CN115748688A - Bag type enlarged footing prefabricated hollow pile and construction method thereof - Google Patents
Bag type enlarged footing prefabricated hollow pile and construction method thereof Download PDFInfo
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- CN115748688A CN115748688A CN202211475144.3A CN202211475144A CN115748688A CN 115748688 A CN115748688 A CN 115748688A CN 202211475144 A CN202211475144 A CN 202211475144A CN 115748688 A CN115748688 A CN 115748688A
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Abstract
The invention discloses a bag type enlarged footing prefabricated hollow pile and a construction method thereof, wherein the bag type enlarged footing prefabricated hollow pile comprises a prefabricated pile body, two reserved steel pipe grouting channels are arranged inside the prefabricated pile body, two grout outlets are formed in the lower ends of the reserved steel pipe grouting channels, check films are arranged at the grout outlets and fixed with the side wall of the prefabricated pile body through fixing bolts, a plurality of annular pile tooth-shaped bulges are arranged on the outer wall of the prefabricated pile body, an expandable bag is arranged at the lower end of the prefabricated pile body, the bag is fixed with the prefabricated pile body at a groove of the pile body through a bag hoop, and the two grout outlets are both positioned inside the bag; the invention can inject slurry into the bag from the reserved steel pipe grouting hole according to the design requirement mainly through the matching of the bag, the prefabricated pile body and the reserved steel pipe grouting hole, can improve the pulling resistance, the horizontal lateral displacement resistance and the vertical bearing capacity of the pile foundation by times through the mode of grouting and opening the bag at the pile bottom, and has simple manufacturing process.
Description
Technical Field
The invention belongs to the technical field of pile foundation engineering, and particularly relates to a bag type expanded head prefabricated hollow pile and a construction method thereof.
Background
The precast pile has the advantages of high construction efficiency, convenience in transportation, stable quality, economy, environmental friendliness and the like, and is widely applied along with the popularization of the precast pile. In recent years, the requirement on the compression resistance and the pulling resistance of the precast pile is continuously improved, and the existing solution is to select the precast pile with the enlarged section size and the lengthened pile body so as to improve the compression resistance and the pulling resistance of the pile body.
The foundation pile of underwater structures such as an overwater solar photovoltaic pile foundation and the like has low requirements on bearing capacity but has high requirements on horizontal displacement resistance of the pile, a part of the pile enters an underwater soil layer, and the majority of the pile is in water and on the water surface.
Because the surface of the precast pile is smooth, the frictional resistance between the pile body and the contact soil body is often small, the compressive strength of the pile body per se is far greater than the design bearing capacity requirement according to the actual construction experience, and sometimes the section size of the pile has to be enlarged to improve the pulling resistance and the vertical bearing capacity of the pile foundation due to the small diameter of the pile end, so that the precast hollow pile with the end bag type enlarged head and the construction method thereof need to be provided.
Disclosure of Invention
The invention aims to provide a bag type expanded head prefabricated hollow pile and a construction method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the bag type enlarged footing prefabricated hollow pile comprises a prefabricated pile body, wherein two reserved steel pipe grouting holes are formed in the prefabricated pile body, two grout outlets are formed in the lower end of each reserved steel pipe grouting hole, a check film is arranged at the grout outlet and fixed to the side wall of the prefabricated pile body through fixing bolts, a plurality of annular pile tooth-shaped protrusions are arranged on the outer wall of the prefabricated pile body, an expandable bag is arranged at the lower end of the prefabricated pile body, the bag is fixed to the prefabricated pile body through a bag hoop, the grout outlets are located in the bag, grout is injected into the bag, and a pressure gauge capable of measuring grouting pressure is arranged at the upper end of the prefabricated pile body.
Preferably, the two grout outlets are respectively positioned on the side walls of two opposite sides of the lower end of the prefabricated pile body and symmetrically arranged, and one end of the non-return rubber sheet is provided with a screw hole for mounting a fixing bolt.
Preferably, the number of the bag hoops is two, the two bag hoops are respectively located at two ends of the bag, and two ends of the bag hoops are fixed with the side wall of the prefabricated pile body through high-strength bolts.
