A PC (Precast Concrete) pile and its construction method

Abstract

This invention relates to the field of construction engineering and discloses a precast concrete (PC) pile method and its construction method, comprising several steel pipe piles and several Larssen sheet piles, and a pile driver. The pile driver includes a pipe body, a steel pipe pile driving assembly, a Larssen sheet pile driving assembly, and a pile driver that applies downward pressure to the pipe body. The steel pipe pile driving assembly includes a first steel ring and a second steel ring respectively sleeved on the outer wall of the pipe body; the first steel ring is fixed to the pipe body, and the second steel ring is movably connected to the pipe body; the second steel ring has a threaded hole, and the first steel ring has a bolt threaded to the threaded hole; the outer diameter of the second steel ring is larger than the outer diameter of the first steel ring. The PC pile method and its construction method provided by this invention can drive the pile top to the designed underground elevation, achieve multi-threaded operation with one machine, and are stable, reliable, convenient to construct, have a short cycle, are reusable, economical, and environmentally friendly.

Description

Technical Field

[0001] This invention relates to the field of building engineering, and in particular to a PC (precast concrete) pile and its construction method. Background Technology

[0002] PC (Precast Concrete) piles are composite piles formed by combining Larssen piles with steel pipes to create various cross-sections. They are suitable for support structures in foundation pit engineering, and can be used as a reference for land-based sections of building construction, municipal engineering, port engineering, water conservancy projects, and foundation pits near water. As a reusable and environmentally friendly building material, PC piles have many advantages, including high strength, lightweight, stable material, reliable quality, good durability, good weather resistance, water-stopping properties, no pollution throughout the entire process, convenient construction, simple inspection and acceptance procedures, short construction cycle, and good economic benefits from repeated use. These advantages have made them highly valued and favored by the foundation pit industry.

[0003] There are generally two construction methods for precast concrete (PC) piles used in foundation pit support: one where the pile top design elevation is above ground level, and the other where it is below ground level. The method where the pile top design elevation is below ground level involves first excavating the earth to the designed pile top elevation before constructing the PC piles. However, current site conditions often do not allow for excavation to the designed pile top elevation, necessitating the use of pile driving devices. However, existing pile driving devices cannot meet the construction requirements of PC piles, significantly limiting their application. Using other support methods results in longer construction periods and higher costs, failing to meet the economic requirements of the project. Summary of the Invention

[0004] (a) Technical problems to be solved To address the aforementioned shortcomings, this invention provides a precast concrete (PC) pile and its construction method, which can bring the pile top to the underground design elevation, meet the construction requirements of PC piles, expand the application of PC piles, and simultaneously ensure the economic efficiency of foundation pit support engineering.

[0005] (II) Technical Solution To address the aforementioned technical problems, this invention provides a PC (Precast Concrete) pile, comprising a plurality of steel pipe piles and a plurality of Larssen sheet piles, and further comprising a pile driver. The pile driver includes: a pipe body, a steel pipe pile driving assembly, a Larssen sheet pile driving assembly, and a pile driver that applies downward pressure to the pipe body. The steel pipe pile driving assembly includes: a first steel ring and a second steel ring respectively sleeved on the outer wall of the pipe body; the first steel ring is fixed to the pipe body, and the second steel ring is movably connected to the pipe body; the second steel ring has a threaded hole, and the first steel ring has a bolt threaded to the threaded hole; the outer diameter of the second steel ring is larger than the outer diameter of the first steel ring. The Larssen sheet pile driving assembly includes: an angle steel horizontally arranged at the bottom of the pipe body, and two steel plates vertically arranged on the angle steel; the two steel plates are arranged parallel to each other, and the gap between them is equal to the thickness of the Larssen sheet pile.

[0006] Preferably, the first steel ring and the second steel ring are respectively provided with vent holes.

[0007] Preferably, the steel pipe pile driving assembly further includes: a plurality of wedge-shaped reinforcing ribs; each of the reinforcing ribs is fixedly connected to the top of the first steel ring and the outer wall of the pipe body, respectively.

[0008] Preferably, the outer diameter of the tube body is 630-640 mm; the outer diameter of the first steel ring is 800-830 mm; and the outer diameter of the second steel ring is 920-950 mm.

