CN103255718B - Pre-tensioning method plate-beam track movable type steel transverse beam integer tensioning device and tensioning technology - Google Patents
Pre-tensioning method plate-beam track movable type steel transverse beam integer tensioning device and tensioning technology Download PDFInfo
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- CN103255718B CN103255718B CN201310158889.1A CN201310158889A CN103255718B CN 103255718 B CN103255718 B CN 103255718B CN 201310158889 A CN201310158889 A CN 201310158889A CN 103255718 B CN103255718 B CN 103255718B
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- 230000008569 process Effects 0.000 claims description 4
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Abstract
The invention relates to a pre-tensioning method plate-beam track movable type steel transverse beam integer tensioning device and a tensioning technology. The pre-tensioning method plate-beam rail movable type steel transverse beam integer tensioning device comprises a tensioning end fixing steel transverse beam, an anchoring end fixing steel transverse beam, steel strands, beam restraining table bases arranged between the tensioning end fix fixing steel transverse beam and the anchoring end fixing steel transverse beam, a force transmission column arranged on one side of each beam restraining table base, a track movable type platform arranged on one side of the tensioning end fix fixing steel transverse beam and up-and down adjusting steel plates, wherein the up-and-down steel plates are connected on the tensioning end fixing steel transverse beam, the anchoring end fixing steel transverse beam and a lifting jack moving transverse beam in a buckling mode, and each steel strand is provided with two dual-connecting elements, a single connecting element and three sections of precision rolling twisted steel bars. The pre-tensioning method plate-beam track movable type steel transverse beam integer tensioning device is further provided with a pre-tensioning plate lifting device. The pre-tensioning method plate-beam track movable type steel transverse beam integer tensioning device can conduct construction on multiple beams simultaneously, saves materials, is safe, reliable, capable of being used in multiple times, suitable for construction of all bridge types, simple in operation, continuous in construction and suitable for construction of all beam-plate types, and improves effects. The pre-tensioning plate lifting device is capable of rotating at 360 degrees, storage of movable beams is convenient, occupation of a crane is reduced, and efficiency is improved.
Description
Technical field
The present invention relates to a kind of pre-tensioning system hollow slab beam tensioning equipment of bridge construction technical field of mechanical equipment, particularly relate to a kind of Pretensioned Plate Beam orbit movable gooseneck integral tension device and construction technology thereof.
Background technology
The equipment of monolithic single tendon stretch is generally adopted in traditional pre-tensioning system constructing hollow slab beam, as shown in Figure 1, the equipment of this monolithic single tendon stretch fixes gooseneck 3 by stretching end, anchored end fixes gooseneck 4, beam making bench 2, ground tackle 12, jack 5-1, steel strand 7 form, wherein, fix gooseneck 3 and anchored end at stretching end to fix between gooseneck 4 and be provided with beam making bench 2, fix gooseneck 3 and anchored end at stretching end to fix gooseneck 4 liang of lateral surfaces and be provided with ground tackle 12, the ground tackle 12 that steel strand 7 fix gooseneck 3 from stretching end extends through the ground tackle that anchored end fixes gooseneck 4 always, jack 5-1 withstands on stretching end and fixes on the ground tackle of gooseneck 3.Utilize the shortcoming of the equipment of monolithic single tendon stretch as follows:
1. stretch-draw overlong time.And in stretching process, other operation can not be constructed, and constrains the production capacity of Liang Chang, affects construction speed;
2., during steel wire, need consider that every sheet girder tensioning end fixes the length of the steel strand between gooseneck to pedestal, this part steel strand is wasted very much, adds cost;
3. owing to adopting monolithic single tendon stretch, the sequencing difference of every root steel strand tension, the precision of oil pressure gauge, the human error of operating personnel all can cause steel strand discontinuity;
4. owing to adopting ground tackle anchoring, in use procedure, the end face of intermediate plate is likely not concordant, accident, the poor stability such as easily cause steel strand stripped thread time stressed, intermediate plate flies out.
In view of the defect that the equipment of above-mentioned existing monolithic single tendon stretch exists, the present inventor's actively in addition research and innovation, to founding a kind of Pretensioned Plate Beam orbit movable gooseneck integral tension equipment of new structure, the equipment of general existing monolithic single tendon stretch can be improved, make it have more practicality.
Summary of the invention
Main purpose of the present invention is, the defect that the equipment overcoming existing monolithic single tendon stretch exists, and a kind of Pretensioned Plate Beam orbit movable gooseneck integral tension device of new structure is provided, simultaneously technical problem to be solved to construct by multi-disc beam, save material, safe and reliable, thus be more suitable for practicality, and there is the value in industry.
Another object of the present invention is to, provide a kind of Pretensioned Plate Beam orbit movable gooseneck integral tension device, technical problem to be solved repeatedly to use, and can adapt to the construction of various bridge type, thus more be suitable for practicality.
Another object of the present invention is, there is provided a kind of construction technology of Pretensioned Plate Beam orbit movable gooseneck integral tension device, technical problem to be solved makes its constructing operation easy, energy sequential production, and the construction of various beam slab model can be adapted to, thus improve effect.
An also object of the present invention is, provides a kind of Pretensioned Plate Beam orbit movable gooseneck integral tension device, and technical problem to be solved makes the 360 degree of rotations of its pre-tensioned plate lifting appliance energy, conveniently move beam to deposit, reduce loop wheel machine to take, increase work efficiency, thus be more suitable for practicality.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of Pretensioned Plate Beam orbit movable gooseneck integral tension device that the present invention proposes, comprise stretching end to fix gooseneck and anchored end and fix gooseneck, steel strand and be arranged on stretching end and fix gooseneck and anchored end and fix beam making bench between gooseneck, and be arranged on the force-transmitting pole of each beam making bench both sides, it also comprises:
---orbit movable platform, by 2 jack, jack moving beam, vertically move track, transverse shifting track, coagulation earthen platform, 4 the first pulleys, plate platform, the first channel-section steel, 2 oil pumps, the second channel-section steel, 4 the second pulleys, bracing frame, wherein
Fix gooseneck side at stretching end and one hole groove is set, in the bottom transverse of this hole groove, two row's coagulation earthen platforms are set, two transverse shifting tracks are separately positioned on above this two rows coagulation earthen platform, the first channel-section steel is provided with on these two transverse shifting tracks, 4 first pulleys that laterally can slide on two transverse shifting tracks are set at the bottom surface of this first channel-section steel, make this orbit movable stretch-draw platform by two the transverse shifting tracks of these 4 first pulleys on coagulation earthen platform laterally slide; Plate platform is provided with on this first channel-section steel, on this plate platform, be provided with two vertically move track, vertically move above track be provided with the second channel-section steel at this, 4 second pulleys that can vertically move longitudinal sliding motion on track at two are set at the bottom surface of this second channel-section steel, make this orbit movable stretch-draw platform vertically move longitudinal sliding motion on track by this plate platform two of these 4 second pulleys; On this second channel-section steel, jack moving beam is set, these two jack are separately fixed at this jack moving beam side and are supported by the bracing frame be fixed on the second channel-section steel, vertically moved by orbit movable stretch-draw platform, two jack are abutted against stretching end to be fixed on gooseneck outer face, two described oil pumps are steadily arranged on above jack moving beam, each oil pump is connected by hydraulic tube with corresponding jack, and the middle part of described jack moving beam is provided with the first rectangular opening of longitudinally this jack moving beam through;
---described stretching end fixes gooseneck, for rectangle steel case, fix in the middle part of gooseneck at this stretching end and be provided with the second rectangular opening that longitudinal through stretching end fixes gooseneck, it is rectangle steel case that described anchored end fixes gooseneck, fixes in the middle part of gooseneck being provided with the 3rd rectangular opening that longitudinal this anchored end through fixes gooseneck in this anchored end;
---up-down adjustment steel plate, be provided with the up-down adjustment steel plate adapting to multiple beam slab model, wherein the up-down adjustment steel plate of each beam slab model is provided with 3 blocks of up-down adjustment steel plates, i.e. the first up-down adjustment steel plate, second up-down adjustment steel plate, 3rd up-down adjustment steel plate, the first rectangular opening place in the middle part of described jack moving beam, described stretching end is fixed each beam making bench position corresponding, the 3rd rectangular opening place that the second rectangular opening place at the middle part of gooseneck and described anchored end fix in the middle part of gooseneck and is respectively equipped with the first up-down adjustment steel plate, second up-down adjustment steel plate and the 3rd up-down adjustment steel plate, wherein, first up-down adjustment steel plate is provided with multiple first anchor hole, second up-down adjustment steel plate is provided with multiple second anchor hole, 3rd up-down adjustment steel plate is provided with multiple 3rd anchor hole, the anchor hole quantity of three blocks of up-down adjustment steel plates of same model plate-girder is identical with anchor hole position,
---described beam making bench, for multiple;
---described steel strand, are many, and what these many steel strand were straight is placed on each beam making bench;
---described connector is multiple connector, and wherein, each root steel strand arranges two twin connectors i.e. the first twin connectors and the second twin connectors, separately has a single connector;
---finish rolling deformed bar, be provided with many finish rolling deformed bars, wherein, each root steel strand is furnished with three sections of finish rolling deformed bars, i.e. the first finish rolling deformed bar, second finish rolling deformed bar and the 3rd finish rolling deformed bar, wherein, one end of this first finish rolling deformed bar is fixed on the first anchor hole on the first up-down adjustment steel plate of jack moving beam outer face by the first nut, this the second finish rolling deformed bar one end is fixed on the second anchor hole that stretch-draw fixes on the second up-down adjustment steel plate of the outer face of gooseneck by the second nut, one end of 3rd finish rolling deformed bar is fixed on the 3rd anchor hole on the 3rd up-down adjustment steel plate of anchored end gooseneck outer face by the 3rd nut, the other end longitudinally through the first anchor hole of this first up-down adjustment steel plate and the first finish rolling deformed bar of the first rectangular opening is connected by single connector with the elongated end of the second finish rolling deformed bar of the outer face being fixed on the second up-down adjustment steel plate, should be connected by the first twin connectors with one end of described steel strand with the second finish rolling deformed bar other end of the second rectangular opening longitudinally through the second anchor hole of the second up-down adjustment steel plate, the other end of these each root steel strand is connected by the second twin connectors with the other end longitudinally through the 3rd anchor hole of the 3rd up-down adjustment steel plate and the 3rd finish rolling deformed bar of the 3rd rectangular opening.
Aforesaid a kind of Pretensioned Plate Beam orbit movable gooseneck integral tension device, wherein also comprise pre-tensioned plate lifting appliance, this pre-tensioned plate lifting appliance is made up of portal frame and pre-tensioned plate suspender, and wherein pre-tensioned plate suspender is arranged on portal frame, and this pre-tensioned plate suspender can 360 degree of rotations.
Aforesaid a kind of Pretensioned Plate Beam orbit movable gooseneck integral tension device, wherein said stretching end is fixed being provided with above of the second rectangular opening of gooseneck and is made up of i iron, steel plate that 2cm is thick, the stull of 1cm steel plate, wherein, described i iron is fixed on described steel plate and surrounds in the middle of framework, the both sides of this i iron arrange steel plate stull respectively, and the structure above the second rectangular opening that below the second rectangular opening that described stretching end fixes gooseneck, structure and stretching end fix gooseneck is identical;
It is identical with the structure that above-mentioned stretching end fixes gooseneck with the structure of described jack moving beam that described anchored end fixes gooseneck;
Two lateral surfaces of the second rectangular opening in the middle part of stretching end fixes gooseneck and below be provided with multiple second buckle, the second described up-down adjustment steel plate is buckled in stretching end by multiple second buckle and fixes the second rectangular opening place in the middle part of gooseneck;
Two lateral surfaces of the 3rd rectangular opening in the middle part of anchored end fixes gooseneck and below be provided with multiple 3rd buckle, the 3rd described up-down adjustment steel plate is buckled in anchored end by multiple 3rd buckle and fixes the 3rd rectangular opening place in the middle part of gooseneck;
Two lateral surfaces of the first rectangular opening in the middle part of jack moving beam and below be provided with multiple first buckle, the first described up-down adjustment steel plate is buckled in the first rectangular opening place at the middle part of jack moving beam by multiple first buckle.
