CN104294754B - T-shaped section steel pipe regeneration concrete pier shaft - Google Patents
T-shaped section steel pipe regeneration concrete pier shaft Download PDFInfo
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- CN104294754B CN104294754B CN201410557529.3A CN201410557529A CN104294754B CN 104294754 B CN104294754 B CN 104294754B CN 201410557529 A CN201410557529 A CN 201410557529A CN 104294754 B CN104294754 B CN 104294754B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/262—Concrete reinforced with steel fibres
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/268—Composite concrete-metal
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of T-shaped section steel pipe regeneration concrete pier shaft, main steel pipe is located at the corner of T-shaped pier shaft, each secondary steel pipe using double steel plate and main steel-pipe welding as T-shaped pier shaft three limbs, secondary steel pipe is located at the end of each limb；Shear stud is welded with steel duct and its cell compartment surrounded with steel plate and pour steel fibre microdilatancy regeneration concrete, improve the stress performance of T-shaped pier shaft, improve its anti-torsion ability, and improve the bearing capacity and shock resistance of regeneration concrete by steel tube confinement, reduce suspection of the people to regeneration concrete poor performance, be conducive to popularization and application and construction refuse resource of the regeneration concrete in science of bridge building, realize turning waste into wealth.The present invention can be applicable in science of bridge building, especially ring road bridge, and the larger region of earthquake intensity and old bridge removal are rebuild or reconstructed, and expand the range of application of regeneration concrete.
Description
Technical field
The invention belongs to technical field of bridge engineering, more particularly to a kind of T-shaped section steel pipe regeneration concrete pier shaft.
Background technology
Regeneration concrete refers to by after broken, cleaning, classification, being compounded with level by a certain percentage by discarded concrete block
Close, partly or entirely replace the natural aggregates (mainly coarse aggregate) such as sandstone, add the new coagulation that cement, water etc. are formulated
Soil.Regeneration concrete can have following several situations by the combining form gathered materials：Gather materials all regenerated aggregates；Coarse aggregate is for again
Life is gathered materials, fine aggregate is natural sand；Coarse aggregate is natural rubble or cobble, fine aggregate are regenerated aggregate；Regenerated aggregate replacement portion
Divide coarse aggregate or fine aggregate.However, the influence due to adhering to old mortar in regeneration aggregate, compared with normal concrete, regeneration is mixed
Solidifying soil is more prone to micro-crack occur under uniaxial tension effect, and then causes the uniaxial compressive strength of regeneration concrete generally small
In normal concrete, its popularization and application is have impact on.
With the development of China's Development of China's Urbanization, building waste discharge capacity increases year by year, and renewable component ratio is also continuous
Improve.However, most of building waste is without any treatment, being transported to countryside or surrounding city carries out simply landfill or outdoor heap
Deposit, this not only wastes soil and resource, also pollutes environment；On the other hand, as population is growing, construction industry is to sandstone
The demand of aggregate is continuously increased.For a long time, it is cheap, it is considered to be to take it because sandstone aggregate wide material sources are easy to get
Not to the utmost, nexhaustible raw material and arbitrarily exploited, so as to cause resource exhaustion, landslide, riverbed to change its course, heavy damage
Natural environment.Production and using construction refuse regenerated aggregate for economizing on resources, environmental protection and realize holding for construction industry
Supervention exhibition is significant.
The popularization and application of regeneration concrete are conducive to construction refuse resource, meet environmental protection and sustainable development requirement.Can
The key character of sustainable development is environmental protection and the protection to natural resources.Regeneration concrete is made full use of, not only can be effective
The quantity of building waste is reduced, pollution of the building waste to natural environment is reduced, plays a part of environmental protection；And using again
The regenerated aggregate concrete of raw aggregate configuration can also reduce the exploitation in architectural engineering to natural aggregate, reach saving natural
The purpose of sandstone resource.Recycled concrete realizes the recycling to waste concrete, forms new building material product, has
Significant economic, society and environmental benefit.Therefore, from for the angle of environmental protection and utilization of resources, regeneration concrete
It is considered as ecological green concrete, its technical research of Efforts To Develop and application study are beneficial and necessary, meet building
The low-carbon economic policy requirement that the Mode of Circular of industry and country advocate, is also the weight of the great strategy of human kind sustainable development
Want one of measure.
The content of the invention
The technical problem to be solved in the present invention is to provide the T-shaped section steel pipe that a kind of bearing capacity is higher, anti-seismic performance is good
Regeneration concrete pier shaft, it is adaptable to curved slope, ring road to bridge pier in length and breadth and in torsional rigidity requirement bridge higher and antidetonation, city
City's landscape etc. has the bridge of particular/special requirement.