[0009] More preferably, the outer diameter of the tube body is 630 mm; the outer diameter of the first steel ring is 800 mm; and the outer diameter of the second steel ring is 920 mm.

[0010] This invention also provides a method for constructing PC (polycarbonate) piles, including the PC piles described in any of the above claims, wherein the steel pipe piles include: a first steel pipe pile, a second steel pipe pile, and a third steel pipe pile. The outer diameter of the pipe body is equal to that of the first steel pipe pile, the outer diameter of the first steel ring is equal to that of the second steel pipe pile, and the outer diameter of the second steel ring is equal to that of the third steel pipe pile. The steps of the method are as follows: Step 1: Measurement and layout: Determine the center line of the pile group and the center position of the first steel pipe pile and the first Larssen sheet pile; Step 2: Pile driving: Using pile driving equipment, the first steel pipe pile and the first Larssen sheet pile are driven into the foundation at the center position, keeping the top of the piles above the ground. Step 3: First pile driving: Place the bottom of the pipe body above the top of the first steel pipe pile in Step 2, abutting against its top. Start the pile driver and move it downward, applying downward pressure to the pipe body, and drive the first steel pipe pile to the designed pile top elevation below the ground under the action of external pressure; Insert the top of the Larssen steel sheet pile mentioned in Step 2 into the gap between the two steel plates, keeping the pipe body above its pile top. Start the pile driver and move it downward, applying downward pressure to the pipe body, and drive the Larssen steel sheet pile to the designed pile top elevation below the ground under the action of external pressure; Step 4: Second Pile Driving: Remove the second steel ring. Along the center line of the pile row, adjacent to the first Larssen sheet pile, drive the second steel pipe pile and the second Larssen sheet pile into the foundation using a pile driving device, ensuring that the tops of both piles are above ground level. Insert the pipe body into the second steel pipe pile, so that the bottom of the first steel ring is positioned above the top of the second steel pipe pile and abuts against it. Start the pile driver and move it downward, applying downward pressure to the pipe body, driving the second steel pipe pile to the designed pile top elevation below ground level under the external pressure. Insert the top of the second Larssen sheet pile into the gap between the two steel plates, keeping the pipe body above its pile top. Start the pile driver and move it downward, applying downward pressure to the pipe body, driving the second Larssen sheet pile to the designed pile top elevation below ground level under the external pressure. Step 5: Third pile driving: Install the second steel ring on the pipe body and connect and fix it to the first steel ring with bolts. Along the center line of the pile row, next to the second Larssen steel sheet pile, drive the third steel pipe pile and the third Larssen steel sheet pile into the foundation in sequence using a pile driving equipment, keeping their pile tops above the ground. Insert the pipe body into the third steel pipe pile, so that the bottom of the second steel ring is placed above the pile top of the third steel pipe pile and abuts against it. Start the pile driver to move downward, apply downward pressure to the pipe body, and drive the third steel pipe pile to the designed pile top elevation below the ground. Insert the pile top of the third Larssen steel sheet pile into the gap between the two steel plates, keeping the pipe body above its pile top. Start the pile driver to move downward, apply downward pressure to the pipe body, and drive the third Larssen steel sheet pile to the designed pile top elevation below the ground. Step 6: Repeat steps 3 to 5 above, and construct each pile one by one, ensuring that the top of each pile is connected on the ground. Then, move it to the designed pile top elevation below the ground until the construction is completed.

[0011] Preferably, multiple Larssen sheet piles can be installed between the first steel pipe pile and the second steel pipe pile; multiple Larssen sheet piles can be installed between the second steel pipe pile and the third steel pipe pile.