Aforesaid a kind of Pretensioned Plate Beam orbit movable gooseneck integral tension device, be provided with screw thread in wherein said single connector, the first described finish rolling deformed bar is connected with the internal thread of the second finish rolling deformed bar by single connector, the first spring is provided with in the first wherein said twin connectors, the first intermediate plate is provided with in this first twin connectors the inner, internal thread is provided with in this first twin connectors, spring is provided with in the second wherein said twin connectors, intermediate plate is provided with in this second twin connectors the inner, internal thread is provided with in this second twin connectors, wherein, each described root steel strand one end packs in the first doubly-linked device and props up the first spring, and compress steel strand by the first intermediate plate, this the first twin connectors other end is connected with the second finish rolling deformed bar internal thread by internal thread, the other end of these steel strand packs in the second twin connectors and props up the second spring, and compress this steel strand by the second intermediate plate, this the second twin connectors other end is connected with the 3rd finish rolling deformed bar internal thread by internal thread.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid a kind of tensioning process adopting Pretensioned Plate Beam orbit movable gooseneck integral tension device, its step comprises:
Step 1: install up-down adjustment steel plate
Arrangement form according to multi-disc same model pre-tensioned plate prestressing tendon that will be prefabricated on every groove beam making bench selects corresponding up-down adjustment steel plate, and in the middle part of the outer face respectively by the first buckle, the second buckle and the 3rd buckle the first rectangular opening place in the middle part of the outer face corresponding to the structure of each beam making bench position identical the first up-down adjustment steel plate, the second up-down adjustment steel plate and the 3rd up-down adjustment steel plate and be buckled in respectively jack moving beam, stretching end being fixed gooseneck, the second rectangular opening place and anchored end fix the 3rd rectangular opening place in the middle part of gooseneck outer face;
Step 2: install steel strand
The quantity of steel strand and arrangement form install according to the form of bridge type design beam slab model to determine, straight for many steel strand is placed on each beam making bench, again one end of each root steel strand and the one end fixing each root second finish rolling deformed bar of the second rectangular opening in the middle part of gooseneck longitudinally through each second anchor hole of each the second up-down adjustment steel plate and stretching end are linked by each first twin connectors, and the other end of this each root second finish rolling deformed bar is anchored on this each second anchor hole by each second nut, the other end of these each root steel strand and the one end fixing each root the 3rd finish rolling deformed bar of the 3rd rectangular opening in the middle part of gooseneck longitudinally through each the 3rd anchor hole of each the 3rd up-down adjustment steel plate and anchored end are linked by each second twin connectors, again the other end of each root the 3rd finish rolling deformed bar is anchored on this each the 3rd anchor hole by the 3rd nut,
Step 3: pre-tension steel strand
Outside anchored end fixed cross beam, by each root the 3rd finish rolling deformed bar single tendon stretch, make each root steel strand tension to 10% of proof stress, tighten the 3rd nut that each root the 3rd essence pricks indented bars, with by all steel strand pretensions, draw straight;
Step 4: steel strand integral tension
By in place for this orbit movable platform and centering, again each one end longitudinally through each the first finish rolling deformed bar of the first rectangular opening in the middle part of each first anchor hole and the jack moving beam of the first up-down adjustment steel plate is connected by each single connector with the elongated end of every root second finish rolling deformed bar longitudinally through each second anchor hole on the second up-down adjustment steel plate, by this, the other end of each the first finish rolling deformed bar is anchored on each first anchor hole on the first up-down adjustment steel plate by the first nut screwing clamping again, then, two jack pushing tow jack moving beams are made to carry out steel strand integral tension, simultaneously, this jack moving beam is by vertically moving track and the second pulley makes orbit movable platform vertically move, when stretch-draw, 2 jack should be synchronous, after stretch-draw terminates, hold lotus 5min, stretching end is fixed each the second nut screwing clamping anchoring on gooseneck, this jack oil return, removes the single connector between the first finish rolling deformed bar and the second finish rolling deformed bar, this orbit movable platform carries out transverse shifting by transverse shifting track and the first pulley, moves to next groove and carries out pretensioning beam integral tension, to realize sequential production,
Step 5: put and open
After plate-girder concreting, concrete strength reaches 100% of design strength, and health expires 7 days, can put open steel strand, in place and the centering of this orbit movable platform, each single connector links each root first finish rolling deformed bar and each second finish rolling deformed bar, again tighten each first nut, with 2 jack synchronous push jack moving beams, this orbit movable platform vertically moves, the second nut on this stretching end fixed cross beam is separated with the second up-down adjustment steel plate, unclamp this each second nut to 20cm, this jack oil return, remove the first essence and prick indented bars and the second smart single connector pricked between indented bars, orbit movable stretch-draw platform is slowly longitudinally exited, this orbit movable platform carries out transverse shifting by transverse shifting track and the first pulley, move to next groove and carry out pretensioning beam Integral tension, to realize sequential production, after putting completely, first remove each twin connectors, then abrasive cutoff saw cutting of steel twisted wire is used, cutting sequence is fixed gooseneck toward anchored end cut with arranging steel strand successively for being fixed gooseneck from stretching end, first cut in the middle of two panels beam slab, again from the head of beam slab root cutting of steel twisted wire, symmetrical cutting, finally remove each second twin connectors, antirusting paint is smeared in beam end, reaches waterproof effect,
Step 6: move beam and deposit
Steel strand to be put, after excision, be arranged on portal frame by pre-tensioned plate suspender, utilize wire rope to connect pre-tensioned plate suspender and beam body, 360 degree of rotations, are transported to and deposit pedestal.
By technique scheme, Pretensioned Plate Beam orbit movable gooseneck integral tension equipment of the present invention at least has following advantages:
1. by orbit movable stretch-draw platform, can the steel strand of multi-disc beam in disposable integral stretch-draw conduit, and can the steel strand of the several conduit of continuously tensioning.Greatly save the time, accelerate the construction speed of Liang Chang;
2. according to the position that steel strand are laid, fix gooseneck and anchored end at stretching end to fix gooseneck outer face and all arrange up-down adjustment steel plate, finish rolling deformed bar is connected by connector with steel strand longitudinally through up-down adjustment steel plate, the steel strand that stretching end fixes gooseneck, anchored end is fixed between gooseneck to beam making bench all substitute with finish rolling deformed bar, the active length of steel strand can be reduced, reduce the consumption of steel strand, save steel strand;
3. owing to adopting integral tension, two jack synchronously carry out, every root steel strand uniform force;
4. owing to adopting integral tension, jack, oil pump access times reduce relatively, and use twin connectors to connect, and intermediate plate is positioned at connector, effectively prevents intermediate plate from flying out, adds safety factor;
5. fixing that outer face that gooseneck and anchored end fix gooseneck arranges at jack moving beam, stretching end can up-down adjustment steel plate, is convenient to the steel strand of plate, side plate in stretch-draw on same beam making bench;
6. orbit movable stretch-draw platform can longitudinally, transverse shifting.Vertically moving is be convenient to jack longitudinally-moving to carry out stretch-draw, and transverse shifting is the steel strand being convenient to next pedestal of stretch-draw.Be applicable to large-scale industrialized production, easy and simple to handle.
7. adopt pre-tensioned plate lifting appliance in order to lift by crane the good plate-girder of stretch-draw, 360 degree of rotations can be realized, go out hole and deposit, substantially increase effect.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of manual, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present invention.
