CN110578288A - steel-concrete combined beam system conversion device and steel beam weight-pressing method - Google Patents
steel-concrete combined beam system conversion device and steel beam weight-pressing method Download PDFInfo
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- CN110578288A CN110578288A CN201910803095.3A CN201910803095A CN110578288A CN 110578288 A CN110578288 A CN 110578288A CN 201910803095 A CN201910803095 A CN 201910803095A CN 110578288 A CN110578288 A CN 110578288A
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention discloses a steel-concrete combination beam system conversion device which comprises a tensioning device and a conversion structure, wherein the tensioning device comprises a tensioning support and a tensioning mechanism, the tensioning mechanism is arranged on the tensioning support, the conversion structure comprises a conversion assembly and a connecting piece, the conversion assembly is arranged on a steel beam, one end of the connecting piece is connected with the conversion assembly, the other end of the connecting piece penetrates through the tensioning support and is connected with the tensioning mechanism, and meanwhile, the tensioning mechanism is used for tensioning the connecting piece, so that the conversion assembly has the tendency of moving towards the tensioning support, and the steel-concrete combination beam system conversion can be conveniently carried out. The invention also discloses a steel beam weight-pressing method, and the steel-concrete combination beam system conversion device can realize weight-pressing construction of the steel beam in the steel-concrete combination beam system.
Description
Technical Field
The invention relates to the field of bridge engineering construction, in particular to a steel-concrete combined beam system conversion device and a steel beam weight-pressing method.
background
Compared with a reinforced concrete beam, the steel-concrete combined beam has light self-weight, large effective use space and better self rigidity, stability and integrity; compared with a steel beam, the steel-concrete combined beam has the advantages of high rigidity, good overall stability, strong durability and steel saving. Based on the characteristics, the steel-concrete composite beam is suitable for the superstructure of the large-span bridge.
The transformation of a steel-concrete combined beam system generally requires that shear connectors (studs, channels, bent ribs and the like) be arranged between a steel beam and a concrete slab to resist the lifting and relative sliding of the steel beam and the concrete slab at an interface, so that the steel beam and the concrete slab are integrated and work together. At present, compared with the conventional conversion of a steel-concrete composite beam system, a concrete bridge deck is generally installed on a steel beam in a partitioning mode, a pouring wet joint part is reserved between the bridge deck boards, a shear connector is generally arranged at the position, and the bridge deck and the steel beam are combined through the wet joint to complete the conversion of the steel-concrete composite beam system.
The general steel-concrete combined beam system is not provided with prestress, but along with the increasing traffic demand, the construction of a large-span and heavy-load bridge is more and more indispensable, so the requirement on the bridge structure is higher and higher. In the large-span and heavy-load bridge, pre-pressure needs to be applied to the wet joint concrete in the construction process so as to prevent the problems of concrete cracking and the like of the large-span and heavy-load bridge. Therefore, before the wet joint is poured, the two sides of the steel beam are pressed by adopting a pressing and weighting method, so that the steel beam has certain deformation.
currently, there are two types of weight-reducing methods:
(1) And balancing the beam end. Ballasting is performed by piling concrete blocks or other weights on both sides of the top surface of the steel beam. The method has simple principle and convenient adjustment of the weight of the ballast, but generally needs large-scale hoisting equipment for assistance due to large weight of the ballast, has complex operation and has certain potential safety hazard; in addition, the weight load is large, more materials are needed, more steel beam operation space is occupied, and the construction influence is large; meanwhile, the lifting equipment and the loading and unloading field of the ballast material increase the engineering cost and are not economical.
