CN202559337U - Pre-stress high-strength concrete rectangular column and shaping mold - Google Patents
Pre-stress high-strength concrete rectangular column and shaping mold Download PDFInfo
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- CN202559337U CN202559337U CN2012202149055U CN201220214905U CN202559337U CN 202559337 U CN202559337 U CN 202559337U CN 2012202149055 U CN2012202149055 U CN 2012202149055U CN 201220214905 U CN201220214905 U CN 201220214905U CN 202559337 U CN202559337 U CN 202559337U
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Abstract
The utility model provides a pre-stress high-strength concrete rectangular column which is shaped as a hollow circular hole tubular rectangular cuboid; the inner angles at the four sides of the cuboid are equal arc corners; the radiuses of the arc corners range from 4mm to 35mm; rectangular end plates with four sides provided with welding slopes are used as the end plates; round holes in concentric and equal circle with the rectangular column are arranged at the centers of the ends plates and are respectively fixed at two ends of the rectangular column; a steel reinforcement cage comprises main ribs and spiral stirrups connected with the main ribs; and two ends of the main ribs are connected with the end plates respectively. The utility model also provides a shaping mold for manufacturing the pre-stress high-strength concrete rectangular column. The rectangular column has the beneficial effects of being good in column body ductility, large in column shaping bearing capacity, good in bending resistance and shearing resistance property, and strong in vibration resistance; the rectangular column is saved in material and light in weight; and the shaping mold of the rectangular column has high frequency vibration while rotating on a centrifuge, thereby being beneficial for improving the density of the concrete inside the mold.
Description
Technical field
The utility model relates to the improvement and the moulding form thereof of architecture Foundation Pit Engineering supporting and protection structure, building, foundation pile shape of structure and structure, stake of particularly a kind of prestress high intensity concrete rectangle and moulding form thereof.
Background technology
Piling as the foundation pile engineering is more on market, and if any pile tube, all kinds of side stake, castinplace pile, drilled pile etc., these pilings mainly divide non-prestressed member and prestressed member two big classes.The prestressed member piling comprises, pile tube, centrifugal prestress square pile etc.Their shortcoming is; The ability of four limit bearing loads is identical, and under actual a lot of operating mode, the bearing load of stake is directive; As in foundation ditch or highrise building; Little then more than needed more in main stress direction drag in another direction, cause bigger waste, there is architectural characteristic and born the unmatched phenomenon of directionality load.This problem is particularly outstanding with the areas that Taiwan, Japan, China etc. shake more in base pit engineering.Non-prestressed member stake comprises, traditional 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.
The bearing capacity of traditional two major axes orientations of foundation pile is identical; But in actual engineering; Its suffered power is different, and the horizontal force vertical and horizontal direction of building has very big-difference, and the both direction greatest differences causes the structural performance of former stake type and suffered load not to match.Especially in the extremely strong Foundation Design of this directionality of pattern foundation pit supporting structure, the conventional piles type is being parallel to the anti-bending bearing capacity that can not give full play to himself on the pattern foundation pit supporting structure direction.
Side's stake is bigger with the frictional force on ground, and the bearing capacity ratio pile tube is big.But solid side's stake is heavy, feed consumption is many.And make hollow, pile body ductility is good, bearing capacity is high, the side stake that the bending resistance shear behavior is good is relatively more difficult.
In addition, when making the mould of concrete square pile, 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 side's stake, again with bolt.Because the matched boards sealing is poor, the spillage phenomenon appears easily in the making moulding, cause product rejection.Centrifugal moulding mould is badly in need of improving.
Summary of the invention
The purpose of the utility model is to remedy above-mentioned said deficiency; Stake of a kind of prestress high intensity concrete rectangle and moulding form thereof are disclosed; It is high to be beneficial to make architectural characteristic and bearing load directionality coupling and bearing capacity of single pile; Horizontal bending resistance shear behavior is good, and shock resistance is strong, more meets the prestress high intensity concrete rectangle stake of energy-saving and emission-reduction.
Another purpose of the utility model is the moulding form that more meets the prestress high intensity concrete rectangle stake of energy-saving and emission-reduction.
