CN101725113B - Two arm-brace stretching method of arc bridge tie bar cable - Google Patents
Two arm-brace stretching method of arc bridge tie bar cable Download PDFInfo
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- CN101725113B CN101725113B CN2009102273430A CN200910227343A CN101725113B CN 101725113 B CN101725113 B CN 101725113B CN 2009102273430 A CN2009102273430 A CN 2009102273430A CN 200910227343 A CN200910227343 A CN 200910227343A CN 101725113 B CN101725113 B CN 101725113B
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Abstract
The invention discloses a two arm-brace stretching method of an arc bridge tie bar cable, comprising the following steps of: sequentially installing a working anchor, a working anchor arm brace, a rear tool anchor, a tool anchor arm brace, a hydraulic jack and a front tool anchor, enabling the working anchor and the rear tool anchor in a loosening state, clamping a prestressing steel strand by using the front tool anchor and stretching an oil cylinder by using the hydraulic jack to feed oil and pushing the front working anchor for stretching the prestressing steel strand; stopping the stretching of the oil cylinder by using the hydraulic jack to feed oil when the hydraulic jack reaches the maximum stroke, clamping the prestressing steel strand by using the rear tool anchor to enable the front tool anchor to be in a loosening state and stretching the oil cylinder by using the hydraulic jack; carrying out next round of stretching operation after stretching the oil cylinder by using the hydraulic jack to return oil in place; and clamping the prestressing steel strand by using the working anchor when the prestressing steel strand reaches the requirement. In the stretching process, a working clamping piece of the working anchor is not forced, thus the invention solves the problems that the work clamping piece of the working anchor is repeatedly forced and teeth are blocked in the stretching process of a long steel strand cable in the prior art and prolongs the service life of the working anchor.
Description
Technical field
The present invention relates to the bridge construction technical field of construction, especially relate to a kind of two arm-brace stretching method of arc bridge tie bar cable.
Background technology
The long cable stretching process of conventional steel strand, adopt a kit anchor and a cover work anchor long rope of stretch-draw steel strand that cooperatively interacts, for long rope, because the elongation of prestressing steel is greater than the stroke of jack, the jack stroke can't put in place by single tension, often need several times " to fall to push up " to finish the stretch-draw of prestressing tendon, when finishing " falling to push up " operation, the work clip sheet of work anchor repeatedly anchoring is stressed, influence its normal anchoring property, and owing to scratch prestressing steel, and cause steel strand epidermis or the stifled work clip sheet teeth of coating plug, further reduced the anchoring property of work anchor.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of two arm-brace stretching method of arc bridge tie bar cable, the work clip sheet of stretching process work anchor does not stress, solve the stressed repeatedly and teeth blocking problem of the work clip sheet of the long cable stretching process of steel strand work anchor in the prior art, prolonged the length of service of work anchor.
For achieving the above object, the present invention by the following technical solutions:
Two arm-brace stretching method of arc bridge tie bar cable of the present invention adopts two cover moveable anchors, a cover work anchor, a hydraulic jack and two spikes to operate according to following steps:
A. installation work anchor, work anchor spike, back moveable anchor, moveable anchor spike, hydraulic jack and preceding moveable anchor successively; Make work anchor be in the state of getting loose;
B. work anchor clamping prestress wire before using makes the back moveable anchor be in the state of getting loose, and work anchor carried out prestress wire stretch-draw before the oil-feed of hydraulic jack stretch-draw oil cylinder promoted;
When c. hydraulic jack arrives range, stop the oil-feed of hydraulic pressure jack tension oil cylinder, with back moveable anchor clamping prestress wire, moveable anchor is in the state of getting loose, the oil return of hydraulic jack stretch-draw oil cylinder before making;
D. after the oil return of hydraulic jack stretch-draw oil cylinder put in place, repeating step b, step c when prestress wire stretch-draw reaches the designing requirement index, stopped the oil-feed of hydraulic pressure jack tension cylinder successively;
E. use the tight prestress wire of work grip; Moveable anchor is in the state of getting loose before making, the oil return of hydraulic jack stretch-draw oil cylinder, moveable anchor, hydraulic jack, moveable anchor spike, back moveable anchor and work anchor spike before the dismounting.
Further, after described e step, check work anchor, to work anchor intermediate plate roof pressure.
Further, described work anchor and back moveable anchor include the limit assembly that has that is used to adjust the ground tackle clamp position.
The invention has the beneficial effects as follows:
Because the present invention adopts two spikes; two cover moveable anchors and two cover limit assemblies; stretching process replaces work anchor to come the clamping prestress wire with kit anchor wherein; when stretch-draw reaches designing requirement; the final anchoring prestress wire of work anchor; all do not contact with the process of falling top work anchor in whole stretch-draw with prestress wire; effectively protect the work anchor intermediate plate; avoid sustaining damage and scratching; thereby the work clip sheet that has solved the long cable stretching process of steel strand work anchor is stressed repeatedly and the teeth blocking problem; the anchoring property of assurance work ground tackle prolongs its application life.
