CN103556785A - Retraction compensating type nut clamping piece anchor as well as anchor tensioning method - Google Patents
Retraction compensating type nut clamping piece anchor as well as anchor tensioning method Download PDFInfo
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- CN103556785A CN103556785A CN201310601554.2A CN201310601554A CN103556785A CN 103556785 A CN103556785 A CN 103556785A CN 201310601554 A CN201310601554 A CN 201310601554A CN 103556785 A CN103556785 A CN 103556785A
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- ptk
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Abstract
The invention discloses a retraction compensating type nut clamping piece clamp as well as an anchor tensioning method, relates to an anchor used for the civil engineering field as well as an anchor tensioning method and aims at solving problems of an existing anchor that anchorage loss is difficult to control and needed effective prestress can not be established. The anchor comprises an external nut and an internal anchor ring which are in threaded connection, wherein three to ten side slots are uniformly formed in the outer diameter surface of the external nut; the section of a wedge-shaped hole is gradually reduced from outside to inside; an external wedge-shaped conical barrel is formed by buckling two semicircular conical clamping pieces; a ring slot is formed in radial outer surface, close to a large diameter end, of the wedge-shaped conical barrel; the wedge-shaped conical barrel is arranged in the wedge-shaped hole. The anchor tensioning method comprises the following steps: firstly, covering a prestress rib with the internal anchor ring, stuffing the wedge-shaped conical barrel into the wedge-shaped hole, and jacking the wedge-shaped conical barrel into the internal anchor ring by a lifting jack; secondly, withdrawing from the lifting jack; and thirdly, screwing the external nut into the internal anchor ring with external threads, installing a tensioning supporting pin on the front end surface of a concrete component, and finally screwing up the external nut. The retraction compensating type nut clamping piece clamp as well as the anchor tensioning method disclosed by the invention is used for anchoring the prestress rib in a concrete structure.
Description
Technical field
The present invention relates to a kind of ground tackle for field of civil engineering and an anchor method, be specifically related to the compensation nut clamp sheet ground tackle of a kind of retraction and an anchor method.
Background technology
In prestressed reinforced concrete construction, after tension of prestressed tendon, need by intermediate plate ground tackle anchoring prestress muscle; The intermediate plate of anchoring process slides and anchor deformation will cause the retraction of presstressed reinforcing steel, makes presstressed reinforcing steel produce anchorage loss.For needs, strictly control loss of prestress and the accurate structural element of controlling effective prestress, or the shorter situation of the presstressed reinforcing steel of arranging in concrete structure member, adopt the conventional method of strand tapered anchorage anchoring prestress muscle to be difficult to control anchorage loss, cannot set up needed effective prestress.
Summary of the invention
The object of the invention is to be difficult to control anchorage loss for solving existing ground tackle, cannot set up the problem of needed effective prestress, and the compensation nut clamp sheet ground tackle of a kind of retraction and an anchor method are provided.
Of the present invention being achieved through the following technical solutions:
The compensation nut clamp sheet ground tackle that bounces back comprises outer nut and interior anchor ring, described outer nut is screw collar, the external surface of described interior anchor ring is provided with external screw thread, described outer nut is arranged on the bottom of interior anchor ring, and outer nut is threaded with interior anchor ring, the compensation nut clamp sheet ground tackle of described retraction also comprises wedge shape cone cylinder, the external diameter surface of described outer nut is laid with three～ten side channels, the center of described interior anchor ring is provided with wedged hole, the cross section of described wedged hole reduces from outside to inside gradually, described outer wedge shape cone cylinder is fastened and is formed by two half cone-shaped intermediate plates, each half cone-shaped intermediate plate center is along its length provided with clip groove, the upper radially-outer surface near bigger diameter end of wedge shape cone cylinder is provided with annular groove, described wedge shape cone cylinder is arranged in wedged hole.
