Adjustable diameter pile driving guide tube device and its pile driving method without pile driver

Abstract

This invention provides an adjustable diameter pile driving guide tube device and its pile driving method without a pile driver, belonging to the field of pile driving technology. The adjustable guide tube device integrates a three-layer positioning system, which can simultaneously perform functions such as initial guidance, precise positioning, and hydraulic hammer guidance for steel pipe piles. The adjustable guide clamp has synchronous extension and precise positioning functions, enabling precise control of the center position of the steel pipe pile during pile driving, ensuring that the pile position deviation meets design requirements, and guaranteeing the installation quality of the subsequent guide frame structure. Simultaneously, the synchronous extension function allows the hydraulic hammer to smoothly pass through the guide tube to complete the pile driving operation. This eliminates the pile driver from the process source, saving the steps of pile driver installation, underwater docking, and dismantling, reducing the difficulty of underwater construction, minimizing safety risks, and effectively improving the efficiency of pile driving construction. Eliminating the pile driver avoids the energy loss caused by a long pile driver and reduces the impact energy requirements of the hydraulic hammer.

Description

Technical Field

[0001] This invention belongs to the field of pile driving technology, specifically relating to a pile driving method without a pile driver using an adjustable diameter pile driving guide cylinder device. Background Technology

[0002] With the rapid development of offshore wind power in China, offshore wind farms are rapidly moving to deeper and farther sea areas. In water depths of 30-70m, jacket foundations are more suitable than monopile foundations.

[0003] The jacket foundation structure typically consists of four steel pipe piles and one jacket structure. The top elevation of the steel pipe piles is designed to be 2m to 10m above the seabed. To ensure the jacket is accurately installed on the steel pipe piles, the design requires high accuracy in the planar position of the steel pipe piles, generally requiring a relative horizontal deviation of less than 50mm between any two piles.

[0004] To control the accuracy of pile driving, a pile stabilization and positioning platform is used for positioning, a crane ship uses a hydraulic hammer to drive the piles, and a matching pile driver is used to drive the steel pipe piles to the underwater design elevation.

[0005] There are two main methods for constructing pile driving systems using a combination of hydraulic hammer and pile driver. The conventional method in China is to use a submerged hydraulic hammer with a long pile driver, converting underwater pile driving into above-water pile driving. The length of the pile driver is generally 5m above the water surface from the designed pile top elevation, with a maximum length of 70m. During pile driving, the top of the pile driver remains approximately 5m above the water surface to prevent the hydraulic hammer from entering the water. The other method uses an underwater hydraulic hammer with a short pile driver. The hydraulic hammer can be submerged entirely, but due to the presence of the positioning platform's guide tube, the hydraulic hammer cannot pass through it. Therefore, a short pile driver, approximately 15m to 20m long, is used to connect the pile top to about 5m above the guide tube. During pile driving, the top of the pile driver remains approximately 5m above the top of the guide tube to ensure the hydraulic hammer does not hit the guide tube.

[0006] The above two methods mainly have the following problems: 1. The pile driving process requires the installation and removal of the pile driver, which has a significant impact on construction efficiency. The pile driver and the steel pipe pile need to be connected underwater, which is difficult to construct and poses certain safety risks.

[0007] 2. As the water depth increases, the energy loss caused by the long pile driver increases, which places higher demands on the energy requirements of the hydraulic hammer and increases the number of hammer blows required for pile driving. This is not conducive to the selection of pile driving equipment and the control of pile driving quality.

[0008] 3. The length of the pile drivers used for underwater pile driving is also increasing, making it more difficult to manufacture longer pile drivers and increasing construction costs.

[0009] 4. Some solutions that connect the short-pile driver and the hydraulic hammer into a whole require special storage and lifting measures for the hydraulic hammer, which increases the operation time and construction cost.

[0010] To address the issues of energy loss, reduced efficiency, and increased costs associated with pile drivers, an adjustable diameter pile driving guide tube device was developed, and a pile driving construction method that eliminates the need for a pile driver was established. Summary of the Invention

[0011] To address the aforementioned shortcomings, this invention simplifies the process, reduces underwater operations, significantly improves construction efficiency, and substantially reduces safety risks. It reduces energy consumption and equipment costs, eliminating energy loss from the pile driver and lowering the requirements for hydraulic hammer selection; it also eliminates the need to manufacture large pile drivers, saving on manufacturing, transportation, and storage costs. The integrated design simplifies the process; the guide cylinder is integrated into the positioning platform, eliminating the need for additional storage / lifting facilities, further simplifying the operation and controlling costs.

[0012] The present invention employs the following technical solution.

