CN102995553B - Arch rib of reinforced concrete arch bridge and erection support and manufacture method of arch rib - Google Patents
Arch rib of reinforced concrete arch bridge and erection support and manufacture method of arch rib Download PDFInfo
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- CN102995553B CN102995553B CN201210486979.9A CN201210486979A CN102995553B CN 102995553 B CN102995553 B CN 102995553B CN 201210486979 A CN201210486979 A CN 201210486979A CN 102995553 B CN102995553 B CN 102995553B
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Abstract
The invention discloses a manufacture method of a reinforced concrete arch rib. The manufacture method can be applied to manufacture and erection of the arch rib of conventional reinforced concrete bridge and the arch rib of a reinforced concrete tied-arch bridge, and can improve the stability of an arch rib support during erecting the arch rib and after erecting and positioning the arch rib, as well as ensuring the safety in erecting of the arch rib. The arch rib disclosed by the invention comprises an arch rib body; a thrust switching support saddle is arranged in a position, corresponding to the arch rib support, of the arch rib body. The erection support is provided with an I-shaped support body, and the upper end surface of the erection support is a horizontal plane; and the support body is welded at the top part of the arch rib support and is in horizontal contact with a bottom plate of the thrust switching support saddle. The manufacture method of the arch rib comprises the following steps in sequence: pouring concrete in positions, corresponding to the arch rib support, at two ends of the arch rib body in order to fix embedded steel bars; marking a vertical line which is only formed after the arch rib main body is erected on the arch rib body before the erection is carried out; and welding the bottom plate with the lower ends of the embedded steel bars. By adopting the manufacture method, the safety in construction can be improved, and the risk in construction can be avoided.
Description
Technical field
The present invention relates to arch rib and the manufacture method of reinforced concrete arch bridge, particularly a kind of preparation method of reinforced concrete arch bridge arch rib, can be used for making and the installation of ordinary reinforced concrete arch rib and steel concrete bowstring arch bridge arch rib, the stability that improves arch rib support in arch rib installation process and after installation in position, ensures the safety that arch rib is installed.
Background technology
Ordinary reinforced concrete arch bridge and steel concrete bowstring arch bridge all belong to reinforced concrete arch bridge.At present, in the installation process of reinforced concrete arch bridge arch rib and steel concrete bowstring arch bridge arch rib, the abutting joint of arch rib and arch rib support is a construction technology difficult problem, there is no special processing method, generally arch rib is not processed and is directly placed on arch rib support.This form of construction work, because arc rib alignment is arch, the interaction force of arch rib and arch rib support is along the normal direction of arch rib camber line, and this has just caused the interaction force that has horizontal direction between arch rib and arch rib support.When arch rib is installed, it is little and arch rib support is existed to the thrust of along continuous straight runs with the contact surface of arch rib support, is unfavorable for the stability of arch rib support, has potential safety hazard and great construction risk.Because exist very high risk, ensure that arch rib is installed stable, the steadiness of arch rib support is required just higher.In the time of arch rib Rig up error, there is the danger of collapsing in arch rib support, and this problem affects construction speed and the construction quality of reinforced concrete arch bridge always.Reinforced concrete arch bridge need to improve the structure of arch rib, reduces the installation risk of ordinary reinforced concrete arch bridge and steel concrete bowstring arch bridge arch rib.
Summary of the invention
The object of this invention is to provide a kind of preparation method of reinforced concrete arch bridge arch rib, overcome the defect of prior art, solve traditional arch rib the bad problem of stability is installed, improve working security and workmanship.
The present invention is achieved in that
A preparation method for reinforced concrete arch bridge arch rib is provided with thrust conversion bearing on the position of arch rib body installation corresponding to arch rib support; Thrust conversion bearing comprises embedded bar and base plate, and embedded bar is fixed in arch rib body, base plate is welded on to the lower end of embedded bar; The installation site of corresponding arch rib support at arch rib body two ends, embedded bar is fixed in concreting; By measuring the vertical curve after unwrapping wire is installed arch rib body, before installation, be indicated on arch rib body, the horizontal line of striking in the bottom of embedded bar according to the angle vertical with this vertical curve, cutting embedded bar, then by the lower end welding of base plate and embedded bar.
Remarkable result of the present invention is as follows.Application the present invention has significantly improved the stability that reinforced concrete arch bridge arch rib is installed.By fix embedded bar on arch rib body, and then weld base plate on the basis of embedded bar, while making in the future arch rib installation in position, the installation site at two ends is horizontal level, and the contact surface of arch rib and arch rib support is converted into horizontal plane.Like this, arch rib to the active force of arch rib support perpendicular to horizontal contact surface, active force straight down, do not exist the thrust in arch rib support level direction, eliminate the interaction force in horizontal direction between arch rib and arch rib support, ensured the stability that arch rib is installed, greatly improved the safety of construction, avoid corresponding construction risk, improved the construction quality of engineering simultaneously.Because the installation of arch rib is convenient in the present invention, can also the reduction of erection time, improve project benefit.
