CN106049282A - Method for tensioning and releasing hollow slab steel strands prefabricated through pre-tensioning method - Google Patents
Method for tensioning and releasing hollow slab steel strands prefabricated through pre-tensioning method Download PDFInfo
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- CN106049282A CN106049282A CN201610391392.8A CN201610391392A CN106049282A CN 106049282 A CN106049282 A CN 106049282A CN 201610391392 A CN201610391392 A CN 201610391392A CN 106049282 A CN106049282 A CN 106049282A
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- Prior art keywords
- crossbeam
- sandbox
- stretch
- steel strand
- tension
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention relates to a method for tensioning and releasing hollow slab steel strands prefabricated through a pre-tensioning method. A movable anchoring crossbeam is arranged at one ends of prefabrication pedestals, one end of each prestressed steel strand is anchored, and releasing sand boxes are arranged between the movable anchoring crossbeam and the prefabrication pedestals; and a tensioning crossbeam is arranged at the other ends of the prefabrication pedestals, a tension frame inner crossbeam is arranged on the inner side of the tensioning crossbeam and anchored to the other ends of the prestressed steel strands, a tension frame outer crossbeam is arranged on the outer side of the tensioning crossbeam, the tension frame inner crossbeam and the tension frame outer crossbeam are connected through screws penetrating the tensioning crossbeam, and tensioning jacks are arranged between the tensioning crossbeam and the tension frame outer crossbeam. In the tensioning process, the jacks are operated to jack the tension frame outer crossbeam to move to the outer side, the tension frame inner crossbeam is driven to move, and the steel strands are tensioned; and in the releasing process, sand in the releasing sand boxes is evenly discharged, pistons of the releasing sand boxes retract into steel sleeves, and therefore the steel strands are released.
Description
Technical field
The present invention relates to concrete core slab prefabricating technique field, be specifically related to a kind of pre-tensioned concrete hollow plate
Steel strand tension and put Zhang Fangfa.
Background technology
Pre-tensioned concrete hollow plate because its deadweight is little, convenient transportation, the suitability be strong, assemblingization degree high, extensively
Apply in bridges in highway engineering construction.The stretch-draw of prestress wire and put the important ring of Zhang Zuowei precast hollow slab construction
Joint, is also the cored slab key factor that has relatively high bearing capacity.The entitled " stretch-draw of pretensioned prestressing steel strand wires and putting
" document of (Chinese periodical " harbor work's technology ", in June, 2002, No.2) discloses a kind of stretch-draw and put Zhang Fangfa, such as Fig. 1 institute
Show, set fixed anchorage beam in precast pedestal 1 one end, for one end of anchoring prestress steel strand wires, the precast pedestal other end
If stretch-drawing beam, inside stretch-drawing beam, it is provided with crossbeam in tension frame, anchors with the prestress wire other end, outside stretch-drawing beam
If the outer crossbeam of tension frame, being connected by running through the screw rod of stretch-drawing beam in tension frame between crossbeam crossbeam outer with tension frame, screw rod exists
One section between stretch-drawing beam and the outer crossbeam of tension frame is provided with nut, sets stretch-draw very heavy between the outer crossbeam of stretch-drawing beam and tension frame
Top, during stretch-draw, realizes prestress wire stretch-draw by the jack piston outer cross beam movement of elongation pushing tow tension frame, and stretch-draw puts in place
After, the nut on screw rod is tightened to stretch-drawing beam, makes prestress steel twist line position fix；When putting, first by jack piston
Extending LAP again, in order to unclamped by nut, bounce back jack piston the most again, it is achieved puts and opens.Said method, jack is put
Also to extend LAP again due to piston when opening, easily cause super of steel strand wires and rupture, cause safe thing
Therefore and beam body damage.
Summary of the invention
A problem that present invention aims to exist when prestress wire stretch-draw in prior art is put, it is provided that one
Plant and overpull can be avoided to put the pre-tensioned concrete hollow plate stretch-draw opened and put Zhang Fangfa.