[0013] A pile driving method without a pile driver using an adjustable diameter pile driving guide tube device, comprising: Step 1: The hydraulic telescopic clamp 5 inside the guide tube is initially in the retracted state; Step 2: Use a crane ship to lift, turn over and erect the steel pipe piles 6 of the wind turbine foundation, and feed them into the first layer of the guiding device on the positioning platform for initial guidance; Step 3: The steel pipe pile is gradually lowered into the guide cylinder 1. The steel pipe pile is initially positioned by the flared opening at the top of the guide cylinder, the upper guide block, and the lower guide block. Step 4: After the bottom of the steel pipe pile passes the lower guide block, the hydraulic telescopic clamps extend synchronously through the remote control system and hydraulic drive device on the positioning platform. The thrust of the hydraulic telescopic clamps adjusts the center position of the steel pipe pile, and the extension amount of each hydraulic telescopic clamp is fed back by distance sensors to achieve precise positioning of the steel pipe pile, so that the steel pipe pile reaches the position required by the design. Continue to lower the steel pipe pile to complete the self-sinking of the steel pipe pile; Step 5: The steel pipe pile is driven down by gradually hammering it with a hydraulic hammer. The hydraulic hammer enters the guide cylinder through the upper guide block, and the hydraulic telescopic clamp is controlled to retract synchronously, so that the hydraulic hammer passes through the guide block and then gradually drives the steel pipe pile to the design elevation.

[0014] An adjustable diameter pile driving guide tube device, comprising: The guide cylinder is set in the lower part of the positioning platform and is arranged in plan according to the plan position of the steel pipe piles of the wind turbine foundation; The guide cylinder is equipped with three layers of guiding devices, which are arranged from top to bottom as the first layer, the second layer, and the third layer.

[0015] Furthermore, the positioning platform is an overall support frame, with the guide cylinder fixed in its lower part, providing an installation foundation and working platform for the guide cylinder; The guide cylinder body is a cylindrical structure, arranged one-to-one with the planar positions of the steel pipe piles of the wind turbine foundation, and is used for vertical guidance of the steel pipe piles and hydraulic hammer.

[0016] Furthermore, the top of the guide cylinder body has a flared opening.

[0017] Furthermore, the first-layer guiding device is located on the inner side of the upper part of the guide cylinder, and is responsible for the initial guidance of the steel pipe pile entering the cylinder and the guidance and limiting of the hydraulic hammer when it enters; The second-layer guide device is located on the inner side of the middle of the guide tube and is responsible for fine-tuning the pile position and retracting to make way when hammering. The third-layer guiding device is located on the lower inner side of the guide cylinder. It is responsible for guiding the lower outlet of the steel pipe pile 6, and at the same time limits and protects the hydraulic hammer and clamp.

[0018] Furthermore, both the first-layer guide device and the third-layer guide device use steel guide blocks, with the first-layer guide device using an upper guide block and the third-layer guide device using a lower guide block, respectively.

[0019] Furthermore, the first-layer guide device and the third-layer guide device have eight guide blocks evenly distributed in the circumferential direction inside the guide cylinder 1. On the one hand, the first-layer guide device is used for the initial guidance when the steel pipe pile enters the guide cylinder, and on the other hand, the first-layer guide device and the third-layer guide device are used for the guidance after the hydraulic hammer enters the guide cylinder.

[0020] Furthermore, the second-layer guiding device adopts a telescopic hydraulic clamp type, that is, eight hydraulic telescopic clamps are evenly distributed in the circumferential direction inside the guide cylinder for guiding the steel pipe pile sinking process. Distance sensors and pressure sensors are installed on the hydraulic telescopic clamps to realize synchronous telescopic function. A remote control system and hydraulic drive device that are connected to the distance sensors and pressure sensors are arranged on the positioning platform to control the synchronous telescopic clamps.

[0021] Furthermore, when the steel pipe pile is driven into the ground, eight clamps extend simultaneously, and the arc they form can achieve precise positioning of the steel pipe pile, allowing it to reach the position required by the design.

[0022] Furthermore, the hydraulic telescopic clamp includes: The hydraulic drive unit and hydraulic telescopic cylinder are connected in communication with the controller, which provide radial telescopic power and can be remotely controlled for telescopic movement; The arc-shaped clamping block, which is connected to the hydraulic telescopic cylinder and serves as the clamp body, fits against the inner wall of the steel pipe pile and tightens or loosens the pile body during telescopic movement. Distance sensors are used to provide real-time feedback on the extension of each clamp body, ensuring that the eight clamp bodies are synchronized. A pressure sensor is used to monitor the clamping force on the hoop body.

