CN201857576U - Supporting device for installing post-tensioned precast prestressed concrete box girder - Google Patents
Supporting device for installing post-tensioned precast prestressed concrete box girder Download PDFInfo
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- CN201857576U CN201857576U CN2010202636485U CN201020263648U CN201857576U CN 201857576 U CN201857576 U CN 201857576U CN 2010202636485 U CN2010202636485 U CN 2010202636485U CN 201020263648 U CN201020263648 U CN 201020263648U CN 201857576 U CN201857576 U CN 201857576U
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- slideway
- bracing frame
- prestressed concrete
- concrete box
- box girders
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Abstract
The utility model relates to a supporting device for installing a post-tensioned precast prestressed concrete box girder, which is characterized by comprising a first supporting bracket, a first slideway, a second supporting bracket and a second slideway; the first and the second supporting brackets are paved inside a tensioning section of a prestressed reinforcing steel, both the first and the second supporting brackets are distributed along the installation direction of the post-tensioned precast prestressed concrete box girder, the first supporting bracket is parallel to the second supporting bracket, the first slideway is paved on the first supporting bracket, the second slideway is paved on the second supporting bracket, the first slideway is parallel to the second slideway, and the distance between the first slideway and the second slideway is smaller than the width of the bottom surface of the post-tensioned precast prestressed concrete box girder. After the supporting device is adopted, the box girder is simple and convenient to install and construct.
Description
Technical field
The utility model belongs to precast prestressed concrete case beam installation Technology field, is specifically related to a kind of bracing or strutting arrangement that post tensioned prestressed concrete box girders is installed that is used for.
Background technology
Each span centre of precast assembly section has 8-12 piece case beam by interim compressive pre-stress extruding the case beam closely to be bolted together with adhering with epoxy resin, and the stretch-draw steel hinge line forms continuous span then, after tension of prestressed tendon is intact, with its unloading.Carry out next section precast concrete case beam and install, the whole bridge of prefabricated case beam only needs can satisfy the prefabricated case beam installation once striding half bracing frame.Precast concrete case beam adopts hoisting weight to lift for the 100t straddle truck, and the box-shaped sheet beam of lifting is sling with straddle truck, is placed on the support.There is the end face cleaning of shear connector clean the box-shaped plate, then two blocks of adjacent box-shaped plates are tried assembly unit, after corresponding convex-concave two sides matches fully, a box-shaped plate of back lifting is hung about last 1000m, the brushing work of epoxy resin is carried out in preparation, will glue a series of activities such as obedient duct sealing ring because of the duct that will carry out the brushing of epoxy resin, every beam between the every beam, every beam is all wanted just can finish about two hours, and straddle truck can not wait for a long time.
Summary of the invention
The purpose of this utility model provides a kind of bracing or strutting arrangement that post tensioned prestressed concrete box girders is installed that is used for, and adopts this bracing or strutting arrangement rear cabinet beam installation easy.
For achieving the above object, technical solution adopted in the utility model is: be used for the bracing or strutting arrangement that post tensioned prestressed concrete box girders is installed, it is characterized in that it comprises first bracing frame, first slideway, second bracing frame, second slideway; First bracing frame and second bracing frame are laid on a case beam and install in the span, and first bracing frame and second bracing frame are all arranged along the direction that post tensioned prestressed concrete box girders is installed, first bracing frame is parallel with second bracing frame, be equipped with first slideway on first bracing frame, be equipped with second slideway on second bracing frame, first slideway is parallel with second slideway, and the spacing between first slideway and second slideway is less than the width of post tensioned prestressed concrete box girders bottom surface.
Described first slideway comprises vertical i iron, corrosion resistant plate, polyfluortetraethylene plate and steel plate; Vertically the upper surface point of i iron is welded with corrosion resistant plate, and the upper surface of corrosion resistant plate is equipped with polyfluortetraethylene plate, is equipped with steel plate on the polyfluortetraethylene plate.The structure of second slideway is identical with the structure of first slideway.
The beneficial effects of the utility model are: after adopting said structure, be used for the installation of post tensioned prestressed concrete box girders, and easy construction, workable, saving of work and time; (can under the narrow situation in place, carry out, be applicable to all types of prestressed concrete box girders install) applied widely.
Description of drawings
Fig. 1 is the structural representation (post tensioned prestressed concrete box girders is arranged among the figure) of bracing or strutting arrangement of the present utility model;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the structural representation of first bracing frame;
Fig. 4 is the structural representation of first slideway;
Among the figure: 1-first bracing frame, 2-first slideway, 3-second bracing frame, 4-second slideway, 5-post tensioned prestressed concrete box girders, 6-sleeper, adjusting screw mandrel under the 7-, 8-bridging, 9-vertical rod, 10-adjusted screw mandrel, the horizontal i iron (14 of 11-
#I iron), 12-cross bar, the vertical i iron (20 of 13-
#I iron), 14-corrosion resistant plate, 15-polyfluortetraethylene plate, 16-steel plate.
