Helical pile with wing and construction method

Abstract

The application provides a winged spiral sinking pipe pile and a construction method, which comprises at least one sleeve pipe, the sleeve pipe is sleeved with a spiral wing, the sleeve pipe and the spiral wing are connected through an axial insertion structure to form a through connection avoiding position assembly, the sleeve pipe and the spiral wing are connected through a rotating clamping structure to form a disassembly and assembly cooperation, the bottom end of the lowest sleeve pipe is sleeved with a pile tip, the sleeve pipe and the pile tip are connected through a rotating clamping structure to form a disassembly and assembly cooperation, a steel reinforcement cage is arranged in the sleeve pipe, the pile tip and the sleeve pipe are filled with concrete, the concrete covers the steel reinforcement cage, and the concrete is solidified to bond the pile tip and the spiral wing. The application is convenient for the operation mode of drilling the whole pile into the foundation and pulling out the whole pipe, simplifies the operation difficulty, and significantly improves the work efficiency. The application combines the spiral pile structure and the construction method of the sinking pipe pile, combines the spiral blade to the concrete pouring pile through the special structure of the spiral wing and the pile tip, greatly improves the bearing capacity, is fast in construction speed, small in construction noise, and expands the type of the spiral pile.

Description

Technical Field

[0001] This invention belongs to the field of foundation technology and relates to the application of concrete piles, particularly a winged spiral driven cast-in-place pile and its construction method. Background Technology

[0002] Helical piles are a special type of pile foundation that has emerged in recent years. They are formed by welding one or more helical blades onto a regular hollow steel pipe pile, giving them the ability to resist vertical compressive and tensile loads as well as horizontal loads. The presence of the helical blades increases the contact area and interfacial shear strength between the pile and the foundation soil, while also increasing the radius of the pile's slip surface, thus significantly improving the pile foundation's bearing capacity. Furthermore, helical piles are extremely fast to construct, easy to ensure construction quality, produce no vibration or noise, and can be recycled under certain conditions, making them a promising option for widespread application in China.

[0003] Currently, helical piles are mainly used for rapid reinforcement of roadbeds and slopes, as well as for pipeline foundations, oil pipeline foundations, and support foundations for photovoltaic power generation projects. However, helical piles are still primarily used in combination with precast steel piles, and are rarely used for concrete piles. Generally speaking, due to their relatively small size, the bearing capacity of steel pipe piles is generally lower than that of concrete piles. In domestic civil engineering, the usage rate of concrete piles is also far higher than that of steel pipe piles.

[0004] Therefore, how to combine steel pipe piles and concrete piles so that the advantages of both can work together in the foundation is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a method for constructing a winged helical driven pipe cast-in-place pile that incorporates helical blades into concrete piles, thereby improving the bearing capacity of helical piles, expanding the types of helical piles, and broadening the scope of application of helical piles in engineering.

[0006] The objective of this invention can be achieved through the following technical solution: a winged helical driven pile, comprising at least one sleeve, a helical wing sleeved on the sleeve, the sleeve and the helical wing forming a through-hole avoidance assembly through an axial insertion structure, the sleeve and the helical wing forming a disassembly and assembly fit through a rotational snap-fit ​​structure, the lowest end of the sleeve sleeved with a pile tip, the sleeve and the pile tip forming a disassembly and assembly fit through a rotational snap-fit ​​structure, a reinforcing cage inserted into the sleeve, concrete poured into the pile tip and the sleeve, the concrete covering the reinforcing cage, and the concrete solidifying and bonding the pile tip and the helical wing.

[0007] In the aforementioned winged spiral driven pipe pile, two or more casing sections are connected along the axis. The bottom opening of the casing is an internally threaded pipe opening, and the top opening is an externally threaded pipe opening. Adjacent casing sections are nested into each other to form a threaded meshing connection for disassembly and assembly.

[0008] In the aforementioned winged spiral driven pipe pile, the spiral blade includes a cylinder, and spiral blades are arranged around the outer circumference of the cylinder. The number of spiral turns of the blades is at least two, and the radius of the blades increases progressively from bottom to top.

[0009] In the aforementioned winged spiral driven pipe pile, the axial insertion structure includes a through groove opened axially on the inner wall of the cylinder, and a corresponding assembly pin is provided on the outer wall of the sleeve. The sleeve passes through the cylinder so that the assembly pin passes through the through groove.

[0010] In the aforementioned winged spiral driven pipe pile, the rotating locking structure includes an L-shaped groove on the inner wall of the cylinder. The first vertical groove of the L-shaped groove extends axially from one end of the cylinder. The first horizontal groove of the L-shaped groove connects to the inner end of the first vertical groove and extends circumferentially. A positioning pin is correspondingly protruded from the outer wall of the sleeve. The sleeve passes through the cylinder, causing the positioning pin to slide along the first vertical groove of the L-shaped groove. The sleeve rotates relative to the cylinder, causing the positioning pin to slide along the first horizontal groove of the L-shaped groove to the positioning position.

[0011] In the aforementioned winged spiral driven pile, the pile tip is a conical shell, the large-diameter opening at the top of the conical shell is connected to a circular ring interface, and the bottom end of the conical shell is a cone tip.

[0012] In the aforementioned winged spiral driven pipe pile, the rotating clamping structure two includes an L-shaped groove two opened on the inner wall of the annular interface. The second vertical groove of the L-shaped groove two extends axially from the annular interface. The second horizontal groove of the L-shaped groove two connects to the inner end of the second vertical groove and extends circumferentially. The sleeve is inserted into the annular interface to allow the assembly pin to slide along the second vertical groove of the L-shaped groove two. The sleeve rotates relative to the annular interface to allow the assembly pin to slide along the second horizontal groove of the L-shaped groove two to a position.

[0013] In the aforementioned winged spiral driven pipe cast-in-place pile, the assembly pin is specifically a solid rod or block, the positioning pin is specifically a solid rod or block, the length of the assembly pin is not greater than the depth of the through trench and the second L-shaped trench, and the length of the positioning pin is not greater than the depth of the first L-shaped trench.

[0014] A construction method for a winged helical driven cast-in-place pile includes the following steps:

[0015] 1) Use a drilling rig to spirally drill the first section of casing with a spiral blade and pile tip into the foundation. Then connect the bottom of the second section of casing with a spiral blade to the top of the first section of casing. Then use the drilling rig to screw the second section of casing into the foundation. Connect and screw in the Nth section of casing with a spiral blade in sequence to reach the required length.

[0016] 2) Place the steel cage inside the N-segment sleeve, rotate the N-segment sleeve to move the positioning pin along the circumferential direction to the first vertical groove position of L-shaped groove one, and move the assembly pin along the circumferential direction to the second vertical groove position of L-shaped groove two, forming a separable state.

[0017] 3) Pour concrete into the N-segment casing, simultaneously lift and rotate the N-segment casing, so that the positioning pin and assembly pin are aligned and pass through the through grooves of several spiral blades one by one, so as to separate the N-segment casing from several spiral blades one by one until the N-segment casing is completely pulled out of the foundation and the N-segment casing is disassembled segment by segment on the ground.

[0018] 4) During the solidification process, the concrete bonds with the pile tip and several spiral blades until the concrete column is completely solidified, forming a cast-in-place pile with multiple spiral blades in the foundation.

[0019] In the above-mentioned construction method of winged spiral driven pipe pile, in step 3), during the process of pulling out N sections of casing, N sections of casing are repeatedly raised and lowered. The lifting and lowering action is used to make the concrete evenly mixed. During the mixing process, the concrete is poured into the through groove and L-shaped groove one on the inner circumference of the spiral wing, and the concrete is poured into L-shaped groove two on the inner circumference of the pile tip, so that the concrete pile body, spiral wing, and pile tip form an embedded interlocking, increasing the connection strength between the concrete and the spiral wing and pile tip.

[0020] Compared with existing technologies, this winged helical driven pipe pile and its construction method have the following advantages:

[0021] 1. This invention designs a specially constructed casing, spiral blade, pile tip and other structures, and provides a more reasonable connection and matching structure, as well as a loading and unloading separation method, so as to facilitate the operation of drilling the whole pile into the foundation and pulling out the whole pipe, simplifying the operation difficulty and significantly improving the work efficiency.

[0022] 2. This invention combines the construction method of helical pile structure with that of driven cast-in-place pile. By designing a specially structured helical blade and pile tip, the helical blade is integrated into the concrete cast-in-place pile, which greatly improves the bearing capacity, speeds up construction, reduces construction noise, and expands the types of helical piles, thus having broad application prospects. Attached Figure Description

[0023] Figure 1 This is the main structural view of the winged spiral driven cast-in-place pile.

[0024] Figure 2This is an exploded structural diagram of a winged spiral driven cast-in-place pile.

