CN112281828A - Novel composite pile structure and construction method - Google Patents
Novel composite pile structure and construction method Download PDFInfo
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- CN112281828A CN112281828A CN202010971390.2A CN202010971390A CN112281828A CN 112281828 A CN112281828 A CN 112281828A CN 202010971390 A CN202010971390 A CN 202010971390A CN 112281828 A CN112281828 A CN 112281828A
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- steel pipe
- hollow steel
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/50—Piles comprising both precast concrete portions and concrete portions cast in situ
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
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- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a novel composite pile structure, which comprises a hollow steel pipe, a chassis, a guide frame and a rotating device, wherein the chassis is arranged on the ground to be constructed, and the guide frame is arranged on the chassis; the hollow steel pipe can penetrate through the through hole on the chassis and is driven into the lower part of the stratum; a drill bit structure is arranged below the hollow steel pipe, a plurality of stirring blades are arranged on the drill bit structure, and a guniting port is formed in the bottom of the drill bit structure; a grouting pipe is arranged in the hollow steel pipe, a slurry pump is connected above the grouting pipe, the lower part of the grouting pipe is communicated with a slurry spraying port, and the slurry enters the grouting pipe through the slurry pump and is sprayed out from the slurry spraying port; the hollow steel pipe is driven by the rotating device to rotate and move downwards. The invention also provides a construction method of the composite pile structure. The invention combines the steel pipe pile with large strength and the cement soil mixing pile with relatively small strength, has high strength and high bearing capacity, and simultaneously has good composite effect with the foundation soil.
Description
Technical Field
The invention belongs to the field of construction research of constructional engineering, and particularly relates to a novel composite pile structure and a construction method thereof.
Background
The pile structure used for foundation treatment is various in type, and the construction method is also diversified. Various types of piles have corresponding applicability, but have respective defects, such as large strength and bearing capacity of precast reinforced concrete piles and steel pipe piles, large difference between the strength of strong pile bodies and the strength of foundation soil, unobvious mutual composite action between the prefabricated reinforced concrete piles and the steel pipe piles, the underground stratum with high strength at a certain depth is needed to be used as a pile foundation bearing layer, the stratum which can be used as the bearing layer in urban construction is usually buried deep, the length of the piles is needed to be very long, and the construction cost is very high. In another type of pile, such as cement-soil mixing pile, mortar pile, gravel pile, etc., the strength of the pile body is relatively low, and the composite action with the foundation soil is relatively good, but because the strength of the pile body is relatively low, the bearing capacity is relatively low, and the application range is limited. The invention combines the two types of piles, has high strength and high bearing capacity in the aspect of pile structure, and has good composite effect with foundation soil. The construction cost can be greatly reduced on the premise of meeting the bearing requirement of the structure through effective calculation design.
Disclosure of Invention
The invention aims to provide a novel composite pile structure and a construction method thereof aiming at the defects of the prior art.
The invention adopts the following technical scheme:
a novel composite pile structure comprises a hollow steel pipe, a chassis, a guide frame and a rotating device, wherein the chassis is arranged on the ground to be constructed, and the guide frame is arranged on the chassis and can play a role in guiding; the chassis is provided with a through hole matched with the hollow steel pipe, and the hollow steel pipe can pass through the through hole in the chassis and enter the lower part of the stratum; a drill bit structure is arranged below the hollow steel pipe, a plurality of stirring blades are arranged on the drill bit structure, and a guniting port is formed in the bottom of the drill bit structure; a grouting pipe is arranged in the hollow steel pipe, a slurry pump is connected above the grouting pipe, the lower part of the grouting pipe is communicated with a slurry spraying port, and the slurry enters the grouting pipe through the slurry pump and is sprayed out from the slurry spraying port; the hollow steel pipe is driven by the rotating device to rotate and move downwards.
Furthermore, the upper part of the grouting pipe is connected with a slurry pump through a cement pipe.
Furthermore, a water joint is arranged above the hollow steel pipe and used for always keeping the grouting pipe and the cement pipe in a sealed communication state in the process that the grouting pipe rotates along with the steel pipe.
Furthermore, the drill bit structure comprises a cylindrical drill body and a conical drill bit, and the inner diameter of the drill body is smaller than that of the hollow steel pipe.
Further, the rotating device comprises a rotating device, a clamp holder and a lifting device, the lifting device is arranged on the chassis, the rotating device is arranged on the lifting device, the clamp holder is fixedly arranged on the rotating device, and the clamp holder clamps the hollow steel pipe; the hollow steel pipe is driven by the rotating device to rotate horizontally and move downwards under the driving of the lifting device, so that the hollow steel pipe can rotate and move downwards.
