CN105603968A - High-ductility prefabricated vibration-resistant concrete pile - Google Patents
High-ductility prefabricated vibration-resistant concrete pile Download PDFInfo
- Publication number
- CN105603968A CN105603968A CN201610015729.5A CN201610015729A CN105603968A CN 105603968 A CN105603968 A CN 105603968A CN 201610015729 A CN201610015729 A CN 201610015729A CN 105603968 A CN105603968 A CN 105603968A
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- ductility
- stirrup
- high ductility
- reinforcement cage
- concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/58—Prestressed concrete piles
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a high-ductility prefabricated vibration-resistant concrete pile. The concrete pile comprises concrete, a steel reinforcement cage, end plates and pile hoops, and the steel reinforcement cage is arranged inside the concrete; the end plates are arranged at the two ends of the steel reinforcement cage; each pile hoop is arranged outside the corresponding end plate; the steel reinforcement cage comprises prestressed steel reinforcements, a stirrup and high-ductility non-prestressed steel reinforcements, and the steel reinforcement cage is formed by roll-welding the prestressed steel reinforcements and the spiral stirrup; the high-ductility non-prestressed steel reinforcements are longitudinally fixed to the stirrup. By means of the high-ductility prefabricated vibration-resistant concrete pile, the defects that existing prefabricated concrete piles are poor in bending performance and ductility, the failure is brittle failure, ductility is poor, cracks appearing in the prefabricated concrete piles spread rapidly, steel reinforcements in a tensile area are yielded and tightened quickly till fracture, and the difference between ultimate bending moment and the cracking bending moment is not large are overcome, ductility of a tube pile is improved well, it is helpful to improve vibration resistance, maintenance cost can be lowered, the service life is prolonged, and the high-ductility prefabricated vibration-resistant concrete pile has the advantages of being simple in process, high in cost performance, wide in application scope and the like.
Description
Technical field
The present invention relates to the pile foundation material in underground foundation, relate in particular to the prefabricated anti-seismic concrete stake of a kind of high ductility.
Background technology
Abroad the anti-seismic performance of PHC pile tube is conducted in-depth research, and studied its many-sided corrective measure. Its corrective measure mainly comprises: pile tube is filled out core, stirrup and encrypted (stirrup ratio), high-strength stirrup, interpolation non-prestressing tendon, adopts the presstressed reinforcing steel of high elongation rate and at areas of plasticity hinge sticking glass fiber etc. The most study of wherein especially encrypting and add non-prestressing tendon with stirrup, its improvement effect is also the most obvious.
At present, domestic to the anti-seismic performance research of PHC pile tube almost in blank, the overwhelming majority researchs be all slow test or field trial. And the also state in more original backwardness of the pile tube production technology of domestic manufacturer, stirrup spacing, prestressed stretch-draws etc. all can not get good guarantee. From introducing PHC pile tube, just its anti-seismic performance is not carried out to systematic research, could not form the theoretical system of oneself. Domestic PHC pile tube is that production technology or research level all will be far below abroad. It is poor that the prefabricated concrete pipe pile that domestic prior art is produced exists anti-bending strength, destroy as brittle break, ductility is poor, and the rear rapid spread of cracking appears in precast concrete pile, tensile region reinforcing bar enters very soon surrender and tightens until fracture, ultimate bending moment and the cracking moment shortcoming such as be more or less the same.
Therefore, invent the prefabricated anti-seismic concrete stake of a kind of high ductility and seem very necessary.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides the prefabricated anti-seismic concrete stake of a kind of high ductility poor with the anti-bending strength that solves existing prefabricated concrete pipe pile and exist, to destroy as brittle break, ductility is poor, the problem that overall performance is poor. The prefabricated anti-seismic concrete stake of a kind of high ductility comprises concrete, steel reinforcement cage, and end plate and pile protection hoop, described steel reinforcement cage is arranged on concrete inside; The two ends of described steel reinforcement cage are provided with end plate; The outer setting of described end plate has pile protection hoop; Described steel reinforcement cage comprises deformed bar, stirrup and high ductility nonprestressed reinforcement, and described deformed bar becomes steel reinforcement cage with tie hoop roll welding; Described high ductility nonprestressed reinforcement is vertically fixed on stirrup.
