CN102825658B - Inner/outer die double wall body type steel die for pre-stressed concrete special-shaped pile - Google Patents
Inner/outer die double wall body type steel die for pre-stressed concrete special-shaped pile Download PDFInfo
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- CN102825658B CN102825658B CN201210306659.0A CN201210306659A CN102825658B CN 102825658 B CN102825658 B CN 102825658B CN 201210306659 A CN201210306659 A CN 201210306659A CN 102825658 B CN102825658 B CN 102825658B
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Abstract
The invention discloses an inner/outer die double wall body type steel die for a pre-stressed concrete special-shaped pile. The inner/outer die double wall body type steel die comprises an upper die and a lower die which are matched for use, wherein the upper die and the lower die respectively comprises an outer die and an inner die which are arranged in internal and external matching way, the outer die is rigid die, the inner die is a flexible die, the inner surface of the inner die is in fit with the outer surface of the pre-stressed concrete special-shaped pile, an inner die groove is formed on the inner die, a longitudinal tongued-and-grooved rib plate is arranged at a die combination position between the upper die and the lower die, the inner die groove and the outer die are in clearance arrangement, the inner die is deformed with the compression of a pile body when the pre-stressed concrete special-shaped pile is released and expanded, the deformation is absorbed by the inner die groove, and the complete and seamless bulged position of the pile body is ensured. The inner/outer die double wall body type steel die disclosed by the invention has the advantages that a high-rigidity template is used as the outer die, a low-rigidity is used as the inner die, i.e. during the product manufacturing processes such as hoisting, centrifuging and maintaining, the steel die cannot be subjected to deformation, and the generation of crack of the pile body due to over-high rigidity of a die cannot be caused.
Description
Technical field
The present invention relates to Construction Technology field, particularly die apparatus technology, specifically interior external mold double wall body formula punching block for prestressed concrete shaped pile.
Background technology
Pretensioning prestressed concrete pile, because the intensity of pile concrete is high and have certain compressive pre-stress, can bear hammering in pile driving process, and the effect of the various construction external force such as static pressure keeps the intact of pile body.This kind of stake type is high with its bearing capacity of single pile, and pile body is resistance to be beaten, and penetration power is strong, reliable in quality, and the advantage such as unit bearing capacity cost is relatively low, is used widely throughout the country.
The main technique that in centrifugal forming pretensioning prestressed concrete pile manufacture process, compressive pre-stress applies is: deformed bar is weaved into steel reinforcement cage and put into punching block, then concrete is dropped in punching block, the punching block of usining carries out stretch-draw by hydraulic jack etc. to deformed bar as counterforce device, the stretching force applying is born by punching block by being fixed on the anchor plate of punching block both ends of the surface: by centrifugal forming, formed and carried out steam curing after pile body shape and to accelerate concrete strength development, deformed bar and concrete are combined into one: after concrete strength reaches certain requirement, put and open, stretching force is all shifted and born for pile concrete.
At this, put that in a process, to take long 15 meters of stake be example, according to the big or small pile body length of pile concrete compressive pre-stress, there will be the compression of several 1.5-4mm left and right.Because the non-shaped pile of centrifugal forming pretensioning prestressed concrete is (as pile tube, square pile) periphery is without special-shaped projection etc., and punching block inwall is smooth state, and while putting, pile body is separated with punching block inwall after being compressed, in pile body, can there is not crack at pile body in this compression meeting mean allocation.But the punching block that this inwall is level and smooth cannot be produced shaped pile, when the centrifugal forming pretensioning prestressed concrete pile of prior art is produced, with punching block, be national building material industry standard JC/T605-2005[pretensioned prestressed concrete pipe pile punching block] shown in individual layer wall body form.While using the punching block of this type to produce prestressed concrete shaped pile, pile body with projection need form concavity at punching block inwall and can be shaped.In putting a process, when pile compression, because pile body projection is fixed on the compression that punching block inwall concavity portion cannot follow pile body, can produce crack at pile body and pile body projection bound fraction, when serious, even there will be dropping of projection.And pile body cannot be separated with punching block, cause product stripping difficulty.