The construction method of the novel composite pile structure comprises the following steps:
s1, positioning the steel pipe:
taking a hollow steel pipe, installing a water joint at the top of the hollow steel pipe, connecting one end of a grouting pipe with a slurry pump, and leading the other end of the grouting pipe to pass through the water joint and into the bottom of the hollow steel pipe until the grouting pipe is communicated with a slurry spraying port; the hollow steel pipe is fixedly clamped by a clamp holder;
s2, rotationally sinking the steel pipe to the designed depth:
preparing cement slurry, and starting a slurry pump to inject the cement slurry into a grouting pipe; simultaneously starting the rotating device and the lifting device to drive the hollow steel pipe to rotate and sink simultaneously; cement paste is sprayed out from the cement paste spraying port, the stirring blade below the hollow steel pipe rotates to stir the soil layer on the outer side of the hollow steel pipe, and the cement paste sprayed out from the cement paste spraying port and the soil layer on the outer side are uniformly stirred until the stirring blade reaches the designed depth;
s3, pile grouting:
removing the grouting pipe and the water joint, pouring the mixed concrete into the hollow steel pipe, and solidifying the concrete to form pile core concrete;
s4, forming a pile:
the novel composite pile structure is formed by uniformly stirring and solidifying the pile core concrete, the hollow steel pipe, the soil outside the hollow steel pipe and the cement paste.
The invention has the beneficial effects that:
the invention overcomes the defects of the prior art, combines the steel pipe pile with high strength and the cement soil mixing pile with relatively low strength to form a novel composite pile structure, has high strength and high bearing capacity, has good composite effect with foundation soil, and can greatly reduce the construction cost on the premise of meeting the bearing of a structure through effective calculation design according to actual requirements. The invention has the advantages of reasonable design, simple structure, convenient assembly and disassembly, safety, reliability, strong applicability and wide popularization prospect.
Description of the drawings:
fig. 1 is a schematic structural diagram of a novel composite pile according to an embodiment of the invention;
FIG. 2 is a drawing of a composite pile constructing apparatus according to an embodiment of the present invention;
the reference numbers in the drawings are: 1. a steel pipe; 2. pile core concrete; 3. solidifying the cement soil; 4. a holder; 5. a turning device; 6. a water joint; 7. a cement slurry pipe; 8. a slurry pump; 9. a guide frame; 10. a lifting device; 11. a chassis; 12. a stirring blade; 13. a guniting port; 14. a grouting pipe; 15. a drill bit structure.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1-2, the invention provides a novel composite pile structure, which comprises a hollow steel pipe 1, a chassis 11, a guide frame 9 and a rotating device, wherein the chassis 11 is arranged on the ground to be constructed, and the guide frame 9 is arranged on the chassis 11; the chassis 11 is provided with a through hole matched with the hollow steel pipe 1, and the hollow steel pipe 1 can pass through the through hole in the chassis 11 to enter the lower part of the stratum; a drill bit structure 15 is arranged below the hollow steel pipe 1, a plurality of stirring blades 12 are arranged on the drill bit structure 15, and a guniting port 13 is formed in the bottom of the drill bit structure 15; a grouting pipe 14 is arranged in the hollow steel pipe 1, a slurry pump 8 is connected above the grouting pipe 14, the lower part of the grouting pipe 14 is communicated with a slurry spraying port 13, and the slurry enters the grouting pipe 14 through the slurry pump 8 and is sprayed out from the slurry spraying port 13; the hollow steel pipe 1 is driven by the rotating device to rotate and move downwards.
In the embodiment of the invention, the upper part of the grouting pipe 14 is connected with a slurry pump 8 through a cement pipe 7.
In the embodiment of the invention, a water joint 6 is arranged above the hollow steel pipe 1 and used for always keeping the grouting pipe 14 and the cement slurry pipe 7 in a sealed communication state in the process that the grouting pipe 14 rotates along with the steel pipe 1.
In the embodiment of the present invention, the drill structure 15 includes a drill body in a cylindrical shape and a drill in a conical shape, and the inner diameter of the drill body is smaller than the inner diameter of the hollow steel pipe 1.
In the embodiment of the invention, the rotating device comprises a rotating device 5, a clamp 4 and a lifting device 10, the lifting device 10 is arranged on a chassis 11, the rotating device 5 is arranged on the lifting device 10, the clamp 4 is fixedly arranged on the rotating device 5, and the clamp 4 clamps the hollow steel pipe 1; the hollow steel pipe 1 is driven by the rotating device 5 to horizontally rotate and driven by the lifting device 10 to move downwards, so that the hollow steel pipe 1 can rotate and move downwards.
