CN202323717U - Cantilever type pre-stress hoop and special tensioning device thereof - Google Patents
Cantilever type pre-stress hoop and special tensioning device thereof Download PDFInfo
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- CN202323717U CN202323717U CN2011204191495U CN201120419149U CN202323717U CN 202323717 U CN202323717 U CN 202323717U CN 2011204191495 U CN2011204191495 U CN 2011204191495U CN 201120419149 U CN201120419149 U CN 201120419149U CN 202323717 U CN202323717 U CN 202323717U
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- anchor ear
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Abstract
The utility model relates to a cantilever pre-stress bridge pier hoop device which belongs to a construction field of a city bridge or a highway bridge, in particular to a cantilever type pre-stress hoop for constructing a square, circular-end-shaped or reversed vase-shaped bridge pier cover beam, and a special tensioning device thereof. The cantilever type pre-stress hoop comprises cantilever type hoop brackets and pre-stress steel bars, wherein each bracket is provided with a though hole matched with each pre-stress steel bar and a component for anchoring each cantilever type hoop bracket and each pre-stress steel bar. When the cantilever type pre-stress hoop is used, the cantilever type pre-stress hoop is matched with the special tensioning device. The special tensioning device comprises a tensioning supporting cylinder, a connector, a through jack and a spreading steel bar for tensioning. According to the cantilever type pre-stress hoop and the special tensioning device thereof, the hoop brackets at two sides are oppositely pulled up through tensioning precisely-rolled deformed steel bars, and dead loads and construction loads of the whole cover beam are borne by friction force between a rubber skin of a pressure-bearing surface of each bracket and pier body concrete; and the whole device has the advantages of simple construction process, convenience for operation, reasonable structure stress, fewer steel amount, capability of being repeatedly and circularly used, short cycle of construction turnover and the like.
Description
Technical field
The utility model relates to a kind of cantilever prestressing force bridge pier anchor ear device in Urban Bridge or the highway bridge construction field, relates in particular to a kind of cantilevered prestressing force anchor ear and the special tensioner of square, nose circle shape or the type of falling vase bridge pier bent cap construction.
Background technology
When the construction of the substructure of bridge engineering, the bent cap of circular pier generally all adopts " anchor ear method " to construct, but that traditional ' circular anchor ear ' can't be applied to is square, the construction of nose circle shape and the type of falling vase bridge pier bent cap.The construction of existing square, nose circle shape and the type of falling vase bridge pier bent cap remains employing ' bowl button support is set up full framing ', ' shellfish thunder frame is set up full framing ' or adopts the construction technology of ' big steel pipe is set up the two cantilever supports of cantilever '.
Adopt the construction technology of bowl button support and Bei Lei frame, the support rental charge is higher, the time of support assembly unit and turnover is longer, is unfavorable for very much the cost control and the progress monitoring of object of construction production; And adopt the construction technology of ' big steel pipe set up cantilever two cantilever supports '; The support steel using amount is very big; The technology of assembly unit is comparatively loaded down with trivial details, the angle that this construction technology is installed the plan-position and the diagonal brace steel pipe of steel pipe, and the lower link point welding quality is had relatively high expectations on the steel pipe; General construction team has constructed not, so this construction technology is unfavorable for applying on a large scale.
Summary of the invention
The purpose of the utility model is the problem that the construction technology according to existing square, nose circle shape and the type of falling vase bridge pier bent cap exists; A kind of novel bent cap construction load carrier is provided; Be cantilevered prestressing force anchor ear device, and a kind of special tensioner that is used is provided simultaneously.
At first provide the structure of cantilevered prestressing force anchor ear, comprise cantilevered anchor ear bracket, prestressed reinforcement, cantilevered anchor ear bracket is provided with the through hole that cooperates with prestressed reinforcement and with the member of the two anchoring.
Such scheme also comprises following further improvement: described prestressed reinforcement is a finish rolling deformed bar, and its tensile property is better; Cantilevered anchor ear bracket pressure-bearing surface is provided with the rubber skin, and thickness is preferably and is 3mm, its can increase and concrete between frictional force, prevent the wearing and tearing of concrete external surface simultaneously; It is 4 or 6 that through hole on the cantilevered anchor ear bracket is preferably, and its performance can reach various construction environments basically.
