CN105463994A - Prestress tensioning jack movement device and prestress box girder structure tensioning method - Google Patents
Prestress tensioning jack movement device and prestress box girder structure tensioning method Download PDFInfo
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- CN105463994A CN105463994A CN201510979504.7A CN201510979504A CN105463994A CN 105463994 A CN105463994 A CN 105463994A CN 201510979504 A CN201510979504 A CN 201510979504A CN 105463994 A CN105463994 A CN 105463994A
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- counter
- jib
- jack
- draw
- box girder
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a prestress tensioning jack movement device and a prestress box girder structure tensioning method. The prestress tensioning jack movement device comprises movable stabilization frames, a balance arm, a hand-drive block connecting device and a counterweight device, wherein the balance arm is erected on the two movable stabilization frames to form a cantilever structure; the counterweight device is arranged on the balance arm between the two movable stabilization frames; the hand-drive block connecting device is arranged at the extending end of the balance arm and composed of a pulley, a hand-drive block and a steel wire rope; the pulley is fixed to the balance arm through a connecting ring buckle; the hand-drive block is connected with the connecting ring buckle on the upper portion and the steel wire rope on the lower portion through buckles; the steel wire rope is used for hoisting a jack; the balance arm, the hand-drive block connecting device and the counterweight device can move along with the movable stabilization frames. By means of the prestress tensioning jack movement device and the prestress box girder structure tensioning method, the jack can be moved conveniently and rapidly, so that the efficiency and safety of tensioning work of a cast-in-place box girder are improved, and the labor intensity of construction workers is greatly relieved.
Description
Technical field
The present invention relates to highway and Urban Bridge engineering post-tensioned prestressed box beam structure tension technology field, particularly relate to a kind of prestressed stretch-draw jack mobile device and pre-stressed box girder construction method for stretching.
Background technology
Current bridge engineering many employings prestressed box girder structure, prestress engineering is as the pith in construction of cast-in-situ box-beam, from the installation of the laying of reserving hole channel, anchor plate, concrete below anchor vibrate and stretch-draw and mud jacking operate each step and can not be ignored, once a certain link goes wrong, serious quality problems will be caused.Because Bridge Steel beam ratio is more in present stage construction, stretch-draw has permanent order again, needs repeatedly the operation of jack for moving ability, and the every platform of jack heavily about 200KG, need to move up and down at beam-ends, depending merely on manpower not only wastes time and energy, and poor stability.In addition, in cast-in-situ box girder stretching construction, inaccurate, the unstable problem in current ubiquity bellows location, bellows easily movement in steel strand and slip casting process, thus affect stretch-draw effect and finally cause workmanship to decline.
Summary of the invention
The invention provides a kind of prestressed stretch-draw jack mobile device, can jack for moving quickly and easily, thus improve efficiency and the safety of cast-in-situ box girder stretch-draw operation, and greatly reduce the labour intensity of constructor; Present invention also offers a kind of pre-stressed box girder construction method for stretching based on prestressed stretch-draw jack mobile device, to adopt along bellows total length interval fixing method simultaneously, to guarantee in stretch-draw and subsequent construction process that bellows position accurately and can not be shifted.
In order to achieve the above object, the present invention realizes by the following technical solutions:
Prestressed stretch-draw jack mobile device, comprise mobile stabilizing bracket, counter-jib, bottle gouard moved by hands linkage and counter weight device, described counter-jib is erected on 2 mobile stabilizing brackets and forms cantilever beam structures, counter-jib between 2 mobile stabilizing brackets arranges counter weight device, and counter-jib external part is provided with bottle gouard moved by hands linkage; Bottle gouard moved by hands linkage is made up of pulley, bottle gouard moved by hands and wire rope, and pulley is fixed on counter-jib by connecting latch closure, and bottle gouard moved by hands is connected with the connection latch closure on top and the wire rope of bottom respectively by snap close, and wire rope is for lifting jack; Counter-jib, bottle gouard moved by hands linkage and counter weight device can move with mobile stabilizing bracket.
Described mobile stabilizing bracket forms by erecting strut, upper strata needling, lower floor's needling and strap brake universal wheel, and upper strata needling, lower floor's needling and 4 perpendicular struts form tower structure, and 4 strap brake universal wheels are arranged on bottom perpendicular strut respectively; Counter-jib is fixed on lower floor's needling.
