CN112343045A - Static pressure pipe pile sinking device with recyclable pile tip and construction method - Google Patents
Static pressure pipe pile sinking device with recyclable pile tip and construction method Download PDFInfo
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- CN112343045A CN112343045A CN202011060282.6A CN202011060282A CN112343045A CN 112343045 A CN112343045 A CN 112343045A CN 202011060282 A CN202011060282 A CN 202011060282A CN 112343045 A CN112343045 A CN 112343045A
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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
- E02D5/72—Pile shoes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/20—Placing by pressure or pulling power
Abstract
The invention relates to a static pressure pipe pile sinking device with a recyclable pile tip and a construction method. When the pile is pressed, the static pressure pile machine holds the outer steel pipe to press the pile downwards, the outer steel pipe transmits pressure to the sliding bearing block through the pile shoe, so that the whole pile tip is driven to move downwards, and the soil body is squeezed open to sink into the outer steel pipe and the pile tip; the invention has simple structure and reasonable design, and is provided with the outer sleeve, the inner pile tip and the connecting piece; the acting force of the inner pile tip, the sliding bearing block and the outer sleeve is perfectly transmitted through the sliding conical steel pipe, the pile tip is recovered, the construction cost of the soil-squeezing cast-in-place pile is greatly reduced, the bearing capacity of a pile foundation is improved, and the pollution of slurry to the environment is reduced.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a static pressure pipe pile sinking device with a recyclable pile tip and a construction method.
Background
At present, the types of pile foundations used in various projects are dozens of, and according to different construction processes, the current leading pile types in China are divided into a bored pile, a vibrating bored pile, a rammed pile, a manual hole digging pile, a prestressed pipe pile, various flexible semi-flexible piles (such as a cement mixing pile and a powder spraying pile, a high-pressure rotary spraying pile, a sand pile or a gravel pile) for soft foundation treatment and the like. With respect to the various types of leading pile types currently used, the following problems exist:
(1) quality problems such as pile breakage, necking, separation and mud inclusion and the like often occur to the cast-in-situ bored pile, so that engineering hidden troubles are caused; the construction process is complex, the construction time is long, and the labor input is large; the solid waste is large in quantity, and the environmental pollution is serious; the sediment at the bottom of the hole is not easy to be discharged, and the mud on the side of the pile left by the mud protective wall, thereby greatly reducing the counter force at the bottom of the cast-in-place pile and the friction force of the side wall, and reducing the bearing capacity of the pile foundation.
(2) Although the quality of the prestressed concrete pipe pile construction is well controlled, the prestressed concrete pipe pile construction needs to be prefabricated in a factory, the shearing resistance of the pile is poor, the prestressed concrete pipe pile construction is not suitable for being used as a foundation pit fender pile, the welding performance and the corrosion resistance of the prestressed concrete pipe pile are difficult to guarantee, and the prestressed concrete pipe pile construction is large in environmental pollution and high in noise due to the adoption of a diesel hammer and is not suitable for urban construction.
(3) The vibration cast-in-place pile and the rammed pile all belong to pile types with small bearing capacity, the cross-sectional area of the pile is small, the bearing capacity and the shearing resistance are small, and the pile is not suitable for foundation pit fender piles and main pile types of high-rise buildings.
(4) The manual hole digging pile is suitable for pile shapes with large diameter and the depth of the pile within 15 meters, and is limited in many areas due to potential safety hazards and difficulty in solving the problems of mud running and sand running.
In short, the above various pile foundations always have such or other problems in the aspects of pile foundation quality, influence on the surrounding environment and buildings, construction safety, engineering cost and the like. Generally speaking, precast tubular piles or square piles are convenient to construct, have little pollution to the environment and lower cost, the size of the diameter of a bored (rotary-excavated) cast-in-place pile is simple to adjust, the bearing capacity can be increased along with the increase of the diameter of the pile, but the cost is high, and the pollution of slurry and earth transportation to the environment is large. In recent years, the full-casing rotary excavating cast-in-place pile, the rubbing tube washing and grabbing cast-in-place pile and the like are introduced by foreign technologies, the problems of soil squeezing, mud pollution and the like are solved, the equipment is expensive, the construction cost is extremely high, earthwork must be transported outwards, the bearing capacity is not different from that of the common cast-in-place pile, and the comprehensive efficacy is not high.
