CN206090327U - Big interim tensioning anchorage supporting device of cantilever bent cap - Google Patents
Big interim tensioning anchorage supporting device of cantilever bent cap Download PDFInfo
- Publication number
- CN206090327U CN206090327U CN201621123936.4U CN201621123936U CN206090327U CN 206090327 U CN206090327 U CN 206090327U CN 201621123936 U CN201621123936 U CN 201621123936U CN 206090327 U CN206090327 U CN 206090327U
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- cap
- screw
- bent cap
- cushion cap
- buried
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Abstract
The utility model provides a big interim tensioning anchorage supporting device of cantilever bent cap, including locating the pre -buried circular steel tube of bent cap on the large -span bent cap, locate the pre -buried circular steel tube of cushion cap on the cushion cap, and save precision rolling deformed steel bars through a plurality of standards that screw thread steel sleeve connects, pre -buried circular steel tube of bent cap and the pre -buried circular steel tube of cushion cap correspond the setting in the position from top to bottom, a plurality of standard festival precision rolling deformed steel bars connect gradually and form the screw steel column, the pre -buried circular steel tube of bent cap is passed to the upper end of screw steel column, the screw -thread steel backing plate is used in proper order to the end, screw thread steel washer, the screw -thread steel nut is fixed, the pre -buried circular steel tube of lower extreme screw in cushion cap of screw steel column is fixed. The utility model discloses a construction flow is few, and the method is simple. Only need to make when pouring bent cap and cushion cap pre -buried, use when a bridge crane is about to target in place a small amount of artifical installation precision rolling deformed steel bars can, compare and can save a large amount of personnel and equipment input in other construction methods, application scope extensively.
Description
Technical field
This utility model is related to Summarized Account of Bridge Erection Construction technical field, the specifically interim stretch-draw anchor suspension device of great cantilever bent cap.
Background technology
In the erecting beam construction of city, the road network complicated in order to adapt to city, the setting of pier stud can not often be evenly distributed.
In crossing region in order to not isolate existing highway, generally require to arrange the bridge of large span, and due to the design of bridge structure
Limit, the length of box beam needs to be consistent, therefore generates the bent cap structure of large span.
For standard across set up Bridge Erector set up these large spans box beam when, supporting leg can be stood in large span bent cap
Cantilever segment, can cause huge moment of flexure and exceed its structural strength to bent cap and pier stud.Solution general at present is in frame
The underface of the main supporting leg of bridge machine arranges temporary rest pier.Load when girder erection by bridging machine is passed through into temporary rest pier using the program
Ground is directly delivered to, moment of flexure will not be produced to pier stud, while bent cap is subjected only to normal pressure, preferably resolving Bridge Erector is carried out
The problem of Precast Concrete Segmental Bridges box beam erection at large span bent cap.
But both need to process using above-mentioned temporary rest pier scheme or lease temporary rest pier, it is also desirable to temporary rest pier is entered
Row is set up, dismantles, will be herein one than larger cost payout, while also tending to become the control set a roof beam in place in work
Property engineering.
Utility model content
For deficiencies of the prior art, this utility model provides a kind of great cantilever bent cap interim stretch-draw anchor
Protection unit, replaces the larger temporary support of the scale of construction using fining twisted steel, and construction process is few, and method is simple.
The interim stretch-draw anchor suspension device of a kind of great cantilever bent cap, including the pre-buried round steel of bent cap on large span bent cap
Pipe, the pre-buried round steel pipe of the cushion cap on cushion cap and the multiple standard knot fining twisted steels by screw-thread steel sleeve connection, lid
The pre-buried round steel pipe of beam is correspondingly arranged with the pre-buried round steel pipe upper-lower position of cushion cap, and multiple standard knot fining twisted steels are in turn connected to form
Screw thread steel column, the upper end of screw thread steel column pass through the pre-buried round steel pipe of bent cap, termination successively using screw thread billet, screw thread steel washer,
Screw-thread steel nut is fixed, and the lower end of screw thread steel column screws in the pre-buried round steel pipe of cushion cap and fixes.
Further, the lower loop of the pre-buried round steel pipe of cushion cap is arranged with spiral busting reinforcement, the bottom of spiral busting reinforcement
Cushion cap Pressure-bearing pads are provided with, spiral busting reinforcement and cushion cap Pressure-bearing pads are used to prevent concrete from rupturing during stress.
