CN109811660B - Device for preventing instability of tensioning of reinforced concrete bridge member - Google Patents
Device for preventing instability of tensioning of reinforced concrete bridge member Download PDFInfo
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- CN109811660B CN109811660B CN201910191487.9A CN201910191487A CN109811660B CN 109811660 B CN109811660 B CN 109811660B CN 201910191487 A CN201910191487 A CN 201910191487A CN 109811660 B CN109811660 B CN 109811660B
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- stabilizing
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- frames
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- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 11
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 54
- 230000000903 blocking effect Effects 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000000368 destabilizing effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 239000003381 stabilizer Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Landscapes
- Bridges Or Land Bridges (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention relates to a tension instability-preventing device for a reinforced concrete bridge member, which comprises a stabilizing beam connected with a left beam and a right beam, wherein two ends of the stabilizing beam are provided with fixing frames, the fixing frames are fixed on the beams, and a fixing structure for limiting the longitudinal movement of the stabilizing beam is arranged between the stabilizing beam and the fixing frames. The invention has the following beneficial effects: the two independent tie beams are connected into a whole by the stabilizing beam, so that the constraint condition is added, the free length of the tie beams is greatly reduced, the slenderness ratio is reduced, and the stability is improved; the stable beam and the tie beam are limited in the up-down, left-right and front-back directions through the fixed frame and the blocking piece, the connection is reliable, the installation and the disassembly of the stable beam are convenient, the stable Liang Youbei lightning frame is assembled and formed, and the device has the advantages of rapid assembly, easy material obtaining, low cost and standing effect.
Description
Technical Field
The invention relates to the technical field of building construction equipment, in particular to a tension instability preventing device for a reinforced concrete bridge member.
Background
Along with the vigorous development of national traffic engineering construction, bridge engineering spans are larger and larger, and the variety of bridge structures is gradually increased. As an ancient bridge structure in China, arch bridges gradually evolve into more and more combination forms along with the development of modern science and technology. For example, the under-bearing reinforced concrete tie-bar arch bridge of the beam grid system is a product of the combination of the traditional arch bridge and the modern science and technology. Tie beams of the tied arch bridge are symmetrically arranged on two sides of the bridge, the beam body structure is a prestressed reinforced concrete structure, and prestressed tensioning is carried out after the cast-in-place is completed and the concrete strength reaches the design strength. In bridge engineering, buckling analysis is usually required to be carried out on a pressed component, so that the stability of the pressed component is ensured, the slenderness ratio of the component is an important technical parameter index of the pressed component, and the larger the numerical value is, the more easily the component is unstable. The tie beam of the tied arch bridge is generally 70-150m or more in length, 3m or less in height and about 2m in width, so that the tie beam is easy to be unstable in the tensioning process.
Meanwhile, the prestress steel strands of the beam member are not fully symmetrically arranged on the cross section of the beam member or limited by the number of field tensioning construction equipment, and cannot be fully symmetrically and synchronously tensioned. Therefore, the beam body can be in an eccentric compression state in the tensioning process, and if a certain constraint condition is not provided when Liang Tishi in the eccentric compression state and larger prestress is added, the beam body is unstable, and quality events and even safety accidents are generated.
Disclosure of Invention
The invention provides a tension instability prevention device for a reinforced concrete bridge member, which solves the problem that a tie beam is unstable in the tensioning process.
The above object of the present invention is achieved by the following technical solutions: the utility model provides a reinforced concrete bridge member stretch-draw prevents unstability device, includes the stable roof beam of connecting in two tie beams about, the both ends of stable roof beam are provided with fixed frame, fixed frame fixes on the tie beam, be equipped with the fixed knot of restriction stable roof beam longitudinal movement between stable roof beam and the fixed frame.
Preferably, the fixing structure comprises a blocking member fixedly connected to the fixing frame and fixedly connected to an end of the stabilizer beam in the longitudinal direction of the stabilizer beam.
Preferably, each end of the stabilizing beam has at least two blocking members, which are disposed back and forth in the longitudinal direction of the stabilizing beam and clamped at the ends of the stabilizing beam.
Preferably, the ends of the stabilizing beam are erected on the tie beam, and two fixing frames are arranged on the same tie beam and clamped on two sides of the stabilizing beam in the transverse direction.