For realizing above-mentioned purpose, the design scheme of the utility model provides the stake of a kind of prestress high intensity concrete rectangle, and this rectangle stake includes reinforcing cage, end plate, concrete; Wherein: said rectangle stake is shaped as the rectangular cuboid of hollow round hole tubular, the circular arc corner of cuboid four limit interior angles for equating, and the circular arc knuckle radius is 4-35mm; Said end plate is the rectangle end plate that bevel for welding is established on four limits; End plate central authorities are provided with and the concentric circular hole that waits circle of said rectangle stake; And be separately fixed at the two ends of rectangle stake; Said reinforcing cage includes main muscle and is connected the helical form stirrup on the main muscle, and the two ends of main muscle are connected with end plate respectively, is provided with the symmetry or asymmetricly a plurality of tension force hole and the through wires hole that connect the rectangle stake between the hollow round hole of said two end plates and rectangle stake four limits.
A kind of moulding form of making the stake of prestress high intensity concrete rectangle is provided simultaneously; This mould includes and closes up the upper die and lower die that the back becomes tubulose; Reinforce the stiffener of mould, in order to the bolt of matched moulds, the running wheel that mould is rotated on centrifuge; The gripper shoe of both mold ends is closed up in place and patrix or the counterdie seal groove at mould and to be established sealing ring; Wherein: upper die and lower die inner chamber cross section is " V " font, and upper die and lower die fasten the rear interior cavity cross section and are rectangle, and said inner chamber four limit corners are four jiaos and equate circular arc, arc radius 4-35mm; Establish teeth shape high-frequency line on the described running wheel.
The utility model has the advantages that: existing is that 3.14 units are example with sectional area, and radius of a circle is 1, and the foursquare length of side is 1.772, and the length of side of rectangle is 1 * 3.14, and then corresponding girth is respectively 6.25,7.09,8.28; Corresponding moment of inertia is respectively 0.7854,0.8216,2.5799.Thus; Under the identical condition of sectional area, the lateral area of rectangle has increased by 32.48% than circular lateral area, has increased by 16.78% than square lateral area; The moment of inertia of rectangle has increased by 228.48% than circular moment of inertia, has increased by 214.01% than square moment of inertia.Therefore, the rectangle stake is bigger than the rigidity with the circular stake of sectional area, barrette, bending resistance is high, can bear bigger vertical load and level to load.Equally, when when satisfying identical side friction or moment of inertia, material is then saved in the rectangle stake more, thereby high economic benefit is arranged.
Because stake comprises the design of end plate and moulding form to concrete rectangular, makes the profile of moulding side's stake rectangular, has increased the matching of structural performance and load directionality.In the stronger Foundation Design of directionality, can better bring into play the anti-bending bearing capacity level of himself.And the symmetry of end plate tension force hole and through wires hole and the alternative of asymmetric arrangement make the directionality of structural performance more flexible, can better satisfy the structural performance demand of concrete engineering.
Because the two ends of this rectangle stake are provided with the steel end plate that is connected with reinforcing cage, bevel for welding is established on two rectangle end plates, four limits, and central authorities are circular holes, and is symmetrical or asymmetricly be provided with tension force hole and through wires hole between circular hole and four limits; The stirrup of shape in the shape of a spiral of reinforcing cage is welded on the main muscle continuously; So say from structure; The main muscle of this rectangle stake is rationally distributed, reinforcing cage in the shape of a spiral the shape stirrup to be welded firmly, make in the production pile body ductility good, become that pile capacity is big, the bending resistance shear behavior is good, shock resistance is strong.
Because the two end plates central authorities of rectangle stake are provided with circular hole, the stake heart of concrete rectangular stake is provided with identical columnar mesopore with end plate central circular hole diameter, thus material-saving, from heavy and light.
Establish teeth shape high-frequency line on the running wheel of centrifugal moulding mould, produce high-frequency vibration when centrifugal moulding mould is rotated on centrifuge, it is closely knit especially that concrete can become in mould, is beneficial to improve the density of concrete in mould.Make that the rectangle pile capacity provides, ductility is good, the bending resistance shear behavior is good.
