CN103103924B - Angle self-adaptation beam bridge vertical prestressing force tensioning counter-force seat - Google Patents
Angle self-adaptation beam bridge vertical prestressing force tensioning counter-force seat Download PDFInfo
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- CN103103924B CN103103924B CN201310024452.9A CN201310024452A CN103103924B CN 103103924 B CN103103924 B CN 103103924B CN 201310024452 A CN201310024452 A CN 201310024452A CN 103103924 B CN103103924 B CN 103103924B
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- force
- vertical prestressing
- top board
- baseboard
- counter
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Abstract
Te invention relates to an angle self-adaptation beam bridge vertical prestressing force tensioning counter-force seat, and belongs to the technical field of bridge construction. The angle self-adaptation beam bridge vertical prestressing force stretch-draw counter-force seat comprises a top board, force transferring boards and a baseboard. The top board is connected with the baseboard through the two vertical force transferring boards to form a closed force body. An upper rib penetrating hole and a lower rib penetrating hole are respectively formed in the top board and the baseboard, and the upper rib penetrating hole is larger than the lower rib penetrating hole, and spaces among the top board, the baseboard and the force transferring boards are used for carrying out anchoring operation of vertical prestressing reinforcing bars. The baseboard is a round-curved surface, and a tangent value of a half of a curved-surface central angle of the round-curved surface is larger than friction coefficient of the baseboard and concrete. The angle self-adaptation beam bridge vertical prestressing force stretch-draw counter-force seat is simple in structure, low in cost and convenient to construct, and fundamentally solves the problem that when a conventional bridge carries out vertical prestressing tensioning construction, due to the fact that a lifting jack can not adjust a tensioning tilt angle, friction force between the vertical prestressing ribs and the inner wall of a hole channel can be generated so that larger prestressing loss can be caused.
Description
Technical field
The present invention relates to a kind of servicing unit of vertical prestressing stretching construction, be applicable to bridge vertical prestressing construction and other may carry out fining twisted steel stretching construction.This device, when stretch-draw vertical prestressing, can adjust the loading direction of jack automatically according to the angle of inclination of vertical prestressing bar, make it the differing tilt angles adapting to presstressed reinforcing steel, improve the efficiency of construction of stretch-draw vertical prestressing bar and prestressed stretch-draw quality.
Background technology
Upper and lower two compression faces of tradition vertical prestressing stretch-draw counter-force seat are planes, and the angle between upper and lower two compression faces is fixing, automatically cannot adjust the loading direction of jack according to the differing tilt angles of presstressed reinforcing steel when carrying out vertical prestressing stretch-draw, inevitably cause the extruding between presstressed reinforcing steel and prestressed pore passage, and then produce larger frictional force, larger adverse effect is produced to the applying of effective prestress, even if complete stretch-draw also can produce larger loss of prestress because of frictional force.
Summary of the invention
The object of the invention is to provide the counter-force seat that a kind of cheap, structure is simple, automatically can adapt to the stretch-draw of differing tilt angles vertical prestressing bar.Utilize the present invention can overcome the above-mentioned shortcoming and defect of conventional vertical prestressing stretch-draw counter-force seat; Can automatically adjust jack tension direction when the angle of inclination of vertical prestressing bar is different, make jack tension power consistent with presstressed reinforcing steel direction, solve conventional vertical prestressing bar stretch-draw counter-force seat can only apply stretching force defect according to fixed angle.
Technical solution of the present invention is: comprise top board (1), force transmitting board (2) and base plate (3), top board (1) and base plate (3) are connected to form closed beaer by two pieces of vertical force transmitting boards (2), top board (1) and base plate (3) are respectively equipped with wear muscle hole (4) and under wear muscle hole (5), under wear muscle hole (5) than on to wear muscle hole (4) large, top board (1), space between base plate (3) and force transmitting board (2) is for carrying out the anchoring operation of vertical prestressed reinforcement, it is characterized in that: base plate (3) is round surface, the tangent value of 1/2nd curved surface central angles of round surface is greater than base plate (3) and concrete friction factor.
And the base plate transmitting the counter-force seat of stretching force between beam body is curved surface and leaves enough vertical prestressing bars and passes down and wear muscle hole, the jack of stretch-draw vertical prestressing bar settled by counter-force seat top board, and leave equally and wear muscle hole, counter-force seat top board is connected by two pieces of force transmitting boards with between base plate, and sufficient space is left for presstressed reinforcing steel anchoring operation in centre.