The invention also provides a construction method of the novel composite pile structure, which comprises the following steps:
s1, positioning the steel pipe:
taking a hollow steel pipe 1, installing a water joint 6 at the top of the hollow steel pipe 1, connecting one end of a grouting pipe 14 with a slurry pump 8, and leading the other end of the grouting pipe 14 to pass through the water joint 6 and be introduced into the bottom of the hollow steel pipe 1 until the grouting pipe is communicated with a slurry spraying port 13; the hollow steel pipe 1 is fixedly clamped by a clamp 4;
s2, rotationally sinking the steel pipe to the designed depth:
preparing cement slurry, and starting a slurry pump 8 to inject the cement slurry into a grouting pipe 14; simultaneously starting the rotating device 5 and the lifting device 10 to drive the hollow steel pipe 1 to rotate and sink simultaneously; the cement paste is sprayed out from the cement paste spraying port 13, the stirring blade 12 below the hollow steel pipe 1 rotates to stir the soil layer on the outer side of the hollow steel pipe 1, and the cement paste sprayed out from the cement paste spraying port 13 and the soil layer on the outer side are uniformly stirred until the stirring blade 12 reaches the designed depth;
s3, pile grouting:
removing the grouting pipe 14 and the water joint 6, pouring the mixed concrete into the hollow steel pipe 1, and forming pile core concrete 2 after the concrete is solidified;
s4, forming a pile:
the pile core concrete 2, the hollow steel pipe 1 and the solidified cement soil 3 formed by uniformly mixing and solidifying the soil outside the hollow steel pipe 1 and the cement paste form a novel composite pile structure.
The invention combines the steel pipe pile with large strength and the cement soil mixing pile with relatively small strength to form a novel composite pile structure, compared with the prior art, the invention has high strength and high bearing capacity, simultaneously has good composite effect with the foundation soil, and can greatly reduce the construction cost on the premise of meeting the bearing of a structure through effective calculation design according to the actual requirement. The invention has the advantages of reasonable design, simple structure, convenient assembly and disassembly, safety, reliability, strong applicability and wide popularization prospect.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention, it should be noted that, for those skilled in the art, several modifications and decorations without departing from the principle of the present invention should be regarded as the protection scope of the present invention.
Claims (6)
1. The novel composite pile structure is characterized by comprising a hollow steel pipe (1), a chassis (11), a guide frame (9) and a rotating device, wherein the chassis (11) is arranged on the ground to be constructed, and the guide frame (9) is arranged on the chassis (11); the chassis (11) is provided with through holes matched with the hollow steel pipes (1), and the hollow steel pipes (1) can pass through the through holes in the chassis (11) to enter the lower part of the stratum; a drill bit structure (15) is arranged below the hollow steel pipe (1), a plurality of stirring blades (12) are arranged on the drill bit structure (15), and a guniting port (13) is formed in the bottom of the drill bit structure (15); a grouting pipe (14) is arranged in the hollow steel pipe (1), a slurry pump (8) is connected above the grouting pipe (14), the lower part of the grouting pipe (14) is communicated with a slurry spraying port (13), and the slurry enters the grouting pipe (14) through the slurry pump (8) and is sprayed out from the slurry spraying port (13); the hollow steel pipe (1) is driven by the rotating device to rotate and move downwards.
2. A novel composite pile structure according to claim 1, characterised in that the slurry pump (8) is connected above the grouting pipe (14) by a cement pipe (7).
3. The novel composite pile structure according to claim 1, characterized in that a water joint (6) is installed above the hollow steel pipe (1).
4. A novel composite pile structure according to claim 1, characterised in that the drill bit structure (15) comprises a drill body in the shape of a cylinder and a drill bit in the shape of a cone, the inner diameter of the drill body being smaller than the inner diameter of the hollow steel tube (1).
5. The novel composite pile structure according to claim 1, wherein the rotating device comprises a rotating device (5), a clamp (4) and a lifting device (10), the lifting device (10) is arranged on a chassis (11), the rotating device (5) is arranged on the lifting device (10), the clamp (4) is fixedly arranged on the rotating device (5), and the clamp (4) clamps the hollow steel pipe (1); the hollow steel pipe (1) is driven by the rotating device (5) to horizontally rotate and driven by the lifting device (10) to move downwards, so that the hollow steel pipe (1) can rotate and move downwards.