Described deformed bar specifically prolongs stirrup girth and is evenly distributed, by with described high ductility nonprestressed reinforcement and concrete being equipped with, be conducive to improve anti-bending bearing capacity and the deformability of PHC pile tube.
It is that the roll welding of 4mm to 6mm reinforcing bar becomes tie hoop that described stirrup specifically adopts diameter, described adjacent stirrup spacing is 30mm to 80mm, by encrypting being equipped with of overstriking with described stirrup, be conducive to significantly improve cracking load and the ultimate load of PHC pile tube, and anti-bending bearing capacity and deformability, further improve overall shock resistance of the present invention.
Described high ductility nonprestressed reinforcement is specifically arranged in the middle of adjacent two deformed bars, distribute with deformed bar 1:1, by with being equipped with of described stirrup and presstressed reinforcing steel, be conducive to significantly improve cracking load and the ultimate load of PHC pile tube, further be conducive to improve anti-seismic performance, make to reduce maintenance cost, increase the service life.
It is the carbon steel structure steel of 20mm to 24mm that described end plate specifically adopts thickness, by with being equipped with of described steel reinforcement cage, be conducive to avoid pile crown cracking, improve the overall performance of pile tube, and have and have stronger penetration capacity.
The end of described high ductility nonprestressed reinforcement is specifically bent into " L " type and welds on end plate, is conducive to reinforce the anchoring effect of high ductility nonprestressed reinforcement.
Compared with prior art, the present invention has following beneficial effect: due to the pile foundation material in a kind of high ductility prefabricated anti-seismic concrete stake extensive use of the present invention and underground foundation. Meanwhile, beneficial effect of the present invention is:
1. concrete setting of the present invention, has the intensity of superelevation, is conducive to improve concrete strength of pile, and closely knit resistance to beating, has stronger penetration capacity, and the large geological conditions of supporting course fluctuations is had to stronger adaptability.
2. the setting of the high ductility nonprestressed reinforcement of steel reinforcement cage of the present invention, is conducive to significantly improve cracking load and ultimate load, and hysteresis loop is also fuller, is further conducive to improve anti-seismic performance, makes to reduce maintenance cost, increases the service life.
3. the stirrup of steel reinforcement cage of the present invention is encrypted the setting of overstriking, is conducive to improve anti-bending bearing capacity and the ductility of PHC pile tube, further improves overall shock resistance of the present invention.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of steel reinforcement cage of the present invention.
Fig. 3 is the cross-sectional view of steel reinforcement cage of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described further:
In figure:
1-concrete, 2-steel reinforcement cage, 21-deformed bar, 22-stirrup, the high ductility nonprestressed reinforcement of 23-, 3-end plate, 4-pile protection hoop.
Embodiment:
If accompanying drawing 1 is to as shown in accompanying drawing 3
The invention provides the prefabricated anti-seismic concrete stake of a kind of high ductility, comprise concrete 1, steel reinforcement cage 2, end plate 3 and pile protection hoop 4, described steel reinforcement cage 2 is arranged on the inside of concrete 1; The two ends of described steel reinforcement cage 2 are provided with end plate 3; The outer setting of described end plate 3 has pile protection hoop 4; Described steel reinforcement cage 2 comprises deformed bar 21, stirrup 22 and high ductility nonprestressed reinforcement 23, and described deformed bar 21 becomes steel reinforcement cage with tie hoop 22 roll weldings; Described high ductility nonprestressed reinforcement 23 is vertically fixed on stirrup 22.
Described deformed bar 21 specifically prolongs stirrup 22 girths and is evenly distributed, by with being equipped with of described high ductility nonprestressed reinforcement 23 and concrete 1, be conducive to improve anti-bending bearing capacity and the deformability of PHC pile tube.