[0025] Figure 3 This is a cross-sectional view of the spiral blade in this winged spiral driven cast-in-place pile.

[0026] Figure 4 This is a cross-sectional view of the pile tip of this winged spiral driven cast-in-place pile.

[0027] Figure 5 This is a diagram showing the assembly steps of a winged spiral driven cast-in-place pile.

[0028] Figure 6 This is a step-by-step diagram of the construction method for this winged spiral driven cast-in-place pile.

[0029] In the diagram, 1. Sleeve; 1a. Assembly pin; 1b. Positioning pin; 2. Propeller; 2a. Cylinder; 2a1. Through groove; 2a2. L-shaped groove one; 2b. Blade; 3. Pile tip; 3a. Circular interface; 3a1. L-shaped groove two; 4. Reinforcing cage; 5. Concrete. Detailed Implementation

[0030] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments. Example

[0031] like Figures 1 to 4 As shown, the winged spiral driven pile includes at least one sleeve 1, with a spiral wing 2 sleeved on the sleeve 1. The sleeve 1 and the spiral wing 2 are connected by an axial insertion structure to form a through-hole assembly. The sleeve 1 and the spiral wing 2 are connected by a rotational snap-fit ​​structure to form a disassembly and assembly fit. The bottom end of the lowest sleeve 1 is sleeved with a pile tip 3. The sleeve 1 and the pile tip 3 are connected by a rotational snap-fit ​​structure to form a disassembly and assembly fit. A reinforcing cage 4 is inserted into the sleeve 1. Concrete 5 is poured into the pile tip 3 and the sleeve 1. The concrete 5 covers the reinforcing cage 4. The concrete 5 solidifies and bonds the pile tip 3 and the spiral wing 2.

[0032] Two or more sleeves 1 are connected along the axis. The bottom opening of sleeve 1 is an internally threaded pipe opening, and the top opening is an externally threaded pipe opening. Adjacent sleeves 1 are interlocked to form a threaded connection for assembly and disassembly. Alternatively, the bottom opening of sleeve 1 is an externally threaded pipe opening, and the top opening is an internally threaded pipe opening. This also allows for the screwing and interlocking of two adjacent sleeves 1 for assembly or disassembly. The threaded connection allows for the individual connection of the pipes through rotation, facilitating the assembly of different pipe lengths and the disassembly of sleeves 1.

[0033] like Figures 1 to 2As shown, the propeller 2 includes a cylinder 2a, with helical blades 2b wound around its outer circumference. Each blade 2b has at least two helical turns, with the radius of each turn increasing progressively from bottom to top. The cylinder 2a and blades 2b are made of steel and feature a blade structure that is smaller at the bottom and larger at the top. When the propeller 2 rotates in a directional manner, the blades 2b cut through the soil and facilitate drilling, reducing the difficulty of driving the pile into the bottom surface; simultaneously, it prevents upward pull-out forces from causing the propeller 2 to move upwards.

[0034] like Figure 3 As shown, the axial insertion structure includes a through groove 2a1 axially formed on the inner wall of the cylinder 2a. A corresponding mounting pin 1a protrudes from the outer wall of the sleeve 1. The sleeve 1 passes through the cylinder 2a, allowing the mounting pin 1a to pass through the through groove 2a1. Several mounting pins 1a are welded to the outer wall of the sleeve 1. The number, size, and position of the through groove 2a1 correspond one-to-one with the number of mounting pins 1a. When the sleeve 1 is fitted onto the cylinder 2a, the through grooves 2a1 create clearance spaces for each mounting pin 1a, ensuring the propeller 2 is correctly fitted onto the sleeve 1.

[0035] like Figure 3 As shown, the rotating snap-fit ​​structure includes an L-shaped groove 2a2 opened on the inner wall of the cylinder 2a. The first vertical groove of the L-shaped groove 2a2 extends axially from one end of the cylinder 2a. The first horizontal groove of the L-shaped groove 2a2 connects to the inner end of the first vertical groove and extends circumferentially. The outer wall of the sleeve 1 is correspondingly protruded with a positioning pin 1b. The sleeve 1 passes through the cylinder 2a, causing the positioning pin 1b to slide along the first vertical groove of the L-shaped groove 2a2. The sleeve 1 rotates relative to the cylinder 2a, causing the positioning pin 1b to slide along the first horizontal groove of the L-shaped groove 2a2 to the positioning position.

