CN113232140B - Method for producing solid square pile by using hollow square pile die - Google Patents

Abstract

The invention provides a method for producing a solid square pile by using a hollow square pile die. The method comprises the following steps: pumping the stirred concrete into the square pile die through a material distribution opening of the square pile die for distributing, and lifting one end of the square pile die close to the material overflow opening; after the material distribution is finished, the square pile die is laid flat, the material distribution opening is closed by a first temporary material blocking door, and then one end of the square pile die, which is close to the material overflow opening, is lifted; when the concrete is initially set, the square pile mould is laid flat, and the overflow port is sealed by a second temporary plugging door; and (4) putting the square pile die into a steam curing pool for steam curing.

Description

Method for producing solid square pile by using hollow square pile die

Technical Field

The invention belongs to the technical field of square pile production, and relates to a method for producing a solid square pile by using a hollow square pile die.

Background

Because the prestressed solid square pile has certain superiority in the aspects of earthquake resistance, shearing resistance, durability and the like relative to the prestressed pipe pile and the prestressed hollow square pile, the popularization and application proportion is continuously increased in recent years. The prestressed solid square pile adopts a prestressed tensioning and concrete non-centrifugal forming process, which is different from the prestressed hollow square pile adopting a prestressed tensioning and concrete centrifugal forming process, so that the two moulds adopted in the preparation processes are different. With the increase of the application proportion of the prestressed solid square pile, the prestressed hollow square pile die of each prestressed pile manufacturer is continuously idle, if the existing production process of each manufacturer is adopted for the idle prestressed hollow square pile die, the idle prestressed hollow square pile die cannot be used for producing the prestressed solid square pile, the waste of the prestressed hollow square pile die is caused, the die needs to be manufactured or purchased again for preparing the prestressed solid square pile, and the investment cost per meter for manufacturing the prestressed solid square pile die is more than twice that of the hollow square pile die. Therefore, no matter the solid square pile die is made or purchased, a huge cost expenditure is caused, and a great pressure is caused to manufacturers.

Disclosure of Invention

Aiming at the defects of the prior art, the invention improves the hollow square pile die and is matched with a special process, thereby enabling the production of the solid square pile by using the hollow square pile die to be possible, reducing the one-time investment of the die and simultaneously improving the labor productivity and the product quality.

The invention aims to provide a method for producing a solid square pile by using a hollow square pile die, which is characterized by comprising the following steps of:

pumping and pressing the stirred concrete into the square pile die through a material distribution opening of the square pile die for material distribution, and lifting one end of the square pile die close to the material overflow opening during material distribution;

after the material distribution is finished, the square pile mould is laid flat, the material distribution opening is closed by a first temporary material blocking door, and then one end of the square pile mould close to the material overflow opening is lifted;

when the concrete is initially set, the square pile mould is laid flat, and the overflow port is sealed by a second temporary plugging door;

and (4) putting the square pile mould into a steam curing pool for steam curing.

The concrete is preferably self-compacting concrete.

Preferably, a pump pipe joint is detachably arranged at a material distribution port of the square pile die, and the pump pipe joint is connected with a pump to send the stirred concrete into the square pile die.

Preferably, a funnel is detachably arranged at the flash opening of the square pile die, concrete is filled in the funnel from the material distribution to the flash opening of the square pile die, and the material distribution is finished.

Preferably, one end of the square pile mould close to the overflow port is raised, so that the vertical distance between the raised end of the square pile mould and the non-raised end is 0.5-2 m.

Preferably, the square pile die is formed by modifying a hollow square pile die.

Preferably, the square pile mold comprises:

an upper die and a lower die;

the material distribution port is arranged on the upper die of the square pile die;

and the overflow port is arranged on the upper die of the square pile die.

Preferably, the upper die and the lower die are buckled to form an inner cavity for casting concrete, and the material distribution port and the flash port are communicated with the inner cavity.

Preferably, the flash port is arranged at one end of the square pile die, and the cloth port is arranged between the other end of the square pile die and the middle section of the square pile die.

Preferably, the square pile mold further comprises:

the first temporary material blocking door is detachably connected with the square pile die and used for closing the material distribution port;

and the second temporary material blocking door is detachably connected with the square pile die and used for sealing the overflow port.