The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Accompanying drawing explanation
Fig. 1 is the structural representation of the existing pre-tensioning system single tendon stretch of the present invention;
Fig. 2 is the structural representation of Pretensioned Plate Beam orbit movable gooseneck integral tension of the present invention;
Fig. 3 is the first twin connectors enlarged diagram shown in Fig. 2 of the present invention;
Fig. 4 is single connector enlarged diagram shown in Fig. 2 of the present invention;
Fig. 5 is the first nut enlarged diagram shown in Fig. 2 of the present invention;
Fig. 6 is twin connectors enlarged diagram shown in Fig. 2 of the present invention;
Fig. 7 is the positive elevational schematic view figure of portable stretch-draw platform shown in Fig. 2 of the present invention;
Fig. 8 is the floor map of Pretensioned Plate Beam orbit movable gooseneck integral tension of the present invention;
Fig. 9 is that stretching end shown in Fig. 8 of the present invention fixes gooseneck A-A profile;
Figure 10 is that stretching end shown in Fig. 8 of the present invention fixes gooseneck B-B profile;
Figure 11 is that shown in Fig. 8 of the present invention, stretching end fixes gooseneck front elevation view;
Figure 12 is that shown in Fig. 8 of the present invention, anchored end fixes gooseneck front elevation view;
Figure 13 is the front elevation view of jack moving beam shown in Fig. 8 of the present invention;
Figure 14 is the present invention is the first up-down adjustment steel plate schematic diagram shown in Fig. 2;
Figure 15 is the present invention is the second up-down adjustment steel plate schematic diagram shown in Fig. 2;
Figure 16 is the present invention is the 3rd up-down adjustment steel plate schematic diagram shown in Fig. 2;
Figure 17 is pre-tensioned plate lifting appliance structural representation of the present invention;
Wherein:
1: force-transmitting pole 2: beam making bench
3: stretching end fixes gooseneck
3-1: i iron 3-2: steel plate
3-3: steel plate stull
4: anchored end fixes gooseneck
5: orbit movable stretch-draw platform
5-1: jack 5-2: jack moving beam
5-3: vertically move track 5-4: transverse shifting track
5-5: coagulation earthen platform 5-6: the first pulley
5-7: plate platform 5-8: the first channel-section steel
5-9: oil pump 5-10: the second channel-section steel
5-11: the second pulley
6: the first finish rolling deformed bars 7: steel strand
8: the first connectors
8-1: the first intermediate plate 8-2: the first spring
9: single connector 10: the first nut
11: the first up-down adjustment steel plates
11-1 first anchor hole
12: pre-tensioned plate lifting appliance
12-1: portal frame 12-2 pre-tensioned plate suspender
13: the second finish rolling deformed bar 14: the second nuts
15: the three finish rolling deformed bar 16: the three nuts
17: the second twin connectors
17-1: the second intermediate plate 17-2: the second spring
18: the second up-down adjustment steel plates
18-1: the second anchor hole
19: the three up-down adjustment steel plates
19-1: the three anchor hole
20: the first rectangular opening 21: the second rectangular openings
22: the three rectangular opening 23-1: the first buckles
23-2 second buckle 23-3: the three buckle
Detailed description of the invention
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to the Pretensioned Plate Beam orbit movable gooseneck integral tension device proposed according to the present invention and its detailed description of the invention of construction technology, structure, feature and effect thereof, be described in detail as follows.
Refer to shown in Fig. 2-Figure 17, the Pretensioned Plate Beam orbit movable gooseneck integral tension device of present pre-ferred embodiments, it mainly comprises: force-transmitting pole 1, beam making bench 2, stretching end fix gooseneck 3, anchored end fixes gooseneck 4, orbit movable stretch-draw platform 5, finish rolling deformed bar, steel strand 7, connector, up-down adjustment steel plate, pre-tensioned plate lifting appliance 12.Wherein:
Consult shown in Fig. 2, Fig. 7, Fig. 8, described stretching end is fixed gooseneck 3 and anchored end and is fixed between gooseneck 4 and arrange beam making bench 2, and described beam making bench 2 is set to multiple, according to precasting yard site planning, arrange rational beam making bench 2 quantity, the present embodiment is set to 4.Wherein each beam making bench 2 both sides is provided with force-transmitting pole 1.Described steel strand 7, are many, and what these many steel strand 7 were straight is placed on each beam making bench 2, and quantity and the arrangement form of these steel strand 7 are different and different according to the beam slab model of bridge type design.
Consult shown in Fig. 2, Figure 10, Figure 11, Figure 12, this stretching end fixes steel horizontal stroke 3, for rectangle steel case, fix in the middle part of steel horizontal stroke 3 at this stretching end and be provided with the second rectangular opening 21 that longitudinal through stretching end fixes gooseneck 3, described anchored end fixes gooseneck 4 for rectangle steel case, fixes in the middle part of gooseneck 4 being provided with the 3rd rectangular opening 22 that longitudinal this anchored end through fixes gooseneck 4 in this anchored end.
Consult Fig. 2, Fig. 9, Figure 10 to be made up of steel plate 3-2,1cm steel plate stull 3-3 that i iron 3-1,2cm are thick on the second rectangular opening 21 that this stretching end fixes gooseneck 3, wherein, described i iron 3-1 is fixed on described steel plate 3-2 and surrounds in the middle of framework, the both sides of this i iron 3-1 arrange steel plate stull 3-3 respectively, and the structure above the second rectangular opening 21 that below the second rectangular opening 21 that described stretching end fixes gooseneck 3, structure and stretching end fix gooseneck 3 is identical.It is identical with the structure that above-mentioned stretching end fixes gooseneck 3 with the structure of described jack moving beam 5-2 that this anchored end fixes gooseneck 4.
Consult Figure 11 and Figure 12, stretching end fix the second rectangular opening 21 of gooseneck 3 two lateral surfaces and below be provided with multiple second buckle 23-2, anchored end fix the 3rd rectangular opening 22 of gooseneck 4 both sides lateral surface and below be provided with multiple 3rd buckle 23-3.
Consult shown in Fig. 2, Fig. 7, Fig. 8, described orbit movable platform 5, by 2 jack 5-1, jack moving beam 5-2, vertically move track 5-3, transverse shifting track 5-4, coagulation earthen platform 5-5,4 the first pulley 5-6, plate platform 5-7, the first channel-section steel 5-8,2 oil pump 5-9, the second channel-section steel 5-10,4 the second pulley 5-11, bracing frame 5-12 form.Wherein
Fix gooseneck 3 side at stretching end and one hole groove is set, in the bottom transverse of this hole groove, two row's coagulation earthen platform 5-5 are set, as the brace foundation of transverse shifting track 5-4.Two transverse shifting track 5-4 are separately positioned on above this two rows coagulation earthen platform 5-5, the first channel-section steel 5-8 is provided with on these two transverse shifting track 5-4,4 first pulley 5-6 that laterally can slide on two transverse shifting track 5-4 are set at the bottom surface of this first channel-section steel 5-8, make this orbit movable stretch-draw platform 5 by two the transverse shifting track 5-4s of these 4 the first pulley 5-6 on the 5-5 of coagulation earthen platform laterally slide, reach the object of transverse shifting.On the first channel-section steel 5-8, plate platform 5-7 is provided with at this, on this plate platform 5-7, be provided with two vertically move track 5-3, vertically move above track 5-3 be provided with the second channel-section steel 5-10 at this, 4 second pulley 5-11 that can vertically move longitudinal sliding motion on track 5-3 at two are set at the bottom surface of this second channel-section steel 5-10, make this orbit movable stretch-draw platform 5 vertically move longitudinal sliding motion on track 5-3 by this plate platform 5-7 two of these 4 the second pulley 5-11; On this second channel-section steel 5-10, jack moving beam 5-2 is set, these two jack 5-1 are separately fixed at this jack moving beam 5-2 side and are supported by the bracing frame 5-12 be fixed on the second channel-section steel 5-10, vertically moved by orbit movable stretch-draw platform 5 and two jack 5-1 are abutted against stretching end fix on gooseneck 3 outer face, carry out stretch-draw.These two oil pump 5-9 are steadily arranged on above jack moving beam 5-2, each oil pump 5-9 is connected by hydraulic tube with each jack 5-1, the middle part of described jack moving beam 5-2 is provided with first rectangular opening 20 of longitudinally through this jack moving beam 5-2, two lateral surfaces of this first rectangular opening 20 and fix multiple first buckle 23-1 below.
