CN100436722C - Prestress high intensity concrete square pile and its production method and moulding die - Google Patents
Prestress high intensity concrete square pile and its production method and moulding die Download PDFInfo
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- CN100436722C CN100436722C CNB2007100685456A CN200710068545A CN100436722C CN 100436722 C CN100436722 C CN 100436722C CN B2007100685456 A CNB2007100685456 A CN B2007100685456A CN 200710068545 A CN200710068545 A CN 200710068545A CN 100436722 C CN100436722 C CN 100436722C
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- 239000004567 concrete Substances 0.000 title claims abstract description 123
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000000465 moulding Methods 0.000 title claims description 42
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 40
- 239000010959 steel Substances 0.000 claims abstract description 40
- 230000003014 reinforcing effect Effects 0.000 claims description 78
- 210000003205 muscle Anatomy 0.000 claims description 73
- 229910000754 Wrought iron Inorganic materials 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 238000012423 maintenance Methods 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 8
- 238000004080 punching Methods 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 4
- 239000003351 stiffener Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 11
- 230000002787 reinforcement Effects 0.000 abstract description 7
- 230000008030 elimination Effects 0.000 abstract description 4
- 238000003379 elimination reaction Methods 0.000 abstract description 4
- 238000007493 shaping process Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000011372 high-strength concrete Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 description 31
- 230000006378 damage Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 238000005452 bending Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- WLJVNTCWHIRURA-UHFFFAOYSA-N pimelic acid Chemical compound OC(=O)CCCCCC(O)=O WLJVNTCWHIRURA-UHFFFAOYSA-N 0.000 description 5
- 230000035939 shock Effects 0.000 description 4
- 239000011513 prestressed concrete Substances 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
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- 238000005485 electric heating Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
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- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention belongs to the architecture field, which relates to an improvement with the foundation pile shape and the structure and the manufacturing method of the foundation pile and the foundation pile shaper in the architecture field, in particular the invention is a prestressing force high strength concrete square pile and the manufacturing method thereof and the shaping device. In the invention a square terminal plate is disposed on the two ends of the square pile, and the four sides of the terminal plate is provided with a groove, while the center is equipped with a circular hole, and between the circular hole and the four sides, a strain hole and a threading hole are arranged symmetrically; a stirrp of a reinforcement cage in a twist is welded on the principal reinforcement continuously, wherein the principal reinforcement is the steel strand or the steel bar; the concrete square pile and the four-side corners of the terminal plate are in a stress elimination arc, and the pile core is a columnar mid level outlet having the same diameter with the terminal plate central circular hole. The manufacturing method is characterized in that, the principal reinforcement has the fix ed length and blanking, and the stirrp of the reinforcement cage is welded in the seam welder with the high degree of mechanisation; the principal reinforcement is stretched in a group of a whole pile fixed value, wherein the stretching performance is good and the balance is consistent; the disposable high pressure has short shaping time, low energy consumption, high product grade; the die design meets with the shaping requirement of the shape, which is convenient to use.
Description
Technical field
The invention belongs to building field, relate to improvement and the manufacture method of foundation pile and the moulding utensil of foundation pile of a kind of foundation pile shape and structure in the building field.Specifically, be a kind of prestress high intensity concrete square pile and manufacture method thereof and moulding form.
Background technology
Piling as the foundation pile engineering is more on market, 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, often fragility is bigger, and is shorter from the time to rupture that ftractures, and pile body ductility is relatively poor, causes the moment building collapsing when earthquake takes place, and makes that personnel do not have the adequate time escape in the building.This problem in Taiwan, the areas of many shakes such as Japan, China are particularly outstanding.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.
Problems such as in the manufacture craft of hollow concrete side's stake, the ubiquity mechanization degree is not high, and equipment and technology are backward.As, with the manual stirrup of pricking, this not only influences operating efficiency when making reinforcing cage, and more seriously the fastness of the stirrup of Zhaing own is not enough, has slip leeway, can directly influence the concrete pile quality.And for example, the main muscle of reinforcing cage not being implemented stretch-draw maybe will line up the reinforcing cage of row and implement stretch-draw together.As, the patent No. is, ZL99116046.0, and name is called " a kind of prestress square pile and manufacture method thereof " patented technology and claims, " a plurality of cages are end to end; the panel and the main muscle of stake cage link to each other with drag hook, are arranged in craspedodrome, and every end of going the stake cage is fixed on fixedly concrete seat; head end equipment tractive; make a cage simultaneous tension generation prestressing force of embarking on journey, the stake cage combines the formation pile cutoff with concrete through vibration compacting in fixing template, and the panel by upper and lower pile cutoff between the pile cutoff welds pile." this patented technology is exactly that the reinforcing cage of lining up row is implemented stretch-draw together.It is poor that making certainly will make main muscle percent of elongation uniformity like this, cause a little less than the concrete pile flexing resistance, even will middle fracture or distortion in the dress handling is defeated.In addition, the patent No. is, ZL99116046.0, and name is called " a kind of prestress square pile and manufacture method thereof " patented technology, does not explain the maintenance to concrete pile, and maintenance also is an important ring that guarantees the concrete pile quality in fact.And the patent No. is, ZL200320116232.0, and name is called " a kind of centrifugal concrete square pile and moulding form " patented technology and claims, " place a pipe die; the two ends plate at reinforcing cage and two ends is placed wherein, pour concrete, another piece pipe die closes; and use the bolt fastening; and then be put in centrifugal dehydration on the centrifuge, promptly form centrifugal concrete square pile, steam-cured again to more than the C40; as to take off mill, steam pressure or natural curing again to more than the C80." use this method of curing, when steam-cured, need 70C ° of temperature, 7 hours times spent; Steam when pressing, need temperature more than 180C °, 10 hours times spent.Reach during twice maintainer more than 17 hours, energy consumption is also especially big.In addition, centrifugal concrete square pile through twice steam-cured, pile body is through cold-hot-cold and hot-cold, twice above temperature acute variation constructed inside concrete and is subjected to certain destruction.
