CN102776879A - Concrete centrifugal square pile and forming mold thereof - Google Patents
Concrete centrifugal square pile and forming mold thereof Download PDFInfo
- Publication number
- CN102776879A CN102776879A CN2012102717310A CN201210271731A CN102776879A CN 102776879 A CN102776879 A CN 102776879A CN 2012102717310 A CN2012102717310 A CN 2012102717310A CN 201210271731 A CN201210271731 A CN 201210271731A CN 102776879 A CN102776879 A CN 102776879A
- Authority
- CN
- China
- Prior art keywords
- pile
- pile body
- concrete
- counterdie
- patrix
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a concrete centrifugal square pile and a forming mold thereof. A pile body is in a square shape, a pile core is a central through hole and is cylindrical, corners of four sides of the pile body are in a stress relieving arc shape, the radius of arcs is the same, the pile body comprises a steel reinforcement cage and concrete, the steel reinforcement cage comprises a main skeleton reinforcement and stirrups, the stirrups are successively welded on the main skeleton reinforcement in a spiral mode, metal end plates which are connected with the steel reinforcement cage are arranged at two ends of the pile body, sleeve hoops are arranged on the connecting portions of the metal end plates and the pile body, and the radii R of the arcs of the corners of the four sides of the pile body are respectively 18mm, 22mm, 26mm and 32mm. The square pile has the advantages that materials are saved, the self weight is light, the square pile is not easy to damage, the tensibility of the pile body is good, the bearing capacity of the pile is large, the service life is long and bending resistance and shearing resistance performances are good. The structural pile of the forming mole is easy to demold, the energy is saved and the carbon emission is reduced.
Description
Technical field
The invention belongs to building field, relate to the improvement of a kind of foundation pile shape and structure in the building field.Specifically, be a kind of concrete offcenter squared pile and moulding form thereof.
Background technology
Existing preformed pile has a lot, if any the solid side's stake of concrete, concrete hollow square pile, prestressed concrete pipe pile, pre-stress hollow square pile etc.The solid side's stake of concrete, concrete hollow square pile are generally non-prestressed prefabricated units, and it is big to produce occupied ground, and it is big to consume the energy, and reinforcing cage is made and mostly concrete formation is manually-operated, and mechanization degree is not high, and quality is difficult for guaranteeing; Anti-bending strength is poor, and lifting, transportation, construction transhipment are prone to cause pile body crack even fracture to occur; The employing shaping of vibrating, strength grade of concrete is generally C30-C40, and the pile body structural bearing capacity is lower, and the external form physical dimension is irregular, is prone in the construction clip broken, and the stake breakage rate is high, less economical.The pile body steel using amount is big, and is uneconomical.Solid in addition side's stake is from great, though hollow square pile adopts the drawing method moulding of loosing core, from heavy and light, other problem still exists.Though pile tube is a centrifugal forming, have the high advantage of concrete strength of pile, pile tube external surface size is little, and the single pile bearing capacity of foundation soil that provides is lower; Bending resistance is not high, stacks to be prone to roll buttress, poor stability.
Pre existing prestressed concrete hollow square pile and moulding form thereof, like Chinese patent " prestress high intensity concrete square pile and manufacturing approach thereof and moulding form ", the patent No. is 200710068545.6, prestress high intensity concrete square pile comprises reinforcing cage, concrete; Its two ends are provided with the square metal end plate that is connected with reinforcing cage, and bevel for welding is established on two square metal end plates, four limits, and central authorities are circular holes, are provided with through wires hole and tension force hole between circular hole and four limits symmetrically; The stirrup of reinforcing cage shape in the shape of a spiral is welded on the main muscle continuously; The profile of pile body and end plate is square, and its four angles are small one and large one two pairs of circular arcs, and its arc chord angle is 90 ° of a pair of arc chord angles, arc radius 25-30mm, and another is to 90 ° of arc chord angles, arc radius 5-10mm; The stake heart is the columnar mesopore identical with end plate central circular hole diameter.The prestress high intensity concrete square pile that the moulding form of this patent of usefulness is processed; Main muscle in the reinforcing cage in its pile body is to be evenly distributed in the concrete of pile body edge; The tension stress that main muscle acts in the concrete in the pile body also is equally distributed; Because the cross section of whole stake is an asymmetrical design, the concrete that the two pairs of arc chord angle places are used is different, causes the concrete cover became uneven of each main muscle outerwrap; Thereby make pile body have open defect, influenced the good looking appearance and the quality of prestressed concrete square pile.Traditional for another example side's stake, tube-sinking cast-in-situ pile etc.It is relatively low to show as bearing capacity of single pile, and bending resistance (drawing) shear behavior is poor, long construction period, and pile quality does not meet designing requirement; Piling well damage in transportation and the use causes the pile concrete durability bad.The preformed pile smooth in appearance, the frictional force of piling and soil layer is little.