[0036] Several locating pins 1b are welded to the outer wall of the sleeve 1. The number, size, and position of the L-shaped grooves 2a2 correspond one-to-one with those of the locating pins 1b. When the sleeve 1 is fitted onto the cylinder 2a, the first vertical groove of the L-shaped grooves 2a2 forms an axial guide trajectory for the locating pins 1b, and the first horizontal groove of the L-shaped grooves 2a2 forms a circumferential guide trajectory for the locating pins 1b, until the locating pins 1b move to the end of the first horizontal groove of the L-shaped groove 2a2 to form a positioning abutment. Thus, the sleeve 1 is axially engaged and fixed relative to the spiral blade 2.

[0037] like Figure 2 As shown, the assembly pin 1a is specifically a solid rod or a square, and the positioning pin 1b is specifically a solid rod or a square. The length of the assembly pin 1a is not greater than the depth of the through groove 2a1 and the L-shaped groove 3a1, and the length of the positioning pin 1b is not greater than the depth of the L-shaped groove 2a2.

[0038] like Figure 2 As shown, the pile tip 3 is a conical shell, the large-diameter opening at the top of the conical shell is connected to the circular interface 3a, and the bottom end of the conical shell is a cone tip.

[0039] like Figure 4 As shown, the rotating snap-fit ​​structure includes an L-shaped groove 3a1 formed on the inner wall of the annular interface 3a. The second vertical groove of the L-shaped groove 3a1 extends axially from the annular interface 3a, and the second horizontal groove of the L-shaped groove 3a1 connects to the inner end of the second vertical groove and extends circumferentially. The sleeve 1 is inserted into the annular interface 3a, causing the assembly pin 1a to slide along the second vertical groove of the L-shaped groove 3a1. The sleeve 1 rotates relative to the annular interface 3a, causing the assembly pin 1a to slide along the second horizontal groove of the L-shaped groove 3a1 to a position. When the bottom of the sleeve 1 is fitted onto the pile tip 3, the second vertical grooves of the L-shaped groove 3a1 form an axial guide trajectory for the assembly pin 1a, and the second horizontal grooves of the L-shaped groove 3a1 form a circumferential guide trajectory for the assembly pin 1a, until the assembly pin 1a moves to the end of the second horizontal groove of the L-shaped groove 3a1 and forms a positioning abutment. Thus, the sleeve 1 is axially snapped and fixed relative to the pile tip 3.

[0040] like Figure 5 As shown, the assembly method of this winged helical driven cast-in-place pile is as follows:

[0041] (a) The sleeve 1 is inserted vertically downward into the propeller 2, while the assembly pins 1a pass through the through groove 2a1 and are located below the propeller 2.

[0042] (b) Rotate the sleeve 1 so that the positioning pin 1b is aligned with the top of the first vertical groove of the L-shaped groove 2a2;

[0043] (c) Continue to lower the sleeve 1 so that the positioning pin 1b enters the first vertical groove to the inner end, and rotate the sleeve 1 in a direction so that the positioning pin 1b enters the first horizontal groove of the L-shaped groove 2a2 to the end, thereby completing the installation of the propeller 2 on the sleeve 1.

[0044] (d) Fit the pile tip 3 onto the bottom opening of the sleeve 1, so that the assembly pin 1a enters the second vertical groove of the L-shaped groove 3a1 to the inner end, and rotate the sleeve 1 in a directional manner so that the assembly pin 1a enters the second horizontal groove of the L-shaped groove 3a1 to the end, thereby completing the installation of the pile tip 3 on the sleeve 1.

[0045] (e) Installation steps (a), (b) and (c) Assemble N spiral sleeves 1, and connect the N spiral sleeves 1 sequentially to form an integral pile column.

[0046] This winged helical driven cast-in-place pile features a specially constructed helical wing 2 and pile tip 3, with two types of grooves inside. These grooves cooperate with the protrusions on the casing 1 to enable the casing 1 to drive the rotation and drilling of the helical wing 2 and pile tip 3. Simultaneously, after the concrete 5 is poured, all three components can be disassembled and separated, allowing the helical wing 2 and pile tip 3 to reach and be fixed in a predetermined position in the foundation soil (generally a layer of good soil quality to increase the load-bearing capacity of the helical wing 2). Finally, the concrete pile is combined with the helical wing 2 to form a winged helical driven cast-in-place pile. The construction process of this pile type mainly includes the assembly and drilling of the helical casing 1, the lowering of the reinforcing cage 4 inside the casing 1 and the pouring of concrete 5, the separation of the casing 1 from the helical wing 2, and the disassembly of the casing 1. Example

[0047] Based on Embodiment 1, the difference in this embodiment is:

[0048] like Figure 6 As shown, a construction method for a winged helical driven cast-in-place pile includes the following steps:

[0049] Considering the drilling problems during the construction of the spiral sleeve 1, the spiral cast-in-place pile is particularly suitable for situations where the foundation soil is relatively loose, such as silty soil.