If significantly reduce the rigidity of punching block, make punching block there is larger deformability, and more than the angle of prestressed concrete shaped pile bossing and pile body is controlled to 150 degree, the height of projection, below 40mm, can reduce the possibility that crack occurs.But such punching block, because rigidity is too low, is difficult to bear prestressed stretching force as counterforce device.And in lifting, centrifugal, in the manufacture course of products such as maintenance, punching block is easily out of shape, and is difficult to meet the requirement of suitability for industrialized production.The prestressed concrete shaped pile bossing that adds manufacturing is too small, has limited the range of application of product.
CN101143465B has proposed a kind of adopt core and the combination of outside upper and lower mould, in upper and lower mould mould inside, except arranging circumferential groove, longitudinal fluting also must be set and reach the requirement that prevents pile body and pile body projection bound fraction generation crack.At pile body, the manufacture difficulty increasing cost that longitudinal bossing has not only increased punching block is set, and under some geological conditions, this part hinders the movement of soil body interstitial water, is unfavorable for improving bearing capacity.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned prior art present situation, and provide a kind of using high rigidity template as adventitia, low rigidity template as inner membrance, both in lifting, centrifugal, in the manufacture course of products such as maintenance, punching block can not be out of shape and can not make because mold stiffness is too high pile body occur the interior external mold double wall body formula punching block for prestressed concrete shaped pile in crack yet.
The present invention solves the problems of the technologies described above adopted technical scheme:
Interior external mold double wall body formula punching block for prestressed concrete shaped pile, include the patrix and the counterdie that are used in conjunction with, wherein, inside and outside patrix and counterdie include, be equipped with external mold and internal mold, external mold is rigid mould, internal mold is flexible die, the outer surface of the inner surface of internal mold and prestressed concrete shaped pile is suitable, and on internal mold, be formed with internal mold groove, patrix and counterdie matched moulds place are provided with longitudinal tongue and groove gusset, internal mold groove and outer die clearance arrange, when putting the stake of tension prestress concrete irregular, internal mold is followed pile compression distortion, and this distortion is absorbed by internal mold groove, guarantee the complete free from flaw of pile body high spot.
For optimizing technique scheme, the measure of taking also comprises:
Above-mentioned internal mold mould is thick is 4 millimeters to 8 millimeters.
Above-mentioned internal mold mould is thick is 5 millimeters to 6 millimeters.
On above-mentioned external mold, be vertically arranged with the longitudinal gusset for Lifting Modules rigidity.
On above-mentioned external mold, hoop is provided with liner plate.
Above-mentioned internal mold longitudinal rib plate thickness is no more than 8 millimeters.
The cell wall of above-mentioned internal mold groove and the die wall angle of internal mold are more than or equal to 120 °, and the groove depth of internal mold groove is 40 millimeters to 150 millimeters.
Above-mentioned external mold mould is thick is more than or equal to 7 millimeters.
Above-mentioned external mold is that continuous tubular steel pipe is connected and fixed and is formed by longitudinal gusset.
Above-mentioned external mold is that the tubular steel pipe of segmentation is connected and fixed and is formed and tubular steel pipe position arranges corresponding to internal mold groove by longitudinal gusset.
