CN212294301U - Railway cable-stayed bridge with concrete main beam and steel main beam in mixed matching - Google Patents
Railway cable-stayed bridge with concrete main beam and steel main beam in mixed matching Download PDFInfo
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- CN212294301U CN212294301U CN202020072675.8U CN202020072675U CN212294301U CN 212294301 U CN212294301 U CN 212294301U CN 202020072675 U CN202020072675 U CN 202020072675U CN 212294301 U CN212294301 U CN 212294301U
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Abstract
The utility model discloses a railway cable-stayed bridge with a concrete girder and a steel girder which are mixed and matched, which comprises a concrete girder, a steel girder, a bridge tower, a stay cable, a foundation pier, a pier and a side pier; two bridge towers are arranged in part of the cable-stayed bridge, wherein a main span between the two bridge towers is adopted, and a steel main beam is adopted to replace a concrete main beam in part of beam sections, so that the cable-stayed bridge with the concrete main beam and the steel main beam mixed is formed. The utility model discloses in the weight that steel box girder unit length corresponds will be lighter than the weight of equal length concrete girder, when using the steel girder part to replace concrete girder working length, indirectly shorten the total length of concrete girder, reduce the vertical displacement that the shrink creep of concrete girder caused, easily satisfy the deformation requirement of railway train driving, also reduce the girder body of longitudinal bridge to shorten length, thereby reduce pier and ground mound because the girder body shortens the inferior internal force that causes, greatly improve the overall structure atress.
Description
[ technical field ] A method for producing a semiconductor device
The patent of the utility model relates to a bridge engineering field specifically is a concrete girder and steel girder mix railway cable-stay bridge of collocation, as the railway part cable-stay bridge structure.
[ background of the invention ]
At present, railway cable-stayed bridges at home and abroad adopt concrete girders, and the internal force of the girders under the action of constant load is large due to the heavy weight of the concrete girders; the application span of the conventional prestressed concrete girder part cable-stayed bridge is generally about 200-300m, and the creep displacement of the concrete girder is larger due to the increase of the span, so that the requirement of a railway, particularly a high-speed railway for laying ballastless tracks, is difficult to meet.
Because the concrete has the problem of shrinkage and creep, the main beam can generate vertical shrinkage and creep displacement after the bridge is formed, and is mostly irreversible displacement, thereby causing the irregularity of the running of the railway train, also generating the longitudinal shrinkage and creep shortening of the beam body, generating deviation on the bridge pier and the foundation, generating larger secondary internal force on the beam body, the bridge pier and the foundation, and being unfavorable for the stress of the structure.
The concrete girder of a cable-stayed bridge of a large-span railway part generally adopts cantilever segment cast-in-place construction, the length of each segment is generally 3-5m, and each segment needs to move a hanging basket, bind reinforcing steel bars, pour concrete, maintain, prestress tension and other processes, so that the problems of complex construction processes and long construction period exist.
In view of the above, it is an urgent problem in the art to overcome the above-mentioned drawbacks of the prior art.
[ summary of the invention ]
The utility model discloses the technical problem that needs to solve is: through the railway cable-stayed bridge with the concrete main beam and the steel main beam which are mixed and matched, the dead weight of the main span middle beam body of the cable-stayed bridge is reduced, the constant load internal force of the main beam is greatly reduced, and the spanning capacity of the cable-stayed bridge is increased.
The utility model discloses a following technical scheme reaches above-mentioned purpose: the steel-concrete main beam partial cable-stayed bridge comprises a concrete main beam, a steel main beam, a bridge tower, stay cables, a foundation pier, a pier and a side pier; the bridge piers are vertically arranged on the foundation piers; two piers are arranged in total, and a side pier is correspondingly arranged on the side edge of each pier; a bridge tower is vertically arranged on each pier; a group of stay cables is arranged at the top of each bridge tower; a concrete main beam is arranged under each bridge tower in a spanning mode, and a steel main beam is arranged between the two concrete main beams; the stay cable penetrates through the top of the bridge tower, one end of the stay cable is connected to the concrete main beam on one side of the bridge tower, and the other end of the stay cable is connected to the concrete main beam or the steel main beam on the other side of the bridge tower, so that the concrete main beam is mounted on the corresponding bridge tower, and the steel main beam is mounted on the bridge towers on two sides; specifically, two ends of one part of the stay cables are connected to the concrete girder, one end of the rest part of the stay cables is connected to the concrete girder, and the other end of the stay cables is connected to the steel girder.
One end of the concrete girder extends to the side pier, and the other end of the concrete girder extends to the steel girder and is connected with the steel girder in a matching way.
Further, the bridge pier, the bridge tower and the concrete main beam are fixedly connected and shaped with each other; the steel girder and the concrete girders on the two sides of the steel girder are consolidated; the stay cable is used as a stiffening structure of the main beam and is anchored on the concrete main beam and the steel box main beam.
Furthermore, the steel girder is a steel box girder, and the weight of the steel box girder corresponding to the unit length is one third of that of the concrete girder with the same length.
