CN204139053U - 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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- CN204139053U CN204139053U CN201420606347.6U CN201420606347U CN204139053U CN 204139053 U CN204139053 U CN 204139053U CN 201420606347 U CN201420606347 U CN 201420606347U CN 204139053 U CN204139053 U CN 204139053U
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Abstract
The utility model discloses a kind of T-shaped section steel pipe regeneration concrete pier shaft, main steel pipe is positioned at the corner of T-shaped pier shaft, and each secondary steel pipe all adopts double steel plate and main steel-pipe welding as three limbs of T-shaped pier shaft, and secondary steel pipe is positioned at the end of each limb; Steel duct and be welded with shear stud with the lattice indoor that steel plate surrounds and build steel fibre microdilatancy regeneration concrete, improve the stress performance of T-shaped pier shaft, improve its anti-torsion ability, and the bearing capacity that improve by the regeneration concrete of steel tube confinement and shock resistance, decrease the suspection of people to regeneration concrete poor performance, be conducive to regeneration concrete applying and construction refuse resource in bridge engineering, realize turning waste into wealth.The utility model can be applicable in bridge engineering, and the region that especially ring road bridge, and earthquake intensity is larger and old bridge removal are rebuild or reconstruction, expand the range of application of regeneration concrete.
Description
Technical field
The utility model belongs to technical field of bridge engineering, particularly relates to a kind of T-shaped section steel pipe regeneration concrete pier shaft.
Background technology
Regeneration concrete refers to discarded concrete block after broken, cleaning, classification, mix with grating by a certain percentage, the natural aggregates (mainly coarse aggregate) such as part or all of replacement sandstone, then add the formulated as placed concrete such as cement, water.Regeneration concrete can have following several situation by the combining form of gathering materials: gathering materials is all regenerated aggregate; Coarse aggregate is regenerated aggregate, fine aggregate is natural sand; Coarse aggregate is natural rubble or cobble, fine aggregate is regenerated aggregate; Regenerated aggregate Substitute For Partial coarse aggregate or fine aggregate.But, owing to adhering to the impact of old mortar in regeneration aggregate, compared with ordinary concrete, regeneration concrete is more prone to occur micro-crack under uniaxial tension effect, and then cause the uniaxial compressive strength of regeneration concrete to be generally less than ordinary concrete, have impact on it and apply.
Along with the development of China's Development of China's Urbanization, building waste discharge value increases year by year, and renewable component ratio also improves constantly.But most of building waste is without any process, and be transported to countryside or surrounding city and carry out simple landfill or outdoorly to store up, this not only wastes soil and resource, also pollutes environment; On the other hand, along with population is growing, the demand of builing industry to sandstone aggregate constantly increases.For a long time, because sandstone aggregate wide material sources are easy to get, cheap, be considered to inexhaustible, nexhaustible raw material and arbitrarily exploited, thus causing resource exhaustion, landslide, riverbed to change its course, heavy damage natural environment.Produce and utilize construction refuse regenerated aggregate for economizing on resources, protection of the environment and to realize the sustainable development of builing industry significant.
Applying of regeneration concrete is conducive to construction refuse resource, meets environmental protection and sustainable development requirement.The key character of sustainable development is environmental protection and the protection to natural resource.Make full use of regeneration concrete, not only effectively can reduce the quantity of building waste, reduce building waste to the pollution of natural environment, play the effect of protection of the environment; And the regenerated aggregate concrete utilizing regeneration aggregate to configure can also reduce the exploitation to natural aggregate in construction work, reach the object of saving natural sandstone resource.Recycled concrete achieves the recycling to waste concrete, forms new building material product, has significant economy, society and environmental benefit.Therefore; from the angle of environmental protection and utilization of resources; regeneration concrete is considered to ecological ideas concrete; its technical research of Efforts To Develop and application study are useful and necessary; meeting the Mode of Circular of building trade and the low-carbon economic policy requirement of country's promotion, is also one of important measures of the great strategy of human kind sustainable development.
Utility model content
The technical problems to be solved in the utility model is to provide the T-shaped section steel pipe regeneration concrete pier shaft that a kind of bearing capacity is higher, anti-seismic performance is good, is applicable to curved slope, ring road to bridge pier in length and breadth and torsional rigidity requires in higher bridge and antidetonation, civic landscape etc. have the bridge of particular/special requirement.