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, the good side's stake of bearing capacity height, bending resistance shear behavior is difficulty relatively.Chinese patent, the patent No. is: ZL200420080467.3, name is called, " centrifugal side's stake mould "; The patent No. is: ZL200520071098.6, name is called, " centrifugal concrete square pile mould ", all be the centrifugal pile tube mould of imitation on centrifuge at a high speed rotation make offcenter squared pile, make and make offcenter squared pile and become reality.But there is common shortcoming in they: the former is that upper and lower mold cavity cross section is an isosceles right triangle, fastens the back quadrate.The latter is, upper and lower mold cavity cross section is a rectangle, also quadrate behind the fastening.The square offcenter squared pile that such shaping mould is made into, Qi Sijiao very easily damages in the hammering of building operations, causes offcenter squared pile to be scrapped equally.Be that when centrifuge drive mould rotated, because the running wheel smooth surface, the simple rotation gone back deficiency so that the concrete in the mould is very closely knit in addition.This side's of making stake firmness is not enough.
In addition, when making the mould of concrete square pile, operation centrifugal forming, in matched moulds, the demoulding, the as easy as rolling off a log percussion of running wheel ground makes the running wheel shape become ellipse.When oval-shaped running wheel rotates on centrifuge, easily mould is dished out and led to a disaster from centrifuge.In addition, the upper and lower mould of two patented technologies all fastens with the tongue and groove groove, 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.
Having improved as centrifugal moulding mould, is good; But also have another problem to be: when side's stake is thick especially, centrifuge power has not overcome its weight, and along with the stake type increases, centrifugal meeting causes pile body ectonexine concrete delamination, concrete delamination can seriously undermine the pile body axial bearing capacity, the oversized centrifugal concrete square pile of the incompatible making of centrifugal casting.And traditional shake is smash the stake of formula system stake legal system and was just existed shake to smash inhomogeneous impermeable problem originally, makes oversized so centrifugal concrete square pile and can cause the serious layering of concrete up and down equally, more can not adopt, and this difficult problem is anxious treats that people go solution.
Summary of the invention
The present invention's purpose is to remedy above-mentioned described deficiency, to society pile rate height in a kind of making is disclosed, pile body ductility is good, the bearing capacity of single pile height, horizontal bending resistance shear behavior is good, shock resistance is strong, in the building loss few, material-saving, from the prestress high intensity concrete square pile of heavy and light.
Another object of the present invention is that to disclose a kind of making pile body ductility to society good, and the bearing capacity of single pile height, horizontal bending resistance shear behavior is good, shock resistance is strong, in the building loss few, material-saving, from the method for the prestress high intensity concrete square pile of heavy and light.
A further object of the invention is that openly to make pile body ductility to society good, and the bearing capacity of single pile height, horizontal bending resistance shear behavior is good, shock resistance is strong, in the building loss few, material-saving, from the moulding form of the prestress high intensity concrete square pile of heavy and light.
Design scheme of the present invention is achieved in that
A kind of prestress high intensity concrete square pile comprises, reinforcing cage, concrete; It is characterized in that the two ends of side's stake are provided with the metal end plate that is connected with reinforcing cage, bevel for welding is established on two square endplates, 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 concrete square pile and end plate is square, and its four limits corner is stress and eliminates circular arc, 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.
Reinforcing cage between the described two end plates is a skeleton master muscle with steel strand or rod iron, when the reinforcing cage between the two end plates with steel strand is skeleton master muscle, through wires hole that is provided with symmetrically between end plate central circular hole and four limits and tension force hole are the hole symmetries on two relative edges, and each both sides, tension force hole respectively is provided with a through wires hole equidistantly; When the reinforcing cage between the two end plates with the rod iron was skeleton master muscle, through wires hole that is provided with and tension force hole were the hole symmetries on the two relative limits between end plate central circular hole and four limits, symmetrically, and each tension force hole links to each other with through wires hole separately; Main muscle is parallel with side's stake outline line; Steel strand and end plate junction are threaded, and rod iron and end plate junction have heading.
Tension force hole that is provided with symmetrically between the circular hole of described end plate central authorities and four limits and through wires hole be square generally layout or rounded layout, through wires hole is a counter sink.
Described end plate and concrete pile body connecting portion are provided with cuff.
A kind of manufacture method of prestress high intensity concrete square pile, it may further comprise the steps:
1) end plate at processing side stake two ends: by end plate designing requirement casting blank, mill flat; Or metal sheet cuts system, punching, mills out groove and stress thereafter and eliminate circular arc, press figure sample car, plane processed finished products;
2) make reinforcing cage: with steel strand or rod iron is main muscle, the fixed length blanking; With steel strand end car filament mouth, rod iron 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 steel strand or rod iron are made 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;
5) fluid concrete in mould;
6) the square pile concrete in the mould is implemented centrifugal rotational forming after closing up mould;
7) maintenance: disposable high pressure moulding in airtight high-pressure bottle;
8) the finished product demoulding: directly in mould, sling.
