CN102635063A - Post-tensioned prestressing steel pipe high-strength concrete superposition bridge pier and construction method thereof - Google Patents
Post-tensioned prestressing steel pipe high-strength concrete superposition bridge pier and construction method thereof Download PDFInfo
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Abstract
The invention relates to a post-tensioned prestressing steel pipe high-strength concrete superposition bridge pier and a construction method of the bridge pier. The bridge pier comprises steel pipes, wherein the steel pipes are provided with multiple unbonded tendons, pipe-in concrete is poured among the inner walls of the steel pipes and the unbonded tendons, and the steel pipes, the unbonded tendons and the pipe-in concrete form a core column; pipe-outside concrete is poured at the exterior of the core column so as to form the superposition bridge pier, the conventional reinforced concrete bridge pier is internally provided with a plurality of high-strength preforming steel pipe concrete core columns with vertical prestressing tendons; and the interior prestressing steel pipe high-strength concrete core column are installed and constructed, then a reinforced concrete framework arranged outside the bridge pier is banded and the exterior concrete is poured, namely the vertical prestressing steel pipe high-strength concrete superposition bridge pier poured by interior and exterior concrete of the steel pipe in different stages is formed, wherein the interior prestressing core column is manufactured by adopting a post-tensioning method. According to the bridge pier and the construction method, effectively improve the aseismic safety and the validity of the conventional bridge pier structure, and the bridge pier has the characteristics of high carrying capacity, good seismic performance, convenience in construction and self reset.
Description
Technical field
The invention belongs to technical field of bridge engineering, relate to superimposed bridge pier of a kind of post-stressed high strength concrete filled steel tube 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 post-stressed high strength concrete filled steel tube 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 post-stressed high strength concrete filled steel tube; Comprise steel pipe 2; Be furnished with many unbonded prestressing tendons 3 in the steel pipe 2; Pouring has pipe inner concrete 1 between steel pipe 2 inwalls and the unbonded prestressing tendon 3, and steel pipe 2, unbonded prestressing tendon 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 superimposed bridge pier cross section is circular or square.
Said preparatory unbonded prestressing tendon 3 is with flexible pipe or parcel non-cohesive material.
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.
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 unbonded prestressing tendons 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; Promptly 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 pouring construction; Form the superimposed bridge pier of Pretensioned prestressing steel pipe high-strength concrete, carry out stretch-draw, the anchoring of unbonded prestressing tendon in the stem stem at last, form the superimposed bridge pier of post-stressed high strength concrete filled steel tube.
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 post-stressed high strength concrete filled steel tube comprises steel pipe 2, is furnished with the preparatory unbonded prestressing tendon 3 of the six roots of sensation in the steel pipe 2; Pouring has pipe inner concrete 1 between steel pipe 2 inwalls and the preparatory unbonded prestressing tendon 3; Steel pipe 2, preparatory unbonded prestressing tendon 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 a circle.
The construction sequence of this superimposed bridge pier is seen Fig. 3, as follows:
Step 6 is carried out stretch-draw, the anchoring of unbonded prestressing tendon 3 in the stem stem, forms the superimposed bridge pier of post-stressed high strength concrete filled steel tube.
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 unbonded prestressing tendon 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 post-stressed high strength concrete filled steel tube comprises steel pipe 2, is furnished with the preparatory unbonded prestressing tendon 3 of the six roots of sensation in the steel pipe 2; Pouring has pipe inner concrete 1 between steel pipe 2 inwalls and the preparatory unbonded prestressing tendon 3; Steel pipe 2, preparatory unbonded prestressing tendon 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 a circle.
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 unbonded prestressing tendon 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 gate spool inner concrete 4 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:
Step 6 is carried out stretch-draw, the anchoring of unbonded prestressing tendon 3 in the stem stem, forms the superimposed bridge pier of post-stressed high strength concrete filled steel tube.
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 unbonded prestressing tendon 3 among the embodiment can select the mode of socket flexible pipe to make it to isolate with surrounding concrete.