To the fixed length blanking of main muscle material, to a main muscle or a pile integral tension, the helical form stirrup is soldered on the main muscle with seam welder during the rectangle stake of the utility model is made, not only material-saving saves time, and product quality is stepped a stage.
Description of drawings
Fig. 1 is the utility model embodiment 1 overall structure sketch map;
Fig. 2 is the overall structure sketch map of PCB rod iron for the utility model embodiment 2 main muscle;
Fig. 3 is one of end plate sketch map of embodiment 1;
Fig. 4 be embodiment 1 the end plate sketch map two;
Fig. 5 be embodiment 1 the end plate sketch map three;
Fig. 6 is one of end plate sketch map of embodiment 2;
Fig. 7 be embodiment 2 the end plate sketch map two;
Fig. 8 be embodiment 2 the end plate sketch map three;
Fig. 9 is this novel prefabricated concrete rectangle stake centrifugal moulding mould structural representation;
Figure 10 is Fig. 9 A-A sectional view.
Among the figure:
1, end plate 2, bevel for welding 3, tension force hole 4, through wires hole 5, main muscle
6, circular arc 7, cuff 8, concrete pile body 9, stirrup 10, patrix
10 ', counterdie 11, stiffener 12, bolt 13, running wheel 14, gripper shoe
15, sealing ring 16, circular arc 17, high-frequency line
The specific embodiment
Below in conjunction with accompanying drawing embodiment the stake of prestress high intensity concrete rectangle and the moulding form thereof of the utility model are described in further detail.
Prestress high intensity concrete rectangle stake of the utility model and moulding form design philosophy thereof are based on the directionality that has from the rectangle stake and see, its moment of inertia must be bigger than circular and square moment of inertia, sees from the characteristic of rectangle itself; When one timing of stake cross-sectional area; Minimum with circular perimeter, square girth is circular big, and rectangular perimeter is big than square; Promptly under identical concrete amount condition; The square stake can obtain bigger lateral area, thereby can obtain bigger side friction, thereby improves the bearing capacity of stake.
The prestress high intensity concrete rectangle stake of the utility model, this rectangle stake includes reinforcing cage, end plate, concrete; Said rectangle stake is shaped as the rectangular cuboid of hollow round hole tubular, the circular arc corner 6 of cuboid four limit interior angles for equating, and the circular arc knuckle radius is 4-35mm; Said end plate 1 is the rectangle end plate that bevel for welding 2 is established on four limits; End plate 1 central authorities are provided with and the concentric circular hole that waits circle of said rectangle stake; And be separately fixed at the two ends of rectangle stake; Said reinforcing cage includes main muscle 5 and is connected the helical form stirrup on the main muscle 5, and the two ends of main muscle 5 are connected with end plate 1 respectively, is provided with the symmetry or the asymmetricly a plurality of tension force hole 3 and through wires hole 4 that connect the rectangle stake between the hollow round hole of said two end plates 1 and rectangle stake four limits.
Each 3 both sides, tension force hole in said a plurality of tension force hole 3 equally spaced respectively are provided with a through wires hole 4, and each tension force hole 3 links to each other with both sides through wires hole 4 respectively; Reinforcing cage master muscle 5 between the two end plates 1 is parallel with rectangle stake outline line, and main muscle 5 has heading with end plate 1 junction.
The tension force hole 3 and the through wires hole 4 that are provided with symmetrically between the circular hole of described end plate 1 central authorities and rectangle stake four limits, said rectangle stake cross section is rectangle, and through wires hole 4 is a counter sink.
Described end plate 1 is provided with cuff 7 with rectangle stake pile body connecting portion.
The moulding form of the making prestress high intensity concrete rectangle stake of the utility model; This mould includes and closes up patrix 10, the counterdie 10 ' that the back becomes tubulose; Reinforce the stiffener 11 of mould, in order to the bolt 12 of matched moulds, the running wheel 13 that mould is rotated on centrifuge; The gripper shoe 14 of both mold ends is closed up in place and patrix or the counterdie seal groove at mould and to be established sealing ring 15; Patrix 10, counterdie 10 ' inner chamber cross section are " V " font, and patrix 10, counterdie 10 ' fasten the rear interior cavity cross section and be rectangle, and said inner chamber four limit corners are four jiaos and equate circular arc 16, arc radius 4-35mm; Establish teeth shape high-frequency line 17 on the described running wheel.
