CN201306005Y - Pre-tension broken-line reinforced bender - Google Patents
Pre-tension broken-line reinforced bender Download PDFInfo
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- CN201306005Y CN201306005Y CNU2008201413872U CN200820141387U CN201306005Y CN 201306005 Y CN201306005 Y CN 201306005Y CN U2008201413872 U CNU2008201413872 U CN U2008201413872U CN 200820141387 U CN200820141387 U CN 200820141387U CN 201306005 Y CN201306005 Y CN 201306005Y
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Abstract
The utility model relates to a device for precasting a beam bridge, in particular to a bender applied in a pre-tension broken-line reinforced pre-stressed concrete construction technology. The bender consists of a buried part of the bender, and a base of the bender. The buried part of the bender is provided with a roller with guiding function; and the base of the bender is connected with the buried part of the bender by a pin roll. The bender has simple structure, smaller size, less steel consumption and simple processing technique; broken-line ribs are bent upwards under the action of the roller; as the contact surface of the bender and pre-stressed ribs is in circular arc transition, the friction between the bender and the pre-stressed ribs is of the rolling friction, and the friction loss is less. The bender is suitable for bending 50m/1,200t level pre-stressed concrete beam broken-line reinforced ribs with construction procedures that the bender is cut off first and then broken-line ribs and straight-line ribs are released.
Description
Technical field
The utility model relates to the prefabricated equipment of a kind of beam bridge, and that uses in particularly a kind of pre-tensioning system broken-line reinforcement prestressed concrete construction technology bends up device.
Background technology
The precast beam of present domestic application has two classes, and the one, post-tensioned prestressing concrete beam (being called for short the posttension beam), the 2nd, pretensioning prestressed concrete beam (being called for short first Zhang Liang).The Zhang Liang of elder generation compares with the posttension beam, can avoid the posttension beam to influence many harm such as structure durability because of plug-hole, mud jacking leakiness, therefore first Zhang Liang has better durability than posttension beam, and the construction technology of first Zhang Liang is simple, operation is few, manufacturing speed is fast, safeguard that the maintenance work amount is little, also can save ground tackle, bellows, save the consumption of concrete, prestressed strand, reduce construction costs.But because existing first Zhang Liang adopts the straight line arrangement of reinforcement,, in longspan structure, be difficult to satisfy force request more, limited the range of application of first Zhang Liang though its technology is simple.Abroad begin one's study and make a kind of novel first Zhang Liang, be i.e. the Zhang Liang of broken-line reinforcement elder generation the sixties in last century.The Zhang Liang of broken-line reinforcement elder generation not only has the plurality of advantages of the Zhang Liang of straight line arrangement of reinforcement elder generation, and can reduce effectively beam-ends principal tensile stress, improve structural performance, improve the span of structure.Broken-line reinforcement is the development trend of first Zhang Liang.
It is one of critical component of realizing broken-line reinforcement pretensioning prestressed concrete construction technology that the pre-tensioning system broken-line reinforcement bends up device, and presstressed reinforcing steel is realized bending by the guide effect that bends up device.Existing pre-tensioning system broken-line reinforcement bends up device and mainly contains that roller type bends up device and drawplate type bends up device.Two kinds bend up device by imbedding beam body portion, U-shaped vertical shift sliding sleeve, base three part components.Roller type bends up part that device imbeds the beam body and is made up of arm-tie and the roller bearing that is arranged on the arm-tie, the broken line muscle bends up under the effect of roller bearing, owing to bend up device and presstressed reinforcing steel contact surface circular arc is excessive, the friction that bends up device and presstressed reinforcing steel is rolling friction, friction loss is less, but this structure that bends up device is complicated.Drawplate type bends up device, and to imbed the part of beam body be the arm-tie that is provided with reserving hole channel, the broken line muscle bends up under the effect of reserving hole channel, it is simpler that this bends up the device structure, but when the welding arm-tie, need two block plates are adopted the welding of quadrature " ten " word joint, welding procedure requires high, distortion is big, and bend up device and the non-circular arc of presstressed reinforcing steel contact surface is excessive, presstressed reinforcing steel is easily chewed by arm-tie in the stretching process, the presstressed reinforcing steel cross section weakens, reduce the safety of producing, the friction that bends up device and presstressed reinforcing steel is the face friction between static friction and dynamic friction, and friction loss is bigger, as steel plate hole circular arc excessively then being increased operation and difficulty of processing.