[0012] (III) Beneficial Effects This invention provides a PC (polycarbonate) pile and its construction method. The pipe body is connected to the top of the steel pipe pile, and under the pressure of the pile driver, the steel pipe pile is driven to the design elevation below ground level. By setting a first steel ring and a detachable second steel ring, multiple steel pipe piles of different diameters can be driven. Simultaneously, parallel steel plates are set at the bottom of the pipe body to drive Larssen sheet piles to the design elevation below ground level. This achieves multi-threaded operation with a single machine, fully meeting the construction requirements of PC piles, expanding the application of PC piles, and offering stability, reliability, convenient construction, short cycle time, reusability, and economic and environmental benefits. Attached Figure Description

[0013] Figure 1 This is a front view structural schematic diagram of an embodiment of the PC method pile of the present invention; Figure 2 This is a top view of an embodiment of the PC method pile of the present invention; Figure 3 This is a schematic diagram of an embodiment of the PC method pile construction process of the present invention; Figure 4 This is a schematic diagram of another embodiment of the PC method pile construction process of the present invention; Figure 5 This is a plan view of an embodiment of the PC method pile construction process of the present invention.

[0014] in: Detailed Implementation The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the invention.

[0015] 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.

[0016] This invention provides a PC (polycarbonate) pile, such as Figures 1-2As shown, the PC method pile includes several steel pipe piles and several Larssen sheet piles 6, as well as a pile driver. The pile driver includes: a pipe body 1, a steel pipe pile driving assembly, a Larssen sheet pile driving assembly, and a pile driver 4 that applies downward pressure to the pipe body 1. The pile driver 4 is typically a hydrostatic press or an electric motor, and is generally positioned directly above the pipe body 1. After activation, it moves downwards to apply downward pressure to the pipe body 1.

[0017] The pipe body 1 is typically constructed of robust and reliable steel to prevent deformation during pile driving. The outer diameter of the pipe body 1 is preferably 630–640 mm, and more preferably 630 mm. During pile driving, the bottom of the pipe body 1 is placed above the top of the steel pipe pile, connecting with the pile top. The pile driver 4 is then activated and moved downwards to apply downward pressure to the pipe body 1, thereby driving the steel pipe pile to the designed elevation below ground level under external pressure.

[0018] The steel pipe pile driving assembly includes a first steel ring 21 and a second steel ring 22 respectively fitted onto the outer wall of the pipe body 1.

[0019] The first steel ring 21 is fixedly connected to the pipe body 1, and its inner wall is connected to the outer wall of the pipe body 1 by welding or other fixing methods. During pile driving, the pipe body 1 is inserted into the steel pipe pile, so that the bottom of the first steel ring 21 is placed above the pile top and abuts against the pile top. The pile driver 4 moves downward to apply downward pressure to the pipe body 1. Under the action of the external pressure of the pipe body 1, the steel pipe pile is driven to the design elevation below the ground. In this embodiment, it is preferred that the first steel ring 21 drives the steel pipe pile with an outer diameter of 800-830mm, and more preferably with an outer diameter of 800mm.

[0020] The second steel ring 22 is movably connected to the pipe body 1, and its inner wall can slide up and down on the outer wall of the pipe body 1, making it easy to disassemble and remove from the pipe body 1. The second steel ring 22 is provided with a threaded hole 221, and the first steel ring 21 is provided with a bolt 211 that is threadedly connected to the threaded hole 221. The threaded hole 221 is usually a vertical through hole. The bolt 211 can be fixed to the bottom of the first steel ring 22 and adapted to the threaded hole 221, or the bolt 211 can be threaded and fixed by providing a threaded hole on the first steel ring 21 and passing through the threaded hole to engage with the threaded hole 221 on the second steel ring 22. The outer diameter of the second steel ring 22 is larger than the outer diameter of the first steel ring 21. The second steel ring 22 can deliver steel pipe piles with an outer diameter larger than that of the first steel ring 21. In this embodiment, it is preferred that the second steel ring 22 delivers steel pipe piles with an outer diameter of 920-950 mm, and more preferably, the outer diameter is 920 mm. During pile driving, the second steel ring 22 is fitted onto the pipe body 1 and connected and fixed to the first steel ring 21 by bolts 211. The pipe body 1 is then inserted into the steel pipe pile, so that the bottom of the second steel ring 22 is placed above the pile top and abuts against the pile top. The pile driver 4 moves downward to apply downward pressure to the pipe body 1. Under the action of the external pressure of the pipe body 1, the steel pipe pile is driven to the design elevation below the ground.