[0050] 1) Use a drilling rig to spirally drill the first section of casing 1 with spiral blade 2 and pile tip 3 into the foundation. Then connect the bottom of the second section of casing 1 with spiral blade 2 to the top of the first section of casing 1. Then use a drilling rig to screw the second section of casing 1 into the foundation. Connect and screw in the Nth section of casing 1 with spiral blade 2 in sequence to reach the required length.

[0051] An alternative to step 1) is to first assemble multiple sections of casing 1 with spiral blades 2 on the ground, and then attach a pile tip 3 to the bottom opening of the lowest casing 1, and then use a drilling rig to drill the entire structure into the foundation in one go.

[0052] 2) Place the steel cage 4 inside the N-segment sleeve 1, rotate the N-segment sleeve 1 so that the positioning pin 1b moves circumferentially to the first vertical groove position of the L-shaped groove 2a2, and the assembly pin 1a moves circumferentially to the second vertical groove position of the L-shaped groove 3a1, forming a separable state.

[0053] 3) Pour concrete 5 into N-segment sleeve 1, simultaneously lift and rotate N-segment sleeve 1, so that positioning pin 1b and assembly pin 1a are aligned and pass through the through groove 2a1 of several spiral blades 2 one by one, so as to separate N-segment sleeve 1 from several spiral blades 2 one by one until N-segment sleeve 1 is completely pulled out of the foundation, and N-segment sleeve 1 is disassembled segment by segment on the ground.

[0054] During the process of pulling out the N-segment sleeve 1, the N-segment sleeve 1 is repeatedly raised and lowered. The lifting and lowering action is used to mix the concrete 5 evenly. During the mixing process, the concrete 5 is poured into the through groove 2a1 and L-shaped groove 2a2 on the inner circumference of the spiral blade 2, and into the L-shaped groove 3a1 on the inner circumference of the pile tip 3, so that the concrete pile body and the spiral blade 2 and pile tip 3 form an embedded interlocking, increasing the connection strength between the concrete 5 and the spiral blade 2 and pile tip 3.

[0055] 4) During the solidification process, the concrete 5 bonds with the pile tip 3 and several spiral wings 2 until the concrete column is completely solidified, forming a cast-in-place pile with multiple spiral wings 2 in the foundation.

[0056] Compared with existing technologies, this winged helical driven pipe pile and its construction method have the following advantages:

[0057] 1. This invention designs a specially constructed casing, spiral blade, pile tip and other structures, and provides a more reasonable connection and matching structure, as well as a loading and unloading separation method, so as to facilitate the operation of drilling the whole pile into the foundation and pulling out the whole pipe, simplifying the operation difficulty and significantly improving the work efficiency.

[0058] 2. This invention combines the construction method of helical pile structure with that of driven cast-in-place pile. By designing a specially structured helical blade and pile tip, the helical blade is integrated into the concrete cast-in-place pile, which greatly improves the bearing capacity, speeds up construction, reduces construction noise, and expands the types of helical piles, thus having broad application prospects.

[0059] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0060] Although this document frequently uses terms such as sleeve 1; assembly pin 1a; positioning pin 1b; propeller 2; cylinder 2a; through groove 2a1; L-shaped groove one 2a2; blade 2b; pile tip 3; annular interface 3a; L-shaped groove two 3a1; reinforcing cage 4; and concrete 5, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

[0061] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A winged spiral driven cast-in-place pile, comprising at least one casing section, characterized in that, A spiral blade is fitted onto the sleeve. The sleeve and the spiral blade are connected by an axial insertion structure to form a through-hole assembly. The sleeve and the spiral blade are connected by a rotating snap-fit ​​structure to form a disassembly and assembly fit. The lowest end of the sleeve is fitted onto the pile tip. The sleeve and the pile tip are connected by a rotating snap-fit ​​structure to form a disassembly and assembly fit. A reinforcing cage is inserted into the sleeve. Concrete is poured into the pile tip and the sleeve. The concrete covers the reinforcing cage. The concrete solidifies and bonds the pile tip and the spiral blade. The spiral blade includes a cylinder. Spiral blades are wound around the outer circumference of the cylinder. The number of spiral turns of the blades is at least two. The radius of the blades increases gradually from bottom to top. The axial insertion structure includes a through groove opened axially on the inner wall of the cylinder. An assembly pin is correspondingly protruded on the outer wall of the sleeve. The sleeve passes through the cylinder so that the assembly pin passes through the through groove.

