CN202705897U - High strength low retracting anchorage device - Google Patents
High strength low retracting anchorage device Download PDFInfo
- Publication number
- CN202705897U CN202705897U CN 201220325338 CN201220325338U CN202705897U CN 202705897 U CN202705897 U CN 202705897U CN 201220325338 CN201220325338 CN 201220325338 CN 201220325338 U CN201220325338 U CN 201220325338U CN 202705897 U CN202705897 U CN 202705897U
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- supporting body
- high strength
- backing plate
- anchorage device
- ground tackle
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Abstract
The utility model discloses a high strength low retracting anchorage device. The high strength low retracting anchorage device comprises a high strength clamping body, an inner supporting body, an outer supporting body, a supporting body backing plate, a spiral rib, a pre-stressed steel strand and a corrugated pipe. The high strength low retracting anchorage device is characterized in that one end of the corrugated pipe is matched with the supporting body backing plate, the entire corrugated pipe is fixed and locked through the spiral rib, the pre-stressed steel strand penetrates through a channel formed by the corrugated pipe and the supporting body backing plate, one end of the pre-stressed steel strand, which is located on the supporting body backing plate, is provided with the inner supporting body, the outer supporting body and the high strength clamping body, the inner supporting body is in a screw thread fit with the outer supporting body, the high strength clamping body is in a two-piece structure, and two pieces of the high strength clamping body are combined to be matched with a taper hole of the inner supporting body. The high strength low retracting anchorage device has the advantages that the structural design is reasonable, the strength can reach to 1860Mpa, high strength requirements of bridge design can be met, the high strength low retracting anchorage device is used by matching an anchor ring with a nut, the retraction amount of the anchorage device is controlled within 1mm, and the anchorage performance of the anchorage device is greatly improved.
Description
Technical field
The utility model relates to a kind of ground tackle, relates in particular to the low retraction of a kind of high strength ground tackle.
Background technology
It is that φ 15.2mm high strength, underrelaxation steel strand are as presstressed reinforcing steel that nominal diameter is adopted in the at present vertical stretch-draw of large-span prestressed tie-beam of China more; Vertical prestressing mainly adopts the fining twisted steel anchoring system, and main specifications has 32 two kinds of φ 25 and φ, and ultimate load is respectively 530KN and 868.5KN.But there is following shortcoming in the fining twisted steel ground tackle: 1) in the pre-stress construction process, the fining twisted steel nut only relies on manually-operated to screw, bring uncertainty to anchoring, if misoperation, loss of prestress is very serious, and according to the test result of domestic relevant unit on some bridges, the prestressing force of most fining twisted steels is lower than designing requirement, have in addition be zero; 2) rigidity during indented bars during installation can not be fully vertical with anchor plate, can produce excessive anchorage deformation loss; 3) screw-thread steel low precision, intensity is low, and amount of recovery section is stable; 4) the screw-thread steel dimensional errors is large, and stable with the fit clearance section of ground tackle, the gap is little, and ground tackle can't be installed on the fining twisted steel, makes troubles to installation; The gap is large, and the risk that exists again ground tackle to come off brings impact for workman's safety.
The utility model content
The purpose of this utility model is in order to remedy the deficiency of prior art, the low retraction of a kind of high strength ground tackle is provided, its intensity can reach 1860Mpa, not only can reach the high strength requirement of bridge design, and be used in conjunction with by anchor ring and nut, the ground tackle amount of recovery is controlled in the 1mm, and the ground tackle anchoring property is greatly enhanced.
The utility model is achieved through the following technical solutions:
The low retraction of a kind of high strength ground tackle, include the high strength cramping body, interior supporting body, outer supporting body, the supporting body backing plate, spiral bar, prestress wire, bellows consists of, it is characterized in that: an end of described bellows cooperates with the supporting body backing plate, and whole by the spiral bar fixing and locking, described prestress wire passes bellows, the passage that the supporting body backing plate consists of, the end that described prestress wire is positioned at the supporting body backing plate is equipped with supporting body, outer supporting body, the high strength cramping body, adopt threaded engagement between described interior supporting body and the outer supporting body, described high strength cramping body adopts the two-piece type structure, cooperates with interior supporting body taper hole after its two combinations.
Be distributed with 8 taper holes of evenly arranging on the described interior supporting body, its cone angle is 6.5 °～7.5 °, and its cylindrical is provided with the external screw thread of M132.
One end of described outer supporting body is designed to the outer-hexagonal nut, and the jack that can match with it is used in conjunction with, and is provided with the internal thread of M132 in its endoporus.