[0021] The second steel ring 22 is fixed to the pipe body 1 by a threaded connection, which is easy to disassemble. It is used in conjunction with the first steel ring 21 to realize the driving of steel pipe piles of multiple diameters. That is, when it is necessary to drive steel pipe piles with an outer diameter of 800-830mm, the second steel ring 22 is removed, and when it is necessary to drive steel pipe piles with an outer diameter of 920-950mm, the second steel ring 22 is installed.

[0022] The Larssen sheet pile driving assembly includes: an angle steel 31 horizontally arranged at the bottom of the pipe body 1, and two steel plates 32 vertically arranged on the angle steel 31; the two steel plates 32 are arranged in parallel, and the gap between them is equal to the thickness of the Larssen sheet pile 6. Multiple angle steels 31 can be arranged horizontally in parallel, which can make the steel plates 32 more securely fixed.

[0023] When used for driving Larssen sheet piles 6, the top of the Larssen sheet pile is inserted into the gap between the two steel plates 32, so that the pipe body 1 is kept above the top of the Larssen sheet pile 6. The pile driver 4 is started and moved downward to apply downward pressure to the pipe body 1. Under the action of the external pressure of the pipe body 1, the Larssen sheet pile 6 is driven to the design elevation below the ground.

[0024] Based on the above embodiments, the first steel ring 21 and the second steel ring 22 are respectively provided with vent holes 222. The vent holes 222 can reduce the pile driving resistance and improve the compressive strength of the pipe body 1.

[0025] Based on the above embodiments, the steel pipe pile driving assembly further includes: multiple wedge-shaped reinforcing ribs 23; each reinforcing rib 23 is fixedly connected to the top of the first steel ring 21 and the outer wall of the pipe body 1, respectively. The reinforcing rib 23 is preferably a right-angled triangular wedge, with its two right-angled surfaces fixed to the top of the first steel ring 21 and the outer wall of the pipe body 1, respectively. The reinforcing rib 23 can improve the compressive strength of the first steel ring 21 and the second steel ring 22.

[0026] This invention also provides a PC (polycarbonate) pile construction method, such as... Figures 3-5 As shown, the PC method pile includes any of the above embodiments, wherein the steel pipe pile includes: a first steel pipe pile 51, a second steel pipe pile 52, and a third steel pipe pile 53. The outer diameter of the pipe body 1 and the first steel pipe pile 51 are equal, the outer diameter of the first steel ring 21 and the second steel pipe pile 52 are equal, and the outer diameter of the second steel ring 22 and the third steel pipe pile 53 are equal. The steps of the method are as follows: Step 1: Measurement and layout: Determine the center line of the pile group and the center position of the first steel pipe pile 51 and the first Larssen steel sheet pile 6; Step 2: Pile driving: Using pile driving equipment, the first steel pipe pile 51 and the first Larssen sheet pile 6 are driven into the foundation at the center position, keeping their tops above the ground. Step 3: First pile driving: Place the bottom of the pipe body 1 above the top of the first steel pipe pile 51 in Step 2, abutting against its top. Start the pile driver 4 and move it downward to apply downward pressure to the pipe body 1, driving the first steel pipe pile 51 to the designed pile top elevation below the ground under the action of external pressure; Insert the top of the Larssen steel sheet pile 6 mentioned in Step 2 into the gap between the two steel plates 32, keeping the pipe body 1 above its pile top. Start the pile driver 4 and move it downward to apply downward pressure to the pipe body 1, driving the Larssen steel sheet pile 6 to the designed pile top elevation below the ground under the action of external pressure; Step 4: Second pile driving: Remove the second steel ring 22, and along the center line of the pile row, drive the second steel pipe pile 52 and the second Larssen steel sheet pile 6 into the foundation in sequence using a pile driving device, keeping their tops above the ground; insert the pipe body 1 into the second steel pipe pile 52, so that the bottom of the first steel ring 21 is placed above the top of the second steel pipe pile 52 and abuts against it; start the pile driver 4 and move it downward, applying downward pressure to the pipe body 1, and drive the second steel pipe pile 52 to the design pile top elevation below the ground under the action of external pressure; insert the top of the second Larssen steel sheet pile 6 into the gap between the two steel plates 32, keeping the pipe body 1 above its pile top; start the pile driver 4 and move it downward, applying downward pressure to the pipe body 1, and drive the second Larssen steel sheet pile 6 to the design pile top elevation below the ground under the action of external pressure; Step 5: Third pile driving: Install the second steel ring 22 on the pipe body 1 and connect and fix it to the first steel ring 21 with bolts 211. Along the center line of the pile row, next to the second Larssen sheet pile 6, drive the third steel pipe pile 53 and the third Larssen sheet pile 6 into the foundation in sequence using a pile driving equipment, keeping their pile tops above the ground. Insert the pipe body 1 into the third steel pipe pile 53, so that the bottom of the second steel ring 22 is placed above the pile top of the third steel pipe pile 53 and abuts against it. Start the pile driver 4 to move downward, apply downward pressure to the pipe body 1, and drive the third steel pipe pile 53 to the designed pile top elevation below the ground. Insert the pile top of the third Larssen sheet pile 6 into the gap between the two steel plates 32, keep the pipe body 1 above its pile top, start the pile driver 4 to move downward, apply downward pressure to the pipe body 1, and drive the third Larssen sheet pile 6 to the designed pile top elevation below the ground. Step 6: Repeat steps 3 to 5 above, and construct each pile one by one, ensuring that the top of each pile is connected on the ground. Then, move it to the designed pile top elevation below the ground until the construction is completed.

