CN109024278A - A kind of low retracting secondary stretch-draw anchorage - Google Patents
A kind of low retracting secondary stretch-draw anchorage Download PDFInfo
- Publication number
- CN109024278A CN109024278A CN201810928159.8A CN201810928159A CN109024278A CN 109024278 A CN109024278 A CN 109024278A CN 201810928159 A CN201810928159 A CN 201810928159A CN 109024278 A CN109024278 A CN 109024278A
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- China
- Prior art keywords
- pressure
- bearing nut
- force
- anchor
- force ring
- 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 abstract description 29
- 239000010959 steel Substances 0.000 abstract description 29
- 230000003014 reinforcing effect Effects 0.000 abstract description 8
- 238000003780 insertion Methods 0.000 abstract description 4
- 230000037431 insertion Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 238000011084 recovery Methods 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 238000005096 rolling process Methods 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
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a kind of low retracting secondary stretch-draw anchorages, comprising: cylindrical anchor slab offers multiple anchor holes on anchor slab；Pressure-bearing nut, pressure-bearing nut are sheathed on anchor slab, are connected between pressure-bearing nut and anchor slab by being threadedly engaged；Exert a force ring, and force ring set is set to pressure-bearing nut, and the outer surface for the ring that exerts a force is circumferentially spaced to apply stubborn slot equipped with multiple, and force ring can be rotated in the case where applying the rotary force that stubborn slot applies, to drive pressure-bearing nut to anchor plate precession and push against onto anchor plate.Stubborn slot is applied using reinforcing bar or round steel as spanner insertion, make the ring rotation that exerts a force, to drive pressure-bearing nut to anchor plate precession and push against onto anchor plate, anchorage is locked, break adrift is completed, it applies stubborn slot to be provided on force ring, can be more convenient to apply stubborn pressure-bearing nut on the basis of not destroying the integrality of pressure-bearing nut.
Description
Technical field
The present invention relates to prestressed anchor fields, and in particular to a kind of low retracting secondary stretch-draw anchorage.
Background technique
Currently, science of bridge building vertical prestressing uses low retracting secondary stretch-draw anchorage, because anchorage on beam top but is not permitted
Permitted to be higher by bridge floor, low retracting secondary stretch-draw anchorage must be arranged below in the groove of bridge floor.Low retraction anchorage be it is a kind of relatively
New prestressed anchor generallys use tension construction technology twice: twisting for the first time according to conventional prestressed concrete techniqres tensioning steel
Line makes the intermediate plate in anchor slab clamp prestress wire, and the amount of recovery of steel strand wires is generally 6mm at this time；Second of tensioning anchor slab,
After the design stretching force for reaching steel strand wires, the nut outside anchor slab need to be screwed down to nut contact anchor plate, eliminate anchor slab with
Gap between anchor plate loses the retraction of prestressed stretch-draw and reaches minimum, can control the amount of recovery of steel strand wires to 1mm,
To realize high-precision tensioning, it is a kind of anchorage for being suitable for middle short length prestressed strand, can be used for substituting traditional use
Finish rolling deformed bar.
Existing low retracting secondary stretch-draw anchorage is right since pressure-bearing nut is in groove in second of stretching process
Pressure-bearing nut outside anchor slab is screwed to be limited by space, brings inconvenience to construction.It it may also be desirable to simultaneously biggish pre-
The reinforcing bar for staying size and concrete structure to reserve is collided, and reduces two times tensioning effect, and be possible to the concrete knot that destroys a bridge
Structure.The patent of Publication No. CN204475185U discloses a kind of low retraction anchorage, which uses in original pressure-bearing nut
Upper fluting or drilling, to facilitate screw on nut, but this mode can generate following problems: (1) pressure-bearing nut is to participate in prestressing force
The permanent component of anchoring slots or is drilled on pressure-bearing nut, destroys its integrality, affect its stress, reduces
Safety in utilization；(2) bridge prestress system construction work amount is big, such as use this anchorage, will increase factory process difficulty and at
This.
Summary of the invention
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of low retracting secondary stretch-draw anchorage,
It can be more convenient to apply stubborn pressure-bearing nut on the basis of not destroying the integrality of pressure-bearing nut.
To achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of low retracting secondary stretch-draw anchorage, comprising:
Cylindrical anchor slab offers multiple anchor holes on the anchor slab；
Pressure-bearing nut, the pressure-bearing nut are sheathed on the anchor slab, pass through spiral shell between the pressure-bearing nut and the anchor slab
Line cooperation is connected；
Exert a force ring, and the force ring set is set to the pressure-bearing nut, and the outer surface of the force ring is circumferentially spaced to be equipped with
Multiple to apply stubborn slot, the force ring can rotate under the rotary force for applying stubborn slot application, to drive the pressure-bearing nut to anchor
Backing plate precession is simultaneously pushed against onto anchor plate.