Preferably, the square pile mold further comprises: and the pump pipe joint is detachably arranged at the material distribution port of the square pile die and is connected with the pump through the pump pipe joint to send the stirred concrete into the square pile die.

Preferably, the square pile mold further comprises: the funnel, its detachably sets up the flash mouth department at square pile mould, and during the cloth, the concrete is by the cloth mouth and go up to the flash mouth and get into the funnel, has the concrete in the funnel, then the cloth is ended.

Preferably, the solid square pile is a prestressed solid square pile and a partially prestressed solid square pile.

Compared with the prior art, the invention has the following beneficial effects:

1. the original hollow square pile die is simply transformed, namely the hollow square pile die is provided with the material distribution port and the material overflow port, so that the purpose of producing the solid square pile can be achieved, large-scale structural improvement is not needed, the solid square pile die does not need to be purchased or manufactured by self, and a large amount of cost is saved;

2. the improved hollow square pile die also comprises a pump pipe joint, a funnel, a first temporary blocking door and a second temporary blocking door, and the production of the solid square pile can be realized by matching various components with a special preparation process;

3. the invention adopts a special preparation process to produce the solid square pile, does not need surface folding treatment, and can simultaneously improve the product quality and the production efficiency of the solid square pile.

Drawings

FIG. 1 is a schematic structural diagram of a conventional hollow square pile mold;

FIG. 2 isbase:Sub>A cross-sectional view taken at A-A of FIG. 1;

FIG. 3 is a schematic structural view of a modified hollow square pile mold according to the present invention;

FIG. 4 isbase:Sub>A cross-sectional view taken at A-A of FIG. 3 in accordance with the present invention;

FIG. 5 is a cross-sectional view taken at B-B of FIG. 3 in accordance with the present invention;

FIG. 6 is a cross-sectional view taken at C-C of FIG. 3 in accordance with the present invention;

FIG. 7 is a schematic view of the square pile mold of the present invention in an inclined state;

FIG. 8 is a schematic structural view of a first temporary plugging door according to the present invention;

FIG. 9 is a schematic structural view of a second temporary plugging door according to the present invention;

FIG. 10 is a flow chart of a production process of a fully prestressed solid square pile according to embodiment 1 of the present invention;

fig. 11 is a flow chart of a production process of a partially prestressed solid square pile according to embodiment 2 of the present invention.

In the figure, 11, the upper die; 12. a lower die; 10. an inner cavity;

100. a square pile mould; 101. an inner cavity; 110. an upper die; 120. a lower die; 130. a material distribution port; 131. a pump line connector; 132. a first temporary plugging gate; 140. an overflow port; 141. a funnel; 142. a second temporary plugging gate.

Detailed Description

The technical solutions of the present invention will be further described and illustrated by the following specific embodiments and accompanying drawings, but the present invention is not limited thereto. The raw materials used in the examples of the present invention are all those commonly used in the art, and the methods used in the examples are all those conventionally used in the art, unless otherwise specified.

The existing hollow square pile mould is shown in fig. 1-2 and comprises an upper mould 11 and a lower mould 12, wherein the upper mould 11 and the lower mould 12 are buckled to form an inner cavity 10 for casting concrete, and the cross section of the inner cavity 10 is of a square structure.

The invention sets up cloth mouth and flash mouth on the existing hollow square pile mould, form the hollow square pile mould after transforming, the hollow square pile mould after transforming is as shown in figure 3-6, including:

the mould comprises an upper mould 110 and a lower mould 120, wherein the upper mould 110 and the lower mould 120 are buckled to form an inner cavity 101 for casting concrete, and the cross section of the inner cavity 101 is of a square structure;

the material distribution port 130 is arranged on the upper die 110 of the square pile die 100, the material distribution port 130 is communicated with the inner cavity 101, and the material distribution port is detachably connected with a pump pipe joint 131;

and a flash port 140 disposed on the upper mold 110 of the square pile mold 100, the flash port 140 being in communication with the inner cavity 101, and the flash port 141 being detachably connected with a funnel 141.

The material overflow port 140 is disposed at one end of the square pile mold, and the material distribution port 141 is disposed between the other end and the middle section of the square pile mold.

