CN102953549B - Novel quick tensioning construction method for front-blocked jack - Google Patents
Novel quick tensioning construction method for front-blocked jack Download PDFInfo
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- CN102953549B CN102953549B CN201110253279.0A CN201110253279A CN102953549B CN 102953549 B CN102953549 B CN 102953549B CN 201110253279 A CN201110253279 A CN 201110253279A CN 102953549 B CN102953549 B CN 102953549B
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Abstract
The invention relates to a novel quick tensioning construction method for a front-blocked jack. The novel quick tensioning construction method is applicable to the tensioning construction of a bridge pre-stressed projects in traffic engineering (such as bridge engineering, railway engineering, highway engineering and municipal engineering) and pre-stressed structure projects in the building industry. According to the novel quick tensioning construction method for the front-blocked jack, a steel strand in a beam is tensioned by the front-blocked jack. The novel quick tensioning construction method for the front-blocked jack is characterized by comprising the following steps: sequentially mounting working clips on steel strand bundles on the beam; fastening and positioning the working clips; then mounting limiting plates which are matched in diameter on the steel strands; mounting a lengthening sleeve, the front-blocked jack and tool clips; quickly tensioning; and returning oil and releasing. The novel quick tensioning construction method for the front-blocked jack combines the advantages of various domestic construction technologies based on front-blocked jacks and rear-blocked jacks, and is simple, safe, quick, efficient, environmentally friendly and energy-saving, greatly improves the production efficiency, reduces the construction cost, and reduces the construction period.
Description
Technical field
The present invention relates to front clip type jack quick tensioning construction method and be adapted to different types of rridges, in the stretching construction of the bridge prestress engineerings of traffic engineering such as railway, highway, municipal administration and the prestressed structure engineering of builing industry.
Background technology
The domestic prestress tensioning equipment for the Engineering such as traffic, building of China mostly is traditional rear clip type jack, and the steel strand exposed are longer, and cost is high, waste is large.Clip type jack before the minority of the domestic appearance of current China: the anchor hole center to center distance had can not adapt to existing work anchor too greatly, and application is limited to very much; The bad handling of some manufacturabilities are inconvenient, therefore widely applied.
Summary of the invention
In order to make up the deficiencies in the prior art, invention provides a kind of and saves material and the high front clip type jack quick tensioning construction method of efficiency.
Invention is achieved by the following technical solution:
Clip type jack quick tensioning construction method before a kind of, strained by the steel strand of beam inside by jack, its construction method comprises, and its processing step is as follows:
One, the fast blanking of steel strand, lashing: steel strand are adopted CSJ15-1A steel strand strand pulling machine pair
Bridge carries out lashing and blanking;
Two, clip type jack accessory before Fast Installation
1. installation work intermediate plate: work clip sheet is arranged on steel strand, steel strand are fastening;
2. mounting limit plate: by the limiting plate matched with steel strand diameter, accurate contraposition is installed;
Three, clip type jack before installing: first the stretch-draw oil circuit of oil pump is connect front clip type jack stretch-draw chamber oil nozzle, stretch-draw oil circuit also received by calibrated pressure meter simultaneously, oil pump backhaul oil circuit connects the backhaul oil nozzle of front clip type jack, and the safety valve of stretch-draw oil circuit is adjusted to 10MPa, then before utilizing the hoisting frame be fixed on prefabricated case beam to promote, clip type jack is to stretching notch, and rapid-aligning is installed;
Four, fast fixing tool anchor: bearing pin and draw-in groove are turned an angle, bearing pin and draw-in groove are in can connection status, can complete the installation of moveable anchor;
Five, erecting tools intermediate plate: ready tool clamping piece will be shifted to an earlier date and install fastened in place;
Six, quick tensioning: open switch, stretch-draw oil circuit fuel feeding hydraulic oil is filled with stretch-draw oil pocket, promotion cylinder body advance and cylinder body outwards move, and the hydraulic oil of the oil circuit of backhaul is simultaneously flowed in the fuel tank of oil pump by backhaul oil circuit, and backhaul oil circuit now must be open mode;
Seven, oil return pine: open oil return switch backhaul oil circuit fuel feeding, the oil return of stretch-draw oil circuit, hydraulic oil is filled with backhaul oil pocket, promotes cylinder body and retreats retraction, the hydraulic oil of the oil circuit of backhaul is simultaneously flowed in the fuel tank of oil pump by stretch-draw oil circuit, and stretch-draw oil circuit now must be open mode;
Eight, moveable anchor move back anchor, dismounting fast: tool clamping piece, moveable anchor, front clip type jack, limiting plate are dismantled successively;
Nine, enter the circulation of next operation: the tool clamping piece under dismounting, moveable anchor, front clip type jack, limiting plate are put well successively, prepare to enter the circulation of next operation.