Furthermore, the part of the concrete girder between the side pier and the tower beam accounts for 60-75% of the single concrete girder, the other part of the concrete girder accounts for 40-25% of the single concrete girder, the tail end of the part of the concrete girder with small proportion is connected with a steel girder to realize the extension of the bridge deck, and the length of the steel girder corresponds to the ratio of the left part to the right part of the concrete girder and is 40-100% of the length of the single concrete girder.
Further, the steel box girders are uniformly customized in a production plant, and are integrally transported to the bridge position of the cable-stayed bridge in a floating manner before installation, and can be integrally lifted and installed.
Further, the cable-stayed bridge integrally has the following stress conditions from the inside: the foundation pier jacks up the pier and the side pier, the pier jacks up the bridge tower, the bridge tower carries the stay cables, and the stay cables hoist the concrete main beam and the steel main beam.
Compared with the prior art, the utility model has the following advantages.
1. The midspan part of the midspan of the cable-stayed bridge adopts a steel girder to connect concrete girders on two sides, so that the total dead weight of the girders is reduced, and the internal force under the action of the dead weight is effectively improved; and a part of beam bodies adopt steel structure main beams, so that the vertical shrinkage creep displacement of the main beams can be effectively reduced, and the longitudinal shrinkage creep of the main beams is shortened.
2. The steel structure girder is a steel box girder, can be manufactured by an integral factory, and can be integrally hoisted after being transported to a bridge position in a floating manner, so that the construction process is greatly simplified, and the construction period is shortened.
3. The cable-stayed bridge structure with the concrete girder and the steel girder mixed and matched part has larger spanning capacity than the cable-stayed bridge structure with the conventional concrete girder part, can meet the technical requirements of laying various railway tracks, and has good social and economic benefits.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic front view of a portion of a cable-stayed bridge according to an embodiment of the present invention.
Fig. 2 is the embodiment of the present invention, a schematic cross-sectional view of a concrete girder.
Fig. 3 is a schematic cross-sectional view of a steel girder in an embodiment of the present invention.
In the figure: 1-a bridge tower; 2-stay cables; 3-a concrete girder; 4-steel main beam; 5-bridge pier; 6-side pier; 7-foundation pier.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "up", "down", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The present invention will be described in detail with reference to the accompanying drawings and examples.
Example, as shown in fig. 1 to 3, a steel-concrete girder partial cable-stayed bridge includes a concrete girder 3, a steel girder 4, a pylon 1, a stay cable 2, a foundation pier, a pier 5, and a side pier 6; the bridge piers 5 are vertically arranged on the foundation pier; two piers 5 are arranged in total, and a side pier 6 is correspondingly arranged on the side edge of each pier 5; each bridge pier 5 is vertically provided with a bridge tower 1; the top of each bridge tower 1 is provided with a group of stay cables 2, and each group is provided with nine stay cables 2; a concrete main beam 3 is arranged under each bridge tower 1 in a spanning manner, a steel main beam 4 is arranged between the two concrete main beams 3, each concrete main beam 3 is 160m long in the embodiment, and each steel main beam 4 is 64m long; the stay cable 2 penetrates through the top of the bridge tower 1, one end of the stay cable is connected to the concrete main beam 3 on one side of the bridge tower 1, the other end of the stay cable is connected to the concrete main beam 3 or the steel main beam 4 on the other side of the bridge tower 1, so that the concrete main beam 3 is hung on the corresponding bridge tower 1, and the steel main beams 4 are hung on the bridge towers 1 on two sides; specifically, two ends of four stay cables 2 are connected to a concrete main beam 3, and one end of each of five stay cables 2 is connected to the concrete main beam 3, and the other end is connected to a steel main beam 4; specifically, the steel main beam 4 is simultaneously and cooperatively hoisted by five stay cables 2 on the bridge towers 1 at two sides.
One end of the concrete main beam 3 extends to the side pier 5, and the other end extends to the steel main beam 4 and is connected with the steel main beam 4 in a matched mode.
Further, the bridge pier 5, the bridge tower 1 and the concrete girder 3 are fixedly connected and shaped with each other; the steel main beam 4 and the concrete main beams 3 on the two sides of the steel main beam are solidified; the stay cable 2 is used as a stiffening structure of the main beam and is anchored on the concrete main beam 3 and the steel box main beam.
Further, the steel main beam 4 is a steel box beam, and the weight corresponding to the unit length of the steel box beam is one third of the weight of the concrete main beam 3 with the same length.
Further, the part of the concrete girder 3 between the side pier 5 and the tower beam accounts for 60% of the single concrete girder 3, the length of the part is 96m, the other part accounts for 40% of the single concrete girder 3, the length of the part is 64m, the tail end of the part of the concrete girder 3 with small proportion is connected with the steel girder 4 to realize the extension of the bridge deck, the length of the steel girder 4 corresponds to the ratio of the left part and the right part of the concrete girder 3, and is 40% of the length of the single concrete girder 3, and the length of the steel girder is 64 m.