Further, clamp nut is welded with cushion cap Pressure-bearing pads, the lower end of screw thread steel column passes through the pre-buried round steel of cushion cap
Clamp nut is screwed in after pipe.
Further, cushion cap Pressure-bearing pads are also welded with the clamp nut protection cap protected to clamp nut, fastening
Nut protection cap is located at clamp nut bottom.
This utility model is held bent cap mode using interim screw-thread steel and replaces the mode that temporary rest pier props up bent cap to construct stream
Journey is few, installs simple, and material therefor is few, it is only necessary to carry out when bent cap and cushion cap is poured it is pre-buried, Bridge Erector will in place when make
With a small amount of manually installed fining twisted steel, substantial amounts of personnel and equipment investment can be saved compared to other construction methods, no
Only effect is high, and cost is low compared with using temporary rest pier, and especially under the operating mode of high pier stud, its advantage is particularly evident.
Description of the drawings
Fig. 1 is the structural representation of the interim stretch-draw anchor suspension device of this utility model great cantilever bent cap；
Fig. 2 is the pre-buried and reserved schematic diagram on this utility model bent cap；
Fig. 3 is the pre-buried and reserved schematic diagram on this utility model cushion cap；
Fig. 4 is the structural representation of this utility model fining twisted steel；
Fig. 5 is the construction schematic diagram that prior art uses temporary rest pier.
In figure：1-piece of having set a roof beam in place, 2-bridge formation owner's supporting leg, 3-large span bent cap, 4-pier stud, 5-great cantilever bent cap
Interim stretch-draw anchor suspension device, 6-cushion cap, the pre-buried round steel pipe of 7-bent cap, the pre-buried round steel pipe of 8-cushion cap, 9-rubber closure,
10-spiral busting reinforcement, 11-cushion cap Pressure-bearing pads, 12-clamp nut, 13-clamp nut protection cap, 14-screw-thread steel
Backing plate, 15-screw thread steel washer, 16-adjust section fining twisted steel, 17-screw-thread steel nut, 18-screw-thread steel sleeve, 19-mark
Quasi- section fining twisted steel, 20-temporary rest pier.
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model, the technical scheme in this utility model is carried out clearly and completely
Description.
Fig. 1 is the box beam using the interim stretch-draw anchor suspension device of this utility model great cantilever bent cap 5 to large span bent cap 3
Erection carries out the arrangement schematic diagram of gib, it can be seen that the interim stretch-draw anchor supporting dress of the great cantilever bent cap
Put 5 setting it is not full symmetric with 2 positions of bridge formation owner supporting leg, so arrange purpose be for the position with bottom cushion cap 6
Put and be adapted while taking into account bridge formation owner supporting leg 2 and load condition of the piece 1 to the applying of large span bent cap 3 of having set a roof beam in place.Great cantilever lid
The set location of the interim stretch-draw anchor suspension device of beam 5 should be determined by calculating according to the difference of project.
Fig. 2 shows the pre-buried and reserved arrangement on large span bent cap 3.Anchor great cantilever bent cap is determined according to above-mentioned calculating
After the diameter of the screw-thread steel of interim stretch-draw anchor suspension device 5 and position, when large span bent cap 3 is constructed, relevant position is buried
If the pre-buried round steel pipe 7 of bent cap, the diameter 10mm bigger than fining twisted steel diameter of the pre-buried round steel pipe of bent cap 7, so as to fining twisted steel
Install.
Fig. 3 shows the pre-buried and reserved arrangement on cushion cap 6.The interim tensioning of great cantilever bent cap is determined according to above-mentioned calculating
After the diameter of the screw-thread steel of anchoring support device 5 and position, when cushion cap 6 is constructed, relevant position and respective depth are buried and are held
The pre-buried round steel pipe 8 of platform, rubber closure 9, spiral busting reinforcement 10, cushion cap Pressure-bearing pads 11, clamp nut 12, clamp nut protection cap
13.The pre-buried round steel pipe 8 of cushion cap is similar with the pre-buried round steel pipe 7 of bent cap, its diameter 10mm bigger than fining twisted steel diameter.Rubber closure 9
Pre-buried round steel pipe 8 is protected after completing for the construction of cushion cap 6, prevent debris from entering.Spiral busting reinforcement 10 and cushion cap
The effect of Pressure-bearing pads 11 is to prevent concrete from rupturing during stress.Clamp nut 12 is welded on cushion cap pressure-bearing pad
On plate 11, fining twisted steel is screwed in into 12 suitable length of clamp nut when needing to install fining twisted steel.Clamp nut
Protection cap 13 is also welded on cushion cap Pressure-bearing pads 11, and clamp nut 12 is protected, and prevents coagulation in 6 casting process of cushion cap
Soil enters destruction screw thread.
