CN1640805A - Pretightening method of hoist steel strand for continuous hoist jack - Google Patents
Pretightening method of hoist steel strand for continuous hoist jack Download PDFInfo
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- CN1640805A CN1640805A CN 200410002193 CN200410002193A CN1640805A CN 1640805 A CN1640805 A CN 1640805A CN 200410002193 CN200410002193 CN 200410002193 CN 200410002193 A CN200410002193 A CN 200410002193A CN 1640805 A CN1640805 A CN 1640805A
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- jack
- steel strand
- anchor slab
- continuous lifting
- intermediate plate
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Abstract
The present invention relates to building construction technology. After completing the primary steps, the press plate on the front end of continuously lifting jack and the clamping sheet on the tie plate are loosened, one secondary clamping sheet is mounted on the tie plate to tighten the twisted steel cables one by one for pre-fastening successively, and loosened press plate and clamping sheet are repositioned to fix the twisted steel cables. Compared with available method, the present invention has high efficiency, and is simpler and safer.
Description
Technical field
The present invention relates to technical field of building construction, especially a kind of being used for before lifting member carried out pretension to the lifting steel strand in the continuous lifting jack.
Background technology
In the hydraulic pressure lift hoisting engineering, it is to realize by pumping plant and the teamwork of continuous lifting jack that a kind of lifting technology is arranged.In order to lift safely, it is stressed evenly to guarantee to promote continuously each root steel strand that each suspension centre of jack and lifting member is connected.So lifting is gone to toward carrying out pretension to each root steel strand, makes it bear the power of a given data.And existing continuous lifting jack it mainly connect to form by front end jack and rear end jack, one cover anchor slab, intermediate plate all respectively arranged for front end jack and rear end jack and by screw and anchor slab bonded assembly pressing plate, they just are fixed on pressing plate and intermediate plate on the anchor slab of front end jack and rear end jack when dispatching from the factory.When continuous lifting jack loads onto that lifting platform is in place, its oil pipe be connected with its pumping plant finish, promote continuously jack and put on steel strand and many steel strand and lifting member anchoring after, just can begin promoting the pretension operation of steel strand.
Adopt pretension method of operating to be now to promoting steel strand:
1, will promote jack and pumping plant thereof and punching jack and pumping plant thereof continuously and install in that lifting platform is in place, and put on many steel strand being used to promote and be connected anchoring one by one with member to be hoisted with promoting jack continuously;
2, the punching jack is inserted in from the termination of first steel strand to the pressing plate of the front end jack of continuous lifting jack in the upper end that promotes continuously jack, these root steel strand of clamping also are stretched to setting value, grip by the front end jack anchor slab of continuous lifting jack and the intermediate plate on the anchor slab of top, back then, discharge again the punching jack tension force, unclamp clamping, the punching jack is withdrawed from fully from the termination of first steel strand, finish pretension these root steel strand;
3, by the way in above-mentioned the 2nd step remaining each the root steel strand on the continuous lifting jack are carried out pretension one by one.
The shortcoming of above-mentioned this pre-clamping method is: use equipment is various, necessary additive incrementation punching jack and supporting equipment such as pumping plant thereof, the operating sequence complexity, steel strand of every pretension all will penetrate the punching jack with steel strand in the upper end that promotes jack continuously from the termination, and behind these steel strand of stretch-draw pretension, again these steel strand are withdrawed from the punching jack fully, this work fitness for purpose operating personal is many, especially continuously promoting jack often is installed on tens of rice even the up to a hundred meters High Altitude Platforms, to set up operation on the interim and narrow platform on the top that promotes jack continuously, operating difficulties, and very dangerous.
Summary of the invention
The invention provides a kind of pre-clamping method to lifting steel strand in the continuous lifting jack, it mainly is that the existing pre-clamping method efficient of solution is low, production tooling too much and operation inconvenience and the big problem of operational danger.
For addressing the above problem, this to the pre-clamping method that promotes steel strand in the continuous lifting jack is: it includes and will promote jack and pumping plant thereof in place installing on lifting platform continuously, to promote jack continuously and put on many lifting steel strand and be connected these prior steps of anchoring one by one with member to be hoisted, after this:
A, unclamp pressing plate on the front end jack in the continuous lifting jack and the intermediate plate on the anchor slab;
B, be contained on the anchor slab of the front end jack in the continuous lifting jack with a sub-folder sheet, first steel strand of wanting pretension of clamping, be stretched to setting value with these these root steel strand of front end jack pair that promote in the jack continuously, grip this root steel strand by the intermediate plate in the anchor slab of the rear end jack in this continuous lifting jack then, discharge the tension force of described front end jack, pull down the intermediate plate on this front end jack anchor slab, finish pretension these root steel strand;
C, remaining each the root steel strand on the continuous lifting jack are carried out pretension one by one by the way in above-mentioned B step;
D, the pressing plate that above-mentioned A was unclamped in the step and the intermediate plate on the anchor slab put in back in the anchor slab on the front end jack in the continuous lifting jack each root steel strand anchoring.