2. The winged spiral driven cast-in-place pile as described in claim 1, characterized in that, Two or more sleeves are connected along the axis. The bottom opening of the sleeve is an internally threaded pipe opening, and the top opening is an externally threaded pipe opening. Adjacent sleeves are nested into each other to form a threaded meshing connection for disassembly and assembly.

3. The winged spiral driven cast-in-place pile as described in claim 1, characterized in that, The rotating snap-fit ​​structure includes an L-shaped groove on the inner wall of the cylinder. The first vertical groove of the L-shaped groove extends axially from one end of the cylinder. The first horizontal groove of the L-shaped groove connects to the inner end of the first vertical groove and extends circumferentially. A positioning pin is correspondingly protruded from the outer wall of the sleeve. The sleeve passes through the cylinder, causing the positioning pin to slide along the first vertical groove of the L-shaped groove. The sleeve rotates relative to the cylinder, causing the positioning pin to slide along the first horizontal groove of the L-shaped groove to the positioning position.

4. The winged spiral driven cast-in-place pile as described in claim 3, characterized in that, The pile tip is a conical shell, the large-diameter opening at the top of the conical shell is connected to a circular interface, and the bottom end of the conical shell is a cone tip.

5. The winged spiral driven cast-in-place pile as described in claim 4, characterized in that, The second rotating snap-fit ​​structure includes an L-shaped groove on the inner wall of the annular interface. The second vertical groove of the second L-shaped groove extends axially from the annular interface. The second horizontal groove of the second L-shaped groove connects to the inner end of the second vertical groove and extends circumferentially. The sleeve is inserted into the annular interface to allow the assembly pin to slide along the second vertical groove of the second L-shaped groove. The sleeve is rotated relative to the annular interface to allow the assembly pin to slide along the second horizontal groove of the second L-shaped groove to a position.

6. The winged spiral driven cast-in-place pile as described in claim 5, characterized in that, The assembly pin is specifically a solid rod or block, the positioning pin is specifically a solid rod or block, the length of the assembly pin is not greater than the depth of the through groove and the second L-shaped groove, and the length of the positioning pin is not greater than the depth of the first L-shaped groove.

7. A construction method for a winged helical driven cast-in-place pile, applied to the winged helical driven cast-in-place pile as described in claim 5, characterized in that, Includes the following steps: 1) Use a drilling rig to spirally drill the first section of casing with a spiral blade and pile tip into the foundation. Then connect the bottom of the second section of casing with a spiral blade to the top of the first section of casing. Then use the drilling rig to screw the second section of casing into the foundation. Connect and screw in the Nth section of casing with a spiral blade in sequence to reach the required length. 2) Place the steel cage inside the N-segment sleeve, rotate the N-segment sleeve to move the positioning pin along the circumferential direction to the first vertical groove position of L-shaped groove one, and move the assembly pin along the circumferential direction to the second vertical groove position of L-shaped groove two, forming a separable state. 3) Pour concrete into the N-segment casing, simultaneously lift and rotate the N-segment casing, so that the positioning pin and assembly pin are aligned and pass through the through grooves of several spiral blades one by one, so as to separate the N-segment casing from several spiral blades one by one until the N-segment casing is completely pulled out of the foundation and the N-segment casing is disassembled segment by segment on the ground. 4) During the solidification process, the concrete bonds with the pile tip and several spiral blades until the concrete column is completely solidified, forming a cast-in-place pile with multiple spiral blades in the foundation.

8. The construction method of the winged helical driven cast-in-place pile as described in claim 7, characterized in that, In step 3), during the process of pulling out the N-segment sleeve, the N-segment sleeve is repeatedly raised and lowered. The lifting and lowering action is used to mix the concrete evenly. During the mixing process, the concrete is poured into the through groove and L-shaped groove one on the inner circumference of the spiral blade, and the concrete is poured into L-shaped groove two on the inner circumference of the pile tip, so that the concrete pile body and the spiral blade and pile tip form an embedded interlocking, increasing the connection strength between the concrete and the spiral blade and pile tip.

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