For solving the problems of the technologies described above, the utility model is by the following technical solutions: T-shaped section steel pipe regeneration concrete pier shaft, comprise T-shaped pier shaft, T-shaped pier shaft is welded to form by four round steel pipes and six pieces of rectangular steel plates (batten plate), round steel pipe is divided into main steel pipe and secondary steel pipe, main steel pipe is positioned at the corner of T-shaped pier shaft, and each secondary steel pipe all adopts double steel plate and main steel-pipe welding as three limbs of T-shaped pier shaft, and secondary steel pipe is positioned at the end of each limb; Steel duct and be welded with shear stud with the lattice indoor that steel plate surrounds and build steel fibre microdilatancy regeneration concrete.
Double steel plate welds with secondary steel pipe is tangent.
Shear stud is that plum blossom-shaped is arranged, shear stud arranges the every square meter of quantity 20 ~ 40, shear stud length 80 ~ 20mm, and shear stud diameter is 8 ~ 16mm, shear stud arranges the diameter of number and shear stud inversely, and diameter and the length of shear stud are proportional.
Main diameter of steel tube D and secondary diameter of steel tube d or dd meets relational expression 0.33D<d<0.67D and arcsin (d/D)+arcsin (dd/D) <85 °.
Main diameter of steel tube D and T-shaped pier shaft laterally two secondary steel pipe center of circle spacing L meet relational expression L<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 longitudinally secondary 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 is 60 ~ 90, and steel fibre parameter volume fraction is 0.9% ~ 1.6%.
In steel fibre microdilatancy regeneration concrete, the volume of expansion agent is advisable to make concrete produce 0.2 ~ 0.4MPa precompression.
The steel ratio of T-shaped pier shaft is 7% ~ 12%, and the wall thickness of round steel pipe should not be less than 5mm, and the thickness of steel plate should not be less than 3mm.
For regenerated aggregate concrete application Problems existing, inventor has devised a kind of T-shaped section steel pipe regeneration concrete pier shaft, main steel pipe is positioned at the corner of T-shaped pier shaft, and each secondary steel pipe all adopts double steel plate and main steel-pipe welding as three limbs of T-shaped pier shaft, and secondary steel pipe is positioned at the end of each limb; Steel duct and be welded with shear stud with the lattice indoor that steel plate surrounds and build steel fibre microdilatancy regeneration concrete, improve the stress performance of T-shaped pier shaft, improve its anti-torsion ability, and the bearing capacity that improve by the regeneration concrete of steel tube confinement and shock resistance, decrease the suspection of people to regeneration concrete poor performance, be conducive to regeneration concrete applying and construction refuse resource in bridge engineering, realize turning waste into wealth.T-shaped section steel pipe regeneration concrete pier shaft of the present utility model can be applicable in bridge engineering, and the region that especially ring road bridge, and earthquake intensity is larger and old bridge removal are rebuild or reconstruction, expand the range of application of regeneration concrete.When concrete amount is equal, larger than the direction across bridge bending rigidity of circular ordinary reinforced concrete bridge more than 1.8 times of T-shaped section steel pipe regeneration concrete pier shaft of the present utility model, vertical bridge is to bending rigidity large more than 1.5.Wherein, the bending rigidity of direction across bridge realizes by adjusting the longitudinal secondary steel pipe center of circle spacing K of secondary diameter of steel tube or main steel pipe and T-shaped pier shaft, and the disposing way of pier shaft also can be selected as required to meet the requirement of rigidity.In addition, because encased steel plate and steel pipe can use as template, therefore save template, accelerate speed of application, shorten construction period, while bridge pier good looking appearance, improve economic benefit.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model T-shaped section steel pipe regeneration concrete pier shaft.
Fig. 2 is the dimensional parameters schematic diagram of the utility model T-shaped section steel pipe regeneration concrete pier shaft.
In figure: 1 main steel pipe, 2/3 secondary steel pipe, 4 steel plates, 5 shear stud, 6 steel fibre microdilatancy regeneration concretes.