Technical scheme is as follows:
A kind of pre-tensioned concrete hollow plate steel strand tension and put Zhang Fangfa, it is characterised in that:
(1) portable anchorage beam is set in precast pedestal one end, one end of anchoring prestress steel strand wires, and at portable anchor
Gu arrange between crossbeam and precast pedestal and put a sandbox, described in put to be full of in a sandbox and put Zhang Sha；Put a sandbox include steel bushing and
The piston reciprocatingly slided along steel bushing inwall, the steel bushing one end putting a sandbox acts against on precast pedestal, puts the work of a sandbox
Plug one end acts against on portable anchorage beam；
(2) set stretch-drawing beam at the precast pedestal other end, inside stretch-drawing beam, set crossbeam in tension frame, with prestress steel twist
The line other end anchors, and sets the outer crossbeam of tension frame outside stretch-drawing beam, by running through between crossbeam and the outer crossbeam of tension frame in tension frame
The screw rod of stretch-drawing beam connects, and screw rod sets nut between the outer crossbeam of stretch-drawing beam and tension frame one section, stretch-drawing beam with
Stretch-draw jack is set between the outer crossbeam of tension frame；
(3), during stretch-draw, handle the outer crossbeam of jack pushing tow tension frame and move laterally, drive cross beam movement in tension frame,
To steel strand tension；Steel strand wires drive portable anchorage beam to move to precast pedestal direction simultaneously, make to put a sandbox stress quilt
Extruding；Steel strand tension, to after predetermined value, stops jack pushing tow, and is tightened to stretch-drawing beam by the nut on screw rod, make steel
Twisted wire positions；
(4) when putting, husky in a sandbox will be put uniformly release, put the piston of a sandbox to steel bushing contract, make to put
Extruding force suffered by sandbox is unloaded, and puts so that realizing steel strand wires.
The present invention uses sandbox to put, efficiently avoid when jack is put and easily occurs that super of steel strand wires occurs
Fracture, it is to avoid generation security incident and beam body are damaged.The present invention is safe and reliable, easy construction, and the making of sandbox is simple,
Put and to draw materials conveniently with the former material such as husky, low cost, there is preferable economic benefit.
Accompanying drawing explanation
Fig. 1 is that a structural representation is put in the stretch-draw of the present invention；
Fig. 2 is the structural representation putting a sandbox that the present invention uses.
Detailed description of the invention
Fig. 1 show pre-tensioned concrete hollow plate steel strand tension of the present invention and puts a structural representation.
It is the structural representation putting a sandbox that uses of the present invention shown in Fig. 2, puts a sandbox 10 and include steel bushing 11 and live
Plug 12, piston 12 can reciprocatingly slide in steel bushing 11.Steel bushing 11 top is provided with sand inlet 13 and sand inlet valve 14, steel bushing
It is provided with sand outlet 15 and sand outlet valve 16 bottom cylinder 11.
The present invention uses said structure carry out stretch-draw and put and specifically include following steps:
(1) set portable anchorage beam 2, one end of anchoring prestress steel strand wires 3 in precast pedestal 1 one end, and moving
Arrange between formula anchorage beam 2 and precast pedestal 1 and put a sandbox 10, described in put to be full of in a sandbox 10 and put a sand 17；Put a sandbox
Including steel bushing and the piston that reciprocatingly slides along steel bushing inwall, steel bushing 11 one end putting a sandbox 10 acts against precast pedestal
On 1, piston 12 one end putting a sandbox acts against on portable anchorage beam 2；
(2)) set stretch-drawing beam 4 at precast pedestal 1 other end, inside stretch-drawing beam 4, set crossbeam 5 in tension frame, answer with pre-
Power steel strand wires 3 other end anchors, and sets the outer crossbeam 6 of tension frame outside stretch-drawing beam 4, crossbeam 5 crossbeam outer with tension frame in tension frame
Connecting by running through the screw rod 7 of stretch-drawing beam 4 between 6, screw rod 7 sets nut between the outer crossbeam of stretch-drawing beam and tension frame one section
8, between the outer crossbeam 6 of stretch-drawing beam 4 and tension frame, set stretch-draw jack 9；
(3) during stretch-draw, handling the outer crossbeam 6 of jack 9 pushing tow tension frame and move laterally, in driving tension frame, crossbeam 5 moves
Dynamic, it is achieved to steel strand wires 3 stretch-draw；Steel strand wires 3 drive portable anchorage beam 2 to move to precast pedestal 1 direction simultaneously, make to put and open
Sandbox 10 stress is extruded；Steel strand wires 3 stretch-draw to after predetermined value, stops jack 9 pushing tow, and by the nut 8 on screw rod 7 to
Draw crossbeam 4 to tighten, make steel strand wires position；
(4), when putting, put a sand 17 in a sandbox 10 will be put and uniformly release, put the piston 12 of a sandbox 10 to steel bushing 11
Contract, makes to put the extruding force suffered by a sandbox and is unloaded, and puts so that realizing steel strand wires.
