CN108360388A - A kind of steel strand wires pre-tighten tensioning equipment and technique - Google Patents
A kind of steel strand wires pre-tighten tensioning equipment and technique Download PDFInfo
- Publication number
- CN108360388A CN108360388A CN201810319914.2A CN201810319914A CN108360388A CN 108360388 A CN108360388 A CN 108360388A CN 201810319914 A CN201810319914 A CN 201810319914A CN 108360388 A CN108360388 A CN 108360388A
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- China
- Prior art keywords
- hole
- sheath
- steel strand
- strand wires
- jack
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 58
- 239000010959 steel Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000003032 molecular docking Methods 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 230000036316 preload Effects 0.000 claims description 5
- 239000004677 Nylon Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 240000002853 Nelumbo nucifera Species 0.000 claims description 3
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 3
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 229920006334 epoxy coating Polymers 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention relates to a kind of steel strand wires to pre-tighten tensioning equipment and technique, tensioning equipment includes single hole tool anchor slab (1), centre-hole jack (4) and tool clamping piece (5), single hole tool anchor slab (1) is removably attachable to the end of centre-hole jack (4), the tool clamping piece (5) is placed outside centre-hole jack, the anchor hole of the single hole tool anchor slab (1) is aligned with the center hole of centre-hole jack piston (3), the end of the centre-hole jack is additionally provided with sheath (2), one end docking anchor hole other end docking center hole of the sheath (2) constitutes the front and back channel of reeving penetrated through.The application is external by the tool clamping piece for being built in jack, and in the sheath for connecting anchor hole and piston center hole built in jack, sheath ensures that steel strand wires walking in jack is smoothed out with smooth taper hole, the epoxy coating of steel strand surface will not be scratched when reeving.
Description
Technical field
The present invention relates to the tensioning equipments of steel strand wires, and in particular to a kind of pre- applied to reeving for steel strand wires external prestressing
Nervous drawing device.
Background technology
External prestressing system is one of the important branch of post-tensioned prestressing structure system.With Prestressed Concrete Bridges
The development of actual techniques, external prestressing technique are more and more applied.
In conventional external tendon work progress, it is usually used and is initially switched off steel strand wires and reeves, pre-tighten again the construction party of tensioning
Formula, the sag influence caused by steel strand wires are conducted oneself with dignity cause steel strand wires waste.If can first pre-tighten tensioning after reeving steel strands
It cuts off again, then can effectively avoid waste of material.
But the tool clamping piece currently used for locking steel strand wires is built in jack, this can influence steel strand wires
It walks, and the metal sharp edge and tool clamping piece of jack all easily scratch the epoxy coating of steel strand wires.
Invention content
The technical problem to be solved by the present invention is to provide a kind of steel strand wires preload tensioning equipment for the above-mentioned prior art,
Reduce steel strand wires and walk difficulty in jack, and the epoxy coating of steel strand wires is constituted and is protected.
Technical solution is used by the present invention solves the above problems：A kind of steel strand wires preload tensioning equipment, single hole tool
Anchor slab, centre-hole jack and tool clamping piece, the single hole tool anchor slab are removably attachable to the end of centre-hole jack,
The tool clamping piece is placed outside centre-hole jack, the punching of the anchor hole and centre-hole jack piston of the single hole tool anchor slab
Hole is aligned, and the end of the centre-hole jack is additionally provided with hollow sheath, one end docking anchor hole other end docking of the sheath
Center hole constitutes the front and back channel of reeving penetrated through.
Particularly, one end of the sheath is mounted to the straight hole section of anchor hole, piston it is close with respect to the other end of sheath or
It is separate：Another end in contact of the end face of piston and sheath during steel strand wires are walked, piston is far from sheath in stretching process
The other end.
Relatively rational setting is that the bellmouth of the tool clamping piece and anchor hole matches, after pre-tightening tensioning, by tool holder
The interval of piece merging bellmouth and steel strand wires is external by tool clamping piece to lock steel strand wires, and is placed in anchor slab after pre-tightening tensioning
Taper hole in, can reduce resistance of reeving compared to built-in tool clamping piece, avoid the epoxy coating of cost-effective steel strand surface.
