CN205997154U - The stretching bed seat of the U-shaped beam of track traffic large-tonnage pretensioning prestressed concrete - Google Patents
The stretching bed seat of the U-shaped beam of track traffic large-tonnage pretensioning prestressed concrete Download PDFInfo
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- CN205997154U CN205997154U CN201620963932.0U CN201620963932U CN205997154U CN 205997154 U CN205997154 U CN 205997154U CN 201620963932 U CN201620963932 U CN 201620963932U CN 205997154 U CN205997154 U CN 205997154U
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- tonnage
- base plate
- bed seat
- track traffic
- prestressed concrete
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Abstract
This utility model provides a kind of stretching bed seat of the U-shaped beam of track traffic large-tonnage pretensioning prestressed concrete it is characterised in that including：Base plate, strip footing, it is arranged on described base plate, for the U-shaped beam of supporting track traffic large-tonnage pretensioning prestressed concrete；Transfer beam, is arranged on the both sides of described base plate；Movable end gooseneck, is arranged on one end of described transfer beam；Fixing end gooseneck, is arranged on the other end of described brief biography beam；Jack, is arranged between movable end gooseneck and transfer beam.Compared with traditional pile foundation brace type gravity type pedestal, this utility model stretching bed seat is primarily subjected to axial compression power, and the strength of materials can give full play to.Pedestal have structure simple structure, stress clearly, avoid piling thus speed of application is fast, the advantages of greatly save construction material.
Description
Technical field
This utility model is related to a kind of stretching bed seat, particularly to the stretching bed seat of the U-shaped beam of pretensioning prestressed concrete.
Background technology
U-shaped beam is a kind of bearing beam of base-supporting, compared with box beam, T-shaped beam, have good looking appearance, building height low,
The advantages of scetion utilization height, saving construction material.External the 1950's begins to use, and mainly applies to highway and railway
Engineering, is subsequently employed for underground railway track traffic engineering.And domestic with later, simply use on a small quantity last century 70, the eighties
In highway engineering, just start research experiment in underground railway track traffic engineering to the beginning of this century, 1999 early in
Guangzhou Underground has carried out the test of a piece of beam.In recent years, developing rapidly with urban rail transit in China, U-shaped beam is extensive
Using Successful utilization is in the city track traffic engineerings such as Shanghai, Guangzhou, Nanjing.
U-shaped beam be mainly characterized by that perforated wall is thin, anti-twisting property is poor.Construction difficulty is big, and built-in fitting is more, construction
Required precision is high, and tension tonnage is larger, and strain-pull controlling of prestress requires strict, it is necessary to assure prestress wire tension stress is equal
Even.Thus, it is desirable to designed stretching bed seat must be firm solid, economic and practical.At present, open for large-tonnages such as beam slabs
Draw pedestal, generally all adopt the pile foundation of routine to support gravity type stretching bed seat, the shortcoming of this pedestal is that working procedure is complicated, and
And have danger of toppling.And due to reasons such as prestressed tension force applying modes, ram the loose soil with a stone-roller after sowing greatly position the structure design of tension force pedestal and
Manufacture particularly difficult.
Utility model content
The purpose of this utility model is to provide a kind of opening of the U-shaped beam of track traffic large-tonnage pretensioning prestressed concrete
Draw pedestal, to solve the above problems.
This utility model employs following technical scheme：
This utility model provides a kind of stretching bed seat of the U-shaped beam of track traffic large-tonnage pretensioning prestressed concrete, its
It is characterised by, including：Base plate, strip footing, it is arranged on described base plate, in advance should for supporting track traffic large-tonnage pre-tensioning system
Power concrete U-type beam；Transfer beam, is arranged on the both sides of described base plate；Movable end gooseneck, is arranged on the one of described transfer beam
End；Fixing end gooseneck, is arranged on the other end of described brief biography beam；Jack, be arranged on movable end gooseneck and transfer beam it
Between.
Further, stretching bed seat of the present utility model, can also have the feature that：Wherein, inside described transfer beam
There is the first tension cage bar and the second tension cage bar, described the one the first tension cage bars and the second tension cage bar are along the length of transfer beam
Direction of principal axis is arranged.