The manufacture method of another kind of prestress high intensity concrete square pile, it may further comprise the steps:
1) end plate at processing side stake two ends: by end plate designing requirement casting blank, mill flat; Or metal sheet cuts system, punching, mills out groove and stress thereafter and eliminate circular arc, press figure sample car, plane processed finished products;
2) make reinforcing cage: with steel strand or rod iron is main muscle, the fixed length blanking; With steel strand end car filament mouth, rod iron 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 steel strand or rod iron are made 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;
5) close up prestress high intensity concrete square pile vibrating forming mould, then fluid concrete in this mould;
6) the square pile concrete in the shake mould is implemented vibrating forming;
7) maintenance: disposable high pressure moulding in airtight high-pressure bottle;
8) the finished product demoulding: directly in mould, sling.
When described reinforcing cage is implemented the stretch-draw of prestressing force definite value, steel strand master muscle is implemented definite value stretch-draw with two of each groups; To rod iron master muscle with the stretch-draw of whole stake whole implementation definite value.
Described disposable high pressure moulding is that autoclave (existing equipment is migrated) airtight, high pressure is put in the die strip stake, at high temperature 170C °-185C °, under the pressure 1MPA, is finished product in 4 hours.
A kind of centrifugal moulding mould of making prestress high intensity concrete square pile, comprise, close up the upper and lower mould that the back becomes tubulose, reinforce the stiffener of mould, snap close in order to matched moulds, the running wheel that mould is rotated on centrifuge, the gripper shoe 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; It is characterized in that, upper and lower mold cavity cross section is " V " font, and upper and lower mould fastens the rear interior cavity cross section and is square, and its four limits corner is stress and eliminates circular arc, wherein a pair of arc chord angle is 90 °, arc radius 25-30MM, and another is 90 °, arc radius 5-10MM to arc chord angle; Establish teeth shape high-frequency line on the described running wheel.
Establishing several in the described centrifugal moulding mould protects running wheels, guarantee production safety, diameter to take turns greater than the vacation of running wheel.
The another kind of vibrating forming mould of making prestress high intensity concrete square pile, it is characterized in that, it comprises, intracavity section is square, integral body is the die body (23) of cuboid, four limit corners of inner chamber square sectional are stress and eliminate circular arc, wherein a pair of arc chord angle is 90 °, arc radius 25-30MM, another is 90 ° to arc chord angle, arc radius 5-10MM, be installed in the electromagnetic shaker on die body bottom and the dual-side, die body two, its diameter is consistent with side's stake medium pore, blow vent of closing wherein, connect two blow vents, the inflation sebific duct that internal diameter is identical with the medium pore of hollow concrete side's stake, the charging at two die body tops, exhaust opening, the reinforcing rib that is provided with on the die body.
The die body of described vibrating forming mould comprises, base plate, but vertically with base plate be provided with, from the side plate of base plate dual-side folding.
Advantage of the present invention is:
Because, concrete square pile comprised the design of end plate and moulding form the profile of moulding side's stake is square, its four limits corner is stress and eliminates circular arc, so the present invention's pile body in building operations phenomenon seldom occurs damaging for four jiaos, pile rate and pile utilization rate extra-high-speed.
Because the two ends of side's stake of the present invention are provided with the metal end plate that is connected with reinforcing cage, bevel for welding is established on two square endplates, 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 shape in the shape of a spiral of reinforcing cage is welded on the main muscle continuously, so on structure, master's muscle of the present invention 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 concrete square pile are provided with circular hole, the stake heart of concrete square pile is provided with identical columnar mesopore with end plate central circular hole diameter, so material-saving of the present invention is from heavy and light.
Because four limit corners of moulding form square inner chamber are stress and eliminate circular arc, pile is not fragile in the building operations hammering, has improved product pile rate.
Establish teeth shape high-frequency line on the running wheel of centrifugal moulding mould, when being rotated, centrifugal moulding mould produces high-frequency vibration on centrifuge, it is closely knit especially that concrete can become in mould, and centrifugal pile capacity improves, ductility is good, the bending resistance shear behavior is good thereby make.
Many electromagnetic shakers of vibrating forming mould (electromagnetic shaker is established every a segment distance in mold bottom and both sides) shake simultaneously, impel the moulding of concrete original place, mould size and place can be arranged as required, and the size of hollow square pile and weight can not be restricted fully.Many electromagnetic shakers shake the density of also having guaranteed concrete structure simultaneously, have avoided traditional shake mode of smashing to cause the weakness of the serious layering of concrete again simultaneously, thereby have guaranteed the good bearing capacity and the bending resistance shear behavior of large-scale super-huge hollow pile.Vibrating forming mould cuboid, as the frame of individual big shape, therefore, when making the stake of hollow concrete side, pan feeding and manufactured goods lifting depanning are all very convenient, and this is very important to making super-huge stake.
In the side of the present invention stake preparation method to the fixed length blanking of main muscle material, to main muscle by a group stretch-draw or a pile integral tension, the helical form stirrup is soldered on the main muscle with seam welder, not only material-saving saves time, and product quality is stepped a stage.