Because existing broken-line reinforcement pretensioning prestressed concrete construction technology is in putting a process of broken line muscle, adopt and to put a broken line muscle earlier and cut off the technology that bends up device again, after putting a broken line muscle, because prestressed effect, the trend of Liang Tiyou arch and compression, therefore, it is as far as possible little except needs satisfy frictional resistance to bend up device, outside the requirement that can rotate, also need to satisfy the micro-vertical shift of energy, the requirement of vertical constraint, therefore the existing device that bends up need adopt the heavy in section and U-shaped vertical shift sliding sleeve is set, make that to bend up the device steel using amount big, complex structure, and need to adopt heavy equalizer, cost of production height.Along with the increase of beam body span, the device that bends up with vertical shift function needs the bigger balance weight of tonnage and bends up device, can further increase cost of production.Calculating the 50mT beam by analysis calculates owing to bend up the pulling force that constraint B, the C point place of device respectively will increase about 34t.
Summary of the invention
The purpose of this utility model is to overcome the above-mentioned problems in the prior art, provide a kind of pre-tensioning system broken-line reinforcement simple in structure, that cost is low to bend up device, satisfying the needs that 50m/1200t level prestressed concrete beam broken-line reinforcement bends up, and can guarantee the safe, controlled of work progress.
The utility model realizes that the technical scheme of above-mentioned purpose is:
A kind of pre-tensioning system broken-line reinforcement bends up device, by bending up the device inlet part and bending up the device base and form, bends up the device inlet part and is provided with the roller bearing that play the guiding role, and bends up the device base and bends up the device inlet part and be connected by bearing pin.
The described device that bends up is that the two arm-ties of roller type bend up device, and inlet part is made up of two arm-ties, and the upper end of two arm-ties connects by a steel plate.
The lower end of two arm-ties is respectively equipped with pin shaft hole, and bearing pin passes arm-tie and with the pin shaft hole that bends up the setting of device base arm-tie is connected with base.
Bend up the device base and be anchored on the broken line muscle equalizer bar by pre-embedded bolt, steel strand pass and bend up the device arm-tie and bend up under the guide effect of roller bearing, and bending up the device arm-tie is disposable member, put Zhang Qianxu and cut off and bend up the device arm-tie.
It is one of critical component of realizing broken-line reinforcement pretensioning prestressed concrete construction technology that the pre-tensioning system broken-line reinforcement bends up device, and presstressed reinforcing steel is realized bending by the guide effect that bends up device.Because existing broken-line reinforcement pretensioning prestressed concrete construction technology is in putting a process of broken line muscle, adopt and put a broken line muscle earlier and cut off the technology that bends up device again, bend up device and need possess the vertical shift function.As shown in Figure 5, after putting a broken line muscle according to this technology, because prestressing force effect, the last trend that supplies and compress of Liang Tiyou, this moment since B, C place bend up device vertical effect of contraction, limited the vertical deformation of beam body, require B, C that downward tensile force f is provided at 2, inevitable requirement bends up device and adopts more heavy in section and heavier weight equalizer like this, calculates the 50mT beam by analysis and calculates owing to bend up the pulling force that constraint B, the C point place of device respectively will increase about 34t.So having the device that bends up of vertical shift function needs the bigger balance weight of tonnage and bends up device.The utility model is by to above-mentioned analysis of putting a process, by the analogue simulation test, working procedure is adjusted into to cut off earlier bends up device and puts a broken line muscle and straight line muscle again, bends up the device structure at this working procedure optimization.Because it is rolling friction that roller type bends up the friction of device and presstressed reinforcing steel, friction loss is less, so the device that bends up after optimizing adopts roller type to bend up device, form by inlet part and base two parts, bend up the device inlet part and be provided with the roller bearing that play the guiding role, the broken line muscle bends up under the effect of roller bearing, and the device that bends up of the present utility model only has rotating function, does not consider the vertical shift function.