Described counter-jib top is longitudinally provided with slideway, and counter-jib is provided with positive stop in the outside of bottle gouard moved by hands linkage installation site, is also provided with positive stop in the both sides of counter weight device.
Described counter weight device is made up of balancing weight, bearing bar and lifting rope, and balancing weight is hung on counter-jib by bearing bar; Uniform 4 suspension ring in corner, top of balancing weight, 2 bearing bars are arranged perpendicular to counter-jib direction respectively, and each bearing bar connects 2 suspension ring of homonymy respectively by lifting rope.
Based on the method for stretching of prestressed stretch-draw jack mobile device, comprise the steps:
1) under prestressed in-situ depositing box girder web reinforcing bar and anchor after reinforcement installation, longitudinally mark by 50cm spacing along cast-in-situ box girder, positioning bar is welded on the reinforcing bar of cast-in-situ box girder web both sides by mark position, bellows is installed, to be locked fixing bellows by U-shaped locating ring successively in mark, then U-shaped locating ring to be fixed by steel wire and positioning bar colligation; Guarantee that bellows position is accurate, fixation, and bellows is not shifted in steel strand and slip casting process;
2) 2 mobile stabilizing brackets in prestressed stretch-draw jack mobile device are longitudinally fixed to first middle stretching end along cast-in-situ box girder, counter-jib is installed, counter weight device is fixed on the counter-jib between 2 mobile stabilizing brackets, and bottle gouard moved by hands linkage is arranged on the counter-jib external part of stretching end side; Wire rope manually below cucurbit is sling jack, after the whole installation of whole prestressed stretch-draw jack mobile device, first jack is placed on cast-in-situ box girder end face; After the work anchor of end to be tensioned and intermediate plate installation, then jack is placed into the position of stretching end, by the position of pulley adjustment jack, after steel bundle, installation work anchor and intermediate plate on jack, carry out stretch-draw operation;
3), after first stretching end stretch-draw operation completes, prestressed stretch-draw jack mobile device is moved integrally next stretching end; Order that is first up and then down according to cast-in-situ box girder cross section, first intermediate and then both sides carries out stretch-draw operation to stretching end one by one, until all stretch-draw completes.
Compared with prior art, the invention has the beneficial effects as follows:
1) realize jack by prestressed stretch-draw jack mobile device and move to stretch-draw position quickly and easily, utilize bottle gouard moved by hands manually to lift by crane, and the model of bottle gouard moved by hands can be selected according to the weight of jack, simple structure, easy to adjust;
2) prestressed stretch-draw jack mobile device have employed the mobile stabilizing bracket that bottom is provided with strap brake universal wheel, Stability Analysis of Structures, and conveniently moving, can ensure the accuracy of jack tension position;
3) adopt the method fixing along bellows total length interval, to guarantee in stretch-draw and subsequent construction process that bellows position accurately and can not be shifted.
Accompanying drawing explanation
Fig. 1 is prestressed stretch-draw jack mobile device structural representation of the present invention.
Fig. 2 is the structural representation of mobile stabilizing bracket of the present invention.
Fig. 3 is the annexation schematic diagram of counter-jib of the present invention and mobile stabilizing bracket.
Fig. 4 is the structural representation of bottle gouard moved by hands linkage of the present invention.
Fig. 5 is bottle gouard moved by hands linkage of the present invention and counter-jib annexation schematic diagram.
Fig. 6 is the structural representation of counter weight device of the present invention.
Fig. 7 is bellows positioning bar arrangement diagram of the present invention.
Fig. 8 is bellows of the present invention and positioning bar annexation schematic diagram.
Fig. 9 is the case joist steel twisted wire stretching end ground tackle arrangement diagram in the embodiment of the present invention.
