CN102699996A - Prestressed pipe pile and production method thereof - Google Patents
Prestressed pipe pile and production method thereof Download PDFInfo
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- CN102699996A CN102699996A CN2012102204540A CN201210220454A CN102699996A CN 102699996 A CN102699996 A CN 102699996A CN 2012102204540 A CN2012102204540 A CN 2012102204540A CN 201210220454 A CN201210220454 A CN 201210220454A CN 102699996 A CN102699996 A CN 102699996A
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Abstract
The invention provides a prestressed pipe pile and a production method thereof. The production method of the prestressed pipe pile comprises the steps of loading in a cage, closing a mold, stretching cage bars, pumping concrete into the mold, centrifuging, performing normal-pressure steam curing, demolding and performing high-pressure steam curing, wherein the step of stretching the cage bars is implemented before the step of pumping the concrete into the mold. By adopting the process flows of firstly stretching the cage bars and then pumping the concrete into the mold, the cage bars can get prestress before the concrete is pumped into the mold, and the cage bars with prestress can support a pumping pipe to slide and move firstly on the inner circular surface of the cage bars, thus the stable pumping of cloth is realized.
Description
Technical field
The present invention relates to the concrete building material technical field, in particular to a kind of pile for prestressed pipe and production method thereof.
Background technology
Traditional pile for prestressed pipe technological process of production is: the artificial cloth → manual work of concrete slurry stirring → bed die open type smear slurry → pipe die tongue and groove press straw rope → close cover mold → artificial hook pipe die limit screw → manual work portable beat stretch-draw in wind big gun lock seaming screw → screw mandrel formula → the hang heart → steam-cured → go out pond → head end put open → tear open limit silk → take off cover mold → tear open end to end plate → turn over mould fall → hang to go into the cover mold of still steam press maintenance → clearly, bed die → dress cage muscle → adorn plate, the preceding cloth of baffle plate → cape end to end.There is following problem in traditional method of operating:
(1) matched moulds behind the first cloth has a small amount of aggregate to be scattering into pipe die tongue and groove edge during matched moulds, cause matched moulds not tight, is prone to cause centrifugal spillage, pile tube moulding ellipse.
(2) waste material that artificial cloth speed is low, labour intensity big, be scattered in pipe die tongue and groove limit is many, and waste is big.
(3) two ends hook lifting is adopted in the pile tube demoulding, is prone to cause the pile body ring crack.
(3) adopt the interior stretch-draw of screw mandrel to be prone to cause the pile tube end slope.
(4) loop wheel machine is at the intensive area operation of operating personnel, and potential safety hazard is big.
Application number the applicant is in the patent application document of 201110156171.X, has put down in writing first dress cage, matched moulds, and pump concrete is gone into mould again, and stretch-draw cage muscle then is centrifugal subsequently, normal pressure is steam-cured, the demoulding and the steam-cured technological process of secondary high-pressure.Yet find that in actual production such technological process exists very big defective: pumping line inserts to be actually from the cage muscle behind the uropore of pipe die and slips over, owing to there is not stretch-draw, the cage muscle does not have tension force, is easy to cause the cage that looses.
Summary of the invention
The present invention aims to provide a kind of pile for prestressed pipe and production method thereof, causes the technical problem of diffusing cage behind the uropore with concrete pumping pipe insertion pipe die in the technological process that overcomes prior art at least easily.
To achieve these goals; According to an aspect of the present invention; A kind of pile for prestressed pipe production method is provided; Comprise dress cage, matched moulds, stretch-draw cage muscle, pump concrete go into mould, centrifugal, normal pressure is steam-cured, the demoulding and high-pressure steaming and cultivating step, wherein, the step of stretch-draw cage muscle was implemented before pump concrete is gone into the mould step.
Further, adopt the pile tube automatic production line to implement the pile for prestressed pipe production method, realize the pile for prestressed pipe production method of automation.