Preferably, the sheath is the hollow tube of nylon material, be ensure that together with the taper hole smooth with single hole tool anchor slab
The epoxy coating of steel strand wires will not be scratched.
Preferably, the anchor hole is followed successively by the first taper hole, straight hole, the second taper hole, the first taper hole and work according to direction of reeving
Tool intermediate plate matches, and straight hole is conducive to reeve for docking the sheath, the second taper hole, reduces the rubbing surface of anchor hole and steel strand wires
Product.
The single hole tool anchor slab and centre-hole jack are detachably connected by the realization of matched internal and external threads, side
Just it dismounts.
The application will influence the built-in tool clamping piece taking-up that steel strand wires are walked in jack spare；Single hole tool anchor slab with
Jack end is connected by internal and external threads, and installation tool intermediate plate, steel strand wires do not pre-tighten tensioning and afterwards will in place when installing steel strand wires
In the anchor hole gap of tool clamping piece etc. point installation single hole tool anchor slab and strike tight.
The steel strand wires that tensioning equipment is pre-tightened according to the tensioning of the application design pre-tighten tensioning process：Single hole tool anchor slab is consolidated
Surely centre-hole jack end is arrived, it is ensured that tool clamping piece is external, and centre-hole jack connects oil pump, in unloaded situation before tensioning
Several strokes of lower piston activity, piston, which is retracted into its end face and is contacted with the end face of sheath, allows sheath to be docked with center hole, then opens
Beginning reeves, and steel strand wires pass through anchor hole by sheath subsequently into the center hole of piston, channel smooth of entirely reeving；It reeves knot
Start oil pump after beam, piston action is slowly pulled out far from sheath, by steel strand wires, and oil is first held after reaching the tension tonnage of design
Pressure, after holding lotus, the taper anchor hole internal locking steel that tool clamping piece is knocked in steel strand wires and single hole tool anchor slab from outside twists
Line.
During reeving, hollow sheath constitutes the channel of reeving of successively perforation with anchor hole, center hole.
Compared with the prior art, the advantages of the present invention are as follows：It can effectively ensure that epoxy coating strand smoothly in jack
It inside walks, channel smooth of reeving will not scratch the epoxy coating of steel strand wires.This feature has driven steel strand wires external prestressing
Process modification of reeving, realize steel strand wires and first pre-tighten tensioning and cut off again, can effectively avoid the waste of steel strand wires material.
Description of the drawings
Fig. 1 is that schematic diagram of the tensioning equipment when reeving is pre-tightened in the embodiment of the present invention；
Fig. 2 is that schematic diagram of the tensioning equipment in tensioning is pre-tightened in the embodiment of the present invention.
1 single hole tool anchor slab, 2 sheaths, 3 pistons, 4 centre-hole jacks, 5 tool clamping pieces
Specific implementation mode
Below in conjunction with attached drawing embodiment, present invention is further described in detail.
It includes single hole tool anchor slab 1, centre-hole jack 4 and tool holder that steel strand wires in the present embodiment, which pre-tighten tensioning equipment,
Piece 5, single hole tool anchor slab 1 are detachable by internal thread and the external screw thread of centre-hole jack end 4.Tool clamping piece 5 is placed outside
The anchor hole of centre-hole jack, single hole tool anchor slab 1 is aligned with the center hole of centre-hole jack piston 3, centre-hole jack
End be additionally provided with nylon material, hollow sheath 2, before one end docking anchor hole other end docking center hole of sheath 2 is constituted
The channel of reeving penetrated through afterwards.
Anchor hole is followed successively by the first taper hole, straight hole, the second taper hole, the first taper hole and tool clamping piece phase according to direction of reeving
Match, one end of sheath 2 is mounted to straight hole section, piston 3 with respect to sheath the other end close to or away from：During reeving steel strands
The end face of piston 3 and another end in contact of sheath 2, the other end of the piston far from sheath in stretching process, as shown in Figure 2.