Come concrete square pile is implemented the disposable high pressure moulding with the autoclave of artificial preparation water-gas in the curing procedure transfer, with the top stake, temperature 170C °-185C °, pressure 1MPA was a finished product in 4 hours with 32 of curing in the mold of autoclave.Than twice maintenance: 4,5 of maintenances, shorten significantly on man-hour, energy consumption reduces significantly, and the pile quality of disposable maintenance are much improved at 17 hours times spent.
Description of drawings
Fig. 1 is the embodiment of the invention 1 an overall structure schematic diagram (main muscle is steel strand);
Fig. 2 is the embodiment of the invention 2 overall structure schematic diagrames (main muscle is steel strand);
Fig. 3 is the embodiment of the invention 3 overall structure schematic diagrames (main muscle is the PCB rod iron);
Fig. 4 is the embodiment of the invention 4 overall structure schematic diagrames (main muscle is the PCB rod iron);
Fig. 5 is the tip plate configurations schematic diagram of embodiment 1;
Fig. 6 is the tip plate configurations schematic diagram of embodiment 2;
Fig. 7 is the tip plate configurations schematic diagram of embodiment 3;
Fig. 8 is the tip plate configurations schematic diagram of embodiment 4;
Fig. 9 is a prestressed concrete square pile centrifugal moulding mould structural representation of the present invention;
Figure 10 is Fig. 9 A-A sectional view.
Figure 11 is a prestressed concrete square pile vibrating forming mould structure schematic diagram of the present invention;
Figure 12 is Figure 11 lateral view;
But Figure 13 is a prestressed concrete square pile vibrating forming mould side plate folding schematic diagram of the present invention, schematic diagram when wherein dotted portion represents that side plate is opened.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
A kind of prestress high intensity concrete square pile of present embodiment comprises, reinforcing cage, concrete; The two ends of side's stake are provided with the metal end plate 1 (Fig. 5) that is connected with reinforcing cage, bevel for welding 2 is established on two square endplates, four limits, central authorities are circular holes, be provided with the through wires hole 5 of tension force hole 4 and both sides, tension force hole between circular hole and four limits symmetrically, through wires hole of She Zhiing and tension force hole are the hole symmetries on two relative edges symmetrically, and each 4 both sides, tension force hole respectively is provided with a through wires hole 5 equidistantly.The stirrup 9 of reinforcing cage shape in the shape of a spiral is welded on the main muscle continuously; The profile of concrete square pile and end plate 1 is square, and its four limits corner is stress and eliminates circular arc 3, and the stake heart is the columnar mesopore identical with end plate central circular hole diameter.
In order to protect pile body 8 round angles not ftracture, do not damage, described side's stake and end plate four limit corners are stress elimination circular arc, and wherein a pair of arc chord angle is that 90 ° of arc radius are 26MM, another is that 90 ° of arc radius are 6MM to arc chord angle.
In order to protect pile body better, avoid pile body when the construction hammering, to damage, described two square endplates 1 are provided with cuff 6 with concrete pile body 8 connecting portions.
Reinforcing cage between the described two end plates is skeleton master muscle 7 with steel strand, and main muscle is parallel with side's stake outline line, and steel strand and end plate junction are threaded.
The tension force hole 4 that is provided with symmetrically between described end plate 1 central circular hole and four limits and the through wires hole 5 of both sides, the tension force hole layout (Fig. 1,5) that is square generally.Do not expose through wires hole after making main muscle connect end plate, hit main muscle when avoiding in building operations hammering and appear and make main muscle advance to split, through wires hole designs and produces into counter sink.
The preparation method that embodiment 1 adopts is:
1) end plate at processing side stake two ends: by end plate designing requirement (Fig. 5) cast blank, mill flat; Or metal sheet cuts system, punching, mills out groove and stress thereafter and eliminate circular arc, press pattern (Fig. 5) car, plane processed finished products;
2) make reinforcing cage: with steel strand is main muscle, the fixed length blanking; With steel strand end car filament mouth; 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 steel strand are made couples together; Under the end plate, a side stake two ends place installs cuff; 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; Steel strand master muscle is implemented definite value stretch-draw with each group two (centre is the tension force hole);
5) fluid concrete in centrifugal moulding mould (Fig. 9,10).Centrifugal moulding mould, comprise, the upper and lower mould 11,11 ' that closes up back one-tenth tubulose is reinforced the stiffener 13 of mould, snap close 18 in order to matched moulds, the running wheel 14 that mould is rotated on centrifuge, the gripper shoe 15 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 17; It is characterized in that, upper and lower mold cavity cross section is " V " font, upper and lower mould fastens the rear interior cavity cross section and is square, its four limits corner is stress and eliminates circular arc 19, its arc chord angle is 90 °, arc radius 5-30MM, wherein a pair of arc chord angle is 90 °, arc radius 26MM, and another is 90 °, arc radius 6MM to arc chord angle; Establish teeth shape high-frequency line 16 on the described running wheel.
Establishing several in the centrifugal moulding mould protects running wheels, guarantee production safety, diameter to take turns 12 greater than the vacation of running wheel.
6) the square pile concrete in the mould is implemented centrifugal rotational forming after closing up mould;
7) maintenance: disposable high pressure moulding in airtight high-pressure bottle: 32 pile band moulds are put into autoclave airtight, high pressure, at high temperature 170C °-185C °, under the pressure 1MPA, are finished product in 4 hours.
8) the finished product demoulding: directly in mould, sling.