Compared with prior art, interior external mold double wall body formula punching block for prestressed concrete shaped pile of the present invention, include the patrix and the counterdie that are used in conjunction with, wherein, inside and outside patrix and counterdie include, be equipped with external mold and internal mold, external mold is rigid mould, internal mold is flexible die, the outer surface of the inner surface of internal mold and prestressed concrete shaped pile is suitable, and on internal mold, be formed with internal mold groove, patrix and counterdie matched moulds place are provided with longitudinal tongue and groove gusset, internal mold groove and outer die clearance arrange, when putting the stake of tension prestress concrete irregular, internal mold is followed pile compression distortion, and this distortion is absorbed by internal mold groove, guarantee the complete free from flaw of pile body high spot.The present invention is a kind of punching block of interior external mold double wall body structure.External mold rigidity is larger, and the rigidity of internal mold is less, and internal mold cavity shape is identical with the outer shape of pile body, and the concavity of internal mold is partly to leave certain space between internal mold groove and outer mold cavity.Anchor plate when punching block both ends of the surface are used for deformed bar stretch-draw need be fixed on the end face of external mold part, and before concrete is unhardened, the prestressed stretch-draw applying advocates to be born by external mold like this.Because the rigidity of internal mold is little, after concrete hardening in putting a process when pile compression, punching block inwall concavity portion can follow the compression of pile body and micro-strain occurs, and this micro-deformation absorbs the gap by between the concavity of internal mold part and outer mold cavity.Guarantee that like this pile body and pile body projection joint portion can not produce crack, pile body is able to separated smoothly with punching block.This strain can disappear at pile body and punching block after separating, and punching block can Reusability and can not produce adverse influence to the serviceability of punching block.
The thickness of internal mold wall body is no more than 8 millimeters, and best thickness is 5 millimeters to 6 millimeters.When thickness is greater than 8 millimeters, the rigidity of internal mold is excessive, is difficult to produce micro-strain, and pile body lug boss cannot be separated with the concavity part of internal mold, and pile body and pile body projection joint portion there will be crack.And the blocked up meeting of thickness causes waste of material.But when thickness is crossed book and is less than 4 millimeters, punching block is in lifting, centrifugally wait easily larger distortion in manufacture course of products, cause pile body deformation, pile body can produce crack.In putting a process, because internal mold distortion is large, easily at pile body and pile body projection joint portion generation stress, concentrate, make on the contrary pile body and punching block be difficult to separated.
Except the longitudinal tongue and groove gusset of patrix and counterdie matched moulds place, internal mold does not configure other longitudinal gussets.If while needing to use longitudinal supporting plate in punching block manufacture process because of technological requirement, its thickness should not be greater than 8 millimeters.Be generally the rigidity that guarantees punching block, as shown in national building material industry standard JC/T605-2005 (pretensioned prestressed concrete pipe pile punching block), the periphery of punching block wall body, except the longitudinal tongue and groove gusset of patrix and counterdie matched moulds place, needs several longitudinal gusset of configuration and wall body welding.Configuring the inwall concavity portion that longitudinal gusset can limit punching block internal mold of the present invention follows the compression of pile body and micro-strain occurs.
The concavity part of internal mold is not less than 120 degree with wall body angulation, and concavity part depth capacity is 40 millimeters to 150 millimeters.The concavity part of internal mold and wall body angulation are less than 120 while spending, and putting a process pile and pile body projection joint portion, easily to produce stress concentrated, cannot guarantee that pile body and punching block are difficult to separated.When concavity part depth capacity is less than 40 millimeters, the centrifugal forming pretensioning prestressed concrete shaped pile of producing loses its engineering application value.When concavity part depth capacity is greater than 150 millimeters, the compression of following pile body due to the inwall concavity portion of punching block internal mold produces excessive deformation, exceeds the regime of elastic deformation of steel, makes this distortion be difficult to be restored, and cannot guarantee the Reusability of punching block.
The present invention have using high rigidity template as adventitia, low rigidity template as inner membrance, both in lifting, centrifugal, in the manufacture course of products such as maintenance, can not be out of shape can be because of the too high advantage that makes pile body occur crack of mold stiffness yet for punching block.
Accompanying drawing explanation
Fig. 1 is the structural representation of first embodiment of the invention;
Fig. 2 is the top view of Fig. 1.
The specific embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
Fig. 1 is to Figure 2 shows that structural representation of the present invention.