Detailed description of the invention
As shown in Figure 1, T-shaped section steel pipe regeneration concrete pier shaft of the present utility model, comprise T-shaped pier shaft, T-shaped pier shaft is welded to form by four round steel pipes and six pieces of rectangular steel plates (batten plate), round steel pipe is divided into main steel pipe 1 and secondary steel pipe 2/3, main steel pipe 1 is positioned at the corner of T-shaped pier shaft, and each secondary steel pipe all adopts double steel plate 4 to weld three limbs as T-shaped pier shaft with main steel pipe 1 and double steel plate 4 welds with secondary steel pipe is tangent, and secondary steel pipe is positioned at the end of each limb; Steel duct and be welded with shear stud 5 with the lattice indoor that steel plate surrounds and build steel fibre microdilatancy regeneration concrete 6.
Manufacturing process
Select the wall thickness of round steel pipe to be less than 5mm, the thickness of steel plate should not be less than 3mm.First cut, make processing steel plate and major-minor steel pipe, by some shear stud, (shear stud arranges the every square meter of quantity 20 ~ 40, shear stud length 80 ~ 20mm, shear stud diameter is 8 ~ 16mm) connector is welded on steel plate and major-minor steel pipe inner wall according to plum blossom-shaped, welding steel and major-minor steel pipe.Lifting install T-shaped section steel pipe pier shaft on cushion cap, adjustment makes it vertical, and temporary fixed, builds steel fibre microdilatancy regeneration concrete in steel duct and with the lattice indoor that steel plate surrounds.Steel fibre microdilatancy recycled concrete strength grade is C30 ~ C40, and T-shaped section steel pipe regeneration concrete pier shaft, its steel ratio should 7% ~ 12%.
Design principle
T-shaped section steel pipe regeneration concrete pier shaft of the present utility model both can meet requirement for bearing capacity, can improve again intensity and the shock resistance of restrained regeneration concrete.By arranging major-minor steel pipe and perfusion micro expansion steel fiber regeneration concrete at T-shaped pier shaft, improve the Torsion bearing capacity of T-shaped cross section pier shaft; Because steel duct builds regenerated aggregate concrete, in a compressed state, improve the intensity of regeneration concrete by the constraint of steel pipe, and then improve the bearing capacity of regeneration concrete, specifically: when axial force increases time, because concrete has certain poisson's ratio, lateral deformation can occur, under lateral deformation suffers restraints situation, the development of concrete microcrack can be restricted, deformation performance also can strengthen, thus improves bearing capacity; Because core concrete suffers restraints, when geological process, the micro-crack of inside concrete is also not easy expansion, thus improves shock resistance.Encased steel plate and natural aggregate concrete, by shear stud compact siro spinning technology, are conducive to concrete and steel plate collaborative work.
As shown in Figure 2, when concrete and rolled steel dosage certain, by there being parameters such as optimizing the horizontal two secondary steel pipe center of circle spacing L of main diameter of steel tube D, secondary diameter of steel tube d, main diameter of steel tube D and T-shaped pier shaft, the main steel pipe center of circle and the longitudinal secondary steel pipe center of circle spacing K of T-shaped pier shaft, the bending rigidity of T-shaped section steel pipe regeneration concrete pier shaft both direction and torsional rigidity can be performed to optimum.In conjunction with in bridge engineering to the rigidity of bridge pier both direction and the custom requirements of torsional rigidity, adopt mechanics ABC, carry out cross section property calculating, draw: when main diameter of steel tube D and secondary diameter of steel tube d or dd meets relational expression 0.33D<d<0.67D and arcsin (d/D)+arcsin (dd/D) <85 °; Main steel pipe 1 diameter D and T-shaped pier shaft laterally two secondary steel pipe 2 center of circle spacing L meet relational expression L<2.8D, and L is divided in the main steel pipe center of circle equally; When main steel pipe 1 center of circle and longitudinal secondary steel pipe 3 center of circle spacing K and main diameter of steel tube D of T-shaped pier shaft meet relational expression K<2.5D, it is the scheme of most economical, stressed optimum.