(2) and (5) carrying out back pressure on the hanging basket. The lifting lugs are arranged on two sides of the bottom of the steel beam, the hanging basket is hung under the lifting lugs, and the weight on two sides of the steel beam is realized by loading concrete blocks or other heavy objects and the like in the hanging basket. The method is simple in principle, does not occupy the operation space of the steel beam compared with beam-end counterweight, but has the defects of large use amount of ballast materials, large-scale hoisting equipment for assistance, extra facility for hanging baskets, potential safety hazards, uneconomic performance and the like; in addition, the operation space under the beam is required to be large due to the operation under the steel beam, and the operation is inconvenient.
along with the rapid development of bridge construction in China, the application of the steel-concrete composite beam is wider and larger, the weight tonnage required by the steel-concrete composite beam system conversion construction is larger and larger, and if the traditional weight method is continuously adopted, the operation is inconvenient, a large amount of material resources are consumed, and great potential safety hazards are faced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a steel-concrete combined beam system conversion device, which can facilitate the conversion construction operation of a steel-concrete combined beam system and reduce the material consumption.
in order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
A steel-concrete composite beam system conversion device, comprising:
The tensioning equipment comprises a tensioning support and a tensioning mechanism, wherein the tensioning mechanism is arranged on the tensioning support;
The conversion structure comprises a conversion assembly and a connecting piece, the conversion assembly is arranged on the steel beam in a combining way, one end of the connecting piece is connected with the conversion assembly, and the other end of the connecting piece penetrates through the tensioning support and is connected with the tensioning mechanism; at the same time, the user can select the desired position,
The tensioning mechanism is configured to tension the connector such that the conversion assembly has a tendency to move toward the tensioning mount.
On the basis of the technical scheme, the tensioning support comprises four steel pipe piles and three cross beams, the four steel pipe piles are used for being inserted and driven on the ground, two ends of one cross beam are connected with two of the steel pipe piles, two ends of the other cross beam are connected with the rest two steel pipe piles, two ends of the rest one cross beam are respectively connected to the two cross beams connected with the steel pipe piles, an opening used for the connecting piece to penetrate through is formed in the rest one cross beam, and the tensioning mechanism is arranged on the lower surface of the rest cross beam.
on the basis of the technical scheme, the tensioning support comprises two steel pipe piles which are used for being inserted and driven on the ground, the two steel pipe piles are connected through a cross beam to form a linear structure, an opening through which the connecting piece penetrates is formed in the cross beam, and the tensioning mechanism is arranged on the lower surface of the cross beam.
on the basis of the technical scheme, the conversion assembly comprises lifting lugs and a lifting plate, the lifting lugs are arranged on the steel beam, one end of the lifting plate is connected with the lifting lugs, and the other end of the lifting plate is connected with the connecting piece.
On the basis of the technical scheme, the conversion structure further comprises a sleeve, one end of the sleeve is connected with the hanging plate, the other end of the sleeve is connected with one end of the connecting piece, and one end part of the connecting piece is accommodated in the sleeve.
On the basis of the technical scheme, stiffening plates are arranged at the connecting positions of the cross beams and the steel pipe piles.
On the basis of the technical scheme, the tensioning mechanism adopts a jack.
On the basis of the technical scheme, the connecting piece adopts a steel strand.
The invention also provides a method for weighting the steel beam by adopting the steel-concrete combined beam system conversion device, which comprises the following steps:
Arranging the conversion component on a steel beam;
and tensioning the tensioning bracket and the connecting piece.
on the basis of the technical scheme, the connecting piece is vertical.
Compared with the prior art, the invention has the advantages that:
The invention provides a steel-concrete combination beam system conversion device which can be suitable for the weight of a steel beam of a large-span and heavy-load bridge and comprises a conversion structure and a tensioning device, wherein the tensioning device comprises a tensioning support and a tensioning mechanism, the tensioning mechanism is arranged on the tensioning support, the conversion structure comprises a conversion assembly and a connecting piece, one end of the connecting piece is connected with the conversion assembly, the other end of the connecting piece penetrates through the tensioning support to be connected with the tensioning mechanism, the conversion assembly is arranged on the steel beam, and the connecting piece is tensioned through the tensioning mechanism, so that the conversion assembly has the tendency of moving towards the tensioning support, the steel beam of the steel-concrete combination beam is subjected to stress conversion to realize the weight of the steel beam, the conversion device is convenient to operate, and the weight construction of the steel beam is.
Drawings
Fig. 1 is a schematic view of a steel-concrete composite beam system conversion device provided in an embodiment of the present invention;
FIG. 2 is a top view of a tensioning device provided in accordance with an embodiment of the present invention;
Fig. 3 is a front view of fig. 2.