Preferably, the fixed frame comprises a lower beam, an upper beam and two vertical beams, wherein the lower beam, the upper beam and the vertical beams enclose a frame structure with a sleeve hole, the fixed frame is sleeved on the tie beam through the sleeve hole, and two ends of the blocking piece are fixedly connected to the corresponding upper beams respectively.
Preferably, the vertical beams extend upward above the upper beams and form a blocking structure in the lateral direction of the stabilizing beams.
Preferably, the stabilizing beam is a steel frame beam, and has a bottom beam and a vertical support beam, the bottom beam is erected on the tie beam and is positioned below the blocking members, and the vertical support beam is arranged at two ends of the stabilizing beam and is clamped between the two blocking members.
The stabilizing beam is limited on the tie beam by the blocking piece in the up-down direction and the blocking piece in the longitudinal direction, and is limited by the two fixing frames in the transverse direction, so that the stabilizing beam and the tie beam are fixed together, and meanwhile, the follow-up disassembly is convenient.
Preferably, the stable Liang Youbei lightning frames are formed by longitudinal splicing.
The length of the stabilizing beam can be controlled by increasing or reducing the number of the bailey frames according to the actual beam gap, and the assembly speed is high and the disassembly is easy.
The invention has the following beneficial effects: 1. the two independent tie beams are connected into a whole by the stabilizing beam, so that the constraint condition is added, the free length of the tie beams is greatly reduced, the slenderness ratio is reduced, and the stability is improved;
2. The stabilizing beam and the tie beam are limited in the up-down, left-right and front-back directions through the fixed frame and the blocking piece, so that the connection is reliable, and the stabilizing beam is convenient to install and detach;
3. the stable Liang Youbei lightning frame is assembled and formed, and has the advantages of quick assembly, easy material obtaining, low cost and standing effect.
Drawings
FIG. 1 is a top view of an embodiment of the present invention;
FIG. 2 is a side view of an embodiment of the present invention;
FIG. 3 is a schematic view of the installation of a fixed frame in an embodiment of the invention;
FIG. 4 is a view in the direction A of FIG. 2;
In the figure: 1-tie beam, 2-stabilizing beam, 21-bottom beam, 22-vertical supporting beam, 3-fixed frame, 31-lower beam, 32-upper beam, 33-vertical beam, 34-blocking piece, 35-longitudinal beam.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention, may be made by those skilled in the art after reading the present specification, are only protected by patent laws within the scope of the claims of the present invention.
Examples: as shown in fig. 1, 2,3 and 4, a tension instability preventing device for a reinforced concrete bridge member comprises a stabilizing beam 2 and a fixed frame 3. In this embodiment, the bridge members are tie beams 1, and the number of tie beams 1 is two, and the two tie beams are respectively erected on respective piers. The two ends of the stabilizing beam 2 are respectively erected on the left and right tie beams 1, the longitudinal direction of the stabilizing beam 2 is crossed or perpendicular to the longitudinal direction of the tie beams 1, and the fixed frames 3 are arranged at the two ends of the stabilizing beam 2 and are used for connecting the stabilizing beam 2 and the tie beams 1. The number of the stabilizing beams 2 is one or more, and when a plurality of stabilizing beams 2 are provided, the stabilizing beams 2 are distributed at intervals along the longitudinal direction of the tie beam 1.
As shown in fig. 2, the stabilizing beam 2 is a steel frame beam and is formed by longitudinally splicing bailey frames, and has the advantages of quick assembly, easy material obtaining and low cost, and is also convenient for later dismantling. The stabilizing beam 2 has a bottom beam 21 for being erected on the tie beam 1 and a vertical support beam 22, the vertical support beam 22 being located at an end of the stabilizing beam 2.