[0027] Based on the above embodiments, multiple Larssen sheet piles 6 can be installed between the first steel pipe pile 51 and the second steel pipe pile 52; multiple Larssen sheet piles 6 can be installed between the second steel pipe pile 52 and the third steel pipe pile 53.

[0028] Example 1 The PC method pile includes a first steel pipe pile 51, a second steel pipe pile 52, and a third steel pipe pile 53, and several Larssen steel sheet piles 6, as well as a pile driver. The pile driver includes a pipe body 1, a steel pipe pile driving assembly, a Larssen steel sheet pile driving assembly, and a pile driver 4 that applies downward pressure to the pipe body 1.

[0029] The outer diameters of the pipe body 1 and the first steel pipe pile 51 are equal, the outer diameters of the first steel ring 21 and the second steel pipe pile 52 are equal, and the outer diameters of the second steel ring 22 and the third steel pipe pile 53 are equal.

[0030] The steel pipe pile driving assembly includes a first steel ring 21 and a second steel ring 22 respectively fitted onto the outer wall of the pipe body 1. The first steel ring 21 is fixedly connected to the pipe body 1, and the second steel ring 22 is movably connected to the pipe body 1. The second steel ring 22 has a threaded hole 221, and the first steel ring 21 has a bolt 211 threadedly connected to the threaded hole 221. The outer diameter of the second steel ring 22 is larger than the outer diameter of the first steel ring 21, and the second steel ring 22 can drive steel pipe piles with an outer diameter larger than that of the first steel ring 21.

[0031] The Larssen sheet pile driving assembly includes: an angle steel 31 horizontally arranged at the bottom of the pipe body 1, and two steel plates 32 vertically arranged on the angle steel 31; the two steel plates 32 are arranged in parallel, and the gap between them is equal to the thickness of the Larssen sheet pile 6.