The specific embodiment
As shown in Figure 1 and Figure 2, be used for the bracing or strutting arrangement that post tensioned prestressed concrete box girders is installed, it comprises first bracing frame 1, first slideway 2, second bracing frame 3, second slideway 4; First bracing frame 1 and second bracing frame 3 are laid on a case beam and install in the span, and first bracing frame 1 and second bracing frame 3 are all arranged along the direction that post tensioned prestressed concrete box girders (abbreviation prefabricated case beam) is installed, first bracing frame 1 is parallel with second bracing frame 3, be equipped with first slideway 2 on first bracing frame 1, be equipped with second slideway 4 on second bracing frame 3, first slideway 2 is parallel with second slideway 4, and the spacing between first slideway 2 and second slideway 4 (is that post tensioned prestressed concrete box girders 5 can be shelved on first slideway 2 less than the width of post tensioned prestressed concrete box girders 5 bottom surfaces, on second slideway 4).
Described first slideway 2 comprises vertical i iron 13, corrosion resistant plate 14, polyfluortetraethylene plate 15 and steel plate 16; Vertically the upper surface point of i iron 13 is welded with corrosion resistant plate 14, and the upper surface of corrosion resistant plate 14 is equipped with polyfluortetraethylene plate 15, is equipped with steel plate 16 on the polyfluortetraethylene plate 15.The structure of second slideway 4 is identical with the structure of first slideway 2.
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, the mounting method of post tensioned prestressed concrete box girders, it comprises the steps:
1) installation of bracing or strutting arrangement:
Bracing or strutting arrangement comprises first bracing frame 1, first slideway 2, second bracing frame 3, second slideway 4;
In a case beam is installed span, lay first bracing frame 1 and second bracing frame 3 along the direction that post tensioned prestressed concrete box girders (abbreviation prefabricated case beam) is installed, first bracing frame 1 is parallel with second bracing frame 3, on first bracing frame 1, lay first slideway 2, on second bracing frame 3, lay second slideway 4, first slideway 2 is parallel with second slideway 4, and the spacing between first slideway 2 and second slideway 4 is less than the width (being that post tensioned prestressed concrete box girders 5 can be shelved on first slideway 2, second slideway 4) of post tensioned prestressed concrete box girders 5 bottom surfaces;
Concrete steps are:
1. preparation: suspender (snap ring, wire rope etc.) and tensioner are prepared; The examination of cementitious materials is joined with safety technics and is told somebody what one's real intentions are; Ground is handled: surperficial loose ground is removed in the backfill zone, changes the aggregate grading material compacting of filling out 500～800mm, the plain concrete sealing that 50～100mm is thick, and the thick iron plate of 10mm is spread on the surface; Original state ground will be adjusted to graded sand and stone on the same absolute altitude face to surperficial absolute altitude in length and breadth, and concrete thickness depends on the circumstances; Concrete surface is received light and is formed the gradient, must not ponding;
2. the laying of first bracing frame 1 and second bracing frame 3: in a case beam is installed span, longitudinally lay left sleeper row, right sleeper row (constituting the basis of second bracing frame 3, first bracing frame 1), left sleeper row is parallel with right sleeper row; Each sleeper row's sleeper 6 and the spacing between the sleeper 6 are 600mm; The length and width of sleeper 6, the thick 2500mm*250mm*250mm that is of a size of;
Along laterally all establishing 7 following adjusting screw mandrels 7, the spacing of the following adjusting screw mandrel 7 on the same sleeper is 300mm on sleepers 6 all on left sleeper row and the right sleeper row;
In the upper end of all vertical rods 9 adjusted screw mandrel 10 is set;
On the adjusted screw mandrel 10 that is positioned at above the same sleeper, lay horizontal i iron 11 again; Form first bracing frame 1 and second bracing frame 3;
3. on the horizontal i iron 11 of first bracing frame 1, longitudinally lay vertical i iron 13 of first slideway 2, on the horizontal i iron 11 of second bracing frame 3, longitudinally lay vertical i iron 13 of second slideway 4;
At the upper surface spot welding corrosion resistant plate 14 of vertical i iron 13, lay polyfluortetraethylene plate 15 as slide plate at the upper surface of corrosion resistant plate 14, on polyfluortetraethylene plate 15, lay steel plate 16;
Vertical i iron 13 of first slideway 2 is parallel with vertical i iron 13 of second slideway 4, and the spacing between vertical i iron 13 of the vertical i iron 13 of first slideway 2 and second slideway 4 is less than the width of post tensioned prestressed concrete box girders 5 bottom surfaces; Form bracing or strutting arrangement;
2) installation of post tensioned prestressed concrete box girders:
1. adopting hoisting weight is that the 100t straddle truck is placed on the handling of 4-10 piece post tensioned prestressed concrete box girders on first slideway 2 and second slideway 4 of bracing or strutting arrangement, has the end face cleaning of shear connector clean post tensioned prestressed concrete box girders;