Clip type jack quick tensioning construction method before the present invention; Accessory installation work intermediate plate on front clip type jack and mounting limit plate are first arranged on steel strand respectively, and then front clip type jack, moveable anchor, tool clamping piece are installed successively, after all installing, quick tensioning is stretching by steel strand, then oil return pine, the moving back anchor fast and device therefor and workpiece disassembled, for next bridge is with preparing of moveable anchor.
This processing step also includes the installation that transition lengthens cover, and transition lengthens cover and is mainly used in the cave anchor of railway beam, and non-cave anchor can omit this part, and transition lengthens cover and can install in advance, namely installs before clip type jack before Installation of New Type.
The moveable anchor of this front clip type jack is that the 45# Steel material of being heat-treated by ionic nitriding Technology for Heating Processing is made, its compliance is extensive, all working anchor can be adapted to and easily move back anchor, when do not use any move back anchor agent just easily can move back anchor fast; Positioning sleeve and the gland of jack adopt bearing pin card slot type to be connected, and because positioning sleeve and gland adopt bearing pin card slot type to be connected, positioning sleeve easy accessibility, can quick despatch moveable anchor.Change moveable anchor specification convenient and swift, when moveable anchor changed by needs, only need by bearing pin and draw-in groove slightly gyration (being in detachable state) can positioning sleeve be taken out, then directly take out moveable anchor, change very quick.After changing moveable anchor, then bearing pin and draw-in groove are in clamped condition, the installation of moveable anchor can be completed, not only convenient but also quick, effectively improve operating efficiency.
The advantage of this construction method is mainly reflected in following several respects
1, front clip type jack quick tensioning construction: the placement of front clip type jack is contrary with rear cassette, and piston is near work anchor, and moveable anchor is contained in jack inside, when stretch-draw, piston is motionless, and cylinder part drives punching cover mobile, thus drives moveable anchor to move to carry out stretch-draw.Because the moveable anchor of novel front clip type jack is inner at jack, shorten its distance with work anchor, so the activity duration both having accelerated stretch-draw in turn saves steel strand (often end saving about 0.4 ~ 0.5m).
2, moveable anchor move back anchor technology fast: the moveable anchor of this front clip type jack is that the 45# Steel material of being heat-treated by ionic nitriding Technology for Heating Processing is made, its compliance is extensive, all working anchor can be adapted to and easily move back anchor, when do not use any move back anchor agent just easily can move back anchor fast.
3, the rapid-aligning lashing technology of moveable anchor: moveable anchor is inner by step power transmission at punching cover, and can arbitrarily rotate, and can not change its front and back position as being threaded, therefore very convenient with work anchor contraposition, be convenient to lashing.
4, moveable anchor quick loading, unloading, change technology: because positioning sleeve and gland adopt bearing pin card slot type to be connected, positioning sleeve easy accessibility, energy quick despatch moveable anchor.Change moveable anchor specification convenient and swift, when moveable anchor changed by needs, only need by bearing pin and draw-in groove slightly gyration (being in detachable state) can positioning sleeve be taken out, then directly take out moveable anchor, change very quick.After changing moveable anchor, then bearing pin and draw-in groove are in clamped condition, the installation of moveable anchor can be completed, not only convenient but also quick, effectively improve operating efficiency.