Owing to adopted such scheme the present invention compared with prior art to have following beneficial effect:
1, construction safety, efficient height.Because not needing to promote steel strand with heavier punching jack pair as existing installation method installs and pulls down from the termination one by one, therefore, not only High Altitude Platform need not many people operation, simple to operate easily and safety, and the comparable existing method of work efficiency improves 400%.
2, equipment is simple.Punching jack and supporting pumping plant thereof have been omitted.
Description of drawings
Fig. 1 is an application example scheme drawing of the present invention.
The specific embodiment
The invention will be further described below in conjunction with Fig. 1 example:
Step to the pre-clamping method of the lifting steel strand in the continuous lifting jack is as follows:
Prior step: will promote jack and pumping plant 9 thereof in place installing on lifting platform 10 continuously, many lifting steel strand that promote continuously on the jack will be connected anchoring with member 11 to be hoisted one by one by ground tackle 12,
After this:
A, pull down bolt 3, unclamp pressing plate 4 on the front end jack in the continuous lifting jack and the intermediate plate 2 on the anchor slab 1;
B, be contained in a sub-folder sheet 2 on the anchor slab 1 on the plunger 6 of the front end jack in the continuous lifting jack, the steel strand 5 of pretension are wanted in first of clamping, by pumping plant 9 to the front end jack cylinder body lower end of continuous lifting jack injection pressure oil, allow front end jack plunger 6 rise steel strand 5 are carried out stretch-draw, reflect the front end jack oiling pressurization that stops after the pressure of compressed oil reaches setting value to continuous lifting jack until pumping plant 9, with the intermediate plate 7 of rear end jack in the continuous lifting jack steel strand 5 are clamped on the anchor slab on 8, discharge the front end jack that promotes jack continuously by pumping plant 9 then, plunger 6 is descended, discharge the tension force of 2 pairs of steel strand 5 of intermediate plate, pull down the intermediate plate 2 on this front end jack anchor slab 1, finish pretension steel strand 5;
C, remaining each the root steel strand on the continuous lifting jack are carried out pretension one by one by the way in above-mentioned B step;
D, the pressing plate 4 that above-mentioned A was unclamped in the step and each sub-folder sheet 2 put in back in the anchor slab 1 on the front end jack in the continuous lifting jack, with each root steel strand anchoring.
Claims (1)
1, a kind of to promoting the pre-clamping method of steel strand in the continuous lifting jack, it includes and will promote jack and pumping plant thereof in place installing on lifting platform continuously, to promote jack continuously and put on many lifting steel strand and be connected these prior steps of anchoring one by one, it is characterized in that after finishing described prior step with member to be hoisted:
A, unclamp pressing plate on the front end jack in the continuous lifting jack and the intermediate plate on the anchor slab;
B, be contained on the anchor slab of the front end jack in the continuous lifting jack with a sub-folder sheet, first steel strand of wanting pretension of clamping, be stretched to setting value with these these root steel strand of front end jack pair that promote in the jack continuously, grip this root steel strand by the intermediate plate in the anchor slab of the rear end jack in this continuous lifting jack then, discharge the tension force of described front end jack, pull down the intermediate plate on this front end jack anchor slab, finish pretension these root steel strand;
C, remaining each the root steel strand on the continuous lifting jack are carried out pretension one by one by the way in above-mentioned B step;