In view of the above problems, it is necessary to improve them.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the static pressure pipe pile sinking device and the construction method which have the advantages of good pile foundation quality, small influence on the surrounding environment during construction, high-efficiency and safe construction and low construction cost and can recycle the pile tip.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: the static pressure pile sinking device with the pile tip capable of being recovered comprises an outer sleeve and a pile tip mechanism sleeved at the bottom of the outer sleeve; the pile tip mechanism comprises an inner pile tip, a sliding bearing block and a claw-shaped steel pipe; the sliding bearing block is assembled between an inner pile tip and the outer sleeve, and a claw-shaped steel pipe is sleeved in the inner pile tip; the bottom of the paw-shaped steel pipe is connected with a sliding bearing block, and the paw-shaped steel pipe is connected with a steel wire rope.
When the pile pressing operation is carried out, the outer sleeve (steel) pipe is held by the static pile pressing machine to press the pile downwards, the outer steel pipe transmits pressure to the sliding bearing block 4 through the pile shoe, so that the whole pile tip is driven to move downwards, and the soil body is squeezed open to sink into the outer sleeve (steel) pipe and the pile tip; after the pile tip reaches the designed elevation, the steel wire rope connecting the claw-shaped steel pipe is lifted to the limiting steel plate, the sliding bearing block is retracted inwards to a position smaller than the inner diameter of the steel pipe pile shoe, the steel wire rope is lifted continuously to lift the whole pile tip out of the pile hole, then the steel reinforcement cage is placed downwards to be poured with concrete (or sand and stone), and finally the steel pipe is pulled out to form the pile.
In a preferred scheme of the invention, the diameter of the inner pile tip is smaller than the inner diameter of the outer sleeve, and the inner pile tip is a hollow cone cast by pouring steel.
As a preferable scheme of the invention, the single side of the gap between the inner pile tip and the outer sleeve is 2-10 mm.
In a preferred embodiment of the present invention, the bottom of the steel pipe has a tapered inclined portion having an inclination angle corresponding to an inclination angle of the inner wall of the collet tip.
According to a preferable scheme of the invention, the middle part of the claw-shaped steel pipe is provided with a limiting step, correspondingly, the top of the inner pile tip is provided with a limiting iron plate matched with the limiting step, the limiting step is abutted against the limiting iron plate, and the limiting iron plate is connected with the inner pile tip through a punching bolt, so that the inner pile tip is convenient to disassemble, maintain and clean mud.
As a preferable scheme of the invention, a groove is formed on the side wall of the inner pile tip, and the sliding bearing block is rotationally matched in the groove and is connected with the paw-shaped steel pipe.
In a preferable scheme of the invention, the bottom of the outer sleeve is provided with a downward pile shoe; the inclination angle of the pile shoe is consistent with that of the sliding bearing block.
As a preferable scheme of the invention, a built-in pressurizing limiting step is formed at the position, close to the top of the inner pile tip, of the bottom pile shoe of the outer sleeve; the limiting step can be matched with a built-in hydraulic pile hammer to apply force to drive the outer sleeve when the outer sleeve cannot be pressed down by the static pile press.
In a preferable scheme of the invention, the clearance between the claw-shaped steel pipe and the inner pile tip is more than 2mm on one side.
In a preferable scheme of the invention, the surface of the inner pile tip is coated with an oxidation resistant material layer.
The static pressure pipe pile sinking device with the recyclable pile tip is not only limited to a bored pile, but also applicable to CFG (cement fly ash gravel) piles, immersed tube sand-stone piles, immersed tube embedded bored pile casings, immersed tube soil squeezing, drainage and reinforcement and the like.
A construction method of a static pressure pipe pile sinking device with a recoverable pile tip comprises the following steps:
firstly, construction preparation, namely fully preparing equipment, tools and objects required by construction, flatly compacting a construction site, cleaning sundries, removing soft soil and measuring the central position of a pile position;
secondly, pile foundation alignment; including the stake machine takes one's place and stake pipe centering alignment, wherein the stake machine takes one's place: after the static pile machine is installed and debugged, the static pile machine is driven to a pile position, so that the center of a pile pipe is basically aligned with a small wood pile marking the pile position on the ground, and the static pile machine is leveled;
step three, static pressure pile forming; pressing the assembled inner pile tip, outer sleeve, sliding bearing block and paw-shaped steel pipe into foundation soil under the action of static pile machine;
step four, pulling out the pile tip to form a hole; when the inner pile point reaches the designed elevation, the claw-shaped steel pipe is driven to move upwards through a crane on the static pressure pile machine through a steel wire rope, so that the sliding bearing block retracts, and when the claw-shaped steel pipe is lifted to the limiting steel plate, the claw-shaped steel pipe continues to be lifted up, so that the whole inner pile point is completely hung out of the hole.