5, a difficult problem for stretch-draw insufficient space is overcome: during tensioning construction between the cast-in-situ box girder and prefabricated case beam of railway or bridges in highway engineering, between cast-in-situ box girder and cast-in-situ box girder (containing continuous girders by suspension grouting), because of stretch-draw insufficient space, traditional rear cassette generally only has 0.6 ~ 0.8m, and front cassette space is up to 1.8m, novel front clip type jack can overcome the shortcoming of stretch-draw insufficient space.
Front clip type jack quick tensioning construction method, combine the advantage of domestic various forward and backward clip type jack construction technology, construction method be simple and easy, safe, fast, efficient, environmental protection, energy-conservation, substantially increase production efficiency, save engineering cost, shorten the construction period.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, invention is further described:
Fig. 1 is the structural representation of the technological process of invention;
Fig. 2 is structure and the accessory figure of front clip type jack used in the technological process of invention.
In figure, 1. bonnet; 2. gland; 3. punching cover; 4. positioning sleeve; 5. piston; 6. cylinder body; 7. tool clamping piece; 8. work anchor ring; 9. moveable anchor; 10. protecgulum; 11. transition lengthen cover; 12 limiting plates; 13. work clip sheets.
Detailed description of the invention
It is below a kind of specific embodiment of invention.In this processing step, novel kilocalorie jack used is made up of bonnet 1, gland 2, punching cover 3, positioning sleeve 4, piston 5, cylinder body 6, tool clamping piece 7, moveable anchor 9 and protecgulum 10, accessory used comprises transition and lengthens cover 11, limiting plate 12, work clip sheet 13 and work anchor ring 8, wherein lengthens cover for apolegamy part.
It is as follows that this embodiment comprises processing step:
One, the fast blanking of steel strand, lashing
CSJ15-1A steel strand strand pulling machine is adopted by steel strand to carry out lashing and blanking to bridge.
Two, clip type jack accessory before Fast Installation
1. installation work intermediate plate 13: work clip sheet 13 is arranged on steel strand, steel strand are fastening;
2. mounting limit plate 12: by the limiting plate 12 matched with steel strand diameter, accurate contraposition is installed;
3. transition is installed and lengthens cover 11:
Three, clip type jack before installing
The stretch-draw oil circuit of oil pump connects front clip type jack stretch-draw chamber oil nozzle, stretch-draw oil circuit also received by calibrated pressure meter simultaneously, oil pump backhaul oil circuit connects the backhaul oil nozzle of front clip type jack, and the safety valve of stretch-draw oil circuit is adjusted to 10MPa, then before utilizing the hoisting frame be fixed on prefabricated case beam to promote, clip type jack is to stretching notch, and rapid-aligning is installed;
Four, fast fixing tool anchor 9
By bearing pin and draw-in groove slightly gyration make it be in can connection status, the installation of moveable anchor 9 can be completed;
Five, erecting tools intermediate plate 7
Ready tool clamping piece 7 will be shifted to an earlier date fastened in place will be installed.
Six, quick tensioning: open switch, stretch-draw oil circuit fuel feeding hydraulic oil is filled with stretch-draw oil pocket, promotion cylinder body advance and cylinder body outwards move, and the hydraulic oil of the oil circuit of backhaul is simultaneously flowed in the fuel tank of oil pump by backhaul oil circuit, and backhaul oil circuit now must be open mode;
Seven, oil return pine: open oil return switch backhaul oil circuit fuel feeding, the oil return of stretch-draw oil circuit, hydraulic oil is filled with backhaul oil pocket, promotes cylinder body and retreats retraction, the hydraulic oil of the oil circuit of backhaul is simultaneously flowed in the fuel tank of oil pump by stretch-draw oil circuit, and stretch-draw oil circuit now must be open mode;
Eight, moveable anchor move back anchor, dismounting fast: tool clamping piece 7, moveable anchor 9, front clip type jack, limiting plate 12 are dismantled successively;
Nine, enter the circulation of next operation: the tool clamping piece 7 under dismounting, moveable anchor 9, front clip type jack, limiting plate 12 are dismantled successively and put well successively, prepare to enter the circulation of next operation.
