Static pressure pipe pile device with recyclable pile tip and construction method

Abstract

The present invention relates to a static pressure pipe pile device with a recyclable pile tip and a construction method, comprising an outer sleeve, an inner pile tip sleeved on the bottom of the outer sleeve, and the inner pile tip comprising a hollow cone pile tip, a sliding pressure block and a sliding conical steel pipe. When pressing the pile, the static pressure pile driver holds the outer steel pipe and presses the pile downward, and the outer steel pipe transmits the pressure to the sliding pressure block through the pile shoe, thereby driving the entire pile tip to move downward, squeezing the soil and sinking into the outer steel pipe and the pile tip; the present invention has a simple structure and a reasonable design, and an outer sleeve, an inner pile tip and a connecting piece are provided; the forces of the inner pile tip, the sliding pressure block and the outer sleeve are perfectly transmitted through the sliding conical steel pipe, and the pile tip recovery greatly reduces the construction cost of the soil-squeezing cast-in-place pile, which not only improves the bearing capacity of the pile foundation, but also reduces the pollution of mud to the environment.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a static pressure pipe pile device with recyclable pile tip and a construction method. Background Art

[0002] At present, there are dozens of pile foundations used in various projects. According to different construction techniques, the main pile types in my country are bored piles, vibrating piles, rammed piles, manually dug piles, prestressed pipe piles, and various flexible and semi-flexible piles for soft foundation treatment (such as cement mixing piles and powder injection piles, high-pressure rotary jet piles, sandstone piles or crushed stone piles). As for the main pile types currently used, there are the following problems:

[0003] (1) Bored piles often have quality problems such as broken piles, neck shrinkage, segregation and mud inclusions, which cause engineering hazards; the construction process is complex, the construction time is long, and the labor input is large; the amount of solid waste is large, and the environmental pollution is serious; the sediment at the bottom of the hole is difficult to discharge, and the mud skin on the pile side left by the mud wall greatly reduces the bottom reaction force and side wall friction of the bored pile, reducing the bearing capacity of the pile foundation.

[0004] (2) Although the quality of prestressed concrete pipe pile construction is well controlled, it must be prefabricated in the factory. The piles have poor shear resistance and are not suitable for foundation pit retaining piles. As pull-out piles, the welding performance and corrosion resistance are difficult to guarantee. The use of diesel hammers causes great environmental pollution and noise, making them unsuitable for construction in urban areas.

[0005] (3) Both vibrating cast-in-place piles and rammed-expanded piles are pile types with relatively small bearing capacity. The cross-sectional area of ​​the piles is small, and the bearing capacity and shear resistance are relatively small. They are not suitable as the main pile types for foundation pit retaining piles and high-rise buildings.

[0006] (4) Bored piles are suitable for piles with large diameters and a depth of less than 15 meters. However, they are restricted in many areas due to potential safety hazards and the difficulty in solving mud and sand flow problems.

[0007] In short, the above types of pile foundations always have problems in terms of pile foundation quality, impact on the surrounding environment and buildings, construction safety and project cost. Generally speaking, prefabricated pipe piles or square piles are easy to construct, have less pollution to the environment, and are low in cost. The diameter of bored (rotary) cast-in-place piles is easy to adjust, and the bearing capacity can be increased with the increase of the pile diameter, but the cost is high, and the transportation of mud and earthwork causes great pollution to the environment. In recent years, through the introduction of foreign technology, full-tube rotary drilling cast-in-place piles and rubbing pipe flushing soil-grabbing cast-in-place piles have been introduced. Although the problems of soil squeezing and mud pollution have been solved, these equipment are expensive, the construction cost is extremely high, and the earthwork must be transported out. The bearing capacity is no different from that of ordinary cast-in-place piles, and the overall effectiveness is not high.

[0008] In view of the above problems, it is necessary to improve them. Summary of the invention

[0009] The present invention aims to overcome the defects in the above-mentioned prior art and provide a static pressure pipe pile device and a construction method with good pile foundation quality, small impact on the surrounding environment during construction, efficient and safe construction and low engineering cost, and with recyclable pile tip.