A kind of prestress high intensity concrete square pile of present embodiment comprises, reinforcing cage, concrete; The two ends of side's stake are provided with the metal end plate 1 (Fig. 6) that is connected with reinforcing cage, bevel for welding 2 is established on two square endplates, four limits, central authorities are circular holes, be provided with the through wires hole 5 of tension force hole 4 and both sides, tension force hole between circular hole and four limits symmetrically, through wires hole of She Zhiing and tension force hole are the hole symmetries on two relative edges symmetrically, and each 4 both sides, tension force hole respectively is provided with a through wires hole 5 equidistantly.The stirrup 9 of reinforcing cage shape in the shape of a spiral is welded on the main muscle continuously; The profile of concrete square pile and end plate 1 is square, and its four limits corner is stress and eliminates circular arc 3, and the stake heart is the columnar mesopore identical with end plate central circular hole diameter.
In order to protect pile body 8 round angles not ftracture, do not damage, described side's stake and end plate four limit corners are stress elimination circular arc, and wherein a pair of arc chord angle is that 90 ° of arc radius are 25MM, another is that 90 ° of arc radius are 5MM to arc chord angle.
In order to protect pile body better, avoid pile body when the construction hammering, to damage, described two square endplates 1 are provided with cuff 6 with concrete pile body 8 connecting portions.
Reinforcing cage between the described two end plates is skeleton master muscle 7 with steel strand, and main muscle is parallel with side's stake outline line, and steel strand and end plate junction are threaded.
The tension force hole 4 that is provided with symmetrically between described end plate 1 central circular hole and four limits and the rounded generally layout of through wires hole 5 (Fig. 2,6) of both sides, tension force hole.Do not expose through wires hole after making main muscle connect end plate, hit main muscle when avoiding in building operations hammering and appear and make main muscle advance to split, through wires hole designs and produces into counter sink.
The preparation method that embodiment 2 adopts is:
1) end plate at processing side stake two ends: by end plate designing requirement (Fig. 6) cast blank, mill flat; Or metal sheet cuts system, punching, mills out groove and stress thereafter and eliminate circular arc, press pattern (Fig. 6) car, plane processed finished products;
2) make reinforcing cage: with steel strand is main muscle, the fixed length blanking; With steel strand end car filament mouth; 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 steel strand are made 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; Steel strand master muscle is implemented definite value stretch-draw with each group two (centre is the tension force hole);
5) fluid concrete in centrifugal moulding mould (Fig. 9,10).Centrifugal moulding mould, comprise, close up the upper and lower mould 11,11 ' that the back becomes tubulose, reinforce the stiffener 13 of mould, snap close 18 in order to matched moulds, the running wheel 14 that mould is rotated on centrifuge, the gripper shoe 15 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 17; It is characterized in that, upper and lower mold cavity cross section is " V " font, upper and lower mould fastens the rear interior cavity cross section and is square, its four limits corner is stress and eliminates circular arc 19, its arc chord angle is 90 °, arc radius 5-30MM, wherein a pair of arc chord angle is 90 °, arc radius 25MM, and another is 90 °, arc radius 5MM to arc chord angle; Establish teeth shape high-frequency line 16 on the described running wheel.
Establishing several in the centrifugal moulding mould mould protects running wheels, guarantee production safety, diameter to take turns (12) greater than the vacation of running wheel.
6) the square pile concrete in the mould is implemented centrifugal rotational forming after closing up mould;
7) maintenance: disposable high pressure moulding in airtight high-pressure bottle: 32 pile band moulds are put into autoclave airtight, high pressure, at high temperature 170C °-185C °, under the pressure 1MPA, are finished product in 4 hours.
8) the finished product demoulding: directly in mould, sling.
The product of embodiment 3 is as shown in Figure 3: a kind of prestress high intensity concrete square pile comprises reinforcing cage, concrete; It is characterized in that, the two ends of side's stake are provided with the metal end plate 1 ' that is connected with reinforcing cage, bevel for welding 2 ' is established on two square endplates, four limits, central authorities are circular holes, be provided with through wires hole 5 ' and tension force hole 4 ' between circular hole and four limits symmetrically, through wires hole of She Zhiing and tension force hole are the hole symmetries on two relative edges symmetrically, and each tension force hole 4 ' links to each other with through wires hole 5 ' separately.
The stirrup 9 ' of reinforcing cage shape in the shape of a spiral is welded on the main muscle 7 ' continuously; The profile of concrete square pile and end plate 1 ' is square, and its four limits corner is stress and eliminates circular arc 3 ', and the stake heart is the columnar mesopore identical with end plate central circular hole diameter.
In order to protect pile body 8 ' round angle not ftracture, do not damage; described side's stake and end plate four limit corners are stress and eliminate circular arc; wherein a pair of arc chord angle is that 90 ° of arc radius are 30MM, another is that 90 ° of arc radius are that 10MM is in order to protect pile body better to arc chord angle; avoid pile body 8 ' to damage when the construction hammering, described two square endplates and concrete pile body connecting portion are provided with cuff 6 '.
Reinforcing cage between the present embodiment two end plates is a skeleton master muscle with the PCB rod iron, and main muscle 7 ' is parallel with side's stake outline line, and prestressed steel bar and end plate junction have heading.
Through wires hole 5 ' that is provided with symmetrically between end plate 1 ' central circular hole and four limits and tension force hole 4 ' are the hole symmetries on two relative edges, and each tension force hole links to each other with through wires hole separately.