[0023] The beneficial effects of the present invention are as follows, compared with the prior art: 1. The adjustable guide tube device integrates a three-layer positioning system, which can take into account the functions of initial guidance, precise positioning, and hydraulic hammer guidance of steel pipe piles.

[0024] 2. The adjustable guide clamp has synchronous telescopic and precise positioning functions, which can accurately control the center position of the steel pipe pile during the pile driving process, ensuring that the pile position deviation meets the design requirements and guaranteeing the installation quality of the subsequent jacket structure. At the same time, the synchronous telescopic function allows the hydraulic hammer to smoothly pass through the guide cylinder to complete the pile driving operation.

[0025] 3. The pile driver was eliminated from the process source, saving the steps of installation, underwater docking and dismantling of the pile driver. This not only reduced the difficulty of underwater construction, but also reduced safety risks and effectively improved the efficiency of pile driving construction.

[0026] 4. By eliminating the pile driver, the energy loss caused by the long pile driver is avoided, the impact energy requirement of the hydraulic hammer is reduced, the selection of pile driving equipment is easier, the pile driving quality is better controlled, and unnecessary hammering operations are reduced.

[0027] 5. Eliminating the pile driver eliminates the need to manufacture large-sized, heavy pile drivers, reducing the manufacturing, transportation, and storage costs of large components, and reducing the overall construction investment of the project.

[0028] 6. The device is directly integrated on the positioning platform, eliminating the need for additional dedicated storage and lifting facilities for the pile driver and hydraulic hammer. This simplifies the operation process, further reduces additional operation time, and controls construction costs. Attached Figure Description

[0029] Figure 1 This is a schematic diagram showing the arrangement of the positioning platform and guide cylinder in this invention; Figure 2 This is a schematic diagram showing the arrangement of the guiding device inside the guide cylinder according to the present invention; Figure 3 This is a schematic diagram of the planar arrangement of the guide block according to the present invention; Figure 4 This is a schematic diagram of the planar arrangement of the hydraulic telescopic clamp described in this invention; Figure 5 This is a schematic diagram of the self-sinking positioning of the steel pipe pile described in this invention; Figure 6 This is a schematic diagram of the hydraulic hammer described in this invention passing through the guide cylinder. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. The embodiments described in this application are merely some embodiments of this invention, and not all embodiments. Based on the spirit of this invention, other embodiments obtained by those skilled in the art without creative effort are all within the protection scope of this invention.

[0031] like Figures 5 to 6 As shown, this invention proposes a pile driving method without a pile driver using an adjustable diameter pile driving guide tube device, comprising the following steps: Step 1: The hydraulic telescopic clamp 5 inside the guide cylinder 1 is initially in the retracted state; Step 2: Use a crane ship to lift, turn over and erect the steel pipe piles 6 of the wind turbine foundation, and feed them into the first layer of the guiding device on the positioning platform for initial guidance; Step 3: The steel pipe pile 6 is gradually lowered into the guide cylinder 1. The steel pipe pile 6 passes through the upper part of the guide cylinder 1. The flared mouth, upper guide block 3, and lower guide block 4 achieve initial positioning; Step 4: After the bottom of the steel pipe pile passes the lower guide block 4, it is controlled by the remote control system on the positioning platform 2. The system synchronously extends the hydraulic telescopic clamps 5, adjusting the center position of the steel pipe pile 6 through the thrust of the hydraulic telescopic clamps 5. The extension amount of each hydraulic telescopic clamp 5 is fed back by the distance sensor, so that the steel pipe pile 6 reaches the position required by the design. The steel pipe pile 6 continues to be lowered to complete the self-sinking of the steel pipe pile 6; Step 5: The hydraulic hammer 7 is used to gradually drive the steel pipe pile 6. The hydraulic hammer 7 enters the guide cylinder 1 through the upper guide block 3, and the hydraulic telescopic clamp 5 is controlled to retract synchronously, so that the hydraulic hammer 7 passes through the guide block and gradually drives the steel pipe pile to the design elevation. The same method is used to complete the driving of the remaining steel pipe piles in sequence.

[0032] like Figures 1 to 4 As shown, the adjustable diameter pile driving guide cylinder device of the present invention includes: The guide cylinder 1 is located in the lower part of the positioning platform 2, and its layout is based on the planar position of the steel pipe piles of the wind turbine foundation. Figure 1 As shown; In a preferred but non-limiting embodiment of the present invention, the positioning platform 2 is an integral support frame, with the guide cylinder 1 fixed in its lower part, providing an installation foundation and working platform for the guide cylinder 1; The guide cylinder body is a cylindrical structure, and is arranged one-to-one with the planar position of the steel pipe piles of the wind turbine foundation (one guide cylinder for each pile), which is used for vertical guidance of the steel pipe piles and the hydraulic hammer.