In order to solve the above technical problems, the present invention uses following technical scheme：T-shaped section steel pipe regeneration concrete pier shaft,
Including T-shaped pier shaft, T-shaped pier shaft is welded to form by four round steel pipes with six pieces of rectangular steel plates (batten plate), and round steel pipe is divided into master
Steel pipe and secondary steel pipe, main steel pipe are located at the corner of T-shaped pier shaft, and each secondary steel pipe uses double steel plate and main steel-pipe welding conduct
Three limbs of T-shaped pier shaft, secondary steel pipe is located at the end of each limb；Shearing resistance bolt is welded with steel duct and its cell compartment surrounded with steel plate
Follow closely and pour steel fibre microdilatancy regeneration concrete.
Double steel plate and the tangent welding of secondary steel pipe.
Shear stud arranges that shear stud arranges quantity per square meter 20~40 in plum blossom-shaped, shear stud length 80~
20mm, a diameter of 8~16mm of shear stud, the diameter of shear stud arrangement number and shear stud inversely, shear stud
Diameter it is proportional with length.
Main diameter of steel tube D and pair diameter of steel tube d or dd meet relational expression 0.33D<d<0.67D and arcsin (d/D)+
arcsin(dd/D)<85°。
Laterally two secondary steel pipe center of circle spacing L meet relational expression L to main diameter of steel tube D with T-shaped pier shaft<2.8D, and main steel pipe circle
The heart divides L equally.
The main steel pipe center of circle and T-shaped pier shaft longitudinal direction pair steel pipe center of circle spacing K and main diameter of steel tube D meet relational expression K<2.5D.
Steel fibre microdilatancy recycled concrete strength grade is C30~C40, and length of steel fiber is 40~50mm, draw ratio
It is 60~90, steel fibre parameter volume fraction is 0.9%~1.6%.
In steel fibre microdilatancy regeneration concrete, the volume of swelling agent is so that concrete produces 0.2~0.4MPa precompressions
It is advisable.
The steel ratio of T-shaped pier shaft is 7%~12%, and the wall thickness of round steel pipe is not preferably less than 5mm, and the thickness of steel plate is unsuitable small
In 3mm.
For the problem that regenerated aggregate concrete application is present, inventor devises a kind of T-shaped section steel pipe regeneration coagulation
Knoll body, main steel pipe is located at the corner of T-shaped pier shaft, and each secondary steel pipe is using double steel plate with main steel-pipe welding as T-shaped pier
Three limbs of body, secondary steel pipe is located at the end of each limb；Shear stud is welded with steel duct and its cell compartment surrounded with steel plate simultaneously
Steel fibre microdilatancy regeneration concrete is poured, the stress performance of T-shaped pier shaft is improved, its anti-torsion ability is improve, and improve
By the bearing capacity and shock resistance of the regeneration concrete of steel tube confinement, suspection of the people to regeneration concrete poor performance is reduced,
Be conducive to popularization and application and construction refuse resource of the regeneration concrete in science of bridge building, realize turning waste into wealth.T of the invention
Type section steel pipe regeneration concrete pier shaft can be applicable in science of bridge building, and especially ring road bridge, and earthquake intensity is larger
Region and old bridge removal are rebuild or are reconstructed, and expand the range of application of regeneration concrete.In the case where concrete amount is equal,
T-shaped section steel pipe regeneration concrete pier shaft of the invention is bigger by 1.8 than the direction across bridge bending rigidity of circular ordinary reinforced concrete bridge
More than times, bridge is indulged big by more than 1.5 to bending rigidity.Wherein, the bending rigidity of direction across bridge can be by adjusting secondary diameter of steel tube or master
Steel pipe and T-shaped pier shaft longitudinal direction pair steel pipe center of circle spacing K realize that it is firm to meet can also as needed to select the disposing way of pier shaft
The requirement of degree.Further, since encased steel plate and steel pipe can be used as template, therefore template is saved, accelerate construction speed
Degree, shortens construction period, and economic benefit is improve while bridge pier good appearance.
Brief description of the drawings
Fig. 1 is the structural representation of T-shaped section steel pipe regeneration concrete pier shaft of the invention.
Fig. 2 is the dimensional parameters schematic diagram of T-shaped section steel pipe regeneration concrete pier shaft of the invention.
In figure：1 main steel pipe, 2/3 secondary steel pipe, 4 steel plates, 5 shear studs, 6 steel fibre microdilatancy regeneration concretes.