Reference numeral is wherein: external mold 1, internal mold 2, internal mold groove 21, patrix 3, counterdie 4, tongue and groove gusset 5, longitudinal gusset 6, liner plate 7.
The first embodiment: as shown in Figure 1 to Figure 2,
Interior external mold double wall body formula punching block for prestressed concrete shaped pile of the present invention, include the patrix 3 and the counterdie 4 that are used in conjunction with, wherein, inside and outside patrix 3 and counterdie 4 include, be equipped with external mold 1 and internal mold 2, external mold 1 is rigid mould, internal mold 2 is flexible die, the outer surface of the inner surface of internal mold 2 and prestressed concrete shaped pile is suitable, and on internal mold 2, be formed with internal mold groove 21, patrix 3 is provided with longitudinal tongue and groove gusset 5 with counterdie 4 matched moulds places, internal mold groove 21 arranges with external mold 1 gap, when putting the stake of tension prestress concrete irregular, internal mold 2 is followed pile compression distortion, and this distortion is absorbed by internal mold groove 21, guarantee the complete free from flaw of pile body high spot.
In embodiment, internal mold 2 moulds are thick is 4 millimeters to 8 millimeters.
In embodiment, internal mold 2 moulds are thick is 5 millimeters to 6 millimeters.
In embodiment, on external mold 1, be vertically arranged with the longitudinal gusset 6 for Lifting Modules rigidity.
In embodiment, on external mold 1, hoop is provided with liner plate 7.
In embodiment, longitudinally gusset 6 thickness are no more than 8 millimeters.
In embodiment, the die wall angle of the cell wall of internal mold groove 21 and internal mold 2 is more than or equal to 120 °, and the groove depth of internal mold groove 21 is 40 millimeters to 150 millimeters.
In embodiment, external mold 1 mould is thick is more than or equal to 7 millimeters.
In embodiment, external mold 1 is connected and fixed and is formed by longitudinal gusset 6 for continuous tubular steel pipe.
The present invention is a kind of punching block of interior external mold 1 double wall body structure.External mold 1 rigidity is larger, and the rigidity of internal mold 2 is less, and internal mold 2 cavity shapes are identical with the outer shape of pile body, and the concavity of internal mold 2 is partly to leave certain space between internal mold groove 21 and external mold 1 inner chamber.Anchor plate when punching block both ends of the surface are used for deformed bar stretch-draw need be fixed on the end face of external mold 1 part, and before concrete is unhardened, the prestressed stretch-draw applying advocates to be born by external mold 1 like this.Because the rigidity of internal mold 2 is little, after concrete hardening in putting a process when pile compression, punching block inwall concavity portion can follow the compression of pile body and micro-strain occurs, and this micro-deformation absorbs the gap by between the concavity of internal mold 2 part and external mold 1 inner chamber.Guarantee that like this pile body and pile body projection joint portion can not produce crack, pile body is able to separated smoothly with punching block.This strain can disappear at pile body and punching block after separating, and punching block can Reusability and can not produce adverse influence to the serviceability of punching block.
The thickness of internal mold 2 wall bodies is no more than 8 millimeters, and best thickness is 5 millimeters to 6 millimeters.When thickness is greater than 8 millimeters, the rigidity of internal mold 2 is excessive, is difficult to produce micro-strain, and pile body lug boss cannot be separated with the concavity part of internal mold 2, and pile body and pile body projection joint portion there will be crack.And the blocked up meeting of thickness causes waste of material.But when thickness is crossed book and is less than 4 millimeters, punching block is in lifting, centrifugally wait easily larger distortion in manufacture course of products, cause pile body deformation, pile body can produce crack.In putting a process, because internal mold 2 distortion are large, easily at pile body and pile body projection joint portion generation stress, concentrate, make on the contrary pile body and punching block be difficult to separated.
