CN102121246A - Toughening prestressed centrifugal concrete pile - Google Patents
Toughening prestressed centrifugal concrete pile Download PDFInfo
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- CN102121246A CN102121246A CN 201110031333 CN201110031333A CN102121246A CN 102121246 A CN102121246 A CN 102121246A CN 201110031333 CN201110031333 CN 201110031333 CN 201110031333 A CN201110031333 A CN 201110031333A CN 102121246 A CN102121246 A CN 102121246A
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Abstract
The invention relates to a toughening prestressed centrifugal concrete pile which comprises a centrifugal concrete pile body, a prestressed main reinforcement, spiral hooping, two end plates and prestressed main reinforcement anchoring holes, and further comprises a non-prestressed main reinforcement and non-prestressed main reinforcement anchoring holes. Based on the reinforcement cage of the existing prestressed centrifugal concrete pile, the short anchoring reinforcements arranged on two end plates are changed into long non-prestressed main reinforcements capable of vertically passing through the whole frame so that the centrifugal concrete pile has the advantage of high bearing capacity because of the effect of the prestressed main reinforcement and the advantage of high horizontal bearing capacity because of the effect of the non-prestressed main reinforcement, therefore, the pile can replace the prefabricated solid square pile or on-site concreted pile used in area resisting eight-magnitude earthquake. Simultaneously, the structural design is reasonable, and the existing device and production method for producing the prestressed centrifugal concrete pile can be continue to use completely, therefore, the toughening prestressed centrifugal concrete pile is very easy for popularization, and a new variety is added for concrete piles.
Description
Technical field
The present invention relates to a kind of centrifugal concrete pile, particularly a kind of have on the benchmark of high vertical bearing capacity of single pile, improves the toughening type prestressed centrifugally concrete pile of pile foundation level bearing capacity, belongs to building material field.
Background technology
Concrete is a typical brittleness material, the modulus of elasticity height, and compressive strength and tensile strength do not have linear corresponding relation; And reinforcing bar tensile strength height, good toughness; The combination of steel concrete has made full use of the characteristics of these two kinds of materials self; The application of prestressing technique significantly improves the resistance to tension of reinforced concrete structure, reduces reinforced concrete structure rolled steel dosage and Reinforced Concrete Materials unit weight, helps the development of large-span space structure, highrise building and heavy structure.The fifties in last century, the establishment of international prestressed concrete association (FIP) has promoted the development of countries in the world prestressing techniques, and the prestressed reinforced concrete construction of China also grows up from this period.China Ministry of Railways carried out adopting prestressed concrete sleeper in 1954, and nineteen fifty-five, bridge factory in Fengtai began to manufacture experimently the bridge of 12m span.Prestressed reinforced concrete construction has become a kind of primary structure pattern in China's engineering construction field at present.Prestressed concrete pipe pile is along with prestressing technique is developed gradually in the development of China, and China is worldwide production and uses the maximum country of prestressed concrete pipe pile that its specifications and models also are that the whole world is maximum.China begins to widely apply high-strength prestressed concrete pipe pile (PHC) after the nineties in last century.
Prestressed concrete pipe pile, prestressed concrete square pile and prestressed high-strength concrete pile, side's stake have single pile vertical bearing capacity height, batch production is prefabricated, quality control is easy than site operation, site operation speed fast, the characteristics of reduction building excavations and foundations cost.The used strength grade of concrete of pile body is C60 ~ C80, and the tension of prestressed tendon proof stress is not less than 70% of presstressed reinforcing steel intensity and the equal higher standard value of plasticity.Though strength grade of concrete is higher, presstressed reinforcing steel intensity, plasticity are all better, and still there is the brittle failure problem in prestressed concrete pipe pile, and promptly horizontal bearing capacity is not high, and toughness is relatively poor.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 prestressed concrete pipe pile has different viewpoints, therefore, national standard 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, adopts prefabricated solid side's stake or in situ pile usually.Although the preparation of present prefabricated solid side stake can prefabrication, owing to its from great, generally adopt natural curing technology, production efficiency is low, could at the construction field (site) use to 14 d or 28 d the length of time; The problem of solid side's stake of field fabrication and in situ pile is that concrete quality is difficult to control and guarantees that non-renewable raw material such as sand, stone can not get efficient utilization, causes the wasting of resources, is difficult to guarantee the cleaning construction; And all there are the problem that the steel consumption amount is big, the concrete material consumption is big in solid side's stake or in situ pile, run in the opposite direction with the resource-conserving of China's building materials, the environmentally friendly strategy of sustainable development.
Summary of the invention
The objective of the invention is in order to solve prestressed concrete pipe pile, side's stake brittle failure and the hypodynamic problem of pile foundation horizontal bearing, overcome prefabricated solid side's stake or the big weak point of in situ pile steel use amount, on the basis of the design of reinforcement of pre existing stress centrifugal concrete pile and production process, design a kind of vertical bearing capacity height, improve the pile foundation level bearing capacity simultaneously, make it satisfy the toughening type prestressed centrifugally concrete pile that seismic design of structures requires.
Toughening type prestressed centrifugally concrete pile of the present invention, comprise the centrifugal concrete pile body, prestressing force master muscle, spiral stirrup, 2 end plates and prestressing force master muscle anchor hole, also comprise non-prestressed main muscle and non-prestressed main muscle anchor hole, described prestressing force master muscle anchor hole and non-prestressed main muscle anchor hole are distributed on the end plate successively, prestressing force master muscle and non-prestressed main muscle vertically distribute successively and welding or colligation on spiral stirrup, prestressing force master muscle two ends are anchored at respectively in the prestressing force master muscle anchor hole of 2 end plates, one end of non-prestressed main muscle is anchored in the non-prestressed main muscle anchor hole of 1 end plate, and the other end of non-prestressed main muscle is anchored at after applying prestressing force in the non-prestressed main muscle anchor hole of other 1 end plate again.
Sagging in order to prevent cage of reinforcement, can set up erection hoop reinforcement, described erection hoop reinforcement is a steel hoop, spaced apart and welding or colligation are in spiral stirrup and the prestressing force master muscle and the non-prestressed main muscle outside with 1m ~ 2m.
When described toughening type prestressed centrifugally concrete pile was toughening type prestressed centrifugally concrete tubular pile, 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 toughening type prestressed centrifugally concrete pile was toughening type prestressed centrifugally concrete square pile, the 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.
Toughening type prestressed centrifugally concrete pile of the present invention, the method for its production method and pre existing stress centrifugal concrete pile is basic identical, mainly comprises: raw material detect; Mold cleaning; Reinforcing cage is made; End plate is installed, welding of prestressing force master muscle two ends or anchoring, an end anchoring of non-prestressed main muscle; Concrete stirs, cloth; Matched moulds; Apply prestressing force; The other end welding or the anchoring of non-prestressed main muscle; Centrifugal forming; Thermal curing; The demoulding; Detect.
Toughening type prestressed centrifugally concrete pile of the present invention, mainly be on the basis of the cage of reinforcement of existing prestressed centrifugally concrete pile, change the short anchor rib of installing respectively on the end plate of two into the long non-prestressed main muscle that can vertically run through whole skeleton, make centrifugal concrete pile have the high advantage of vertical bearing capacity because of the effect of prestressing force master muscle, give the pile foundation level bearing capacity high advantage because of the effect of non-prestressed main muscle again, effectively solved prestressed concrete pipe pile, side's stake brittle failure and pile foundation level carry hypodynamic problem, so can replace prefabricated solid side's stake or in situ pile to use in the area of seismic fortification intensity 8 degree.Simultaneously, also because reasonable in design can be continued to use all devices and the production method of existing production prestressed centrifugally concrete pile fully, thus be easy to popularize, for concrete pile has increased new kind.
Description of drawings
Fig. 1 is a kind of structural representation of toughening type prestressed centrifugally concrete pile of the present invention;
Fig. 2 is that prestressing force master muscle and non-prestressed main muscle are distributed in structural representation on the end plate among Fig. 1;
Fig. 3 is the structural representation that is preset in the anchor hole on the end plate.
The specific embodiment
Because of square pilework figure all identical with pile tube omission except that square-outside and round-inside, existing is that the invention will be further described is as follows for example with tube pile structure figure:
Referring to accompanying drawing, 1 among the figure is the centrifugal concrete pile body, the 2nd, and end plate, the 3rd, non-prestressed main muscle, the 4th, prestressing force master muscle, the 5th, spiral stirrup, the 6th, erection hoop reinforcement, the 7th, non-prestressed main muscle anchor hole, the 8th, prestressing force master muscle anchor hole.
Toughening type prestressed centrifugally concrete pile of the present utility model, comprise centrifugal concrete pile body 1, prestressing force master muscle 4, spiral stirrup 5,2 end plates 2 and prestressing force master muscle anchor hole 8, also comprise non-prestressed main muscle 3 and non-prestressed main muscle anchor hole 7, described prestressing force master muscle anchor hole 8 and non-prestressed main muscle anchor hole 7 are distributed on the end plate 2 successively, its structure as shown in Figure 2, vertical successively distribution of prestressing force master muscle 4 and non-prestressed main muscle 3 and welding or colligation are on spiral stirrup 5, its structure as shown in Figure 1, prestressing force master muscle 3 two ends are anchored at respectively in the prestressing force master muscle anchor hole 8 of 2 end plates 2, one end of non-prestressed main muscle 3 is anchored in the non-prestressed main muscle anchor hole 7 of 1 end plate 2, and the other end of non-prestressed main muscle 3 is anchored at after applying prestressing force in the non-prestressed main muscle anchor hole 7 of other 1 end plate 2 again.
Sagging for preventing cage of reinforcement, can have additional erection hoop reinforcement 6, described erection hoop reinforcement 6 is a steel hoop, spaced apart and welding or colligation are in the outside of spiral stirrup 5 and prestressing force master muscle 4 and non-prestressed main muscle 3 with 1m ~ 2m.
When described toughening type prestressed centrifugally concrete pile was toughening type prestressed centrifugally concrete tubular pile, spiral stirrup 5 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 toughening type prestressed centrifugally concrete pile was toughening type prestressed centrifugally concrete square pile, spiral stirrup 5 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.Can also choose and state 2 kinds or multiple reinforcing bar or steel wire mixing use.The apolegamy of prestressing force master muscle 4 is identical with existing apolegamy.
Toughening type prestressed centrifugally concrete pile of the present invention, the method for its production method and pre existing stress centrifugal concrete pile is basic identical, mainly comprises: raw material detect; Mold cleaning; Reinforcing cage is made; End plate is installed, welding of prestressing force master muscle two ends or anchoring, the end welding or the anchoring of non-prestressed main muscle; Concrete stirs, cloth; Matched moulds; Apply prestressing force; The other end welding or the anchoring of non-prestressed main muscle; Centrifugal forming; Thermal curing; The demoulding; Detect.
Thermal curing in the production process comprises: technological means such as atmospheric steam curing, steam curing at high pressure, hot water maintenance, improve curing temperature and can quicken hydrated reaction of cement, 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 highly efficient in productivity.
Claims (6)
1. toughening type prestressed centrifugally concrete pile, comprise the centrifugal concrete pile body, prestressing force master muscle, spiral stirrup, 2 end plates and prestressing force master muscle anchor hole, it is characterized in that also comprising non-prestressed main muscle and non-prestressed main muscle anchor hole, described prestressing force master muscle anchor hole and non-prestressed main muscle anchor hole are distributed on the end plate successively, prestressing force master muscle and non-prestressed main muscle vertically distribute successively and welding or colligation on spiral stirrup, prestressing force master muscle two ends are anchored at respectively in the prestressing force master muscle anchor hole of 2 end plates, one end of non-prestressed main muscle is anchored in the non-prestressed main muscle anchor hole of 1 end plate, and the other end of non-prestressed main muscle is anchored at after applying prestressing force in the non-prestressed main muscle anchor hole of other 1 end plate again.
2. toughening type prestressed centrifugally concrete pile as claimed in claim 1, it is characterized in that also having additional erection hoop reinforcement, described erection hoop reinforcement is a steel hoop, and spaced apart and welding or colligation are in spiral stirrup and the prestressing force master muscle and the non-prestressed main muscle outside with 1m ~ 2m.
