CN204715196U - A kind of cantilever casting beam abutment pier prestressed reinforcement device - Google Patents
A kind of cantilever casting beam abutment pier prestressed reinforcement device Download PDFInfo
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- CN204715196U CN204715196U CN201520350571.8U CN201520350571U CN204715196U CN 204715196 U CN204715196 U CN 204715196U CN 201520350571 U CN201520350571 U CN 201520350571U CN 204715196 U CN204715196 U CN 204715196U
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- pier
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- pier shaft
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- connecting reinforcement
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Abstract
The utility model discloses a kind of cantilever casting beam abutment pier prestressed reinforcement device, it comprises: be embedded in the finish rolling steel in pier shaft, and wherein, every root essence is pricked outside steel and is inserted in rubber bellows, and essence is pricked steel lower end and established mud jacking hole, and finish rolling steel stretching notch is established at pier shaft top; Pre-buried upper connecting reinforcement unit and lower connecting reinforcement unit, upper connecting reinforcement unit and lower connecting reinforcement unit are all transversely arranged, and are fixedly connected with finish rolling steel; The bracket of pier shaft side, this bracket is fixed by upper connecting reinforcement unit reinforcing bar and lower connecting reinforcement unit and pier shaft; With the bowl button support set up above bracket and laying template.The difficult problem such as unbalanced load when the utility model successfully solves Bracket method for construction end bay Cast-in-Situ Segment, for the extensive utilization of bracket construction creates condition, advanced technology, improves speed of application further, reduces personnel, the cost of machinery drops into.
Description
Technical field
The utility model belongs to field of bridge construction, is specifically related to a kind of easy rapid constructing method.
Background technology
Variable cross-section prestressed concrete continuous beam and continuous rigid frame bridge extensively adopt in highway engineering, railway engineering because it is comparatively large across footpath, road-ability is good, construction technology is ripe.The bridge of the type according to stressed and detailing requiments, has divided No. zero block, cantilever pouring section, end bay Cast-in-Situ Segment when designing.But owing to being located in, lofty mountains and steep hills, and physical features is precipitous, and its pier stud is relatively high, and most of continuous rigid frame bridge all exists access bridge, and Cast-in-Situ Segment is positioned in transition pier, causes Cast-in-Situ Segment distance ground level higher.Support Method and Bracket method two type is mainly contained when carrying out high pier end bay cast-in-place section construction.
The first: floor stand method.Adopt different rack forms according to the difference of pier shaft, set up scaffold when pier shaft height is within 20m to Cast-in-Situ Segment position, lay template shelf and template, complete that Cast-in-Situ Segment is concrete builds; When pier shaft height is more than 20m, adopt steel pipe support construction method, after Cast-in-Situ Segment infrastructure is hardened, welding large-scale steel pipe, steel pipe top lays spandrel girder and spreader beam, spreader beam is laid bed die and finally completes the concrete cast-in-place section construction of building of Cast-in-Situ Segment.
The end bay Cast-in-Situ Segment steeper for landform also can adopt steel concrete temporary rest pier construction method, digging hole filling pile must be set in Cast-in-Situ Segment bottom during construction, then temporary steel reinforced concrete pier shaft is built, support is laid at temporary rest pier top, then lay the bed die of Cast-in-Situ Segment, and complete concrete building.No matter the length of pier shaft height or Cast-in-Situ Segment, all can adopt the method to construct.The maximum feature of this construction method is exactly versatility, and weak point is that cost is higher.
The second: calf support method.Leave preformed groove when pier shaft or Coping Construction or directly pre-buried on i iron, i iron adopts diagonal brace to reinforce, and calf support one end arranges spreader beam and carries out the construction of Cast-in-Situ Segment after laying template.Relative to other engineering methods, calf support method economically considers it is more satisfactory.
But now bridge pier of highway bridge major part adopts reinforced concrete bridge pier, make pier shaft cross section comparatively gravity pier be much smaller, its ability of bearing unbalanced moment is more weak.When adopting Bracket method for construction, the unbalanced moment that the deadweight of end bay Cast-in-Situ Segment and working load produce pier shaft, than large many when becoming the bridge stage, as easy as rolling off a logly causes pier stud unbalance loading, causes pier stud generation crack, causes have a strong impact on pier shaft quality.For this problem, traditional method carries out water tank or prefabricated section counterweight to make whole pier shaft both sides keep balance in calf support opposition side, pier shaft is made to be in state of axial compression, thus ensure that pier shaft does not produce crack during cast-in-place section construction, but the making of water tank and prefabricated section and dismounting, will certainly increase operating expenses and extend the duration.
Utility model content
Main purpose of the present utility model is for background present situation situation, provides a kind of construction equipment of end bay Cast-in-Situ Segment of can constructing fast, economical.