Claims (8)
1. superimposed bridge pier of post-stressed high strength concrete filled steel tube; Comprise steel pipe (2); It is characterized in that, be furnished with many unbonded prestressing tendons (3) in the steel pipe (2), pouring has pipe inner concrete (1) between steel pipe (2) inwall and the unbonded prestressing tendon (3); Steel pipe (2), unbonded prestressing tendon (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 post-stressed high strength concrete filled steel tube according to claim 1 is characterized in that, said unbonded prestressing tendon (3) is with flexible pipe or parcel non-cohesive material.
3. the superimposed bridge pier of post-stressed high strength concrete filled steel tube according to claim 1 is characterized in that, said superimposed bridge pier cross section is square, circle or rectangle.
4. the superimposed bridge pier of post-stressed high strength concrete filled steel tube 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 post-stressed high strength concrete filled steel tube 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; It is characterized in that, in steel pipe (2), arrange many unbonded prestressing tendons (3), then pouring pipe inner concrete (1) and closely knit vibrating in steel pipe (2) along its length direction; After inner concrete to be managed (1) reaches certain intensity; Promptly 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 plinth cast-in fixing bolt very, install and fix to the bridge pier precalculated position; Carry out outer reinforcing bar binding of stem stem and outside concrete pouring construction; Form the superimposed bridge pier of Pretensioned prestressing steel pipe high-strength concrete, carry out stretch-draw, the anchoring of unbonded prestressing tendon in the stem stem at last, form the superimposed bridge pier of post-stressed high strength concrete filled steel tube.
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 stem stem (5) has the outer concrete of equal gate spool between a plurality of, adjacent stem stem (5), forms the superimposed bridge pier of multicore post.
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 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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| CN201210128605XA CN102635063A (en) | 2012-04-28 | 2012-04-28 | Post-tensioned prestressing steel pipe high-strength concrete superposition bridge pier and construction method thereof |
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Cited By (6)
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| CN103741591A (en) * | 2013-12-30 | 2014-04-23 | 浙江工业大学 | Rubber concrete hollow pier with internal and external constraint |
| CN103758031A (en) * | 2014-01-26 | 2014-04-30 | 招商局重庆交通科研设计院有限公司 | Method for manufacturing assembled type bridge pier by utilizing steel fiber reinforced self-compacting concrete |
| CN104594186A (en) * | 2015-01-27 | 2015-05-06 | 清华大学 | Concrete structure reinforced by round FRP (fiber-reinforced plastic) confined concrete cores |
| CN106869121A (en) * | 2017-02-21 | 2017-06-20 | 南昌大学 | A kind of FRP pipes cast-in-place with half half prefabricated regeneration concrete prestressing force overlapping pile foundation and preparation method |
| 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 |
| CN114809295A (en) * | 2022-04-07 | 2022-07-29 | 中建三局集团有限公司 | Multi-inner-core pressure forming concrete-filled steel tube laminated member and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103741591A (en) * | 2013-12-30 | 2014-04-23 | 浙江工业大学 | Rubber concrete hollow pier with internal and external constraint |
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| CN103758031A (en) * | 2014-01-26 | 2014-04-30 | 招商局重庆交通科研设计院有限公司 | Method for manufacturing assembled type bridge pier by utilizing steel fiber reinforced self-compacting concrete |
| CN103758031B (en) * | 2014-01-26 | 2015-09-23 | 招商局重庆交通科研设计院有限公司 | A kind of method utilizing Steel Fiber Reinforced Self-compacting Concrete to prepare assembling bridge pier stud |
| CN104594186A (en) * | 2015-01-27 | 2015-05-06 | 清华大学 | Concrete structure reinforced by round FRP (fiber-reinforced plastic) confined concrete cores |
| CN106869121A (en) * | 2017-02-21 | 2017-06-20 | 南昌大学 | A kind of FRP pipes cast-in-place with half half prefabricated regeneration concrete prestressing force overlapping pile foundation and preparation method |
| 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 |
| CN114809295A (en) * | 2022-04-07 | 2022-07-29 | 中建三局集团有限公司 | Multi-inner-core pressure forming concrete-filled steel tube laminated member and manufacturing method thereof |
| WO2023193777A1 (en) * | 2022-04-07 | 2023-10-12 | 中建三局集团有限公司 | Multi-core pressure formed concrete-filled steel tube laminated component and manufacturing method therefor |
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Application publication date: 20120815 |