The cone angle of described high strength cramping body cooperates with the cone angle of interior supporting body and is respectively 6.5 °～7.5 °, and tooth is apart from being 1.25, and angle of thread is 75 °～85 °, and the end of described high strength cramping body is equipped with jump ring.
Its know-why is: when making prestressed concrete member, the good reinforcing cage of colligation, arrange and reserve corrugated pipe pipeline and supporting body backing plate, then fluid concrete, when reaching designing requirement Deng concrete component intensity, steel strand are through in the preserved pipeline, install interior supporting body at member, outer supporting body, the high strength cramping body, mounting limit plate again, jack, instrument anchor slab and tool clamping piece etc. utilize jack, limiting plate, the extended steel twisted wires such as moveable anchor, oil return unloading after pulling force reaches controlling value, the steel strand resilience, the high strength cramping body is brought in the interior supporting body taper hole, thereby clamped steel strand, but in the process of steel strand resilience, can make and produce approximately the slit of 6mm (being that steel strand produce the 6mm amount of recovery) between interior supporting body and the supporting body backing plate, carry out again the stretch-draw second time, make outer supporting body push against the supporting body backing plate by rotating outer supporting body, make pulling force reach later on oil return unloading of design load.At this moment the amount of recovery of ground tackle will be controlled in the 1mm, and anchoring efficiency is greatly enhanced.
Described interior supporting body is designed with 8 taper holes of evenly arranging, and cone angle is 6.5 °～7.5 °, and cylindrical is designed with screw thread M132, and supporting capacity is strong; Described outer supporting body one end is designed to the outer-hexagonal nut, and the jack that can match with it is used in conjunction with, and internal thread is designed to M132, guarantee to cooperate with anchor ring, and bearing high strength load; Described high strength cramping body adopts 2 chips, cone angle is 6.5 °～7.5 °, be used in conjunction with anchor ring, thread form adopts particular design, and tooth is apart from being 1.25, and angle of thread is 75 °～85 °, when the high-strength load of carrying, guarantee that it had both had good intensity, have again from the anchor performance, presstressed reinforcing steel is un-slipped, do not bite broken.
Intensity of the present utility model can reach 1860Mpa, although traditional sheet clamping type group anchor product can the vertical short presstressed reinforcing steel of anchoring high strength, but its amount of recovery is about 4～6mm, greatly affect anchoring efficiency, take the long short presstressed reinforcing steel of a branch of 3m as example, when if the ground tackle amount of recovery is 6mm, its loss of prestress will reach 28%.And high strength and large specification 8 holes low retraction ground tackle adopts single ground tackle stretch-draw 8 bundle presstressed reinforcing steels, not only can reach the high strength requirement of bridge design, and anchor ring and nut are used in conjunction with, and the ground tackle amount of recovery is controlled in the 1mm, and the ground tackle anchoring property is greatly enhanced.
The utility model has the advantages that:
The utility model reasonable in design, intensity can reach 1860Mpa, not only can reach the high strength requirement of bridge design, and is used in conjunction with by anchor ring and nut, and the ground tackle amount of recovery is controlled in the 1mm, and the ground tackle anchoring property is greatly enhanced.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is outer supporting body front view.
Fig. 3 is interior supporting body structural representation.
Fig. 4 is high strength supporting body structural representation.
The specific embodiment
Referring to accompanying drawing, the low retraction of a kind of high strength ground tackle, include high strength cramping body 1, interior supporting body 2, outer supporting body 3, supporting body backing plate 4, spiral bar 5, prestress wire 6, bellows 7 consists of, one end of bellows 7 cooperates with supporting body backing plate 4, and whole by spiral bar 5 fixing and lockings, prestress wire 6 passes bellows 7, the passage that supporting body backing plate 4 consists of, the end that prestress wire 6 is positioned at supporting body backing plate 4 is equipped with supporting body 2, outer supporting body 3, high strength cramping body 1, adopt threaded engagement between interior supporting body 2 and the outer supporting body 3, high strength cramping body 1 adopts the two-piece type structure, cooperates with interior supporting body taper hole after its two combinations; Be distributed with 8 taper holes of evenly arranging 9 on the interior supporting body 2, its cone angle is 6.5 °～7.5 °, and its cylindrical is provided with the external screw thread of M132; One end of outer supporting body 3 is designed to outer-hexagonal nut 10, and the jack that can match with it is used in conjunction with, and is provided with the internal thread of M132 in its endoporus; The cone angle of high strength cramping body 1 cooperates with the cone angle of interior supporting body 2 and is respectively 6.5 °～7.5 °, and tooth is apart from being 1.25, and angle of thread is 75 °～85 °, and the end of high strength cramping body 1 is equipped with jump ring 8.