Fifthly, hoisting a reinforcement cage in the outer sleeve;
sixthly, placing the guide pipe down and pouring concrete or filling materials such as sand and stone;
seventhly, pulling out the outer sleeve through high-frequency vibration or a hydraulic pile extractor;
and step eight, forming the pile.
The invention has the beneficial effects that:
1. the invention has simple structure and reasonable design, the acting force of the inner pile tip and the outer sleeve is perfectly transmitted by the sliding bearing block, the soil body is squeezed open under the pressure of the static pile machine, and the pile tip is completely taken out by a crane on the static pile machine after the elevation of the pile bottom is reached;
2. by adopting the technical scheme, the construction efficiency and quality are improved, the construction cost is reduced, the construction period is shortened, the pollution of outward transportation and disposal of slurry to the environment is completely reduced, the method is worthy of popularization and use, and the influence of the construction of the drilled pile on the surrounding environment is effectively reduced;
3. the full-length steel sleeve can avoid the problems of mud running, sand running and the like, basically ensures that most of foundation soil layers can be poured with concrete in dry operation, and can greatly improve the quality of pile body concrete by combining with vibration pipe drawing;
4. the pile toe is simple in structural design, the pile toe is reduced and recovered without a rigid force transfer part, energy is saved, environment is protected, the pile toe is suitable for being used in a wide place in a city, other equipment is the existing equipment, construction operation is very convenient, and no pollution is caused;
5. the inner pile tip has strong penetrating power, good integral structure, strong field construction performance and quick connection, can be better combined with a built-in hydraulic hammer for use, can also be combined with an excavated rock stratum of a rotary excavating pile machine for use, is suitable for the requirements of different projects and geological conditions, and greatly improves the construction utilization rate;
6. the bottom of the outer sleeve is provided with a downward pile shoe; the inclination angle of the pile shoe is consistent with that of the sliding bearing block; the bottom of the outer sleeve can be better connected with the sliding bearing block and the inner pile tip; the pile pressing device is of a structure inclined from top to bottom, and the inclination angle of the pile pressing device is between five and twenty degrees, so that the sliding bearing block can not move upwards due to too large pressure on the claw-shaped steel pipe when the pile is pressed, and the sliding bearing block can not push the outer steel pipe upwards when the sliding bearing block retracts;
7. the surface of the inner pile tip is coated with an anti-oxidation material layer, so that the inner pile tip is prevented from being buried underground for a long time to generate oxidation.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a state diagram illustrating the use of an embodiment of the present invention;
description of the drawings: the pile comprises a steel wire rope 1, an inner pile tip 2, an outer sleeve 3, a sliding bearing block 4, a paw-shaped steel pipe 5, a limiting iron plate 20, a pile shoe 30, an inclined part 50 and a limiting step 51.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present 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.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection can be mechanical connection or electric welding connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
as shown in fig. 1-2, the static pressure pile sinking device with a recoverable pile tip provided in this embodiment includes an outer sleeve 3, an inner pile tip 2 sleeved at the bottom of the outer sleeve 3, and a sliding bearing block 4 installed between the outer sleeve 3 and the inner pile tip 2; a claw-shaped steel pipe 5 is sleeved in the inner pile tip 2; the bottom of the claw-shaped steel pipe 5 is connected with a sliding bearing block 4, a steel wire rope 1 is connected on the claw-shaped steel pipe 5, during construction, the steel wire rope 1 is loosened, the claw-shaped steel pipe 5 presses the sliding bearing block out of a pile tip 2 through self weight, an outer sleeve 3 abuts against the upper portion of the sliding bearing block 4, a static pressure pile machine moves downwards by holding the outer sleeve 3, then the inner pile tip 2 is driven to move downwards synchronously, after a designed elevation is reached, the steel wire rope 1 connected with the claw-shaped steel pipe 5 is lifted up to a limiting steel plate 20, the sliding bearing block 4 retracts inwards to be smaller than the inner diameter of a steel pipe pile shoe, the steel wire rope is continuously lifted up to lift the whole pile tip out of a pile hole, then a steel reinforcement cage is placed for pouring concrete (sand stone can be poured.