In the embodiment, the steel main beam 4 is a steel box beam, and the weight corresponding to the unit length of the steel box beam is one third of that of the concrete main beam 3 with the same length; the external dimensions of the horizontal accompanying surfaces of the steel box girder and the concrete box girder are matched, so that the steel box girder and the concrete box girder are conveniently connected in a matched manner, and the appearance of the bridge deck is unified.
In this embodiment, the steel box girders are customized in a unified manner in a manufacturing plant, are integrally transported to the bridge position of the cable-stayed bridge in a floating manner before installation, and are integrally lifted and installed between the concrete box girders on the two sides.
In this embodiment, the cable-stayed bridge is integrally under the internal stress condition: the foundation pier 7 jacks up the pier 5 and the side pier 6, the pier 5 jacks up the bridge tower 1, the bridge tower 1 carries the stay cable 2, and the stay cable 2 jacks up the concrete girder 3 and the steel girder 4.
In the embodiment, the weight of the steel box girder is only one third of that of the concrete main girder 3 with the same length, and after the main span between the two bridge towers 1 adopts the steel box girder as a part of the whole main girder, the bending moment of the whole main girder at the consolidation fulcrum is reduced by 30%, so that the stress condition of the whole main girder is greatly improved.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. A railway cable-stayed bridge with a concrete girder and a steel girder which are mixed and matched is characterized by comprising a concrete girder (3), a steel girder (4), a bridge tower (1), stay cables (2), a foundation pier, a pier (5) and a side pier (6);
the bridge piers (5) are vertically arranged on the foundation pier; two piers (5) are arranged in total, and a side pier (6) is correspondingly arranged on the side edge of each pier (5);
each bridge pier (5) is vertically provided with a bridge tower (1);
the top of each bridge tower (1) is provided with a group of stay cables (2);
a concrete main beam (3) is arranged under each bridge tower (1) in a spanning mode, and a steel main beam (4) is arranged between the two concrete main beams (3);
the stay cable (2) penetrates through the top of the bridge tower (1), one end of the stay cable is connected to the concrete main beam (3) on one side of the bridge tower (1), the other end of the stay cable is connected to the concrete main beam (3) or the steel main beam (4) on the other side of the bridge tower (1), so that the concrete main beam (3) is hung on the corresponding bridge tower (1), and the steel main beams (4) are hung on the bridge towers (1) on two sides;
one end of the concrete main beam (3) extends to the side pier (5), and the other end of the concrete main beam extends to the steel main beam (4) and is connected with the steel main beam (4) in a matched mode.
2. The railway cable-stayed bridge with the concrete girder and the steel girder which are matched in a mixed manner according to claim 1, wherein the bridge piers (5), the bridge tower (1) and the concrete girder (3) are fixedly connected and shaped with each other; the steel main beam (4) is solidified with the concrete main beams (3) on the two sides of the steel main beam; the stay cable (2) is used as a stiffening structure of the main beam and is anchored on the concrete main beam (3) and the steel main beam (4).
3. The railway cable-stayed bridge with the concrete main beams and the steel main beams in mixed matching according to claim 2, characterized in that the steel main beams (4) are steel box beams, and the weight of the steel box beams per unit length is one third of that of the concrete main beams (3) with the same length.
4. The railway cable-stayed bridge with the concrete girders and the steel girders in mixed matching according to claim 3, wherein the part of the concrete girders (3) between the side piers (5) and the tower beams accounts for 60-75% of the single concrete girder (3), the other part accounts for less than the single concrete girder (3), and only 40-25%, the tail end of the less part of the concrete girder (3) is connected with the steel girder (4) to realize the extension of the bridge deck, the length of the steel girder (4) corresponds to the ratio of the left part and the right part of the concrete girder (3), and is 40-100% of the length of the single concrete girder (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020072675.8U CN212294301U (en) | 2020-01-14 | 2020-01-14 | Railway cable-stayed bridge with concrete main beam and steel main beam in mixed matching |
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| CN202020072675.8U CN212294301U (en) | 2020-01-14 | 2020-01-14 | Railway cable-stayed bridge with concrete main beam and steel main beam in mixed matching |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113136784A (en) * | 2021-04-16 | 2021-07-20 | 上海市政工程设计研究总院（集团）有限公司 | Composite main beam cable-stayed bridge |
| CN114427184A (en) * | 2022-01-28 | 2022-05-03 | 中铁第一勘察设计院集团有限公司 | Railway steel-concrete part cable-stayed bridge combined beam structure |
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2020
- 2020-01-14 CN CN202020072675.8U patent/CN212294301U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113136784A (en) * | 2021-04-16 | 2021-07-20 | 上海市政工程设计研究总院（集团）有限公司 | Composite main beam cable-stayed bridge |
| CN114427184A (en) * | 2022-01-28 | 2022-05-03 | 中铁第一勘察设计院集团有限公司 | Railway steel-concrete part cable-stayed bridge combined beam structure |
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