In figure: 1. cast-in-situ box girder 2. moves stabilizing bracket 21. and erects strut 22. upper strata needling 23. lower floor needling 24. strap brake universal wheel 3. counter-jib 31. positive stop 4. bottle gouard moved by hands linkage 41. pulley 42. and connect latch closure 43. snap close 44. bottle gouard moved by hands 45. wire rope 5. counter weight device 51. balancing weight 52. bearing bar 53. suspension ring 54. lifting rope 6. steel wire 7. jack 8. bellows 9.U type locating ring 10. positioning bar 11. casees beam steels 12. stretching end 13. work anchor
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
Seeing Fig. 1-Fig. 6, is the structural representation of prestressed stretch-draw jack mobile device of the present invention.Prestressed stretch-draw jack mobile device of the present invention, comprise mobile stabilizing bracket 2, counter-jib 3, bottle gouard moved by hands linkage 4 and counter weight device 5, described counter-jib 4 is erected on 2 mobile stabilizing brackets 3 and forms cantilever beam structures, counter-jib 3 between 2 mobile stabilizing brackets 2 arranges counter weight device 5, and counter-jib 3 external part is provided with bottle gouard moved by hands linkage 4; Bottle gouard moved by hands linkage 4 is made up of pulley 41, bottle gouard moved by hands 44 and wire rope 45, pulley 41 is fixed on counter-jib 3 by connecting latch closure 42, bottle gouard moved by hands 44 is connected with the connection latch closure 42 on top and the wire rope 45 of bottom respectively by snap close 43, and wire rope 45 is for lifting jack 7; Counter-jib 3, bottle gouard moved by hands linkage 4 and counter weight device 5 can move with mobile stabilizing bracket 2.
Described mobile stabilizing bracket 2 is made up of perpendicular strut 21, upper strata needling 22, lower floor's needling 23 and strap brake universal wheel 24, upper strata needling 22, lower floor's needling 23 and 4 perpendicular struts 22 form tower structure, and 4 strap brake universal wheels 24 are arranged on bottom perpendicular strut 21 respectively; Counter-jib 3 is fixed on lower floor's needling 23.
Described counter-jib 3 top is longitudinally provided with slideway, and counter-jib 3 is provided with positive stop 31 in the outside of bottle gouard moved by hands linkage 4 installation site, is also provided with positive stop 31 in the both sides of counter weight device 5.
Described counter weight device 5 is made up of balancing weight 51, bearing bar 52 and lifting rope 54, and balancing weight 51 is hung on counter-jib 3 by bearing bar 52; Uniform 4 suspension ring in corner, top 53,2 bearing bars 52 of balancing weight 51 are arranged perpendicular to counter-jib 3 direction respectively, and each bearing bar 52 connects 2 suspension ring 53 of homonymy respectively by lifting rope 54.
Based on the method for stretching of prestressed stretch-draw jack mobile device, comprise the steps:
1) under prestressed in-situ depositing box girder web reinforcing bar and anchor after reinforcement installation, longitudinally mark by 50cm spacing along cast-in-situ box girder 1, positioning bar 10 is welded on cast-in-situ box girder web both sides reinforcing bar 11 by mark position, bellows 8 is installed, to be locked fixing bellows 8 by U-shaped locating ring 9 successively in mark, then U-shaped locating ring 9 to be fixed by steel wire and positioning bar 10 colligation; Guarantee that bellows 8 position is accurate, fixation, and bellows 8 is not shifted in steel strand and slip casting process;
2) mobile for 2 in prestressed stretch-draw jack mobile device stabilizing bracket 2 is longitudinally fixed to first middle stretching end 12 along cast-in-situ box girder 1, counter-jib 3 is installed, counter weight device 5 is fixed on the counter-jib 3 between 2 mobile stabilizing brackets 2, and bottle gouard moved by hands linkage 4 is arranged on counter-jib 3 external part of stretching end 12 side; Wire rope 45 manually below cucurbit 44 is sling jack 7, after the whole installation of whole prestressed stretch-draw jack mobile device, first jack 7 is placed on cast-in-situ box girder 1 end face; After the work anchor 13 of end 12 to be tensioned and intermediate plate installation, then jack 7 is placed into the position of stretching end 12, adjusted the position of jack 7 by pulley 41, after steel bundle, installation work anchor 13 and intermediate plate on jack 7, carry out stretch-draw operation;
3), after first stretching end stretch-draw operation completes, prestressed stretch-draw jack mobile device is moved integrally next stretching end; Order that is first up and then down according to cast-in-situ box girder 1 cross section, first intermediate and then both sides carries out stretch-draw operation to stretching end 12 one by one, until all stretch-draw completes.