[0033] In a preferred but non-limiting embodiment of the present invention, the top of the guide cylinder body has a flared opening.

[0034] For example, the number of steel pipe piles for a wind turbine foundation can be four.

[0035] The guide cylinder is equipped with three layers of guiding devices, such as... Figure 2 and Figure 3 As shown, the three-layer guide device consists of the first layer guide device, the second layer guide device, and the third layer guide device from top to bottom.

[0036] In a preferred but non-limiting embodiment of the present invention, the first layer of guiding device is located on the upper inner side of the guide cylinder 1, near the bottom of the bell mouth of the top of the guide cylinder 1, and is responsible for the initial guidance of the steel pipe pile 6 entering the cylinder and the guidance and limiting of the hydraulic hammer when it enters. The second layer of the guide device is located on the inner side of the middle of the guide cylinder 1, between the upper guide block and the lower guide block. It is the core positioning layer and is responsible for fine-tuning the pile position and retracting to make way when hammering. The third-layer guiding device is located on the lower inner side of the guide cylinder 1, near the bottom outlet of the guide cylinder 1. It is responsible for guiding the lower outlet of the steel pipe pile 6, preventing deviation, and limiting and protecting the hydraulic hammer and clamp.

[0037] In a preferred but non-limiting embodiment of the present invention, both the first-layer guide device and the third-layer guide device are made of steel guide blocks, and the first-layer guide device and the third-layer guide device are respectively made of upper-layer guide block 3 and lower-layer guide block 4.

[0038] In a preferred but non-limiting embodiment of the present invention, the first and third guiding devices have eight guide blocks evenly distributed circumferentially inside the guide cylinder 1. These blocks serve two purposes: firstly, the first guiding device provides initial guidance when the steel pipe pile 6 enters the guide cylinder 1; secondly, the first and third guiding devices guide the hydraulic hammer after it enters the guide cylinder. Simultaneously, the guide blocks act as limiting devices, preventing the steel pipe pile and hydraulic hammer from colliding with the second-layer hydraulic clamps as they pass through the guide cylinder.

[0039] In a preferred but non-limiting embodiment of the present invention, the second-layer guiding device adopts a telescopic hydraulic clamp type, that is, eight hydraulic telescopic clamps 5 are evenly distributed in the circumferential direction inside the guide cylinder 1 for guiding the steel pipe pile 6 during the sinking process. Distance sensors and pressure sensors are installed on the hydraulic telescopic clamps 5 to realize synchronous telescopic function. A remote control system and hydraulic drive device that are communicatively connected to the distance sensors and pressure sensors are arranged on the positioning platform to control the synchronous telescopic extension and retraction of the hydraulic telescopic clamps 5.

[0040] In a preferred but non-limiting embodiment of the present invention, eight clamps extend simultaneously during the lowering of the steel pipe pile. The arc formed by these clamps enables precise positioning of the steel pipe pile, ensuring that the center of the steel pipe pile coincides with the center of the guide cylinder, thereby guaranteeing that the pile position matches the design requirements. Figure 4 As shown.

[0041] When the hydraulic hammer reaches the protection position during the hammering process, the eight hydraulic telescopic clamps retract synchronously to allow the hydraulic hammer to pass through.

[0042] In a preferred but non-limiting embodiment of the present invention, the hydraulic telescopic clamp 5 includes: The hydraulic drive unit and hydraulic telescopic cylinder are connected in communication with the controller, which provide radial telescopic power and can be remotely controlled for telescopic movement; The arc-shaped clamping block, which is connected to the hydraulic telescopic cylinder and serves as the clamp body, fits against the inner wall of the steel pipe pile and tightens or loosens the pile body during telescopic movement. Distance sensors are used to provide real-time feedback on the extension of each clamp body, ensuring that the eight clamp bodies are synchronized. A pressure sensor is used to monitor the clamping force of the hoop body to prevent overloading or uneven loading.

[0043] The remote control system is installed on the positioning platform and is used to uniformly control the synchronous extension or retraction of the eight hydraulic telescopic clamps. The remote control system is a controller.

[0044] When the hydraulic telescopic clamp 5 is extended: 8 arc-shaped clamping blocks together form a circle with an inner diameter that matches the steel pipe pile, clamping and correcting the center of the steel pipe pile.

[0045] When the hydraulic telescopic clamp 5 retracts, its overall inner diameter becomes smaller, smaller than the inner diameter of the upper guide block and the lower guide block, thus not obstructing the hydraulic hammer from passing through the guide cylinder.