When operation, single hole tool anchor slab 1 is fixed to 4 end of centre-hole jack, it is ensured that tool clamping piece 5 is external, punching
Formula jack connects oil pump, and 3 several strokes of activity of piston, piston 3 are retracted into its end face and shield in the case of zero load before tensioning
Set 2 end face contact allows sheath dock with center hole, then start to reeve, steel strand wires across anchor hole pass through sheath 2 subsequently into
The center hole of piston 3, channel smooth of entirely reeving；Start oil pump after reeving, piston action twists steel far from sheath
Line slowly pulls out, and oil pressure is first held after reaching the tension tonnage of design, after holding lotus, after pre-tightening tensioning, by three-clove style
Tool clamping piece 5 is placed in the interval of the first bellmouth and steel strand wires and strikes tightly to lock steel strand wires.
Above-mentioned centre-hole jack 4 is common centre-hole jack, and the application will be built in the tool clamping piece of jack
External, in the sheath for connecting anchor hole and piston center hole built in jack, sheath ensures steel strand wires very heavy with smooth taper hole
Walking in top is smoothed out, and reeves while will not scratch the epoxy coating of steel strand surface.
In addition to the implementation, all to use equivalent transformation or equivalent replacement the invention also includes there is an other embodiment
The technical solution that mode is formed should all be fallen within the scope of the hereto appended claims.
Claims (10)
1. a kind of steel strand wires pre-tighten tensioning equipment, including single hole tool anchor slab (1), centre-hole jack (4) and tool clamping piece
(5), it is characterised in that：The single hole tool anchor slab (1) is removably attachable to the end of centre-hole jack (4), the work
Tool intermediate plate (5) is placed outside centre-hole jack, anchor hole and the centre-hole jack piston (3) of the single hole tool anchor slab (1)
Center hole is aligned, and the end of the centre-hole jack is additionally provided with hollow sheath (2), and anchor hole is docked in one end of the sheath (2)
The other end docks center hole and constitutes the front and back channel of reeving penetrated through.
2. steel strand wires according to claim 1 pre-tighten tensioning equipment, it is characterised in that：It inlays one end of the sheath (2)
To the straight hole section of anchor hole, piston (3) with respect to sheath (2) the other end close to or away from：Piston (3) during reeving steel strands
End face and sheath another end in contact, the other end of the piston far from sheath in stretching process.
3. steel strand wires according to claim 1 or 2 pre-tighten tensioning equipment, it is characterised in that：The tool clamping piece and anchor hole
Bellmouth match, after pre-tightening tensioning, tool clamping piece is placed in the interval of bellmouth and steel strand wires to lock steel strand wires.
4. steel strand wires according to claim 1 pre-tighten tensioning equipment, it is characterised in that：The sheath (2) is nylon material
Hollow tube.
5. steel strand wires according to claim 1 pre-tighten tensioning equipment, it is characterised in that：The anchor hole according to reeve direction according to
Secondary is the first taper hole, straight hole, the second taper hole, and the first taper hole matches with tool clamping piece, and straight hole is for docking the sheath.
6. steel strand wires according to claim 1 pre-tighten tensioning equipment, it is characterised in that：The single hole tool anchor slab (1) and
Centre-hole jack (4) is detachably connected by the realization of matched internal and external threads.
7. a kind of steel strand wires based on claim 1 described device pre-tighten tensioning process, it is characterised in that：By single hole tool anchor slab
Fixed to centre-hole jack end, it is ensured that tool clamping piece is external, and centre-hole jack connects oil pump, in unloaded feelings before tensioning
Several strokes of condition lower piston activity, piston, which is retracted into its end face and is contacted with the end face of sheath, allows sheath to be docked with center hole, then
Start to reeve, steel strand wires pass through anchor hole by sheath subsequently into the center hole of piston, channel smooth of entirely reeving；It reeves
After start oil pump, piston action is slowly pulled out far from sheath, by steel strand wires, and oil is first held after reaching the tension tonnage of design
Pressure, after holding lotus, the taper anchor hole internal locking steel that tool clamping piece is knocked in steel strand wires and single hole tool anchor slab from outside twists
Line.