Compensation the anchor method that bounce back realized by following steps:
Step 1, interior anchor ring is sleeved on presstressed reinforcing steel, wedge shape is bored to tube plug and enter in wedged hole, by jack, wedge shape cone cylinder is headed in interior anchor ring, the stretching control force that jack heads into interior anchor ring is 0.4f
ptk≤ σ
con≤ 0.75f
ptk, wherein: σ
confor tension stress, f
ptkfor presstressed reinforcing steel ultimate strength standard value;
The present invention compared with prior art has following beneficial effect:
One, the compensation that the present invention bounces back to presstressed reinforcing steel by outer nut, interior anchor ring and wedge shape cone cylinder, avoided adopting in conventional ground tackle anchoring prestress muscle process because larger anchorage loss makes the uncontrollable difficult problem of effective prestress of setting up in presstressed reinforcing steel, effectively met the strict concrete structure of controlling loss of prestress and effective prestress of needs, or arranged that presstressed reinforcing steel in the structural element of shorter presstressed reinforcing steel opens the needs of anchor.
Two, the present invention has feature simple in structure, easy construction.
Accompanying drawing explanation
Fig. 1 is the main sectional view of the overall structure of the specific embodiment one,
Fig. 2 is the front view of half cone-shaped intermediate plate 3-1,
Fig. 3 is the schematic diagram (in figure, mark 7 is that spiral Indirect reinforcement, 8 is anchor slab) of step 1 in the specific embodiment two,
Fig. 4 is the schematic diagram of step 2 in the specific embodiment two.
The specific embodiment
The specific embodiment one: present embodiment is described in conjunction with Fig. 1 and Fig. 2, present embodiment comprises outer nut 1 and interior anchor ring 2, described outer nut 1 is screw collar, the external surface of described interior anchor ring 2 is provided with external screw thread, outer nut 1 is arranged on the bottom of interior anchor ring 2, and outer nut 1 is threaded with interior anchor ring 2, the compensation nut clamp sheet ground tackle that bounces back also comprises wedge shape cone cylinder 3, the external diameter surface of outer nut 1 is laid with three～ten side channel 1-1, the center of interior anchor ring 2 is provided with wedged hole 2-1, the cross section of described wedged hole 2-1 reduces from outside to inside gradually, outer wedge shape cone cylinder 3 is fastened and is formed by two half cone-shaped intermediate plate 3-1, each half cone-shaped intermediate plate 3-1 center is along its length provided with clip groove 3-2, radially-outer surface near bigger diameter end on wedge shape cone cylinder 3 is provided with annular groove 3-3, described wedge shape cone cylinder 3 is arranged in wedged hole 2-1.Side channel 1-1 has played the effect that convenience screws nut.
The specific embodiment two: in conjunction with Fig. 1, present embodiment is described, present embodiment is that the quantity of side channel 1-1 is five.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment three: in conjunction with Fig. 1, present embodiment is described, present embodiment is that the quantity of side channel 1-1 is eight.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment four: in conjunction with Fig. 3 and Fig. 4, present embodiment is described, present embodiment realizes by following steps:
Step 1, interior anchor ring 2 is sleeved on presstressed reinforcing steel 4, wedge shape cone cylinder 3 is filled in wedged hole 2-1, by jack 5, wedge shape cone cylinder 3 is headed in interior anchor ring 2, the stretching control force that jack 5 heads into interior anchor ring 2 is 0.4f
ptk≤ σ
con≤ 0.75f
ptk, wherein: σ
confor tension stress, f
ptkfor presstressed reinforcing steel ultimate strength standard value, by wedge shape, bore the anchoring for the first time that cylinder 3 and the wedge action of interior anchor ring 2 have realized presstressed reinforcing steel 4, see Fig. 3;
The specific embodiment five: in conjunction with Fig. 3 and Fig. 4, present embodiment is described, present embodiment is when presstressed reinforcing steel 4 is steel wire or steel strand, the value of the tension stress in step 1 and step 3: 0.45f
ptk≤ σ
con≤ 0.7f
ptk.Other step is identical with the specific embodiment four.
