CN205676784U - Bracket reverse drawing loads prepressing device - Google Patents
Bracket reverse drawing loads prepressing device Download PDFInfo
- Publication number
- CN205676784U CN205676784U CN201620541537.3U CN201620541537U CN205676784U CN 205676784 U CN205676784 U CN 205676784U CN 201620541537 U CN201620541537 U CN 201620541537U CN 205676784 U CN205676784 U CN 205676784U
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- CN
- China
- Prior art keywords
- support stringer
- upper support
- strut beam
- bracket
- lower support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 238000011068 loading method Methods 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 238000004080 punching Methods 0.000 claims description 9
- 230000002787 reinforcement Effects 0.000 claims description 4
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000004576 sand Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000012669 compression test Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000012407 engineering method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
nullThe utility model relates to field of bridge construction，It is specially a kind of bracket reverse drawing and load prepressing device，Solve the problem that two kinds of methods that existing bracket precompressed used all exist respective defect，Including stretching end、Fixing end，Connected by steel strand wires between stretching end and fixing end，Fixing end structure comprises the lower support stringer that longitudinal direction interval is laid bottom pier shaft，On lower support stringer, space-stop rack is provided with strut beam in transverse direction，Strut beam is spaced above lays the upper support stringer be arrangeding in parallel with lower support stringer，Upper support stringer is fixedly arranged above weighted platform，Lower support stringer、Strut beam、Upper support stringer and weighted platform are welded as a whole composition loading frame，It is stacked with loading reinforcing bar on loading frame，Steel strand wires lower end sequentially passes through loading reinforcing bar、Weighted platform、Upper support stringer、With strut beam lower anchor after strut beam，Substantially reduce the precompressed cycle，Reduce construction cost，And it is workable、Safe and reliable，Produce a desired effect.
Description
Technical field
The utility model relates to field of bridge construction, is specially a kind of bracket reverse drawing and loads prepressing device.
Background technology
Along with economic quick growth, the infrastructure construction of China also former speed development not having, wherein
Including a large amount of bridge engineering construction projects, and continuous beam and continuous rigid frame bridge are widely used a kind of bridge structure forms.Even
No. 0 section of continuous beam pier coping portion is the basis of later stage cantilever construction, and generally mass concrete is cast-in-place forms, and it is arranged
The bearing capacity of bracket most important, it is therefore necessary to carrying out precompressed to bracket, eliminating inelastic deformation, measurement is at equivalent load
Elastic deformation situation under active force, to check the stability of whole bracket.
Traditional method is the heavy duty such as preloading sand pocket or prefabricated section precompressed on bracket, and its pile area is relatively big, pile is high
Spend higher, observation station is arranged and survey crew's observation brings very big difficulty, it is difficult to ensure that the degree of accuracy of observation data, certainly will
Can affect precompressed result, and the piling prepressing on bracket such as sand pocket or prefabricated section, need sand loading bag or make pre-under pier in advance
Clamp dog, then lifts, and operating efficiency is relatively low.Still an alternative is that prestressing force reverse drawing preloading method, usual structure bag
Including punching jack and steel strand wires, punching jack is laid in bridge pier two lateral bracket top, steel strand wires upper end and punching jack
Connecting, the lower end of steel strand wires is anchored in cushion cap by anchorage, before the concrete pouring cushion cap, passes through steel strand wires tail end solid
Determining plate and being fastened and fixed with anchorage, four dowels and matching nut are installed in synchronization, bury after-pouring in place underground according to design attitude and hold
Platform concrete.Hydraulic pressure punching jack, when stretch-draw, is loaded by the method according to design load classification, and jack tension steel twists
Line, the reaction force of stretch-draw passes to bracket, owing to steel strand wires anchoring lower ends is in cushion cap, causes unpredictable damage to cushion cap
Wound, and add bearing platform construction difficulty, additionally, in precompressed stretching process, carry out jack according to design load classification
Loading, precompressed weight can only be controlled by jack, and manual operation jack exists maloperation risk, and reverse drawing steel strand wires exist
Easily there is risk of breakage under artificial incorrect operation.
Content of the invention
All there is the problem of respective defect in two kinds of methods that the utility model is used in order to solve existing bracket precompressed, carries
Load prepressing device for a kind of bracket reverse drawing.