Based on the above technical solution, the upper part of the pressure-bearing nut outer wall is in polygon, in the force ring
Wall is in be connected on the upper part of the pressure-bearing nut with the matched polygon of pressure-bearing nut, the force ring set.
Based on the above technical solution, the upper part of the pressure-bearing nut outer wall is in regular hexagon, the force ring
Inner wall be in and the matched regular hexagon of pressure-bearing nut.
Based on the above technical solution, the anchor hole includes bellmouth and square hole, and the bellmouth is close to described
The top of pressure-bearing nut, which is set up separately, sets；The square hole sets up separately close to the lower part of the pressure-bearing nut to be set, and described square hole one end
It is connected with the bellmouth, the other end is equipped with chamfering.
Based on the above technical solution, offered on the force ring it is multiple apply stubborn slot, it is multiple described to apply stubborn slot and be
Semicircle or rectangular blind slot.
Based on the above technical solution, offered on the force ring it is multiple apply stubborn slot, it is multiple described to apply stubborn slot and be
Semicircle or rectangular through slot.
Compared with the prior art, the advantages of the present invention are as follows:
(1) a kind of low retracting secondary stretch-draw anchorage of the invention is during two times tensioning, using reinforcing bar or round steel as
Stubborn slot is applied in spanner insertion, makes the ring rotation that exerts a force, to drive pressure-bearing nut to anchor plate precession and push against onto anchor plate, anchorage quilt
Locking, break adrift are completed, and are applied stubborn slot and are provided on force ring, can be more square on the basis of not destroying the integrality of pressure-bearing nut
Just stubborn pressure-bearing nut is applied.
It (2) is in partially polygonized structure on the outer wall of pressure-bearing nut of the invention, lower part is divided into circular configuration, circular configuration
Outer diameter be greater than polygonized structure where outer circle outer diameter, force ring inner wall be in and the matched polygonized structure of nut, exert a force ring
It is socketed on the upper part of nut, outer circle is outer where being greater than upper part polygonized structure due to the outer diameter of part under pressure-bearing nut
Diameter, force ring are not fallen out, and can easily rotate pressure-bearing nut by the rotation for the ring that exerts a force.
(3) a kind of low retracting secondary stretch-draw anchorage of the invention can block in anchor hole in the construction process sets intermediate plate, intermediate plate
It being clamped in square hole by bellmouth, steel strand wires can be passed through smoothly from intermediate plate very much when construction, when jack is put, steel
Twisted wire can bounce back downwards, and steel, which is twisted, at this time is gradually increased final locking steel strand wires by the transverse clamping force of intermediate plate, to prevent steel
The retraction of twisted wire.
Detailed description of the invention
Fig. 1 is a kind of main view of second of tension ground tackle of low retraction in the embodiment of the present invention；
Fig. 2 is a kind of top view of the present invention second of tension ground tackle of low retraction；
Fig. 3 is a kind of cross-sectional view of the present invention second of tension ground tackle of low retraction；
Fig. 4 is the structural schematic diagram of force ring in the embodiment of the present invention.
In figure: 1- anchor slab, 10- anchor hole, 100- bellmouth, 101- square hole, 102- chamfering, 2- pressure-bearing nut, 3- force
Ring, 30- apply stubborn slot.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.
Referring to shown in Fig. 1, Fig. 2 and Fig. 4, the embodiment of the present invention provides a kind of low retracting secondary stretch-draw anchorage, comprising: cylinder
The anchor slab 1 of shape offers multiple anchor holes 10 on anchor slab；Pressure-bearing nut 2, pressure-bearing nut 2 are sheathed on anchor slab 1, pressure-bearing nut 2 and anchor
It is connected by being threadedly engaged between plate 1；Exert a force ring 3, and force ring 3 is sheathed on pressure-bearing nut 2, and the outer surface for the ring 3 that exerts a force is circumferentially
Be equipped at intervals with it is multiple apply stubborn slot 30, force ring 3 can be rotated in the case where applying the rotary force that stubborn slot 30 applies, with drive pressure-bearing nut 2 to
Anchor plate precession is simultaneously pushed against onto anchor plate.