Like Fig. 1, Fig. 3, Fig. 4, shown in Figure 5, the stake of a kind of prestress high intensity concrete rectangle of present embodiment comprises reinforcing cage, concrete; The two ends of rectangle stake are provided with the steel end plate 1 that is connected with reinforcing cage; Bevel for welding 2 is established on two rectangle end plates, four limits; Central authorities are circular holes; Symmetry or asymmetricly be provided with tension force hole 3 and the through wires hole 4 of both sides, tension force hole between circular hole and four limits, through wires hole and tension force hole can be according to the different symmetries or the asymmetrical layouts of the aspect ratio of square-section, and each 3 both sides, tension force hole respectively is provided with a through wires hole 4 equidistantly.The stirrup 9 of reinforcing cage shape in the shape of a spiral is welded on the main muscle automatically and continuously; The profile of concrete rectangular stake and end plate 1 is rectangular, and its four limits corner is four jiaos and equates circular arc 6 that the stake heart is the columnar mesopore identical with end plate central circular hole diameter.
In order to protect pile body better, avoid pile body when welding concrete excessively be heated and damage when being convenient to heat radiation and pile body in the construction hammering, described two rectangle end plates 1 are provided with cuff 7 with concrete pile body 8 connecting portions.
The rectangular generally layout of through wires hole 4 of symmetry or tension force hole 3 that asymmetricly is provided with and both sides, tension force hole between described end plate 1 central circular hole and four limits is like Fig. 1, Fig. 3, Fig. 4, shown in Figure 5.After making main muscle connect end plate, do not expose through wires hole 4, hit main muscle when avoiding in building operations hammering and appear and make the pile crown explosion, through wires hole 4 designs and produces into counter sink.
The preparation method that embodiment 1 adopts is:
1) end plate at processing rectangle stake two ends: press the end plate designing requirement, like Fig. 3, Fig. 4, shown in Figure 5, the blank of casting, mill flat; Or metal sheet cuts system, punching, mills out groove and stress thereafter and eliminate circular arc, press pattern such as Fig. 3, Fig. 4, shown in Figure 5, car, plane processed finished products;
2) make reinforcing cage: with rod iron is main muscle, the fixed length blanking; To in the shape of a spiral with seam welder, the shape stirrup is welded on the main muscle;
3) reinforcing cage is connected with end plate: pack into mould and end plate of reinforcing cage coupled together; End plate is installed cuff outward; End plate connects the stretch-draw anchor slab of both mold ends, and the stretch-draw anchor slab is connected with gripper shoe again;
4) reinforcing cage is implemented the stretch-draw of prestressing force definite value; Main muscle is implemented definite value stretch-draw with each group two (centre is the tension force hole);
5) to centrifugal moulding mould, like Fig. 9, shown in Figure 10, middle concreting.Centrifugal moulding mould comprises and closes up last 10, the counterdie 10 ' that the back becomes tubulose, the stiffener 11 of reinforcing mould; Bolt 12 in order to matched moulds; The running wheel 13 that mould is rotated on centrifuge, the gripper shoe 14 of both mold ends is closed up in place, patrix or the counterdie seal groove at upper and lower mould and to be established sealing ring 15; Said upper and lower mold cavity cross section is " V " font, and upper and lower mould fastens the rear interior cavity cross section and is rectangle, and its four limits corner is four jiaos and equates circular arc 16, arc radius 4-35mm; Establish teeth shape high-frequency line 17 on the described running wheel.
6) the square pile concrete in the mould is implemented centrifugal rotational forming after closing up mould;
7) stream curing: the pipe die that centrifugal forming is good is put into steam-cured pond, carries out stream curing by the strength grade of concrete requirement;
8) the finished product demoulding: directly in mould, sling.
9) steam press maintenance: pile tube entrucking is again gone into still and is carried out steam curing at high pressure, 180 ℃ ± 3 ℃ of high temperature, pressure 1MPa, in 6-8 hour product.