FIG. 4 is a schematic diagram of a conversion structure provided by an embodiment of the present invention;
FIG. 5 is a side view of FIG. 4;
FIG. 6 is a schematic view of a connection between a conversion assembly and a connector according to an embodiment of the present invention;
in the figure: 1. converting the structure; 10. a conversion component; 100. lifting lugs; 101. a hanger plate; 11. a connecting member; 12. a sleeve; 120. an anchor plate; 121. a clip; 2. tensioning equipment; 20. stretching the bracket; 21. a tensioning mechanism; 22. steel pipe piles; 23. a cross beam; 24. an opening; 25. a stiffening plate; 3. a steel beam; 4. and a side web.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, an embodiment of the present invention provides a steel-concrete composite beam system conversion apparatus, which includes a conversion structure 1 and a tensioning device 2, where the tensioning device 2 includes a tensioning support 20 and a tensioning mechanism 21, and the tensioning mechanism 21 is assembled on the tensioning support 20; the conversion structure 1 comprises a conversion assembly 10 and a connecting piece 11, wherein the conversion assembly 10 is arranged on the steel beam 3, one end of the connecting piece 11 is connected with the conversion assembly 10, and the other end of the connecting piece passes through the tensioning support 20 and is connected with the tensioning mechanism 21. In this embodiment, the connecting member 11 is tensioned by the tensioning mechanism 21, and under the action of the tensioning mechanism 21, the tensioning mechanism 21 and the connecting member 11 make the conversion assembly 10 have a tendency to move towards the tensioning bracket 20, so that the steel beam in the steel-concrete composite beam completes stress conversion and realizes weight bearing of the steel beam.
Referring to fig. 2 and 3, the tensioning bracket 20 includes four steel pipe piles 22 for being driven on the ground and three cross beams 23, two ends of one cross beam 23 are connected to two of the steel pipe piles 22, two ends of the other cross beam 23 are connected to the remaining two steel pipe piles 22, two ends of the remaining one cross beam 23 are respectively connected to the two cross beams 23 connected to the steel pipe piles 22, an opening 24 for the connection member 11 to pass through is formed in the remaining one cross beam 23, and the tensioning mechanism 21 is disposed on the lower surface of the remaining cross beam 23. In this embodiment, the cross beams 23 are made of section steel, two steel pipe piles 22 of the four steel pipe piles 22 are connected through one cross beam 23, the other two steel pipe piles 22 are connected through the other cross beam 23, two ends of the remaining cross beam 23 respectively connect the two cross beams 23, the three cross beams 23 are connected with each other to form an i-shaped structure, a circular opening 24 is arranged in the middle of the middle cross beam 23, the circular opening 24 just allows the connecting piece 11 to pass through, the tensioning mechanism 21 is arranged at the lower end of the middle cross beam 23, and when the tensioning mechanism 21 is tensioned, the tensioning mechanism 21 pushes the middle cross beam 23 upwards, so that the connecting piece 11 and the conversion assembly 10 tend to move downwards. In addition, the tensioning bracket 20 may be provided with two cross beams 23, the two cross beams 23 are connected, one of the cross beams 23 is provided with an opening 24, and the tensioning mechanism 21 is arranged on the lower surface of the cross beam 23. In the embodiment, four steel pipe piles 22 are adopted, so that the stress on the tension bracket 20 is more balanced when the tension mechanism 21 is tensioned.
Specifically, the tensioning bracket 20 may further include two steel pipe piles 22 for being driven on the ground, the two steel pipe piles 22 are connected by a cross beam 23, an opening 24 for the connection member 11 to pass through is formed in the cross beam 23, and the tensioning mechanism 21 is disposed on the cross beam 23. In this embodiment, the cross beam 23 has a circular opening 24 in the middle, the circular opening 24 just allows the connecting member 11 to pass through, and also when the tensioning mechanism 21 is tensioned, the tensioning mechanism 21 pushes the cross beam 23 upwards, so that the connecting member 11 and the conversion assembly 10 tend to move downwards.
referring to fig. 4, the conversion assembly 10 includes a lifting lug 100 and a hanger plate 101, the lifting lug 100 is provided on the steel beam 3, and one end of the hanger plate 101 is connected to the lifting lug 100 and the other end is connected to the connecting member 11. In this embodiment, the lifting lug 100 is used for being welded on the steel beam 3 at the lower end of the side web plate 4, and one end of the lifting plate 101 is connected with the lifting lug 100 through a bolt, so that the steel beam can realize the conversion of a stress system conveniently.