As shown in fig. 3 and 4, the fixing frame 3 is a frame structure formed by section steel, and is surrounded by a lower beam 31, an upper beam 32 and two vertical beams 33, a square sleeve hole is formed in the middle of the frame, and the fixing frame 3 is sleeved on the tie beam 1 through the sleeve hole and is fixed. The upper beam 32 is located above the tie beam 1, the lower beam 31 is located below the tie beam 1, and two vertical beams 33 are located on both sides of the tie beam 1 in the cross-sectional direction. Each end of the stabilizing beam 2 is provided with two fixed frames 3, the two fixed frames 3 are sleeved on the same tie beam 1, and the two fixed frames 3 are connected into a whole through a longitudinal beam 35. The two fixing frames 3 are respectively arranged at two sides of the transverse direction of the stabilizing beam 2, and clamp and limit the stabilizing beam 2 in the transverse direction. The upper ends of the vertical beams 33 extend upwards above the upper beams 32, which extension forms a blocking structure in the transverse direction of the stabilizing beam 2. Because the stabilizing beam 2 is relatively slender, the extension section not only limits the movement of the stabilizing beam 2 in the transverse direction, but also can support the stabilizing beam 2 by propping against the outer frame of the stabilizing beam 2 in the transverse direction, so as to prevent the stabilizing beam 2 from being unstable.
As shown in fig. 3 and 4, a fixing structure for restricting the longitudinal movement of the stabilizer beam 2 is provided between the stabilizer beam 2 and the fixing frame 3. The fixing structure comprises a blocking piece 34, wherein the blocking piece 34 is formed steel and fixedly connected to the fixing frame 3 in a threaded or welded mode. The blocking member 34 is connected between two fixed frames 3 on the same tie beam 1, the blocking member 34 is erected above the upper beam 32 of the fixed frame 3, and both ends thereof are respectively screwed or welded to the corresponding upper beam 32. And the stopper 34 is also located above the bottom beam 21 of the stabilizer beam 2, restraining the bottom beam 21 between the stopper 34 and the tie beam 1, thereby fixedly restraining the stabilizer beam 2 in the up-down direction.
In the present embodiment, each end of the stabilizer beam 2 has two stoppers 34, and the two stoppers 34 are disposed back and forth in the longitudinal direction of the stabilizer beam 2, so that the two stoppers 34 are clamped on both front and back sides of the vertical support beam 22 of the stabilizer beam 2, thereby fixing the stabilizer beam 2 in the longitudinal direction of the stabilizer beam 2. As shown in fig. 3, the two stops 34 are located close to the outside of the center of gravity of the tie beam 1, increasing the moment against the torsion of the tie beam 1.
In other embodiments, the number of the blocking members 34 may be greater, for example, four, and two blocking members 34 located on the same side are disposed on two sides of the vertical support beam 22 in a front-to-back manner.
Claims (2)
1. The utility model provides a reinforced concrete bridge component stretch-draw prevents unstability device which characterized in that: the device comprises a stabilizing beam (2) connected with a left tie beam (1) and a right tie beam (1), wherein fixed frames (3) are arranged at two ends of the stabilizing beam (2), the fixed frames (3) are fixed on the tie beam (1), and a fixed structure for limiting the longitudinal movement of the stabilizing beam (2) is arranged between the stabilizing beam (2) and the fixed frames (3);
the fixing structure comprises a blocking piece (34), wherein the blocking piece (34) is fixedly connected to the fixing frame (3) and fixedly connected with the end part of the stabilizing beam (2) in the longitudinal direction of the stabilizing beam (2);
Each end of the stabilizing beam (2) is provided with at least two blocking pieces (34), and the two blocking pieces (34) are arranged back and forth along the longitudinal direction of the stabilizing beam (2) and clamped at the end part of the stabilizing beam (2);
the end parts of the stabilizing beams (2) are erected on the tie beams (1), two fixing frames (3) are arranged on the same tie beam (1), and the two fixing frames (3) are clamped at two sides of the stabilizing beams (2) in the transverse direction;
The fixed frame (3) comprises a lower beam (31), an upper beam (32) and two vertical beams (33), wherein the lower beam (31), the upper beam (32) and the vertical beams (33) are enclosed to form a frame structure with a sleeve hole, the fixed frame (3) is sleeved on the tie beam (1) through the sleeve hole, and two ends of the blocking piece (34) are fixedly connected to the corresponding upper beams (32) respectively;
The vertical beams (33) extend upwards to the upper part of the upper beam (32) and form a blocking structure in the transverse direction of the stabilizing beam (2);
The stabilizing beam (2) is a steel frame beam and is provided with a bottom beam (21) and a vertical supporting beam (22), the bottom beam (21) is erected on the tie beam (1) and is positioned below the blocking pieces (34), and the vertical supporting beam (22) is arranged at two ends of the stabilizing beam (2) and is clamped between the two blocking pieces (34).