8. preload tensioning process according to claim 7, it is characterised in that：The sheath is the hollow tube of nylon material,
During reeving, the channel of reeving of successively perforation is constituted with anchor hole, center hole.
9. preload tensioning process according to claim 7, it is characterised in that：The anchor hole is followed successively by according to direction of reeving
One taper hole, straight hole, the second taper hole, the first taper hole match with tool clamping piece, and straight hole is for docking the sheath.
10. preload tensioning process according to claim 7, it is characterised in that：The single hole tool anchor slab and punching thousand
Jin top is detachably connected by the realization of matched internal and external threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810319914.2A CN108360388A (en) | 2018-04-11 | 2018-04-11 | A kind of steel strand wires pre-tighten tensioning equipment and technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810319914.2A CN108360388A (en) | 2018-04-11 | 2018-04-11 | A kind of steel strand wires pre-tighten tensioning equipment and technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108360388A true CN108360388A (en) | 2018-08-03 |
Family
ID=63008186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810319914.2A Pending CN108360388A (en) | 2018-04-11 | 2018-04-11 | A kind of steel strand wires pre-tighten tensioning equipment and technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108360388A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374149A (en) * | 2019-08-26 | 2019-10-25 | 关喜才 | A kind of anti-floating pile vertical load detection method and disk knot detection device |
| CN110374150A (en) * | 2019-08-26 | 2019-10-25 | 关喜才 | A kind of anti-floating pile vertical load experiment detection method and device equipped with pre-tightening apparatus |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0270821A (en) * | 1988-07-26 | 1990-03-09 | Sanwa Doshitsu Kiso Kk | Anchor tension member |
| CN2825586Y (en) * | 2005-09-19 | 2006-10-11 | 江阴法尔胜住电新材料有限公司 | Inner-clamping type single-hole top-pressing jack |
| CN203065973U (en) * | 2013-02-19 | 2013-07-17 | 中交二公局第三工程有限公司 | Stretch-draw device for monofilament epoxy coating steel strands |
| CN106245849A (en) * | 2016-08-31 | 2016-12-21 | 襄阳中铁宏吉工程技术有限公司 | A kind of anchor and steel strand prestress tensioning system automatically |
| CN208379440U (en) * | 2018-04-11 | 2019-01-15 | 江苏法尔胜缆索有限公司 | A kind of steel strand wires preload tensioning equipment |
-
2018
- 2018-04-11 CN CN201810319914.2A patent/CN108360388A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0270821A (en) * | 1988-07-26 | 1990-03-09 | Sanwa Doshitsu Kiso Kk | Anchor tension member |
| CN2825586Y (en) * | 2005-09-19 | 2006-10-11 | 江阴法尔胜住电新材料有限公司 | Inner-clamping type single-hole top-pressing jack |
| CN203065973U (en) * | 2013-02-19 | 2013-07-17 | 中交二公局第三工程有限公司 | Stretch-draw device for monofilament epoxy coating steel strands |
| CN106245849A (en) * | 2016-08-31 | 2016-12-21 | 襄阳中铁宏吉工程技术有限公司 | A kind of anchor and steel strand prestress tensioning system automatically |
| CN208379440U (en) * | 2018-04-11 | 2019-01-15 | 江苏法尔胜缆索有限公司 | A kind of steel strand wires preload tensioning equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374149A (en) * | 2019-08-26 | 2019-10-25 | 关喜才 | A kind of anti-floating pile vertical load detection method and disk knot detection device |
| CN110374150A (en) * | 2019-08-26 | 2019-10-25 | 关喜才 | A kind of anti-floating pile vertical load experiment detection method and device equipped with pre-tightening apparatus |
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