Also there be a kind of end that the prestressed centrifugally concrete square pile of end plate is arranged, from heavy and light, material-saving, lifting, convenient transportation, bearing capacity of pile is big.But its main muscle layout is reasonable inadequately, and poor as main muscle, pile body anti-bending strength with prestressed reinforcement or plain bars.End plate four limits do not have the welding groove, have influenced the pile connectivity robustness.The pile body cross section is a quadrangle, and pile body very easily damages for four jiaos in the building operations, causes whole stake to be scrapped, and not only causes waste, but also can influence construction speed.
In addition, at existing pile for prestressed pipe, the pre-stress hollow square pile made, during the mould of operation centrifugal forming, in matched moulds, the demoulding, the easy percussion of running wheel level ground makes the running wheel shape become ellipse.When oval-shaped running wheel rotated on centrifuge, mould is dished out from centrifuge led to a disaster easily.In addition, upper and lower mould all fastens with the tongue and groove groove in the manufacturing process of pile for prestressed pipe, pre-stress hollow square pile, and the matched moulds bolt on the counterdie is through fixing after 180 ° of the artificial upsets of bearing pin again.Because artificial upset bolt is difficult to accurately put in place, causes the matched boards sealing poor, occurs the spillage phenomenon easily in the making moulding, causes product rejection.Centrifugal moulding mould is badly in need of improving.
Summary of the invention
One of the object of the invention provides a kind of concrete offcenter squared pile and moulding form thereof, to reduce or to avoid the existing in prior technology problem, is beneficial to make four limits of pile not fragile, and bearing capacity is high, pile body ductility is good, and the bending resistance shear behavior is good, and production efficiency is high.Two of the object of the invention provides a kind of moulding form that meets the concrete offcenter squared pile of energy-saving and emission-reduction.
For addressing the above problem, the present invention provides a kind of concrete offcenter squared pile, includes pile body; Said pile body profile is square, the stake heart is columnar central through hole, and four limit corners of pile body all are stress and eliminate circular arc, and arc radius equates; Pile body includes reinforcing cage, concrete, and said reinforcing cage comprises skeleton master muscle and stirrup; Said stirrup shape in the shape of a spiral is welded on the said skeleton master muscle continuously, and the two ends of said pile body are provided with the metal end plate that is connected with reinforcing cage; Wherein: said metal end plate and pile body connecting portion are provided with cuff, and the arc radius R of pile body four limit corners is respectively 18mm, 22mm, 26mm, 32mm
A kind of moulding form of concrete offcenter squared pile is provided simultaneously.
Effect of the present invention is that the production mechanization degree is high, and the quality assurance degree is high, owing to adopt hollow shape; Save material more than 30%, from heavy and light, transportation, stacking are conveniently; Not fragile when lifting, transportation, transhipment, die sinking is convenient, the construction breakage rate is low, the pile good in integrity; Pile body bending resistance shear behavior improves more than 40%, and pile body construction length is darker, and the scope of application is wide.The moulding form of offcenter squared pile is provided with alignment pin at patrix and counterdie joint, adopts during with the counterdie matched moulds band spring bolt on the patrix to be fixedly connected with nut on the counterdie at patrix, and patrix and counterdie can accurately be located; Matched moulds is tight when having guaranteed the prestress concrete offcenter squared pile making, simple operation, and labour intensity is low; Production efficiency is high; Be difficult for spillage when centrifugal, the moulding pile body is prone to the demoulding, strong assurance the pile body Forming Quality.
