CN205742156U - A kind of high ductility precast concrete pile - Google Patents
A kind of high ductility precast concrete pile Download PDFInfo
- Publication number
- CN205742156U CN205742156U CN201521071806.6U CN201521071806U CN205742156U CN 205742156 U CN205742156 U CN 205742156U CN 201521071806 U CN201521071806 U CN 201521071806U CN 205742156 U CN205742156 U CN 205742156U
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- CN
- China
- Prior art keywords
- high ductility
- precast concrete
- pile
- stirrup
- reinforcement cage
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Abstract
This utility model provides a kind of high ductility precast concrete pile, and including concrete, steel reinforcement cage, end plate and pile protection hoop, described steel reinforcement cage is arranged on the inside of concrete；The two ends of described steel reinforcement cage are provided with end plate；The outside of described end plate is provided with pile protection hoop；Described steel reinforcement cage includes 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.It is poor that this utility model changes existing precast concrete pile anti-bending strength, destroying is brittle break, and ductility is poor, spreads rapidly after precast concrete pile is cracking, tensile region reinforcing bar quickly enters surrender and tightens until rupturing, the shortcomings such as ultimate bending moment and cracking moment are more or less the same so that the ductility of pile tube has well improvement, improves the overall performance of precast concrete pile, and technique is simple, low cost, the advantages such as cost performance is high, applied range.
Description
Technical field
This utility model relates to the pile foundation material in underground foundation, particularly relates to a kind of high ductility precast concrete pile.
Background technology
Abroad the anti-seismic performance of PHC pile tube is conducted in-depth research, and have studied its many corrective measure.Its corrective measure specifically includes that pile tube is filled out core, stirrup encryption (stirrup ratio), high-strength stirrup, interpolation non-prestressing tendon, used the presstressed reinforcing steel of high elongation rate and at areas of plasticity hinge sticking glass fiber etc..The most especially encrypt and add the most study of non-prestressing tendon with stirrup, its improvement effect is the most obvious.
At present, the domestic anti-seismic performance research to PHC pile tube is nearly at blank, and the research of the overwhelming majority is all slow test or on-the-spot test.And the pile tube production technology of domestic manufacturer is also at the state of the original backwardness of comparison, stirrup spacing, prestressed stretch-draw etc. all can not get well ensureing.From introducing PHC pile tube, just its anti-seismic performance is not carried out systematic research, the theoretical system of oneself could not be formed.It may be said that domestic PHC pile tube either production technology or research level will be far below external.It is poor that the prefabricated concrete pipe pile that domestic prior art is produced also exists anti-bending strength, destroying is brittle break, and ductility is poor, spreads rapidly after precast concrete pile is cracking, tensile region reinforcing bar quickly enters surrender and tightens until fracture, and ultimate bending moment and cracking moment such as are more or less the same at the shortcoming.
Therefore, invent a kind of high ductility precast concrete pile and seem the most necessary.
Utility model content
In order to solve above-mentioned technical problem, this utility model provides a kind of high ductility precast concrete pile poor with the anti-bending strength solving existing prefabricated concrete pipe pile and existing, and destroys as brittle break, and ductility is poor, the problem that overall performance is poor.A kind of high ductility precast concrete pile includes that concrete, steel reinforcement cage, end plate and pile protection hoop, described steel reinforcement cage are arranged on the inside of concrete；The two ends of described steel reinforcement cage are provided with end plate；The outside of described end plate is provided with pile protection hoop；Described steel reinforcement cage includes deformed bar, stirrup and high ductility nonprestressed reinforcement, and described deformed bar becomes steel reinforcement cage with stirrup roll welding；Described high ductility nonprestressed reinforcement is vertically fixed on stirrup.
Described deformed bar is specifically evenly distributed along stirrup girth, by with being equipped with of described high ductility nonprestressed reinforcement and concrete, be conducive to improving anti-bending bearing capacity and the deformability of PHC pile tube.
Described stirrup specifically uses a diameter of 4mm to 6mm reinforcing bar roll welding to become stirrup, described adjacent stirrup spacing is 30mm to 80mm, by with being equipped with of described stirrup encryption overstriking, be conducive to significantly improving cracking load and the ultimate load of PHC pile tube, and anti-bending bearing capacity and deformability.
Described high ductility nonprestressed reinforcement is specifically located in the middle of adjacent two deformed bars, is distributed with deformed bar 1:1, by with being equipped with of described stirrup and presstressed reinforcing steel, be conducive to significantly improving cracking load and the ultimate load of PHC pile tube.
The carbon steel structure steel that described end plate specifically uses thickness to be 20mm to 24mm, by with being equipped with of described steel reinforcement cage, be conducive to avoiding pile crown to ftracture, 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 in " L " type welding ends head plate, is conducive to reinforcing the anchoring effect of high ductility nonprestressed reinforcement.
Compared with prior art, this utility model has the advantages that owing to a kind of high ductility precast concrete pile of the present utility model is extensively applied and the pile foundation material in underground foundation.Meanwhile, the beneficial effects of the utility model are:
The setting of concrete the most of the present utility model, has the intensity of superelevation, is conducive to improving concrete strength of pile, closely knit resistance to beats, and has stronger penetration capacity, the geological conditions that supporting course fluctuations is big is had stronger adaptability.