In the construction process, second of tension ground tackle of low retraction of the invention will match with preceding clamp type low expansion lifting jack
It closes and uses.Steel strand wires are threaded through in the anchor hole 10 of anchor slab 1, and second of tensioning is to lock pressure-bearing nut 2 to realize and reduce the
The excessive amount of recovery of prestress wire after single tension anchoring.Jack tension steel strand, steel under second of oil pressure cntrol
Twisted wire drives anchorage to be pulled together, and the amount of recovery of steel strand wires when elongation is first time tensioning occurs in jack, utilizes at this time
Reinforcing bar or round steel apply stubborn slot 30 as spanner insertion, and the ring 3 that makes to exert a force rotates, until pressure-bearing nut 2 is tightened, and rotating pressure-bearing nut
2 push against on anchor plate, and anchorage is locked, and break adrift is completed, can be more on the basis of not destroying the integrality of pressure-bearing nut 2
Conveniently apply stubborn pressure-bearing nut 2.Also, steel strand wires are first through steel in the preformed hole of bridge web, then by anchorage in construction
On twisted wire, the anchor slab 1 of anchorage is pushed against on the anchor plate of bridge web, by rotating force ring 3 for the pressure-bearing nut outside anchor slab 1
2 are threaded to from the 1mm of anchor slab bottom, then top-pressing jack is penetrated on steel strand wires, when second of stretching force reaches design stress
When value, anchorage is locked, after the completion of tensioning, unloads top-pressing jack, anchorage can be by steel strand anchoring on the web of bridge.
As shown in Figure 2 and Figure 4, as an optional embodiment, the upper part of 2 outer wall of pressure-bearing nut is in polygon, is applied
3 inner wall of power ring is in be socketed on the upper part of pressure-bearing nut 2 with the matched polygon of pressure-bearing nut 2, the ring 3 that exerts a force.Pressure-bearing nut 2
Outer wall on be partially in polygonized structure, lower part is divided into circular configuration, and the outer diameter of circular configuration is greater than polygonized structure institute outside
Round outer diameter, force 3 inner wall of ring are in be socketed on the upper part of nut with the matched polygonized structure of nut, the ring 3 that exerts a force, due to
The outer diameter of outer circle, force ring 3 do not fall out, pass through where the outer diameter of the lower part of pressure-bearing nut 2 is greater than upper part polygonized structure
The rotation of force ring 3 can easily rotate pressure-bearing nut 2, and polygon can use hexagon, octagon, pentagon knot
Structure.
As a preferred embodiment, the upper part of 2 outer wall of pressure-bearing nut is in regular hexagon, force 3 inner wall of ring be in
The matched regular hexagon of pressure-bearing nut 2.Regular hexagon structure is preferred structure, and regular hexagon structure is sufficiently stable, can guarantee
Force ring 3 is steadily set on pressure-bearing nut 2, and the nut of regular hexagon facilitates shop, is conducive to produce in batches.
As shown in figure 3, anchor hole 10 includes bellmouth 100 and square hole 101, bellmouth as a preferred embodiment
100 set up separately close to the top of pressure-bearing nut 2 and set；Square hole 101 sets up separately close to the lower part of pressure-bearing nut 2 to be set, and square hole 101 1
End is connected with bellmouth 100, and the other end is equipped with chamfering 102.In the construction process, intermediate plate is arranged in anchor hole 10, intermediate plate is logical
It crosses bellmouth 100 to be clamped in square hole 101, steel strand wires can be passed through smoothly from intermediate plate very much when construction, when jack is put
When, steel strand wires can bounce back downwards, and steel strand 7 is gradually increased final locking steel strand wires by the transverse clamping force of intermediate plate at this time, thus
Prevent the retraction of steel strand wires.
As shown in Figure 1, as a preferred embodiment, offered on the ring 3 that exerts a force it is multiple apply stubborn slot 30, it is multiple to apply stubborn slot
30 be semicircle or rectangular blind slot.Stubborn slot 30 of applying in the embodiment of the present invention is 12, and reinforcing bar or round steel are inserted into blind slot,
Make the rotation of ring 3 that exerts a force by tapping reinforcing bar or round steel, to drive pressure-bearing nut 2 to anchor plate precession and push against onto anchor plate.
