the bottom surface of the panel (5) at intervals along the longitudinal direction of the panel (5), and meanwhile, the inner ends of the bracket beams (6) are connected to the upper part of the side surface of the steel box beam (1); the reinforcing ribs (7) are arranged along the longitudinal direction of the steel box girder (1), and the lower ends of the plurality of reinforcing ribs (7) are arranged on the top surface of the panel (5) at intervals along the transverse direction of the panel (5); the integral concrete top plate (3) is formed on the top of the steel box girder (1) and the panel (5) of the steel flange (2) in an in-situ pouring mode; the lower end of the protective structure (4) is fixed at the outer edge of the steel flange (2);
the method is characterized in that: the construction method comprises the following steps in sequence:
1) Firstly, respectively manufacturing a steel box girder (1) and steel flanges (2) in a processing plant by workers, and then respectively connecting the two steel flanges (2) at the upper parts of two sides of the steel box girder (1);
2) The lower end of an upper railing (8) of the protective structure (4) is fixed at the outer side part of the steel flange (2);
3) After the lower structure of the railway or highway bridge and the rubble concrete reach 75% of the design strength, carrying out on-site hoisting operation of the assembly formed by the steel box girder (1), the steel flange (2) and the railing (8) in the construction skylight period;
4) After being lifted in place, the outside part of the railing (8) is immediately provided with a closed aluminous gusset plate so as to fully seal the protective railing (8) at two sides;
5) Grouting of the support on the railway or highway bridge is started, and after the strength of the support reaches 100%, pouring concrete for weight distribution into the steel box girder (1) from the pouring hole at the top;
6) And (3) carrying out formwork support and reinforcement binding of the integral concrete top plate (3) on the top of the steel box girder (1) and the panel (5) of the steel flange (2), then pouring concrete in the formwork, and dismantling the formwork after the concrete is solidified and reaches the designed strength to form the integral concrete top plate (3), thereby forming a more stable structural system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210327485.XA CN114541249B (en) | 2022-03-30 | 2022-03-30 | Steel-concrete combined beam crossing railway business line and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210327485.XA CN114541249B (en) | 2022-03-30 | 2022-03-30 | Steel-concrete combined beam crossing railway business line and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114541249A CN114541249A (en) | 2022-05-27 |
| CN114541249B true CN114541249B (en) | 2024-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210327485.XA Active CN114541249B (en) | 2022-03-30 | 2022-03-30 | Steel-concrete combined beam crossing railway business line and construction method |
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| Country | Link |
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| CN (1) | CN114541249B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008121288A (en) * | 2006-11-13 | 2008-05-29 | Fuji Ps Corp | Continuous steel plate web bridge and method of constructing continuous steel plate web bridge |
| CN102220741A (en) * | 2011-04-14 | 2011-10-19 | 中铁二十局集团第六工程有限公司 | Steel-concrete composite girder construction technology striding current lines and being parallel to existing lines |
| CN104831635A (en) * | 2015-05-26 | 2015-08-12 | 中铁二十二局集团第三工程有限公司 | Combined H-shaped steel cast-in-situ box beam support adjoining to and overpassing existing lines |
| CN108222051A (en) * | 2018-03-23 | 2018-06-29 | 中铁二院工程集团有限责任公司 | A kind of contact net upright post basic of railway steel reinforced concrete bondbeam and steel reinforced concrete combination bridge |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EA037464B1 (en) * | 2018-04-11 | 2021-03-31 | Велайсами Тавамани Панди | Composite bridge deck and method of construction of composite bridge deck (embodiments) |
-
2022
- 2022-03-30 CN CN202210327485.XA patent/CN114541249B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008121288A (en) * | 2006-11-13 | 2008-05-29 | Fuji Ps Corp | Continuous steel plate web bridge and method of constructing continuous steel plate web bridge |
| CN102220741A (en) * | 2011-04-14 | 2011-10-19 | 中铁二十局集团第六工程有限公司 | Steel-concrete composite girder construction technology striding current lines and being parallel to existing lines |
| CN104831635A (en) * | 2015-05-26 | 2015-08-12 | 中铁二十二局集团第三工程有限公司 | Combined H-shaped steel cast-in-situ box beam support adjoining to and overpassing existing lines |
| CN108222051A (en) * | 2018-03-23 | 2018-06-29 | 中铁二院工程集团有限责任公司 | A kind of contact net upright post basic of railway steel reinforced concrete bondbeam and steel reinforced concrete combination bridge |
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| Publication number | Publication date |
|---|---|
| CN114541249A (en) | 2022-05-27 |
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