Description of drawings
Fig. 1 is the structural representation of concrete offcenter squared pile of the present invention;
Fig. 2 is the vertical view of concrete offcenter squared pile of the present invention;
Fig. 3 is the schematic cross-section of Fig. 1;
Fig. 4 is the A-A schematic cross-section of Fig. 2;
Fig. 5 is the structural representation of mould of the present invention;
Fig. 6 is that the D of Fig. 5 is to view;
Fig. 7 is the B-B sectional view of Fig. 5;
Fig. 8 is the C-C sectional view of Fig. 5;
Fig. 9 is the partial enlarged drawing at the E position of Fig. 8.
Among the figure:
1, the arm of angle 19, bolt 20, spring 21, axle bush 22, cover box 23, patrix junction plate 24, counterdie junction plate 25, nut cap 26, nut pin 27, nut 28, suspension ring 29, alignment pin in reinforcing cage 2, concrete 3, main muscle 4, stirrup 5, end plate 7, cuff 8, groove 9, flange connecting plate 10, idler pulley 11, reinforcing rib 12, patrix 13, locker 14, counterdie 15, square opening 16, flange hole 17, concrete slurry separate slot 18, the circular arc
The specific embodiment
In conjunction with accompanying drawing and embodiment concrete offcenter squared pile of the present invention and moulding form thereof are explained.
Concrete offcenter squared pile structure of the present invention is, includes pile body, and said pile body profile is square, a stake heart is columnar central through hole; Four limit corners of pile body all are stress and eliminate circular arc, and arc radius equates that pile body includes reinforcing cage 1; Concrete 2; Said reinforcing cage 1 comprises skeleton master muscle 3 and stirrup 4, and said stirrup 4 shape in the shape of a spiral is welded on the said skeleton master muscle 3 continuously, and the two ends of said pile body are provided with the metal end plate 5 that is connected with reinforcing cage 1; Said metal end plate 5 is provided with cuff 7 with the pile body connecting portion, and the arc radius R of pile body four limit corners is respectively 18mm, 22mm, 26mm, 32mm.
The profile of said metal end plate 5 is identical with said pile body profile, and four limits of said metal end plate 5 are provided with bevel for welding 8, and central authorities are circular holes identical with the central through hole diameter of said pile body.Said skeleton master muscle 3 is a rod iron, and said skeleton master muscle 3 is parallel with the pile body outer contour, and said skeleton master muscle 3 is provided with heading with said metal end plate 5 junctions.
Said moulding form includes upper die and lower die and is separately fixed at the locker on the upper and lower mould; The inner chamber cross section of upper die and lower die is all triangular in shape; The moulding form inner chamber cross section that patrix and counterdie fasten back formation is a square; Foursquare four interior angles are the circular arc interior angle that radius equates, different size mould arc radius is respectively 18mm, 22mm, 26mm, 32mm; Said locker includes bolt, nut, when patrix and counterdie matched moulds, through spring bolts and nuts is compressed and matched moulds.
On said patrix and position that counterdie engages, be provided with alignment pin, counterdie is provided with the locating hole corresponding with alignment pin with the position that patrix engages, and alignment pin and locating hole closely cooperate during matched moulds, fixedly the matched moulds position.On the patrix of said patrix and counterdie joint and counterdie, be symmetrically installed with suspension ring respectively.