D, the pressing plate that above-mentioned A was unclamped in the step and the intermediate plate on the anchor slab put in back in the anchor slab on the front end jack in the continuous lifting jack each root steel strand anchoring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100021930A CN100424003C (en) | 2004-01-13 | 2004-01-13 | Pretightening method of hoist steel strand for continuous hoist jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100021930A CN100424003C (en) | 2004-01-13 | 2004-01-13 | Pretightening method of hoist steel strand for continuous hoist jack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1640805A true CN1640805A (en) | 2005-07-20 |
| CN100424003C CN100424003C (en) | 2008-10-08 |
Family
ID=34867314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100021930A Expired - Fee Related CN100424003C (en) | 2004-01-13 | 2004-01-13 | Pretightening method of hoist steel strand for continuous hoist jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100424003C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103332637A (en) * | 2013-03-06 | 2013-10-02 | 中国电力科学研究院 | Steel strand pretightening device |
| CN104058349A (en) * | 2013-03-22 | 2014-09-24 | 中化二建集团有限公司 | Steel strand lifting and clamping device and lifting method |
| CN104973545A (en) * | 2015-07-15 | 2015-10-14 | 中铁二十五局第四集团工程有限公司 | Tensioning equipment structure |
| CN105152069A (en) * | 2015-09-25 | 2015-12-16 | 柳州欧维姆机械股份有限公司 | Lifting jack with lifting pre-tightening device and method for lifting jack for pre-tightening lifting steel strands |
| CN105366598A (en) * | 2015-09-28 | 2016-03-02 | 中国一冶集团有限公司 | Hydraulic lifting method for gas holder top |
| WO2018072589A1 (en) * | 2016-10-18 | 2018-04-26 | 柳州黔桥工程材料有限公司 | Automated and synchronized control system for bundled steel strand anchoring |
| CN108002282A (en) * | 2017-12-29 | 2018-05-08 | 上海市机械施工集团有限公司 | A kind of steel construction integral lifting apparatus and its application method |
| WO2019166025A1 (en) * | 2018-02-28 | 2019-09-06 | 中国矿业大学 | Mechanical constant-resistance single prop continuous prop lifting pre-tightening device and method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2172761Y (en) * | 1993-07-23 | 1994-07-27 | 郝晋升 | Asynchronous traction device |
| CN2203966Y (en) * | 1993-12-04 | 1995-07-26 | 郝晋升 | Single cylinder multi-head jack |
| CN2183987Y (en) * | 1993-12-04 | 1994-11-30 | 郝晋升 | Asynchronous lifter with single cylinder and muti-rod |
| CN2224833Y (en) * | 1994-12-30 | 1996-04-17 | 郝晋升 | Straining jack |
| JP2937310B2 (en) * | 1995-02-14 | 1999-08-23 | 紀二 替場 | Anchor steel wire tension jack |
| CN2399366Y (en) * | 1999-12-31 | 2000-10-04 | 开封科英预应力锚具厂 | Four-action tension jack |
-
2004
- 2004-01-13 CN CNB2004100021930A patent/CN100424003C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103332637A (en) * | 2013-03-06 | 2013-10-02 | 中国电力科学研究院 | Steel strand pretightening device |
| CN103332637B (en) * | 2013-03-06 | 2015-07-08 | 中国电力科学研究院 | Steel strand pretightening device |
| CN104058349A (en) * | 2013-03-22 | 2014-09-24 | 中化二建集团有限公司 | Steel strand lifting and clamping device and lifting method |
| CN104058349B (en) * | 2013-03-22 | 2016-02-17 | 中化二建集团有限公司 | A kind of steel strand hoisting clamping device and method for improving |
| CN104973545A (en) * | 2015-07-15 | 2015-10-14 | 中铁二十五局第四集团工程有限公司 | Tensioning equipment structure |
| CN105152069A (en) * | 2015-09-25 | 2015-12-16 | 柳州欧维姆机械股份有限公司 | Lifting jack with lifting pre-tightening device and method for lifting jack for pre-tightening lifting steel strands |
| CN105366598A (en) * | 2015-09-28 | 2016-03-02 | 中国一冶集团有限公司 | Hydraulic lifting method for gas holder top |
| WO2018072589A1 (en) * | 2016-10-18 | 2018-04-26 | 柳州黔桥工程材料有限公司 | Automated and synchronized control system for bundled steel strand anchoring |
| CN108002282A (en) * | 2017-12-29 | 2018-05-08 | 上海市机械施工集团有限公司 | A kind of steel construction integral lifting apparatus and its application method |
| WO2019166025A1 (en) * | 2018-02-28 | 2019-09-06 | 中国矿业大学 | Mechanical constant-resistance single prop continuous prop lifting pre-tightening device and method |
| US10844717B2 (en) | 2018-02-28 | 2020-11-24 | China University Of Mining And Technology | Mechanical constant-resistance single prop continuous prop lifting pre-tightening device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100424003C (en) | 2008-10-08 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081008 Termination date: 20200113 |