Following examples are implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention are not limited to following embodiment.In following embodiment, method therefor is conventional method if no special instructions.
[embodiment]
In the present embodiment, the upper strata needling 22 of mobile stabilizing bracket 2, with between perpendicular strut 21, all adopt fastener to be connected between lower floor's needling 23 with perpendicular strut 21, forms stable frame construction, and realizes moving freely by 4 strap brake universal wheels 24 of bottom; (as shown in Figure 2)
Counter-jib 3 is made by i iron, and counter-jib 3 is arranged on lower floor's needling 23 of 2 mobile stabilizing brackets 2, and firm with steel wire lashing; Positive stop 31, by waste and old band steel or reinforcement fabrication, is welded on relevant position on counter-jib 3.(as shown in Figure 3)
The pulley 41 of bottle gouard moved by hands linkage 4 is arranged in counter-jib 4 top slide, and be connected the bottle gouard moved by hands 44 of below with snap close 43 by connection latch closure 42, bottle gouard moved by hands 44 guide chain one end is provided with snap close 43, is sling by jack 7 by wire rope 45.(as shown in Figure 5)
2 bearing bars 52 of counter weight device 5 are placed on the counter-jib 3 between 2 mobile stabilizing brackets 2, and both sides respectively arrange 1 positive stop 31, prevent balancing weight 51 position from departing from.Bearing block 51 is established 4 suspension ring 53, catch on suspension ring 53 by the suspension hook on lifting rope 54 below bearing bar 52, being sling by balancing weight 51 is suspended on counter-jib 3.Bearing bar 52 is made by angle steel, and positive stop 31 is herein made by steel plate or angle steel.(as shown in Figure 6)
Positioning bar 10 and U-shaped locating ring 9 are longitudinally arranged along bellows 8, and spacing is 50cm.Positioning bar 10 is welded on the case beam steel 11 that bellows 8 closes on, and U-shaped locating ring 9 is fixed by steel wire and positioning bar 10.The position of bellows 8 accurately can be fixed by positioning bar 10 and U-shaped locating ring 9.(as shown in Figs. 7-8)
As shown in Figure 9, in the present embodiment, cast-in-situ box girder 1 cross section is established altogether 4 row's stretching ends 12, the location designation of each stretching end 12 as shown in the figure, during stretch-draw, by the namely first up and then down order of F1-F2-F3-F4, and first row presses F1c-F1b-F1a-F1 order stretch-draw, second row presses the order stretch-draw of F2c-F2b-F2a-F2, by that analogy.
The above; be only the present invention's preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (5)
1. prestressed stretch-draw jack mobile device, it is characterized in that, comprise mobile stabilizing bracket, counter-jib, bottle gouard moved by hands linkage and counter weight device, described counter-jib is erected on 2 mobile stabilizing brackets and forms cantilever beam structures, counter-jib between 2 mobile stabilizing brackets arranges counter weight device, and counter-jib external part is provided with bottle gouard moved by hands linkage; Bottle gouard moved by hands linkage is made up of pulley, bottle gouard moved by hands and wire rope, and pulley is fixed on counter-jib by connecting latch closure, and bottle gouard moved by hands is connected with the connection latch closure on top and the wire rope of bottom respectively by snap close, and wire rope is for lifting jack; Counter-jib, bottle gouard moved by hands linkage and counter weight device can move with mobile stabilizing bracket.
2. prestressed stretch-draw jack mobile device according to claim 1, it is characterized in that, described mobile stabilizing bracket forms by erecting strut, upper strata needling, lower floor's needling and strap brake universal wheel, upper strata needling, lower floor's needling and 4 perpendicular struts form tower structure, and 4 strap brake universal wheels are arranged on bottom perpendicular strut respectively; Counter-jib is fixed on lower floor's needling.
3. prestressed stretch-draw jack mobile device according to claim 1, it is characterized in that, described counter-jib top is longitudinally provided with slideway, and counter-jib is provided with positive stop in the outside of bottle gouard moved by hands linkage installation site, is also provided with positive stop in the both sides of counter weight device.
4. prestressed stretch-draw jack mobile device according to claim 1, it is characterized in that, described counter weight device is made up of balancing weight, bearing bar and lifting rope, and balancing weight is hung on counter-jib by bearing bar; Uniform 4 suspension ring in corner, top of balancing weight, 2 bearing bars are arranged perpendicular to counter-jib direction respectively, and each bearing bar connects 2 suspension ring of homonymy respectively by lifting rope.