Further, stretching bed seat of the present utility model, can also have the feature that：Wherein, described transfer beam top
It is provided with compressive reinforcement, described compressive reinforcement is along the long axis direction setting of transfer beam.
Further, stretching bed seat of the present utility model, can also have the feature that：Wherein, in described strip footing
Portion has many strip footing stirrups being vertically arranged, and is arranged on many pile foundations top compressive reinforcement at top, basis top
Portion's compressive reinforcement is along the long axis direction setting of strip footing.
Further, stretching bed seat of the present utility model, can also have the feature that：Wherein, the inside of described base plate
There is a plurality of 3rd tension cage bar of the long axis direction setting along base plate.
Further, stretching bed seat of the present utility model, can also have the feature that：Wherein, the inside of described base plate
There are the many base plate stirrups being vertically arranged, mutually bind with the 3rd tension cage bar of relevant position.
The beneficial effect of utility model
Tension force pedestal of the present utility model, the power that tensioning steel twists is passed to by being arranged at the tensioning gooseneck at pedestal two ends
Both sides transfer beam, both sides transfer beam is undertaken in the form of axial compression power.So that the stretching dynamic balance of the steel strand wires to U-shaped beam, prevent U
Type beam concrete cracking.
The effect of base plate mainly adjusts uneven settlement of foundation, and end bottom plate also assume responsibility for the moment of flexure that eccentric force causes.
In addition, pedestal 1/2 depth is buried in the earth, by means of soil, sidewise restraint is formed to it, to improve the stability in the large of pedestal.With biography
The pile foundation brace type gravity type pedestal of system is compared, and this utility model stretching bed seat is primarily subjected to axial compression power, and the strength of materials can be fully
Play.Pedestal have structure simple structure, stress clearly, avoid piling thus speed of application is fast, greatly save construction material etc.
Advantage.
Brief description
Fig. 1 is the structural representation that the U-shaped beam of track traffic large-tonnage pretensioning prestressed concrete is located on its stretching bed seat
Figure.
Fig. 2 is the partial enlarged drawing in Fig. 1 lower right corner.
Fig. 3 is the elevation of stretching bed seat.
Fig. 4 is the partial enlarged drawing of Fig. 3 left end.
Fig. 5 is the partial enlarged drawing of right-hand member in Fig. 3.
Fig. 6 is the plane graph of stretching bed seat.
Fig. 7 is the partial enlarged drawing of left end in Fig. 6.
Specific embodiment
Below in conjunction with accompanying drawing, specific embodiments of the present utility model to be described.
As shown in figure 1, the U-shaped beam of large-tonnage pre-tensioned prestressed concrete 1, including：Base plate 101 and web 102, web 102
It is arranged on the both sides of base plate.There are in base plate 101 many prestress wires 103.In the present embodiment, base plate 101 is wide
4528mm, thick 400mm, web 102 average thickness 280mm, deck-molding 2m.
The U-shaped beam of large-tonnage pre-tensioned prestressed concrete of present embodiment, span has two kinds, respectively 30m and 35m.
Wherein, U-shaped beam baseboard prestress steel strand wires 103 radical 106 of 30m, 17.19 tons of single tendon stretch power, total tensioning
Tonnage reaches more than 1800 tons；The U-shaped beam baseboard prestress steel strand wires radical 144 of 35m, 17.6 tons of single tendon stretch power, total tensioning ton
Position reaches more than 2500 tons, is that large-tonnage first opens open thin walled bar.Tension tonnage belongs to large-tonnage more than 1000 tons.
The stretching bed seat of the U-shaped beam of track traffic large-tonnage pre-tensioned prestressed concrete.This stretching bed seat belongs to grooved pedestal,
There is base plate 3, the transfer beam 2 on base plate 3 both sides, movable end gooseneck 11 and fixing end gooseneck 12.Movable end gooseneck 11
See Fig. 2 with fixing end gooseneck 12.