Referring to fig. 5 and 6, the conversion structure 1 further includes a sleeve 12, one end of the sleeve 12 is connected to the hanger plate 101, the other end is connected to one end of the connecting member 11, and one end of the connecting member 11 is partially received in the sleeve 12. Specifically, in this embodiment, an anchor plate 120 is further disposed inside the sleeve 12, one end of the connecting member 11 is fixed on the anchor plate 120, and a clamping piece 121 for clamping the connecting member 11 is further disposed on the connecting member 11, so that the connecting member 11 is stressed more uniformly, and the connecting member 11 and the sleeve 12 are combined more firmly.
referring to fig. 2, a stiffening plate 25 for connecting the cross beam 23 and the steel pipe pile 22 more firmly is provided at the joint of the cross beam 23 and the steel pipe pile 22.
specifically, the tensioning mechanism 21 in the invention adopts a common jack, and the connecting piece 11 is composed of a plurality of steel strands.
Referring to fig. 1, the present invention also provides a method for weighting a steel beam 3 using the above steel-concrete composite beam system conversion apparatus, which includes the following steps:
S1: assembling the conversion assembly 10 on the steel beam 3;
s2: fixing the tension bracket 20 on the ground;
S3: the tensioning mechanism 21 is activated to tension the connection 11.
specifically, the lifting lugs 100 of the conversion assembly 10 are welded on the steel beams 3 at the lower end of the side webs 4 in the step S1; s2, fixedly arranging the tensioning bracket 20 right below the conversion assembly 10, and enabling the connecting piece 11 to be vertical; in S3, the tensioning mechanism 21 is started, and the tensioning mechanism 21 tensions the connecting member 11 until the tension of the tensioning mechanism 21 reaches a required force. Thereby realizing the weight of the steel-concrete combined beam system conversion device on the steel beam 3.
the present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. A steel-concrete composite beam system conversion device is characterized by comprising:
the tensioning equipment (2) comprises a tensioning bracket (20) and a tensioning mechanism (21), wherein the tensioning mechanism (21) is assembled on the tensioning bracket (20);
The steel beam tensioning device comprises a conversion structure (1), wherein the conversion structure (1) comprises a conversion assembly (10) and a connecting piece (11), the conversion assembly (10) is arranged on a steel beam (3), one end of the connecting piece (11) is connected with the conversion assembly (10), and the other end of the connecting piece (11) penetrates through a tensioning support (20) and is connected with a tensioning mechanism (21); at the same time, the tensioning mechanism (21) is used for tensioning the connecting piece (11) so that the conversion assembly (10) has a tendency to move towards the tensioning bracket (20).
2. The steel-concrete composite beam system conversion device according to claim 1, wherein the tension bracket (20) comprises four steel pipe piles (22) for being driven on the ground and three cross beams (23), two ends of one cross beam (23) are connected with two of the steel pipe piles (22), two ends of the other cross beam (23) are connected with the remaining two steel pipe piles (22), two ends of the remaining one cross beam (23) are respectively connected to the two cross beams (23) connected with the steel pipe piles (22), an opening (24) for the connecting piece (11) to pass through is formed in the remaining one cross beam (23), and the tension mechanism (21) is arranged on the lower surface of the remaining cross beam (23).
3. the steel-concrete composite beam system conversion device according to claim 1, wherein the tension bracket (20) comprises two steel pipe piles (22) for being inserted and driven on the ground, the two steel pipe piles (22) are connected through a cross beam (23), an opening (24) for the connecting piece (11) to pass through is formed in the cross beam (23), and the tension mechanism (21) is arranged on the lower surface of the cross beam (23).
4. The steel-concrete bond beam system conversion device according to claim 1, wherein the conversion assembly (10) comprises an ear (100) and a hanger plate (101), the ear (100) is used for being arranged on the steel beam (3), one end of the hanger plate (101) is connected with the ear (100), and the other end is connected with the connecting piece (11).