The operating principle of described device is as follows:
The base plate that counter-force seat of the present invention contacts with case top surface of the beam is curved surface, when inconsistent by the angle between the vertical prestressing bar of stretch-draw and the top board of counter-force seat, this device can adjust the angle that jack loads automatically, to ensure that stretching force is consistent with vertical prestressing bar axis.
Beneficial effect
Research and develop the vertical prestressing bar stretch-draw counter-force seat that a kind of cheap, structure is simple, automatically can adapt to differing tilt angles, solve because conventional stretch-draw counter-force seat cannot adapt to vertical prestressing bar angle of inclination error automatically, jack can only be installed fixed angle and apply stretching force, the vertical prestressing bar brought and the larger frictional force of counter-force seat inwall, and make troubles to vertical prestressing construction and the problem of extra loss of prestress.
Accompanying drawing explanation
Fig. 1, counter-force holder structure schematic diagram;
Fig. 2, counter-force seat application schematic diagram;
Wherein:
1-top board
The vertical force transmitting board of 2-
3-base plate
4-wears muscle hole
Muscle hole is worn under 5-
Detailed description of the invention
Be described in further detail below in conjunction with embodiment and accompanying drawing, but not as a limitation of the invention.
The structure of the present embodiment as shown in Figure 1, a kind of angle self adaptation bridge vertical prestressing stretch-draw counter-force seat.Comprise top board (1), vertical force transmitting board (2), base plate (3), on wear muscle hole (4) and under wear muscle hole (5).The order of this device stretch-draw vertical prestressing is utilized to be: the case top surface of the beam near cleaning vertical prestressing bar, and stretch-draw work nut is installed thereon, then counter-force seat of the present invention is installed, requirement makes the curved surface base plate of counter-force seat down, contact surface is formed with case top surface of the beam, following installation stretch-draw jack, and tension tool nut is installed, prestressed reinforcement pass down successively wear muscle hole (5) and on wear muscle hole (4) by jack tension, locking, jack oil return, remove jack and counter-force seat, stretch-draw terminates.
Base plate (3) is round surface, and the tangent value of 1/2nd curved surface central angles of round surface is greater than base plate (3) and concrete friction factor.It is to make base plate (3) slide that the tangent value of 1/2nd curved surface central angles of round surface is greater than base plate (3) with concrete friction factor.
During vertical prestressing stretch-draw, vertical prestressing bar pass down wear muscle hole (5) and on wear muscle hole (4), by the jack tension be installed on counter-force seat top board (1).Angle self adaptation curved surface base plate (3) contacts the counter-force transmitted prestressed stretch-draw and produce with case top surface of the beam.Because the contact surface of counter-force seat and case top surface of the beam is curved surface, can ensure that the stretching force direction of jack adapts to the angle of inclination of vertical prestressing bar automatically, make stretching force consistent with presstressed reinforcing steel axis direction.
The above; it is only preferred embodiment of the present invention; not any pro forma restriction is done to the present invention; anyly do not depart from technical solution of the present invention content; according to technical spirit of the present invention; any amendment done within the spirit and principles in the present invention, equivalent variations and modification, all should be considered as the technology category of the present invention program, all should be included in protection scope of the present invention.