The technical solution of the utility model is as follows:
A kind of cantilever casting beam abutment pier prestressed reinforcement device, is characterized in that, comprising:
Be embedded in the finish rolling steel in pier shaft, wherein, every root essence is pricked outside steel and is inserted in rubber bellows, and essence is pricked steel lower end and established mud jacking hole, and finish rolling steel stretching notch is established at pier shaft top;
Pre-buried upper connecting reinforcement unit and lower connecting reinforcement unit, upper connecting reinforcement unit and lower connecting reinforcement unit are all transversely arranged, and are fixedly connected with finish rolling steel;
The bracket of pier shaft side, this bracket is fixed by upper connecting reinforcement unit reinforcing bar and lower connecting reinforcement unit and pier shaft; With the bowl button support set up above bracket and laying template.
In preferred embodiment of the present utility model, fining twisted steel diameter is 30-40mm.
In preferred embodiment of the present utility model, finish rolling steel is arranged along pier shaft outside upright.
In preferred embodiment of the present utility model, finish rolling steel is provided with a row totally 5.
In preferred embodiment of the present utility model, also comprise jack and the hydraulic oil pump of pricking steel for the pre-buried pier shaft essence of stretch-draw.
In preferred embodiment of the present utility model, described jack and hydraulic oil pump are located at pier shaft top.
The utility model, by the pre-buried finish rolling deformed bar Shi Hanzhang of transition pier tension side, ensures that pier stud construction period pier shaft outermost edges does not produce tensile stress, to avoid the generation in crack, after the construction of end bay closure segment terminates, carries out putting a process.
In preferred embodiment of the present utility model, the finish rolling steel of pre-buried diameter 32mm during pier construction, uses and adopts YCQ60Q200 type jack and ZB type hydraulic oil pump to carry out stretch-draw and put a process.
In the utility model, because concrete anti-compression performance is much larger than examining tensile behavior, therefore before end bay closes up, steel construction prestressing force is pricked to the pre-buried essence of pier shaft, make pier shaft obtain a compressive stress in advance, so that the tensile stress produced during offset bracket method construction end bay Cast-in-Situ Segment.
In the utility model, after end bay closes up, prick steel to essence and put a process, i.e. release essence pricks steel prestressing force, makes essence prick steel and is in relaxed state, ensure that pier shaft does not change its stress performance when bridge completion state, meet designing requirement.
In the utility model, required plant equipment and material are building site common equipment, do not rely on the heavy mechanical equipment such as tower crane or mobile crane, and the human and material resources of input are less, reduce construction cost.
The utility model difficulty of construction is low, simple to operation, alleviates operating personnel's burden.
The utility model, for the defect in traditional end bay Cast-in-Situ Segment Bracket method for construction, creates a kind of construction equipment of Bracket method for construction end bay Cast-in-Situ Segment of economical and efficient.Compared to the prior art, the utility model possesses following advantage:
1, structure is simple: at the fining twisted steel of pier shaft pre-buried diameter 32mm during pier construction, before Cast-in-Situ Segment builds concrete, carry out stretch-draw, puts and open after closing up.
2, construct safer: be all operated in Dun Ding and complete, do not need workman to suspend construction in midair outside pier shaft, ensure construction safety.
3, operating expenses is low: do not need to hang a water tank (prefabricated section) in the opposition side of pier shaft bracket and carry out counterweight, also do not need large-scale tower crane or crane and water pump to assist, and saves the renting of main equipment, pacifies correlative chargess such as tearing open.And the utility model material requested and equipment market are conventional, and negligible amounts, total expense is low.
4, labor strength is low: difficulty of construction is low, simple to operation, and all operations completes by machinery, alleviates labor strength.
5, Technological adaptability is wide: this construction method is all applicable to all cantilever beam bridge end bay Cast-in-Situ Segment Bracket method for constructions.
Accompanying drawing explanation
Fig. 1 is that abutment pier reinforces elevation.
Fig. 2 is pier shaft cross-sectional view.
In figure
1 end bay Cast-in-Situ Segment
2 abutment piers
3 pre-buried finish rolling steel
4 brackets
5 rubber bellows
5-1 mud jacking hole
5-2 stretching notch
6 bowls of button supports
7 templates
Connecting reinforcement unit on 8
9 times connecting reinforcement unit
Detailed description of the invention
Specific embodiment of the utility model, a kind of cantilever casting beam abutment pier prestressed reinforcement device embodiment is as follows:
The first step: along with the finish rolling steel 3 of the pre-buried diameter 32mm of pier construction, finish rolling steel 3 is provided with a row totally 5 along pier shaft outside upright, is uniformly distributed.Wherein, every root essence is pricked outside steel 3 and is inserted in rubber bellows 5, and essence is pricked steel 3 lower end and established mud jacking hole 5-1, reserves finish rolling steel stretching notch 5-2 when pier shaft binds.In addition, pre-buried upper connecting reinforcement unit 8 and lower connecting reinforcement unit 9, upper connecting reinforcement unit 8 and lower connecting reinforcement unit 9 are all transversely arranged, and are fixedly connected with finish rolling steel 3.