Consult shown in Fig. 2, Figure 14, Figure 15, Figure 16, described up-down adjustment steel plate, be provided with the up-down adjustment steel plate of multiple beam slab model, wherein the up-down adjustment steel plate of each beam slab model is provided with 3 blocks of up-down adjustment steel plates, i.e. the first up-down adjustment steel plate 11, second up-down adjustment steel plate 18, the 3rd up-down adjustment steel plate 19, each beam making bench 2 corresponding of the first rectangular opening 20 place in the middle part of described jack moving beam 5-2 arranges the first up-down adjustment steel plate 11, each beam making bench 2 position corresponding, the second rectangular opening 21 place that described stretching end fixes the middle part of gooseneck 3 is provided with the second up-down adjustment steel plate 18, each beam making bench 2 position corresponding, the 3rd rectangular opening 22 place that described anchored end fixes the middle part of gooseneck 4 is provided with the 3rd up-down adjustment steel plate 19, wherein, according to the difference of beam slab model, first up-down adjustment steel plate 11 is provided with multiple first anchor hole 11-1, second up-down adjustment steel plate 18 is provided with multiple second anchor hole 18-1, 3rd up-down adjustment steel plate 19 is provided with multiple 3rd anchor hole 19-1, the anchor hole quantity of three blocks of up-down adjustment steel plates of same plate-girder model is identical with anchor hole position.
Consult shown in Figure 11, Figure 12, Figure 13, the first described up-down adjustment steel plate is buckled in the first rectangular opening 20 place in the middle part of jack moving beam 5-2 by multiple first buckle 23-1, and the second described up-down adjustment steel plate 18 is buckled in stretching end by multiple second buckle 23-2 and fixes the second rectangular opening 21 place in the middle part of gooseneck 3; The 3rd described up-down adjustment steel plate 19 is buckled in anchored end by the 3rd buckle 23-3 and fixes the 3rd rectangular opening 22 place in the middle part of gooseneck 4.
Consult shown in Fig. 2, Fig. 6, Fig. 8, described connector is multiple connector, and wherein, each root steel strand 7 arranges two twin connectors i.e. the first twin connectors 8 and the second twin connectors 17, separately has a single connector 9.Consult shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, in this single connector 9, be provided with screw thread.Be provided with the first spring 8-2 in this first twin connectors 8, be provided with the first intermediate plate 8-1 in this first twin connectors 8 the inner, in this first twin connectors 8, be provided with internal thread.Be provided with spring 17-2 in this second twin connectors 17, be provided with intermediate plate 17-1 in this second twin connectors 17 the inner, in this second twin connectors 17, be provided with internal thread.
Consult 2-8, shown in Figure 13-15, described finish rolling deformed bar is provided with many, wherein, each root steel strand 7 is furnished with three sections of finish rolling deformed bars, i.e. the first finish rolling deformed bar 6, second finish rolling deformed bar 13 and the 3rd finish rolling deformed bar 15, wherein, fix gooseneck 3 and anchored end at stretching end to fix gooseneck 4 two ends and be respectively equipped with the second finish rolling deformed bar 13 and the 3rd finish rolling deformed bar 15 and fix gooseneck 3 and anchored end due to stretching end and fix gooseneck 4 two ends and all adopt finish rolling deformed bar to instead of a part of steel strand, reach the object of saving steel strand.One end of this first finish rolling deformed bar 6 is fixed on the first anchor hole 11-1 of the first up-down adjustment steel plate 11 of jack Mobile steel crossbeam 5-2 outer face by the first nut 10, this second finish rolling deformed bar 13 is fixed on the second anchor hole 18-1 that stretch-draw fixes on the second up-down adjustment steel plate 18 of the outer face of gooseneck 3 by the second nut 14, one end of 3rd finish rolling deformed bar 15 is fixed on the 3rd anchor hole 19-1 of the 3rd up-down adjustment steel plate 19 of anchored end gooseneck 4 outer face by the 3rd nut 16, for ease of stretch-draw, one end longitudinally through the first anchor hole 11-1 of the first up-down adjustment steel plate 11 and the first finish rolling deformed bar 6 of the first rectangular opening 20 is connected by single connector 9 with the elongated end of the second finish rolling deformed bar 13 of the outer face being fixed on the second up-down adjustment steel plate 18, this the second finish rolling deformed bar 13 other end is connected by the first twin connectors 8 with one end of described steel strand 7 with the second rectangular opening 21 longitudinally through the second anchor hole 18-1 of the second up-down adjustment steel plate 18, the other end of these steel strand 7 is connected by the second twin connectors 17 with the one end longitudinally through the 3rd anchor hole 19-1 of the 3rd up-down adjustment steel plate 19 and the 3rd finish rolling deformed bar 15 of the 3rd rectangular opening 22.
Consult shown in Fig. 4, the first described finish rolling deformed bar 6 is connected by the internal thread of single connector 9 with the second finish rolling deformed bar 13.Consult shown in Fig. 3, wherein said steel strand 7 one end packs in the first doubly-linked device 8 and props up the first spring 8-2, and compress steel strand 7 by the first intermediate plate 8-1, this the first twin connectors 8 other end is connected with the second finish rolling deformed bar 13 internal thread by internal thread, consult shown in Fig. 6, the other end of these steel strand 7 packs in the second doubly-linked device 17 and props up the second spring 17-2, and compressing this steel strand 7 by the second intermediate plate 17-1, the other end of this second twin connectors 17 is connected with the 3rd finish rolling deformed bar 15 internal thread by internal thread.
Consult shown in Figure 17, described pre-tensioned plate lifting appliance 12, this pre-tensioned plate lifting appliance 12 is made up of portal frame 12-1 and pre-tensioned plate suspender 12-2, and the pre-tensioned plate suspender 12-2 that wherein can rotate 360 degree is arranged on portal frame 12-1.