Preferably, the two grout outlets are located at the pile bottom of the lower end of the prefabricated pile body, the bag is sleeved at the lower end of the prefabricated pile body, the bag hoop is located at the upper end of the bag, and the bag hoop is fixed with the side wall of the prefabricated pile body through a high-strength bolt.
Preferably, the bag is sleeved with a bag protective shell, the bag protective shell is a plastic shell, one end of the bag protective shell is fixed to one side of the bag hoop, slurry is injected into the bag to stretch the bag protective shell, the bag is protected by the bag protective shell in the pile pressing process, and the end part of the lower end of the prefabricated pile body is sealed by a sealing plate.
Preferably, the diameter of the expanded bladder is 1.5-3 times of the diameter or the section size of the prefabricated pile body, the grout is one of cement grout, cement mortar and UHPC high-strength concrete, one of water glass and a curing agent and the grout can be alternately injected during grouting to accelerate the hardening speed and improve the compressive strength and the tensile strength of the grout after being cured and the bonding strength of the grout after being cured and the prefabricated pile body.
Preferably, the precast pile body is a prestressed concrete hollow pile, the pile diameter of the pipe pile of the precast pile body or the side length of the section of the square pile is adjusted within 200-800mm, the outer diameter of the pipe pile of the precast pile body or the side length of the section of the square pile is set to D, the outer diameter of the bag is set to D, the connection height of the grout injected into the bag and the precast pile body is set to h, and the D, the D and the h meet the following numerical relationship of h = D/2+d.
Preferably, the prefabricated pile body is provided with an upper pile and a lower pile which are distributed as an upper pile and a lower pile, the upper pile and the lower pile are in socket joint with a reserved steel pipe grouting hole, the pile connecting position of the upper pile and the lower pile is fully welded in a welding mode, the bag is arranged at the pile connecting position of the upper pile and the lower pile, the upper end of the bag is fastened at the pile bottom of the upper pile by a bag hoop, and the lower end of the bag is fastened at the pile top of the lower pile by the bag hoop.
Preferably, the precast pile body is manufactured by using a mold, a ring pile recess and an outward protruding steel ring belt are arranged in the mold, the ring pile recess is used for manufacturing a ring pile tooth-shaped protrusion, and the outward protruding steel ring belt is used for generating a groove which is 5cm in height and 1cm in depth at the position where the preformed pile body is provided with the bag hoop.
Based on the bag type expanded head precast tubular pile described above, the invention also provides a construction method of the bag type expanded head precast tubular pile, which comprises the following steps:
s1, positioning: positioning and paying off are carried out according to a pile position design drawing;
s2, pile pressing: reasonably selecting and utilizing a static pile machine, a hammering pile machine and a driving and pulling machine to drive the prefabricated pile body into a design position of a construction drawing according to construction conditions, and controlling the pile position deviation and the perpendicularity of the prefabricated pile body during pile driving;
s3, grouting: grouting materials are selected according to design requirements, grouting amount is calculated according to the design number and the positions of the bags to prepare grout, and grouting pressure is adjusted;
s4, sealing: and (4) carrying out dual control on grouting quantity and grouting pressure, stopping grouting after parameters meet design requirements, and sealing the pile top in time to complete the construction of the pile body.
Compared with the prior art, the bag type expanded head prefabricated hollow pile and the construction method thereof provided by the invention have the following advantages:
1. according to the invention, slurry can be injected into the bag from the reserved steel pipe grouting hole according to the design requirement through the matching of the bag, the prefabricated pile body and the reserved steel pipe grouting hole, the pile foundation pulling resistance, the horizontal lateral displacement resistance and the vertical bearing capacity can be improved by times through the mode of grouting and opening the bag at the pile bottom, the manufacturing process is simple, and the pile foundation pulling resistance and horizontal lateral displacement resistance and vertical bearing capacity resistance are worth of being popularized vigorously.
2. According to the invention, through the arrangement of the pressure gauge, the grouting pressure can be adjusted through the pressure value displayed on the pressure gauge, the grouting amount and the grouting pressure are dually controlled, and the grouting is stopped and the pile top of the prefabricated pile body is sealed in time after the parameters reach the design requirements.