Preferably, a first temporary blocking door 132 is further included, which is detachably connected to the square pile mold 100 and is used to close the material distribution opening 130.

Preferably, a second temporary plugging door 142 is further included, which is detachably coupled to the square pile mold 100 and is used to close the flash port 140.

The invention adopts the transformed hollow square pile mould as the square pile mould for producing the solid square pile, and comprises the following steps:

pumping the stirred concrete into the square pile mold 110 through the material distribution opening 130 of the square pile mold 100 for material distribution, and lifting one end of the square pile mold 100 close to the material overflow opening 140 during material distribution;

after the material distribution is finished, the square pile die 100 is laid flat, the material distribution port 130 is sealed by the first temporary material blocking door 132, and then one end of the square pile die 100, which is close to the material overflow port 140, is lifted;

when the concrete is initially set, the square pile mould 100 is laid flat, and the overflow port 140 is sealed by a second temporary plugging door 142;

and (3) putting the square pile mould 100 into a steam curing pool for steam curing.

According to the invention, the pump pipe joint 131 is preferably detachably arranged at the material distribution opening 130 of the square pile mold 100, the pump pipe joint 131 is externally connected with the feeding pump, and concrete is fed into the pump pipe joint 131 through the feeding pump and then is fed into the inner cavity 101 of the square pile mold 110 through the material distribution opening 130.

The present invention preferably detachably provides a funnel 141 at the flash port 140 of the square pile mold 100.

During material distribution, one end of the square pile mold 100, which is close to the overflow port 140, is raised, so that the whole square pile mold 100 is in an inclined state, as shown in fig. 7, and the vertical distance between the raised end and the non-raised end of the square pile mold 100 is preferably 0.5-2 m. During material distribution, the concrete is fed from the material distribution port 130 to the overflow port 140 and enters the hopper 141, and the material distribution is completed after a proper amount of concrete is filled in the hopper 141.

After the material distribution is finished, the square pile mould 100 is laid flat, the pump pipe joint 131 is removed, the first temporary material blocking door 132 is replaced to seal the material distribution port 130, then one end of the square pile mould 100 close to the material overflow port 140 is lifted, as shown in fig. 7, the vertical distance between the lifted end of the square pile mould 100 and the non-lifted end is preferably 0.5-2 m, and it is ensured that a proper amount of redundant concrete is in a static stop state in the funnel 141 of the material overflow port 140. When the concrete is to be initially set, the square pile mold 100 is laid flat, the funnel 141 is removed, the concrete at the overflow port 140 is leveled, and the second temporary blocking door 142 is installed to seal the overflow port 140.

The first temporary blocking gate 132 and the second temporary blocking gate 142 are preferably of W-shaped configuration as shown in fig. 8 to 9, and the distribution port 130 and the overflow port 140 are completely sealed when the first temporary blocking gate 132 and the second temporary blocking gate 142 replace the pump pipe joint 131 and the funnel 141, respectively.

And (3) hoisting the square pile mould 100 provided with the second temporary blocking door 142 into a normal-pressure steam curing pool for normal-pressure curing, wherein the first temporary blocking door and the second temporary blocking door are upward, removing the tensioning device after curing and forming, removing the curing and forming solid square pile, inspecting the solid square pile, and warehousing the qualified solid square pile.

Example 1

The square pile mould of this embodiment is the hollow square pile mould after reforming transform, includes:

an upper die and a lower die;

the material distribution port is arranged on the upper die of the square pile die and communicated with the inner cavity;

and the overflow port is arranged on the upper die of the square pile die and communicated with the inner cavity.

The modified hollow square pile die is adopted to produce the prestressed solid square pile, the production process flow chart is shown in figure 10, and the concrete steps are as follows:

firstly, respectively conveying bulk cement and an admixture to an electronic scale through a spiral pipe, metering, and putting the weighed bulk cement and the admixture into a stirrer; the qualified sand is conveyed into a stirrer through a belt conveyor after being measured by a sand electronic scale, the qualified broken stone is conveyed into the stirrer through the belt conveyor after being measured by a broken stone electronic scale, water and a water reducing agent are directly pumped to an electronic scale, and the water reducing agent are put into the stirrer after being measured, and all the components are stirred uniformly.