Adopt the construction technology of Pretensioned Plate Beam orbit movable gooseneck integral tension device, its step is as follows:
Step 1: install up-down adjustment steel plate
Arrangement form according to multi-disc same model pre-tensioned plate prestressing tendon that will be prefabricated on every groove beam making bench 2 selects corresponding up-down adjustment steel plate, respectively by the first buckle 23-1, second buckle 23-2 and the 3rd buckle 23-3 are by the first identical for the structure corresponding to each beam making bench 2 position up-down adjustment steel plate 11, first rectangular opening 20 place in the middle part of the outer face that second up-down adjustment steel plate 18 and the 3rd up-down adjustment steel plate 19 are buckled in jack moving beam 5-2 respectively, in the middle part of the outer face that stretching end fixes gooseneck 3, the second rectangular opening 21 place and anchored end fix the 3rd rectangular opening 22 place in the middle part of gooseneck 4 outer face,
Step 2: install steel strand 7
The quantity of steel strand 7 and arrangement form install according to the form of bridge type design beam slab model to determine, straight for many steel strand 7 is placed on each beam making bench 2, again one end of each root steel strand 7 and the one end fixing each root second finish rolling deformed bar 13 of the second rectangular opening 21 in the middle part of gooseneck 3 longitudinally through each second anchor hole 18-1 of each the second up-down adjustment steel plate 18 and stretching end are linked by each first twin connectors 8, and the other end of this each root second finish rolling deformed bar 13 is anchored on this each second anchor hole 18-1 by each second nut 14, the other end of these each root steel strand 7 and the one end fixing each root the 3rd finish rolling deformed bar 15 of the 3rd rectangular opening 22 in the middle part of gooseneck 4 longitudinally through each the 3rd anchor hole 19-1 of each the 3rd up-down adjustment steel plate 19 and anchored end are linked by each second twin connectors 17, again the other end of each root the 3rd finish rolling deformed bar 15 is anchored on this each the 3rd anchor hole 19-1 by the 3rd nut 16,
Step 3: pre-tension steel strand 7
Outside anchored end fixed cross beam 4, by each root the 3rd finish rolling deformed bar 15 single tendon stretch, each root steel strand 7 is made to be stretched to 10% of proof stress, tighten the 3rd nut 16 that each root the 3rd essence pricks indented bars 15, with by all steel strand 7 pretensions, draw straight, make each root steel strand 7 uniform force when integral tension.
Step 4: steel strand integral tension
By in place for this orbit movable platform 5 and centering, again each one end longitudinally through each the first finish rolling deformed bar 6 of the first rectangular opening 20 in the middle part of each first anchor hole 11-1 and the jack moving beam 5-2 of the first up-down adjustment steel plate 11 is connected by each single connector 9 with the elongated end of every root second finish rolling deformed bar 13 longitudinally through each second anchor hole 18-1 on the second up-down adjustment steel plate 18, by this, the other end of each the first finish rolling deformed bar 6 is tightened on each first anchor hole 11-1 of being anchored on the first up-down adjustment steel plate 11 by the first nut 10 again, then, two jack 5-1 pushing tow jack moving beam 5-2 are made to carry out steel strand 7 integral tension, simultaneously, this jack moving beam 5-2 is by vertically moving track 5-3 and the second pulley 5-11 makes orbit movable platform 5 vertically move, when stretch-draw, 2 jack 5-1 should be synchronous, after stretch-draw terminates, hold lotus 5min, but " highway bridge and culvert construction technique normalizing " (JTG/T F50-2011) failed call holds lotus when meeting the low relaxation steel strand tension of " steel strand for prestressed concrete " (GB/T 5224-2003) standard, the present invention takes to hold lotus 5min measure, presstressed reinforcing steel is completed lax.Each second nut 14 fixed by stretching end on gooseneck 3 tightens anchoring, and the single connector 9 between the first finish rolling deformed bar 6 and the second finish rolling deformed bar 13 is removed in this jack 5-1 oil return; This orbit movable platform 5 carries out transverse shifting by transverse shifting track 5-4 and the first pulley 5-6, moves to next groove and carries out pretensioning beam integral tension, to realize sequential production;
Step 5: put and open
After plate-girder concreting, concrete strength reaches 100% of design strength, and health expires 7 days, can to put steel strand 7, and during to prevent from putting, crack appears in plate-girder; In place and the centering of this orbit movable platform 5, each single connector 9 links each root first finish rolling deformed bar 6 and each second finish rolling deformed bar 13, again tighten each first nut 10, guarantee that the first finish rolling deformed bar 6 is connected reliably with the second finish rolling deformed bar 13, uniform force.With 2 jack 5-1 synchronous push jack moving beam 5-2, this orbit movable platform 5 vertically moves, the second nut 14 on this stretching end fixed cross beam 3 is separated with the second up-down adjustment steel plate 18, unclamp this each second nut 14 to 20cm, this jack 5-1 oil return, remove the first essence and prick indented bars 6 and the second smart single connector 9 pricked between indented bars 13, orbit movable stretch-draw platform 5 is slowly longitudinally exited, this orbit movable platform 5 carries out transverse shifting by transverse shifting track 5-4 and the first pulley 5-6, move to next groove and carry out pretensioning beam Integral tension, to realize sequential production, after putting completely, second finish rolling deformed bar 13 is in zero stress state substantially, first can remove each twin connectors 8, then abrasive cutoff saw cutting of steel twisted wire 7 is used, cutting sequence is fixed gooseneck 4 toward anchored end and cut with row's steel strand 7 successively for fixing gooseneck 3 from stretching end, first incision in the middle of two panels beam slab, then from the head of beam slab root cutting of steel twisted wire 7, want symmetrical cutting, preventing board beam stress is uneven, finally remove each second twin connectors 17, now this second twin connectors 17 stress is minimum, antirusting paint is smeared in beam end, reaches waterproof effect.