2. by bottle gouard moved by hands post tensioned prestressed concrete box girders 5 is walked on first slideway 2 and second slideway 4, one end of bottle gouard moved by hands ties up on the post tensioned prestressed concrete box girders that has fixed, the other end of bottle gouard moved by hands ties up on the post tensioned prestressed concrete box girders that promptly will move, and two adjacent post tensioned prestressed concrete boxes are carried out assembly unit;
Before matching fully, corresponding convex-concave two sides carries out the brushing work of epoxy resin; Because of the brushing that will carry out epoxy resin between the every beam, when using epoxy resin, from be brushed to be bonded together till, must in official hour, finish (smaller or equal to 2 hours), and concrete surface to keep dry state; Serviceability temperature is 5 ℃-30 ℃, as surpassing 30 ℃, allows to shorten greatly service time, also is difficult to use, so must use as early as possible behind the mix; During brushwork epoxy resin, generally use rubber brush, manually wear Rubber gloves and smear, paint thickness (the consumption 1.5Kg/m that is advisable about with 1mm
2); Therefore a mix amount should suitably be controlled according to the brushing progress at scene; Epoxy resin tries not to adhere on the skin during use; If be stained with on the skin, use cloth and wipe or solvent scouring;
So far, finished the installation of post tensioned prestressed concrete box girders.
Said method makes full use of exactly to be set up dismounting bowl button frame is as support system (i.e. first bracing frame and second bracing frame) flexibly, easily, on the bracing frame of having set up, slideway is installed, adopt hoisting weight to be placed on first slideway and second slideway, by bottle gouard moved by hands post tensioned prestressed concrete box girders is walked on slideway then for the 100t straddle truck carries out handling precast concrete case beam.Use said method that post tensioned prestressed concrete box girders is installed, can reduce cost (this method cost is low), bracing frame is set up dismounting flexibly, conveniently, and has comprehensive technology economic benefit (economic benefit, social benefit and environmental benefit are obvious) preferably.Solved the technical barrier that post tensioned prestressed concrete box girders also can be walked without straddle truck on slideway.
Claims (2)
1. be used for the bracing or strutting arrangement that post tensioned prestressed concrete box girders is installed, it is characterized in that it comprises first bracing frame (1), first slideway (2), second bracing frame (3), second slideway (4); First bracing frame (1) and second bracing frame (3) are laid on a case beam and install in the span, and first bracing frame (1) and second bracing frame (3) are all arranged along the direction that post tensioned prestressed concrete box girders is installed, first bracing frame (1) is parallel with second bracing frame (3), be equipped with first slideway (2) on first bracing frame (1), be equipped with second slideway (4) on second bracing frame (3), first slideway (2) is parallel with second slideway (4), and the spacing between first slideway (2) and second slideway (4) is less than the width of post tensioned prestressed concrete box girders (5) bottom surface.
2. the bracing or strutting arrangement that is used for the post tensioned prestressed concrete box girders installation according to claim 1 is characterized in that described first slideway (2) comprises vertical i iron (13), corrosion resistant plate (14), polyfluortetraethylene plate (15) and steel plate (16); Vertically the upper surface point of i iron (13) is welded with corrosion resistant plate (14), and the upper surface of corrosion resistant plate (14) is equipped with polyfluortetraethylene plate (15), is equipped with steel plate (16) on the polyfluortetraethylene plate (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202636485U CN201857576U (en) | 2010-07-21 | 2010-07-21 | Supporting device for installing post-tensioned precast prestressed concrete box girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202636485U CN201857576U (en) | 2010-07-21 | 2010-07-21 | Supporting device for installing post-tensioned precast prestressed concrete box girder |
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| Publication Number | Publication Date |
|---|---|
| CN201857576U true CN201857576U (en) | 2011-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202636485U Expired - Fee Related CN201857576U (en) | 2010-07-21 | 2010-07-21 | Supporting device for installing post-tensioned precast prestressed concrete box girder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105155422A (en) * | 2015-09-15 | 2015-12-16 | 中国一冶集团有限公司 | Method for controlling pre-camber and pre-offsetting during mounting of post-tensioning precast prestressed concrete box girders |
-
2010
- 2010-07-21 CN CN2010202636485U patent/CN201857576U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105155422A (en) * | 2015-09-15 | 2015-12-16 | 中国一冶集团有限公司 | Method for controlling pre-camber and pre-offsetting during mounting of post-tensioning precast prestressed concrete box girders |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110608 Termination date: 20170721 |
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| CF01 | Termination of patent right due to non-payment of annual fee |