Brief description of the drawings
Fig. 1 is the structural representation of arch rib of the present invention and erection support.
Fig. 2 is the stressed effect figure using after arch rib of the present invention is installed.
Detailed description of the invention
Below in conjunction with accompanying drawing in detail the present invention is described in detail, referring to Fig. 1.
A kind of reinforced concrete arch bridge arch rib, comprises arch rib body 3, is provided with thrust conversion bearing on the position of arch rib body 3 installation corresponding to arch rib support 5.Thrust conversion bearing comprises embedded bar 1 and base plate 2, and the lower surface of base plate 2 is horizontal planes, and embedded bar 1 is fixed in arch rib body 3, base plate 2 is welded on to the lower end of embedded bar 1.Base plate 2 is circular, square or polygon, and its thickness is set between 10mm-100mm; Base plate 2 is exactly the angle of arch body 1 with the angle of arch rib body 3.The diameter of embedded bar 1 is set between 20mm-60mm.According to the sum of its diameter design embedded bar 1, diameter is larger, and the radical of its embedded bar 1 is fewer.
The erection support of arch rib, its seat body 4 is work bodies, and its upper surface is horizontal plane, and the top that a seat body 4 is welded on to arch rib support 5 contacts with base plate 2 levels of thrust conversion bearing.The external shape of seat body 4 top plate bodys can be identical or different with base plate 2, and its diameter or area can be identical with base plate 2 or be greater than base plate 2.
A preparation method for reinforced concrete arch bridge arch rib is provided with thrust conversion bearing on the position of arch rib body 3 installation corresponding to arch rib support 5; Thrust conversion bearing comprises embedded bar 1 and base plate 2, and embedded bar 1 is fixed in arch rib body 3, base plate 2 is welded on to the lower end of embedded bar 1; In the installation site of the corresponding arch rib support 5 in arch rib body 3 two ends, embedded bar 1 is fixed in concreting; By measuring the vertical curve after unwrapping wire is installed arch rib body 3, before installation, be indicated on arch rib body 3, the horizontal line of striking in the bottom of embedded bar 1 according to the angle vertical with this vertical curve, cutting embedded bar 1, then the lower end welding with embedded bar 1 by base plate 2.The bearing capacity of base plate 2 should be greater than 4-6 times of arch rib body 3 weight.
Embedded bar 1 bulk strength should meet formula: SNf σ c>kF;
In formula:
The single cross-sectional area of S-embedded bar 1;
Total radical of N-embedded bar 1;
The single standard shear strength value of f σ c-embedded bar 1;
K-thrust conversion bearing safety factor, k >=5;
F-embedded bar 1 contacts mid-point computation horizontal thrust with arch rib body 3.
Embedded bar 1 compressive strength should meet formula: SNf σ bc>kG;
In formula:
The single cross-sectional area of S-embedded bar 1;
Total radical of N-embedded bar 1;
F σ bc-embedded bar 1 single compression strength value;
K-thrust conversion bearing safety factor, k >=5;
The gravity of G-arch rib body 3.
Referring to Fig. 2, when the arch rib of reinforced concrete arch bridge is installed, as long as the thrust conversion base plate 2 of bearing at arch rib body 3 two ends and the erection support at arch rib support 5 tops propped up to a seat body 4 placement of aliging.The active force straight up that in Fig. 2, a P representative seat body 4 produces base plate 2; G represents the gravity of arch rib body 3.After base plate 2 aligns with a seat body 4, the thrust that arch rib body 3 produces arch rib support 5 has just become active force straight down, has ensured the stability of arch rib, has reduced construction risk.
Claims (4)
1. a preparation method for reinforced concrete arch bridge arch rib is provided with thrust conversion bearing on the position of arch rib body (3) and the corresponding installation of arch rib support (5); Thrust conversion bearing comprises embedded bar (1) and base plate (2), and embedded bar (1) is fixed in arch rib body (3), base plate (2) is welded on to the lower end of embedded bar (1); The installation site of corresponding arch rib support (5) at arch rib body (3) two ends, embedded bar (1) is fixed in concreting; By measuring the vertical curve after unwrapping wire is installed arch rib body (3), before installation, be indicated on arch rib body (3), the horizontal line of striking in the bottom of embedded bar (1) according to the angle vertical with this vertical curve, cutting embedded bar (1), then the lower end welding with embedded bar (1) by base plate (2).
2. a kind of preparation method of reinforced concrete arch bridge arch rib according to claim 1, is characterized in that, the 4-6 that the bearing capacity of described base plate (2) should be greater than arch rib body (3) weight doubly.