2. The reinforced concrete bridge member tensioning and destabilizing device according to claim 1, characterized in that: the stabilizing beam (2) is formed by longitudinally splicing bailey frames.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910191487.9A CN109811660B (en) | 2019-03-14 | 2019-03-14 | Device for preventing instability of tensioning of reinforced concrete bridge member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910191487.9A CN109811660B (en) | 2019-03-14 | 2019-03-14 | Device for preventing instability of tensioning of reinforced concrete bridge member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109811660A CN109811660A (en) | 2019-05-28 |
| CN109811660B true CN109811660B (en) | 2024-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910191487.9A Active CN109811660B (en) | 2019-03-14 | 2019-03-14 | Device for preventing instability of tensioning of reinforced concrete bridge member |
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| CN (1) | CN109811660B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100785634B1 (en) * | 2006-10-30 | 2007-12-12 | 장신찬 | Continuation structure of prestressed concrete composite beam bridge and method thereof |
| CN203096742U (en) * | 2013-01-29 | 2013-07-31 | 浙江华铁建筑安全科技股份有限公司 | Difunctional supporting hanging plate |
| CN104790677A (en) * | 2015-05-07 | 2015-07-22 | 中建钢构有限公司 | Anti-unstability adjustable temporary connecting beam for installation of super-long small-section steel column of steel structure |
| CN206693645U (en) * | 2017-05-03 | 2017-12-01 | 浙江中南建设集团钢结构有限公司 | A kind of interim tie-rod device of steel truss structure installation |
| CN206971230U (en) * | 2017-05-31 | 2018-02-06 | 中国建筑第八工程局有限公司 | The supporting construction of Horizontal steelwork bracing in deep basal pit assembled type steel support system |
| CN208039267U (en) * | 2018-04-02 | 2018-11-02 | 中国兵器工业北方勘察设计研究院有限公司 | A kind of support connection structure of subway foundation pit steel purlin |
| CN208266881U (en) * | 2018-04-19 | 2018-12-21 | 浙江华铁建筑安全科技股份有限公司 | A kind of reinforcement support hanging plate |
| CN210238295U (en) * | 2019-03-14 | 2020-04-03 | 中铁十六局集团第三工程有限公司 | Reinforced concrete bridge member stretch-draw unstability device of preventing |
-
2019
- 2019-03-14 CN CN201910191487.9A patent/CN109811660B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100785634B1 (en) * | 2006-10-30 | 2007-12-12 | 장신찬 | Continuation structure of prestressed concrete composite beam bridge and method thereof |
| CN203096742U (en) * | 2013-01-29 | 2013-07-31 | 浙江华铁建筑安全科技股份有限公司 | Difunctional supporting hanging plate |
| CN104790677A (en) * | 2015-05-07 | 2015-07-22 | 中建钢构有限公司 | Anti-unstability adjustable temporary connecting beam for installation of super-long small-section steel column of steel structure |
| CN206693645U (en) * | 2017-05-03 | 2017-12-01 | 浙江中南建设集团钢结构有限公司 | A kind of interim tie-rod device of steel truss structure installation |
| CN206971230U (en) * | 2017-05-31 | 2018-02-06 | 中国建筑第八工程局有限公司 | The supporting construction of Horizontal steelwork bracing in deep basal pit assembled type steel support system |
| CN208039267U (en) * | 2018-04-02 | 2018-11-02 | 中国兵器工业北方勘察设计研究院有限公司 | A kind of support connection structure of subway foundation pit steel purlin |
| CN208266881U (en) * | 2018-04-19 | 2018-12-21 | 浙江华铁建筑安全科技股份有限公司 | A kind of reinforcement support hanging plate |
| CN210238295U (en) * | 2019-03-14 | 2020-04-03 | 中铁十六局集团第三工程有限公司 | Reinforced concrete bridge member stretch-draw unstability device of preventing |
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| CN109811660A (en) | 2019-05-28 |
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