Step 6: move beam and deposit
Steel strand 7 to be put, after excision, be arranged on portal frame 12-1 by pre-tensioned plate suspender 12-2, utilize wire rope to connect pre-tensioned plate suspender 12-2 and beam body, 360 degree of rotations, are transported to and deposit pedestal.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (5)
1. a Pretensioned Plate Beam orbit movable gooseneck integral tension device, comprise stretching end to fix gooseneck (3) and anchored end and fix gooseneck (4), steel strand (7) and be arranged on stretching end and fix gooseneck (3) and anchored end and fix beam making bench (2) between gooseneck (4), and be arranged on the force-transmitting pole (1) of each beam making bench (2) both sides, characterized by further comprising:
---orbit movable platform (5), by 2 jack (5-1), jack moving beam (5-2), vertically move track (5-3), transverse shifting track (5-4), coagulation earthen platform (5-5), 4 the first pulleys (5-6), plate platform (5-7), the first channel-section steel (5-8), 2 oil pumps (5-9), the second channel-section steel (5-10), 4 the second pulleys (5-11), bracing frame (5-12), wherein
Fix gooseneck (3) side at stretching end and one hole groove is set, in the bottom transverse of this hole groove, two row's coagulation earthen platforms (5-5) are set, two transverse shifting tracks (5-4) are separately positioned on above this two row coagulation earthen platform (5-5), the first channel-section steel (5-8) is provided with on these two transverse shifting tracks (5-4), arranging at the bottom surface of this first channel-section steel (5-8) can upper 4 the first pulley (5-6) laterally slided of two transverse shifting tracks (5-4), this orbit movable stretch-draw platform (5) is laterally slided by two transverse shifting tracks (5-4) of these 4 first pulleys (5-6) on coagulation earthen platform (5-5) are upper, plate platform (5-7) is provided with on this first channel-section steel (5-8), on this plate platform (5-7), be provided with two vertically move track (5-3), vertically move above track (5-3) be provided with the second channel-section steel (5-10) at this, 4 second pulleys (5-11) that can vertically move the upper longitudinal sliding motion of track (5-3) at two are set at the bottom surface of this second channel-section steel (5-10), this orbit movable stretch-draw platform (5) is made to vertically move the upper longitudinal sliding motion of track (5-3) by this plate platform (5-7) two of these 4 second pulleys (5-11), on this second channel-section steel (5-10), jack moving beam (5-2) is set, these two jack (5-1) are separately fixed at this jack moving beam (5-2) side and are supported by the bracing frame (5-12) be fixed on the second channel-section steel (5-10), vertically moved by orbit movable stretch-draw platform (5), two jack (5-1) are abutted against stretching end fixes on gooseneck (3) outer face, two described oil pumps (5-9) are steadily arranged on above jack moving beam (5-2), each oil pump (5-9) is connected by hydraulic tube with corresponding jack (5-1), the middle part of described jack moving beam (5-2) is provided with first rectangular opening (20) of longitudinally this jack moving beam (5-2) through,
---described stretching end fixes gooseneck (3), for rectangle steel case, fix gooseneck (3) middle part at this stretching end and be provided with the second rectangular opening (21) that longitudinal through stretching end fixes gooseneck (3), described anchored end fixes gooseneck (4) for rectangle steel case, fixes gooseneck (4) middle part be provided with the 3rd rectangular opening (22) that longitudinal this anchored end through fixes gooseneck (4) in this anchored end;
---up-down adjustment steel plate, be provided with the up-down adjustment steel plate adapting to multiple beam slab model, wherein the up-down adjustment steel plate of each beam slab model is provided with 3 blocks of up-down adjustment steel plates, i.e. the first up-down adjustment steel plate (11), second up-down adjustment steel plate (18), 3rd up-down adjustment steel plate (19), first rectangular opening (20) place at described jack moving beam (5-2) middle part, described stretching end is fixed corresponding each beam making bench (2) position, the 3rd rectangular opening (22) place that the second rectangular opening (21) place at the middle part of gooseneck (3) and described anchored end fix gooseneck (4) middle part and is respectively equipped with the first up-down adjustment steel plate (11), second up-down adjustment steel plate (18) and the 3rd up-down adjustment steel plate (19), wherein, first up-down adjustment steel plate (11) is provided with multiple first anchor hole (11-1), second up-down adjustment steel plate (18) is provided with multiple second anchor hole (18-1), 3rd up-down adjustment steel plate (19) is provided with multiple 3rd anchor hole (19-1), the anchor hole quantity of three blocks of up-down adjustment steel plates of same model plate-girder is identical with anchor hole position,
---described beam making bench (2), for multiple;
---described steel strand (7), are many, and what these many steel strand (7) were straight is placed on each beam making bench (2);
---described connector is multiple connector, and wherein, each root steel strand (7) arranges two twin connectors i.e. the first twin connectors (8) and the second twin connectors (17), separately has a single connector (9);
- Finishing rebar with a plurality of finishing rebar, which, every strand (7) with a three-stage finishing rebar, the first finishing rebar (6), finishing second rebar (13) and third finishing rebar (15), wherein the end of the first finishing rebar (6) via the first nut (10) fixed (5-2) at the outer end of the jack moving beam adjustable steel first anchor hole (11) (11-1) on the first down, the second finishing rebar (13) at one end (14) fixed tension steel beams fixed (3) through the second nut The second outer end face of the anchor hole of the second upper and lower adjustment plate (18) (18-1), the end of the third finishing threaded bar (15) by a third nut (16) secured to the anchor end of the steel beams ( The third hole of the third upper and lower anchor 4) the outer end face of the adjustment plate (19) on (19-1); a first anchor hole longitudinally through the first upper and lower adjustment plate (11) of (11-1) and finishing second rebar (13) of the outer end face of the extended end of a rectangular hole (20) in the first finishing rebar (6) fixed to the other end of the second upper and lower adjustable steel plate (18) in a single connector (9) is connected, through the second upper and lower longitudinal adjustment plate (18) of the second anchor and the other end of said bore (18-1) and a second rectangular hole (21) of the second finishing rebar (13) One end of the strand (7) is connected via a first double connector (8), each of the strand (7) and the other end of the third longitudinally through the vertical adjustment plate (19) of a third anchoring openings (19-1) and third rectangular holes (22) in the third finishing rebar (15) and the other end connected through a second double connector (17).
2. a kind of Pretensioned Plate Beam orbit movable gooseneck integral tension device according to claim 1, characterized by further comprising pre-tensioned plate lifting appliance (12), this pre-tensioned plate lifting appliance (12) is made up of portal frame (12-1) and pre-tensioned plate suspender (12-2), wherein pre-tensioned plate suspender (12-2) is arranged on portal frame (12-1), and this pre-tensioned plate suspender (12-2) can 360 degree of rotations.
3. according to a kind of Pretensioned Plate Beam orbit movable gooseneck integral tension device in claim 1-2 described in any one, it is characterized in that: what described stretching end fixed second rectangular opening (21) of gooseneck (3) is above provided with by i iron (3-1), the steel plate (3-2) that 2cm is thick, 1cm steel plate stull (3-3) forms, wherein, described i iron (3-1) is fixed on described steel plate (3-2) and surrounds in the middle of framework, the both sides of this i iron (3-1) arrange steel plate stull (3-3) respectively, structure above the second rectangular opening (21) that below the second rectangular opening (21) that described stretching end fixes gooseneck (3), structure and stretching end fix gooseneck (3) is identical,
It is identical with the structure that above-mentioned stretching end fixes gooseneck (3) with the structure of described jack moving beam (5-2) that described anchored end fixes gooseneck (4);
Stretching end fix second rectangular opening (21) at gooseneck (3) middle part two lateral surfaces and below be provided with multiple second buckle (23-2), the second described up-down adjustment steel plate (18) is buckled in stretching end by multiple second buckle (23-2) and fixes the second rectangular opening (21) place in the middle part of gooseneck (3);
Anchored end fix the 3rd rectangular opening (22) at gooseneck (4) middle part two lateral surfaces and below be provided with multiple 3rd buckle (23-3), the 3rd described up-down adjustment steel plate (19) is buckled in anchored end by multiple 3rd buckle (23-3) and fixes the 3rd rectangular opening (22) place in the middle part of gooseneck (4);
Jack moving beam (5-2) middle part the first rectangular opening (20) two lateral surfaces and below be provided with multiple first buckle (23-1), the first described up-down adjustment steel plate (11) is buckled in the first rectangular opening (20) place at the middle part of jack moving beam (5-2) by multiple first buckle (23-1).
