CN102071701A - Non-prestressed centrifugal concrete pile - Google Patents
Non-prestressed centrifugal concrete pile Download PDFInfo
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- CN102071701A CN102071701A CN 201110031335 CN201110031335A CN102071701A CN 102071701 A CN102071701 A CN 102071701A CN 201110031335 CN201110031335 CN 201110031335 CN 201110031335 A CN201110031335 A CN 201110031335A CN 102071701 A CN102071701 A CN 102071701A
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Abstract
The invention discloses a non-prestressed centrifugal concrete pile, which is characterized by comprising a centrifugal concrete pile body, a non-prestressed main bar, a spiral stirrup and two end plates, wherein the non-prestressed main bar is longitudinally distributed and is welded or bound on the spiral stirrup; and the two ends of the non-prestressed main bar are welded respectively or anchored on the two end plates through anchor holes. Based on the conventional non-prestressed centrifugal concrete pile, a prestressed main bar which is positioned on a reinforcement framework and can longitudinally pass through the entire framework is replaced by the non-prestressed main bar, a centrifugal molding process is used in a production process and a part of residual water is brought out centrifugally, so that concrete is more compact. The advantages of a centrifugal pile and a solid square pile are brought into full play, and the centrifugal concrete pile which has high vertical bearing capacity and high horizontal bearing capacity of a pile foundation and can meet a seismic resistance requirement is provided. Simultaneously, a prestress application process is eliminated, so that the non-prestressed centrifugal concrete pile is produced by a production method which is simpler than the conventional production method of a prestressed centrifugal concrete pile, and production efficiency is higher.
Description
Technical field
The present invention relates to a kind of centrifugal concrete pile, particularly a kind of non-prestressed centrifugal concrete pile that had not only had high vertical bearing capacity but also given the high horizontal bearing capacity of pile foundation belongs to building material field.
Background technology
Prestressed concrete pipe pile and side stake and prestressed high-strength concrete pile and side's stake because have the bearing capacity of single pile height, batch production is prefabricated, quality control is easy than site operation, site operation speed fast, the characteristics of reduction building foundation cost, replace the tube-sinking cast-in-situ pile that generally adopts in the construction work pile foundation, reinforced concrete prefabricated side stake, bored pile and steel pipe pile etc., obtain increasing engineering in China and use.Prestressed concrete pipe pile and side's stake make concrete more closely knit owing to adopted prestressing technique and centrifugation technique, and vertical bearing capacity improves greatly.But concrete is a typical brittleness material, the modulus of elasticity height, and its compressive strength and tensile strength do not have linear corresponding relation.Along with going deep into that prestressed concrete pipe pile and side's stake in recent years studied, to its horizontal bearing capacity, particularly the horizontal bearing capacity of pre-stressed concrete pipe pile foundation has different viewpoints, therefore, country and part province standard or atlas are made relevant regulations, the prestressed concrete pipe pile scope of application is that non-antidetonation district and seismic fortification intensity 6 are spent, the areas of 7 degree, if be used in the area of seismic fortification intensity 8 degree, then needs to check separately; Perhaps should not use in the area of seismic fortification intensity 8 degree.
In the area to having shockproof requirements or seismic fortification intensity 8 to spend, the selectable scope of pile foundation is narrower, mainly adopts horizontal bearing capacity not apply prestressed solid side's stake or in situ pile preferably.Although the preparation of present solid side stake can prefabrication, owing to from great, generally adopt natural curing technology, production efficiency is low; The problem that field fabrication brings makes difficult quality control and guarantees.
Summary of the invention
The objective of the invention is in order to solve the hypodynamic problem of above-mentioned pre existing prestressed concrete pile foundation horizontal bearing, overcome weak points such as prefabricated solid side's stake or in situ pile production efficiency are low, bring into play the advantage of centrifugal stake and solid side stake, on the basis of the design of reinforcement of pre existing stress centrifugal concrete pile and production process, it is all high to design a kind of vertical bearing capacity, horizontal bearing capacity and production efficiency, can satisfy the non-prestressed centrifugal concrete pile of shockproof requirements.
Non-prestressed centrifugal concrete pile of the present invention, its structure comprises centrifugal concrete pile body, non-prestressed main muscle, spiral stirrup, 2 end plates, on spiral stirrup, weld respectively or be anchored on 2 end plates through anchor hole by non-prestressed main muscle two ends to distribution and welding or colligation for described non-prestressed main flaccidity of tendon and muscle.
Sagging for preventing cage of reinforcement, can have additional erection hoop reinforcement, described erection hoop reinforcement is a steel hoop, spaced apart and welding or colligation are in the spiral stirrup and the non-prestressed main muscle outside with 1m ~ 2m.
When described non-prestressed centrifugal concrete pile was non-prestressed centrifugal concrete pipe pile, described spiral stirrup was the circle spiral stirrup, and erection hoop reinforcement is the annular reinforcing bar, and end plate is annular or circular steel plate.
When described non-prestressed centrifugal concrete pile was the stake of non-prestressed centrifugal concrete side, the described spiral stirrup side of being spiral stirrup, the erection hoop reinforcement side of being steel hoop, end plate were the outer square or square plate of interior circle.