The setting of the high ductility nonprestressed reinforcement of steel reinforcement cage the most of the present utility model, is conducive to significantly improving cracking load and ultimate load, and hysteresis loop is the fullest, and component is ductile fracture feature.
The setting of the stirrup encryption overstriking of steel reinforcement cage the most of the present utility model, is conducive to improving anti-bending bearing capacity and the ductility of PHC pile tube.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of steel reinforcement cage of the present utility model.
Fig. 3 is the cross-sectional view of steel reinforcement cage of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described further:
In figure:
1-concrete, 2-steel reinforcement cage, 21-deformed bar, 22-stirrup, 23-high ductility nonprestressed reinforcement, 3-end plate, 4-pile protection hoop.
Embodiment:
As shown in accompanying drawing 1 to accompanying drawing 3
This utility model provides a kind of high ductility precast concrete pile, and including 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 outside of described end plate 3 is provided with pile protection hoop 4；Described steel reinforcement cage 2 includes 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 welding；Described high ductility nonprestressed reinforcement 23 is vertically fixed on stirrup 22.
Described deformed bar 21 is specifically evenly distributed along stirrup 22 girth, by with being equipped with of described high ductility nonprestressed reinforcement 23 and concrete 1, be conducive to improving anti-bending bearing capacity and the deformability of PHC pile tube.
Described stirrup 22 specifically uses a diameter of 4mm to 6mm reinforcing bar roll welding to become stirrup, described adjacent stirrup 22 spacing is 30mm to 80mm, by encrypting being equipped with of overstriking with described stirrup 22, be conducive to significantly improving 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 located in the middle of adjacent two deformed bars 21, it is distributed with deformed bar 211:1, by with being equipped with of described stirrup 22 and presstressed reinforcing steel 21, be conducive to significantly improving cracking load and the ultimate load of PHC pile tube.
The carbon steel structure steel that described end plate 3 specifically uses thickness to be 20mm to 24mm, by with being equipped with of described steel reinforcement cage 2, be conducive to avoiding pile crown to ftracture, 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 in " L " type welding ends head plate 3, is conducive to reinforcing the anchoring effect of high ductility nonprestressed reinforcement.
Operation principle
This utility model is equipped with by deformed bar 21 and concrete 1, be conducive to improving PHC cracking of pipe pile load and ultimate load, the setting of high ductility nonprestressed reinforcement 22, be conducive to significantly improving anti-bending bearing capacity and the ductility of PHC pile tube, avoid the phenomenon of pile body cracking, improve the overall performance more than 30% of pile tube, after being configured with high ductility nonprestressed reinforcement 22, with deformed bar 21 stress simultaneously, especially when bearing seismic loading, owing to high ductility nonprestressed reinforcement 22 has good plasticity, the ductility making pile tube has well improvement, and technique is simple, low cost, cost performance is high, it is widely used in the foundation construction of various soil property.
Utilize technical scheme described in the utility model, or those skilled in the art is under the inspiration of technical solutions of the utility model, design similar technical scheme, and reach above-mentioned technique effect, all fall into protection domain of the present utility model.
Claims (6)
1. one kind high ductility precast concrete pile, it is characterized in that, this high ductility precast concrete pile includes 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 outside of described end plate (3) is provided with pile protection hoop (4)；Described steel reinforcement cage (2) includes deformed bar (21), stirrup (22) and high ductility nonprestressed reinforcement (23), described deformed bar (21) becomes steel reinforcement cage with tie hoop (22) roll welding；Described high ductility nonprestressed reinforcement (23) is vertically fixed on stirrup (22).
High ductility precast concrete pile the most as claimed in claim 1, it is characterised in that described deformed bar (21) is specifically evenly distributed along stirrup (22) girth.
High ductility precast concrete pile the most as claimed in claim 1, it is characterised in that described stirrup (22) specifically uses a diameter of 4mm to 6mm reinforcing bar roll welding to become stirrup, and adjacent described stirrup (22) spacing is 30mm to 80mm.
High ductility precast concrete pile the most as claimed in claim 1, it is characterized in that, described high ductility nonprestressed reinforcement (23) is specifically located in the middle of adjacent two deformed bars (21), is distributed with deformed bar (21) 1:1.
High ductility precast concrete pile the most as claimed in claim 1, it is characterised in that the carbon steel structure steel that described end plate (3) specifically uses thickness to be 20mm to 24mm.
High ductility precast concrete pile the most as claimed in claim 1, it is characterised in that the end of described high ductility nonprestressed reinforcement (23) is specifically bent in " L " type welding ends head plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521071806.6U CN205742156U (en) | 2015-12-17 | 2015-12-17 | A kind of high ductility precast concrete pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521071806.6U CN205742156U (en) | 2015-12-17 | 2015-12-17 | A kind of high ductility precast concrete pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205742156U true CN205742156U (en) | 2016-11-30 |
Family
ID=57387768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521071806.6U Expired - Fee Related CN205742156U (en) | 2015-12-17 | 2015-12-17 | A kind of high ductility precast concrete pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205742156U (en) |
-
2015
- 2015-12-17 CN CN201521071806.6U patent/CN205742156U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20211217 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |