CN103590397B - A kind of partial prestressing part non-prestressed concrete hollow square pile - Google Patents
A kind of partial prestressing part non-prestressed concrete hollow square pile Download PDFInfo
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- CN103590397B CN103590397B CN201210287278.2A CN201210287278A CN103590397B CN 103590397 B CN103590397 B CN 103590397B CN 201210287278 A CN201210287278 A CN 201210287278A CN 103590397 B CN103590397 B CN 103590397B
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Abstract
The present invention relates to a kind of partial prestressing part non-prestressed concrete hollow square pile, its cross-sectional circumference is rounded square or fillet rectangle, inner circumferential is circular, and the outer length of side and interior circular diameter combine according to some, and it is identical in whole y direction cross section geometry.Lengthways main steel bar of the present invention comprises presstressed reinforcing steel and non-prestressing tendon, and according to a certain percentage, layout, according to certain rule, fixes roll welding or colligation connection by stirrup outside main muscle, presstressed reinforcing steel external protection thickness >=40mm, inner protective layer thickness >=35mm to quantity.From stake end meter, 1000-2000mm length is hoop reinforcement, and spacing is 40-70mm, and except encrypted area, two ends, stirrup spacing is 60-100mm.The present invention can effectively improve pile body fragility, improves pile body ductility, improves pile body antidetonation, distortion and mechanical property, can require that higher area is applicable at seismic fortification intensity.
Description
Technical field
The invention belongs to building field, relate to the improvement of foundation pile shape and structure in building field, is a kind of partial prestressing part non-prestressed concrete hollow square pile specifically.
Background technology
The building materials of foundation pile engineering are commercially more, if any pile tube, all kinds of square pile, castinplace pile, drilled pile etc.These pilings are mainly divided into non-prestressed component and the large class of prestressed member two.Non-prestressed component mainly comprises traditional square pile, tube-sinking cast-in-situ pile etc.Show as bearing capacity of single pile relatively low, bending resistance (drawing), shear behavior are poor, and long construction period, pile quality does not meet designing requirement.Prestressed member piling comprises, pile tube, centrifugal prestress square pile etc.Their shortcoming is, often fragility is comparatively large, and shorter to time to rupture from generation cracking, pile body ductility is poor, causing moment building collapsing, making personnel in building not have the sufficient time to escape when there is earthquake.This problem is particularly outstanding in many shakes area such as Japan, Taiwan, China.Most of prefabricated piling mostly is non-prestressed or prestressing force before, and above-mentioned shortcoming is difficult to avoid.
Existing concrete prefabricated units cross section is various, and many on market is square and circular cross-section, and when as carrying reaction members, its maximum object is to improve the pile body bearing capacity that unit materials can provide, thus saving material, reduce costs.The very large feature of preformed pile is a side and soil interaction, utilizes the frictional force between oil and pile to improve pile body bearing capacity.
Circular cross-section is relative and section ratio surface area is relatively little, therefore pile tube does not take advantage in raising frictional force in side-pile; Square pile and soil body frictional force are comparatively large, and bearing capacity ratio pile tube is good, but solid square pile is heavy, feed consumption is many; Hollow square pile combines the advantage of pile tube and square pile preferably, and outer cross section is square, and interior cross section is circular, and can improve frictional force in side-pile comparatively speaking, but its cross section concrete thickness differs, the frictional force of unit volume material is not also not fully exerted.
In the recent period, also occur special-shaped triangular pile, but reinforcement ratio is lower, pile body globality, shearing resistance bending resistance tensile property are difficult to the engineering demand meeting high requirement.
Summary of the invention
For the problems referred to above, main purpose of the present invention is to provide that loss in a kind of building is few, material-saving, partial prestressing part non-prestressed concrete hollow square pile from heavy and light.
The present invention solves above-mentioned technical problem by following technical proposals: a kind of partial prestressing part non-prestressed concrete hollow square pile, described partial prestressing part non-prestressed concrete hollow square pile y direction is provided with the central through hole running through whole partial prestressing part non-prestressed concrete hollow square pile, described partial prestressing part non-prestressed concrete hollow square pile cross-sectional circumference is rounded square or rectangle, inner circumferential is circular, described partial prestressing part non-prestressed concrete hollow square pile is identical in whole y direction sectional dimension, peripheral cross-section size is also identical, described partial prestressing part non-prestressed concrete hollow square pile comprises the main muscle and spiral that extend along hollow square pile length direction around the stirrup of described main muscle, described main muscle comprises presstressed reinforcing steel and non-prestressing tendon, all concrete cover is had inside and outside stirrup, non-prestressing tendon adopts indented bars, presstressed reinforcing steel and non-prestressing tendon composition reinforcing bar all can be positioned at stirrup and surround on rounded square or rectangular angle with on limit, be evenly arranged, outer coagulate layer thickness >=the 40mm of presstressed reinforcing steel, inner concrete layer thickness >=35mm.
In a particular embodiment of the present invention, when described partial prestressing part non-prestressed concrete hollow square pile cross-sectional circumference is rounded square, foursquare side size range is 300mm-550mm, when partially prestressed concrete hollow square pile cross-sectional circumference is fillet rectangle, the side size range of rectangular long limit and minor face is all between 300mm-550mm.
In a particular embodiment of the present invention, described presstressed reinforcing steel diameter is 7.1mm, 9.1mm, 10.7mm or 12.6mm, the screw-thread steel of non-prestressing tendon to be diameter be 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm or 30mm, on the angle that main muscle lays respectively at square or rectangular and on limit, be evenly arranged.
In a particular embodiment of the present invention, described partially prestressed concrete hollow square pile stake end 1000-2000mm is hoop reinforcement, and stirrup spacing is 40-70mm, and except encrypted area, two ends, the stirrup spacing of remainder is 60-100mm.
In a particular embodiment of the present invention, the outer concrete protective layer thickness of described stirrup is 40-55mm.
In a particular embodiment of the present invention, in described rounded square or rectangle, fillet can be one, and can be two, also can be three or perigon angle, radius of corner value be 10-30mm.
In a particular embodiment of the present invention, the concrete model of described indented bars is
.
In a particular embodiment of the present invention, the combination of described main muscle and stirrup be stirrup fix roll welding on main muscle or colligation be connected on main muscle.
Positive progressive effect of the present invention is: partial prestressing part non-prestressed concrete hollow square pile provided by the invention has the following advantages:
(1) feature that the present invention is maximum is that lengthways main steel bar comprises presstressed reinforcing steel and non-prestressing tendon, according to a certain percentage, layout, according to certain rule, fixes roll welding or colligation connection by stirrup outside main muscle to quantity, non-prestressed employing HRB335, HRB400 or HRB500 indented bars, concrete model is
, presstressed reinforcing steel and non-prestressing tendon composition reinforcing bar all can be positioned at stirrup and surround on rounded square or rectangular angle and on limit, be evenly arranged.In conjunction with the common advantage of prestressing force and non-prestressed component, be more suitable for engineer applied.
(2). partial prestressing part non-prestressed concrete hollow square pile provided by the invention, its cross section is square, and sectional area is comparatively large, can effectively improve pile body shear resistance.
(3). partial prestressing part non-prestressed concrete hollow square pile provided by the invention, its cross section is square, and its corner is stress elimination circular arc, so the present invention is easy to shaping at the shaping middle corner of pile body, can effectively improve pile rate.
(4). partial prestressing part non-prestressed concrete hollow square pile provided by the invention, its corner is stress elimination circular arc, so the present invention can effectively eliminate stress concentrated in pile foundation construction process, effectively can improve construction pile rate.
(5). partial prestressing part non-prestressed concrete hollow square pile provided by the invention, its corner is stress elimination circular arc; Main muscle is square distribution, from structure, the main muscle of the present invention is rationally distributed, reinforcing cage in the shape of a spiral stirrup to be welded, make production pile ductility good, become that pile capacity is large, bending resistance shear behavior is good, shock resistance is strong.
(6). partial prestressing part non-prestressed concrete hollow square pile provided by the invention, its corner is stress elimination circular arc; Main muscle is square layout, from structure, the main muscle of the present invention is rationally distributed, stirrup is to be welded in the shape of a spiral for reinforcing cage, and because adding main muscle quantity, the present invention is become relative to like product before, and pile capacity is large, bending resistance shear behavior is good, shock resistance is strong.
(7). partial prestressing part non-prestressed concrete hollow square pile provided by the invention; reinforcing bar external protection thickness is 40-55mm; than before prestressed concrete member protective layer thickness strengthened, the anticorrosion that can be inner reinforcing bar provides better guarantee, thus improves pile body durability.
Accompanying drawing explanation
Fig. 1 is stereogram of the present invention;
Fig. 2 is sectional view of the present invention.
Detailed description of the invention
Present pre-ferred embodiments is provided, to describe technical scheme of the present invention in detail below in conjunction with accompanying drawing.
Fig. 1 is stereogram of the present invention, and Fig. 2 is sectional view of the present invention.
As illustrated in fig. 1 and 2: partial prestressing part non-prestressed concrete hollow square pile provided by the invention, described partial prestressing part non-prestressed concrete hollow square pile y direction is provided with the central through hole running through whole partial prestressing part non-prestressed concrete hollow square pile, described partial prestressing part non-prestressed concrete hollow square pile cross-sectional circumference is rounded square or rectangle, inner circumferential is circular, described partial prestressing part non-prestressed concrete hollow square pile is identical in whole y direction sectional dimension, peripheral cross-section size is also identical, described partial prestressing part non-prestressed concrete hollow square pile comprises the main muscle and spiral that extend along hollow square pile length direction around the stirrup 3 of described main muscle, described main muscle comprises presstressed reinforcing steel and non-prestressing tendon, concrete 2 topping is all had inside and outside stirrup 3, non-prestressing tendon 1 ' adopts indented bars, presstressed reinforcing steel 1 and non-prestressing tendon 1 ' composition reinforcing bar all can be positioned at stirrup and surround on rounded square or rectangular angle with on limit, be evenly arranged, outer coagulate layer thickness >=the 40mm of presstressed reinforcing steel, inner concrete layer thickness >=35mm.
When partial prestressing part non-prestressed concrete hollow square pile cross-sectional circumference is rounded square, foursquare side size range is 300mm-550mm, when partially prestressed concrete hollow square pile cross-sectional circumference is fillet rectangle, the side size range of rectangular long limit and minor face is all between 300mm-550mm.
Presstressed reinforcing steel 1 diameter is 7.1mm, 9.1mm, 10.7mm or 12.6mm, non-prestressing tendon 1 ' for diameter be the screw-thread steel of 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm or 30mm, on the angle that main muscle lays respectively at square or rectangular and on limit, be evenly arranged.
Described partially prestressed concrete hollow square pile stake end 1000-2000mm is hoop reinforcement, and stirrup 3 spacing is 40-70mm, and except encrypted area, two ends, the stirrup spacing of remainder is 60-100mm.The outer concrete protective layer thickness of stirrup is 40-55mm.In described rounded square or rectangle, fillet can be one, and can be two, also can be three or perigon angle, radius of corner value be 10-30mm.The concrete model of described indented bars is
the combination of described main muscle and stirrup be stirrup fix roll welding on main muscle or colligation be connected on main muscle.
Here is specific embodiment:
The invention discloses a kind of partially prestressed concrete hollow square pile, described partially prestressed concrete hollow square pile cross-sectional circumference is rounded square or fillet rectangle, inner circumferential is circular, the outer length of side and interior circular diameter combine according to some, and described partially prestressed concrete hollow square pile is identical in whole y direction cross section geometry.The maximum feature of the present invention is that lengthways main steel bar comprises presstressed reinforcing steel and non-prestressing tendon, according to a certain percentage, layout, according to certain rule, fixes roll welding or colligation connection by stirrup outside main muscle to quantity, non-prestressed employing HRB335, HRB400 or HRB500 indented bars, concrete model is
presstressed reinforcing steel external protection thickness>=40mm, inner protective layer thickness>=35mm.From stake end meter, 1000-2000mm length is hoop reinforcement, and spacing is 40-70mm, and except encrypted area, two ends, stirrup spacing is 60-100mm.
Described partially prestressed concrete hollow square pile, comprises reinforcing cage, concrete; Described reinforcing cage is with steel strand or rod iron for the main muscle of skeleton, and plane is square distribution, and the stirrup of reinforcing cage in the shape of a spiral continuous print is welded on main muscle; It is characterized in that being extended with along its length main muscle and the spiral stirrup around described main muscle; all there is distribution concrete both sides inside and outside reinforcing cage; meet the requirement of reinforced concrete member thickness of concrete cover, concrete lateral cross section periphery is square, and inner circumferential is circular.
When the centrifugal hollow square pile cross section of described partial prestressing is square, the length of side is 300mm, 325mm, 350mm, 375mm, 400mm, 425mm, 450mm, 475mm, 500mm, 525mm, 550mm etc., when cross section is rectangle, for the various combination of the above length of side, corresponding to the following form of its inside diameter ranges.
Described partial prestressing square pile, rod iron is PC rod iron, and nonprestressed reinforcement is HRB335 or HRB400 or HRB500 screw-thread steel, and main muscle lays respectively on foursquare angle and on limit, is evenly arranged.
Described partial prestressing square pile stake end 1000-2000mm is hoop reinforcement, and spacing is 40-70mm, and except encrypted area, two ends, stirrup spacing is 60-100mm.
Described partial prestressing square pile reinforcing bar external protection thickness is 40-55mm, and must not lower than country or industry standard regulation.
The maximum feature of the present invention is that lengthways main steel bar comprises presstressed reinforcing steel and non-prestressing tendon, according to a certain percentage, layout, according to certain rule, fixes roll welding or colligation connection by stirrup outside main muscle to quantity, non-prestressed employing HRB335, HRB400 or HRB500 indented bars, concrete model is
presstressed reinforcing steel and non-prestressing tendon composition reinforcing bar all can be positioned at stirrup and surround on rounded square or rectangular angle and on limit, be evenly arranged.In conjunction with the common advantage of prestressing force and non-prestressed component, be more suitable for engineer applied.
Partial prestressing part non-prestressed concrete hollow square pile provided by the invention, its cross section is square, and sectional area is comparatively large, can effectively improve pile body shear resistance.
Partial prestressing part non-prestressed concrete hollow square pile provided by the invention, its cross section is square, and its corner is stress elimination circular arc, so the present invention is easy to shaping at the shaping middle corner of pile body, can effectively improve pile rate.
Partial prestressing part non-prestressed concrete hollow square pile provided by the invention, its corner is stress elimination circular arc, so the present invention can effectively eliminate stress concentrated in pile foundation construction process, effectively can improve construction pile rate.
Partial prestressing part non-prestressed concrete hollow square pile provided by the invention, its corner is stress elimination circular arc; Main muscle is square distribution, from structure, the main muscle of the present invention is rationally distributed, reinforcing cage in the shape of a spiral stirrup to be welded, make production pile ductility good, become that pile capacity is large, bending resistance shear behavior is good, shock resistance is strong.
Partial prestressing part non-prestressed concrete hollow square pile provided by the invention, its corner is stress elimination circular arc; Main muscle is square layout, from structure, the main muscle of the present invention is rationally distributed, stirrup is to be welded in the shape of a spiral for reinforcing cage, and because adding main muscle quantity, the present invention is become relative to like product before, and pile capacity is large, bending resistance shear behavior is good, shock resistance is strong.
Partial prestressing part non-prestressed concrete hollow square pile provided by the invention; reinforcing bar external protection thickness is 40-55mm; than before prestressed concrete member protective layer thickness strengthened, the anticorrosion that can be inner reinforcing bar provides better guarantee, thus improves pile body durability.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and manual just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and application claims protection domain is defined by appending claims and equivalent thereof.
Claims (2)
1. a partial prestressing part non-prestressed concrete hollow square pile, it is characterized in that: described partial prestressing part non-prestressed concrete hollow square pile y direction is provided with the central through hole running through whole partial prestressing part non-prestressed concrete hollow square pile, described partial prestressing part non-prestressed concrete hollow square pile cross-sectional circumference is rounded square or rectangle, inner circumferential is circular, described partial prestressing part non-prestressed concrete hollow square pile is identical in whole y direction sectional dimension, peripheral cross-section size is also identical, described partial prestressing part non-prestressed concrete hollow square pile comprises the main muscle and spiral that extend along hollow square pile length direction around the stirrup of described main muscle, described main muscle comprises presstressed reinforcing steel and non-prestressing tendon, all concrete cover is had inside and outside stirrup, non-prestressing tendon adopts indented bars, presstressed reinforcing steel and non-prestressing tendon composition reinforcing bar all can be positioned at stirrup and surround on rounded square or rectangular angle with on limit, be evenly arranged, outer coagulate layer thickness >=the 40mm of presstressed reinforcing steel, inner concrete layer thickness >=35mm,
Described partially prestressed concrete hollow square pile stake end 1000-2000mm is hoop reinforcement, and stirrup spacing is 40-70mm, and except encrypted area, two ends, the stirrup spacing of remainder is 60-100mm;
The outer concrete protective layer thickness of described stirrup is 40-55mm;
When described partial prestressing part non-prestressed concrete hollow square pile cross-sectional circumference is rounded square, foursquare side size range is 300mm-550mm, when partially prestressed concrete hollow square pile cross-sectional circumference is fillet rectangle, the side size range of rectangular long limit and minor face is all between 300mm-550mm;
Described presstressed reinforcing steel diameter is 7.1mm, 9.1mm, 10.7mm or 12.6mm, the screw-thread steel of non-prestressing tendon to be diameter be 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm or 30mm, on the angle that main muscle lays respectively at square or rectangular and on limit, be evenly arranged; In described rounded square or rectangle, fillet is one, two, three or perigon angle, and radius of corner value is 10-30mm; The concrete model of described indented bars is
2. partial prestressing part non-prestressed concrete hollow square pile according to claim 1, is characterized in that: the combination of described main muscle and stirrup be stirrup fix roll welding on main muscle or colligation be connected on main muscle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210287278.2A CN103590397B (en) | 2012-08-13 | 2012-08-13 | A kind of partial prestressing part non-prestressed concrete hollow square pile |
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| CN201210287278.2A CN103590397B (en) | 2012-08-13 | 2012-08-13 | A kind of partial prestressing part non-prestressed concrete hollow square pile |
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| CN103590397B true CN103590397B (en) | 2016-03-30 |
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| CN104005407A (en) * | 2014-06-10 | 2014-08-27 | 山东中能杆塔有限公司 | Partially prestressed concrete structure foundation pile |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0931974A (en) * | 1995-07-19 | 1997-02-04 | Railway Technical Res Inst | Mechanism of reinforcing adhesion of reinforcement of reinforced concrete member |
| CN1560380A (en) * | 2004-02-27 | 2005-01-05 | 胡柏英 | Structure of precast rainforced concrete tubular pile and manufacture method thereof |
| JP2006045778A (en) * | 2004-07-30 | 2006-02-16 | Shimizu Corp | Joining structure of pile head part and its construction method |
| CN101851916A (en) * | 2010-06-01 | 2010-10-06 | 上海中技桩业股份有限公司 | Concrete precast pile |
| CN202000338U (en) * | 2011-04-19 | 2011-10-05 | 上海中技桩业股份有限公司 | Hollow square pile of foundation |
| CN102383418A (en) * | 2011-08-12 | 2012-03-21 | 宿迁市固丰管桩有限公司 | Anti-seismic prefabricated concrete solid square pile and production method thereof |
-
2012
- 2012-08-13 CN CN201210287278.2A patent/CN103590397B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0931974A (en) * | 1995-07-19 | 1997-02-04 | Railway Technical Res Inst | Mechanism of reinforcing adhesion of reinforcement of reinforced concrete member |
| CN1560380A (en) * | 2004-02-27 | 2005-01-05 | 胡柏英 | Structure of precast rainforced concrete tubular pile and manufacture method thereof |
| JP2006045778A (en) * | 2004-07-30 | 2006-02-16 | Shimizu Corp | Joining structure of pile head part and its construction method |
| CN101851916A (en) * | 2010-06-01 | 2010-10-06 | 上海中技桩业股份有限公司 | Concrete precast pile |
| CN202000338U (en) * | 2011-04-19 | 2011-10-05 | 上海中技桩业股份有限公司 | Hollow square pile of foundation |
| CN102383418A (en) * | 2011-08-12 | 2012-03-21 | 宿迁市固丰管桩有限公司 | Anti-seismic prefabricated concrete solid square pile and production method thereof |
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