3. The invention can prevent the grout from flowing back into the reserved steel pipe grouting pore channel after grouting through the non-return rubber sheet arranged at the grout outlet.
4. According to the invention, the grouting bags are arranged at the pile splicing positions of the upper pile and the lower pile, so that the joint between the piles originally soaked in seawater can be protected, and the horizontal load resistance of the weak position of the prefabricated pile joint can be greatly enhanced.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a schematic structural diagram after grouting in example 1 of the present invention;
FIG. 3 is a schematic view of a structure of a slurry outlet in embodiment 1 of the present invention;
FIG. 4 is a schematic top view of a structure (hollow tubular pile) in accordance with embodiment 1 of the present invention;
FIG. 5 is a schematic top view of a structure (hollow square pile) according to example 1 of the present invention;
FIG. 6 is a schematic structural view of example 2 of the present invention;
FIG. 7 is a schematic structural diagram of the grouting process in embodiment 2 of the present invention;
FIG. 8 is a schematic view of a structure of a slurry outlet in embodiment 2 of the present invention;
FIG. 9 is a flow chart of a construction method of the present invention.
FIG. 10 is a schematic view of the mold of the present invention;
FIG. 11 is a schematic structural view of example 3 of the present invention;
fig. 12 is a schematic view of an inserting connection structure of an upper pile and a lower pile according to embodiment 3 of the present invention;
fig. 13 is a schematic diagram of the expanded top structure of the bladder (hollow tubular pile) of example 3 of the present invention;
fig. 14 is an expanded top view of the capsular bag of example 3 of the present invention (hollow square pile).
In the figure: 1. prefabricating a pile body; 2. reserving a steel pipe grouting channel; 3. a pouch; 4. a hoop of the bag; 5. a high-strength bolt; 6. a ring pile tooth-shaped bulge; 7. a pulp outlet; 9. a non-return film; 10. fixing the bolt; 11. a pressure gauge; 12. slurry; 13. a pouch protective shell; 14. a sealing plate; 15. a mold; 16. the annular piles are sunken; 17. and the steel ring belt protrudes outwards.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention provides a bag type enlarged footing prefabricated hollow pile as shown in figures 1-5, 9 and 10, which comprises a prefabricated pile body 1, wherein two reserved steel pipe grouting hole channels 2 are arranged inside the prefabricated pile body 1, two grout outlets 7 are arranged at the lower ends of the reserved steel pipe grouting hole channels 2, a non-return rubber sheet 9 is arranged at the grout outlets 7, the non-return rubber sheet 9 is fixed with the side wall of the prefabricated pile body 1 through a fixing bolt 10 and can prevent grout 12 after grouting from flowing back into the reserved steel pipe grouting hole channels 2, a plurality of annular pile toothed bulges 6 are arranged on the outer wall of the prefabricated pile body 1, the positions and the sizes of the annular pile toothed bulges 6 can be adjusted and calculated according to actual engineering requirements, an expandable bag 3 is arranged at the lower end of the prefabricated pile body 1, the bag 3 is fixed with the prefabricated pile body 1 through a bag 4, the two grout outlets 7 are both positioned inside the bag 3, the annular pile toothed bulges 6 are arranged inside the bag 3, so that the engagement force between a prefabricated pile body 1 and a hoop 3 can be increased, the pile body can be tightly connected with the hoop 12 after mechanical grouting, and the pile body can be tightly connected with the shear resistance of the pile body; the upper end of the precast pile body 1 is provided with a pressure gauge 11, and the grouting amount and the pressure displayed by the pressure gauge 11 are used for double control of the grouting amount and the grout 12 injection.
Two grout outlets 7 are located the relative both sides lateral wall of precast pile body 1 lower extreme, and two grout outlets 7 are the symmetry and set up, the screw that supplies fixing bolt 10 installation is seted up to the one end of non return film 9.
The number of the bag hoops 4 is two, the two bag hoops 4 are respectively located at two ends of the bag 3, and two ends of the bag hoops 4 are fixed with the side wall of the prefabricated pile body 1 through high-strength bolts 5.