Concrete offcenter squared pile of the present invention and moulding form function thereof are achieved in that
Like Fig. 1, shown in 3, said concrete offcenter squared pile comprises reinforcing cage 1, concrete 2.Said reinforcing cage 1 comprises skeleton master muscle 3 and stirrup 4, and the stirrup 4 of reinforcing cage shape in the shape of a spiral is welded on the said skeleton master muscle 3 continuously.Said pre-stress hollow square pile profile is square, the stake heart is columnar mesopore, and four limit corners of said concrete offcenter squared pile all are stress and eliminate circular arc, and arc radius equates.Through complicated calculations and the value of the different size stake arc radius that obtains is the most reasonable, be 18mm, be 22mm, be 26mm, be 32mm for prestressed centrifugally side's stake R of 600*600mm for prestressed centrifugally side's stake R of 500*500mm for prestressed centrifugally side's stake R of 450*450mm for prestressed centrifugally side's stake R of 400*400mm.The two ends of said concrete offcenter squared pile are provided with the metal end plate 5 that is connected with said reinforcing cage 1, have further strengthened the intensity of pile crown.Four limits of said metal end plate 5 are provided with bevel for welding 8.
Like Fig. 2, shown in 4, said metal end plate 5 central authorities are and the stake identical circular hole of bore dia in the heart that four limits of said metal end plate 5 are provided with bevel for welding 8.Said metal end plate 5 is provided with cuff 7 with the pile body connecting portion, therefore can further strengthen the intensity of pile crown, avoids when the construction hammering, pile crown being caused damage.The length L of said cuff 7 is 110mm-320mm.It is the convexity of 1-3mm that said cuff 7 is provided with 2 road radiuses at the axial direction along said concrete hollow square pile.
As shown in Figure 5, the concrete offcenter squared pile moulding form comprises patrix 12, counterdie 14; Locker 13; The outside of patrix 12, counterdie 14 is provided with reinforcing rib 11, and patrix 12, counterdie 14 are provided with idler pulley 10, and the two ends of patrix 12, counterdie 14 have fixedly mounted flange connecting plate 9.The inner chamber cross section of counterdie 14 is triangular in shape; Patrix 12 is a square with the moulding form inner chamber that counterdie 14 fastens back formation; Foursquare four interior angles are the circular arc interior angle that radius equates, are 18mm, are 22mm, are 26mm, are 32mm for the prestressed centrifugally side pile die R of 600*600mm for the prestressed centrifugally side pile die R of 500*500mm for the prestressed centrifugally side pile die R of 450*450mm for the prestressed centrifugally side pile die R of 400*400mm.。Symmetry has been installed suspension ring 28 respectively on the patrix 12 of patrix 12 and counterdie 14 joints and counterdie 14.Be provided with alignment pin 29 at patrix 12 and counterdie 14 joints.
As shown in Figure 6, flange connecting plate 9 is provided with square opening 15 and flange hole 16.
As shown in Figure 7; Patrix 12, counterdie 14 are provided with idler pulley 10; The outside of patrix 12, counterdie 14 is provided with reinforcing rib 11; The inner chamber cross section of patrix 12, counterdie 14 is triangular in shape, and patrix 12 is a square with the moulding form inner chamber that counterdie 14 fastens back formation, and the radius R of the arm of angle 18 equates in four circular arcs of foursquare inner chamber.Patrix 12 is provided with concrete slurry separate slot 17 with the joint face of counterdie 14, prevents that effectively the concrete slurry in the foursquare inner chamber from overflowing from the patrix 12 and the mating face of counterdie 14.
As shown in Figure 8, the inner chamber cross section of patrix 12, counterdie 14 patrix 12 triangular in shape is a square with the moulding form inner chamber that counterdie 14 fastens back formation.Patrix 12 is fixedly connected by locker 13 with counterdie 14.The structure of locker 13 is: patrix 12 is provided with patrix junction plate 23, and counterdie 14 is provided with counterdie junction plate 24, is respectively equipped with cover box 22, nut cap 25 on patrix junction plate 23, the counterdie junction plate 24.
As shown in Figure 9, be respectively equipped with cover box 22, nut cap 25 on patrix junction plate 23, the counterdie junction plate 24.Bolt 19 is on locker 13, and spring 20 is positioned on the axle bush 21, and nut cap 25 is on nut 27, and nut pin 26 is through between nut cap 25 and the nut 27.During operation bolt 19 is screwed on nut 27, spring 20 compresses, and gets final product matched moulds.This device can effectively be saved the matched moulds time, has made things convenient for workman's operation, has guaranteed the matched moulds quality.