Above-mentioned non-prestressed main muscle is selected hot rolling II, III grade reinforcing steel or cold-drawn low-carbon wire, heat tempering bar for prestressed concrete, compressor wire and the steel wire that eliminates stress for use.
Non-prestressed centrifugal concrete pile of the present invention, its production method lack with one prestressing force than the production method of pre existing stress centrifugal concrete pile and apply outside the technology, and other is basic identical, mainly comprises: raw material detect; Mold cleaning; Reinforcing cage is made; End plate is installed, welding of non-prestressed main muscle two ends or anchoring; Concrete stirs, cloth; Matched moulds; Thermal curing; The demoulding; Detect.
Non-prestressed centrifugal concrete pile of the present invention, mainly be on the basis of existing prestressed centrifugally concrete pile, change the prestressing force master muscle that can vertically run through whole skeleton on the cage of reinforcement into non-prestressed main muscle, and cancellation prestressing force applies technology, make the horizontal bearing capacity of centrifugal concrete pile identical with solid precast square pile, in production process, use centrifugal molding process, because of centrifugal pile tube or the side's stake endoporus of making becomes round, give circle or square-outside and round-inside shape in its cylindrical, the centrifugal in addition excessive moisture that can also extrude in the concrete, this part water is in order to allow concrete workability meet the demands and to add, the water/binder ratio of hydrated cementitious needs only is 0.234 in theory, and for satisfying construction requirement, even prestressed high-strength pile tube, its water/binder ratio often also reaches about 0.28, and by centrifugal, the part excessive moisture is taken out of; Under centrifugal action, concrete has individual compression process simultaneously, makes concrete fine and close more.Given full play to centrifugal stake and solid side's advantage, be a kind of vertical bearing capacity height, pile foundation level bearing capacity height, can satisfy the centrifugal concrete pile of shockproof requirements.Simultaneously, also apply technology owing to cancelled prestressing force, easier than the production method of existing production prestressed centrifugally concrete pile, production efficiency is higher, and can use in high seismic fortification intensity area, for concrete pile has increased new kind.
Description of drawings:
Fig. 1 is non-prestressed centrifugal concrete pile of the present invention a kind of structural representation of (comprising pile tube and side's stake).
Among the figure 1 is the centrifugal concrete pile body, the 2nd, and end plate, the 3rd, non-prestressed main muscle, the 4th, spiral stirrup, the 5th, main muscle anchor hole, the 6th, erection hoop reinforcement.
The specific embodiment
That the invention will be further described is as follows below in conjunction with accompanying drawing:
Non-prestressed centrifugal concrete pile of the present invention, its structure comprises centrifugal concrete pile body 1, non-prestressed main muscle 3,4,2 end plates 2 of spiral stirrup, described non-prestressed main muscle 3 vertical distributions and welding or colligation are on spiral stirrup 4, and non-prestressed main muscle 3 two ends are welded respectively or are anchored on 2 end plates 2 through anchor hole 5.
Sagging for preventing cage of reinforcement, can have additional erection hoop reinforcement 6, described erection hoop reinforcement is a steel hoop, spaced apart and welding or colligation are in the spiral stirrup 4 and non-prestressed main muscle 3 outsides with 1m ~ 2m.
When described non-prestressed centrifugal concrete pile was non-prestressed centrifugal concrete pipe pile, described spiral stirrup 4 was the circle spiral stirrup, and erection hoop reinforcement 6 is the annular reinforcing bar, and end plate 2 is annular or circular steel plate.
When described non-prestressed centrifugal concrete pile was the stake of non-prestressed centrifugal concrete side, described spiral stirrup 4 side's of being spiral stirrups, erection hoop reinforcement 6 side's of being steel hoops, end plate 2 were the outer square or square plate of interior circle.
Above-mentioned non-prestressed main muscle 3 is selected hot rolling II, III grade reinforcing steel or cold-drawn low-carbon wire, heat tempering bar for prestressed concrete, compressor wire and the steel wire that eliminates stress for use.Also the mixing of above-mentioned steel can be used
Non-prestressed centrifugal concrete pile of the present invention, its production method lack with one prestressing force than the production method of pre existing stress centrifugal concrete pile and apply outside the technology, and other is basic identical, mainly comprises: raw material detect; Mold cleaning; Reinforcing cage is made; End plate is installed, welding of non-prestressed main muscle two ends or anchoring; Concrete stirs, cloth; Matched moulds; Thermal curing; The demoulding; Detect.
Thermal curing in the production process comprises: technological means such as maintenance in atmospheric steam curing, steam curing at high pressure, the hot water, improve curing temperature and can quicken hydrated reaction of cement, can improve the overall volume and the C-S-H degree of crystallinity of the C-S-H gel of cement-based material intensity main source, therefore, its demoulding strength also is improved.As C for one of four big mineral of forming cement
3S, the degree of hydration of 1 d is near 20 ℃ of degree of hydrations that temperature is following 3 months under 90 ℃ of temperature.Make production efficiency higher.