The specific embodiment six: in conjunction with Fig. 3 and Fig. 4, present embodiment is described, present embodiment is when presstressed reinforcing steel 4 is steel wire or steel strand, the value of the tension stress in step 1 and step 3: 0.5f
ptk≤ σ
con≤ 0.65f
ptk.Other step is identical with the specific embodiment four.
The specific embodiment seven: in conjunction with Fig. 3 and Fig. 4, present embodiment is described, present embodiment is when presstressed reinforcing steel 4 is steel wire or steel strand, the value of the tension stress in step 1 and step 3: 0.55f
ptk≤ σ
con≤ 0.6f
ptk.Other step is identical with the specific embodiment four.
The specific embodiment eight: in conjunction with Fig. 3 and Fig. 4, present embodiment is described, present embodiment is when presstressed reinforcing steel 4 is middle intensity steel wire, the value of the tension stress in step 1 and step 3: 0.45f
ptk≤ σ
con≤ 0.7f
ptk.Other step is identical with the specific embodiment four.
The specific embodiment nine: in conjunction with Fig. 3 and Fig. 4, present embodiment is described, present embodiment is when presstressed reinforcing steel 4 is middle intensity steel wire, the value of the tension stress in step 1 and step 3: 0.5f
ptk≤ σ
con≤ 0.65f
ptk.Other step is identical with the specific embodiment four.
The specific embodiment ten: in conjunction with Fig. 3 and Fig. 4, present embodiment is described, present embodiment is when presstressed reinforcing steel 4 is middle intensity steel wire, the value of the tension stress in step 1 and step 3: 0.55f
ptk≤ σ
con≤ 0.6f
ptk.Other step is identical with the specific embodiment four.
Claims (10)
- One kind retraction compensation nut clamp sheet ground tackle, the compensation nut clamp sheet ground tackle of described retraction comprises outer nut (1) and interior anchor ring (2), described outer nut (1) is screw collar, the external surface of described interior anchor ring (2) is provided with external screw thread, described outer nut (1) is arranged on the bottom of interior anchor ring (2), and outer nut (1) is threaded with interior anchor ring (2), it is characterized in that: the compensation nut clamp sheet ground tackle of described retraction also comprises wedge shape cone cylinder (3), the external diameter surface of described outer nut (1) is laid with three～ten side channels (1-1), the center of described interior anchor ring (2) is provided with wedged hole (2-1), the cross section of described wedged hole (2-1) reduces from outside to inside gradually, described outer wedge shape cone cylinder (3) is fastened and is formed by two half cone-shaped intermediate plates (3-1), each half cone-shaped intermediate plate (3-1) center is along its length provided with clip groove (3-2), the upper radially-outer surface near bigger diameter end of wedge shape cone cylinder (3) is provided with annular groove (3-3), described wedge shape cone cylinder (3) is arranged in wedged hole (2-1).
- 2. the compensation nut clamp sheet ground tackle that bounces back according to claim 1, is characterized in that: the quantity of described side channel (1-1) is five.
- 3. the compensation nut clamp sheet ground tackle that bounces back according to claim 1, is characterized in that: the quantity of described side channel (1-1) is eight.
- 4. utilize the compensation nut clamp sheet ground tackle that bounces back described in claim 1 to realize a compensation anchor method of retraction, it is characterized in that: compensation anchor method of described retraction realized by following steps:Step 1, interior anchor ring (2) is sleeved on presstressed reinforcing steel (4), wedge shape cone cylinder (3) is filled in wedged hole (2-1), by jack (5), wedge shape cone cylinder (3) is headed in interior anchor ring (2), the stretching control force that jack (5) heads into interior anchor ring (2) is 0.4f ptk≤ σ con≤ 0.75f ptk, wherein: σ confor tension stress, f ptkfor presstressed reinforcing steel ultimate strength standard value;Step 2, exit jack (5);Step 3, outer nut (1) is screwed in and to be with on externally threaded interior anchor ring (2), stretch-draw spike (6) is arranged on the front end face of concrete component (9), it is upper that jack (5) withstands on stretch-draw spike (6), and the stretching control force that heads into of jack (5) is 0.4f ptk≤ σ con≤ 0.75f ptk, finally outer nut (1) is screwed.