Further, the pile for prestressed pipe production method of automation comprises: S1 is assembled to end plate and cage muscle in the bed die; S2 is delivered to the top of bed die, cover mold and bed die matched moulds with cover mold; S3 carries out stretch-draw to the cage muscle in the mould behind the matched moulds; S4 is delivered to the cloth station with mould, and concrete pump is sent into mould; S5 will carry concrete mould and be delivered to centrifugal station, carry out centrifugal; S6 is delivered to the steam-cured station of normal pressure with the mould after centrifugal, and it is steam-cured to carry out normal pressure; S7 is delivered to demoulding station with the mould after steam-cured, carries out the demoulding; And S8, the pile tube after the demoulding is carried out high-pressure steaming and cultivating.
Further, between step S1 and step S2, further comprise the step that bed die is delivered to the matched moulds station.
Further, stretch-draw cage muscle step adopts the outer stretching mode of stretch-draw ring type, may further comprise the steps: the end that the stretch-draw machine is placed into mould; And the end of stretch-draw machine and mould fastening, start hydraulic pressure jack pair cage muscle and carry out stretch-draw.
Further, pump concrete is gone into the mould step and is comprised: concrete pump is sent into mould; And weighing system and transmission system are according to pumping into the concrete weight in the mould, the rate of displacement of control concrete pumping amount and mould.
Further, step S7 comprises: the mould after steam-cured is delivered to takes off the cover mold station, adopt fixed single armed loop wheel machine to grasp cover mold automatically; And the mould that will throw off cover mold is delivered to and hangs a station, adopts sucked type to hang a device and hangs stake.
Further, between step S7 and step S8, further comprise the step of clearing up mould.
According to another aspect of the present invention, a kind of pile for prestressed pipe is provided, has adopted above-mentioned pile for prestressed pipe production method to prepare.
According to technical scheme of the present invention; The pile for prestressed pipe production method comprises: dress cage, matched moulds, stretch-draw cage muscle, pump concrete go into mould, centrifugal, normal pressure is steam-cured, the demoulding and the steam-cured step of secondary high-pressure; Wherein, the step of stretch-draw cage muscle was implemented before pump concrete is gone into the mould step.Through adopting pretensioning cage muscle, concrete pump being sent into the technological process of mould again; Can be so that the cage muscle just obtains prestressing force before concrete pump is sent into mould; Have prestressed cage muscle and can support pumping line and on the inner headed face of cage muscle, slide and get ahead, realize stable pumping cloth.
Description of drawings
The Figure of description that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the pile for prestressed pipe production method process chart according to the specific embodiment of the present invention.
The specific embodiment
A kind of typical embodiment according to the present invention, the pile for prestressed pipe production method comprises: dress cage, matched moulds, stretch-draw cage muscle, pump concrete go into mould, centrifugal, normal pressure is steam-cured, the demoulding and high-pressure steaming and cultivating step.Wherein, the step of stretch-draw cage muscle was implemented before pump concrete is gone into the mould step.Through adopting pretensioning cage muscle, concrete pump being sent into the technological process of mould again; Can be so that the cage muscle just obtains prestressing force before concrete pump is sent into mould; Have prestressed cage muscle and can support pumping line and on the inner headed face of cage muscle, slide and get ahead, realize stable pumping cloth.
Among the existing preparation method, adopt the first cloth production technology of stretch-draw more usually.The present inventor finds that in production practices existing manufacturing technique is easy to take place the cage phenomenon of loosing, thereby the pile for prestressed pipe credit rating that causes processing reduces, even the pile for prestressed pipe that can cause processing becomes waste product.Therefore the application's applicant has proposed the technical scheme of cloth behind the pretensioning in order to address this problem.After the cage muscle carried out stretch-draw earlier and make that the cage muscle has certain prestressing force, can make pumping line on the inner headed face of cage muscle, slide, avoid the slip of pumping line to cause the problem of cage of loosing, thereby reached the effect of stable pumping cloth.