When the present invention is embodied as, the material putting the piston of a sandbox and steel bushing uses seamless steel pipe to make, piston and
The spacing of steel bushing barrel is 0.5mm, and rubbing surface to carry out bright and clean process, the effective travel distance at least 180mm of sandbox piston,
Meet the loose requirement of steel strand wires.Sand inlet diameter is set to 250mm, and sand outlet diameter is set to 16mm.
Before tension steel strand, sandbox piston is pulled out 180-200mm, by sand inlet, steel bushing filled sand and smash
Real, sand inlet valve is tightened.
Putting and put Zhang Sha used by a sandbox, its fineness is the sand by No. 50 and No. 30 standard screens, makes by the grating of 6:4
With, the most both can guarantee that putting Zhang Sha is difficult to crush and causes the phenomenon that can not flow, and can reduce again the voidage putting Zhang Sha, thus reduce
The compressed value of Zhang Sha is put during use.
Claims (5)
1. a pre-tensioned concrete hollow plate steel strand tension and put Zhang Fangfa, it is characterised in that:
(1) portable anchorage beam is set in precast pedestal one end, one end of anchoring prestress steel strand wires, and at movable type anchoring horizontal stroke
Arrange between beam and precast pedestal and put a sandbox, described in put to be full of in a sandbox and put Zhang Sha；Put a sandbox and include steel bushing and along steel
The piston that sleeve lining reciprocatingly slides, the steel bushing one end putting a sandbox acts against on precast pedestal, puts the piston one of a sandbox
End acts against on portable anchorage beam；
(2) set stretch-drawing beam at the precast pedestal other end, inside stretch-drawing beam, set crossbeam in tension frame, another with prestress wire
One end anchors, and sets the outer crossbeam of tension frame outside stretch-drawing beam, by running through stretch-draw between crossbeam and the outer crossbeam of tension frame in tension frame
The screw rod of crossbeam connects, and screw rod sets nut, at stretch-drawing beam and pulling force between the outer crossbeam of stretch-drawing beam and tension frame one section
Stretch-draw jack is set between the outer crossbeam of frame；
(3), during stretch-draw, handle the outer crossbeam of jack pushing tow tension frame and move laterally, drive cross beam movement in tension frame, to steel
Twisted wire stretch-draw；Steel strand wires drive portable anchorage beam to move to precast pedestal direction simultaneously, make to put a sandbox stress and are extruded；
Steel strand tension, to after predetermined value, stops jack pushing tow, and is tightened to stretch-drawing beam by the nut on screw rod, makes steel strand wires fixed
Position；
(4) when putting, husky in a sandbox will be put uniformly release, put the piston of a sandbox to steel bushing contract, make to put a sandbox
Suffered extruding force is unloaded, and puts so that realizing steel strand wires.
Pre-tensioned concrete hollow plate steel strand tension the most according to claim 1 and put Zhang Fangfa, it is characterised in that: described
The steel bushing top putting a sandbox is provided with sand inlet and sand inlet valve, and bottom is provided with sand outlet and sand outlet valve.
Pre-tensioned concrete hollow plate steel strand tension the most according to claim 2 and put Zhang Fangfa, it is characterised in that: described
The a diameter of 250mm of sand inlet, a diameter of 16mm of sand outlet.
Pre-tensioned concrete hollow plate steel strand tension the most according to claim 1 and put Zhang Fangfa, it is characterised in that: described
The spacing putting a sandbox piston and steel bushing inwall is 0.5mm, the effective travel distance at least 180mm of sandbox piston.