[0010] In order to achieve the above purpose, the technical solution adopted by the present invention is: a static pressure pipe pile device with a recyclable pile tip, including an outer sleeve, a pile tip mechanism sleeved on the bottom of the outer sleeve; the pile tip mechanism includes an inner pile tip, a sliding pressure block and a claw-shaped steel pipe; wherein the sliding pressure block is assembled between the inner pile tip and the outer sleeve, and the claw-shaped steel pipe is sleeved inside the inner pile tip; the sliding pressure block is connected to the bottom of the claw-shaped steel pipe, and a steel wire rope is connected to the claw-shaped steel pipe.

[0011] During the specific operation of pile driving, the static pile driver holds the outer sleeve (steel) pipe and presses the pile downward. The outer steel pipe transmits the pressure to the sliding pressure block 4 through the pile shoe, thereby driving the entire pile tip to move downward, squeezing the soil and sinking into the outer sleeve (steel) pipe and the pile tip; when the pile tip reaches the designed elevation, the steel wire rope connected to the claw-shaped steel pipe is pulled up to the limiting steel plate, so that the sliding pressure block is retracted inward to a size smaller than the inner diameter of the steel pipe pile shoe, and the steel wire rope is continued to be pulled up to make the entire pile tip out of the pile hole, and then the steel cage is lowered to pour concrete (sand and gravel can also be poured), and finally the steel pipe is pulled out to form a pile.

[0012] As a preferred solution of the present invention, the diameter of the inner pile tip is smaller than the inner diameter of the outer casing, and the inner pile tip is a hollow cone cast by pouring steel.

[0013] As a preferred solution of the present invention, the gap between the inner pile tip and the outer sleeve is 2 to 10 mm on one side.

[0014] As a preferred solution of the present invention, the bottom of the claw-shaped steel pipe is a conical inclined portion, and the inclination angle of the inclined portion is consistent with the inclination angle of the inner wall of the inner pile tip.

[0015] As a preferred solution of the present invention, a limiting step is formed in the middle of the claw-shaped steel pipe, and correspondingly, a limiting iron plate adapted to the limiting step is arranged on the top of the inner pile tip, the limiting step is abutted against the limiting iron plate, and the limiting iron plate and the inner pile tip are connected with punched bolts to facilitate disassembly, maintenance and mud cleaning.

[0016] As a preferred solution of the present invention, a groove is formed on the side wall of the inner pile tip, and the sliding pressure-bearing block is transferred into the groove and connected to the claw-shaped steel pipe.

[0017] As a preferred solution of the present invention, the bottom of the outer sleeve is a downward pile shoe; the inclination angle of the pile shoe is consistent with the inclination angle of the sliding pressure block.

[0018] As a preferred solution of the present invention, a built-in pressure limiting step is formed at the bottom pile shoe of the outer casing near the top of the inner pile tip; the limiting step can cooperate with the built-in hydraulic hammer pile hammer to increase the force to drive the outer casing when the static pile driver cannot press down the outer casing.

[0019] As a preferred solution of the present invention, the gap between the claw-shaped steel pipe and the inner pile tip is >2 mm on one side.

[0020] As a preferred solution of the present invention, the surface of the inner pile tip is coated with an anti-oxidation material layer.

[0021] The static pressure pipe pile device with recyclable pile tip in the present invention is not limited to bored cast-in-place piles, but is also applicable to CFG piles (cement fly ash gravel piles), pipe sinking sand piles, pipe sinking sand and gravel piles, pipe sinking buried bored pile casings and pipe sinking soil squeezing drainage reinforcement, etc.

[0022] A construction method of a static pressure pipe pile device with a recyclable pile tip, comprising the following steps:

[0023] Step 1: Construction preparation: fully prepare the equipment, tools and objects needed for construction, level and compact the construction site, clean up debris, remove soft soil, and measure and mark the center position of the pile;

[0024] Step 2: Pile foundation alignment, including positioning of the pile driver and centering and straightening of the pile pipe. The pile driver is positioned as follows: after the static pile driver is installed and debugged, it goes to the pile position, aligns the center of the pile pipe with the small wooden pile marking the pile position on the ground, and adjusts the static pile driver;

[0025] Step 3: static pressure piling: the assembled inner pile tip, outer sleeve, sliding pressure block and claw-shaped steel pipe are pressed into the foundation soil by the pressure of the static pressure pile driver on the outer sleeve;

[0026] Step 4: Pull out the pile tip to form a hole; when the inner pile tip reaches the designed elevation, the crane on the static pressure pile driver drives the claw-shaped steel pipe upward through the wire rope, thereby retracting the sliding pressure block. When the claw-shaped steel pipe is lifted up to the limit steel plate, continue to lift the claw-shaped steel pipe upward to lift the entire inner pile tip out of the hole.