Claims (4)
1. a high strength is hanged down the retraction ground tackle, include the high strength cramping body, interior supporting body, outer supporting body, the supporting body backing plate, spiral bar, prestress wire, bellows consists of, it is characterized in that: an end of described bellows cooperates with the supporting body backing plate, and whole by the spiral bar fixing and locking, described prestress wire passes bellows, the passage that the supporting body backing plate consists of, the end that described prestress wire is positioned at the supporting body backing plate is equipped with supporting body, outer supporting body, the high strength cramping body, adopt threaded engagement between described interior supporting body and the outer supporting body, described high strength cramping body adopts the two-piece type structure, cooperates with interior supporting body taper hole after its two combinations.
2. a kind of high strength according to claim 1 is hanged down the retraction ground tackle, and it is characterized in that: be distributed with 8 taper holes of evenly arranging on the described interior supporting body, its cone angle is 6.5 °～7.5 °, and its cylindrical is provided with the external screw thread of M132.
3. a kind of high strength according to claim 1 is hanged down the retraction ground tackle, and it is characterized in that: an end of described outer supporting body is designed to the outer-hexagonal nut, and the jack that can match with it is used in conjunction with, and is provided with the internal thread of M132 in its endoporus.
4. a kind of high strength according to claim 1 is hanged down the retraction ground tackle, it is characterized in that: the cone angle of described high strength cramping body cooperates with the cone angle of interior supporting body and is respectively 6.5 °～7.5 °, the tooth distance is 1.25, angle of thread is 75 °～85 °, and the end of described high strength cramping body is equipped with jump ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220325338 CN202705897U (en) | 2012-07-06 | 2012-07-06 | High strength low retracting anchorage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220325338 CN202705897U (en) | 2012-07-06 | 2012-07-06 | High strength low retracting anchorage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202705897U true CN202705897U (en) | 2013-01-30 |
Family
ID=47586215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220325338 Expired - Lifetime CN202705897U (en) | 2012-07-06 | 2012-07-06 | High strength low retracting anchorage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202705897U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174094A (en) * | 2013-03-15 | 2013-06-26 | 合肥惠利普电机有限公司 | Resilience prevention bridge girder prestress tension device |
| CN104652287A (en) * | 2015-02-25 | 2015-05-27 | 林同棪国际工程咨询（中国）有限公司 | Bridge pre-stress tension device |
| CN104690665A (en) * | 2015-02-16 | 2015-06-10 | 沈阳工业大学 | Double-layer jig for fatigue elongation test of ordinary steel bar and prestressed steel bar, as well as mounting technique for double-layer jig |
| CN106812257A (en) * | 2015-12-01 | 2017-06-09 | 衡阳市新德力预应力有限公司 | A kind of prestress anchoraging stretching end anticorrosion structure |
| CN109137733A (en) * | 2018-08-14 | 2019-01-04 | 中铁大桥局集团有限公司 | A kind of the tensioning support device and method for stretching of low retraction anchorage |
-
2012
- 2012-07-06 CN CN 201220325338 patent/CN202705897U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174094A (en) * | 2013-03-15 | 2013-06-26 | 合肥惠利普电机有限公司 | Resilience prevention bridge girder prestress tension device |
| CN104690665A (en) * | 2015-02-16 | 2015-06-10 | 沈阳工业大学 | Double-layer jig for fatigue elongation test of ordinary steel bar and prestressed steel bar, as well as mounting technique for double-layer jig |
| CN104690665B (en) * | 2015-02-16 | 2017-04-19 | 沈阳工业大学 | Double-layer jig for fatigue elongation test of ordinary steel bar and prestressed steel bar, as well as mounting technique for double-layer jig |
| CN104652287A (en) * | 2015-02-25 | 2015-05-27 | 林同棪国际工程咨询（中国）有限公司 | Bridge pre-stress tension device |
| CN104652287B (en) * | 2015-02-25 | 2016-06-22 | 林同棪国际工程咨询（中国）有限公司 | Bridge prestress tensioning equipment |
| CN106812257A (en) * | 2015-12-01 | 2017-06-09 | 衡阳市新德力预应力有限公司 | A kind of prestress anchoraging stretching end anticorrosion structure |
| CN109137733A (en) * | 2018-08-14 | 2019-01-04 | 中铁大桥局集团有限公司 | A kind of the tensioning support device and method for stretching of low retraction anchorage |
| CN109137733B (en) * | 2018-08-14 | 2020-06-09 | 中铁大桥局集团有限公司 | Tensioning support device and tensioning method of low-retraction anchor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |
|
| CX01 | Expiry of patent term |