3. according to the preparation method of a kind of reinforced concrete arch bridge arch rib described in claim 1 or 2, it is characterized in that, described embedded bar (1) bulk strength should meet formula: SNf σ c>kF;
In formula:
The single cross-sectional area of S-embedded bar (1);
Total radical of N-embedded bar (1);
The single standard shear strength of f σ c-embedded bar (1) value;
K-thrust conversion bearing safety factor, k >=5;
F-embedded bar (1) contacts mid-point computation horizontal thrust with arch rib body (3).
4. the preparation method of arch rib according to claim 3, is characterized in that, described embedded bar (1) compressive strength should meet formula: SNf σ bc>kG;
In formula:
The single cross-sectional area of S-embedded bar (1);
Total radical of N-embedded bar (1);
The single compression strength value of f σ bc-embedded bar (1);
K-thrust conversion bearing safety factor, k >=5;
The gravity of G-arch rib body (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210486979.9A CN102995553B (en) | 2012-11-27 | 2012-11-27 | Arch rib of reinforced concrete arch bridge and erection support and manufacture method of arch rib |
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| CN201210486979.9A CN102995553B (en) | 2012-11-27 | 2012-11-27 | Arch rib of reinforced concrete arch bridge and erection support and manufacture method of arch rib |
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| CN102995553A CN102995553A (en) | 2013-03-27 |
| CN102995553B true CN102995553B (en) | 2014-08-27 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821088B (en) * | 2014-02-13 | 2015-12-30 | 中铁四局集团第四工程有限公司 | Railway is grown up Arch rib positioning intelligent measure construction method |
| CN103866693B (en) * | 2014-03-13 | 2016-04-06 | 中石化胜利建设工程有限公司 | A kind of mounting method of steel concrete bowstring arch bridge arch rib |
| CN104532738B (en) * | 2014-12-24 | 2016-06-01 | 福州大学 | A kind of device and constructional method improving the horizontal anti-seismic performance of concrete T beam bridge |
| CN104963292B (en) * | 2015-07-17 | 2017-01-04 | 重庆标王集成房屋科技开发有限公司 | Construction method of reinforced concrete continuous-span arch bridge or continuous box structure bridge |
| CN108360389A (en) * | 2018-05-02 | 2018-08-03 | 长沙理工大学 | Inclined arch rib positioning device and positioning method |
| CN111608693B (en) * | 2020-06-02 | 2022-12-20 | 仲恺农业工程学院 | High-strength steel pipe concrete arch |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4143502A (en) * | 1975-07-14 | 1979-03-13 | Wyche Cyril T | Method of erecting a structural arch support |
| JPH10183999A (en) * | 1996-12-25 | 1998-07-14 | Okabe Co Ltd | Method of building movable form for arched concrete body |
| CN100357524C (en) * | 2005-09-26 | 2007-12-26 | 重庆交通学院 | Reinforcing method for long-span flat arch bridge |
| CN100590266C (en) * | 2007-12-27 | 2010-02-17 | 中铁四局集团有限公司 | Reverse-sequence dismantling method for prestressed concrete tied arch bridge |
| CN101481902A (en) * | 2009-01-21 | 2009-07-15 | 中铁三局集团有限公司 | V type pier inclined leg combined type support for continuous rigid frame bridge and layered cast-in-situ construction method |
| CN201933419U (en) * | 2011-03-03 | 2011-08-17 | 中铁一局集团有限公司 | Arch bridge arch rib cast-in-situ bracket |
| CN202284280U (en) * | 2011-10-19 | 2012-06-27 | 中铁四局集团第一工程有限公司 | Full space support construction beam body bottom plate inclined mold supporting pad structure |
| CN202954288U (en) * | 2012-11-27 | 2013-05-29 | 胜利油田胜利工程建设（集团）有限责任公司 | Reinforced concrete arch bridge arch rib and mounting support seat thereof |
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Address after: 257000 No. two, 755 North Road, Dongying District, Shandong, Dongying Patentee after: SINOPEC PETROLEUM CONSTRUCTION SHENGLI Corp. Address before: 257000 No. two, 755 North Road, Dongying District, Shandong, Dongying Patentee before: Shengli Oilfield Shengli Engineering Construction (Group) Co.,Ltd. |
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Effective date of registration: 20180131 Address after: 100101 Chaoyang District, Jilin City, Beijing mouth road, No. 9 Co-patentee after: SINOPEC PETROLEUM CONSTRUCTION SHENGLI Corp. Patentee after: SINOPEC OILFIELD SERVICE Corp. Address before: 257000 No. two, 755 North Road, Dongying District, Shandong, Dongying Patentee before: SINOPEC PETROLEUM CONSTRUCTION SHENGLI Corp. |