4. according to a kind of Pretensioned Plate Beam orbit movable gooseneck integral tension device according to claim 3, it is characterized in that: be provided with screw thread in wherein said single connector (9), described the first finish rolling deformed bar (6) is connected with the internal thread of the second finish rolling deformed bar (13) by single connector (9), the first spring (8-2) is provided with in wherein said the first twin connectors (8), the first intermediate plate (8-1) is provided with in this first twin connectors (8) the inner, internal thread is provided with in this first twin connectors (8), spring (17-2) is provided with in wherein said the second twin connectors (17), intermediate plate (17-1) is provided with in this second twin connectors (17) the inner, internal thread is provided with in this second twin connectors (17), wherein, each described root steel strand (7) one end packs in the first doubly-linked device (8) and props up the first spring (8-2), and compress steel strand (7) by the first intermediate plate (8-1), this the first twin connectors (8) other end is connected with the second finish rolling deformed bar (13) internal thread by internal thread, the other end of these steel strand (7) packs in the second twin connectors (17) and props up the second spring (17-2), and compress these steel strand (7) by the second intermediate plate (17-1), this the second twin connectors (17) other end is connected with the 3rd finish rolling deformed bar (15) internal thread by internal thread.
5. adopt a tensioning process for claim 1 Pretensioned Plate Beam orbit movable gooseneck integral tension device, it is characterized in that: its step comprises:
Step 1: install up-down adjustment steel plate
Arrangement form according to multi-disc same model pre-tensioned plate prestressing tendon that will be prefabricated on every groove beam making bench (2) selects corresponding up-down adjustment steel plate, respectively by the first buckle (23-1), second buckle (23-2) and the 3rd buckle (23-3) will corresponding to identical the first up-down adjustment steel plates (11) of the structure of each beam making bench (2) position, first rectangular opening (20) place in the middle part of the outer face that second up-down adjustment steel plate (18) and the 3rd up-down adjustment steel plate (19) are buckled in jack moving beam (5-2) respectively, in the middle part of the outer face that stretching end fixes gooseneck (3), the second rectangular opening (21) place and anchored end fix the 3rd rectangular opening (22) place in the middle part of gooseneck (4) outer face,
Step 2: install steel strand
The quantity of steel strand (7) and arrangement form install according to the form of bridge type design beam slab model to determine, straight for many steel strand (7) is placed on each beam making bench (2), again each first twin connectors (8) is passed through with the one end of each root second finish rolling deformed bar (13) fixing gooseneck (3) middle part the second rectangular opening (21) longitudinally through each second anchor hole (18-1) of each the second up-down adjustment steel plate (18) and stretching end in one end of each root steel strand (7) to link, and the other end of this each root second finish rolling deformed bar (13) is anchored on this each second anchor hole (18-1) by each second nut (14), the other end of these each root steel strand (7) is passed through each second twin connectors (17) with one end of each root the 3rd finish rolling deformed bar (15) fixing gooseneck (4) middle part the 3rd rectangular opening (22) longitudinally through each the 3rd anchor hole (19-1) of each the 3rd up-down adjustment steel plate (19) and anchored end link, again the other end of each root the 3rd finish rolling deformed bar (15) is anchored on this each the 3rd anchor hole (19-1) by the 3rd nut (16),
Step 3: pre-tension steel strand
In anchored end fixed cross beam (4) outside, by each root the 3rd finish rolling deformed bar (15) single tendon stretch, each root steel strand (7) is made to be stretched to 10% of proof stress, tighten the 3rd nut (16) that each root the 3rd essence pricks indented bars (15), with by all steel strand (7) pretensions, draw straight;
Step 4: steel strand integral tension
By in place for this orbit movable platform (5) and centering, again each each first anchor hole (11-1) longitudinally through the first up-down adjustment steel plate (11) is passed through each single connector (9) with one end of each the first finish rolling deformed bar (6) of first rectangular opening (20) at jack moving beam (5-2) middle part with the elongated end of every root second finish rolling deformed bar (13) longitudinally through each second anchor hole (18-1) on the second up-down adjustment steel plate (18) to be connected, by this, the other end of each the first finish rolling deformed bar (6) is tightened on each first anchor hole (11-1) of being anchored on the first up-down adjustment steel plate (11) by the first nut (10) again, then, two jack (5-1) pushing tow jack moving beam (5-2) are made to carry out steel strand (7) integral tension, simultaneously, this jack moving beam (5-2) is by vertically moving track (5-3) and the second pulley (5-11) makes orbit movable platform (5) vertically move, when stretch-draw, 2 jack (5-1) should be synchronous, after stretch-draw terminates, hold lotus 5min, each second nut (14) fixed by stretching end on gooseneck (3) tightens anchoring, this jack (5-1) oil return, removes the single connector (9) between the first finish rolling deformed bar (6) and the second finish rolling deformed bar (13), this orbit movable platform (5) carries out transverse shifting by transverse shifting track (5-4) and the first pulley (5-6), moves to next groove and carries out pretensioning beam integral tension, to realize sequential production,
Step 5: put and open
After plate-girder concreting, concrete strength reaches 100% of design strength, and health expires 7 days, can put open steel strand (7), in place and the centering of this orbit movable platform (5), each single connector (9) links each root first finish rolling deformed bar (6) and each the second finish rolling deformed bar (13), again tighten each first nut (10), with 2 jack (5-1) synchronous push jack moving beam (5-2), this orbit movable platform (5) vertically moves, the second nut (14) on this stretching end fixed cross beam (3) is separated with the second up-down adjustment steel plate (18), unclamp this each second nut (14) to 20cm, this jack (5-1) oil return, remove the first essence and prick indented bars (6) and the second smart single connector (9) pricked between indented bars (13), orbit movable stretch-draw platform (5) is slowly longitudinally exited, this orbit movable platform (5) carries out transverse shifting by transverse shifting track (5-4) and the first pulley (5-6), move to next groove and carry out pretensioning beam Integral tension, to realize sequential production, after putting completely, first remove each twin connectors (8), then abrasive cutoff saw cutting of steel twisted wire (7) is used, cutting sequence is fixed gooseneck (4) toward anchored end and cut for fixing gooseneck (3) from stretching end successively and together arrange steel strand (7), first cut in the middle of two panels beam slab, again from the head of beam slab root cutting of steel twisted wire (7), symmetrical cutting, finally remove each second twin connectors (17), antirusting paint is smeared in beam end, reaches waterproof effect,
Step 6: move beam and deposit
Steel strand (7) to be put, after excision, pre-tensioned plate suspender (12-2) is arranged on portal frame (12-1), utilize wire rope to connect pre-tensioned plate suspender (12-2) and beam body, 360 degree of rotations, are transported to and deposit pedestal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310158889.1A CN103255718B (en) | 2013-04-28 | 2013-04-28 | Pre-tensioning method plate-beam track movable type steel transverse beam integer tensioning device and tensioning technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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