The present invention a kind of preferred embodiment in; Adopt the pile tube automatic production line (patent No. 201110237097.4 of design voluntarily; All the elements of this patent are quoted so far for your guidance) implement the pile for prestressed pipe production method, thus realize the pile for prestressed pipe production method of automation.Particularly, this pile tube automatic production line comprises: be used to make the cage muscle, and the cage muscle that a plate, tailgate, cage muscle are assembled into is together made the district; Be arranged on the cage muscle and make on district's one side, be used for the cage muscle of making is assembled to the dress cage district on the bed die, the cage muscle is made between district and the dress cage district and is provided with the pipe die conveyor group; Be arranged on dress cage district one side cover mold district that cover mold was cleared up and carried to the cover mold of taking off behind the cover mold; Be arranged on dress cage district and cage muscle make distinguish between, the mould behind the cover mold is carried out the mould closing section of matched moulds, be provided with the pipe die conveyor group between cover mold district and the mould closing section; Being arranged on the cage muscle makes on district's opposite side, to cloth district before the platform of the mould cloth behind the matched moulds; Be arranged on the centrifugal forming district on the preceding cloth district of platform one side; Be arranged on the steam-cured district on centrifugal forming district one side; Be arranged on the form removal district on steam-cured district one side, described form removal district is arranged on described cover mold district one side; Be arranged on the steaming nip on the form removal district opposite side.Because the specific embodiment of this automatic production line has been introduced in application documents formerly in detail, here the applicant just repeats no more.The application has further realized the automation that pile tube is produced through using the pile tube automatic production line on the technical scheme basis that proposes cloth behind the pretensioning, reduced working strength of workers, has reduced potential safety hazard, has improved production efficiency and product quality.
Preferably, in the specific embodiment provided by the invention, automation pile for prestressed pipe production method comprises: S1 is assembled to end plate and cage muscle in the bed die; S2 is delivered to the top of bed die, cover mold and bed die matched moulds with cover mold; S3 carries out stretch-draw to the cage muscle in the mould behind the matched moulds; S4 is delivered to cloth station (being the preceding cloth district of platform of pile tube automatic production line) with mould, and concrete pump is sent into mould; S5 will carry concrete mould and be delivered to centrifugal station (being the centrifugal forming district of pile tube automatic production line), carry out centrifugal; S6 is delivered to the steam-cured station of normal pressure (being the steam-cured district of pile tube automatic production line) with the mould after centrifugal, and it is steam-cured to carry out normal pressure; S7 is delivered to demoulding station (being the form removal district of pile tube automatic production line) with the mould after steam-cured, carries out the demoulding; And S8, the pile tube after the demoulding is carried out high-pressure steaming and cultivating.Wherein, the pile quality problem that the upper and lower mould joint close that cloth behind the first matched moulds, enclosed cloth have been avoided causing because of matched moulds behind the first cloth does not sternly cause, thus make that the tubular pile centrifugal time is short, the inwall moulding is smooth, intensity is high; Cloth behind the pretensioning makes the cage muscle send at concrete pump and just obtains prestressing force before the mould, has prestressed cage muscle and can support pumping line and on the inner headed face of cage muscle, slide and get ahead, and realizes stable pumping cloth.
Preferably, between step S1 and step S2, further comprise the step that bed die is delivered to matched moulds station (being the mould closing section of pile tube automatic production line).The matched moulds step is after the cage muscle is gone into bed die, cover mold and bed die matched moulds also to be played the lock seaming screw, owing to be sky mould matched moulds, play the lock seaming screw and is well on, and required torsion is little, and the wind big gun specification of use is little, has reduced production cost.Further preferably, in addition, in concrete embodiment, all be coated with releasing agent in bed die and the cover mold in advance, like this can be so that demoulding step subsequently is more prone to carry out.