Concrete offcenter squared pile provided by the present invention and moulding form thereof owing to adopted hollow shape, so material-saving, from heavy and light, pile crown is connected with cuff, makes piling not fragile when the building operations hammering, has improved product pile rate.Concrete offcenter squared pile of the present invention and mould thereof, main muscle is rationally distributed, stirrup in the shape of a spiral shape be welded on the main muscle, pile body ductility is good, become pile capacity big, the bending resistance shear behavior is good.The present invention, end plate has bevel for welding and has also strengthened the fastness that pile connects.Mould of the present invention can effectively have been saved the matched moulds time, has reduced labour intensity, has improved operating efficiency.
Claims (6)
1. a concrete offcenter squared pile includes pile body, and said pile body profile is square, the stake heart is columnar central through hole; Four limit corners of pile body all are stress and eliminate circular arc, and arc radius equates that pile body includes reinforcing cage (1); Concrete (2); Said reinforcing cage (1) comprises skeleton master muscle (3) and stirrup (4), and said stirrup (4) shape in the shape of a spiral is welded on the said skeleton master muscle (3) continuously, and the two ends of said pile body are provided with the metal end plate (5) that is connected with reinforcing cage (1); It is characterized in that: said metal end plate (5) is provided with cuff (7) with the pile body connecting portion, and the arc radius R of pile body four limit corners is respectively 18mm, 22mm, 26mm, 32mm.
2. concrete offcenter squared pile according to claim 1; It is characterized in that: the profile of said metal end plate (5) is identical with said pile body profile; Four limits of said metal end plate (5) are provided with bevel for welding (8), and central authorities are circular holes identical with the central through hole diameter of said pile body.
3. concrete offcenter squared pile according to claim 1 is characterized in that: said skeleton master muscle (3) is a rod iron, and said skeleton master muscle (3) is parallel with the pile body outer contour, and said skeleton master muscle (3) is provided with heading with said metal end plate (5) junction.
4. according to the moulding form of the said concrete offcenter squared pile of claim 1; It is characterized in that: said moulding form includes upper die and lower die and is separately fixed at the locker on the upper and lower mould; The inner chamber cross section of upper die and lower die is all triangular in shape; The moulding form inner chamber cross section that patrix and counterdie fasten back formation is a square, and foursquare four interior angles are the circular arc interior angle that radius equates, different size mould arc radius is respectively 18mm, 22mm, 26mm, 32mm; Said locker includes bolt, nut, when patrix and counterdie matched moulds, through spring bolts and nuts is compressed and matched moulds.
5. according to the moulding form of the said concrete offcenter squared pile of claim 4; It is characterized in that: on said patrix and position that counterdie engages, be provided with alignment pin; Counterdie is provided with the locating hole corresponding with alignment pin with the position that patrix engages; Alignment pin and locating hole closely cooperate during matched moulds, fixedly the matched moulds position.
6. according to the moulding form of the said concrete offcenter squared pile of claim 4, it is characterized in that: on the patrix of said patrix and counterdie joint and counterdie, be symmetrically installed with suspension ring respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102717310A CN102776879A (en) | 2012-08-01 | 2012-08-01 | Concrete centrifugal square pile and forming mold thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102717310A CN102776879A (en) | 2012-08-01 | 2012-08-01 | Concrete centrifugal square pile and forming mold thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102776879A true CN102776879A (en) | 2012-11-14 |
Family
ID=47121975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102717310A Pending CN102776879A (en) | 2012-08-01 | 2012-08-01 | Concrete centrifugal square pile and forming mold thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102776879A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103481364A (en) * | 2013-09-10 | 2014-01-01 | 叶香雄 | Preparation method of high-intensity thin-wall square pile |