Specific embodiment
As shown in figure 1, T-shaped section steel pipe regeneration concrete pier shaft of the invention, including T-shaped pier shaft, T-shaped pier shaft is by four
Round steel pipe is welded to form with six pieces of rectangular steel plates (batten plate), and round steel pipe is divided into main steel pipe 1 and secondary steel pipe 2/3, main steel pipe 1
In the corner of T-shaped pier shaft, each secondary steel pipe is welded as three limbs and double steel of T-shaped pier shaft using double steel plate 4 and main steel pipe 1
Plate 4 is located at the end of each limb with the tangent welding of secondary steel pipe, secondary steel pipe；It is welded with steel duct and its cell compartment surrounded with steel plate
Shear stud 5 simultaneously pours steel fibre microdilatancy regeneration concrete 6.
Manufacturing process
The wall thickness of round steel pipe is selected not to be preferably less than 5mm, the thickness of steel plate is not preferably less than 3mm.Cut first, make processing
Steel plate and major-minor steel pipe, by some shear studs (shear stud arrangement quantity per square meter 20~40, shear stud length 80~
20mm, a diameter of 8~16mm of shear stud) connector is welded on steel plate and major-minor steel pipe inner wall according to plum blossom-shaped, welds steel
Plate and major-minor steel pipe.Lifting install T-shaped section steel pipe pier shaft to cushion cap, adjustment make it vertical, and fix temporarily, in steel pipe
Steel fibre microdilatancy regeneration concrete is poured in portion and its cell compartment surrounded with steel plate.Steel fibre microdilatancy recycled concrete strength
Grade be C30~C40, T-shaped section steel pipe regeneration concrete pier shaft, its steel ratio should be 7%~12%.
Design principle
T-shaped section steel pipe regeneration concrete pier shaft of the invention can both meet requirement for bearing capacity, can improve by about again
The intensity and shock resistance of beam regeneration concrete.Mixed by setting major-minor steel pipe and irrigating micro expansion steel fiber regeneration in T-shaped pier shaft
Solidifying soil, improves the Torsion bearing capacity of T-shaped section pier shaft；Because steel duct pours regenerated aggregate concrete, in pressured state
Under, the intensity of regeneration concrete is improve by the constraint of steel pipe, and then the bearing capacity of regeneration concrete is improved, specifically：When
When axial force increases, because concrete has certain Poisson's ratio, it may occur that transversely deforming, when transversely deforming suffers restraints situation
Under, the development of concrete microcrack can be restricted, and deformation performance can also strengthen, so as to improve bearing capacity；Because core is mixed
Solidifying soil suffers restraints, and in geological process, the micro-crack of inside concrete is also not easy extension, so as to improve shock resistance.
Encased steel plate is closely connected with natural aggregate concrete by shear stud, is conducive to concrete and steel plate to cooperate.
As shown in Fig. 2 in the case where concrete and rolled steel dosage are certain, can be by having the main diameter of steel tube D of optimization, pair
Laterally two secondary steel pipe center of circle spacing L, the main steel pipe center of circle and T-shaped pier shaft longitudinal direction are secondary with T-shaped pier shaft for diameter of steel tube d, main diameter of steel tube D
The parameters such as steel pipe center of circle spacing K, send out the bending rigidity and torsional rigidity of T-shaped section steel pipe regeneration concrete pier shaft both direction
Wave optimal.With reference in science of bridge building to the rigidity and the custom requirements of torsional rigidity of bridge pier both direction, it is basic using mechanics
Knowledge, carries out cross section property calculating, draws：When main diameter of steel tube D and pair diameter of steel tube d or dd meet relational expression 0.33D<d<
0.67D and arcsin (d/D)+arcsin (dd/D)<85°；The diameter D of main steel pipe 1 and T-shaped pier shaft are laterally between the two secondary centers of circle of steel pipe 2
Meet relational expression L away from L<2.8D, and L is divided in the main steel pipe center of circle equally；The center of circle of main steel pipe 1 and the T-shaped pier shaft longitudinal direction pair center of circle spacing of steel pipe 3
K meets relational expression K with main diameter of steel tube D<It is scheme most economical, that stress is optimal during 2.5D.