5. A steel-concrete composite beam system conversion device according to claim 4, wherein said conversion structure (1) further comprises a sleeve (12), one end of said sleeve (12) is connected to said hanger plate (101), the other end is connected to one end of said connecting member (11), and one end portion of said connecting member (11) is received in said sleeve (12).
6. a steel-concrete bond beam system conversion device according to claim 2, wherein a stiffening plate (25) is provided at the connection of the cross beam (23) and the steel pipe pile (22).
7. The steel-concrete composite beam system conversion device according to claim 1, wherein the tensioning mechanism (21) employs a jack.
8. The steel-concrete bond beam system conversion device of claim 1, wherein the connecting piece (11) is a steel strand.
9. A method for ballasting a steel beam (3) using the steel-concrete composite beam system conversion apparatus according to claim 1, comprising the steps of:
Assembling the conversion assembly (10) on a steel beam (3);
Fixing the tension bracket (20) on the ground;
And starting the tensioning mechanism (21) to tension the connecting piece (11).
10. The method for ballasting a steel beam (3) by a steel-concrete composite beam system conversion apparatus according to claim 9, wherein the connecting member (11) is vertical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910803095.3A CN110578288A (en) | 2019-08-28 | 2019-08-28 | steel-concrete combined beam system conversion device and steel beam weight-pressing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910803095.3A CN110578288A (en) | 2019-08-28 | 2019-08-28 | steel-concrete combined beam system conversion device and steel beam weight-pressing method |
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| CN110578288A true CN110578288A (en) | 2019-12-17 |
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Citations (6)
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| CN202766971U (en) * | 2011-12-26 | 2013-03-06 | 中铁七局集团有限公司 | A ground counter-pull pre-pressing device for a continuous beam cantilever cast-in-place hanging basket |
| CN103352429A (en) * | 2013-07-12 | 2013-10-16 | 中铁八局集团有限公司 | Bracket counter pull loading pre-pressing device and tensioning pre-pressing method thereof |
| CN107841951A (en) * | 2017-09-28 | 2018-03-27 | 苏交科集团股份有限公司 | Preloading device for controlling pier top concrete cracks of steel-concrete composite beam bridge and construction method |
| CN108457195A (en) * | 2018-03-16 | 2018-08-28 | 广州市市政工程设计研究总院 | A kind of mixed composite beam bridge pre-bending construction method of steel- |
| CN109629419A (en) * | 2019-01-18 | 2019-04-16 | 中铁第四勘察设计院集团有限公司 | Efficiently apply prestressed rear in conjunction with the mixed bondbeam of steel-and bridge and construction method |
| JP2019108725A (en) * | 2017-12-18 | 2019-07-04 | 黒沢建設株式会社 | Coupling structure and coupling method of precast pc floor slabs |
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2019
- 2019-08-28 CN CN201910803095.3A patent/CN110578288A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202766971U (en) * | 2011-12-26 | 2013-03-06 | 中铁七局集团有限公司 | A ground counter-pull pre-pressing device for a continuous beam cantilever cast-in-place hanging basket |
| CN103352429A (en) * | 2013-07-12 | 2013-10-16 | 中铁八局集团有限公司 | Bracket counter pull loading pre-pressing device and tensioning pre-pressing method thereof |
| CN107841951A (en) * | 2017-09-28 | 2018-03-27 | 苏交科集团股份有限公司 | Preloading device for controlling pier top concrete cracks of steel-concrete composite beam bridge and construction method |
| JP2019108725A (en) * | 2017-12-18 | 2019-07-04 | 黒沢建設株式会社 | Coupling structure and coupling method of precast pc floor slabs |
| CN108457195A (en) * | 2018-03-16 | 2018-08-28 | 广州市市政工程设计研究总院 | A kind of mixed composite beam bridge pre-bending construction method of steel- |
| CN109629419A (en) * | 2019-01-18 | 2019-04-16 | 中铁第四勘察设计院集团有限公司 | Efficiently apply prestressed rear in conjunction with the mixed bondbeam of steel-and bridge and construction method |
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Application publication date: 20191217 |
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