Fig. 4 shows the connection between fining twisted steel, and screw-thread steel is arranged using modularity, by adjustment criteria section finish rolling
The combination of 19 different length of screw-thread steel can meet the bent cap demand of differing heights.The fining twisted steel at 3 end of large span bent cap makes
3 top of large span bent cap is fixed on screw thread billet 14, screw thread steel washer 15, screw-thread steel nut 17.Standard knot finish rolling screw thread
It is attached by screw-thread steel sleeve 18 between steel 19.To the fining twisted steel that installs using hydraulic jack tensioning to setting
Evaluation, makes screw-thread steel and the advance stress of dependent Concrete structure.
Fig. 5 is the schematic diagram that prior art carries out equal operating mode construction using temporary rest pier 20.It can be seen that making
Need to set up the huge temporary rest pier of the scale of construction with temporary rest pier, waste time and energy.And use the interim stretch-draw anchor of this great cantilever bent cap
Suspension device 5 only needs to carry out achieving the goal by simple pre-buried and screw-thread steel is installed, and saves substantial amounts of manpower and materials and duration.
This utility model holds bent cap in the correct position of bridge formation owner's supporting leg strong point pier stud offside, makes large span bent cap
Symmetrical stress, so as to eliminate the moment of flexure to pier stud, it is ensured that structure stress safety.Only need in bent cap and hold using fining twisted steel
Carry out suitably reserving and pre-buried on platform, reaching in Bridge Erector needs the long bent cap constructed to be installation fining twisted steel, according to design
Value carries out tensioning, specific as follows：
1st, screw-thread steel design
Using screw-thread steel (UTS=1030Mpa) totally 16 pulling bent caps of a diameter of 32mm, elastic modelling quantity is 170*
103N/mm2, screw-thread steel overall length are 25m, and every screw-thread steel force value of pre- tensioning is 210kN.
1.1 calculate screw thread hardness of steel
In erection process, as bent cap receives eccentric load, pulling force increase suffered by interim screw-thread steel is made, in peak load feelings
Under condition, in erection process, screw-thread steel Strength co-mputation process is as follows：
Screw-thread steel prestressing force
F1=210*0.9=189kN (considers 10% loss of tension)
As bent cap skew causes screw-thread steel elongation 29mm, increased pulling force it is：
Screw-thread steel institute stress is：
F=F1+F2=347kN<0.75UTS=620kN
Therefore intensity meets requirement.
1.2 cushion cap shear calculations
Pre-buried back plate sizes are 180mm*180mm*40mm, bury and are upgraded to 750mm, then suffered by cushion cap, screw-thread steel shear stress is：
Therefore cushion cap shearing resistance meets requirement.
Analyzed by above-mentioned calculating, bent cap mode is held using interim screw-thread steel and replaces temporary rest pier to prop up the mode of bent cap
Feasible, which installs simple, and material therefor is few, only need on bent cap and cushion cap preformed hole and nut, then by spiral shell
Stricture of vagina steel makes bent cap and cushion cap anchoring, and not only effect is high, and cost is low compared with using temporary rest pier, especially in the operating mode of high pier stud
Under, its advantage is particularly evident.The method is applicable not only to bent cap of encorbelmenting herein, needs what is propped up using buttress there is eccentric load
In the case of, the mode of " change and support to draw " is adopted, unexpected effect is played sometimes.
The construction method of the interim stretch-draw anchor suspension device of this utility model great cantilever bent cap, comprises the steps：
Step one, bent cap pre-buried round steel pipe 7 is formed in the pre-buried round steel pipe of design attitude when large span bent cap 3 is poured,
The pre-buried round steel pipe in pre-buried 7 position of round steel pipe of correspondence bent cap, Pressure-bearing pads when cushion cap 6 is poured, it is pre-buried that screw-thread steel nut forms cushion cap
Round steel pipe 8；
Step 2, multiple standard knot fining twisted steels 19 are in turn connected to form screw thread steel column, and the upper end of screw thread steel column passes through
The pre-buried round steel pipe 7 of bent cap, termination are fixed using screw thread billet 16, screw thread steel washer 15, screw-thread steel nut 17 successively, screw-thread steel
The lower end of post screws in the pre-buried round steel pipe of cushion cap 8 and fixes.