Tension force hole 4 ' that is provided with symmetrically between described end plate central circular hole and four limits and the through wires hole 5 ' layout that is square generally.Do not expose through wires hole after making main muscle connect end plate, hit main muscle when avoiding in building operations hammering and appear and make main muscle advance to split, through wires hole designs and produces into counter sink.
The preparation method that embodiment 3 adopts is:
1) end plate at processing side stake two ends: by end plate designing requirement (Fig. 7) cast blank, mill flat; Or metal sheet cuts system, punching, mills out groove and stress thereafter and eliminate circular arc, press pattern (Fig. 7) car, plane processed finished products;
2) make reinforcing cage: with the PCB rod iron is main muscle, fixed length blanking, rod iron 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 made 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) close up prestress high intensity concrete square pile vibrating forming mould fluid concrete in mould: because of making big specification concrete square pile, the 4th step reinforcing cage is implemented promptly to close up prestress high intensity concrete square pile vibrating forming mould after the stretch-draw of prestressing force definite value, fluid concrete in this mould is implemented vibrating forming to the square pile concrete in the vibrations mould more earlier.
Prestress high intensity concrete square pile vibrating forming mould comprises, intracavity section (the Figure 11 that is square, 12,13), integral body is the die body 23 of cuboid, four limit corners of inner chamber square sectional are stress and eliminate circular arc, its arc chord angle is 90 °, arc radius 5-30MM, wherein a pair of arc chord angle 71 is 90 °, arc radius 30MM, another is 90 ° to arc chord angle 72, arc radius 10MM, be installed in the electromagnetic shaker 24 on die body bottom and the dual-side, die body two, its diameter is consistent with side's stake medium pore, blow vent of closing 21 wherein, connect two blow vents, the inflation sebific duct 25 that internal diameter is identical with the medium pore of hollow concrete side's stake, the charging at two die body tops, exhaust opening 26, the reinforcing rib 22 that is provided with on the die body.
The die body of prestress high intensity concrete square pile vibrating forming mould comprises, base plate 32, but vertically with base plate be provided with, from the side plate 31 of base plate dual-side folding.
During operation, ready reinforcing cage is put into mould (Figure 11,12,13), thereafter, charging, exhaust opening pan feeding at the mould top.The inflation sebific duct that begins to connect two blow vents is soft, and after adding concrete in the mould, the inflation sebific duct is inflated, and the inflation sebific duct stretches immediately.Because the internal diameter of inflation sebific duct is identical with the mesopore of hollow concrete side's stake, so the side stake central authorities after the moulding can stay the columnar mesopore that adheres to specification.Inflation sebific duct venting behind side's forming pile, pull out deliquescing the inflation sebific duct get final product.During depanning, relieving mould wherein pair of side plates just can conveniently lift by crane.
Mould of the present invention also can be designed to the supernumerary segment lengthening, makes the hollow square pile that the model equal length differs to adapt to.Four limit corners of the square inner chamber that forms are stress and eliminate circular arc, and pile is not fragile in the building operations hammering, has improved product pile rate.
6) the square pile concrete in the prestress high intensity concrete square pile vibrating forming mould is implemented vibrating forming.
7) maintenance: disposable high pressure moulding in airtight high-pressure bottle: 32 pile band moulds are put into autoclave airtight, high pressure, at high temperature 170C °-185C °, under the pressure 1MPA, are finished product in 4 hours.
8) the finished product demoulding: directly in mould, sling.
A kind of prestress high intensity concrete square pile comprises, reinforcing cage, concrete; It is characterized in that, the two ends of side's stake are provided with the metal end plate 1 ' that is connected with reinforcing cage, bevel for welding 2 ' is established on two square endplates, four limits, central authorities are circular holes, be provided with through wires hole 5 ' and tension force hole 4 ' between circular hole and four limits symmetrically, through wires hole of She Zhiing and tension force hole are the hole symmetries on two relative edges symmetrically, and each tension force hole 4 ' links to each other with through wires hole 5 ' separately.
The stirrup 9 ' of reinforcing cage shape in the shape of a spiral is welded on the main muscle 7 ' continuously; The profile of concrete square pile and end plate 1 ' is square, and its four limits corner is stress and eliminates circular arc 3 ', and the stake heart is the columnar mesopore identical with end plate central circular hole diameter.
In order to protect pile body 8 ' round angle not ftracture, do not damage, described side's stake and end plate four limit corners are stress elimination circular arc, and wherein a pair of arc chord angle is that 90 ° of arc radius are 28MM, another is that 90 ° of arc radius are 8MM to arc chord angle.In order to protect pile body better, avoid pile body 8 ' when the construction hammering, to damage, described two square endplates and concrete pile body connecting portion are provided with cuff 6 '.
Reinforcing cage between the present embodiment two end plates is a skeleton master muscle with the PCB rod iron, and main muscle 7 ' is parallel with side's stake outline line, and prestressed steel bar and end plate junction have heading.
Through wires hole 5 ' that is provided with symmetrically between end plate 1 ' central circular hole and four limits and tension force hole 4 ' are the hole symmetries on two relative edges, and each tension force hole links to each other with through wires hole separately.
The tension force hole 4 ' and the rounded generally layout of through wires hole 5 ' that are provided with symmetrically between described end plate central circular hole and four limits.Do not expose through wires hole after making main muscle connect end plate, hit main muscle when avoiding in building operations hammering and appear and make main muscle advance to split, through wires hole designs and produces into counter sink.