As shown in figure 4, as a preferred embodiment, offered on the ring 3 that exerts a force it is multiple apply stubborn slot 30, it is multiple to apply stubborn slot
30 be semicircle or rectangular through slot.By in reinforcing bar or round steel inclination insertion through slot, make the ring 3 that exerts a force by tapping reinforcing bar or round steel
Rotation, to drive pressure-bearing nut 2 to anchor plate precession and push against onto anchor plate.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (6)
1. a kind of low retracting secondary stretch-draw anchorage characterized by comprising
Cylindrical anchor slab (1) offers multiple anchor holes (10) on the anchor slab (1)；
Pressure-bearing nut (2), the pressure-bearing nut (2) are sheathed on the anchor slab (1), the pressure-bearing nut (2) and the anchor slab (1)
Between it is connected by being threadedly engaged；
It exerts a force ring (3), the force ring (3) is sheathed on the pressure-bearing nut (2), and the outer surface of force ring (3) is circumferentially
Be equipped at intervals with it is multiple apply stubborn slot (30), it is described force ring (3) can it is described apply stubborn slot (30) application rotary force under rotate, with band
The pressure-bearing nut (2) is moved to anchor plate precession and is pushed against onto anchor plate.
2. low retracting secondary stretch-draw anchorage as described in claim 1, it is characterised in that: pressure-bearing nut (2) outer wall it is upper
Part is in polygon, and force ring (3) inner wall is in and the matched polygon of the pressure-bearing nut (2), force ring (3) set
It is connected on the upper part of the pressure-bearing nut (2).
3. low retracting secondary stretch-draw anchorage as claimed in claim 2, it is characterised in that: pressure-bearing nut (2) outer wall it is upper
Part is in regular hexagon, and force ring (3) inner wall is in and the matched regular hexagon of the pressure-bearing nut (2).
4. low retracting secondary stretch-draw anchorage as claimed in claim 3, it is characterised in that: the anchor hole (10) includes bellmouth
(100) and square hole (101), the bellmouth (100) is set up separately close to the top of the pressure-bearing nut (2) and is set；The square hole
(101) set up separately close to the lower part of the pressure-bearing nut (2) and set, and the square hole (101) one end and the bellmouth (100) phase
Connection, the other end are equipped with chamfering (102).
5. low retracting secondary stretch-draw anchorage as described in claim 1, it is characterised in that: offered on the force ring (3) more
A to apply stubborn slot (30), semicircle or rectangular blind slot is in multiple described apply stubborn slot (30).
6. low retracting secondary stretch-draw anchorage as described in claim 1, it is characterised in that: offered on the force ring (3) more
A to apply stubborn slot (30), semicircle or rectangular through slot is in multiple described apply stubborn slot (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810928159.8A CN109024278A (en) | 2018-08-14 | 2018-08-14 | A kind of low retracting secondary stretch-draw anchorage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810928159.8A CN109024278A (en) | 2018-08-14 | 2018-08-14 | A kind of low retracting secondary stretch-draw anchorage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109024278A true CN109024278A (en) | 2018-12-18 |
Family
ID=64630419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810928159.8A Pending CN109024278A (en) | 2018-08-14 | 2018-08-14 | A kind of low retracting secondary stretch-draw anchorage |
Country Status (1)
| Country | Link |
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| CN (1) | CN109024278A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070102385A (en) * | 2007-02-08 | 2007-10-18 | 김현래 | Casket anchor |
| CN201217778Y (en) * | 2008-07-07 | 2009-04-08 | 万国强 | Low-retraction secondary stretching pre-stress anchorage |
| CN102268857A (en) * | 2011-06-18 | 2011-12-07 | 湘潭欧之姆预应力锚具有限公司 | Low-retracting secondary stretch-draw anchorage supporting nut screwing device |
| CN203023217U (en) * | 2012-11-29 | 2013-06-26 | 厦门建霖工业有限公司 | Torque limited nut structure |
| CN208803374U (en) * | 2018-08-14 | 2019-04-30 | 中铁大桥局集团有限公司 | A kind of low retracting secondary stretch-draw anchorage |
-
2018
- 2018-08-14 CN CN201810928159.8A patent/CN109024278A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070102385A (en) * | 2007-02-08 | 2007-10-18 | 김현래 | Casket anchor |
| CN201217778Y (en) * | 2008-07-07 | 2009-04-08 | 万国强 | Low-retraction secondary stretching pre-stress anchorage |
| CN102268857A (en) * | 2011-06-18 | 2011-12-07 | 湘潭欧之姆预应力锚具有限公司 | Low-retracting secondary stretch-draw anchorage supporting nut screwing device |
| CN203023217U (en) * | 2012-11-29 | 2013-06-26 | 厦门建霖工业有限公司 | Torque limited nut structure |
| CN208803374U (en) * | 2018-08-14 | 2019-04-30 | 中铁大桥局集团有限公司 | A kind of low retracting secondary stretch-draw anchorage |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181218 |