Other advantages of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can obtain instruction from the practice of the present invention to investigating hereinafter.Target of the present invention and other advantages can realize and obtain by specifically noted structure in following manual and the accompanying drawing.
Description of drawings
Accompanying drawing is the fundamental diagram of arch bridge tie-rod Suo Shuan spike stretch-draw.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is further described.
As shown in drawings, during concrete enforcement, the employed instrument of the inventive method comprises preceding moveable anchor 9, back work anchor 5, back moveable anchor limit assembly 6, work anchor ring 1, work anchor intermediate plate 2, work anchor limit assembly 3, work anchor spike 4, moveable anchor spike 7 and hydraulic jack 8.
When carrying out tension operation, elder generation is installation work anchor ring 1, work anchor intermediate plate 2, work anchor limit assembly 3, work anchor spike 4, back moveable anchor 5, back moveable anchor limit assembly 6, moveable anchor spike 7, hydraulic jack 8 and preceding moveable anchor 9 successively.Adjust work anchor limit assembly 3 and back moveable anchor limit assembly 6 to the appropriate location, satisfy the spacing requirement of work anchor intermediate plate 2 and back moveable anchor intermediate plate.
During beginning stretch-draw, open oil pump and make jack 8 tension cylinder oil-feeds, preceding moveable anchor 9 clamping prestressed reinforcements stretch, and this process work anchor intermediate plate 2 does not all contact with prestressing steel with the intermediate plate of back moveable anchor 5, is in the state of getting loose.When jack 8 tension cylinders arrival jack stroke required, the operation oil pump stopped jack work, executes the adjusting nut of twisting back moveable anchor limit assembly 6, strains limiting plate, the intermediate plate of back work anchor 5 is pressed into the taper hole and the clamping prestress wire of back moveable anchor 5.Check errorless after, jack 8 stretch-draw oil cylinder oil returns, the tension cylinder backhaul, this moment back moveable anchor 5 clamping prestress wires, work anchor intermediate plate 2 and preceding moveable anchor 9 are in the state of getting loose.After tension cylinder put in place, moveable anchor 9 in place and clamping prestressed reinforcements before reinstalling were adjusted back moveable anchor limit assembly 6 and are made back moveable anchor 5 be in the state of getting loose to the appropriate location, then begin the stretch-draw operation of next stroke.
When prestress wire stretch-draw reaches the index of designing requirement, when needing anchoring, the operation oil pump, stop jack 8 work, execute the adjusting nut of twisting work anchor limiting plate assembly 3, strain limiting plate, work anchor intermediate plate 2 is pressed into the taper hole and the clamping prestress wire of work anchor.Check errorless after, jack 8 stretch-draw oil cylinder oil returns, tension cylinder backhaul, moveable anchor 9 before the dismounting, very heavy 8, moveable anchor spike 7 back moveable anchor limiting plate assemblies 6, back moveable anchor 5, work anchor spike 4 and work anchor limiting plate assembly 3 successively.Check work anchor anchoring situation, in case of necessity,, locking device is installed the work clip sheet roof pressure.In the whole operation process, the stretch-draw oil cylinder of jack 8 refers to the oil cylinder in jack 8 left sides in the accompanying drawing.
The distinguishing feature of two spike stretching methods is in the present embodiment; work clip sheet is clamping prestress wire when final anchoring only; all do not contact with the process of falling the top in stretch-draw with prestress wire; thereby effectively protect work clip sheet; avoid sustaining damage and scratching; the anchoring property of assurance work ground tackle increases the service life.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, other modifications that those of ordinary skills make technical scheme of the present invention or be equal to replacement, only otherwise break away from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of the claim scope of the present invention.
Claims (3)
1. a two arm-brace stretching method of arc bridge tie bar cable is characterized in that, adopts two cover moveable anchors, a cover work anchor, a hydraulic jack and two spikes to operate according to following steps:
A. installation work anchor, work anchor spike, back moveable anchor, moveable anchor spike, hydraulic jack and preceding moveable anchor successively; Make work anchor be in the state of getting loose;
B. work anchor clamping prestress wire before using makes the back moveable anchor be in the state of getting loose, and work anchor carried out prestress wire stretch-draw before the oil-feed of hydraulic jack stretch-draw oil cylinder promoted;
When c. hydraulic jack arrives range, stop the oil-feed of hydraulic pressure jack tension oil cylinder, with back moveable anchor clamping prestress wire, moveable anchor is in the state of getting loose, the oil return of hydraulic jack stretch-draw oil cylinder before making;
D. after the oil return of hydraulic jack stretch-draw oil cylinder put in place, repeating step b, step c when prestress wire stretch-draw reaches the designing requirement index, stopped the oil-feed of hydraulic pressure jack tension cylinder successively;
E. use the tight prestress wire of work grip; Moveable anchor is in the state of getting loose before making, the oil return of hydraulic jack stretch-draw oil cylinder, moveable anchor, hydraulic jack, moveable anchor spike, back moveable anchor and work anchor spike before the dismounting.