We provide a kind of special tensioner that is applied to above-mentioned cantilevered prestressing force anchor ear then; Comprise that stretch-draw support tube, connector, punching jack, stretch-draw uses the spreading reinforcing bar; Wherein the stretch-draw support tube is between cantilevered anchor ear bracket and punching jack; Stretch-draw through connector and after the prestressed reinforcement reinforcing bar is connected, is passed terminal anchoring behind the punching jack with the spreading reinforcing bar; Described stretch-draw support tube is provided with the opening that is used for anchorage element on the fastening anchor ear.
Described stretch-draw is preferentially adopted finish rolling deformed bar with the spreading reinforcing bar.
The utility model has improved the construction technology of existing bridge substructure bent cap; Through the anchor ear bracket of stretch-draw fining twisted steel pull-up is come both sides; Frictional force between rubber that utilizes the bracket pressure-bearing surface and pier shaft concrete is born the deadweight and the working load of whole bent caps, thus whole device have construction technology simple and be convenient to operation, structure stress is reasonable, steel using amount is little; And can have enough to meet the need use repeatedly, advantages such as construction weak point cycle of turnover.Compare with existing construction technology; Can shorten the engineering time exponentially on the one hand; Favourable whole duration of a project control, one side significantly reduces steel using amount, manpower and other consumption of bent cap bearing system in addition, practices thrift a large amount of social resources; Meeting the principles and policies that nation-building conservation-minded society and low-carbon (LC) are built, also is the important embodiment of bridge construction sustainable development simultaneously.
Description of drawings
Fig. 1 is a cantilevered prestressing force anchor ear device mounting vertical plane sketch map;
Fig. 2 is that the cantilevered prestressing force anchor ear device of four prestressed reinforcements is installed side schematic view;
Fig. 3 is that the cantilevered prestressing force anchor ear device of six roots of sensation prestressed reinforcement is installed side schematic view;
Fig. 4 is the special tensioner tensile state sketch map of cantilevered prestressing force anchor ear device;
Fig. 5 is the stretching force calculation diagram of arm-type prestressing force anchor ear device;
Among the figure: 1, bent cap to be built, 2, bent cap soffit formwork supporting member, 3, load-bearing i iron longeron; 4, unload frame lumps of wood voussoir, 5, the inner prestress steel duct of reserving of pier shaft, 6, prestressing force finish rolling deformed bar, supporting anchor plate and anchoring nut 7, cantilevered anchor ear steel corbel; 8, the steel corbel pressure-bearing surface is pasted 3mm rubber skin, and 9, fluid concrete bridge pier, 10, the stretch-draw support tube; 11, finish rolling deformed bar connector, 12, YDC-650 type punching jack, 13, stretch-draw uses the spreading finish rolling deformed bar; 14, moveable anchor backing plate, 15, work anchoring nut, 16, the jack oil pipe.
The specific embodiment
Below in conjunction with Fig. 1-5 and instantiation the utility model is described further, but not as the qualification of the utility model.
At first provide a kind of cantilevered prestressing force anchor ear device, its structure comprises cantilevered anchor ear steel corbel 7, prestressing force fining twisted steel, supporting anchor plate and anchoring nut 6, inner prestressed reinforcement duct 5 and the steel corbel pressure-bearing surface stickup 3mm rubber skin 8 reserved of pier shaft.
The structural form of cantilevered anchor ear steel corbel 7 is calculated total load according to single steel corbel and is selected for use; Single steel corbel total load 200KN ~ 350KN selects the cantilevered prestressing force anchor ear device of four fining twisted steels; Total load 350KN ~ 550KN selects the cantilevered prestressing force anchor ear device of six roots of sensation fining twisted steel for use, and total load then can be realized with the basis that increases fining twisted steel according to same principle increasing steel corbel size greater than 550KN's.Cantilevered anchor ear steel corbel 7 by the unit that possesses steel work processing qualification according to the design drawing processing and fabricating.
The reserving hole channel 5 of pier shaft 9 inside according to the position and the quantity of anchor ear Design of device, is reserved with the pvc pipe of φ 50mm when pier construction.After cantilevered anchor ear bracket 7 machines, 3mm rubber skin 8 is pasted on the pressure-bearing surface of anchor ear bracket with epoxy resin.