The preparation method that embodiment 4 adopts is:
1) end plate at processing side stake two ends: by end plate designing requirement (Fig. 8) cast blank, mill flat; Or metal sheet cuts system, punching, mills out groove and stress thereafter and eliminate circular arc, press pattern (Fig. 8) car, plane processed finished products;
2) make reinforcing cage: with the PCB rod iron is main muscle, fixed length blanking, rod iron 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 rod iron is made couples together; Under the end plate, a side stake two ends place installs cuff; 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 rod iron master muscle with the stretch-draw of whole stake whole implementation definite value.
5) close up prestress high intensity concrete square pile vibrating forming mould fluid concrete in mould: because of making big specification concrete square pile, quadruple pass preface reinforcing cage is implemented promptly to close up prestress high intensity concrete square pile vibrating forming mould (as Figure 11,12,13) after the stretch-draw of prestressing force definite value, fluid concrete in this mould is implemented vibrating forming to the square pile concrete in the vibrations mould more earlier.
Prestress high intensity concrete square pile vibrating forming mould comprises, intracavity section is square (as Figure 11,12,13), integral body is the die body 23 of cuboid, four limit corners of inner chamber square sectional are stress and eliminate circular arc, its arc chord angle is 90 °, arc radius 5-30MM, wherein a pair of arc chord angle 71 is 90 °, arc radius 28MM, another is 90 ° to arc chord angle 72, arc radius 8MM, be installed in the electromagnetic shaker 24 on die body bottom and the dual-side, die body two, its diameter is consistent with side's stake medium pore, blow vent of closing 21 wherein, connect two blow vents, the inflation sebific duct 25 that internal diameter is identical with the medium pore of hollow concrete side's stake, the charging at two die body tops, exhaust opening 26, the reinforcing rib 22 that is provided with on the die body.
The die body of prestress high intensity concrete square pile vibrating forming mould comprises, base plate 32, but vertically with base plate be provided with, from the side plate 31 of base plate dual-side folding.
During operation, ready reinforcing cage is put into mould, thereafter, charging, exhaust opening pan feeding at the mould top.The inflation sebific duct that begins to connect two blow vents is soft, and after adding concrete in the mould, the inflation sebific duct is inflated, and the inflation sebific duct stretches immediately.Because the internal diameter of inflation sebific duct is identical with the mesopore of hollow concrete side's stake, so the side stake central authorities after the moulding can stay the columnar mesopore that adheres to specification.Inflation sebific duct venting behind side's forming pile, pull out deliquescing the inflation sebific duct get final product.During depanning, relieving mould wherein pair of side plates just can conveniently lift by crane.
Mould of the present invention also can be designed to the supernumerary segment lengthening, makes the hollow square pile that the model equal length differs to adapt to.Four limit corners of the square inner chamber that forms are stress and eliminate circular arc, and pile is not fragile in the building operations hammering, has improved product pile rate.
6) the square pile concrete in the prestress high intensity concrete square pile vibrating forming mould is implemented vibrating forming.
7) maintenance: disposable high pressure moulding in airtight high-pressure bottle: 32 pile band moulds are put into autoclave airtight, high pressure, at high temperature 170C °-185C °, under the pressure 1MPA, are finished product in 4 hours.
8) the finished product demoulding: directly in mould, sling.
More than four embodiment, preceding two main muscle is steel strand, latter two is the PCB rod iron; Use the centrifugal mold moulding for preceding two, latter two needs only a stake size specification and meets with the vibrations mold forming, and two kinds of moulding forms are interchangeable.
Can also implement maintenance to concrete square pile with another method.This method is: finished product is promptly produced in the demoulding in steam-cured 4 hours under 75C °-85C ° (steam or electric heating) temperature of concrete square pile band mould.But its quality is more a bit weaker than high-pressure steaming and cultivating.
Claims (12)
1, a kind of prestress high intensity concrete square pile comprises, reinforcing cage, concrete; It is characterized in that the two ends of side's stake are provided with the metal end plate (1) that is connected with reinforcing cage, bevel for welding (2) is established on two square endplates, four limits, and central authorities are circular holes, are provided with through wires hole (5) and tension force hole (4) 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 (7) continuously; The profile of concrete square pile and end plate is square, and its four limits corner is stress and eliminates circular arc (3), 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.
2, prestress high intensity concrete square pile according to claim 1, it is characterized in that, reinforcing cage between the described two end plates is a skeleton master muscle (7) with steel strand or rod iron, when the reinforcing cage between the two end plates (1) with steel strand is skeleton master muscle (7), the through wires hole (5) that is provided with symmetrically between end plate (1) central circular hole and four limits and tension force hole (4) are the hole symmetries on two relative edges, and each both sides, tension force hole (4) respectively is provided with a through wires hole (5) equidistantly; When the reinforcing cage between the two end plates (1) with the rod iron was skeleton master muscle, the through wires hole (5) that is provided with and tension force hole (4) were the hole symmetries on the two relative limits between end plate central circular hole and four limits, symmetrically, and each tension force hole links to each other with through wires hole separately; Main muscle is parallel with side's stake outline line; Steel strand and end plate junction are threaded, and rod iron and end plate junction have heading.
3, prestress high intensity concrete square pile according to claim 1 and 2, it is characterized in that, tension force hole (4) that is provided with symmetrically between the circular hole of described end plate (1) central authorities and four limits and through wires hole (5) be square generally layout or rounded layout, through wires hole (5) is an individual counter sink.
4, prestress high intensity concrete square pile according to claim 1 is characterized in that, described end plate (1) is provided with cuff (6) with concrete pile body connecting portion.