[0027] Step 5: Hang the steel cage in the outer casing;

[0028] Step 6: Lower the conduit and pour concrete, or pour filling materials such as sand and gravel;

[0029] Step 7: Pull out the outer casing by high-frequency vibration or hydraulic pile puller;

[0030] Step 8: Make piles.

[0031] The beneficial effects of the present invention are:

[0032] 1. The invention has a simple structure and reasonable design. The force between the inner pile tip and the outer sleeve is perfectly transmitted by the sliding pressure block, so that the soil is squeezed open under the pressure of the static pile driver. After reaching the pile bottom elevation, the pile tip is completely taken out by the crane on the static pile driver. It also has the characteristics of easy installation, safety and reliability.

[0033] 2. The present invention adopts the above technical solution, which improves the construction efficiency and quality, reduces the construction cost, shortens the construction period, and completely reduces the pollution to the environment caused by the transportation and disposal of mud. It is worthy of promotion and use, and effectively reduces the impact of bored pile construction on the surrounding environment;

[0034] 3. The use of full-length steel casing can avoid problems such as mud and sand flow, and can basically ensure that most of the foundation soil layers can be poured with dry concrete. Combined with vibration pipe pulling, the quality of pile concrete can be greatly improved;

[0035] 4. The pile tip structure is simple in design, and no rigid force transmission parts are needed to shrink and recycle the pile tip. It is energy-saving and environmentally friendly, and is suitable for use in open areas in cities. Other equipment is existing equipment, and the construction operation is very convenient and pollution-free.

[0036] 5. The inner pile tip of the present invention has strong penetration, good overall structure, strong on-site construction performance, fast connection, and can better combine the inner pile tip with the built-in hydraulic hammer for use, and can also be used in combination with a rotary pile driver to excavate rock formations. It is suitable for the needs of different engineering and geological conditions, and greatly improves the construction utilization rate;

[0037] 6. The bottom of the outer sleeve of the present invention is a downward pile shoe; the inclination angle of the pile shoe is consistent with the inclination angle of the sliding pressure block; the bottom of the outer sleeve can be better connected with the sliding pressure block and the inner pile tip; it is a top-down inclined structure, and its inclination angle is between 5 and 20 degrees, so that the sliding pressure block will not move upward due to too much pressure on the claw-shaped steel pipe when pressing the pile, and it can also prevent the sliding pressure block from pushing the outer steel pipe upward when retracting;

[0038] 7. An anti-oxidation material layer is coated on the surface of the inner pile tip to prevent the inner pile tip from being oxidized when buried underground for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0040] Figure 2 is a usage state diagram of an embodiment of the present invention;

[0041] Description of the drawings: steel wire rope 1, inner pile tip 2, outer sleeve 3, sliding pressure block 4, claw-shaped steel pipe 5, limiting iron plate 20, pile shoe 30, inclined part 50, limiting step 51. DETAILED DESCRIPTION

[0042] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electric welding connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Embodiment 1:

[0045] like Figure 1-2 As shown, the present embodiment provides a static pressure pipe pile device with a recyclable pile tip, comprising an outer sleeve 3, an inner pile tip 2 sleeved at the bottom of the outer sleeve 3, a sliding pressure block 4 installed between the outer sleeve 3 and the inner pile tip 2; a claw-shaped steel pipe 5 sleeved inside the inner pile tip 2; the bottom of the claw-shaped steel pipe 5 is connected to the sliding pressure block 4, and the claw-shaped steel pipe 5 is connected to the steel wire rope 1. During construction, the steel wire rope 1 is loosened so that the claw-shaped steel pipe 5 presses the sliding pressure block out of the pile tip 2 by its own weight. The outer sleeve 3 contacts the upper part of the sliding pressure block 4, and the static pressure pile driver moves downward by holding the outer sleeve 3, thereby driving the inner pile tip 2 to move downward synchronously. After reaching the designed elevation, the steel wire rope 1 connected to the claw-shaped steel pipe 5 is pulled up to the limit steel plate 20, so that the sliding pressure block 4 is retracted inward to a smaller diameter than the inner diameter of the steel pipe pile shoe, and the steel wire rope is continuously pulled up to make the entire pile tip out of the pile hole, and then the steel cage is lowered to pour concrete (sand and gravel can also be poured), and finally the steel pipe is pulled out to form a pile.

[0046] The invention has a simple structure and a reasonable design. By arranging an outer sleeve, an inner pile tip and a connecting piece, the sliding pressure-bearing block 4 is perfectly scaled by moving the claw-shaped steel pipe 5 up and down, so that the force of the inner pile tip and the outer sleeve can be perfectly transmitted and unhooked and recovered, thereby improving the construction efficiency of the static pressure sinking pipe pile. At the same time, it also has the characteristics of easy installation, safety and reliability.

[0047] Among them, the diameter of the inner pile tip 2 is smaller than the inner diameter of the outer casing 3, and the inner pile tip 2 is a hollow cone cast by cast steel; the inner pile tip has strong penetration, good overall structure, strong on-site construction performance, fast connection, and can better combine the inner pile tip with the outer casing, which is suitable for the needs of different engineering and geological conditions, and greatly improves the construction utilization rate.

[0048] The gap between the inner pile tip 2 and the outer sleeve 3 is 2 to 10 mm on one side; specifically, in the present embodiment, the gap between the inner pile tip 2 and the outer sleeve 3 is 5 mm on one side, and the outer sleeve 3 adopts a full-length steel sleeve; the use of a full-length steel sleeve can avoid problems such as mud flow and sand flow, and can basically ensure that most of the foundation soil layers can be poured with dry concrete, and the quality of the pile body concrete can be greatly improved by combining with a hydraulic pipe pulling machine.

[0049] The bottom of the claw-shaped steel pipe 5 is an inclined portion 50, and the inclination angle of the inclined portion 50 is consistent with the inclination angle of the inner wall of the inner pile tip 2; the bottom of the outer sleeve can be better connected with the sliding pressure block 4 and the inner pile tip; it is a top-down inclined structure, and its inclination angle is between five and twenty degrees, which can better bear force between the ground.

[0050] The present invention adopts the above technical solution, improves construction efficiency and quality, reduces construction costs, shortens construction period, is worthy of popularization and use, greatly reduces the problem of mud discharge or waste soil transportation in bored pile construction, and has little impact on the surrounding environment.

[0051] A limiting step is formed in the middle of the claw-shaped steel pipe 5. Correspondingly, a limiting iron plate 20 adapted to the limiting step is arranged on the top of the inner pile tip 2. The limiting step 51 abuts against the limiting iron plate 20. The limiting iron plate 20 and the inner pile tip 2 are connected by punched bolts, which is convenient for disassembly, maintenance and mud cleaning.

[0052] The crane on the static pile driver drives the wire rope to move upward, thereby driving the claw-shaped steel pipe 5 to move upward, the sliding pressure-bearing block 4 at the bottom of the claw-shaped steel pipe 5 retracts along the groove 21, and the claw-shaped steel pipe 5 moves upward along the inside of the inner pile tip 2. When it moves to the top of the inner pile tip 2, the top of the limiting step 51 abuts against the bottom of the limiting part 20, so that the inner pile tip can be pulled up.

[0053] A groove 21 is formed on the side wall of the inner pile tip 2, and the sliding pressure block 4 is transferred into the groove 21 and connected to the claw-shaped steel pipe 5; since the contact surface of the claw-shaped steel pipe 5 and the inner wall of the inner pile tip is well matched, the sliding pressure block 4 will not shake left and right or jump up and down.