[0032] The construction steps of this PC method pile are as follows: Step 1: Measurement and layout: Determine the center line of the pile group, and determine the center position of the first steel pipe pile 51 and multiple Larssen steel sheet piles 6. Specifically, one Larssen steel sheet pile 6 is set up side by side on one side of the first steel pipe pile 51, and two Larssen steel sheet piles 6 are set up side by side on the other side. Step 2: Pile driving: Using pile driving equipment, the first steel pipe pile 51 and multiple Larssen steel sheet piles 6 are driven into the foundation at the central position, keeping the tops of the piles above the ground. Step 3: First pile driving: Insert the top of one Larssen sheet pile 6 on one side of the first steel pipe pile 51 from Step 2 into the gap between the two steel plates 32, keeping the pipe body 1 above the top of the pile. Start the pile driver 4 and move it downward, applying downward pressure to the pipe body 1, driving the Larssen sheet pile 6 to the designed pile top elevation below the ground under the external pressure; Place the bottom of the pipe body 1 above the top of the first steel pipe pile 51 from Step 2, abutting against its top, start the pile driver 4 and move it downward, applying downward pressure to the pipe body 1, driving the first steel pipe pile 51 to the designed pile top elevation below the ground under the external pressure; Remove the pile driver. Step 4: Second pile driving: Remove the second steel ring 22, and along the center line of the pile row, place one Larssen steel sheet pile 6 and the second steel pipe pile 52 next to the two Larssen steel sheet piles 6 on the other side of the first steel pipe pile 51 in Step 1. Drive the second steel pipe pile 52 and the Larssen steel sheet pile 6 into the foundation in sequence using the pile driving equipment, keeping the top of the piles above the ground. Step 5: Second pile driving: Insert the tops of the two Larssen sheet piles 6 on the other side of the first steel pipe pile 51 into the gap between the two steel plates 32 in sequence, so that the pipe body 1 is kept above the pile tops. Start the pile driver 4 to move downward and apply downward pressure to the pipe body 1. Drive the two Larssen sheet piles 6 to the designed pile top elevation below the ground under the action of external pressure; remove the pile driver. Step 6: Third pile driving: Insert the top of the Larssen sheet pile 6 from Step 4 into the gap between the two steel plates 32, keeping the pipe body 1 above the top of the pile. Start the pile driver 4 and move it downward, applying downward pressure to the pipe body 1, driving the second Larssen sheet pile 6 to the designed pile top elevation below the ground under the external pressure; insert the pipe body 1 into the second steel pipe pile 52, so that the bottom of the first steel ring 21 is placed above the top of the second steel pipe pile 52 and abuts against it. Start the pile driver 4 and move it downward, applying downward pressure to the pipe body 1, driving the second steel pipe pile 52 to the designed pile top elevation below the ground under the external pressure; remove the pile driver.

[0033] Example 2: Further implementation based on Example 1.

[0034] Step 7: Third pile driving: Install the second steel ring 22 on the pipe body 1 and connect and fix it to the first steel ring 21 with bolts 211. Along the center line of the pile row, place a Larssen steel sheet pile 6 and a third steel pipe pile 53 next to the second steel pipe pile 52 in step 4. Drive the third steel pipe pile 53 and the third Larssen steel sheet pile 6 into the foundation in sequence using the pile driving equipment, keeping their pile tops above the ground. Step 8: Third pile driving: Insert the top of the Larssen sheet pile 6 from Step 7 into the gap between the two steel plates 32, keeping the pipe body 1 above the top of the pile. Start the pile driver 4 and move it downward to apply downward pressure to the pipe body 1, driving the Larssen sheet pile 6 to the designed pile top elevation below the ground. Insert the pipe body 1 into the third steel pipe pile 53, so that the bottom of the second steel ring 22 is placed above the top of the third steel pipe pile 53 and abuts against it. Start the pile driver 4 and move it downward to apply downward pressure to the pipe body 1, driving the third steel pipe pile 53 to the designed pile top elevation below the ground. Example 3: Further implementation based on Example 2.