There is certain initial compressive stress after solidifying for making regeneration concrete, giving full play to the confined effect of steel pipe, improve regeneration concrete supporting capacity; On the other hand, regeneration concrete can shrink in hardening process, cause regeneration concrete and steel pipe or steel plate de-glutinous, and regeneration concrete also can be crept and caused regeneration concrete and steel pipe or steel plate is de-sticks in the process of long-term operation, certain compressive stress and the glutinous appearance of anti-anti-avulsion is had for making regeneration concrete, according to computational analysis and actual measurement, in regeneration concrete, the volume of expansion agent is advisable to make concrete produce 0.2 ~ 0.4MPa precompression.Steel pipe and the inner regeneration concrete of steel plate digest moisture in hardening process, and maintenance of cannot sprinkling water, local there will be shrinkage crack, for increasing the globality of regeneration concrete, crackle preventing occurs, can add in regeneration concrete through statistical computation that length is 40 ~ 50mm, draw ratio is the steel fibre of 60 ~ 90, then parameter volume fraction is 0.9% ~ 1.6%.
Claims (9)
1. a T-shaped section steel pipe regeneration concrete pier shaft, comprise T-shaped pier shaft, it is characterized in that: described T-shaped pier shaft is welded to form by four round steel pipes and six pieces of rectangular steel plates, round steel pipe is divided into main steel pipe and secondary steel pipe, main steel pipe is positioned at the corner of T-shaped pier shaft, each secondary steel pipe all adopts double steel plate and main steel-pipe welding as three limbs of T-shaped pier shaft, and secondary steel pipe is positioned at the end of each limb; Described steel duct and be welded with shear stud with the lattice indoor that steel plate surrounds and build steel fibre microdilatancy regeneration concrete.
2. T-shaped section steel pipe regeneration concrete pier shaft according to claim 1, is characterized in that: described double steel plate welds with secondary steel pipe is tangent.
3. T-shaped section steel pipe regeneration concrete pier shaft according to claim 2, is characterized in that: described shear stud is that plum blossom-shaped is arranged, shear stud arranges the every square meter of quantity 20 ~ 40, and shear stud length 80 ~ 20mm, shear stud diameter is 8 ~ 16mm.
4. T-shaped section steel pipe regeneration concrete pier shaft according to claim 3, is characterized in that: described main diameter of steel tube D and secondary diameter of steel tube d or dd meets relational expression 0.33D<d<0.67D and arcsin (d/D)+arcsin (dd/D) <85 °.
5. T-shaped section steel pipe regeneration concrete pier shaft according to claim 4, is characterized in that: described main diameter of steel tube D and T-shaped pier shaft laterally two secondary steel pipe center of circle spacing L meet relational expression L<2.8D, and L is divided in the main steel pipe center of circle equally.
6. T-shaped section steel pipe regeneration concrete pier shaft according to claim 5, is characterized in that: the described main steel pipe center of circle and T-shaped pier shaft longitudinally secondary steel pipe center of circle spacing K and main diameter of steel tube D meet relational expression K<2.5D.
7. T-shaped section steel pipe regeneration concrete pier shaft according to claim 6, it is characterized in that: described steel fibre microdilatancy recycled concrete strength grade is C30 ~ C40, length of steel fiber is 40 ~ 50mm, draw ratio is 60 ~ 90, and steel fibre parameter volume fraction is 0.9% ~ 1.6%.
8. T-shaped section steel pipe regeneration concrete pier shaft according to claim 7, is characterized in that: in described steel fibre microdilatancy regeneration concrete, and the volume of expansion agent makes concrete produce 0.2 ~ 0.4MPa precompression.
9. T-shaped section steel pipe regeneration concrete pier shaft according to claim 8, is characterized in that: the steel ratio of described T-shaped pier shaft 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 |
|---|---|---|---|
| CN201420606347.6U CN204139053U (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 |
|---|---|---|---|
| CN201420606347.6U CN204139053U (en) | 2014-10-20 | 2014-10-20 | T-shaped section steel pipe regeneration concrete pier shaft |
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| Publication Number | Publication Date |
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| CN204139053U true CN204139053U (en) | 2015-02-04 |
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| CN201420606347.6U Withdrawn - After Issue CN204139053U (en) | 2014-10-20 | 2014-10-20 | T-shaped section steel pipe regeneration concrete pier shaft |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104294754A (en) * | 2014-10-20 | 2015-01-21 | 广西交通科学研究院 | T-sectional recycled concrete filled tubular pier |
-
2014
- 2014-10-20 CN CN201420606347.6U patent/CN204139053U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104294754A (en) * | 2014-10-20 | 2015-01-21 | 广西交通科学研究院 | T-sectional recycled concrete filled tubular pier |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150204 Effective date of abandoning: 20170620 |
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| AV01 | Patent right actively abandoned |