Wherein, clamp nut 12 is welded with cushion cap Pressure-bearing pads 11, the lower end of screw thread steel column passes through the pre-buried circle of cushion cap
Clamp nut 12 is screwed in after steel pipe 8.
The demounting procedure of said apparatus is：After Bridge Erector construction is finished, the screw-thread steel spiral shell on large span bent cap 3 is dismantled first
Female 17, then dismantle standard knot fining twisted steel 19 successively from top to down, and screw out the screw-thread steel on cushion cap 6, finally using nothing
Shrinkage grouting filler blocks the hole of cushion cap 6 and large span bent cap 3.
Claims (4)
1. the interim stretch-draw anchor suspension device of a kind of great cantilever bent cap, it is characterised in that：Including on large span bent cap (3)
The pre-buried round steel pipe of bent cap (7), the pre-buried round steel pipe of the cushion cap (8) on cushion cap (6), and by screw-thread steel sleeve (18) connect
Multiple standard knot fining twisted steels (19), the pre-buried round steel pipe of bent cap (7) is corresponding with cushion cap pre-buried round steel pipe (8) upper-lower position to be set
Put, multiple standard knot fining twisted steels (19) are in turn connected to form screw thread steel column, the upper end of screw thread steel column passes through the pre-buried circle of bent cap
Steel pipe (7), termination are fixed using screw thread billet (16), screw thread steel washer (15), screw-thread steel nut (17) successively, screw thread steel column
To screw in the pre-buried round steel pipe (8) of cushion cap fixed for lower end.
2. the interim stretch-draw anchor suspension device of great cantilever bent cap as claimed in claim 1, it is characterised in that：The pre-buried round steel of cushion cap
The lower loop of pipe (8) is arranged with spiral busting reinforcement (10), and the bottom of spiral busting reinforcement (10) is provided with cushion cap Pressure-bearing pads
(11), spiral busting reinforcement (10) and cushion cap Pressure-bearing pads (11) are for preventing concrete from rupturing during stress.
3. the interim stretch-draw anchor suspension device of great cantilever bent cap as claimed in claim 2, it is characterised in that：Cushion cap Pressure-bearing pads
(11) clamp nut (12) is welded with, the lower end of screw thread steel column screws in clamp nut afterwards through the pre-buried round steel pipe of cushion cap (8)
(12)。
4. the interim stretch-draw anchor suspension device of great cantilever bent cap as claimed in claim 3, it is characterised in that：Cushion cap Pressure-bearing pads
(11) the clamp nut protection cap (13) protected to clamp nut (12) is also welded with, clamp nut protection cap (14) is located at
Clamp nut (12) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621123936.4U CN206090327U (en) | 2016-10-14 | 2016-10-14 | Big interim tensioning anchorage supporting device of cantilever bent cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621123936.4U CN206090327U (en) | 2016-10-14 | 2016-10-14 | Big interim tensioning anchorage supporting device of cantilever bent cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206090327U true CN206090327U (en) | 2017-04-12 |
Family
ID=58483988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621123936.4U Withdrawn - After Issue CN206090327U (en) | 2016-10-14 | 2016-10-14 | Big interim tensioning anchorage supporting device of cantilever bent cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206090327U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106436583A (en) * | 2016-10-14 | 2017-02-22 | 中铁十局集团有限公司 | Large-cantilever bent cap tensioning anchorage temporary support device and construction method thereof |
-
2016
- 2016-10-14 CN CN201621123936.4U patent/CN206090327U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106436583A (en) * | 2016-10-14 | 2017-02-22 | 中铁十局集团有限公司 | Large-cantilever bent cap tensioning anchorage temporary support device and construction method thereof |
| CN106436583B (en) * | 2016-10-14 | 2019-02-19 | 中铁十一局集团有限公司 | A kind of interim stretch-draw anchor suspension device of great cantilever bent cap and its construction method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170412 Effective date of abandoning: 20190219 |