The diameter of the expanded bag 3 is 1.5-3 times of the diameter or the section size of the prefabricated pile body 1, the bag 3 can be provided with positions and required number according to actual engineering requirements, each bag 3 corresponds to two grout outlets 7, the grout 12 is provided with one of cement grout, cement mortar and UHPC high-strength concrete, one of water glass and curing agent and the grout can be alternately injected during grouting to accelerate the hardening speed, the compressive strength and the tensile strength of the solidified grout and the bonding strength of the solidified grout and the prefabricated pile body are improved, and the material for injecting the grout 12 into the bag 3 can be selectively injected according to the engineering requirements.
The prefabricated pile body 1 is a prestressed concrete hollow pile or a hollow square pile, the pile diameter of the prefabricated pile body 1 is adjusted within 200-800mm, the outer diameter of a tubular pile of the prefabricated pile body 1 or the side length of the cross section of the square pile is set to D, the outer diameter of the bag 3 or the side length of the cross section is set to D, the height of the connection between slurry 12 injected into the bag 3 and the prefabricated pile body 1 is set to h, and the D, the D and the h meet the following numerical relationship that h = D/2+d.
When the grouting device is used, slurry 12 can be injected into the bags 3 from the reserved steel pipe grouting hole 2 according to design requirements, grouting materials are selected according to design requirements, the grouting amount is calculated according to the design number and the position of the bags 3 to allocate slurry, the grouting pressure is adjusted, the grouting amount and the grouting pressure are subjected to dual control, grouting is stopped after parameters reach the design requirements, the pile top of the prefabricated pile body 1 is sealed in time, the bags 3 at the bottom of the pile are propped open at the moment, the pile foundation pulling resistance, the horizontal lateral displacement resistance and the vertical bearing capacity can be improved in a multiplied mode of propping open the bags 3 through grouting at the bottom of the pile, the manufacturing process is simple, and the grouting device is worthy of great popularization.
As shown in fig. 10, the precast pile body 1 is manufactured by using a mold 15, a ring pile recess 16 and an outward protruding steel ring belt 17 are arranged inside the mold 15, the ring pile recess 16 is used for manufacturing the ring pile tooth-shaped protrusion 6, and the outward protruding steel ring belt 17 is used for generating a groove 5cm high and 1cm deep at the position where the bag hoop 4 is arranged on the precast pile body 1, so as to improve the effect of fixing the bag 3 by the bag hoop 4.
Based on the bag-type enlarged head precast tubular pile described above, the invention further provides a construction method of the bag-type enlarged head precast tubular pile, as shown in fig. 9, including the following steps:
s1, positioning: positioning and paying off are carried out according to a pile position design drawing;
s2, pile pressing: according to construction conditions, a static pile machine, a hammering pile machine and a drawing machine are reasonably selected and utilized to drive the prefabricated pile body into a design position of a construction drawing, and pile position deviation and the perpendicularity of the prefabricated pile body are controlled during pile driving;
s3, grouting: grouting materials are selected according to design requirements, grouting amount is calculated according to the design number and the positions of the bags 3 to prepare grout 12, and grouting pressure is adjusted;
s4, sealing: and (4) carrying out dual control on grouting quantity and grouting pressure, stopping grouting after parameters meet design requirements, and sealing the pile top in time to complete the construction of the pile body.
Example 2
The same parts are not repeated, and different from embodiment 1, as shown in fig. 6 to 8, two slurry outlets 7 are located at the pile bottom of the lower end of the precast pile body 1, the bag 3 is sleeved at the lower end of the precast pile body 1, the bag anchor ear 4 is located at the upper end of the bag 3, the bag anchor ear 4 is fixed to the side wall of the precast pile body 1 through a high-strength bolt 5, the position of the bag anchor ear 4 is within 50cm from the pile bottom, and the rest positions of the bag 3 are all closed states.
The outside cover of bag 3 has bag protective housing 13, bag protective housing 13 sets up to the plastic casing, the one end of bag protective housing 13 is fixed with one side of bag staple bolt 4, it can strut bag protective housing 13 to inject thick liquid 12 in the bag 3, tip bag 3 is protected by bag protective housing 13 in the pile pressing in-process, 1 lower extreme tip of precast pile body is sealed by sealing plate 14, prevents that thick liquid 12 in the bag 3 from flowing back into 1 inside hole of precast pile body. The bag 3 is sleeved into the bag protecting shell 13, so that the bag 3 is prevented from being damaged due to excessive friction force during pile pressing, and after the pile body is pressed into a designed position, the bag protecting shell 13 can be easily opened by grouting into the bag 3 at the bottom, and grout 12 can be smoothly injected.