Preferably, stretch-draw cage muscle step adopts the outer stretching mode of stretch-draw ring type, may further comprise the steps: the end that the stretch-draw machine is placed into mould; And the end of stretch-draw machine and mould fastening, start hydraulic pressure jack pair cage muscle and carry out stretch-draw.The tentioning stroke of this mode is short, and required jack stroke is short, and jack is little, in light weight.Particularly; The stretch-draw machine that the present invention adopted can be the conventional stretch-draw machine in this area; Preferably, the stretch-draw sub-assembly (patent No. 201110215313.5, all the elements of this patent are quoted so far for your guidance) that adopts the applicant to develop voluntarily; The beneficial effect that uses this stretch-draw sub-assembly be jack and stretch-draw sub-assembly take off dress fast, high efficiency, stopped the pile tube end slope problem that traditional stretch-draw causes.The concrete structure of this stretch-draw sub-assembly and embodiment are described in detail in application documents formerly, and the applicant repeats no more.
Preferably, pump concrete is gone into the mould step and is comprised: concrete pump is sent into mould; And weighing system and transmission system are according to pumping into the concrete weight in the mould, the rate of displacement of control concrete pumping amount and mould.Particularly; The present invention can adopt conventional automatic metering equipment, preferably, adopts the automatic metering equipment (patent No. 201120135514.X of development voluntarily; All the elements of this patent are quoted so far for your guidance), to realize that concrete material is by correct distributing technique uniform distribution.The concrete structure of this automatic metering equipment and embodiment are described in detail in application documents formerly, and the applicant repeats no more.
Preferably, step S7 (being demoulding step) comprising: the mould after steam-cured is delivered to demoulding station (being the form removal district of pile tube automatic production line), adopts fixed single armed loop wheel machine to grasp cover mold automatically; And the mould that will throw off cover mold is delivered to and hangs a station (district is adjacent with form removal), adopts sucked type to hang a device and hangs stake.Preferably; The present invention can use the sucked type of development voluntarily to hang a device (patent No. 201120041001.2; All the elements of this patent are quoted so far for your guidance), pile tube is carried out the lifting of multiple spot absorption type, solved the pile body ring crack problem that pile tube causes because of the hook lifting effectively.This sucked type hangs the concrete structure and the embodiment of a device and in application documents formerly, describes in detail, and the applicant repeats no more.
Preferably, between step S7 and step S8, further comprise the step of clearing up mould.Before bed die and the circulation of cover mold entering next round processing step; Concrete material and other waste materials remaining in bed die and the cover mold are cleaned out; Can increase the life-span that recycles of mould, and improve the product quality of the pile for prestressed pipe that the circulation of next round processing step produced.
A kind of typical embodiment according to the present invention provides a kind of pile for prestressed pipe, and this pile for prestressed pipe adopts above-mentioned pile for prestressed pipe production method to prepare.
Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the present invention.
Embodiment 1
Need to prove that the equipment that adopts among the application embodiment 1 is pile tube automatic production line (patent No. 201110237097.4, all the elements of this patent are quoted so far for your guidance)
As shown in Figure 1, the technological process of the pile for prestressed pipe production method of embodiment 1 specifically may further comprise the steps:
The preparation of mould: Φ 500*100*12 mitron pile die is hung on first group of horizontal chain transfer; Through jacking translation conveyer pipe die is transported to first group of vertical chain conveyer then, when pipe die is vertically carried, stands in both sides and remove pipe die limit screw by the workman.Pipe die has been torn the limit screw open and has been continued to move to and take off the cover mold station; Special use is taken off cover mold equipment and is grasped automatically to carry on the pipe die running wheel cover mold is opened; Move to the appointment station then aloft; Transfer pipe die again to second group of horizontal chain transfer and continue transported to next station, in this course of conveying, accomplish release agent spraying.A kind of dolly of dedicated transport cover mold carries automatic handgrip extracting pipe die running wheel pipe die is transported to matched moulds station wait matched moulds.Bed die continues to be fed forward to the appointment station after opening cover mold on first group of vertical chain conveyer; Through second group of jacking translation bed die is transported to the 3rd group of horizontal chain transfer; Cleaning bed die, automatic release agent spraying and dress cage muscle operation are set on the 3rd group of horizontal chain transfer, and bed die was transported to matched moulds station and cover mold completion matched moulds after bed die, automatic release agent spraying and dress cage muscle operation were put in completion in order.Matched moulds is accomplished in the vertical course of conveying of pipe die and is played the lock seaming screw after the 3rd group of jacking translation is transported to second group of vertical chain conveyer.Pipe die has been played the lock seaming screw after the 4th group of jacking translation is transported to the 4th group of horizontal chain transfer; Stretch-draw outside the stretch-draw ring type of main muscle is accomplished in the appropriate location of the 4th group of horizontal chain transfer, the stretch-draw parts that adopted are waited for cloth before again pipe die being transported to platform.
In this enforcement, the stretch-draw sub-assembly (patent No. 201110215313.5, all the elements of this patent are quoted so far for your guidance) that adopts the applicant to develop voluntarily carries out stretch-draw to the cage muscle.The stretch-draw machine is placed into the end of mould, and the handwheel that promotes the stretch-draw machine makes the end of stretch-draw machine and mould fasten, and starter motor carries out stretch-draw to the cage muscle, and the Pressure gauge of machine to be tensioned shows when reaching setting can stop stretch-draw.
The preparation of concrete material: with unit weight 2500Kg/m
3Cement 480Kg, levigate sand 240Kg, water 250Kg, water reducer 12Kg, sand 1260Kg, rubble 1550Kg accomplish agitating procedure through mixer, make concrete material, put into hopper.
Pumping cloth: use fixed single armed loop wheel machine will accomplish pipe die handling after the main muscle stretch-draw to the automatic gauge flatcar; Through electrical control the automatic gauge flatcar is advanced forward, make the concrete material carrier pipe insert pipe die until near till the pipe die head end from the pipe die uropore.The control valve of crawl hopper; Make concrete material fall into concrete pump machine hopper; Start the pump machine, concrete material at first is inhaled into pump machine concrete cylinder from pump machine hopper, then under the control of cylinder pressure; Concrete material gets into the concrete material carrier pipe, and completion is to the accurate cloth of pipe die under the mutual cooperation of the speed of travel of automatic gauge flatcar and concrete material rate of pumping.
In the process of entire pump work feed material; Owing to carried out the step of stretch-draw cage muscle in the production technology earlier; So the cage muscle can support pumping line and on the inner headed face of cage muscle, slide and get ahead, the process of pumping cloth is not found the loose phenomenon of cage of cage muscle, and the cloth process is very steady.
Centrifugal: after pumping cloth material process is accomplished, concrete with pipe die through fixed single armed loop wheel machine hung onto centrifuge begin centrifugal, low-speed stage: 80 rev/mins of pipe die rotating speeds, 1.5 minutes time; The low-medium speed stage: 160 rev/mins of pipe die rotating speeds, 1.5 minutes time; The middling speed stage: 300 rev/mins of pipe die rotating speeds, 2 minutes time; The high speed stage: 370 rev/mins of pipe die rotating speeds, 1.5 minutes time; High speed stage: 420 rev/mins of pipe die rotating speeds, 3.5 minutes time.
Atmospheric steam curing: temperature rise period: evenly be warming up to 58+2 ℃ in 30 minutes; Evenly be warming up to 75 ± 2 ℃ in 1 hour; 1.5 hour evenly be warming up to 85～90 ℃; The constant temperature stage: 4.0 hours (remaining on 85～90 ℃); Temperature-fall period: the cooling of uncapping.
Go out Chi Xiezhuan (demoulding): after atmospheric steam curing finishes; Pile tube is hung onto on first group of horizontal chain transfer; The Zhang Gong position of putting setting is torn tailgate open and is put and open; Tailgate flows into cage muscle assembly station and gets into circulation next time, and pile tube arrives and takes off the cover mold station via first group of jacking translation, first group of vertical chain conveyer, and cover mold is opened to be put into gets into next circulation on second group of horizontal chain transfer; Bed die continues to advance to pile tube and hangs a station; Sucked type hangs a device (sucked type that the patent No. 201120041001.2 provides hangs a device, and all the elements of this patent are quoted so far for your guidance) lifting pile tube and is placed into and tears a plate station open, and bed die gets into circulation next time through second group of jacking translation.Tearing a plate station dismounting plate open, make a plate enter into circulation next time.Sucked type hang a device once more the lifting pile tube be put on the car with the stake car and get into the autoclave curing operation.