And secondly, cleaning the square pile die, and coating a release agent in the inner cavity of the die.

Thirdly, the longitudinal PC steel bar is subjected to fixed-length fine cutting through a fine cutting machine, and then pier head treatment is carried out to be used as a main rib; cold-drawing the stirrups, coiling the stirrups on a binding machine, and welding the stirrups on the main reinforcements in a spiral shape by using a seam welder to form a reinforcement cage; the end plate and the apron plate are welded to form a pile head, and the pile head and the reinforcement cage are assembled together to form the reinforcement cage with the pile head.

And fourthly, placing the reinforcement cage with the pile head into a lower die of the square pile die, closing the upper die and the lower die of the square pile die, moving the jack, adjusting the jack up and down to enable the tensioning rod to be aligned with the center of the square pile die, and performing longitudinal tensioning after the tensioning rod is aligned with the tensioning head and fastened to form a horizontal line.

Fifthly, detachably arranging a pump pipe joint at a material distribution opening of the square pile die, and detachably arranging a funnel at a flash opening of the square pile die; raise the one end that closes on the flash opening of square pile mould for whole square pile mould is in the tilt state, the one end that the square pile mould was lifted is 1.5m with the perpendicular distance of the one end that does not raise, with the concrete that stirs in the first step, send into pump line joint through the delivery pump, through the cloth mouth, send into square pile mould inner chamber and carry out the cloth, the concrete is by the cloth mouth and go up to the flash opening and get into the funnel during the cloth, after having the appropriate amount concrete in the funnel, the cloth is ended.

Sixthly, after the material distribution is finished, the square pile mould is placed flat, the pump pipe joint is removed, the first temporary material blocking door is arranged, the material distribution port is sealed, then one end, close to the material overflowing port, of the square pile mould is lifted, so that the whole square pile mould is in an inclined state, the vertical distance between the lifted end of the square pile mould and the non-lifted end of the square pile mould is 1.5m, a proper amount of redundant concrete is guaranteed to be in the material overflowing port funnel, and the concrete is in a static stop state; and when the concrete is to be initially set, flattening the square pile mould, removing the funnel, flattening the concrete at the overflow port, installing a second temporary material blocking door and sealing the overflow port.

And seventhly, hoisting the square pile die provided with the second temporary plugging door into a normal-pressure steam curing pool for normal-pressure curing, wherein the first temporary plugging door and the second temporary plugging door are upward, removing the tensioning device after curing and forming, removing the curing and forming solid square pile, inspecting the solid square pile, and warehousing the qualified solid square pile.

Example 2

The square pile mould of this embodiment is the hollow square pile mould after reforming transform, includes:

an upper die and a lower die;

the material distribution port is arranged on the upper die of the square pile die and communicated with the inner cavity;

and the overflow port is arranged on the upper die of the square pile die and communicated with the inner cavity.

The production process flow chart of the modified hollow square pile mould is shown in figure 11, and the concrete steps are as follows:

firstly, respectively conveying bulk cement and an admixture to an electronic scale through a spiral pipe, metering, and putting the weighed bulk cement and the admixture into a stirrer; the qualified sand is conveyed into a stirrer through a belt conveyor after being measured by a sand electronic scale, the qualified broken stone is conveyed into the stirrer through the belt conveyor after being measured by a broken stone electronic scale, water and a water reducing agent are directly pumped to an electronic scale, and the water reducing agent are put into the stirrer after being measured, and all the components are stirred uniformly.

And secondly, cleaning the square pile die, and coating a release agent in the inner cavity of the die.

Thirdly, the longitudinal PC steel bar is subjected to fixed-length fine cutting through a fine cutting machine, and then pier head treatment is carried out to be used as a main rib; cold wire drawing is carried out on the stirrups, then the stirrups are wound on a binding machine, the stirrups are welded on the main reinforcements in a spiral shape by a seam welder to form a reinforcement cage, and then the non-prestressed reinforcements are fixed on the reinforcement cage through binding or spot welding; the end plate, the anchoring ribs and the apron plate are welded to form a pile head, and the pile head and the reinforcement cage bound with the non-prestressed ribs are assembled together to form the reinforcement cage with the pile head.