As shown in Fig. 3, Fig. 6 and Fig. 7, prestress wire one end is anchored in fixing end gooseneck 12, and the other end is anchored in
Movable end gooseneck 11, in the transfer beam 2 of both sides, straining beam 6 is arranged on stretching bed seat bottom surface, bar to fixing gooseneck 12 freely-supported
Shape basis 7 framves are on straining beam 6.Jack 13 pushing tow movable end gooseneck 11 is mobile, prestress wire is elongated, treats coagulation
Soil solidifies and intensity reaches and puts a condition, puts tension prestress steel strand wires, realizes setting up prestress system in beam.For making transfer beam
Keep axial compression, prefabricated U beam base plate to be tensioned sinks in stretching bed seat, is positioned in strip footing 7 as far as possible.
Stretching bed seat bottom surface beam overall 8.1m, wherein, each 1m of both sides power transmission beam width, base plate width 6.1m.Both sides transfer beam 2 is high
1.84m, the high 0.74m of base plate.It is placed on relatively hard soil supporting layer.
Stretching bed seat 3 is to be built by reinforced concrete structure to form, and concrete material adopts C55 high-strength concrete, such as schemes
2nd, shown in Fig. 4 and Fig. 5, the reinforcing bar being configured in stretching bed seat 3 is largely divided into transfer beam part and bottom parts.
The reinforcing bar being arranged in transfer beam part includes：The first tension cage bar 21 He be arrangeding in parallel in transfer beam 2 bottom
Second tension cage bar 22, the first tension cage bar 21 and the second tension cage bar 22 (are also transfer beam along the length direction of stretching bed seat
Length direction) setting, the paper direction shown in that is, perpendicular to Fig. 2.
The compressive reinforcement 23 at transfer beam 2 top, also along the length direction setting of stretching bed seat, direction is also perpendicular to paper
Direction.
Many transfer beam 2 outer layer stirrups 25 and Duo Gen transfer beam internal layer stirrup 26, the two arranges parallel to paper.
Many transfer beam waist muscle 27 are arranged on inside and outside transfer beam, and the long axis direction along transfer beam 2 is arranged, that is, vertically
In paper.
The a plurality of transfer beam lacing wire 28 of horizontally-parallel setting from top to bottom, the transfer beam with relevant position in transfer beam 2
Waist muscle 27 is mutually bound.
The reinforcing bar being arranged in bottom parts includes：
Along a plurality of 3rd tension cage bar 24 of the long axis direction setting of base plate, the paper setting under Fig. 2 state.
A plurality of base plate stirrup 29, it is vertically arranged in the soleplate, mutually bind with the 3rd tension cage bar 24 of relevant position.
Reinforcing bar in strip footing 7 is the many strip footing stirrups 210 being vertically arranged and a plurality of strip footing top
Compressive reinforcement 211.Fig. 1 is shown in by strip footing stirrup 210 and strip footing 7 top compressive reinforcement 211.Basic top compressive reinforcement edge
The long axis direction setting of strip footing.
Reinforcing bar rank for configuration in stretching bed seat：Tension cage bar is the HRB500 level reinforcing bar of diameter 28mm, Steel Compression
Muscle is the HRB400 level reinforcing bar of diameter 16～20mm, and the HRB400 level reinforcing bar of diameter 12～16mm selected by stirrup.
Build stretching bed seat of the present utility model and in advance should using this stretching bed seat manufacture track traffic large-tonnage pre-tensioning system
The method of power concrete U-type beam is as follows：
Excavation of foundation pit, depth is more than bottom plate heights, can imbed tensioning base 1/2 height as standard after to build up completely,
Hole bottom foundation soil is rolled, soil compaction is consolidated；
The thick sandy soil of one layer of 10cm of laying or gravelly soil, grinding compacting on foundation soil, then 20cm thickness C15 is poured above
Concrete cushion；
Framework of steel reinforcement in colligation stretching bed seat and strip footing, installation form fixing termination billet, pour C55 high
Strength concrete；
Under room temperature sprinkle water maintenance pedestal concrete, reach after 28 days comprcssive strength after concrete strength, install jack with
And movable gooseneck and fixing gooseneck.
Anchoring steel strand wires, above tensioning gooseneck, make jack pushing tow gooseneck, tension steel strand；
Pour U-shaped beam concrete；
Steam curing U-shaped beam concrete；
Put and open, cut steel strand wires；
Extract beam body with lifting beam machine to store up to beam strorage area.
The U-shaped beam of track traffic large-tonnage pretensioning prestressed concrete adopts " stretching mode of a string two ", two panels beam string
In conjunction with when produce.
Compared with ordinary pile foundation brace type gravity type pedestal, of the present utility model it is a technical advantage that：Stretching bed seat 3 structure
More stable, anti-overturning problem need not be considered, therefore, there is no need to configuration Reinforced Concrete base and come to anchorage
Square, and then avoid piling, save the time, save construction material, construction more rapid and convenient.
Claims (6)
1. a kind of stretching bed seat of the U-shaped beam of track traffic large-tonnage pretensioning prestressed concrete is it is characterised in that include：
Base plate,
Strip footing, is arranged on described base plate, for the U-shaped beam of supporting track traffic large-tonnage pretensioning prestressed concrete；
Transfer beam, is arranged on the both sides of described base plate；
Movable end gooseneck, is arranged on one end of described transfer beam；
Fixing end gooseneck, is arranged on the other end of described transfer beam；
Jack, is arranged between movable end gooseneck and transfer beam.
2. the stretching bed seat of the U-shaped beam of track traffic large-tonnage pretensioning prestressed concrete as claimed in claim 1, its feature
It is：
Wherein, there is inside described transfer beam the first tension cage bar and the second tension cage bar, described first tension cage bar and second
Tension cage bar is along the long axis direction setting of transfer beam.
3. the stretching bed seat of the U-shaped beam of track traffic large-tonnage pretensioning prestressed concrete as claimed in claim 2, its feature
It is：
Wherein, described transfer beam top is provided with compressive reinforcement, and described compressive reinforcement is along the long axis direction setting of transfer beam.
4. the stretching bed seat of the U-shaped beam of track traffic large-tonnage pretensioning prestressed concrete as claimed in claim 3, its feature
It is：
Wherein, there are many strip footing stirrups being vertically arranged inside described strip footing, and be arranged on top many
Basic top compressive reinforcement, basic top compressive reinforcement is along the long axis direction setting of strip footing.
5. the stretching bed seat of the U-shaped beam of track traffic large-tonnage pretensioning prestressed concrete as claimed in claim 4, its feature
It is：
Wherein, the inside of described base plate has a plurality of 3rd tension cage bar of the long axis direction setting along base plate.
6. the stretching bed seat of the U-shaped beam of track traffic large-tonnage pretensioning prestressed concrete as claimed in claim 5, its feature
It is：
Wherein, the inside of described base plate has the many base plate stirrups being vertically arranged, the 3rd tension cage bar phase with relevant position
Mutually bind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620963932.0U CN205997154U (en) | 2016-08-26 | 2016-08-26 | The stretching bed seat of the U-shaped beam of track traffic large-tonnage pretensioning prestressed concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620963932.0U CN205997154U (en) | 2016-08-26 | 2016-08-26 | The stretching bed seat of the U-shaped beam of track traffic large-tonnage pretensioning prestressed concrete |
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| Publication Number | Publication Date |
|---|---|
| CN205997154U true CN205997154U (en) | 2017-03-08 |
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ID=58198481
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620963932.0U Active CN205997154U (en) | 2016-08-26 | 2016-08-26 | The stretching bed seat of the U-shaped beam of track traffic large-tonnage pretensioning prestressed concrete |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106426542A (en) * | 2016-08-26 | 2017-02-22 | 中铁二十三局集团轨道交通工程有限公司 | Rail transit large-tonnage pre-tensioning method prestressed concrete U type beam and tensioned bed thereof |
-
2016
- 2016-08-26 CN CN201620963932.0U patent/CN205997154U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106426542A (en) * | 2016-08-26 | 2017-02-22 | 中铁二十三局集团轨道交通工程有限公司 | Rail transit large-tonnage pre-tensioning method prestressed concrete U type beam and tensioned bed thereof |
| CN106426542B (en) * | 2016-08-26 | 2019-04-23 | 中铁二十三局集团轨道交通工程有限公司 | The U-shaped beam of rail traffic large-tonnage pretensioning prestressed concrete and its stretching bed seat |
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| GR01 | Patent grant |