CN208717720U - A kind of bridge substructure using ultra-tough fiber concrete - Google Patents
A kind of bridge substructure using ultra-tough fiber concrete Download PDFInfo
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- CN208717720U CN208717720U CN201820695011.XU CN201820695011U CN208717720U CN 208717720 U CN208717720 U CN 208717720U CN 201820695011 U CN201820695011 U CN 201820695011U CN 208717720 U CN208717720 U CN 208717720U
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Abstract
The utility model relates to a kind of bridges to subtract vibration-isolating system, specifically disclose a kind of bridge substructure using ultra-tough fiber concrete, the base form of the bridge substructure is multi-column pier foundation, sandy gravel stratum is covered with above the clump of piles, cushion cap is placed above the sandy gravel stratum, precast assembly bridge pier is connected with above the cushion cap, the pier coping portion is equipped with bent cap, and the cushion cap and bridge pier are made of normal concrete and ultra-tough fiber concrete.The advantages that bridge substructure described in the utility model using ultra-tough fiber concrete has anti-seismic performance good, and endurance quality is superior, and prefabricated assembled speed of application is fast, small to surrounding environment influence, and element factory metaplasia produces, and quality is easily controllable.
Description
Technical field
The present invention relates to Bridge Seismic field, in particular to a kind of bridge lower junction using ultra-tough fiber concrete
Structure.
Background technique
Bridge is the key hinge in traffic engineering, is the important node for ensureing road traffic.Certainly due to science of bridge building
The design feature of body easily wrecks under the extreme conditions such as earthquake, in all previous violent earthquake both domestic and external in the latest 20 years
Bridge structure is destroyed seriously, and great economic loss is caused.Although wherein there is a large amount of bridge after undergoing geological process
Do not collapse, but due in bridge substructure the special and extent of the destruction of part component damage position it is serious, be difficult to after shake
To its reinforcement and repair, cause bed rearrangement bridge that can only push over reconstruction, causes huge waste of material and economic loss, also extreme influence
The recovery operation of road transport.It takes which kind of measure to improve anti-seismic performance of beam bridge, mitigates earthquake, especially effectively avoid bridge
The local damage of key position in substructure is a critical problem in current science of bridge building earthquake research.
For the high pier bridge of traditional pile foundation under severe earthquake action, biggish pier shaft quality causes the geological process of cushion cap bottom
Very big, bridge pier may will form more than two plastic hinge regions, while also will form plastic hinge region between cushion cap and pile foundation,
Cause Ductility Design relatively difficult.To solve the problem, foreign scholar proposed between a kind of consideration bridge pier and pile foundation, stake
Basis and Bridge Pier between separate design conception, and between pile foundation and Bridge Pier be laid with gravel layer formed sliding every
Layer is shaken, Relative sliding occurs using both cushion cap and gravel layer and reaches energy consumption and shock insulation, energy is reduced and is communicated up；The party simultaneously
Formula can extend the natural vibration period of bridge structure, the frequency domain of seismic energy concentration be avoided, so that earthquake response greatly reduces, most
Reach damping and isolation effect eventually.However above-mentioned separate type bridge foundation occurs to slide relatively in seismic loading lower cushion cap and sandy gravel stratum
It moves, cushion cap bottom will be made to generate biggish impact stress and stress raisers.The intensity and shock resistance of normal concrete
It is lower, it is difficult to resist above-mentioned complex stress, cushion cap threatens the safety of entire bridge structure it is easy to appear hitting to damage.Together
When, the simple concrete strength that improves will lead to the increase of cushion cap brittleness, also not can solve this problem.This is also separate type bridge foundation
System promotes the use the difficult point faced in Practical Project.
In recent years, Precast Concrete Segmental Bridges technology is short with its construction period, traffic impact amount is small, prefabricated components factory mass
The advantages that raw quality is easily controllable, durability is good is widely used in the beam section construction of science of bridge building.It will be pre-
For section assembling Technology application processed in Bridge Pier Construction, the Precast Concrete Segmental Bridges formula bridge pier that design is suitable for the technology becomes science of bridge building
One important directions of research.Research about Precast Concrete Segmental Bridges formula bridge pier at present, if being mostly vertically to be divided into bridge pier
Dry prefabricated subsection applies prestressing force by unbonded prestressing tendon and each bridge pier prefabricated subsection is vertically assemblied into bridge pier entirety, benefit
Improve the anti-seismic performance of bridge pier with the deformability that the opening of adjacent bridge pier prefabricated subsection seam is generated with closure.Such pier
Cylinder system has the advantages that Precast Concrete Segmental Bridges are constructed corresponding, and have the characteristics that self-resetting capability is strong.However above-mentioned segment
For precast splice type bridge pier under geological process, cushion cap can be due to opposite with bridge pier seam crossing and each prefabricated subsection seam crossing of bridge pier
It deforms and generates stress concentration phenomenon.And normal concrete is difficult to resist above-mentioned higher local stress, each prefabricated subsection component
It is likely to occur hitting damage, concrete scaling, pier stud surface concrete cracking, areas of plasticity hinge are difficult to repair after shaking etc. asks
Topic, the presence of exactly these problems cause above-mentioned each research achievement to be difficult to promote the use of in practical science of bridge building.
Summary of the invention
In order to overcome the deficiencies of the prior art, the present invention provides a kind of bridge lower junction using ultra-tough fiber concrete
Structure, by layer on its prefabricated subsection using ultra-tough fiber concrete reinforce, have self-resetting capability, subtract isolation property it is good,
It is able to bear that higher local stress and impact stress, cracking resistance are good, endurance quality is good, construction has realistic feasibility etc. excellent
Point.
To achieve the above object, the technical scheme is that including that the clump of piles of foundation soil is arranged in, on the clump of piles
Side is covered with sandy gravel stratum, and cushion cap is placed above the sandy gravel stratum, is connected with precast assembly bridge pier, the bridge pier above the cushion cap
Top is equipped with bent cap, and the cushion cap and bridge pier are made of normal concrete and ultra-tough fiber concrete.
It is provided with regular reinforcement, stirrup in the cushion cap, bent cap and bridge pier prefabricated subsection, and is provided with prestress hole
Road.
It is equipped with presstressed reinforcing steel at the top of the cushion cap bottom and bent cap and anchors reserved tunnel.
The splicing of the bridge pier prefabricated subsection and the connection of the bridge pier and cushion cap, bent cap are applied pre- by presstressed reinforcing steel
Stress is completed.
Since the present invention will subtract the thought of shock insulation while introduce bridge pier and basic part, pass through the earthquake isolation of multiple links
Improve bridge structure anti-seismic performance.By a clump of piles and cushion cap separate design, the phase in geological process lower cushion cap and gravel layer is utilized
Shock insulation energy consumption, reduction geological process, which are communicated up, while avoiding a clump of piles and cushion cap junction plasticity, to be achieved the purpose that sliding
The generation of hinge, protects multi-column pier foundation；Using Precast Concrete Segmental Bridges formula bridge pier, opening by each prefabricated subsection seam with close
The energy dissipation increased under geological process is closed, while structure reply displacement capabilities are strong, have very to the integrality of structure after shake
Good guarantee, and the structural system can effectively extend the natural vibration period of bridge structure, avoid the frequency domain model of seismic energy concentration
It encloses, further decreases geological process, also have that speed of application is fast, execution conditions requirement compared to current bridge pier cast-in-place construction
The advantages that low, small to surrounding environment influence；And due to the present invention using ultra-tough fiber concrete to each bridge pier prefabricated subsection and
Cushion cap carries out local strengthening, not only can guarantee the properties of component in normal operation, but also can bear to produce under geological process
Raw complex stress can effectively prevent each component to occur to hit the earthquakes such as crack and flake off of damage and concrete；Meanwhile
Local finite uses ultra-tough fiber concrete on the high side that project cost is made to have obtained good control, for the present invention
Practical application provide economic feasibility.
Detailed description of the invention
Fig. 1 is structure of the invention simplified schematic diagram.
Fig. 2 is 1 schematic detail view of the embodiment of the present invention.
Fig. 3 is the bridge pier prefabricated subsection component schematic diagram (cross-sectional view) of the embodiment of the present invention 1.
Fig. 4 is the bridge pier prefabricated subsection component schematic diagram (facade projection's figure) of the embodiment of the present invention 1.
Fig. 5 is the suspended deck structure schematic diagram (downward projection figure) of the embodiment of the present invention 1.
Fig. 6 is the suspended deck structure schematic diagram (facade projection's figure) of the embodiment of the present invention 1.
Fig. 7 is the suspended deck structure schematic diagram (3 dimensional drawing) of the embodiment of the present invention 1.
Fig. 8 is 2 schematic detail view of the embodiment of the present invention.
Fig. 9 is the bridge pier prefabricated subsection component schematic diagram (cross-sectional view) of Bridge 2 of embodiment of the present invention pier middle and upper part.
Figure 10 is the bridge pier prefabricated subsection component schematic diagram (facade projection's figure) of Bridge 2 of embodiment of the present invention pier middle and upper part.
Figure 11 is the bridge pier prefabricated subsection component schematic diagram (cross-sectional view) in Bridge 2 of embodiment of the present invention pier bottom portion.
Figure 12 is the bridge pier prefabricated subsection component schematic diagram (facade projection's figure) in Bridge 2 of embodiment of the present invention pier bottom portion.
Figure 13 is the suspended deck structure schematic diagram (downward projection figure) of the embodiment of the present invention 2.
Figure 14 is the suspended deck structure schematic diagram (facade projection's figure) of the embodiment of the present invention 2.
Figure 15 is the suspended deck structure schematic diagram (3 dimensional drawing) of the embodiment of the present invention 2.
Figure 16 is 1 structural system of the embodiment of the present invention in failure under earthquake action flowering structure displacement deformation figure.
Wherein: 1. clump of piles；2. sandy gravel stratum；3. backfill；4. cushion cap；5. bridge pier；6. bent cap；7. girder；8. presstressed reinforcing steel
Anchor reserved tunnel；9. bridge pier prefabricated subsection；10. normal concrete；11. presstressed reinforcing steel；12. bridge pier prefabricated subsection seam；
13. presstressed reinforcing steel anchored end；14. ultra-tough fiber concrete；15. prestressed pore passage；16. bridge pier prefabricated subsection main reinforcement；17. bridge
Pier prefabricated subsection stirrup；18. reinforcing bar duct of consuming energy；19. consume energy reinforcing bar；20. bridge pier prefabricated subsection hollow parts.
Specific embodiment
A kind of combined using ultra-tough fiber concrete bridge substructure proposed by the present invention can swing un-mixing bases
Plinth thought and precast segment assembly bridge pier thought and ultra-tough fiber concrete technology.Utilize the Relative sliding of cushion cap and a clump of piles
And the opening of each bridge pier prefabricated subsection seam and closure deformation energy consumption shock insulation, improve anti-seismic performance of beam bridge；Utilize ultra-tough
Fiber concrete carries out local strengthening to cushion cap, bridge pier prefabricated subsection component, and effectively component can not only be avoided because of geological process
Generated impact stress and stress are concentrated and are destroyed, and concrete scaling can be effectively improved, pier stud surface concrete is opened
It splits, be difficult to the problems such as repairing after areas of plasticity hinge shake.
In the above-mentioned bridge substructure using ultra-tough fiber concrete, the ultra-tough fiber concrete (UTFC)
It is a proprietary name in the art, generally refers to using millimeter grade particles (aggregate) and add the cement of steel fibre in the present invention
Base concrete is more excellent with respect to the another kind of mechanical property for normal concrete, high performance concrete mixes
Solidifying soil material, such as very-high performance fibre reinforced concrete, slip casting fiber concrete, Reactive Powder Concrete, closely knit arrangement of reinforcement are multiple
Condensation material etc., but preferably very-high performance steel fiber reinforced concrete.
In bridge substructure of the invention, each bridge pier prefabricated subsection specification is identical with size, by common coagulation
Soil and ultra-tough fiber concrete is prefabricated forms, the normal concrete is in the vertical middle part of the bridge pier prefabricated subsection, institute
It states ultra-tough fiber concrete and is in bridge pier prefabricated subsection bottom and top；The cushion cap is by normal concrete and ultra-tough
Fiber concrete pours, and the ultra-tough fiber concrete is poured in the cushion cap bottom and top and the bridge pier
Connecting part, the cushion cap rest part are poured by the normal concrete.
In above-mentioned bridge substructure, the multiple types such as rectangle, circle, dumb-bell shape are can be used in bridge pier prefabricated subsection section
Solid section or interior hollow cross-section form can be used in type, answers incorporation engineering is practical to determine its type.The present invention is respectively with rectangle
For pier hollow section and rectangle pier solid section.
In above structure system, the configuration of the regular reinforcement and the presstressed reinforcing steel should be calculated according to engineering practice
It determines.According to the design needs, steel strand wires, steel tendon or finish rolling prestressing force spiral can be used in the presstressed reinforcing steel, when described
When precast segment assembly bridge pier is higher, subsection tension is can be used in the presstressed reinforcing steel.In addition, can be in the precast segment assembly bridge
Pier pier bottom section setting energy consumption reinforcing bar.
Embodiment
As depicted in figs. 1 and 2, a kind of bridge substructure using ultra-tough fiber concrete, the bridge substructure
A clump of piles 1 including foundation soil is arranged in is covered with gravel layer 2 above a clump of piles 1, cushion cap 4, cushion cap 4 is placed with above gravel layer 2
Top and surrounding are covered with backfill 3, and 4 upper center region of cushion cap is connected with bridge pier 5, and bridge pier 5 is spelled by each bridge pier prefabricated subsection 9
It connects, 5 pier top of bridge pier is equipped with bent cap 6；
As shown in Figure 3, Figure 4, bridge pier prefabricated subsection 9 it is prefabricated by normal concrete 10 and ultra-tough fiber concrete 14 and
At middle part is bridge pier prefabricated subsection hollow parts 20, and it is pre- to be equipped with prestressed pore passage 15, bridge pier inside the bridge pier prefabricated subsection 9
Segment main reinforcement 16 processed and bridge pier prefabricated subsection stirrup 17；
As shown in Fig. 5, Fig. 6 and Fig. 7, cushion cap 4 is poured by normal concrete 10 and ultra-tough fiber concrete 14, is held
Prestressed pore passage 15 is preset in platform 4；
As shown in figure 16, under failure under earthquake action the structural system displacement deformation figure；The use of above-mentioned the present embodiment
The construction procedure of the bridge substructure of ultra-tough fiber concrete are as follows:
Embodiment 2
A kind of bridge substructure using ultra-tough fiber concrete as illustrated in figures 1 and 8.The bridge substructure
A clump of piles 1 including foundation soil is arranged in is covered with gravel layer 2 above a clump of piles 1, cushion cap 4, cushion cap 4 is placed with above gravel layer 2
Top and surrounding are covered with backfill 3, and 4 upper center region of cushion cap is connected with bridge pier 5, and bridge pier 5 is spelled by each bridge pier prefabricated subsection 9
It connects, 5 pier top of bridge pier is equipped with bent cap 6；
As shown in Fig. 9, Figure 10, Figure 11 and Figure 12, bridge pier prefabricated subsection 9 divides for bridge pier middle and upper part prefabricated subsection and bridge pier bottom
Two class of portion's prefabricated subsection, bridge pier prefabricated subsection 9 is by normal concrete 10 and ultra-tough fiber concrete 14 is prefabricated forms, the bridge
Prestressed pore passage 15, bridge pier prefabricated subsection main reinforcement 16 and bridge pier prefabricated subsection stirrup 17, the bridge are equipped with inside pier prefabricated subsection 9
Also there are the energy consumption reinforcing bar ducts 18 for energy consumption reinforcing bar 19 to be arranged for pier bottom portion prefabricated subsection；
As shown in Figure 13, Figure 14 and Figure 15, cushion cap 4 poured by normal concrete 10 and ultra-tough fiber concrete 14 and
At, prestressed pore passage 15 is preset in cushion cap 4, and be embedded with energy consumption reinforcing bar 19.
Claims (4)
1. a kind of bridge substructure using ultra-tough fiber concrete, it is characterised in that: including foundation soil is arranged in
A clump of piles (1), a clump of piles (1) top are covered with sandy gravel stratum (2), place cushion cap (4) above the sandy gravel stratum (2), the cushion cap
(4) top is connected with bridge pier (5), and the bridge pier (5) is spliced by each bridge pier prefabricated subsection (9), is set at the top of the bridge pier (5)
Have bent cap (6), the cushion cap (4) and bridge pier (5) are made of concrete (10) and ultra-tough fiber concrete (14)；Described is super
Toughness fiber concrete (14) is steel fiber reinforced concrete.
2. a kind of bridge substructure using ultra-tough fiber concrete according to claim 1, it is characterised in that: institute
It states in cushion cap (4), bent cap (6) and bridge pier prefabricated subsection (9) and is provided with reinforcing bar, stirrup, and be provided with prestressed pore passage
(15)。
3. a kind of bridge substructure using ultra-tough fiber concrete according to claim 1, it is characterised in that: institute
It states and anchors reserved tunnel (8) equipped with presstressed reinforcing steel at the top of cushion cap (4) bottom and bent cap (6).
4. a kind of bridge substructure using ultra-tough fiber concrete according to claim 1, it is characterised in that: institute
The connection of the splicing and the bridge pier (5) and cushion cap (4), bent cap (6) of stating bridge pier (5) prefabricated subsection passes through presstressed reinforcing steel (11)
Apply prestressing force to complete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820695011.XU CN208717720U (en) | 2018-05-10 | 2018-05-10 | A kind of bridge substructure using ultra-tough fiber concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820695011.XU CN208717720U (en) | 2018-05-10 | 2018-05-10 | A kind of bridge substructure using ultra-tough fiber concrete |
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| CN208717720U true CN208717720U (en) | 2019-04-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374332A (en) * | 2018-05-10 | 2018-08-07 | 长安大学 | A kind of bridge substructure and its construction method using ultra-tough fiber concrete |
| CN113356037A (en) * | 2021-05-31 | 2021-09-07 | 郑州大学 | Cast-in-place UHPC-NC combination formula antidetonation pier in outer assembly |
| CN114164749A (en) * | 2021-12-16 | 2022-03-11 | 武汉理工大学 | High-crack-resistance anti-corrosion pier structure and construction method thereof |
-
2018
- 2018-05-10 CN CN201820695011.XU patent/CN208717720U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374332A (en) * | 2018-05-10 | 2018-08-07 | 长安大学 | A kind of bridge substructure and its construction method using ultra-tough fiber concrete |
| CN113356037A (en) * | 2021-05-31 | 2021-09-07 | 郑州大学 | Cast-in-place UHPC-NC combination formula antidetonation pier in outer assembly |
| CN114164749A (en) * | 2021-12-16 | 2022-03-11 | 武汉理工大学 | High-crack-resistance anti-corrosion pier structure and construction method thereof |
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