The utility model adopts the following technical scheme that realization: bracket reverse drawing loads prepressing device, including be positioned at bracket
Top, the stretching end that is made up of punching jack and strut-beam, also comprise to be positioned at the fixing end above cushion cap, stretching end and fixing
Being connected by steel strand wires between end, innovative point of the present utility model is that fixing end structure comprises bottom pier shaft between longitudinal direction
Every the lower support stringer laid, on lower support stringer, space-stop rack is provided with strut beam in transverse direction, strut beam laying spaced above
The upper support stringer be arrangeding in parallel with lower support stringer, upper support stringer is fixedly arranged above weighted platform, lower support stringer, pressure-bearing
Beam, upper support stringer and weighted platform are welded as a whole composition loading frame, and loading frame is stacked with loading reinforcing bar, steel strand wires
Lower end sequentially pass through loading reinforcing bar, weighted platform, upper support stringer, after strut beam with strut beam lower anchor.
The described reinforcing bar outside spacers that loads is provided with the vertical block reinforcement bar with loading frame welding, further ensures that loading steel
Muscle is stacked safe and reliable.
Described upper support stringer is all that the Two bors d's oeuveres I-steel together with being placed in parallel is constituted with lower support stringer, fully
Utilize the architectural characteristic of I-steel, further enhance structural stability and the holding capacity of overall loading frame.
Use structure of the present utility model to design, No. 0 block bracket precompressed is used to the side of steel strand wires reverse drawing test under pier
Load during formula construction simulation is in bracket jacking row precompressed, compared with the precompressed construction such as this prepressing device and conventional employing sand pocket
Relatively, there is following feature:
1st, loading frame is welded by weighted platform, upper support stringer, strut beam and lower support stringer, and is placed on
On cushion cap, the lower end of steel strand wires and loading frame bottom anchor, it is to avoid the damage to cushion cap, reduce difficulty of construction；
2nd, employing carries out reinforcing bar loading precompressed under pier, carries out precompressed by 120 excess loads of beam deadweight to bracket, loads
Quickly and easily, the numerical value that punching jack loads is relatively accurate for load process, can No. 0 block casting process of realistic simulation, have for
Property carry out loading precompressed to bracket, prepare shorter to the precompressed deadline from arranging, the precompressed cycle can be shortened；
3rd, observation station is easy to arrange, and measurement and operating personnel operating space compared with big, sight line is penetrating, further ensure that
The accuracy of observation data, simultaneously facilitates and checks bracket, highly beneficial in terms of bracket precompressed quality assurance；
4th, the precompressed cycle is 2.5d, and the heavy duty precompressed cycle such as traditional preloading sand pocket or prefabricated section is 7d, passes with conventional
The precompressed engineering method of system is compared, and substantially reduces the precompressed cycle；
5th, use and under pier, carry out reinforcing bar load precompressed, largely decrease the security risk of preloading lifting, carry
High job safety coefficient；
6th, using preloading under pier, steel are directly transported to job site by steel factory, there is not material secondary and fall to use the time,
Truck crane is used to winch under pier, hand fit's pile, lift steel about 250t every day, operating efficiency is high；
7th, use steel piling prepressing under pier, take up room less, reduce labour intensity, will not produce discarded simultaneously
Thing, thus without to environment, beneficially environmental protection；
In a word, use prepressing device of the present utility model, substantially reduce the precompressed cycle, reduce construction cost, and can
Strong operability, safe and reliable, produce a desired effect, be that the construction of follow-up sections provides effective technical parameter.
Brief description
Fig. 1 is structural representation of the present utility model；
In figure: 1-bracket；2-punching jack；3-strut-beam；4-cushion cap；5-steel strand wires；6-pier shaft；Support vertical under 7-
Beam；8-strut beam；The upper support stringer of 9-；10-loads reinforcing bar；11-vertical block reinforcement bar；12-stretching end；The fixing end of 13-；14-adds
Carrying platform.
Detailed description of the invention
Bracket reverse drawing loads prepressing device, as it is shown in figure 1, include being positioned above bracket 1, by punching jack 2 and pressurized
The stretching end that beam 3 is constituted, also comprises to be positioned at the fixing end above cushion cap 4, between stretching end and fixing end by steel strand wires 5 even
Connecing, fixing end structure comprises the lower support stringer 7 that longitudinal direction interval is laid bottom pier shaft 6, on lower support stringer transversely
Direction space-stop rack is provided with strut beam 8, and strut beam is spaced above lays the upper support stringer 9 be arrangeding in parallel with lower support stringer, on
Support stringer is fixedly arranged above weighted platform 14, and lower support stringer, strut beam, upper support stringer and weighted platform are welded as a whole
Constitute loading frame, loading frame is stacked with loading reinforcing bar 10, steel strand wires lower end sequentially pass through loading reinforcing bar, weighted platform,
With strut beam lower anchor after upper support stringer, strut beam.