Autoclave curing: boost phase: 1.5 hours, rise to 1.00MPa by normal pressure; Constant-voltage phase: 4.0 hours, constant voltage pressure kept 1.00+0.05MPa; Buck stage: 2.5 hours, pressure was reduced to normal pressure by 1.00MPa; Temperature-fall period: aeration-cooling back anchor goes out still.
So far, a Φ 500*100*12 rice pile for prestressed pipe finished product production is accomplished.
Visible by the foregoing description, pile for prestressed pipe production method provided by the invention has following beneficial technical effects:
(1) simplified process;
(2) stretch-draw cage muscle is before concrete pump is sent into mould, has prestressed cage muscle and can support pumping line and on the inner headed face of cage muscle, slide and get ahead, and avoided the slip of pumping line to cause the problem of cage of loosing, thereby realized stable pumping cloth.
(3) the pile quality problem that the upper and lower mould joint close that cloth behind the first matched moulds, enclosed cloth have been avoided causing because of matched moulds behind the first cloth does not sternly cause, thus make that the tubular pile centrifugal time is short, the inwall moulding is smooth, intensity is high.
(4) adopt the outer stretch-draw of stretch-draw ring type, solved pile tube end slope problem;
(5) adopt sucked type to hang a device, solved pile tube ring crack problem;
(6) big, the shortcomings such as waste of raw materials big, use straw rope of labour intensity that manual cloth causes have been eliminated;
(7) supporting with it apparatus arrangement automation technolo degree is high, safety coefficient is high, labour intensity is little, recruitment quantity is few.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. pile for prestressed pipe production method; Comprise dress cage, matched moulds, stretch-draw cage muscle, pump concrete go into mould, centrifugal, normal pressure is steam-cured, the demoulding and high-pressure steaming and cultivating step; It is characterized in that the step of said stretch-draw cage muscle was implemented before said pump concrete is gone into the mould step.
2. pile for prestressed pipe production method according to claim 1 is characterized in that, adopts the pile tube automatic production line to implement said pile for prestressed pipe production method, realizes the pile for prestressed pipe production method of automation.
3. pile for prestressed pipe production method according to claim 2 is characterized in that, the pile for prestressed pipe production method of said automation comprises:
S1 is assembled to end plate and cage muscle in the bed die;
S2 is delivered to the top of said bed die, said cover mold and said bed die matched moulds with cover mold;
S3 carries out stretch-draw to the said cage muscle in the mould behind the matched moulds;
S4 is delivered to the cloth station with mould, and concrete pump is sent into mould;
S5 will carry concrete mould and be delivered to centrifugal station, carry out centrifugal;
S6 is delivered to the steam-cured station of normal pressure with the mould after centrifugal, and it is steam-cured to carry out normal pressure;
S7 is delivered to demoulding station with the mould after steam-cured, carries out the demoulding; And
S8 carries out high-pressure steaming and cultivating with the pile tube after the demoulding.
4. pile for prestressed pipe production method according to claim 3 is characterized in that, between said step S1 and said step S2, further comprises the step that said bed die is delivered to the matched moulds station.
5. according to each described pile for prestressed pipe production method in the claim 1 to 4, it is characterized in that said stretch-draw cage muscle step adopts the outer stretching mode of stretch-draw ring type, may further comprise the steps:
The stretch-draw machine is placed into the end of said mould; And
The end of said stretch-draw machine and said mould fastens, and starts the said cage muscle of hydraulic pressure jack pair and carries out stretch-draw.
6. according to each described pile for prestressed pipe production method in the claim 1 to 4, it is characterized in that said pump concrete is gone into the mould step and comprised:
Concrete pump is sent into said mould; And
Weighing system and transmission system are according to pumping into the concrete weight in the said mould, the rate of displacement of control concrete pumping amount and said mould.
7. pile for prestressed pipe production method according to claim 3 is characterized in that, said step S7 comprises:
Said mould after steam-cured is delivered to takes off the cover mold station, adopt fixed single armed loop wheel machine to grasp said cover mold automatically; And
The mould of throwing off said cover mold is delivered to hangs a station, adopt sucked type to hang a device and hang stake.
8. pile for prestressed pipe production method according to claim 3 is characterized in that, between said step S7 and said step S8, further comprises the step of clearing up mould.
9. a pile for prestressed pipe is characterized in that, each described pile for prestressed pipe production method prepares in the employing claim 1 to 8.
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| CN2012102204540A CN102699996A (en) | 2012-06-29 | 2012-06-29 | Prestressed pipe pile and production method thereof |
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| CN2012102204540A CN102699996A (en) | 2012-06-29 | 2012-06-29 | Prestressed pipe pile and production method thereof |
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| CN103223694A (en) * | 2013-03-29 | 2013-07-31 | 南通中技桩业有限公司 | Technology for producing novel prestressing hollow square pile |
| CN103448140A (en) * | 2013-08-21 | 2013-12-18 | 大连大金马基础建设有限公司 | Full prestressing solid square pile long-line stand production line |
| CN103660027A (en) * | 2013-12-30 | 2014-03-26 | 中铁二十三局集团轨道交通工程有限公司 | Automatic production process of concrete precast products |
| CN104563102A (en) * | 2014-10-13 | 2015-04-29 | 叶长青 | Screw pile, manufacture method thereof, and construction method of screw pile |
| CN104589489A (en) * | 2014-12-26 | 2015-05-06 | 湖南恒瑞管桩科技有限公司 | Tubular pile prestress tensioning machine |
| CN104674790A (en) * | 2015-03-09 | 2015-06-03 | 江苏建华管桩有限公司 | Concrete wood simulating pile and manufacturing method thereof |
| CN109910167A (en) * | 2018-02-12 | 2019-06-21 | 周兆弟 | A kind of production technology of prefabricated pile |
| CN111001738A (en) * | 2019-12-10 | 2020-04-14 | 许翠玲 | Cement product manufacturing and processing method |
| CN113070997A (en) * | 2021-04-27 | 2021-07-06 | 北京中岩大地科技股份有限公司 | Method for vertically manufacturing tubular pile |
| CN114434628A (en) * | 2022-02-24 | 2022-05-06 | 肇庆高宏管桩建材有限公司 | Production method of tubular pile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103223694A (en) * | 2013-03-29 | 2013-07-31 | 南通中技桩业有限公司 | Technology for producing novel prestressing hollow square pile |
| CN103448140A (en) * | 2013-08-21 | 2013-12-18 | 大连大金马基础建设有限公司 | Full prestressing solid square pile long-line stand production line |
| CN103448140B (en) * | 2013-08-21 | 2016-04-13 | 大连大金马基础建设有限公司 | Full prestressing solid square pile long line platform production line |
| CN103660027B (en) * | 2013-12-30 | 2016-02-17 | 中铁二十三局集团轨道交通工程有限公司 | A kind of concrete prefabricated product automation production technology |
| CN103660027A (en) * | 2013-12-30 | 2014-03-26 | 中铁二十三局集团轨道交通工程有限公司 | Automatic production process of concrete precast products |
| CN104563102A (en) * | 2014-10-13 | 2015-04-29 | 叶长青 | Screw pile, manufacture method thereof, and construction method of screw pile |
| CN104589489A (en) * | 2014-12-26 | 2015-05-06 | 湖南恒瑞管桩科技有限公司 | Tubular pile prestress tensioning machine |
| CN104674790A (en) * | 2015-03-09 | 2015-06-03 | 江苏建华管桩有限公司 | Concrete wood simulating pile and manufacturing method thereof |
| CN109910167A (en) * | 2018-02-12 | 2019-06-21 | 周兆弟 | A kind of production technology of prefabricated pile |
| CN110154221A (en) * | 2018-02-12 | 2019-08-23 | 周兆弟 | Concrete precast pile two is across line production system |
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Application publication date: 20121003 |