The concrete employing diameter of described stirrup 22 is that the roll welding of 4mm to 6mm reinforcing bar becomes tie hoop, described adjacent stirrup 22 spacing are 30mm to 80mm, by encrypting being equipped with of overstriking with described stirrup 22, be conducive to significantly improve cracking load and the ultimate load of PHC pile tube, and anti-bending bearing capacity and deformability.
Described high ductility nonprestressed reinforcement 23 is specifically arranged in the middle of adjacent two deformed bars 21, distribute with deformed bar 211:1, by with being equipped with of described stirrup 22 and presstressed reinforcing steel 21, be conducive to significantly improve cracking load and the ultimate load of PHC pile tube.
Described end plate 3 is concrete adopts the carbon steel structure steel that thickness is 20mm to 24mm, by with being equipped with of described steel reinforcement cage 2, be conducive to avoid pile crown cracking, improve the overall performance of pile tube, and have and have stronger penetration capacity.
The end of described high ductility nonprestressed reinforcement 23 is specifically bent into " L " type and welds on end plate 3, is conducive to reinforce the anchoring effect of high ductility nonprestressed reinforcement.
Operation principle
The present invention is equipped with by deformed bar 21 and concrete 1, be conducive to improve PHC cracking of pipe pile load and ultimate load, the setting of high ductility nonprestressed reinforcement 22, be conducive to significantly improve anti-bending bearing capacity and the ductility of PHC pile tube, avoid the phenomenon of pile body cracking, improve the overall performance of pile tube more than 30%, after having configured high ductility nonprestressed reinforcement 22, simultaneously stressed with deformed bar 21, especially in the time bearing seismic loading, because high ductility nonprestressed reinforcement 22 has good plasticity, make the ductility of pile tube have good improvement, and technique is simple, cost is low, cost performance is high, be widely used in the foundation construction of various soil properties.
Utilize technical solutions according to the invention, or those skilled in the art being under the inspiration of technical solution of the present invention, designs similar technical scheme, and reaching above-mentioned technique effect, is all to fall into protection scope of the present invention.
Claims (6)
1. the prefabricated anti-seismic concrete stake of high ductility, is characterized in that, the prefabricated anti-seismic concrete of this high ductilityStake comprises concrete (1), steel reinforcement cage (2), end plate (3) and pile protection hoop (4), described reinforcing barCage (2) is arranged on the inside of concrete (1); The two ends of described steel reinforcement cage (2) are provided with end plate (3);The outer setting of described end plate (3) has pile protection hoop (4); Described steel reinforcement cage (2) comprises prestressing forceReinforcing bar (21), stirrup (22) and high ductility nonprestressed reinforcement (23), described deformed bar (21)Become steel reinforcement cage with tie hoop (22) roll welding; Described high ductility nonprestressed reinforcement (23) is longitudinally fixingOn stirrup (22).
2. the prefabricated anti-seismic concrete stake of high ductility as claimed in claim 1, is characterized in that, describedDeformed bar (21) specifically prolongs stirrup (22) girth and is evenly distributed.
3. the prefabricated anti-seismic concrete stake of high ductility as claimed in claim 1, is characterized in that, describedIt is that the roll welding of 4mm to 6mm reinforcing bar becomes tie hoop that stirrup (22) specifically adopts diameter, described adjacent stirrup(22) spacing is 30mm to 80mm.
4. the prefabricated anti-seismic concrete stake of high ductility as claimed in claim 1, is characterized in that, describedHigh ductility nonprestressed reinforcement (23) is specifically arranged in the middle of adjacent two deformed bars (21), and in advanceStress reinforcing bar (21) 1:1 distributes.
5. the prefabricated anti-seismic concrete stake of high ductility as claimed in claim 1, is characterized in that, describedIt is the carbon steel structure steel of 20mm to 24mm that end plate (3) specifically adopts thickness.
6. the prefabricated anti-seismic concrete stake of high ductility as claimed in claim 1, is characterized in that, describedThe end of high ductility nonprestressed reinforcement (23) is specifically bent into " L " type and welds on end plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610015729.5A CN105603968A (en) | 2016-01-11 | 2016-01-11 | High-ductility prefabricated vibration-resistant concrete pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610015729.5A CN105603968A (en) | 2016-01-11 | 2016-01-11 | High-ductility prefabricated vibration-resistant concrete pile |
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| CN105603968A true CN105603968A (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610015729.5A Pending CN105603968A (en) | 2016-01-11 | 2016-01-11 | High-ductility prefabricated vibration-resistant concrete pile |
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| CN (1) | CN105603968A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108396663A (en) * | 2018-04-11 | 2018-08-14 | 天津大学 | Bridge pier prosthetic device based on light-duty prestressing force stainless steel sheath and restorative procedure |
| CN111472352A (en) * | 2020-05-18 | 2020-07-31 | 天津大学建筑设计研究院 | Separated reinforcement pipe pile and reinforcement method and construction method thereof |
| CN113863295A (en) * | 2021-11-04 | 2021-12-31 | 江苏宏强新型建材有限公司 | Anti-seismic anti-cracking precast concrete pile and processing method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6043521A (en) * | 1983-08-22 | 1985-03-08 | Nippon Kokan Kk <Nkk> | Cast-in-place steel tubular concrete pile |
| CN201343726Y (en) * | 2009-06-04 | 2009-11-11 | 河南建华管桩有限公司 | Horizontal force bearing pile |
| CN202380461U (en) * | 2011-12-01 | 2012-08-15 | 安徽省交通规划设计研究院 | Anti-seismic prestressed high strength concrete (PHC) pipe pile |
| CN102747728A (en) * | 2012-07-30 | 2012-10-24 | 天津建城基业集团有限公司 | Prestressed centrifugal square pile |
| CN202644524U (en) * | 2012-04-20 | 2013-01-02 | 天津宝丰混凝土桩杆有限公司 | Tubular pile steel reinforcement cage mixed with non-prestressed reinforcing steel bar |
| CN202830923U (en) * | 2012-04-20 | 2013-03-27 | 天津宝丰混凝土桩杆有限公司 | Densified stirrup quake-proof tubular pile |
-
2016
- 2016-01-11 CN CN201610015729.5A patent/CN105603968A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6043521A (en) * | 1983-08-22 | 1985-03-08 | Nippon Kokan Kk <Nkk> | Cast-in-place steel tubular concrete pile |
| CN201343726Y (en) * | 2009-06-04 | 2009-11-11 | 河南建华管桩有限公司 | Horizontal force bearing pile |
| CN202380461U (en) * | 2011-12-01 | 2012-08-15 | 安徽省交通规划设计研究院 | Anti-seismic prestressed high strength concrete (PHC) pipe pile |
| CN202644524U (en) * | 2012-04-20 | 2013-01-02 | 天津宝丰混凝土桩杆有限公司 | Tubular pile steel reinforcement cage mixed with non-prestressed reinforcing steel bar |
| CN202830923U (en) * | 2012-04-20 | 2013-03-27 | 天津宝丰混凝土桩杆有限公司 | Densified stirrup quake-proof tubular pile |
| CN102747728A (en) * | 2012-07-30 | 2012-10-24 | 天津建城基业集团有限公司 | Prestressed centrifugal square pile |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108396663A (en) * | 2018-04-11 | 2018-08-14 | 天津大学 | Bridge pier prosthetic device based on light-duty prestressing force stainless steel sheath and restorative procedure |
| CN111472352A (en) * | 2020-05-18 | 2020-07-31 | 天津大学建筑设计研究院 | Separated reinforcement pipe pile and reinforcement method and construction method thereof |
| CN113863295A (en) * | 2021-11-04 | 2021-12-31 | 江苏宏强新型建材有限公司 | Anti-seismic anti-cracking precast concrete pile and processing method thereof |
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Application publication date: 20160525 |
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