Mark deep and clear river grand bridge for large western special line for passenger trains III and lead to bridge (2008) 2322A series 31.5m and 23.5m case beam 582 Pin, now 450 Pin are produced, every Pin prefabricated case beam has 27 prestressed stretch-draw ducts, the often end in each duct is saved steel strand length and is considered according to 0.4m, cost-saved 63.375 ten thousand yuan altogether.
Save the quantity of steel strand: G=(+1 hole × 12 piece, 26 hole × 9) × 0.8m × 1.101/1000 × 450 Pin=97.5t (steel strand)
The cost of saving: 97.5t × 6500 yuan/t=63.375 ten thousand yuan.
Claims (5)
1. a clip type jack quick tensioning construction method before, strained by the steel strand of beam inside by jack, its processing step is as follows:
One, the fast blanking of steel strand, lashing: adopted by steel strand CSJ15-1A steel strand strand pulling machine to carry out lashing and blanking to bridge;
Two, clip type jack accessory before Fast Installation
1. installation work intermediate plate (13): work clip sheet (13) is arranged on steel strand, steel strand are fastening;
2. mounting limit plate (12): limiting plate (12) accurate contraposition matched with steel strand diameter is installed;
Three, clip type jack before installing: the stretch-draw oil circuit of oil pump connects front clip type jack stretch-draw chamber oil nozzle, the stretch-draw oil circuit of front clip type jack also received by calibrated pressure meter simultaneously, oil pump backhaul oil circuit connects the backhaul oil nozzle of front clip type jack, and the safety valve of the stretch-draw oil circuit of front clip type jack is adjusted to 10MPa, then before utilizing the hoisting frame be fixed on prefabricated case beam to promote, clip type jack is to stretching notch, and rapid-aligning is installed;
Four, fast fixing tool anchor (9): bearing pin and draw-in groove are turned an angle, bearing pin and draw-in groove are in can connection status, can complete the installation of moveable anchor (9);
Five, erecting tools intermediate plate: ready tool clamping piece will be shifted to an earlier date and install fastened in place;
Six, quick tensioning: open switch, stretch-draw oil circuit fuel feeding hydraulic oil is filled with stretch-draw oil pocket, promotion cylinder body advance and cylinder body outwards move, and the hydraulic oil of the oil circuit of backhaul is simultaneously flowed in the fuel tank of oil pump by backhaul oil circuit, and backhaul oil circuit now must be open mode;
Seven, oil return pine: open oil return switch, backhaul oil circuit fuel feeding, the oil return of stretch-draw oil circuit, hydraulic oil is filled with backhaul oil pocket, promote cylinder body and retreat retraction, the hydraulic oil of the oil circuit of backhaul is simultaneously flowed in the fuel tank of oil pump by stretch-draw oil circuit, and stretch-draw oil circuit now must be open mode;
Eight, moveable anchor move back anchor, dismounting fast: tool clamping piece (7), moveable anchor (9), front clip type jack, limiting plate (12) are dismantled successively;
Nine, enter the circulation of next operation: the tool clamping piece (7) under dismounting, moveable anchor (9), front clip type jack, limiting plate (12) are put well successively, prepare to enter the circulation of next operation.
2. front clip type jack quick tensioning construction method according to claim 1, when its processing step is also included in clip type jack accessory before Fast Installation, installs transition and lengthens cover (11) after mounting limit plate.
3. front clip type jack quick tensioning construction method according to claim 1, in its processing step, used tool anchor is that the 45# Steel material of being heat-treated by ionic nitriding Technology for Heating Processing is made.
4. front clip type jack quick tensioning construction method according to claim 1, in its processing step, the positioning sleeve (4) of jack used adopts bearing pin card slot type to be connected with gland (2).