And fourthly, placing the reinforcement cage with the pile head into a lower die of the square pile die, closing the upper die and the lower die of the square pile die, moving the jack, adjusting the jack up and down to enable the tensioning rod to be aligned to the center of the square pile die, and performing longitudinal tensioning after the tensioning rod is aligned with the tensioning head and fastened to be a horizontal line.

Fifthly, detachably arranging a pump pipe joint at a material distribution opening of the square pile die, and detachably arranging a funnel at a flash opening of the square pile die; raise the one end that closes on the flash mouth of square pile mould for whole square pile mould is in the tilt state, the one end that the square pile mould was raised is 1.5m with the perpendicular distance of the one end that does not raise, with the concrete that stirs well in the first step, send into the pump line joint through the pay-off pump, through the cloth mouth, send into square pile mould intracavity and carry out the cloth, the concrete is by the cloth mouth and go up to the flash mouth and get into the funnel during the cloth, after having suitable amount concrete in the funnel, the cloth finishes.

Sixthly, after the material distribution is finished, flatting the square pile mould, removing the pump pipe joint, replacing a first temporary material blocking door, sealing the material distribution opening, then lifting one end of the square pile mould close to the material overflow opening to enable the whole square pile mould to be in an inclined state, wherein the vertical distance between the lifted end and the non-lifted end of the square pile mould is 1.5m, so that a proper amount of redundant concrete is ensured to be in a hopper at the material overflow opening, and the concrete is in a static stop state; and when the concrete is to be initially set, flattening the square pile mould, removing the funnel, flattening the concrete at the overflow port, installing a second temporary material blocking door and sealing the overflow port.

And seventhly, hoisting the square pile mould provided with the second temporary plugging door into a normal-pressure steam curing pool for normal-pressure curing, wherein the first temporary plugging door and the second temporary plugging door are upward, removing the tensioning device after curing and forming, removing the curing and forming solid square pile, inspecting the solid square pile, and warehousing the qualified solid square pile.

The specific embodiments described herein are merely illustrative of the spirit of the invention and do not limit the scope of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims (8)

1. A method for producing a solid square pile by using a hollow square pile die is characterized by comprising the following steps:

pumping the stirred concrete into the square pile die through a material distribution opening of the square pile die for material distribution, and lifting one end of the square pile die close to the material overflow opening;

detachably arranging a funnel at the flash port of the square pile mould, distributing concrete in the funnel at the flash port of the square pile mould, and finishing the distribution;

after the material distribution is finished, the square pile mould is laid flat, the material distribution opening is closed by a first temporary material blocking door, and then one end of the square pile mould close to the material overflow opening is lifted;

when the concrete is initially set, the square pile mould is laid flat, and the overflow port is sealed by a second temporary plugging door;

putting the square pile mould into a steam curing pool for steam curing;

the overflow port is arranged at one end part of the square pile die, and the cloth port is arranged between the other end part and the middle section of the square pile die.

2. The method as claimed in claim 1, wherein a pump pipe joint is detachably provided at the distributing port of the square pile mold, and the mixed concrete is supplied into the square pile mold through the pump pipe joint and the pump connection.

3. The method according to claim 1, wherein one end of the square pile die, which is close to the overflow port, is lifted, so that the vertical distance between the lifted end and the non-lifted end of the square pile die is 0.5-2m.

4. The method of claim 1, wherein the square pile mold is reformed from a hollow square pile mold.

5. The method of claim 1, wherein the square pile mold comprises:

an upper die and a lower die;

the material distribution port is arranged on the upper die of the square pile die;

and the overflow port is arranged on the upper die of the square pile die.

6. The method of claim 5, wherein the upper mold and the lower mold are fastened to form an inner cavity for casting concrete, and the distribution port and the flash port are in communication with the inner cavity.

7. The method of claim 1, wherein the square pile mold further comprises:

the first temporary material blocking door is detachably connected with the square pile die and used for closing the material distribution port;

and the second temporary material blocking door is detachably connected with the square pile die and used for sealing the overflow port.

8. The method of claim 1, wherein the solid square pile is a pre-stressed solid square pile and a partially pre-stressed solid square pile.

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