5., based on the method for stretching of prestressed stretch-draw jack mobile device according to claim 1, it is characterized in that, comprise the steps:
1) under prestressed in-situ depositing box girder web reinforcing bar and anchor after reinforcement installation, longitudinally mark by 50cm spacing along cast-in-situ box girder, positioning bar is welded on the reinforcing bar of cast-in-situ box girder web both sides by mark position, bellows is installed, to be locked fixing bellows by U-shaped locating ring successively in mark, then U-shaped locating ring to be fixed by steel wire and positioning bar colligation; Guarantee that bellows position is accurate, fixation, and bellows is not shifted in steel strand and slip casting process;
2) 2 mobile stabilizing brackets in prestressed stretch-draw jack mobile device are longitudinally fixed to first middle stretching end along cast-in-situ box girder, counter-jib is installed, counter weight device is fixed on the counter-jib between 2 mobile stabilizing brackets, and bottle gouard moved by hands linkage is arranged on the counter-jib external part of stretching end side; Wire rope manually below cucurbit is sling jack, after the whole installation of whole prestressed stretch-draw jack mobile device, first jack is placed on cast-in-situ box girder end face; After the work anchor of end to be tensioned and intermediate plate installation, then jack is placed into the position of stretching end, by the position of pulley adjustment jack, after steel bundle, installation work anchor and intermediate plate on jack, carry out stretch-draw operation;
3), after first stretching end stretch-draw operation completes, prestressed stretch-draw jack mobile device is moved integrally next stretching end; Order that is first up and then down according to cast-in-situ box girder cross section, first intermediate and then both sides carries out stretch-draw operation to stretching end one by one, until all stretch-draw completes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510979504.7A CN105463994B (en) | 2015-12-23 | 2015-12-23 | Prestress tensioning jack movement device and prestress box girder structure tensioning method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510979504.7A CN105463994B (en) | 2015-12-23 | 2015-12-23 | Prestress tensioning jack movement device and prestress box girder structure tensioning method |
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| CN105463994A true CN105463994A (en) | 2016-04-06 |
| CN105463994B CN105463994B (en) | 2017-05-17 |
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| CN201510979504.7A Active CN105463994B (en) | 2015-12-23 | 2015-12-23 | Prestress tensioning jack movement device and prestress box girder structure tensioning method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107237264A (en) * | 2017-06-15 | 2017-10-10 | 中铁十四局集团有限公司 | A kind of the second stage of prestress wire tensioning support of Precast T-Beam and method |
| CN111764285A (en) * | 2020-06-08 | 2020-10-13 | 浙江交工集团股份有限公司 | Cap beam stirrup positioning device and positioning method thereof |
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| CN203855898U (en) * | 2014-05-29 | 2014-10-01 | 武汉一冶建筑安装工程有限责任公司 | Assembled installing lifting tool for overload box girder and crossbeam tensioning jack |
| CN205276132U (en) * | 2015-12-23 | 2016-06-01 | 中国三冶集团有限公司 | Prestressing force stressing jack mobile device |
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| JPH041310B2 (en) * | 1980-09-30 | 1992-01-10 | Tokyo Shibaura Electric Co | |
| JPH041310A (en) * | 1990-04-18 | 1992-01-06 | Taisei Corp | Installation of pc cable tension jack |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107237264A (en) * | 2017-06-15 | 2017-10-10 | 中铁十四局集团有限公司 | A kind of the second stage of prestress wire tensioning support of Precast T-Beam and method |
| CN107237264B (en) * | 2017-06-15 | 2019-12-27 | 中铁十四局集团有限公司 | Prefabricated T-beam secondary-stage prestress steel strand tensioning support and method |
| CN111764285A (en) * | 2020-06-08 | 2020-10-13 | 浙江交工集团股份有限公司 | Cap beam stirrup positioning device and positioning method thereof |
| CN111764285B (en) * | 2020-06-08 | 2022-08-12 | 浙江交工集团股份有限公司 | Cap beam stirrup positioning device and positioning method thereof |
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|---|---|
| CN105463994B (en) | 2017-05-17 |
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