Except patrix 3 and the counterdie 4 longitudinal tongue and groove gussets 5 in matched moulds place, internal mold 2 does not configure other longitudinal gussets.If while needing to use longitudinal supporting plate in punching block manufacture process because of technological requirement, its thickness should not be greater than 8 millimeters.Be generally the rigidity that guarantees punching block, as shown in national building material industry standard JC/T605-2005 (pretensioned prestressed concrete pipe pile punching block), the periphery of punching block wall body, except patrix 3 and the counterdie 4 longitudinal tongue and groove gussets 5 in matched moulds place, needs several longitudinal gusset 6 of configuration and wall body welding.The inwall concavity portion that configures longitudinal gusset 6 meeting restriction punching block internal mold 2 of the present invention follows the compression of pile body and micro-strain occurs.
The concavity part of internal mold 2 is not less than 120 degree with wall body angulation, and concavity part depth capacity is 40 millimeters to 150 millimeters.The concavity part of internal mold 2 and wall body angulation are less than 120 while spending, and putting a process pile and pile body projection joint portion, easily to produce stress concentrated, cannot guarantee that pile body and punching block are difficult to separated.When concavity part depth capacity is less than 40 millimeters, the centrifugal forming pretensioning prestressed concrete shaped pile of producing loses its engineering application value.When concavity part depth capacity is greater than 150 millimeters, the compression of following pile body due to the inwall concavity portion of punching block internal mold 2 produces excessive deformation, the regime of elastic deformation that exceeds steel, makes this distortion be difficult to be restored, and cannot guarantee the Reusability of punching block.
The second embodiment:
In embodiment, the tubular steel pipe that external mold 1 is segmentation is connected and fixed and is formed and tubular steel pipe position arranges corresponding to internal mold groove 21 by longitudinal gusset 6.Do not state part with the first embodiment.
Claims (10)
1. interior external mold double wall body formula punching block for prestressed concrete shaped pile, include the patrix (3) and the counterdie (4) that are used in conjunction with, it is characterized in that: inside and outside described patrix (3) and counterdie (4) include, be equipped with external mold (1) and internal mold (2), described external mold (1) is rigid mould, described internal mold (2) is flexible die, the inner surface of described internal mold (2) and the outer surface of prestressed concrete shaped pile are suitable, and on internal mold (2), be formed with internal mold groove (21), described patrix (3) is provided with longitudinal tongue and groove gusset (5) with counterdie (4) matched moulds place, described internal mold groove (21) arranges with external mold (1) gap, when putting the stake of tension prestress concrete irregular, described internal mold (2) is followed pile compression distortion, and this distortion is absorbed by described internal mold groove (21), guarantee the complete free from flaw of pile body high spot.
2. interior external mold double wall body formula punching block for prestressed concrete shaped pile according to claim 1, is characterized in that: described internal mold (2) mould is thick is 4 millimeters to 8 millimeters.
3. interior external mold double wall body formula punching block for prestressed concrete shaped pile according to claim 2, is characterized in that: described internal mold (2) mould is thick is 5 millimeters to 6 millimeters.
4. interior external mold double wall body formula punching block for prestressed concrete shaped pile according to claim 3, is characterized in that: on described external mold (1), be vertically arranged with the longitudinal gusset (6) for Lifting Modules rigidity.
5. interior external mold double wall body formula punching block for prestressed concrete shaped pile according to claim 4, is characterized in that: the upper hoop of described external mold (1) is provided with liner plate (7).
6. interior external mold double wall body formula punching block for prestressed concrete shaped pile according to claim 5, is characterized in that: described longitudinal gusset (6) thickness is no more than 8 millimeters.
7. interior external mold double wall body formula punching block for prestressed concrete shaped pile according to claim 6, it is characterized in that: the cell wall of described internal mold groove (21) and the die wall angle of internal mold (2) are more than or equal to 120 °, and the groove depth of internal mold groove (21) is 40 millimeters to 150 millimeters.