After the utility model adopts said structure, has following beneficial effect: of the present utility modelly bend up that device is simple in structure, size is less, steel using amount is few, processing technology is simple, presstressed reinforcing steel bends up under the effect of roller bearing, owing to bend up device and presstressed reinforcing steel contact surface circular arc is excessive, the friction that bends up device and presstressed reinforcing steel is rolling friction, and friction loss is less.Be applicable to that working procedure is to cut off earlier to bend up device and put the needs that the 50m/1200t level prestressed concrete beam broken-line reinforcement of a broken line muscle and straight line muscle bends up again.
Description of drawings
Fig. 1, Fig. 2 are the existing structural representation that bends up device.
Fig. 3, Fig. 4 bend up the structural representation of device for the utility model.
Fig. 5 is put a process beam body deformability schematic diagram.
Mark among the figure: 1-bends up the device arm-tie, and 2-bends up the device base, the 3-roller bearing, and the 4-bearing pin, 5-pre-embedded bolt, 6-are opened Liang Liangti earlier, and 6 '-Free Transform is opened Liang Liangti, 7-presstressed reinforcing steel, 8-U shape vertical shift sliding sleeve earlier.
The specific embodiment
Below in conjunction with specific embodiment the present invention is described in further detail.
As shown in the figure, 50m pretensioning prestressed concrete T beam broken-line reinforcement bends up device, comprise and bend up device inlet part 1 and bend up device base 2, bend up device inlet part 1 for being embedded in the disposable member of opening earlier in the beam beam body 6, form by two arm-ties, the upper end of two arm-ties connects by a steel plate, bend up the device arm-tie and be provided with the roller bearing 3 that play the guiding role, bend up device base 2 and bend up the device inlet part and be connected by bearing pin 4, it is solid on the broken line muscle equalizer bar below the force-transmitting pole by pre-embedded bolt anchor 5 to bend up device base 2.
Two bend up the device arm-tie adopts the Q235 steel plate of δ=10mm to make, and the upper end of two arm-ties is welded as a whole by a steel plate; The lower end of two arm-ties is respectively equipped with the pin shaft hole of φ 66mm.Bending up device base 2 adopts thickness to be respectively the Q235 steel plate making of 30mm and 20mm; Each steel plate connects the welding of employing groove, is drilled with the pin shaft holes of φ 66mm in the middle of the base 2.The pin shaft hole of the pin shaft hole of base 2 and arm-tie 1 lower end is that the φ 65mmCr42 alloy bearing pin of 200mm is connected by length, makes to bend up device and possess rotating function.Bend up device base 2 and pass through pre-embedded bolt anchor 5 admittedly on broken line muscle equalizer bar, steel strand pass and bend up device arm-tie 1, bend up under the guide effect of roller bearing 3, bend up device arm-tie 1 and are disposable member, put the Zhang Qianxu cut-out and bend up the device arm-tie.
Test through the engineer testing beam, bend up device and rotate flexible, simple installation, the friction loss that bends up device of measurement and design load are coincide, and can bear working load, arch camber, elastic compression and the structural calculation of putting the Zhang Houliang body are more identical, whole construction course safety, controlled.Facts have proved that designed 50m pre-tensioning system broken-line reinforcement T beam bends up device and supporting with it stretch-draw, puts Zhang Gong's skill is safe, feasible, controlled.Owing to bend up the device cross section and reduce, the total steel using amount of device that bends up of rotatable, vertical shift reduces approximately 1/3～1/2, and broken line muscle balance weight also alleviates thereupon, has reduced cost of production.
Claims (3)
1, a kind of pre-tensioning system broken-line reinforcement bends up device, it is characterized in that: this bends up device and forms by bending up the device inlet part and bending up the device base, bend up the device inlet part and be provided with the roller bearing that play the guiding role, bend up the device base and bend up the device inlet part and be connected by bearing pin.
2, pre-tensioning system broken-line reinforcement according to claim 1 bends up device, it is characterized in that: the described device that bends up is that roller type bends up device, and the inlet part that bends up device is made up of two arm-ties, and the upper end of two arm-ties connects as one by a steel plate.
3, pre-tensioning system broken-line reinforcement according to claim 2 bends up device, it is characterized in that: the lower end of two arm-ties is respectively equipped with pin shaft hole, and bearing pin passes arm-tie and bends up the pin shaft hole that the device base is provided with, and arm-tie is connected with base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201413872U CN201306005Y (en) | 2008-11-13 | 2008-11-13 | Pre-tension broken-line reinforced bender |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201413872U CN201306005Y (en) | 2008-11-13 | 2008-11-13 | Pre-tension broken-line reinforced bender |
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| Publication Number | Publication Date |
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| CN201306005Y true CN201306005Y (en) | 2009-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201413872U Expired - Lifetime CN201306005Y (en) | 2008-11-13 | 2008-11-13 | Pre-tension broken-line reinforced bender |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251057A (en) * | 2014-08-20 | 2014-12-31 | 郑州市交通规划勘察设计研究院 | Arc bent plate type bender |
| CN107718268A (en) * | 2017-09-15 | 2018-02-23 | 柳州欧维姆机械股份有限公司 | The roller of pre-tensioning system broken-line reinforcement bends up device and the roller with Quick unhooking device bends up device |
| CN108643581A (en) * | 2018-07-06 | 2018-10-12 | 柳州欧维姆机械股份有限公司 | The non-font idler wheel of pre-tensioning system broken-line reinforcement bends up device |
| CN109571747A (en) * | 2018-11-23 | 2019-04-05 | 上海市政预制技术开发有限公司 | A kind of double T beam construction methods of broken line pretensioned prestressing |
-
2008
- 2008-11-13 CN CNU2008201413872U patent/CN201306005Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251057A (en) * | 2014-08-20 | 2014-12-31 | 郑州市交通规划勘察设计研究院 | Arc bent plate type bender |
| CN107718268A (en) * | 2017-09-15 | 2018-02-23 | 柳州欧维姆机械股份有限公司 | The roller of pre-tensioning system broken-line reinforcement bends up device and the roller with Quick unhooking device bends up device |
| CN107718268B (en) * | 2017-09-15 | 2023-04-18 | 柳州欧维姆机械股份有限公司 | Roller bending device for pre-tensioning broken line reinforcement and roller bending device with quick unhooking device |
| CN108643581A (en) * | 2018-07-06 | 2018-10-12 | 柳州欧维姆机械股份有限公司 | The non-font idler wheel of pre-tensioning system broken-line reinforcement bends up device |
| CN108643581B (en) * | 2018-07-06 | 2023-09-08 | 柳州欧维姆机械股份有限公司 | Pretensioned broken line reinforcement non-character type roller bending device |
| CN109571747A (en) * | 2018-11-23 | 2019-04-05 | 上海市政预制技术开发有限公司 | A kind of double T beam construction methods of broken line pretensioned prestressing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160105 Address after: Jinniu District Kam Tong Road Chengdu city Sichuan province 610031 No. 16 Patentee after: CHINA RAILWAY NO.2 BUREAU ENGINEERING CO., LTD. Address before: 610041 high building, No. nine Hing Road, Chengdu hi tech Development Zone, Sichuan, 6 Patentee before: China Railway Erju Co., Ltd. Patentee before: China Railway Erju 1st Engineering Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090909 |
|
| CX01 | Expiry of patent term |