| CN106400789A (en) * | 2016-05-23 | 2017-02-15 | 中交第航务工程局有限公司 | Pile toe formwork fixing process |
| CN107932700A (en) * | 2017-12-22 | 2018-04-20 | 建华建材（江苏）有限公司 | Prefabricated high-strength concrete bridge pier and its molding die and manufacture method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101054800A (en) * | 2007-05-11 | 2007-10-17 | 上海中技桩业发展有限公司 | Prestress high intensity concrete square pile and its production method and moulding die |
| CN201835278U (en) * | 2010-08-31 | 2011-05-18 | 上海中技桩业股份有限公司 | Prestressed high-strength concrete square pile |
| CN202745040U (en) * | 2012-08-01 | 2013-02-20 | 天津建城基业集团有限公司 | Prestressed concrete centrifugal square pile and molding die thereof |
-
2012
- 2012-08-01 CN CN2012102717310A patent/CN102776879A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101054800A (en) * | 2007-05-11 | 2007-10-17 | 上海中技桩业发展有限公司 | Prestress high intensity concrete square pile and its production method and moulding die |
| CN201835278U (en) * | 2010-08-31 | 2011-05-18 | 上海中技桩业股份有限公司 | Prestressed high-strength concrete square pile |
| CN202745040U (en) * | 2012-08-01 | 2013-02-20 | 天津建城基业集团有限公司 | Prestressed concrete centrifugal square pile and molding die thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103481364A (en) * | 2013-09-10 | 2014-01-01 | 叶香雄 | Preparation method of high-intensity thin-wall square pile |
| CN103481364B (en) * | 2013-09-10 | 2016-01-20 | 叶香雄 | The preparation method of high-intensity thin-wall square pile |
| CN106400789A (en) * | 2016-05-23 | 2017-02-15 | 中交第航务工程局有限公司 | Pile toe formwork fixing process |
| CN107932700A (en) * | 2017-12-22 | 2018-04-20 | 建华建材（江苏）有限公司 | Prefabricated high-strength concrete bridge pier and its molding die and manufacture method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202745040U (en) | Prestressed concrete centrifugal square pile and molding die thereof | |
| CN100436722C (en) | Prestress high intensity concrete square pile and its production method and moulding die | |
| CN101614013B (en) | Pretensioning prestressed concrete pile, stretch-draw anchoring piece thereof and method for manufacturing stretch-draw anchoring piece | |
| CN103556624B (en) | Adapter sleeve, to produce and method of attachment containing the prefabricated units of this adapter sleeve and prefabricated units | |
| CN102966093B (en) | The prefabricated soldier pile of uneven arrangement of reinforcement and forming method thereof and moulding form | |
| CN101936002B (en) | Prestressed concrete hollow square pile and production method thereof | |
| CN100591855C (en) | Prestressed concrete hollow square pile and its forming mould | |
| CN101914913A (en) | Pretensioned prestressed concrete quadrilateral pile and production method thereof | |
| CN105040685A (en) | Prefabricated member with hollow structure | |
| CN102776879A (en) | Concrete centrifugal square pile and forming mold thereof | |
| CN201330394Y (en) | Prestressed concrete hollow square pile with pile toe | |
| CN101886388B (en) | Pretensioned prestressed concrete polygonal pile and production method thereof | |
| CN102677654A (en) | Rectangular prestressed high-strength concrete pile and forming mold thereof | |
| CN201502181U (en) | Pre-tensioning prestressed concrete pile and tension anchoring part thereof | |
| CN201660886U (en) | Pretensioning prestressed concrete quadrangular pile | |
| CN204780883U (en) | Prefab with hollow structure | |
| CN102758432A (en) | Prestressed concrete hollow square pile and formation die | |
| CN2659959Y (en) | Centrifugal concrete square pile and its moulding forms | |
| CN103938620A (en) | Fast pile connecting method for prestressed concrete precast piles and lock-type connector pile | |
| CN102808404A (en) | Octagonal concrete centrifugal pile and forming mould thereof | |
| CN202730748U (en) | Octagonal concrete centrifugal pile and forming mold thereof | |
| CN202730747U (en) | Prestressed concrete hollow square pile and molding die | |
| CN109457868B (en) | Steel pipe concrete column base joint and construction method thereof | |
| CN110953125A (en) | Prefabricated polygonal prestressed concrete tower cylinder and manufacturing mold of cylinder sections thereof | |
| CN202559337U (en) | Pre-stress high-strength concrete rectangular column and shaping mold |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121114 |