The key step that cantilevered prestressing force anchor ear device is installed: cooperate lifting Cantilever Type Steel anchor ear 7 to design attitude with the automobile loop wheel machine earlier; The prestressed fining twisted steel 6 again, and tentatively tighten, and fining twisted steel connector 11 is installed then; Spreading stretch-draw is with fining twisted steel 13; Stretch-draw support tube 10 and YDC-650 type punching jack 12, work anchor backing plate 14 and work anchoring nut 15 are installed, are connected jack oil pipe 16 at last, start oil pump stretch-draw fining twisted steel to designing pulling force; And, promptly accomplish tension operation with spanner or the fastening anchoring nut of other instruments; Send the jack other finish rolling deformed bar of stretch-draw after the same method then.
After the installation of cantilevered prestressing force anchor ear device, install and unload frame lumps of wood voussoir 4, load-bearing i iron longeron 3, bent cap soffit formwork supporting member 2, then implement the construction of bent cap 1 then according to current techique.
Except that the described technical characterictic of this manual, be the known technology of those skilled in the art.
For the novel technique effect of this use better is described, below provide the performance data and the computational methods of the utility model.
1, under single anchor ear construction total load 200KN ~ 550KN effect, cantilevered prestressing force anchor ear device stretching force and tension stress data computation and value, among Fig. 5:
The total load of N-----bent cap cast-in-place construction: concrete, template and i iron longeron, and the construction mobile load etc.;
The pulling force that F-----bent cap working load produces last row's fining twisted steel;
The spacing of h-----two rows prestressing force fining twisted steel is according to square anchor ear structure design scheme, h=224mm=0.224m.
E-----bent cap construction load is apart from the eccentric distance (wherein b is the i iron width for 1/2 of the i iron longeron width of transmission bent cap vertical load, e=b/2) of pier stud; During construction; Generally select I 45～I 56 for use, flange width b=150 ~ 170mm is so select average when calculating; Be b=160mm, so e=160/2=80mm=0.08m.
2, bent cap construction total load calculates the pulling force that fining twisted steel produces
According to the moment of flexure equilibrium principle, set up the tensile force f that equation calculates the row's of going up fining twisted steel:
The tensile force f 1 that single fining twisted steel bears:
N-----is the radical of single fining twisted steel in the formula.According to square pier stud anchor ear design scheme, n=3 or 6.
3, under single anchor ear construction total load 200KN ~ 550KN effect, cantilevered prestressing force anchor ear device stretching force and tension stress data, see table 1, table 2:
Fining twisted steel stretching force result of calculation under table 1 200KN ~ 350KN load action
(4 fining twisted steel reinforcing bars, μ=0.65, A=490.625mm
2)
Fining twisted steel stretching force result of calculation under table 2 400KN ~ 550KN load action
(4 fining twisted steel reinforcing bars, μ=0.65, A=490.625mm
2)
Claims (7)
1. cantilevered prestressing force anchor ear is characterized in that: comprise cantilevered anchor ear bracket, prestressed reinforcement, cantilevered anchor ear bracket is provided with the through hole that cooperates with prestressed reinforcement and with the member of the two anchoring.
2. cantilevered prestressing force anchor ear according to claim 1 is characterized in that: described prestressed reinforcement is a finish rolling deformed bar.
3. cantilevered prestressing force anchor ear according to claim 1 and 2 is characterized in that: said cantilevered anchor ear bracket pressure-bearing surface is provided with the rubber skin.
4. cantilevered prestressing force anchor ear according to claim 3 is characterized in that: said rubber skin thickness is 3mm.
5. cantilevered prestressing force anchor ear according to claim 4 is characterized in that: the through hole on the described cantilevered anchor ear bracket is 4 or 6.
6. the special tensioner of the described cantilevered prestressing force of claim 1-5 anchor ear is installed; It is characterized in that: comprise that stretch-draw support tube, connector, punching jack, stretch-draw uses the spreading reinforcing bar; Wherein the stretch-draw support tube is between cantilevered anchor ear bracket and punching jack; Stretch-draw through connector and after the prestressed reinforcement reinforcing bar is connected, is passed terminal anchoring behind the punching jack with the spreading reinforcing bar; Described stretch-draw support tube is provided with the opening that is used for anchorage element on the fastening anchor ear.