[0054] The bottom of the outer sleeve 3 is a downward-pointing pile shoe 30; the inclination angle of the pile shoe 30 is consistent with the inclination angle of the sliding pressure block 4, so that the pile shoe 30 is in full-section contact with the sliding pressure block 4. During the pile pressing process, the pressure of the soil will not cause the claw-shaped steel pipe 5 to slide upward, and when the sliding pressure block is retracted, the friction with the outer sleeve is reduced.

[0055] The gap between the claw-shaped steel pipe 5 and the inner pile tip 2 is greater than 2 mm on one side, which reduces the friction when the inner pile tip 2 is pulled out and improves the work efficiency.

[0056] The surface of the inner pile tip 2 is coated with an anti-oxidation material layer to prevent the inner pile tip from being oxidized when buried underground for a long time.

[0057] A construction method for a static pressure pile sinking pipe with a recyclable pile tip, comprising two processes of hole forming and pouring. The hole forming process is a static pressure pile driver holding and pressing an outer casing 3, and the outer casing 3 follows the inner pile tip to sink and squeeze the soil to form a hole. The gap between the inner pile tip 2 and the outer casing 3, which are the main soil squeezing equipment, is 2-10 mm on one side, and the casings are all full-length steel casings. The full-length steel casings can avoid the problems of mud flow, sand flow, etc., and can basically ensure that most foundation soil layers can be poured with dry concrete. Combined with vibration pipe pulling, the quality of pile body concrete can be greatly improved.

[0058] The static pressure pipe pile device with recyclable pile tip in the present invention is not limited to bored cast-in-place piles, but is also applicable to CFG piles (cement fly ash gravel piles), pipe sinking sand piles, pipe sinking sand and gravel piles, pipe sinking buried bored pile casings and pipe sinking soil squeezing drainage reinforcement, etc.

[0059] The inner pile tip 2 and the outer sleeve 3 sink into the foundation soil under the pressure of the static pile driver. Figure 1 As shown, the construction steps of drilling and pouring concrete piles are as follows:

[0060] Step 1: Construction preparation: fully prepare the equipment, tools and objects needed for construction, level and compact the construction site, clean up debris, remove soft soil, and measure and mark the center position of the pile;

[0061] Step 2: Pile foundation alignment, including positioning of the pile driver and centering and straightening of the pile pipe. The pile driver is positioned as follows: after the static pile driver is installed and debugged, it goes to the pile position, aligns the center of the pile pipe with the small wooden pile marking the pile position on the ground, and adjusts the static pile driver;

[0062] Step 3, static pressure pile formation; the assembled inner pile tip 2, outer sleeve 3, sliding pressure block 4 and claw-shaped steel pipe 5 are driven into the foundation soil by the pressure of the static pressure pile driver on the outer sleeve 3;

[0063] Step 4: Use the crane on the static pressure pile driver to lift the steel wire rope 1 to drive the claw-shaped steel pipe 5 to the limit steel plate 20, and continue to lift the steel wire rope to drive the entire pile tip to be lifted out of the outer casing to form a hole;

[0064] Step 5: Hang the steel cage in the outer casing 3;

[0065] Step 6: Pour concrete

[0066] Step 7: Pull out the outer casing 3 by high-frequency vibration or hydraulic pile pulling machine;

[0067] Step 8: Make piles.

[0068] Embodiment 2:

[0069] For projects with high requirements for concrete cover, the construction steps for drilling and concrete pile pouring are as follows:

[0070] Step 1: Construction preparation: fully prepare the equipment, tools and objects needed for construction, level and compact the construction site, clean up debris, remove soft soil, and measure and mark the center position of the pile;

[0071] Step 2: Pile foundation alignment, including positioning of the pile driver and centering and straightening of the pile pipe. The pile driver is positioned as follows: after the static pile driver is installed and debugged, it goes to the pile position, aligns the center of the pile pipe with the small wooden pile marking the pile position on the ground, and adjusts the static pile driver;

[0072] Step 3, static pressure pile formation; the assembled inner pile tip 2, outer sleeve 3, sliding pressure block 4 and claw-shaped steel pipe 5 are driven into the foundation soil by the pressure of the static pressure pile driver on the outer sleeve 3;

[0073] Step 4: Use the crane on the static pressure pile driver to lift the steel wire rope 1 to drive the claw-shaped steel pipe 5 to the limit steel plate 20, and continue to lift the steel wire rope to drive the entire pile tip to be lifted out of the outer casing to form a hole;

[0074] Step 5: pouring concrete;

[0075] Step 6: Pull out the outer casing 3 by high-frequency vibration or hydraulic pile pulling machine;

[0076] Step 7: Vibrate and press the steel cage into the concrete pile through high-frequency vibration;

[0077] Step 8: Make piles.