6. The construction method of a novel composite pile structure according to any one of claims 1 to 5, characterized by comprising the steps of:
s1, positioning the steel pipe:
taking a hollow steel pipe (1), installing a water joint (6) at the top of the hollow steel pipe (1), connecting one end of a grouting pipe (14) with a slurry pump (8), and leading the other end of the grouting pipe (14) to pass through the water joint (6) and be introduced into the bottom of the hollow steel pipe (1) until the grouting pipe is communicated with a slurry spraying port (13); the hollow steel pipe (1) is fixedly clamped by a clamp (4);
s2, rotationally sinking the steel pipe to the designed depth:
preparing cement slurry, and starting a slurry pump (8) to inject the cement slurry into the grouting pipe (14); simultaneously starting the rotating device (5) and the lifting device (10) to drive the hollow steel pipe (1) to rotate and sink; cement paste is sprayed out from the grout spraying port (13), the stirring blade (12) below the hollow steel pipe (1) rotates to stir the soil layer on the outer side of the hollow steel pipe (1), and the cement paste sprayed out from the grout spraying port (13) and the soil layer on the outer side are uniformly stirred until the stirring blade (12) reaches the designed depth;
s3, pile grouting:
removing the grouting pipe (14) and the water joint (6), pouring the mixed concrete into the hollow steel pipe (1), and forming pile core concrete (2) after the concrete is solidified;
s4, forming a pile:
the novel composite pile structure is formed by the pile core concrete (2), the hollow steel pipe (1), and the solidified cement soil (3) formed by uniformly mixing and solidifying the soil outside the hollow steel pipe (1) and cement paste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010971390.2A CN112281828A (en) | 2020-09-16 | 2020-09-16 | Novel composite pile structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010971390.2A CN112281828A (en) | 2020-09-16 | 2020-09-16 | Novel composite pile structure and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN112281828A true CN112281828A (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010971390.2A Pending CN112281828A (en) | 2020-09-16 | 2020-09-16 | Novel composite pile structure and construction method |
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| Country | Link |
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| CN (1) | CN112281828A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114319351A (en) * | 2022-01-13 | 2022-04-12 | 山东高速集团有限公司创新研究院 | Super-large-diameter cement soil tubular pile construction device and construction method |
| CN114607282A (en) * | 2022-03-30 | 2022-06-10 | 山东高速建设管理集团有限公司 | Construction drill bit and method capable of constructing polymorphic cement soil mixing pile |
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| US20070177948A1 (en) * | 2006-02-02 | 2007-08-02 | Nova Group Inc. | Pre-cast/pre-stressed concrete and steel pile and method for installation |
| CN101215836A (en) * | 2007-12-29 | 2008-07-09 | 雷玉华 | Construction machinery used for large diameter hollow pile and its construction method and use |
| CN105113498A (en) * | 2015-08-17 | 2015-12-02 | 建设综合勘察研究设计院有限公司 | Method for constructing high-strength core composite piles |
| CN105442589A (en) * | 2015-08-17 | 2016-03-30 | 建设综合勘察研究设计院有限公司 | Stiffening core composite pile one-time forming machine |
| CN110306544A (en) * | 2019-06-24 | 2019-10-08 | 中冶集团武汉勘察研究院有限公司 | A kind of pile-forming equipment and construction method of stiff-core cement soil mixing pile |
-
2020
- 2020-09-16 CN CN202010971390.2A patent/CN112281828A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070177948A1 (en) * | 2006-02-02 | 2007-08-02 | Nova Group Inc. | Pre-cast/pre-stressed concrete and steel pile and method for installation |
| CN101215836A (en) * | 2007-12-29 | 2008-07-09 | 雷玉华 | Construction machinery used for large diameter hollow pile and its construction method and use |
| CN105113498A (en) * | 2015-08-17 | 2015-12-02 | 建设综合勘察研究设计院有限公司 | Method for constructing high-strength core composite piles |
| CN105442589A (en) * | 2015-08-17 | 2016-03-30 | 建设综合勘察研究设计院有限公司 | Stiffening core composite pile one-time forming machine |
| CN110306544A (en) * | 2019-06-24 | 2019-10-08 | 中冶集团武汉勘察研究院有限公司 | A kind of pile-forming equipment and construction method of stiff-core cement soil mixing pile |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114319351A (en) * | 2022-01-13 | 2022-04-12 | 山东高速集团有限公司创新研究院 | Super-large-diameter cement soil tubular pile construction device and construction method |
| CN114607282A (en) * | 2022-03-30 | 2022-06-10 | 山东高速建设管理集团有限公司 | Construction drill bit and method capable of constructing polymorphic cement soil mixing pile |
| CN114607282B (en) * | 2022-03-30 | 2023-12-01 | 山东高速建设管理集团有限公司 | Construction drill bit and method capable of constructing polymorphic cement-soil mixing pile |
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Application publication date: 20210129 |
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