5, a kind of manufacture method of prestress high intensity concrete square pile, it may further comprise the steps:
1) end plate at processing side stake two ends: by end plate designing requirement casting blank, mill flat; Or metal sheet cuts system, punching, mills out groove and stress thereafter and eliminate circular arc, press figure sample car, plane processed finished products;
2) make reinforcing cage: with steel strand or rod iron is main muscle, the fixed length blanking; With steel strand end car filament mouth, rod iron 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 steel strand or rod iron are made 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;
5) fluid concrete in mould;
6) the square pile concrete in the mould is implemented centrifugal rotational forming after closing up mould;
7) maintenance: disposable high pressure moulding in airtight high-pressure bottle;
8) the finished product demoulding: directly in mould, sling.
6, a kind of manufacture method of prestress high intensity concrete square pile, it may further comprise the steps:
1) end plate at processing side stake two ends: by end plate designing requirement casting blank, mill flat; Or metal sheet cuts system, punching, mills out groove and stress thereafter and eliminate circular arc, press figure sample car, plane processed finished products;
2) make reinforcing cage: with steel strand or rod iron is main muscle, the fixed length blanking; With steel strand end car filament mouth, rod iron 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 steel strand or rod iron are made 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;
5) close up prestress high intensity concrete square pile vibrating forming mould, then fluid concrete in this mould;
6) the square pile concrete in the shake mould is implemented vibrating forming;
7) maintenance: disposable high pressure moulding in airtight high-pressure bottle;
8) the finished product demoulding: directly in mould, sling.
7, according to the manufacture method of claim 5 or 6 described prestress high intensity concrete square piles, it is characterized in that, when described reinforcing cage is implemented the stretch-draw of prestressing force definite value, steel strand master muscle is implemented definite value stretch-draw with two of each groups; To rod iron master muscle with the stretch-draw of whole stake whole implementation definite value.
8, according to the manufacture method of claim 5 or 6 described prestress high intensity concrete square piles, it is characterized in that described disposable high pressure moulding is that autoclave airtight, high pressure is put in the die strip stake, at high temperature 170C °-185C °, under the pressure 1MPA, be finished product in 4 hours.
9, a kind of centrifugal moulding mould of making prestress high intensity concrete square pile, comprise, close up the upper and lower mould (11,11 ') that the back becomes tubulose, reinforce the stiffener (13) of mould, snap close (18) in order to matched moulds, the running wheel (14) that mould is rotated on centrifuge, the gripper shoe of both mold ends (15) is closed up at upper and lower mould and to be established sealing ring (17) in place, patrix or the counterdie seal groove; It is characterized in that, upper and lower mold cavity cross section is " V " font, and upper and lower mould fastens the rear interior cavity cross section and is square, and its four limits corner is stress and eliminates circular arc (19), wherein a pair of arc chord angle is 90 °, arc radius 25-30MM, and another is 90 °, arc radius 5-10MM to arc chord angle; Establish teeth shape high-frequency line (16) on the described running wheel.
10, the centrifugal moulding mould of making prestress high intensity concrete square pile according to claim 9 is characterized in that, establishes several in the described mould and protects running wheels, guarantee production safety, diameter to take turns (12) greater than the vacation of running wheel.
11, a kind of vibrating forming mould of making prestress high intensity concrete square pile, it is characterized in that, it comprises, intracavity section is square, integral body is the die body (23) of cuboid, four limit corners of inner chamber square sectional are stress and eliminate circular arc, wherein a pair of arc chord angle (71) is 90 °, arc radius 25-30MM, another is 90 ° to arc chord angle (72), arc radius 5-10MM, be installed in the electromagnetic shaker (24) on die body bottom and the dual-side, die body two, its diameter is consistent with side's stake medium pore, a blow vent of closing (21) wherein, connect two blow vents, the inflation sebific duct (25) that internal diameter is identical with the medium pore of hollow concrete side's stake, the charging at two die body tops, exhaust opening (26), the reinforcing rib that is provided with on the die body (22).
12, the vibrating forming mould of making prestress high intensity concrete square pile according to claim 11 is characterized in that, described die body comprises, base plate (32), but vertically with base plate be provided with, from the side plate (31) of base plate dual-side folding.
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| CNB2007100685456A CN100436722C (en) | 2007-05-11 | 2007-05-11 | Prestress high intensity concrete square pile and its production method and moulding die |
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| JPH09158179A (en) * | 1995-12-08 | 1997-06-17 | Minoru Tomita | Method of many piles of compressed member of concrete steel pipe |
| JP2003027473A (en) * | 2001-07-17 | 2003-01-29 | Oak:Kk | Existing vibration isolation pile and formation method of cast-in-place vibration isolation pile |
| CN2659959Y (en) * | 2003-12-05 | 2004-12-01 | 贾燎 | Centrifugal concrete square pile and its moulding forms |
| CN2782762Y (en) * | 2005-01-31 | 2006-05-24 | 黄强 | Prestressed concrete hollow square section pile and tip of same |
| CN201045187Y (en) * | 2007-04-30 | 2008-04-09 | 上海中技桩业发展有限公司 | Prestressing force high-strength concrete square pile |
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| CN102267180A (en) * | 2011-06-10 | 2011-12-07 | 江苏建华管桩有限公司 | Concrete pile production method free from steaming and pressing and pouring remaining slurry |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101054800A (en) | 2007-10-17 |
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