Claims (6)
1. non-prestressed centrifugal concrete pile, it is characterized in that comprising centrifugal concrete pile body, non-prestressed main muscle, spiral stirrup, 2 end plates, on spiral stirrup, weld respectively or be anchored on 2 end plates through anchor hole by non-prestressed main muscle two ends to distribution and welding or colligation for described non-prestressed main flaccidity of tendon and muscle.
2. non-prestressed centrifugal concrete pile as claimed in claim 1 is characterized in that also having additional erection hoop reinforcement, and described erection hoop reinforcement is a steel hoop, and spaced apart and welding or colligation are in the spiral stirrup and the non-prestressed main muscle outside with 1m ~ 2m.
3. non-prestressed centrifugal concrete pile as claimed in claim 2, when it is characterized in that described non-prestressed centrifugal concrete pile is non-prestressed centrifugal concrete pipe pile, spiral stirrup is the circle spiral stirrup, and erection hoop reinforcement is the annular reinforcing bar, and end plate is annular or circular steel plate.
4. non-prestressed centrifugal concrete pile as claimed in claim 2, when it is characterized in that described non-prestressed centrifugal concrete pile is the stake of non-prestressed centrifugal concrete side, the spiral stirrup side of being spiral stirrup, the erection hoop reinforcement side of being steel hoop, end plate are the outer square or square plate of interior circle.
5. as claim 1 or 2 or 3 or 4 described non-prestressed centrifugal concrete piles, it is characterized in that described non-prestressed main muscle selects hot rolling II, III grade reinforcing steel or cold-drawn low-carbon wire, heat tempering bar for prestressed concrete, compressor wire and the steel wire that eliminates stress for use.
6. non-prestressed centrifugal concrete pile as claimed in claim 5 is characterized in that its production method comprises: raw material detect; Mold cleaning; Reinforcing cage is made; End plate is installed, welding of non-prestressed main muscle two ends or anchoring; Concrete stirs, cloth; Matched moulds; Centrifugal forming; Thermal curing; The demoulding; Detect.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110031335 CN102071701A (en) | 2011-01-28 | 2011-01-28 | Non-prestressed centrifugal concrete pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110031335 CN102071701A (en) | 2011-01-28 | 2011-01-28 | Non-prestressed centrifugal concrete pile |
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| CN102071701A true CN102071701A (en) | 2011-05-25 |
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| CN 201110031335 Pending CN102071701A (en) | 2011-01-28 | 2011-01-28 | Non-prestressed centrifugal concrete pile |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373702A (en) * | 2011-08-26 | 2012-03-14 | 江苏固丰管桩集团有限公司 | Concrete circular pile and processing method thereof |
| CN103352462A (en) * | 2013-07-30 | 2013-10-16 | 天津建城基业集团有限公司 | Non-pre-stress high-strength centrifugal concrete square pile |
| CN103362118A (en) * | 2013-07-30 | 2013-10-23 | 天津建城基业集团有限公司 | Non-prestressed high-strength centrifugal concrete pipe pile |
| CN104552584A (en) * | 2014-07-28 | 2015-04-29 | 沈中玉 | Concrete continuous and uniform blanking device for pipe pile production |
| CN108517985A (en) * | 2018-05-30 | 2018-09-11 | 重庆建工集团股份有限公司 | A kind of prestressing without bondn steel reinforced concrete wall and its construction method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2659959Y (en) * | 2003-12-05 | 2004-12-01 | 贾燎 | Centrifugal concrete square pile and its moulding forms |
| CN201943079U (en) * | 2011-01-28 | 2011-08-24 | 宿迁市固丰管桩有限公司 | Non-prestress centrifugal concrete pile |
-
2011
- 2011-01-28 CN CN 201110031335 patent/CN102071701A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2659959Y (en) * | 2003-12-05 | 2004-12-01 | 贾燎 | Centrifugal concrete square pile and its moulding forms |
| CN201943079U (en) * | 2011-01-28 | 2011-08-24 | 宿迁市固丰管桩有限公司 | Non-prestress centrifugal concrete pile |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373702A (en) * | 2011-08-26 | 2012-03-14 | 江苏固丰管桩集团有限公司 | Concrete circular pile and processing method thereof |
| CN102373702B (en) * | 2011-08-26 | 2014-06-11 | 江苏固丰管桩集团有限公司 | Concrete circular pile and processing method thereof |
| CN103352462A (en) * | 2013-07-30 | 2013-10-16 | 天津建城基业集团有限公司 | Non-pre-stress high-strength centrifugal concrete square pile |
| CN103362118A (en) * | 2013-07-30 | 2013-10-23 | 天津建城基业集团有限公司 | Non-prestressed high-strength centrifugal concrete pipe pile |
| CN104552584A (en) * | 2014-07-28 | 2015-04-29 | 沈中玉 | Concrete continuous and uniform blanking device for pipe pile production |
| CN108517985A (en) * | 2018-05-30 | 2018-09-11 | 重庆建工集团股份有限公司 | A kind of prestressing without bondn steel reinforced concrete wall and its construction method |
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Application publication date: 20110525 |