The product of embodiment 2 is as shown in Figure 2: the stake of a kind of prestress high intensity concrete rectangle comprises reinforcing cage, concrete; The two ends of rectangle stake are provided with the steel end plate 1 ' that is connected with reinforcing cage; Bevel for welding 2 ' is established on two rectangle end plates, four limits; Central authorities are circular holes; Symmetry or asymmetricly be provided with tension force hole 3 ' and through wires hole 4 ' between circular hole and four limits, tension force hole 3 ' and through wires hole 4 ' can be according to the different symmetries or the asymmetrical layouts of the aspect ratio of square-section, and each tension force hole 3 ' links to each other with through wires hole 4 ' separately.
The stirrup 9 ' of reinforcing cage shape in the shape of a spiral is welded on the main muscle 5 ' continuously; The profile of concrete rectangular stake and end plate 1 ' is rectangular, and its four limits corner is four jiaos and equates circular arc 6 ' that the stake heart is the columnar mesopore identical with end plate central circular hole diameter.
In order to protect pile body better, avoid pile body 8 ' when the construction hammering, to damage, described two rectangle end plates 1 ' are provided with cuff 7 ' with concrete pile body 8 ' connecting portion.
Reinforcing cage between the present embodiment two end plates is a skeleton master muscle with the PCB rod iron, and main muscle 5 ' is parallel with side's stake outline line, and prestressed steel bar and end plate junction have heading.
The tension force hole 3 ' and through wires hole 4 ' of symmetry or setting asymmetricly between end plate 1 ' central circular hole and four limits; Tension force hole 3 ' and through wires hole 4 ' can be according to the different symmetries or the asymmetrical layouts of the aspect ratio of square-section, and each tension force hole 3 ' links to each other with through wires hole 4 ' separately.
The tension force hole 3 ' and the rectangular generally layout of through wires hole 4 ' of symmetry or setting asymmetricly between described end plate 1 ' central circular hole and four limits are like Fig. 2, Fig. 6, Fig. 7, shown in Figure 8.After making main muscle connect end plate, do not expose through wires hole, hit main muscle when avoiding in building operations hammering and appear and make the pile crown explosion, through wires hole designs and produces into counter sink.
The preparation method that embodiment 2 adopts is:
1) end plate at processing rectangle stake two ends: press the end plate designing requirement, like Fig. 6, Fig. 7, shown in Figure 8, the blank of casting, mill flat; Or metal sheet cuts system, punching, mills out groove and stress thereafter and eliminate circular arc, press pattern, like Fig. 6, Fig. 7, shown in Figure 8, and car, plane processed finished products;
2) make reinforcing cage: with the PCB rod iron is main muscle, the fixed length blanking; Steel plate end jumping-up; To in the shape of a spiral with seam welder, the shape stirrup is welded on the main muscle;
3) reinforcing cage is connected with end plate: pack into mould and end plate of the reinforcing cage that the PCB rod iron is processed couples together; End plate is installed cuff outward; End plate connects the stretch-draw anchor slab of both mold ends, and the stretch-draw anchor slab is connected with gripper shoe again;
4) reinforcing cage is implemented the stretch-draw of prestressing force definite value; To PCB rod iron master muscle with the stretch-draw of whole stake whole implementation definite value;
5) to centrifugal moulding mould, like Fig. 9, Figure 10, middle concreting.Centrifugal moulding mould comprises, closes up last 10, counterdie 10 ' that the back becomes tubulose; Reinforce the stiffener 11 of mould, in order to the bolt 12 of matched moulds, the running wheel 13 that mould is rotated on centrifuge; The gripper shoe 14 of both mold ends is closed up in place, patrix or the counterdie seal groove at upper and lower mould and to be established sealing ring 15; Upper and lower mold cavity cross section is " V " font, and upper and lower mould fastens the rear interior cavity cross section and is rectangle, and its four limits corner is four jiaos and equates circular arc 16, arc radius 4-35mm; Establish teeth shape high-frequency line 17 on the described running wheel.
6) the square pile concrete in the mould is implemented centrifugal rotational forming after closing up mould.
7) stream curing: the pipe die that centrifugal forming is good is put into steam-cured pond, carries out stream curing by the strength grade of concrete requirement.
8) the finished product demoulding: directly in mould, sling.