Pre-tensioned concrete hollow plate steel strand tension the most according to claim 1 and put Zhang Fangfa, it is characterised in that: described
Putting and put Zhang Sha in a sandbox, its fineness is the sand by No. 50 and No. 30 standard screens, uses by the grating of 6:4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610391392.8A CN106049282A (en) | 2016-06-05 | 2016-06-05 | Method for tensioning and releasing hollow slab steel strands prefabricated through pre-tensioning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610391392.8A CN106049282A (en) | 2016-06-05 | 2016-06-05 | Method for tensioning and releasing hollow slab steel strands prefabricated through pre-tensioning method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106049282A true CN106049282A (en) | 2016-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610391392.8A Pending CN106049282A (en) | 2016-06-05 | 2016-06-05 | Method for tensioning and releasing hollow slab steel strands prefabricated through pre-tensioning method |
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| CN (1) | CN106049282A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108660907A (en) * | 2018-06-14 | 2018-10-16 | 中铁贵州旅游文化发展有限公司 | A kind of super open of stay cable force puts a structure |
| CN113215988A (en) * | 2021-01-20 | 2021-08-06 | 邓莉红 | Prestressed steel strand anchoring process for bridge construction |
| CN115816642A (en) * | 2022-11-21 | 2023-03-21 | 内蒙古交科路桥建设有限公司 | Sheet placing device |
Citations (4)
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|---|---|---|---|---|
| CN2388267Y (en) * | 1999-10-08 | 2000-07-19 | 许国才 | Pretensioning prestressed reinforcement releasing device |
| CN2823436Y (en) * | 2005-09-09 | 2006-10-04 | 中国海洋石油总公司 | Pretensioning method prestressed tensioned bed device |
| CN201239993Y (en) * | 2008-05-29 | 2009-05-20 | 山东省公路建设（集团）有限公司 | Integral tension and relaxation system for pre-tensioned prestressing tension process |
| KR101336518B1 (en) * | 2012-10-09 | 2013-12-03 | 김삼순 | Pre-tensioning method for manufacturing prestressed concrete products |
-
2016
- 2016-06-05 CN CN201610391392.8A patent/CN106049282A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2388267Y (en) * | 1999-10-08 | 2000-07-19 | 许国才 | Pretensioning prestressed reinforcement releasing device |
| CN2823436Y (en) * | 2005-09-09 | 2006-10-04 | 中国海洋石油总公司 | Pretensioning method prestressed tensioned bed device |
| CN201239993Y (en) * | 2008-05-29 | 2009-05-20 | 山东省公路建设（集团）有限公司 | Integral tension and relaxation system for pre-tensioned prestressing tension process |
| KR101336518B1 (en) * | 2012-10-09 | 2013-12-03 | 김삼순 | Pre-tensioning method for manufacturing prestressed concrete products |
Non-Patent Citations (2)
| Title |
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| 孙奎增: "浅谈先张法预应力空心板的施工技术与质量控制", 《东北公路》 * |
| 孙忠文等: "砂箱放张在先张法预应力空心板施工中的应用", 《东北公路》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108660907A (en) * | 2018-06-14 | 2018-10-16 | 中铁贵州旅游文化发展有限公司 | A kind of super open of stay cable force puts a structure |
| CN108660907B (en) * | 2018-06-14 | 2024-02-23 | 中铁贵州旅游文化发展有限公司 | Stay cable force overstretching structure |
| CN113215988A (en) * | 2021-01-20 | 2021-08-06 | 邓莉红 | Prestressed steel strand anchoring process for bridge construction |
| CN113215988B (en) * | 2021-01-20 | 2022-09-09 | 安徽通利预应力科技有限公司 | Prestressed steel strand anchoring process for bridge construction |
| CN115816642A (en) * | 2022-11-21 | 2023-03-21 | 内蒙古交科路桥建设有限公司 | Sheet placing device |
| CN115816642B (en) * | 2022-11-21 | 2024-01-02 | 内蒙古交科路桥建设有限公司 | Put and open device |
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Application publication date: 20161026 |
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