[0078] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0079] Although the following terms are used more frequently in this paper: wire rope 1, inner pile tip 2, outer sleeve 3, sliding pressure block 4, claw-shaped steel pipe 5, limit iron plate 20, pile shoe 30, inclined portion 50, limit step 51, etc., the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A statically-pressured pipe pile device with a recyclable pile tip, characterized in that: The invention comprises an outer sleeve (3), a pile tip mechanism sleeved on the bottom of the outer sleeve (3); the pile tip mechanism comprises an inner pile tip (2), a sliding pressure-bearing block (4) and a claw-shaped steel pipe (5); wherein the sliding pressure-bearing block (4) is assembled between the inner pile tip (2) and the outer sleeve (3), and the inner pile tip (2) is sleeved with the claw-shaped steel pipe (5); the bottom of the claw-shaped steel pipe (5) is connected to the sliding pressure-bearing block (4), and the claw-shaped steel pipe (5) is connected to a steel wire rope (1); the bottom of the claw-shaped steel pipe (5) is a conical inclined portion (50), and the inclination angle of the inclined portion (50) is equal to the inclination angle of the inner wall of the inner pile tip (2). The inner pile tip (2) is provided with a limit step (51) in the middle of the claw-shaped steel pipe (5), and correspondingly, a limit iron plate (20) matching the limit step (51) is arranged on the top of the inner pile tip (2), and the limit step (51) abuts against the limit iron plate (20); a groove (21) is formed on the side wall of the inner pile tip (2), and the sliding pressure block (4) is transferred into the groove (21) and connected to the claw-shaped steel pipe (5); 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 pressure block (4).

2. The static pressure pipe sinking pile device with recyclable pile tip according to claim 1 is 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 pipe pile device with recyclable pile tip according to claim 2 is characterized in that: The gap between the inner pile tip (2) and the outer sleeve (3) is 2 to 10 mm on one side.

4. The static pressure pipe pile device with recyclable pile tip according to claim 1 is characterized in that: A built-in pressure limiting step is formed on the bottom pile shoe (30) of the outer sleeve (3) near the top of the inner pile tip (2).

5. The static pressure pipe sinking pile device with recyclable pile tip according to claim 1 is characterized in that: The gap between the claw-shaped steel pipe (5) and the inner pile tip (2) is greater than 2 mm on one side.

6. A construction method for a statically-pressured pipe pile device with a recyclable pile tip as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: Construction preparation: fully prepare the equipment and tools needed for construction, level and compact the construction site, clean up debris, remove soft soil, and measure the center position of the pile; Step 2: Pile foundation alignment, including positioning of the pile driver and centering and straightening of the pile pipe. The pile driver is positioned as follows: after the static pile driver is installed and debugged, it goes to the pile position, aligns the center of the pile pipe with the small wooden pile marking the pile position on the ground, and adjusts the static pile driver; Step 3: static pressure piling; the assembled inner pile tip (2), outer sleeve (3), sliding pressure block (4) and claw-shaped steel pipe (5) are driven into the foundation soil by the pressure of the static pressure pile driver on the outer sleeve (3); Step 4: Use the crane on the static pressure pile driver to lift the steel wire rope (1) to drive the claw-shaped steel pipe (5) to the limit iron plate (20), and continue to lift the steel wire rope (1) to drive the entire pile tip to be lifted out of the outer casing to form a hole; Step 5: Hanging a steel cage in the outer casing (3); Step 6: pouring concrete or sand and gravel filling material; Step 7: Pull out the outer sleeve (3) by high-frequency vibration or hydraulic pile pulling machine; Step 8: Make piles.

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