To make regeneration concrete have certain initial compression after solidifying, the confined effect of steel pipe is given full play to, improved again
Growing concrete bearing capacity；On the other hand, regeneration concrete can shrink in hardening process, cause regeneration concrete and steel pipe or
Steel plate is de- glutinous, and regeneration concrete can also creep and cause regeneration concrete de- with steel pipe or steel plate during long-term operation
It is glutinous, to make regeneration concrete have certain compression and glutinous appearance of anti-anti-avulsion, according to calculating analysis and surveying, in regeneration concrete
In, the volume of swelling agent is so that concrete produces 0.2~0.4MPa precompressions to be advisable.Steel pipe and steel plate inside regeneration concrete exist
Moisture, and the maintenance that cannot sprinkle water are digested in hardening process, contraction fissure locally occurs, to increase the entirety of regeneration concrete
Property, prevents crack from occurring, and it is that 40~50mm, draw ratio are 60~90 that length can be added in regeneration concrete through statistical computation
Steel fibre, then parameter volume fraction is 0.9%~1.6%.
Claims (2)
1. a kind of T-shaped section steel pipe regeneration concrete pier shaft, including T-shaped pier shaft, it is characterised in that：The T-shaped pier shaft is by four
Round steel pipe is welded to form with six pieces of rectangular steel plates, and round steel pipe is divided into main steel pipe and secondary steel pipe, and main steel pipe is located at T-shaped pier shaft
Corner, each secondary steel pipe using double steel plate and main steel-pipe welding as T-shaped pier shaft three limbs, secondary steel pipe is located at the end of each limb
Portion；Shear stud is welded with the steel duct and its cell compartment surrounded with steel plate and pour steel fibre microdilatancy regeneration coagulation
Soil；The main diameter of steel tube D and pair diameter of steel tube d or dd meet relational expression 0.33D<d<0.67D and arcsin (d/D)+
arcsin(dd/D)<85°；Laterally two secondary steel pipe center of circle spacing L meet relational expression L to the main diameter of steel tube D with T-shaped pier shaft<
2.8D, and L is divided in the main steel pipe center of circle equally；The main steel pipe center of circle and T-shaped pier shaft longitudinal direction pair steel pipe center of circle spacing K and main diameter of steel tube
D meets relational expression K<2.5D；The steel fibre microdilatancy recycled concrete strength grade is C30~C40, and length of steel fiber is 40
~50mm, draw ratio are 60~90, and steel fibre parameter volume fraction is 0.9%~1.6%；The steel fibre microdilatancy regenerates coagulation
In soil, the volume of swelling agent makes concrete produce 0.2~0.4MPa precompressions；The double steel plate and the tangent welding of secondary steel pipe；Institute
State shear stud to be arranged in plum blossom-shaped, per square meter 20~40, shear stud 80~20mm of length resists shear stud arrangement quantity
Cut a diameter of 8~16mm of peg.
2. T-shaped section steel pipe regeneration concrete pier shaft according to claim 1, it is characterised in that：The T-shaped pier shaft contains
Steel rate is 7%~12%, and the wall thickness of round steel pipe is not less than 5mm, and the thickness of steel plate is not less than 3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410557529.3A CN104294754B (en) | 2014-10-20 | 2014-10-20 | T-shaped section steel pipe regeneration concrete pier shaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410557529.3A CN104294754B (en) | 2014-10-20 | 2014-10-20 | T-shaped section steel pipe regeneration concrete pier shaft |
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| CN104294754B true CN104294754B (en) | 2017-06-20 |
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| CN1009292B (en) * | 1988-09-02 | 1990-08-22 | 宋德印 | Special-shaped hollow column |
| JP2002115416A (en) * | 2000-10-11 | 2002-04-19 | Shimizu Corp | Multistory building |
| CN201011049Y (en) * | 2006-12-07 | 2008-01-23 | 沈阳建筑大学 | Special shaped steel pipe concrete core pole |
| CN101748859A (en) * | 2008-11-28 | 2010-06-23 | 沈阳建筑大学 | Steel-reinforced concrete core column and manufacturing method thereof |
| WO2011152741A1 (en) * | 2010-06-02 | 2011-12-08 | Pavlo Semenivskyi | Construction system for building industry, especially in the technology of fast assembling of skeleton type buildings |
| CN102587577A (en) * | 2012-03-15 | 2012-07-18 | 天津大学 | Steel tube-I beam combination steel tube concrete special-shaped columns and manufacture method thereof |
| CN103541504A (en) * | 2013-09-23 | 2014-01-29 | 沈阳建筑大学 | Special-shaped section steel tube recycled concrete core column |
| CN204139053U (en) * | 2014-10-20 | 2015-02-04 | 广西交通科学研究院 | T-shaped section steel pipe regeneration concrete pier shaft |
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