2. two arm-brace stretching method of arc bridge tie bar cable according to claim 1 is characterized in that, after described e step, checks work anchor, to work anchor intermediate plate roof pressure.
3. two arm-brace stretching method of arc bridge tie bar cable according to claim 1 and 2 is characterized in that, described work anchor and back moveable anchor include the limit assembly that has that is used to adjust the ground tackle clamp position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102273430A CN101725113B (en) | 2009-12-08 | 2009-12-08 | Two arm-brace stretching method of arc bridge tie bar cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102273430A CN101725113B (en) | 2009-12-08 | 2009-12-08 | Two arm-brace stretching method of arc bridge tie bar cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101725113A CN101725113A (en) | 2010-06-09 |
| CN101725113B true CN101725113B (en) | 2011-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102273430A Expired - Fee Related CN101725113B (en) | 2009-12-08 | 2009-12-08 | Two arm-brace stretching method of arc bridge tie bar cable |
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| Country | Link |
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| CN (1) | CN101725113B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155094B (en) * | 2011-01-30 | 2012-05-23 | 中冶建工有限公司 | Method for controlling pre-stress tension failure for reinforced concrete |
| CN103485486A (en) * | 2013-09-13 | 2014-01-01 | 中南林业科技大学 | Novel open type steel strand anchor |
| CN103482521B (en) * | 2013-10-17 | 2015-12-09 | 中国核工业华兴建设有限公司 | A kind of steel strand tension jack |
| CN105064214B (en) * | 2015-07-23 | 2016-08-24 | 中铁大桥(郑州)缆索有限公司 | A kind of inclined guy cable stretching device eliminating back twist |
| CN106545539B (en) * | 2015-09-21 | 2019-04-30 | 襄阳中铁宏吉工程技术有限公司 | A kind of tensioning buried anchor inner blocking type hydraulic cylinder |
| CN105329826B (en) * | 2015-12-11 | 2017-11-03 | 天津市天锻压力机有限公司 | Large structure pulling equipment and draw operations method |
| CN108408635A (en) * | 2018-04-28 | 2018-08-17 | 东南大学 | A kind of combined bay that lifting jack detachable load is combined with guiding |
| CN113756441A (en) * | 2020-06-05 | 2021-12-07 | 中国二十冶集团有限公司 | Large-span net rack anchor head inhaul cable and arc-shaped net rack tensioning method |
| CN113137454B (en) * | 2021-04-07 | 2024-06-25 | 中铁工程装备集团盾构制造有限公司 | Anchor clamp assembly, steel wire rope traction device and method |
| CN114808727A (en) * | 2022-05-12 | 2022-07-29 | 湖南联智智能科技有限公司 | Automatic control method for prestress multi-stroke tensioning |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200978388Y (en) * | 2006-12-06 | 2007-11-21 | 江阴法尔胜住电新材料有限公司 | Steel strand inclined dragline force conversion device |
| CN101260741A (en) * | 2007-03-05 | 2008-09-10 | 柳州欧维姆机械股份有限公司 | Short bundle cable stretching caging device and method for stretching and anchoring |
| JP2008231700A (en) * | 2007-03-16 | 2008-10-02 | Anderson Technology Kk | Flat anchorage device for post-tensioned type prestressed concrete floor slab, post-tensioned type prestressed concrete floor slab using the anchorage device, and construction method for the post-tensioned type prestressed concrete floor slab |
-
2009
- 2009-12-08 CN CN2009102273430A patent/CN101725113B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200978388Y (en) * | 2006-12-06 | 2007-11-21 | 江阴法尔胜住电新材料有限公司 | Steel strand inclined dragline force conversion device |
| CN101260741A (en) * | 2007-03-05 | 2008-09-10 | 柳州欧维姆机械股份有限公司 | Short bundle cable stretching caging device and method for stretching and anchoring |
| JP2008231700A (en) * | 2007-03-16 | 2008-10-02 | Anderson Technology Kk | Flat anchorage device for post-tensioned type prestressed concrete floor slab, post-tensioned type prestressed concrete floor slab using the anchorage device, and construction method for the post-tensioned type prestressed concrete floor slab |
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| Publication number | Publication date |
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| CN101725113A (en) | 2010-06-09 |
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Granted publication date: 20110209 Termination date: 20111208 |