- 5. compensation the anchor method that bounce back according to claim 4, is characterized in that: when presstressed reinforcing steel (4) is during for steel wire or steel strand, and the value of the tension stress in step 1 and step 3: 0.45f ptk≤ σ con≤ 0.7f ptk.
- 6. compensation the anchor method that bounce back according to claim 4, is characterized in that: when presstressed reinforcing steel (4) is during for steel wire or steel strand, and the value of the tension stress in step 1 and step 3: 0.5f ptk≤ σ con≤ 0.65f ptk.
- 7. compensation the anchor method that bounce back according to claim 4, is characterized in that: when presstressed reinforcing steel (4) is during for steel wire or steel strand, and the value of the tension stress in step 1 and step 3: 0.55f ptk≤ σ con≤ 0.6f ptk.
- 8. compensation the anchor method that bounce back according to claim 4, is characterized in that: when presstressed reinforcing steel (4) is during for middle intensity steel wire, and the value of the tension stress in step 1 and step 3: 0.45f ptk≤ σ con≤ 0.7f ptk.
- 9. compensation the anchor method that bounce back according to claim 4, is characterized in that: when presstressed reinforcing steel (4) is during for middle intensity steel wire, and the value of the tension stress in step 1 and step 3: 0.5f ptk≤ σ con≤ 0.65f ptk.
- 10. compensation the anchor method that bounce back according to claim 4, is characterized in that: when presstressed reinforcing steel (4) is during for middle intensity steel wire, and the value of the tension stress in step 1 and step 3: 0.55f ptk≤ σ con≤ 0.6f ptk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310601554.2A CN103556785A (en) | 2013-11-25 | 2013-11-25 | Retraction compensating type nut clamping piece anchor as well as anchor tensioning method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310601554.2A CN103556785A (en) | 2013-11-25 | 2013-11-25 | Retraction compensating type nut clamping piece anchor as well as anchor tensioning method |
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| CN103556785A true CN103556785A (en) | 2014-02-05 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453099A (en) * | 2014-11-25 | 2015-03-25 | 沈阳建筑大学 | Fine adjustment anchor capable of compensating prestress loss and method |
| CN104453100A (en) * | 2014-12-01 | 2015-03-25 | 沈阳工业大学 | Prestressed anchorage device for ultra-short prestressed beam for test and tensioning process thereof |
| CN104895334A (en) * | 2015-06-15 | 2015-09-09 | 哈尔滨工业大学 | Real-time pre-stress monitoring type clip anchoring tool and anchoring tool tension method thereof |
| CN105064695A (en) * | 2015-08-17 | 2015-11-18 | 长沙理工大学 | Secondary tensioning and releasing device and method for prestressed tendons |
| CN106193459A (en) * | 2016-07-19 | 2016-12-07 | 成都鹏程路桥机械有限公司 | A kind of deformed bar anchorage |
| CN107165061A (en) * | 2017-07-04 | 2017-09-15 | 北京市市政四建设工程有限责任公司 | A kind of prestressed anchor and tensioning equipment |
| CN107708948A (en) * | 2015-06-19 | 2018-02-16 | 东京制纲株式会社 | The tensioning method and wedge of continuous lod material tensioning apparatus, continuous lod material |
| CN110761563A (en) * | 2019-10-22 | 2020-02-07 | 江苏科技大学 | Steel strand prestress applying device and method and prestress steel structure stair |
| CN111705993A (en) * | 2020-06-24 | 2020-09-25 | 王子国 | Prestressed restraint block and composite armor structure |