7. the special tensioner of cantilevered prestressing force anchor ear according to claim 6 is characterized in that: described stretch-draw uses the spreading reinforcing bar to be finish rolling deformed bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204191495U CN202323717U (en) | 2011-10-28 | 2011-10-28 | Cantilever type pre-stress hoop and special tensioning device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204191495U CN202323717U (en) | 2011-10-28 | 2011-10-28 | Cantilever type pre-stress hoop and special tensioning device thereof |
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| CN202323717U true CN202323717U (en) | 2012-07-11 |
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| CN2011204191495U Expired - Fee Related CN202323717U (en) | 2011-10-28 | 2011-10-28 | Cantilever type pre-stress hoop and special tensioning device thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726448A (en) * | 2013-12-20 | 2014-04-16 | 广西科技大学 | Prestress concrete beam construction tension process |
| CN105257321A (en) * | 2015-09-28 | 2016-01-20 | 上海市基础工程集团有限公司 | Shield tunnel initial-stage construction duct piece pulling connection device and construction method |
| CN106758848A (en) * | 2017-01-19 | 2017-05-31 | 浙江兴土桥梁专用装备制造有限公司 | For the vertical prestressing bar intelligent tensioning equipment and application method of bridge construction |
| CN107190980A (en) * | 2017-05-22 | 2017-09-22 | 海南职业技术学院 | Armored concrete bent cap non-stand construction method and constructing device on reinforced column |
| CN107386117A (en) * | 2017-07-26 | 2017-11-24 | 中交公局第二工程有限公司 | A kind of device of double rod iron method construction bridges bent caps |
| CN113512939A (en) * | 2021-03-12 | 2021-10-19 | 中铁十一局集团第一工程有限公司 | Continuous beam combined type shear key installation construction method and device |
-
2011
- 2011-10-28 CN CN2011204191495U patent/CN202323717U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726448A (en) * | 2013-12-20 | 2014-04-16 | 广西科技大学 | Prestress concrete beam construction tension process |
| CN105257321A (en) * | 2015-09-28 | 2016-01-20 | 上海市基础工程集团有限公司 | Shield tunnel initial-stage construction duct piece pulling connection device and construction method |
| CN105257321B (en) * | 2015-09-28 | 2018-05-04 | 上海市基础工程集团有限公司 | Shield tunnel construction at initial stage section of jurisdiction sockets device and construction method |
| CN106758848A (en) * | 2017-01-19 | 2017-05-31 | 浙江兴土桥梁专用装备制造有限公司 | For the vertical prestressing bar intelligent tensioning equipment and application method of bridge construction |
| CN106758848B (en) * | 2017-01-19 | 2024-03-12 | 浙江兴土桥梁专用装备制造有限公司 | Intelligent vertical prestressed reinforcement tensioning equipment for bridge construction and use method |
| CN107190980A (en) * | 2017-05-22 | 2017-09-22 | 海南职业技术学院 | Armored concrete bent cap non-stand construction method and constructing device on reinforced column |
| CN107386117A (en) * | 2017-07-26 | 2017-11-24 | 中交公局第二工程有限公司 | A kind of device of double rod iron method construction bridges bent caps |
| CN113512939A (en) * | 2021-03-12 | 2021-10-19 | 中铁十一局集团第一工程有限公司 | Continuous beam combined type shear key installation construction method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yan Haizhou Inventor after: Li Shouliang Inventor after: Yan Shuhong Inventor after: Cui Jiuliang Inventor after: Zhang Shaoquan Inventor before: Wang Weikai Inventor before: Li Shouliang |
|
| CB03 | Change of inventor or designer information | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170629 Address after: 257000, the Yellow River Road, Dongying District, Shandong City, Dongying Province, planning five West Road Science and technology enterprise accelerator E2-4-403 Patentee after: Shandong Keda infrastructure Co., Ltd. Address before: 257091 No. 65, front street, Dongying, Shandong Patentee before: Keda Group Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20191028 |
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| CF01 | Termination of patent right due to non-payment of annual fee |