Second step: installation bracket 4 after pier construction, this bracket 4 is fixed on inside pier shaft by upper connecting reinforcement unit reinforcing bar 8 and lower connecting reinforcement unit 9.Above bracket 4, set up bowl button support 6, lay template 7, colligation end bay Cast-in-Situ Segment reinforcing bar.
3rd step: adopt YCQ60Q200 type jack and the pre-buried pier shaft essence of ZB type hydraulic oil pump stretch-draw to prick steel 3, control stress under anchor σ
con=620MPa
4th step: build end bay Cast-in-Situ Segment concrete.
5th step: end bay closure construction.
6th: the pre-buried essence of release pier shaft pricks steel prestressing force, makes finish rolling steel be in relaxed state, ensures that pier shaft does not change its stress performance when bridge completion state, meets designing requirement.
7th step: carry out Dispose by grouting to finish rolling steel duct, mud jacking should adopt High Rotation Speed mixer (1500r/min) to carry out operation.
8th step: sealing off and covering anchorage, sealing off and covering anchorage concrete adopts the concrete of label identical with pier shaft.
Above are only a specific embodiment of the present utility model, but design concept of the present utility model is not limited thereto, all changes utilizing this design the utility model to be carried out to unsubstantiality, all should belong to the behavior of invading the utility model protection domain.
Claims (6)
1. a cantilever casting beam abutment pier prestressed reinforcement device, is characterized in that, comprising:
Be embedded in the finish rolling steel in pier shaft, wherein, every root essence is pricked outside steel and is inserted in rubber bellows, and essence is pricked steel lower end and established mud jacking hole, and finish rolling steel stretching notch is established at pier shaft top;
Pre-buried upper connecting reinforcement unit and lower connecting reinforcement unit, upper connecting reinforcement unit and lower connecting reinforcement unit are all transversely arranged, and are fixedly connected with finish rolling steel;
The bracket of pier shaft side, this bracket is fixed by upper connecting reinforcement unit reinforcing bar and lower connecting reinforcement unit and pier shaft; With the bowl button support set up above bracket and laying template.
2. a kind of cantilever casting beam abutment pier prestressed reinforcement device as claimed in claim 1, is characterized in that: fining twisted steel diameter is 30-40mm.
3. a kind of cantilever casting beam abutment pier prestressed reinforcement device as claimed in claim 1, is characterized in that: finish rolling steel is arranged along pier shaft outside upright.
4. a kind of cantilever casting beam abutment pier prestressed reinforcement device as claimed in claim 1, is characterized in that: finish rolling steel is provided with a row 5 totally.
5. a kind of cantilever casting beam abutment pier prestressed reinforcement device as claimed in claim 1, is characterized in that: also comprise jack and the hydraulic oil pump of pricking steel for the pre-buried pier shaft essence of stretch-draw.
6. a kind of cantilever casting beam abutment pier prestressed reinforcement device as claimed in claim 5, is characterized in that: described jack and hydraulic oil pump are located at pier shaft top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520350571.8U CN204715196U (en) | 2015-05-27 | 2015-05-27 | A kind of cantilever casting beam abutment pier prestressed reinforcement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520350571.8U CN204715196U (en) | 2015-05-27 | 2015-05-27 | A kind of cantilever casting beam abutment pier prestressed reinforcement device |
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| Publication Number | Publication Date |
|---|---|
| CN204715196U true CN204715196U (en) | 2015-10-21 |
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ID=54314201
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520350571.8U Expired - Fee Related CN204715196U (en) | 2015-05-27 | 2015-05-27 | A kind of cantilever casting beam abutment pier prestressed reinforcement device |
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| CN (1) | CN204715196U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110685222A (en) * | 2019-09-04 | 2020-01-14 | 上海城建市政工程（集团）有限公司 | Balance construction method for prefabricated bent cap support-free pull rod |
| CN115491990A (en) * | 2022-09-26 | 2022-12-20 | 中国十九冶集团有限公司 | Construction method for side-span cast-in-place section concrete pouring of continuous rigid frame bridge |
-
2015
- 2015-05-27 CN CN201520350571.8U patent/CN204715196U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110685222A (en) * | 2019-09-04 | 2020-01-14 | 上海城建市政工程（集团）有限公司 | Balance construction method for prefabricated bent cap support-free pull rod |
| CN115491990A (en) * | 2022-09-26 | 2022-12-20 | 中国十九冶集团有限公司 | Construction method for side-span cast-in-place section concrete pouring of continuous rigid frame bridge |
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Legal Events
| Date | Code | Title | Description |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151021 |