Load reinforcing bar 10 outside spacers and be provided with the vertical block reinforcement bar 11 with loading frame welding, use I25 I-steel.Upper
Support longeron 9 is all that the Two bors d's oeuveres I-steel together with being placed in parallel is constituted with lower support stringer 7, all uses I25 I-steel.
During Specific construction, the required reinforcing bar that loads of precompressed is transported directly to job site by steel factory, uses truck crane to coordinate
Artificial lifting pile, must ensure that the preloading synchronization of pier shaft both sides is carried out, and unbalanced weight must not exceed 10t；Structure shape according to bracket
Formula, calculates through hypothesized model, and counter-force point is arranged on bracket cantilever end and is rational position at root 1.5m；Observation clicks
Selecting at the root of master carrier and cantilever end, two cantilever ends are arranged symmetrically with；Squeeze time and loading method determine: the pre-compression test phase is
Reinforcing bar preloading 2d under 2.5d, i.e. pier, stretch-draw pre-compression test 0.5d, use symmetry to load in batches, and every 30min loads once, in the first batch
Loading total amount is the 60% of gross weight, later batch add up loaded weight be gross weight the 80%th, the 100%th, 120% until having loaded
Become.
Claims (3)
1. bracket reverse drawing loads a prepressing device, including be positioned at bracket (1) top, by punching jack (2) and strut-beam (3)
The stretching end (12) constituting, is also comprised the fixing end (13) being positioned at cushion cap (4) top, is twisted by steel between stretching end and fixing end
Line (5) connects, and it is characterized in that fixing end structure comprises the lower support stringer (7) laid along longitudinal direction interval, pier shaft (6) bottom,
On lower support stringer, space-stop rack is provided with strut beam (8) in transverse direction, and strut beam laying spaced above is parallel with lower support stringer
The upper support stringer (9) arranging, upper support stringer is fixedly arranged above weighted platform (14), lower support stringer, strut beam, upper support
Longeron and weighted platform are welded as a whole composition loading frame, and loading frame is stacked with loading reinforcing bar (10), steel strand wires lower end
Sequentially pass through loading reinforcing bar, weighted platform, upper support stringer, after strut beam with strut beam lower anchor.
2. bracket reverse drawing according to claim 1 loads prepressing device, it is characterized in that loading reinforcing bar (10) outside spacers sets
There is the vertical block reinforcement bar (11) with loading frame welding.
3. bracket reverse drawing according to claim 1 and 2 loads prepressing device, it is characterized in that upper support stringer (9) and lower
Support longeron (7) is all to be made up of the Two bors d's oeuveres I-steel being placed in parallel together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620541537.3U CN205676784U (en) | 2016-06-07 | 2016-06-07 | Bracket reverse drawing loads prepressing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620541537.3U CN205676784U (en) | 2016-06-07 | 2016-06-07 | Bracket reverse drawing loads prepressing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205676784U true CN205676784U (en) | 2016-11-09 |
Family
ID=57434694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620541537.3U Expired - Fee Related CN205676784U (en) | 2016-06-07 | 2016-06-07 | Bracket reverse drawing loads prepressing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205676784U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109208488A (en) * | 2018-10-24 | 2019-01-15 | 中国水利水电第八工程局有限公司 | A kind of the high pier prepressing device and its construction method of high idle pattern ballast |
| CN114108488A (en) * | 2021-12-19 | 2022-03-01 | 中铁四局集团路桥工程有限公司 | Reverse-pulling construction method for thin-wall pier ultrahigh ultra-wide extra-heavy 0# block bracket |
| CN116464093A (en) * | 2020-12-31 | 2023-07-21 | 中交路桥华南工程有限公司 | Counterweight bearing platform and counterweight pier |
-
2016
- 2016-06-07 CN CN201620541537.3U patent/CN205676784U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109208488A (en) * | 2018-10-24 | 2019-01-15 | 中国水利水电第八工程局有限公司 | A kind of the high pier prepressing device and its construction method of high idle pattern ballast |
| CN116464093A (en) * | 2020-12-31 | 2023-07-21 | 中交路桥华南工程有限公司 | Counterweight bearing platform and counterweight pier |
| CN114108488A (en) * | 2021-12-19 | 2022-03-01 | 中铁四局集团路桥工程有限公司 | Reverse-pulling construction method for thin-wall pier ultrahigh ultra-wide extra-heavy 0# block bracket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20161109 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |