CN102635064A - Pre-tensioned prestressing steel pipe high-strength concrete superposition bridge pier and construction method thereof - Google Patents
Pre-tensioned prestressing steel pipe high-strength concrete superposition bridge pier and construction method thereof Download PDFInfo
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- CN102635064A CN102635064A CN2012101286172A CN201210128617A CN102635064A CN 102635064 A CN102635064 A CN 102635064A CN 2012101286172 A CN2012101286172 A CN 2012101286172A CN 201210128617 A CN201210128617 A CN 201210128617A CN 102635064 A CN102635064 A CN 102635064A
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Abstract
The invention discloses a pre-tensioned prestressing steel pipe high-strength concrete superposition bridge pier and a construction method of the pre-tensioned prestressing steel pipe high-strength concrete superposition bridge pier. The bridge pier comprises steel pipes, wherein the steel pipes are provided with multiple prestressed tendons, high-strength concrete is poured among the inner walls of the steel pipes and the prestressed tendons, and the steel pipes, the prestressed tendons and the high-strength concrete form a core column; normal concrete is poured outside the core column to form the superposition bridge pier, and the interior of a traditional reinforced concrete bridge pier is provided with a plurality of prefabrication steel pipe high-strength concrete core columns with the vertical prestressing tendons; after the installation construction of the prestressing steel pipe high-strength concrete core columns is completed, a reinforced concrete skeleton frame of the bridge pier is bound and exterior concrete is poured, so that the vertically-prestressed steel pipe high-strength concrete superposed column pier with internal and external concrete of the steel pipe poured at different periods is formed, wherein the internal prestressed core column is fabricated by adopting a pre-tensioning way. With the adoption of the pre-tensioned prestressing steel pipe high-strength concrete superposition bridge pier and the construction method, the aseismic safety and effectivity of the existing bridge pier structure are effectively improved, and pre-tensioned prestressing steel pipe high-strength concrete superposition bridge pier has the advantages of high carrying capacity, good earthquake-resisting property, convenience in construction and self reset.
Description
Technical field
The invention belongs to technical field of bridge engineering, relate in particular to superimposed bridge pier of a kind of Pretensioned prestressing steel pipe high-strength concrete and job practices thereof.
Background technology
As the bridge construction key member, the bridge pier seismic design is bridge field important subject all the time.Present railroad bridge of China and highway bridge mainly adopt reinforced concrete bridge pier.Should be noted that; Reinforced concrete bridge pier have that the rigidity of structure is big, fatigue behaviour good, normability is good and feature performance benefit such as cost is reasonable in; Also the ubiquity stirrup restraint is weak, ductility is on the low side, shear strength is low and shortcoming such as poor seismic behavior; Shear failure takes place because of bridge pier shearing resistance, resistance to compression bearing capacity and deformability are on the low side easily, press the bending and twisting combined failure and topple to collapse etc. and destroy form; In recent years both at home and abroad repeatedly in the earthquake, all there is reinforced concrete bridge pier to destroy serious and is difficult to repair the earthquake phenomenon and take place, reconstruction work has caused very big difficulty after earthquake centre disaster relief and rescue and the calamity over the ground.Therefore; When make great efforts improving and improving traditional reinforced concrete bridge pier anti-seismic performance, the steel-concrete assembled pier form of innovative development new high-efficiency and the assembled pier Seismic Design Method that develops also day by day become current bridge engineering circle pay close attention to problem and research focus it.
In building construction under big quantity research of steel core concrete column and steel tube concrete superposed column and the application background, concrete pier of steel tube and steel tube concrete superposed column formula bridge pier (being called for short steel tube concrete superposed bridge pier) at home and abroad bridge engineering have also obtained some and have applied.Steel tube concrete superposed bridge pier in the steel tube confined concrete advantage, makes steel pipe corrosion-proof and pressurized cripling problem also obtain fine solution because steel pipe is built in reinforced concrete bridge pier inside in having concrete pier of steel tube.
Existing result of study shows, steel tube concrete superposed bridge pier (post) intensity is high, ductility is big and consume energy, and has the good resistance shock stability.For permanent set after effectively reducing the bridge construction earthquake is shaken the back repairing and reinforcement to make things convenient for bridge; Chinese scholars proposes " vertical prestressing bridge pier " (or from reset function) design reason recently; Promptly through at reinforced concrete bridge pier internal placement vertical prestressing bar, make bridge pier because vertical prestressing bar strains at the permanent set that acts on after the earthquake is effectively reduced.
Existing result of study shows, vertical prestressing not only can effectively reduce the bridge pier permanent set and be implemented in after the earthquake from reset function, and for improving bridge pier lateral deformation stiffness, shock resistance, overturning or slip resistance analysis and progressive collapse-resisting ability good contribution arranged all.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art; The object of the present invention is to provide superimposed bridge pier of a kind of Pretensioned prestressing steel pipe high-strength concrete and job practices thereof; Existing bridge pier structure quake-resistant safety property and validity have effectively been improved; Have that supporting capacity height, anti-seismic performance are good, easy construction and the characteristics that reset certainly, for bridge construction provides advanced technology.
In order to achieve the above object, the technical scheme of the present invention's employing is:
The superimposed bridge pier of a kind of Pretensioned prestressing steel pipe high-strength concrete; Comprise steel pipe 2; Be furnished with many presstressed reinforcing steels 3 in the steel pipe 2; Pouring has pipe inner concrete 1 between steel pipe 2 inwalls and the presstressed reinforcing steel 3, and steel pipe 2, presstressed reinforcing steel 3 and pipe inner concrete 1 form a stem stem 5, and concrete 4 forms superimposed bridge pier outside pipe has been built in stem stem 5 outsides.
Said presstressed reinforcing steel 3 can be indented bars, indented wire or steel strand.
Said superimposed bridge pier cross section is circular, square or square equal cross-section shape.
Said pipe inner concrete 1 is a high-strength concrete, and managing outer concrete 4 is ordinary concrete or high-strength concrete.
The present invention provides the job practices of the superimposed bridge pier of this pre-stressed steel pipe high-strength concrete simultaneously: in steel pipe 2, arrange many presstressed reinforcing steels 3 along its length direction; Inner concrete 1 and closely knit vibrating are managed in pouring in steel pipe 2 then; After waiting to manage inner concrete 1 and reaching certain intensity, cut off presstressed reinforcing steel 3 and put and open, form the stem stem 5 of pre-stressed steel pipe high-strength concrete; Stem stem 5 is connected with stem stem suspension column base plate through basic cast-in fixing bolt; Install and fix to the bridge pier precalculated position, carry out outer reinforcing bar binding of stem stem and outside concrete 4 pouring constructions again, promptly form the superimposed bridge pier of Pretensioned prestressing steel pipe high-strength concrete.
The present invention compared with prior art has the following advantages:
(1) supporting capacity is high: because superimposed bridge pier stem stem adopts high-strength concrete and is positioned at bridge pier inside; High-strength concrete receives steel pipe and the outer concrete constraint of stem stem in the stem stem; High-strength concrete intensity can be improved and give full play to; Correspondingly superimposed bridge pier cross section shear resistant capacity, vertical compression supporting capacity and pressure bending and twisting composite force supporting capacity all can be significantly improved, and effectively bend and cut the combined failure supporting capacity in the little bias voltage destruction of bridge pier, shear failure and end, under same design load; The bridge pier sectional dimension can be effectively reduced, and saves material, increases attractive in appearance and increases effects such as passing through the space under the bridge thereby can reach.
(2) anti-earthquake ductility is good: because high-strength concrete receives good constraint in the superimposed bridge pier stem stem; The high-strength concrete deformability is greatly improved; Simultaneously because the high strength concrete filled steel tube stem stem bears most axial compressions; Stem stem outer steel reinforced concrete partly bears axial compression less (be the outer steel reinforced concrete partly bears axial compression ratio less); Steel pipe receives the difficult secondary buckling unstable failure that takes place of inside and outside concrete constraint in addition, and therefore, superimposed bridge pier has good ductility and energy-dissipating property.Good ability of elastic-plastic deformation, ductile performance and the energy dissipation capacity of the superimposed bridge pier of pre-stressed steel pipe high-strength concrete; Can effectively prevent and avoid bridge pier heavy damage taking place and collapsing effective lifting concrete pier anti-seismic performance of ability and quake-resistant safety property under the shake greatly.
(3) elastic stiffness is big: the prestressing force stem stem is set in superimposed bridge pier can effectively increase bridge pier elasticity endurance and stiffness; Thereby effectively reduce bridge pier train, when heavy vehicle goes bridge vibration and under little shake elastic deformation, can improve vehicle safety and comfortableness.
(4) resetting property is good certainly: the prestressing force stem stem is set in superimposed bridge pier is equivalent to form the vertical prestressing bridge pier; Vertical prestressing bar can effectively reduce the permanent set of earthquake rear abutment; It is good in reset function (self-centering) that superimposed bridge pier is had after geological process; Make bridge pier after the small earthquakes effect, return to the bridge pier initial position basically, also can can't not repair even collapse under the shake doughtily because of big permanent set occurring.
(5) robustness is good: in recent years; Normal generation vehicle, ship collision bridge pier cause bridge pier generation heavy damage even the phenomenon of collapsing (Guangzhou Jiujiang Bridge); Inner pre-stressed steel pipe high-strength concrete stem stem and outer steel reinforced concrete double action at superimposed bridge pier pre-stressed steel pipe high-strength concrete stem stem be set, owing to can effectively improve the bridge pier robustness; Strengthen bridge pier antidetonation, anti-collision, shock resistance, overturning or slip resistance analysis and progressive collapse-resisting ability, improve the bridge pier security performance.
(6) good endurance: the conventional steel concrete pier that relative steel pipe exposes; Because steel pipe is positioned at the concrete pier center in the pre-stressed steel pipe high-strength concrete bridge pier; Need not consider the anticorrosion problem of steel pipe in the superposed column; The bridge pier endurance quality effectively improves, and more is applicable to the bridge pier structure that environment category is higher.
(7) pouring quality is good: because pre-stressed steel pipe high-strength concrete stem stem can prefabrication production; Therefore; The high-strength concrete pouring quality can obtain fine assurance in the high strength concrete filled steel tube stem stem, can avoid cast in situs to cause the interior high-strength concrete of stem stem to build problems such as being difficult for closely knit and on-the-spot maintenance difficulty.
(8) good economy performance: high-strength concrete receives steel pipe and outside concrete good constraint in the superimposed bridge pier; Can give full play to super high strength concrete performance advantage and a large amount of super high strength concrete that uses; Bridge pier sectional dimension and concrete amount can reduce greatly, have good economic benefit.Existing use experience shows, compares with ordinary reinforced concrete structure, and the common steel tube concrete structure cost cost of same performance is basic and reinforced concrete structure is fair.And the superimposed bridge pier of pre-stressed steel pipe high-strength concrete is owing to adopt thin-wall steel tube, and steel using amount is very little, can remove the steel pipe corrosion-proof maintenance cost from addition, compares with the conventional steel concrete pier, has more obvious economic advantages.
In general; The superimposed bridge pier of pre-stressed steel pipe high-strength concrete is a kind of have good stress performance, anti-seismic performance and endurance quality and easy construction, cost novel bridge pier form reasonable and easy to control the quality; Meet " firm, safe, durable " developing direction of the current civil engineering structure of China, have the applications well promotion prospect.
Description of drawings
Fig. 1 is the embodiment of the invention one structural representation.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is working procedure figure of the present invention.
Fig. 4 is the embodiment of the invention two structural representations.
Fig. 5 is the vertical view of Fig. 4.
Fig. 6 is the embodiment of the invention three structural representations.
Fig. 7 is the vertical view of Fig. 6.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is explained further details.
Embodiment one: the superimposed bridge pier of the single stem stem pre-stressed steel pipe high-strength concrete of circular cross-section
Referring to Fig. 1 and Fig. 2; The superimposed bridge pier of a kind of Pretensioned prestressing steel pipe high-strength concrete comprises steel pipe 2, is furnished with six roots of sensation presstressed reinforcing steel 3 in the steel pipe 2; Pouring has pipe inner concrete 1 between steel pipe 2 inwalls and the presstressed reinforcing steel 3; Steel pipe 2, presstressed reinforcing steel 3 and pipe inner concrete 1 form a stem stem 5, and concrete 4 forms superimposed bridge pier outside pipe has been built in stem stem 5 outsides, and superimposed bridge pier cross section is circular.
The construction sequence of this superimposed bridge pier is seen Fig. 3, as follows:
The superimposed bridge pier of the single stem stem pre-stressed steel pipe high-strength concrete of a kind of circular cross-section of preparation gained is as depicted in figs. 1 and 2, and the cross section of steel pipe 2 is circular, and the quantity of presstressed reinforcing steel 3 is the six roots of sensation.
Embodiment two: the superimposed bridge pier of the single stem stem pre-stressed steel pipe high-strength concrete in square-section
Referring to Fig. 4 and Fig. 5; The superimposed bridge pier of a kind of Pretensioned prestressing steel pipe high-strength concrete comprises steel pipe 2, is furnished with six roots of sensation presstressed reinforcing steel 3 in the steel pipe 2; Pouring has pipe inner concrete 1 between steel pipe 2 inwalls and the presstressed reinforcing steel 3; Steel pipe 2, presstressed reinforcing steel 3 and pipe inner concrete 1 form a stem stem 5, and concrete 4 forms superimposed bridge pier outside pipe has been built in stem stem 5 outsides, and superimposed bridge pier cross section is square.
The construction sequence of this superimposed bridge pier is seen Fig. 3, and is consistent with the method for embodiment one.
The single stem stem superimposed bridge pier of pre-stressed steel pipe high-strength concrete in a kind of square-section of preparation gained such as Fig. 4 and shown in Figure 5, the cross section of steel pipe 2 is a rectangle, the quantity of presstressed reinforcing steel 3 is the six roots of sensation.
Embodiment three: the superimposed bridge pier of oval cross section multicore post pre-stressed steel pipe high-strength concrete
Referring to Fig. 6 and Fig. 7, stem stem 5 has three, and equal outer concrete 4 of gate spool between the outer and adjacent stem stem 5 of stem stem 5 is formed the superimposed bridge pier of multicore post, and the cross section of superimposed bridge pier be an ellipse.
Construction sequence is following:
Preparation gained a kind of elliptic cross-section list stem stem superimposed bridge pier of pre-stressed steel pipe high-strength concrete such as Fig. 6 and shown in Figure 7, the cross section of steel pipe 2 is circular, and quantity is three, and the quantity of presstressed reinforcing steel 3 is the six roots of sensation.
The present invention can also comprise various embodiments such as twin-core post, three stem stems and the superimposed bridge pier of four-limbed pre-stressed steel pipe high-strength concrete.Among each embodiment, pipe inner concrete 1 all be a high-strength concrete, and manage outer concrete 4 usefulness ordinary concretes or high-strength concrete all can, the presstressed reinforcing steel 3 among the embodiment can be indented bars, indented wire or steel strand.
Claims (9)
1. superimposed bridge pier of Pretensioned prestressing steel pipe high-strength concrete; Comprise steel pipe (2); It is characterized in that, be furnished with many presstressed reinforcing steels (3) in the steel pipe (2), pouring has pipe inner concrete (1) between steel pipe (2) inwall and the presstressed reinforcing steel (3); Steel pipe (2), presstressed reinforcing steel (3) and pipe inner concrete (1) form a stem stem (5), and concrete (4) forms superimposed bridge pier outside pipe has been built in stem stem (5) outside.
2. the superimposed bridge pier of Pretensioned prestressing steel pipe high-strength concrete according to claim 1 is characterized in that said presstressed reinforcing steel (3) is indented bars, indented wire or steel strand.
3. the superimposed bridge pier of Pretensioned prestressing steel pipe high-strength concrete according to claim 1 is characterized in that, said superimposed bridge pier cross section is circular, square or rectangle.
4. the superimposed bridge pier of Pretensioned prestressing steel pipe high-strength concrete according to claim 1 is characterized in that, said stem stem (5) has the outer concrete (4) of equal gate spool between a plurality of, adjacent stem stem (5), forms the superimposed bridge pier of multicore post.
5. the superimposed bridge pier of Pretensioned prestressing steel pipe high-strength concrete according to claim 1 is characterized in that said pipe inner concrete (1) is a high-strength concrete, and managing outer concrete (4) is ordinary concrete or high-strength concrete.
6. the job practices of the superimposed bridge pier of the said pre-stressed steel pipe high-strength concrete of claim 1 is characterized in that, in steel pipe (2), arranges many presstressed reinforcing steels (3) along its length direction; Inner concrete (1) and closely knit vibrating are managed in pouring in steel pipe (2) then; After inner concrete to be managed (1) reached certain intensity, cut-out presstressed reinforcing steel (3) was put and is opened, and forms the stem stem (5) of pre-stressed steel pipe high-strength concrete; Stem stem (5) is connected with stem stem suspension column base plate through basic cast-in fixing bolt; Install and fix to the bridge pier precalculated position, carry out outer reinforcing bar binding of stem stem and outside concrete (4) pouring construction again, promptly form the superimposed bridge pier of Pretensioned prestressing steel pipe high-strength concrete.
7. the job practices of the superimposed bridge pier of pre-stressed steel pipe high-strength concrete according to claim 6 is characterized in that said presstressed reinforcing steel (3) is indented bars, indented wire or steel strand.
8. the job practices of the superimposed bridge pier of pre-stressed steel pipe high-strength concrete according to claim 6 is characterized in that, said stem stem (5) has the outer concrete (4) of equal gate spool between a plurality of, adjacent stem stem (5), forms the superimposed bridge pier of multicore post.
9. the job practices of the superimposed bridge pier of pre-stressed steel pipe high-strength concrete according to claim 6 is characterized in that said pipe inner concrete (1) is a high-strength concrete, and managing outer concrete (4) is ordinary concrete or high-strength concrete.
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| CN2012101286172A CN102635064A (en) | 2012-04-28 | 2012-04-28 | Pre-tensioned prestressing steel pipe high-strength concrete superposition bridge pier and construction method thereof |
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| CN2012101286172A CN102635064A (en) | 2012-04-28 | 2012-04-28 | Pre-tensioned prestressing steel pipe high-strength concrete superposition bridge pier and construction method thereof |
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| CN107675626A (en) * | 2017-09-05 | 2018-02-09 | 中交二航局第四工程有限公司 | Skin function concrete king-post and crossbeam synchronization pouring construction method |
| CN109870150A (en) * | 2019-03-19 | 2019-06-11 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of field surface observation pier structure |
| CN110409279A (en) * | 2019-07-03 | 2019-11-05 | 清华大学 | Strong bridge structure and construction method |
| CN112609565A (en) * | 2021-01-13 | 2021-04-06 | 安徽六安公路桥梁工程有限公司 | Steel pipe concrete prefabricated bridge pier |
| CN113494052A (en) * | 2021-07-06 | 2021-10-12 | 中铁二十局集团第六工程有限公司 | Construction method of solid pier column |
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| CN110409279A (en) * | 2019-07-03 | 2019-11-05 | 清华大学 | Strong bridge structure and construction method |
| CN112609565A (en) * | 2021-01-13 | 2021-04-06 | 安徽六安公路桥梁工程有限公司 | Steel pipe concrete prefabricated bridge pier |
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Application publication date: 20120815 |