8. interior external mold double wall body formula punching block for prestressed concrete shaped pile according to claim 7, is characterized in that: described external mold (1) mould is thick is more than or equal to 7 millimeters.
9. interior external mold double wall body formula punching block for prestressed concrete shaped pile according to claim 8, is characterized in that: described external mold (1) is connected and fixed and is formed by longitudinal gusset (6) for continuous tubular steel pipe.
10. interior external mold double wall body formula punching block for prestressed concrete shaped pile according to claim 8, it is characterized in that: described external mold (1) forms for the tubular steel pipe of segmentation is connected and fixed by longitudinal gusset (6), and tubular steel pipe position arranges corresponding to internal mold groove (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210306659.0A CN102825658B (en) | 2012-08-27 | 2012-08-27 | Inner/outer die double wall body type steel die for pre-stressed concrete special-shaped pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210306659.0A CN102825658B (en) | 2012-08-27 | 2012-08-27 | Inner/outer die double wall body type steel die for pre-stressed concrete special-shaped pile |
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| CN102825658A CN102825658A (en) | 2012-12-19 |
| CN102825658B true CN102825658B (en) | 2014-08-20 |
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| CN201210306659.0A Active CN102825658B (en) | 2012-08-27 | 2012-08-27 | Inner/outer die double wall body type steel die for pre-stressed concrete special-shaped pile |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105649013A (en) * | 2016-02-23 | 2016-06-08 | 初明进 | Production process for concrete hollow square pile |
| CN107268606A (en) * | 2017-07-21 | 2017-10-20 | 宁乡宁华建材有限公司 | A kind of variable cross-section concrete tubular pile |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5501550A (en) * | 1994-07-11 | 1996-03-26 | Calabrese; Salvatore J. | Pile assembly and method employing external mandrel |
| CN2788999Y (en) * | 2005-04-23 | 2006-06-21 | 泰州海恒建材机械有限责任公司 | Centrifugal concret square pile mould |
| CN201024421Y (en) * | 2007-04-04 | 2008-02-20 | 泰州海恒建材机械有限责任公司 | Centrifugal type concrete pile and forming die |
| CN101143465A (en) * | 2006-09-15 | 2008-03-19 | 周兆弟 | Bar shape tubular pile mould |
| CN202846683U (en) * | 2012-08-27 | 2013-04-03 | 中淳高科桩业股份有限公司 | Double wall type steel die with inside die and outside die for prestressed concrete heterotypic pile |
-
2012
- 2012-08-27 CN CN201210306659.0A patent/CN102825658B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5501550A (en) * | 1994-07-11 | 1996-03-26 | Calabrese; Salvatore J. | Pile assembly and method employing external mandrel |
| CN2788999Y (en) * | 2005-04-23 | 2006-06-21 | 泰州海恒建材机械有限责任公司 | Centrifugal concret square pile mould |
| CN101143465A (en) * | 2006-09-15 | 2008-03-19 | 周兆弟 | Bar shape tubular pile mould |
| CN201024421Y (en) * | 2007-04-04 | 2008-02-20 | 泰州海恒建材机械有限责任公司 | Centrifugal type concrete pile and forming die |
| CN202846683U (en) * | 2012-08-27 | 2013-04-03 | 中淳高科桩业股份有限公司 | Double wall type steel die with inside die and outside die for prestressed concrete heterotypic pile |
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| CN102825658A (en) | 2012-12-19 |
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Effective date of registration: 20180910 Address after: 315145 No. 166 Linjiang Road, Yinzhou Economic Development Zone, Ningbo, Zhejiang Patentee after: Ningbo Zhong Chun hi tech Limited by Share Ltd Address before: 315000 Zhongchun High-tech Pile Co., Ltd. of South Kaihang Road, Yinzhou District, Ningbo City, Zhejiang Province Patentee before: Zhongchun Gaoke Pile Industry Co., Ltd. |