3. toughening type prestressed centrifugally concrete pile as claimed in claim 2, when it is characterized in that described toughening type prestressed centrifugally concrete pile is toughening type prestressed centrifugally concrete tubular 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. toughening type prestressed centrifugally concrete pile as claimed in claim 2, when it is characterized in that described toughening type prestressed centrifugally concrete pile is toughening type prestressed centrifugally concrete square pile, 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 toughening type prestressed centrifugally 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. toughening type prestressed centrifugally concrete pile as claimed in claim 5 is characterized in that production method comprises: raw material detect; Mold cleaning; Reinforcing cage is made; End plate is installed, welding of prestressing force master muscle two ends or anchoring, the end welding or the anchoring of non-prestressed main muscle; Concrete stirs, cloth; Matched moulds; Apply prestressing force; The other end welding or the anchoring of non-prestressed main muscle; Centrifugal forming; Thermal curing; The demoulding; Detect.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110031333 CN102121246A (en) | 2011-01-28 | 2011-01-28 | Toughening prestressed centrifugal concrete pile |
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| CN 201110031333 CN102121246A (en) | 2011-01-28 | 2011-01-28 | Toughening prestressed centrifugal concrete pile |
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Cited By (9)
| 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 |
| CN103015406A (en) * | 2012-12-31 | 2013-04-03 | 建华建材（中国）投资有限公司 | Mixed reinforced non-full-circular concrete precast pile |
| CN103103978A (en) * | 2013-02-07 | 2013-05-15 | 江苏固丰管桩集团有限公司 | Partially-prestressed reinforced concrete solid square pile upper segment and manufacturing method thereof |
| CN103437343A (en) * | 2013-08-22 | 2013-12-11 | 大连大金马基础建设有限公司 | Full pre-stressing solid square pile end board |
| CN104005407A (en) * | 2014-06-10 | 2014-08-27 | 山东中能杆塔有限公司 | Partially prestressed concrete structure foundation pile |
| CN104802303A (en) * | 2015-05-06 | 2015-07-29 | 王继忠 | Prefabrication method and construction method of concrete pile |
| CN104963336A (en) * | 2011-08-12 | 2015-10-07 | 朱月琴 | Anti-seismic prefabricated concrete solid square pile and production method thereof |
| CN105735309A (en) * | 2016-04-01 | 2016-07-06 | 江苏东浦管桩有限公司 | Prestressed concrete precast pile in form of mesh reinforcements |
| CN115324045A (en) * | 2022-09-15 | 2022-11-11 | 郑州大学 | Mix reinforcement prestressed pipe pile extension subassembly |
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| CN2387146Y (en) * | 1999-09-17 | 2000-07-12 | 铁道部科学研究院铁道建筑研究所 | Thin wall and light weight tubular pile |
| CN201512787U (en) * | 2009-09-28 | 2010-06-23 | 河南建华管桩有限公司 | Horizontal load-bearing enhancement pre-stressed concrete centrifugal square-sectioned pile |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104963336A (en) * | 2011-08-12 | 2015-10-07 | 朱月琴 | Anti-seismic prefabricated concrete solid square pile and production method thereof |
| 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 |
| CN103015406A (en) * | 2012-12-31 | 2013-04-03 | 建华建材（中国）投资有限公司 | Mixed reinforced non-full-circular concrete precast pile |
| CN103103978A (en) * | 2013-02-07 | 2013-05-15 | 江苏固丰管桩集团有限公司 | Partially-prestressed reinforced concrete solid square pile upper segment and manufacturing method thereof |
| CN103437343A (en) * | 2013-08-22 | 2013-12-11 | 大连大金马基础建设有限公司 | Full pre-stressing solid square pile end board |
| CN104005407A (en) * | 2014-06-10 | 2014-08-27 | 山东中能杆塔有限公司 | Partially prestressed concrete structure foundation pile |
| CN104802303A (en) * | 2015-05-06 | 2015-07-29 | 王继忠 | Prefabrication method and construction method of concrete pile |
| CN105735309A (en) * | 2016-04-01 | 2016-07-06 | 江苏东浦管桩有限公司 | Prestressed concrete precast pile in form of mesh reinforcements |
| CN105735309B (en) * | 2016-04-01 | 2018-03-02 | 江苏东浦管桩有限公司 | A kind of prestressed concrete prefabricated pile of grid form of reinforcement |
| CN115324045A (en) * | 2022-09-15 | 2022-11-11 | 郑州大学 | Mix reinforcement prestressed pipe pile extension subassembly |
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Application publication date: 20110713 |