Example 3
The same parts are not repeated, and different from the embodiment 1 and the embodiment 2, as shown in fig. 11-14, the prefabricated pile body 1 is provided with an upper pile and a lower pile which are distributed into an upper pile and a lower pile, the upper pile and the lower pile are provided with a reserved steel pipe grouting hole 2 for socket joint connection, the joint of the upper pile and the lower pile is fully welded by adopting a welding mode, the bag 3 is arranged at the pile joint position of the upper pile and the lower pile, the upper end of the bag 3 is fastened at the pile bottom of the upper pile by the bag anchor ear 4, the lower end of the bag 3 is fastened at the pile top of the lower pile by the bag anchor ear 4, the prefabricated pile body 1 can be pressed to a design position and then can be grouted into the bag through the grout outlet 7 at the pile bottom of the upper pile, the grouting bag 3 is arranged at the pile joint position of the upper pile and the lower pile, so that the joint infiltrated between the seawater pile and the original pile can be protected, and the weak position of the prefabricated pile joint can be greatly enhanced in resisting horizontal load.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a pocket formula enlarged footing precast hollow pile, includes precast pile body (1), its characterized in that: the prefabricated pile body comprises a prefabricated pile body (1), and is characterized in that two reserved steel pipe grouting channels (2) are arranged in the prefabricated pile body (1), the lower ends of the reserved steel pipe grouting channels (2) are provided with two grout outlets (7), check films (9) are arranged at the grout outlets (7), the check films (9) are fixed with the side wall of the prefabricated pile body (1) through fixing bolts (10), the outer wall of the prefabricated pile body (1) is provided with a plurality of annular pile toothed bulges (6), the lower end of the prefabricated pile body (1) is provided with an expandable bag (3), the bag (3) is fixed with the prefabricated pile body (1) through a bag hoop (4), the grout outlets (7) are located in the bag (3), grout (12) is injected into the bag (3), and a pressure gauge (11) capable of measuring grouting pressure is arranged at the upper end of the prefabricated pile body (1).
2. The bag-type enlarged-head prefabricated hollow pile as claimed in claim 1, wherein: two grout outlets (7) are respectively located the opposite side walls at the lower end of the prefabricated pile body (1), the grout outlets (7) are symmetrically arranged, and one end of the non-return rubber sheet (9) is provided with a screw hole for installing a fixing bolt (10).
3. The bag-type enlarged-head prefabricated hollow pile as claimed in claim 2, wherein: the pile is characterized in that the number of the bag hoops (4) is two, the two bag hoops (4) are respectively located at two ends of the bag (3), and two ends of each bag hoop (4) are fixed with the side wall of the prefabricated pile body (1) through high-strength bolts (5).
4. The bag-type enlarged-head prefabricated hollow pile as claimed in claim 1, wherein: the two grout outlets (7) are located at the pile bottom of the lower end of the prefabricated pile body (1), the bag (3) is sleeved at the lower end of the prefabricated pile body (1), the bag hoop (4) is located at the upper end of the bag (3), and the bag hoop (4) is fixed with the side wall of the prefabricated pile body (1) through the high-strength bolt (5).
5. The bag-type enlarged-head prefabricated hollow pile as claimed in claim 4, wherein: the utility model discloses a pile pressing pile, including bag, grout (12) and preformed pile body (1), the outside cover of bag (3) has bag protective housing (13), bag protective housing (13) sets up to the plastic casing, the one end of bag protective housing (13) is fixed with one side of bag staple bolt (4), it can strut bag protective housing (13) to inject grout (12) in bag (3), bag (3) are protected by bag protective housing (13) at the pile pressing in-process, preformed pile body (1) lower extreme tip is sealed by sealing plate (14).