Claims (1)
1. an angle self adaptation beam bridge vertical prestressing stretch-draw counter-force seat, comprise top board (1), force transmitting board (2) and base plate (3), top board (1) and base plate (3) are connected to form closed beaer by two pieces of vertical force transmitting boards (2), top board (1) and base plate (3) are respectively equipped with wear muscle hole (4) and under wear muscle hole (5), under wear muscle hole (5) than on to wear muscle hole (4) large, top board (1), space between base plate (3) and force transmitting board (2) is for carrying out the anchoring operation of vertical prestressed reinforcement, it is characterized in that: base plate (3) is round surface, the tangent value of 1/2nd curved surface central angles of round surface is greater than base plate (3) and concrete friction factor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310024452.9A CN103103924B (en) | 2013-01-22 | 2013-01-22 | Angle self-adaptation beam bridge vertical prestressing force tensioning counter-force seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310024452.9A CN103103924B (en) | 2013-01-22 | 2013-01-22 | Angle self-adaptation beam bridge vertical prestressing force tensioning counter-force seat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103103924A CN103103924A (en) | 2013-05-15 |
| CN103103924B true CN103103924B (en) | 2015-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310024452.9A Expired - Fee Related CN103103924B (en) | 2013-01-22 | 2013-01-22 | Angle self-adaptation beam bridge vertical prestressing force tensioning counter-force seat |
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| Country | Link |
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| CN (1) | CN103103924B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009167653A (en) * | 2008-01-15 | 2009-07-30 | Daiwa House Industry Co Ltd | Prestressing bar tensioner |
| JP2010007248A (en) * | 2008-06-24 | 2010-01-14 | Shimizu Corp | Prestress tension device and tensioning force control method using the same |
| CN201730344U (en) * | 2010-04-16 | 2011-02-02 | 中国一冶集团有限公司 | Mobile simple device for adjusting angle of tensioning frame |
| CN201874246U (en) * | 2010-09-26 | 2011-06-22 | 北京华泰天成科技发展有限公司 | Prestressed tendon tensioning device |
| CN102182146A (en) * | 2011-03-29 | 2011-09-14 | 中国铁道科学研究院铁道建筑研究所 | Prestress rib tensioning equipment, system and method and concrete continuous box girder |
| CN202017304U (en) * | 2011-02-15 | 2011-10-26 | 全恩懋 | Automatic centering tensioning anchoring device for prestress sheet material clamp type anchor |
| CN202090290U (en) * | 2011-05-20 | 2011-12-28 | 中国十九冶集团有限公司 | Tool for tensioning prestressing steel bar |
| CN202248934U (en) * | 2011-10-13 | 2012-05-30 | 中土木（北京）技术检测有限公司 | Vertical pre-stressed reinforcing steel tension frame |
| CN202467217U (en) * | 2012-03-09 | 2012-10-03 | 杭州图强工程材料有限公司 | Prestress tension clamp |
-
2013
- 2013-01-22 CN CN201310024452.9A patent/CN103103924B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009167653A (en) * | 2008-01-15 | 2009-07-30 | Daiwa House Industry Co Ltd | Prestressing bar tensioner |
| JP2010007248A (en) * | 2008-06-24 | 2010-01-14 | Shimizu Corp | Prestress tension device and tensioning force control method using the same |
| CN201730344U (en) * | 2010-04-16 | 2011-02-02 | 中国一冶集团有限公司 | Mobile simple device for adjusting angle of tensioning frame |
| CN201874246U (en) * | 2010-09-26 | 2011-06-22 | 北京华泰天成科技发展有限公司 | Prestressed tendon tensioning device |
| CN202017304U (en) * | 2011-02-15 | 2011-10-26 | 全恩懋 | Automatic centering tensioning anchoring device for prestress sheet material clamp type anchor |
| CN102182146A (en) * | 2011-03-29 | 2011-09-14 | 中国铁道科学研究院铁道建筑研究所 | Prestress rib tensioning equipment, system and method and concrete continuous box girder |
| CN202090290U (en) * | 2011-05-20 | 2011-12-28 | 中国十九冶集团有限公司 | Tool for tensioning prestressing steel bar |
| CN202248934U (en) * | 2011-10-13 | 2012-05-30 | 中土木（北京）技术检测有限公司 | Vertical pre-stressed reinforcing steel tension frame |
| CN202467217U (en) * | 2012-03-09 | 2012-10-03 | 杭州图强工程材料有限公司 | Prestress tension clamp |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103103924A (en) | 2013-05-15 |
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Effective date of registration: 20160712 Address after: 100023, Beijing, Chaoyang District Shun Road, No. 12, turbot Pioneer Park, B building, 3 floor Patentee after: Beijing flounder Engineering Consulting Co., Ltd. Address before: 100124 Chaoyang District, Beijing Ping Park, No. 100 Patentee before: Beijing University of Technology |
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| CB03 | Change of inventor or designer information |
Inventor after: Zhang Wenxue Inventor after: Fan Baofeng Inventor after: Yan Wenkai Inventor after: Liu Ji Inventor after: Zheng Xiaolei Inventor before: Zhang Wenxue Inventor before: Wei Zanyang Inventor before: Wang Xiuping Inventor before: Ma Hongjian Inventor before: Huang Jian |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150121 Termination date: 20190122 |
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| CF01 | Termination of patent right due to non-payment of annual fee |