The invention has simple structure and reasonable design, and is provided with the outer sleeve, the inner pile tip and the connecting piece; the sliding bearing block 4 is perfectly zoomed by the up-and-down movement of the paw-shaped steel pipe 5, so that the acting force of the inner pile tip and the outer sleeve is perfectly transferred and unhooked and recovered, the construction benefit of the static pressure immersed tube pile is improved, and the device also has the characteristics of convenience in installation, safety, reliability and the like.
Wherein, the diameter of the inner pile tip 2 is smaller than the inner diameter of the outer sleeve 3, and the inner pile tip 2 is a hollow cone cast by casting steel; the inner pile tip has strong penetrating power, good integral structure, strong site construction performance and quick connection, can better combine the inner pile tip and the outer sleeve together, is suitable for the requirements of different projects and geological conditions, and greatly improves the construction utilization rate.
The single side of the gap between the inner pile tip 2 and the outer sleeve 3 is 2-10 mm; specifically, in the embodiment, the single side of the gap between the inner pile tip 2 and the outer sleeve 3 is 5mm, and the outer sleeve 3 is a full-length steel sleeve; the full-length steel sleeve can avoid the problems of mud running, sand running and the like, basically ensures that most of foundation soil layers can be poured with concrete in a dry operation, and can greatly improve the quality of pile body concrete by combining with an oil pressure pipe drawing machine.
The bottom of the claw-shaped steel pipe 5 is an inclined part 50, and the inclined angle of the inclined part 50 is consistent with the inclined angle of the inner wall of the inner pile tip 2; the bottom of the outer sleeve can be better connected with the sliding bearing block 4 and the inner pile tip; the structure is inclined from top to bottom, the inclination angle is between five and twenty degrees, and the bearing can be better stressed with the ground.
By adopting the technical scheme, the construction efficiency and quality are improved, the construction cost is reduced, the construction period is shortened, the method is worthy of popularization and application, the problems of slurry discharge or waste soil outward transportation in cast-in-place pile construction are greatly reduced, and the influence on the surrounding environment is small.
The middle part of the claw-shaped steel pipe 5 is provided with a limiting step, correspondingly, the top of the inner pile tip 2 is provided with a limiting iron plate 20 matched with the limiting step, the limiting step 51 is abutted against the limiting iron plate 20, the limiting iron plate 20 is connected with the inner pile tip 2 through a punching bolt, and the claw-shaped steel pipe is convenient to detach, maintain and clean mud.
A crane on the static pressure pile machine drives a steel wire rope to move upwards, and then drives the claw-shaped steel pipe 5 to move upwards, the sliding bearing block 4 at the bottom of the claw-shaped steel pipe 5 retracts along the groove 21, the claw-shaped steel pipe 5 moves upwards along the inner pile tip 2, when the claw-shaped steel pipe moves to the top of the inner pile tip 2, the top of the limiting step 51 is abutted to the bottom of the limiting part 20, and the inner pile tip can be pulled up.
A groove 21 is formed in the side wall of the inner pile tip 2, and the sliding bearing block 4 is rotatably matched in the groove 21 and connected with the claw-shaped steel pipe 5; because the contact surface of the claw-shaped steel pipe 5 and the inner wall of the inner pile tip is well matched, the sliding bearing block 4 cannot sway left and right or jump up and down.
The bottom of the outer sleeve 3 is provided with a downward pile shoe 30; the inclination angle of the pile shoe 30 is consistent with that of the sliding bearing block 4, so that the pile shoe 30 is in full-section contact with the sliding bearing block 4, the pressure of soil in the pile pressing process is not more than that of the claw-shaped steel pipe 5 to slide upwards, and when the sliding bearing block is retracted, the friction force between the pile shoe 30 and the outer sleeve is reduced.
The single side of the gap between the claw-shaped steel pipe 5 and the inner pile tip 2 is more than 2 mm; the friction force when the inner pile tip 2 is pulled out is reduced, and the working efficiency is improved.
The surface of the inner pile tip 2 is coated with an anti-oxidation material layer, so that the inner pile tip is prevented from being buried underground for a long time to generate oxidation.
A construction method of the pile sinking tube of static pressure of recoverable pile tip, including pore-forming and pouring two-part process, the pore-forming process holds and presses the outer thimble 3 with the static pressure pile machine, the outer thimble 3 sinks and squeezes the soil pore-forming apparatus along with the inner pile tip, the clearance unilateral between outer thimble 3 and the inner pile tip 2 as squeezing the soil main apparatus is 2-10mm, the thimble all adopts the steel sleeve of overall length; the full-length steel sleeve can avoid the problems of mud running, sand running and the like, basically ensures that most of foundation soil layers can be poured with concrete in dry operation, and can greatly improve the quality of pile body concrete by combining with vibration pipe drawing.
The static pressure pipe pile sinking device with the recyclable pile tip is not only limited to a bored pile, but also applicable to CFG (cement fly ash gravel) piles, immersed tube sand-stone piles, immersed tube embedded bored pile casings, immersed tube soil squeezing, drainage and reinforcement and the like.
The inner pile tip 2 and the outer sleeve 3 sink into the foundation soil under the pressure of the static pressure pile machine, as shown in fig. 1, the steps of the hole forming and the concrete pile pouring construction are as follows:
firstly, construction preparation, namely fully preparing equipment, tools and objects required by construction, flatly compacting a construction site, cleaning sundries, removing soft soil and measuring the central position of a pile position;
secondly, pile foundation alignment; including the stake machine takes one's place and stake pipe centering alignment, wherein the stake machine takes one's place: after the static pile machine is installed and debugged, the static pile machine is driven to a pile position, so that the center of a pile pipe is basically aligned with a small wood pile marking the pile position on the ground, and the static pile machine is leveled;
step three, static pressure pile forming; the assembled inner pile tip 2, outer sleeve 3, sliding bearing block 4 and claw-shaped steel pipe 5 are driven into foundation soil by the pressure of the static pile machine acting on the outer sleeve 3;
step four, lifting the steel wire rope 1 by a crane on the static pressure pile machine to drive the claw-shaped steel pipe 5 to the position of the limiting steel plate 20, and continuously lifting the steel wire rope to drive the whole pile tip to be lifted out of the outer sleeve to form a hole;
fifthly, hoisting a reinforcement cage in the outer sleeve 3;
step six, pouring concrete
Seventhly, the outer sleeve 3 is pulled out through high-frequency vibration or a hydraulic pile extractor;
and step eight, forming the pile.
Example 2:
the construction method comprises the following steps of for projects with higher requirements on the concrete protective layer, hole forming and concrete pile pouring:
firstly, construction preparation, namely fully preparing equipment, tools and objects required by construction, flatly compacting a construction site, cleaning sundries, removing soft soil and measuring the central position of a pile position;
secondly, pile foundation alignment; including the stake machine takes one's place and stake pipe centering alignment, wherein the stake machine takes one's place: after the static pile machine is installed and debugged, the static pile machine is driven to a pile position, so that the center of a pile pipe is basically aligned with a small wood pile marking the pile position on the ground, and the static pile machine is leveled;
step three, static pressure pile forming; the assembled inner pile tip 2, outer sleeve 3, sliding bearing block 4 and claw-shaped steel pipe 5 are driven into foundation soil by the pressure of the static pile machine acting on the outer sleeve 3;
step four, lifting the steel wire rope 1 by a crane on the static pressure pile machine to drive the claw-shaped steel pipe 5 to the position of the limiting steel plate 20, and continuously lifting the steel wire rope to drive the whole pile tip to be lifted out of the outer sleeve to form a hole;
step five, pouring concrete;
sixthly, the outer sleeve 3 is pulled out through high-frequency vibration or a hydraulic pile extractor;
step seven, vibrating and pressing the reinforcement cage into the concrete pile through high-frequency vibration;
and step eight, forming the pile.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the reference numerals in the figures are used more here: the terms steel wire rope 1, inner pile tip 2, outer sleeve 3, sliding bearing block 4, claw-shaped steel tube 5, limiting iron plate 20, pile shoe 30, inclined part 50, limiting step 51, etc., but do not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (10)
1. Recoverable static pressure immersed tube stake device of stake point, its characterized in that: comprises an outer sleeve (3) and a pile tip mechanism sleeved at the bottom of the outer sleeve (3); the pile tip mechanism comprises an inner pile tip (2), a sliding bearing block (4) and a paw-shaped steel pipe (5); wherein, the sliding bearing block (4) is assembled between the inner pile tip (2) and the outer sleeve (3), and a claw-shaped steel pipe (5) is sleeved in the inner pile tip (2); the bottom of the claw-shaped steel pipe (5) is connected with a sliding bearing block (4), and the claw-shaped steel pipe (5) is connected with a steel wire rope (1).
2. The static pressure pile sinking device with recoverable pile tip according to claim 1, characterized in that: the diameter of the inner pile tip (2) is smaller than the inner diameter of the outer sleeve (3), and the inner pile tip (2) is a hollow cone cast by pouring steel.
3. The static pressure pile sinking device with the recoverable pile tip as claimed in claim 2, wherein: the single side of the gap between the inner pile tip (2) and the outer sleeve (3) is 2-10 mm.
4. The static pressure pile sinking device with the recoverable pile tip as claimed in claim 3, wherein: the bottom of the claw-shaped steel pipe (5) is a conical inclined part (50), and the inclined angle of the inclined part (50) is consistent with the inclined angle of the inner wall of the inner pile tip (2).
5. The static pressure pile sinking device with the recoverable pile tip as claimed in claim 4, wherein: the middle part of the claw-shaped steel pipe (5) is provided with a limiting step (51), correspondingly, the top of the inner pile tip (2) is provided with a limiting iron plate (20) matched with the limiting step (51), and the limiting step (51) is abutted to the limiting iron plate (20).
6. The static pressure pile sinking device with the recoverable pile tip as claimed in claim 5, wherein: the side wall of the inner pile tip (2) is provided with a groove (21), and the sliding bearing block (4) is rotationally matched in the groove (21) and is connected with the claw-shaped steel pipe (5).
7. The static pressure pile-sinking device with recoverable pile tip according to claim 1, 2 or 3, is characterized in that: a pile shoe (30) with a thickened thickness is formed at the bottom of the outer sleeve (3); the inclination angle of the pile shoe (30) is consistent with the inclination angle of the sliding bearing block (4).
8. The static pressure pile sinking device with the recoverable pile tip as claimed in claim 7, wherein: and a built-in pressurizing limiting step (51) is formed at the position, close to the top of the inner pile tip (2), of the bottom pile shoe (30) of the outer sleeve (3).
9. The static pressure pile sinking device with the recoverable pile tip as claimed in claim 8, wherein: the single side of the gap between the claw-shaped steel pipe (5) and the inner pile tip (2) is more than 2 mm.
10. A construction method of the static pressure pile-sinking apparatus with a recoverable pile tip according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:
firstly, construction preparation, namely fully preparing equipment, tools and objects required by construction, flatly compacting a construction site, cleaning sundries, removing soft soil and measuring the central position of a pile position;
secondly, pile foundation alignment; including the stake machine takes one's place and stake pipe centering alignment, wherein the stake machine takes one's place: after the static pile machine is installed and debugged, the static pile machine is driven to a pile position, so that the center of a pile pipe is basically aligned with a small wood pile marking the pile position on the ground, and the static pile machine is leveled;
step three, static pressure pile forming; the assembled inner pile tip (2), the outer sleeve (3), the sliding bearing block (4) and the claw-shaped steel pipe (5) are driven into foundation soil through the pressure of a static pile machine acting on the outer sleeve (3);
step four, lifting the steel wire rope (1) through a crane on the static pressure pile machine to drive the claw-shaped steel pipe (5) to the position of the limiting steel plate (20), and continuously lifting the steel wire rope (1) to drive the whole pile tip to be lifted out of the outer sleeve to form a hole;
fifthly, hoisting a reinforcement cage in the outer sleeve (3);
step six, pouring concrete or sand stone filler;
seventhly, the outer sleeve (3) is pulled out through high-frequency vibration or a hydraulic pile extractor;
and step eight, forming the pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011060282.6A CN112343045A (en) | 2020-09-30 | 2020-09-30 | Static pressure pipe pile sinking device with recyclable pile tip and construction method |
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| CN202011060282.6A CN112343045A (en) | 2020-09-30 | 2020-09-30 | Static pressure pipe pile sinking device with recyclable pile tip and construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114197472A (en) * | 2021-12-09 | 2022-03-18 | 中煤第三建设（集团）有限责任公司 | Vibration auxiliary device for small-diameter tree root pile and using method thereof |
| CN117071556A (en) * | 2023-10-13 | 2023-11-17 | 兴化市杰俊机械有限公司 | Ocean pile driving ship |
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2020
- 2020-09-30 CN CN202011060282.6A patent/CN112343045A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114197472A (en) * | 2021-12-09 | 2022-03-18 | 中煤第三建设（集团）有限责任公司 | Vibration auxiliary device for small-diameter tree root pile and using method thereof |
| CN117071556A (en) * | 2023-10-13 | 2023-11-17 | 兴化市杰俊机械有限公司 | Ocean pile driving ship |
| CN117071556B (en) * | 2023-10-13 | 2024-02-09 | 兴化市杰俊机械有限公司 | Ocean pile driving ship |
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