9) steam press maintenance: pile tube entrucking is again gone into still and is carried out steam curing at high pressure, 180 ℃ ± 3 ℃ of high temperature, pressure 1MPa, in 6-8 hour product.
More than two embodiment, be the PCB rod iron.
Claims (5)
1. prestress high intensity concrete rectangle stake, this rectangle stake includes reinforcing cage, end plate, concrete; It is characterized in that: said rectangle stake is shaped as the rectangular cuboid of hollow round hole tubular, the circular arc corner (6) of cuboid four limit interior angles for equating, and the circular arc knuckle radius is 4-35mm; Said end plate (1) is the rectangle end plate that bevel for welding (2) is established on four limits; End plate (1) central authorities are provided with and the concentric circular hole that waits circle of said rectangle stake; And be separately fixed at the two ends of rectangle stake; Said reinforcing cage includes main muscle (5) and is connected the helical form stirrup on the main muscle (5); The two ends of main muscle (5) are connected with end plate (1) respectively, are provided with the symmetry or asymmetricly a plurality of tension force hole (3) and the through wires hole (4) that connect the rectangle stake between the hollow round hole of said two end plates (1) and rectangle stake four limits.
2. prestress high intensity concrete rectangle according to claim 1 stake; It is characterized in that: each both sides, tension force hole (3) in said a plurality of tension force holes (3) equally spaced respectively are provided with a through wires hole (4), and each tension force hole (3) links to each other with both sides through wires hole (4) respectively; Reinforcing cage master muscle (5) between the two end plates (1) is parallel with rectangle stake outline line, and main muscle (5) has heading with end plate (1) junction.
3. prestress high intensity concrete rectangle according to claim 1 and 2 stake; It is characterized in that: the tension force hole (3) and the through wires hole (4) that are provided with symmetrically between the circular hole of described end plate (1) central authorities and rectangle stake four limits; Said rectangle stake cross section is rectangle, and through wires hole (4) is a counter sink.
4. prestress high intensity concrete rectangle according to claim 1 stake is characterized in that: described end plate (1) is provided with cuff (7) with rectangle stake pile body connecting portion.
5. moulding form of making the stake of prestress high intensity concrete rectangle; This mould includes and closes up patrix (10), the counterdie (10 ') that the back becomes tubulose; Reinforce the stiffener (11) of mould, in order to the bolt (12) of matched moulds, the running wheel (13) that mould is rotated on centrifuge; The gripper shoe of both mold ends (14) is closed up in place and patrix or the counterdie seal groove at mould and to be established sealing ring (15); It is characterized in that: patrix (10), counterdie (10 ') inner chamber cross section are " V " font, and patrix (10), counterdie (10 ') fasten the rear interior cavity cross section and be rectangle, and said inner chamber four limit corners are four jiaos and equate circular arc (16), arc radius 4-35mm; Establish teeth shape high-frequency line (17) on the described running wheel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012202149055U CN202559337U (en) | 2012-05-14 | 2012-05-14 | Pre-stress high-strength concrete rectangular column and shaping mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202149055U CN202559337U (en) | 2012-05-14 | 2012-05-14 | Pre-stress high-strength concrete rectangular column and shaping mold |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677654A (en) * | 2012-05-14 | 2012-09-19 | 天津建城基业集团有限公司 | Rectangular prestressed high-strength concrete pile and forming mold thereof |
| CN103061334A (en) * | 2013-01-08 | 2013-04-24 | 孔超 | I-section prestressed reinforced concrete support pile by centrifugal pouring |
-
2012
- 2012-05-14 CN CN2012202149055U patent/CN202559337U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677654A (en) * | 2012-05-14 | 2012-09-19 | 天津建城基业集团有限公司 | Rectangular prestressed high-strength concrete pile and forming mold thereof |
| CN103061334A (en) * | 2013-01-08 | 2013-04-24 | 孔超 | I-section prestressed reinforced concrete support pile by centrifugal pouring |
| CN103061334B (en) * | 2013-01-08 | 2015-06-17 | 孔超 | I-section prestressed reinforced concrete support pile by centrifugal pouring |
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Granted publication date: 20121128 |
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