6. The bag-type enlarged-head prefabricated hollow pile as claimed in claim 1, wherein: the diameter of the expanded bag (3) is 1.5-3 times of the diameter or the side length of the cross section of the precast pile body (1), the grout (12) is one of cement grout, cement mortar and UHPC high-strength concrete, one of water glass and a curing agent and the grout (12) can be alternately injected during grouting to accelerate the hardening speed and improve the compressive strength and the tensile strength of the grout after being cured and the bonding strength of the grout after being cured and the precast pile body (1).
7. The bag-type enlarged-head prefabricated hollow pile as claimed in claim 1, wherein: the prefabricated pile body (1) is set to be a prestressed concrete hollow pipe pile or a hollow square pile, the diameter of the pipe pile or the side length of the section of the square pile of the prefabricated pile body (1) is adjusted within 200-800mm, the outer diameter of the pipe pile or the side length of the section of the square pile of the prefabricated pile body (1) is set to be D, the outer diameter or the side length of the section of the bag (3) is set to be D, the height of the connection between slurry (12) injected into the bag (3) and the prefabricated pile body (1) is set to be h, and the D, the D and the h meet the following numerical relation of h = D/2+d.
8. The bag-type enlarged-head prefabricated hollow pile as claimed in claim 1, wherein: the prefabricated pile body (1) is provided with an upper pile and a lower pile which are distributed in an upper pile and a lower pile, the upper pile and the lower pile are in socket joint with a steel pipe grouting hole (2) reserved in the lower pile, the pile connecting positions of the upper pile and the lower pile are fully welded in a welding mode, the bag (3) is arranged at the pile connecting positions of the upper pile and the lower pile, the upper end of the bag (3) is fastened at the pile bottom of the upper pile by a bag hoop (4), and the lower end of the bag (3) is fastened at the pile top of the lower pile by the bag hoop (4).
9. The bag-type enlarged-head precast hollow pile according to any one of claims 1 to 8, wherein: the prefabricated pile body (1) is manufactured by using a mold (15), a ring pile recess (16) and an outward protruding steel ring belt (17) are arranged inside the mold (15), the ring pile recess (16) is used for manufacturing a ring pile tooth-shaped protrusion (6), and the outward protruding steel ring belt (17) is used for generating a groove with the height of 5cm and the depth of 1cm at the position where the preformed pile body (1) is provided with the hoop (4).
10. A construction method of a bag-type enlarged-head prefabricated hollow pile according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:
s1, positioning: positioning and paying off are carried out according to a pile position design drawing;
s2, pile pressing: according to construction conditions, a static pile machine, a hammering pile machine and a drawing machine are reasonably selected and utilized to drive the prefabricated pile body into a design position of a construction drawing, and pile position deviation and the perpendicularity of the prefabricated pile body are controlled during pile driving;
s3, grouting: grouting materials are selected according to design requirements, grouting amount is calculated according to the design number and the positions of the bags to prepare grout, and grouting pressure is adjusted;
s4, sealing: and (4) carrying out dual control on grouting quantity and grouting pressure, stopping grouting after parameters meet design requirements, and sealing the pile top in time to complete the construction of the pile body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211475144.3A CN115748688A (en) | 2022-11-23 | 2022-11-23 | Bag type enlarged footing prefabricated hollow pile and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211475144.3A CN115748688A (en) | 2022-11-23 | 2022-11-23 | Bag type enlarged footing prefabricated hollow pile and construction method thereof |
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| CN115748688A true CN115748688A (en) | 2023-03-07 |
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| CN202211475144.3A Pending CN115748688A (en) | 2022-11-23 | 2022-11-23 | Bag type enlarged footing prefabricated hollow pile and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116872347A (en) * | 2023-08-25 | 2023-10-13 | 南通欧本建筑科技有限公司 | Precast pile production device and structure with surface beating slurry |
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2022
- 2022-11-23 CN CN202211475144.3A patent/CN115748688A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116872347A (en) * | 2023-08-25 | 2023-10-13 | 南通欧本建筑科技有限公司 | Precast pile production device and structure with surface beating slurry |
| CN116872347B (en) * | 2023-08-25 | 2024-02-23 | 南通欧本建筑科技有限公司 | Precast pile production device and structure with surface beating slurry |
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