| CN112324154A (en) * | 2020-11-05 | 2021-02-05 | 重庆交通大学 | Prestressed tendon anchoring method capable of preventing retraction deformation loss and clamping piece assembly |
| CN114215275A (en) * | 2021-12-27 | 2022-03-22 | 中铁第一勘察设计院集团有限公司 | Prestressed concrete structure |
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| US5630301A (en) * | 1995-05-25 | 1997-05-20 | Harris P/T, A Division Of Harris Steel Limited | Anchorage assembly and method for post-tensioning in pre-stressed concrete structures |
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| US5630301A (en) * | 1995-05-25 | 1997-05-20 | Harris P/T, A Division Of Harris Steel Limited | Anchorage assembly and method for post-tensioning in pre-stressed concrete structures |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453099A (en) * | 2014-11-25 | 2015-03-25 | 沈阳建筑大学 | Fine adjustment anchor capable of compensating prestress loss and method |
| CN104453099B (en) * | 2014-11-25 | 2016-06-15 | 沈阳建筑大学 | A kind of fine setting ground tackle and method that can compensate loss of prestress |
| CN104453100B (en) * | 2014-12-01 | 2016-08-24 | 沈阳工业大学 | Test with the tensioning process of ultrashort prestressed girder anchorage |
| CN104453100A (en) * | 2014-12-01 | 2015-03-25 | 沈阳工业大学 | Prestressed anchorage device for ultra-short prestressed beam for test and tensioning process thereof |
| CN104895334A (en) * | 2015-06-15 | 2015-09-09 | 哈尔滨工业大学 | Real-time pre-stress monitoring type clip anchoring tool and anchoring tool tension method thereof |
| CN107708948A (en) * | 2015-06-19 | 2018-02-16 | 东京制纲株式会社 | The tensioning method and wedge of continuous lod material tensioning apparatus, continuous lod material |
| US10316517B2 (en) | 2015-06-19 | 2019-06-11 | Tokyo Rope Manufacturing Co., Ltd. | Continuous fiber reinforcing material tension apparatus, continuous fiber reinforcing material tension method, and wedge body |
| CN107708948B (en) * | 2015-06-19 | 2019-10-11 | 东京制纲株式会社 | The tensioning method and wedge of continuous fiber reinforcement material tensioning apparatus, continuous fiber reinforcement material |
| CN105064695A (en) * | 2015-08-17 | 2015-11-18 | 长沙理工大学 | Secondary tensioning and releasing device and method for prestressed tendons |
| CN106193459A (en) * | 2016-07-19 | 2016-12-07 | 成都鹏程路桥机械有限公司 | A kind of deformed bar anchorage |
| CN107165061A (en) * | 2017-07-04 | 2017-09-15 | 北京市市政四建设工程有限责任公司 | A kind of prestressed anchor and tensioning equipment |
| CN110761563A (en) * | 2019-10-22 | 2020-02-07 | 江苏科技大学 | Steel strand prestress applying device and method and prestress steel structure stair |
| CN111705993A (en) * | 2020-06-24 | 2020-09-25 | 王子国 | Prestressed restraint block and composite armor structure |
| CN111705993B (en) * | 2020-06-24 | 2024-01-05 | 王子国 | Prestress restraint block and composite armor structure |
| CN112324154A (en) * | 2020-11-05 | 2021-02-05 | 重庆交通大学 | Prestressed tendon anchoring method capable of preventing retraction deformation loss and clamping piece assembly |
| CN112324154B (en) * | 2020-11-05 | 2022-02-15 | 重庆交通大学 | Prestressed tendon anchoring method capable of preventing retraction deformation loss |
| CN114215275A (en) * | 2021-12-27 | 2022-03-22 | 中铁第一勘察设计院集团有限公司 | Prestressed concrete structure |
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Application publication date: 20140205 |