5. front clip type jack quick tensioning construction method according to claim 1, in its processing step, kilocalorie jack used is made up of bonnet (1), gland (2), punching cover (3), positioning sleeve (4), piston (5), cylinder body (6), tool clamping piece (7), moveable anchor (9) and protecgulum (10), and accessory used comprises transition and lengthens cover (11), limiting plate (12), work clip sheet (13), work anchor ring (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110253279.0A CN102953549B (en) | 2011-08-30 | 2011-08-30 | Novel quick tensioning construction method for front-blocked jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110253279.0A CN102953549B (en) | 2011-08-30 | 2011-08-30 | Novel quick tensioning construction method for front-blocked jack |
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| Publication Number | Publication Date |
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| CN102953549A CN102953549A (en) | 2013-03-06 |
| CN102953549B true CN102953549B (en) | 2015-03-18 |
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| CN201110253279.0A Expired - Fee Related CN102953549B (en) | 2011-08-30 | 2011-08-30 | Novel quick tensioning construction method for front-blocked jack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108103946A (en) * | 2017-12-21 | 2018-06-01 | 中国十九冶集团有限公司 | Tensioning device applied to small space construction |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225403B (en) * | 2013-05-10 | 2015-07-15 | 史东生 | Method for installing elastic supporting and lifting devices by adopting prestressing technique |
| CN105422131B (en) * | 2015-12-28 | 2018-07-06 | 上海市机械施工集团有限公司 | The device and its application method longitudinally tensed for shield duct piece |
| CN106809759A (en) * | 2017-03-02 | 2017-06-09 | 湖南联智智能科技有限公司 | A kind of preceding clip type jack from dynamometry value |
| CN117486114B (en) * | 2024-01-03 | 2024-03-05 | 河南丽卡数控设备有限公司 | Multi-hole front clamping jack |
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| JPH09217493A (en) * | 1996-02-14 | 1997-08-19 | Abe Kogyosho:Kk | Device for automatic tension system for pc structure |
| CN2460241Y (en) * | 2000-11-13 | 2001-11-21 | 柳州欧维姆建筑机械有限公司 | Jack for single prestressed reinforcing steel stretch-draw |
| CN101397851A (en) * | 2008-10-24 | 2009-04-01 | 上海建科建设发展有限公司 | Construction regulation means of prestressing force steel construction stretching end cable force |
| CN201635028U (en) * | 2009-09-11 | 2010-11-17 | 李树颜 | Retrogradation restricting device for one-way road |
| CN102003072A (en) * | 2010-10-08 | 2011-04-06 | 天津滨海盈信投资有限公司 | Steel strand bundle-weaving and crossing construction method |
-
2011
- 2011-08-30 CN CN201110253279.0A patent/CN102953549B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09217493A (en) * | 1996-02-14 | 1997-08-19 | Abe Kogyosho:Kk | Device for automatic tension system for pc structure |
| CN2460241Y (en) * | 2000-11-13 | 2001-11-21 | 柳州欧维姆建筑机械有限公司 | Jack for single prestressed reinforcing steel stretch-draw |
| CN101397851A (en) * | 2008-10-24 | 2009-04-01 | 上海建科建设发展有限公司 | Construction regulation means of prestressing force steel construction stretching end cable force |
| CN201635028U (en) * | 2009-09-11 | 2010-11-17 | 李树颜 | Retrogradation restricting device for one-way road |
| CN102003072A (en) * | 2010-10-08 | 2011-04-06 | 天津滨海盈信投资有限公司 | Steel strand bundle-weaving and crossing construction method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108103946A (en) * | 2017-12-21 | 2018-06-01 | 中国十九冶集团有限公司 | Tensioning device applied to small space construction |
| CN108103946B (en) * | 2017-12-21 | 2019-04-16 | 中国十九冶集团有限公司 | Tensioning device applied to small space construction |
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| CN102953549A (en) | 2013-03-06 |
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Effective date of registration: 20161017 Address after: 210023, A6 building, Purple East International Creative garden, No. 2 Purple East Road, Qixia District, Jiangsu, Nanjing Patentee after: China Railway Tenth Bureau Group Fourth Engineering Co.,Ltd. Address before: 250101 Shandong city in Ji'nan Province, Lixia District (the New District) Shun Tai Plaza No. 7 Patentee before: China Railway Tenth Group Co.,Ltd. |
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Granted publication date: 20150318 |