[0035] Repeat steps 1 to 8 above, constructing each pile one by one, ensuring that the top of each pile is connected on the ground, and then move it to the designed pile top elevation below the ground until construction is complete.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A PC (Precast Concrete) pile construction method, characterized in that, The PC method pile includes several steel pipe piles and several Larssen steel sheet piles, and also includes a pile driver, which includes: a pipe body, a steel pipe pile driving assembly, a Larssen steel sheet pile driving assembly, and a pile driver that applies downward pressure to the pipe body; The steel pipe pile driving assembly includes: a first steel ring and a second steel ring respectively sleeved on the outer wall of the pipe body; the first steel ring is fixed on the pipe body, and the second steel ring is movably connected to the pipe body; the second steel ring is provided with a threaded hole, and the first steel ring is provided with a bolt threadedly connected to the threaded hole; the outer diameter of the second steel ring is larger than the outer diameter of the first steel ring. The Larssen sheet pile driving assembly includes: an angle steel horizontally arranged at the bottom of the pipe body, and two steel plates vertically arranged on the angle steel; the two steel plates are arranged in parallel, and the gap between them is equal to the thickness of the Larssen sheet pile; The steel pipe pile includes: a first steel pipe pile, a second steel pipe pile, and a third steel pipe pile. The outer diameter of the pipe body is equal to that of the first steel pipe pile, the outer diameter of the first steel ring is equal to that of the second steel pipe pile, and the outer diameter of the second steel ring is equal to that of the third steel pipe pile. The steps of this method are as follows: Step 1: Measurement and layout: Determine the center line of the pile group and the center position of the first steel pipe pile and the first Larssen sheet pile; Step 2: Pile driving: Using pile driving equipment, the first steel pipe pile and the first Larssen sheet pile are driven into the foundation at the center position, keeping the top of the piles above the ground. Step 3: First pile driving: Place the bottom of the pipe body above the top of the first steel pipe pile in Step 2, abutting against its top. Start the pile driver and move it downward, applying downward pressure to the pipe body, and drive the first steel pipe pile to the designed pile top elevation below the ground under the action of external pressure; Insert the top of the Larssen steel sheet pile mentioned in Step 2 into the gap between the two steel plates, keeping the pipe body above its pile top. Start the pile driver and move it downward, applying downward pressure to the pipe body, and drive the Larssen steel sheet pile to the designed pile top elevation below the ground under the action of external pressure; Step 4: Second Pile Driving: Remove the second steel ring. Along the center line of the pile row, adjacent to the first Larssen sheet pile, drive the second steel pipe pile and the second Larssen sheet pile into the foundation using a pile driving device, ensuring that the tops of both piles are above ground level. Insert the pipe body into the second steel pipe pile, so that the bottom of the first steel ring is positioned above the top of the second steel pipe pile and abuts against it. Start the pile driver and move it downward, applying downward pressure to the pipe body, driving the second steel pipe pile to the designed pile top elevation below ground level under the external pressure. Insert the top of the second Larssen sheet pile into the gap between the two steel plates, keeping the pipe body above its pile top. Start the pile driver and move it downward, applying downward pressure to the pipe body, driving the second Larssen sheet pile to the designed pile top elevation below ground level under the external pressure. Step 5: Third pile driving: Install the second steel ring on the pipe body and connect and fix it to the first steel ring with bolts. Along the center line of the pile row, next to the second Larssen steel sheet pile, drive the third steel pipe pile and the third Larssen steel sheet pile into the foundation in sequence using a pile driving equipment, keeping their pile tops above the ground. Insert the pipe body into the third steel pipe pile, so that the bottom of the second steel ring is placed above the pile top of the third steel pipe pile and abuts against it. Start the pile driver to move downward, apply downward pressure to the pipe body, and drive the third steel pipe pile to the designed pile top elevation below the ground. Insert the pile top of the third Larssen steel sheet pile into the gap between the two steel plates, keeping the pipe body above its pile top. Start the pile driver to move downward, apply downward pressure to the pipe body, and drive the third Larssen steel sheet pile to the designed pile top elevation below the ground. Step 6: Repeat steps 3 to 5 above, and construct each pile one by one, ensuring that the top of each pile is connected on the ground. Then, move it to the designed pile top elevation below the ground until the construction is completed.

2. The PC pile construction method according to claim 1, characterized in that, The first steel ring and the second steel ring are respectively provided with exhaust holes.

3. The PC pile construction method according to claim 1, characterized in that, The steel pipe pile driving assembly further includes: multiple wedge-shaped reinforcing ribs; each reinforcing rib is fixedly connected to the top of the first steel ring and the outer wall of the pipe body respectively.

4. The PC pile construction method according to claim 1, characterized in that, The outer diameter of the tube is 630-640 mm; the outer diameter of the first steel ring is 800-830 mm; and the outer diameter of the second steel ring is 920-950 mm.

5. The PC pile construction method according to claim 3, characterized in that, The outer diameter of the tube is 630 mm; the outer diameter of the first steel ring is 800 mm; and the outer diameter of the second steel ring is 920 mm.

6. The PC pile construction method according to claim 1, characterized in that, Multiple Larssen sheet piles may be installed between the first steel pipe pile and the second steel pipe pile; multiple Larssen sheet piles may be installed between the second steel pipe pile and the third steel pipe pile.

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