[0046] In the initial state, all hydraulic telescopic clamps are fully retracted, awaiting work instructions.

[0047] During the synchronous control of the hydraulic telescopic clamp extension, the remote control system issues an extension command, and all hydraulic telescopic cylinders start extending synchronously. Each distance sensor transmits the extension amount back to the controller in real time. The controller compares the displacement data of the eight hydraulic telescopic clamps in real time, calculates the difference between the displacement data, and pauses the extension of the hydraulic telescopic clamps that extend too quickly; it accelerates the extension of the hydraulic telescopic clamps that extend too slowly until the extension amount error of the eight clamps is ≤ the set value (e.g., ±2mm), so as to achieve uniform circumferential tightening and centering of the pile core. The pressure sensor monitors the pressure in real time, and automatically alarms and stops the machine when the pressure is abnormal, protecting the pile body and equipment.

[0048] During the synchronous control of the hydraulic telescopic clamp retraction, the system issues a retraction command when the hydraulic hammer reaches the protection position. Similarly, the distance sensor transmits the retraction displacement, and the controller performs closed-loop adjustment to ensure that all eight clamps retract synchronously to the set position, with their inner diameter smaller than the inner diameter of the guide block, allowing the hydraulic hammer 7 to pass through without obstruction.

[0049] The beneficial effects of the present invention are as follows, compared with the prior art: 1. The adjustable guide tube device integrates a three-layer positioning system, which can take into account the functions of initial guidance, precise positioning, and hydraulic hammer guidance of steel pipe piles.

[0050] 2. The adjustable guide clamp has synchronous telescopic and precise positioning functions, which can accurately control the center position of the steel pipe pile during the pile driving process, ensuring that the pile position deviation meets the design requirements and guaranteeing the installation quality of the subsequent jacket structure. At the same time, the synchronous telescopic function allows the hydraulic hammer to smoothly pass through the guide cylinder to complete the pile driving operation.

[0051] 3. The pile driver was eliminated from the process source, saving the steps of installation, underwater docking and dismantling of the pile driver. This not only reduced the difficulty of underwater construction, but also reduced safety risks and effectively improved the efficiency of pile driving construction.

[0052] 4. By eliminating the pile driver, the energy loss caused by the long pile driver is avoided, the impact energy requirement of the hydraulic hammer is reduced, the selection of pile driving equipment is easier, the pile driving quality is better controlled, and unnecessary hammering operations are reduced.

[0053] 5. Eliminating the pile driver eliminates the need to manufacture large-sized, heavy pile drivers, reducing the manufacturing, transportation, and storage costs of large components, and reducing the overall construction investment of the project.

[0054] 6. The device is directly integrated on the positioning platform, eliminating the need for additional dedicated storage and lifting facilities for the pile driver and hydraulic hammer. This simplifies the operation process, further reduces additional operation time, and controls construction costs.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A pile driving method without a pile driver using an adjustable diameter pile driving guide tube device, characterized in that, include: Step 1: The hydraulic telescopic clamp 5 inside the guide tube is initially in the retracted state; Step 2: Use a crane ship to lift, turn over and erect the steel pipe piles 6 of the wind turbine foundation, and feed them into the first layer of the guiding device on the positioning platform for initial guidance; Step 3: The steel pipe pile is gradually lowered into the guide cylinder 1. The steel pipe pile is initially positioned by the flared opening at the top of the guide cylinder, the upper guide block, and the lower guide block. Step 4: After the bottom of the steel pipe pile passes the lower guide block, the hydraulic telescopic clamps are extended synchronously through the remote control system and hydraulic drive device on the positioning platform. The center position of the steel pipe pile is adjusted by the thrust of the hydraulic telescopic clamps. The extension amount of each hydraulic telescopic clamp is fed back by the distance sensor to achieve precise positioning of the steel pipe pile and make the steel pipe pile reach the position required by the design. Continue lowering the steel pipe piles to complete their self-sinking; Step 5: The steel pipe pile is driven down by gradually hammering it with a hydraulic hammer. The hydraulic hammer enters the guide cylinder through the upper guide block, and the hydraulic telescopic clamp is controlled to retract synchronously, so that the hydraulic hammer passes through the guide block and then gradually drives the steel pipe pile to the design elevation.

2. An adjustable diameter pile driving guide tube device, characterized in that, include: The guide cylinder is set in the lower part of the positioning platform and is arranged in plan according to the plan position of the steel pipe piles of the wind turbine foundation; The guide cylinder is equipped with three layers of guiding devices, which are arranged from top to bottom as the first layer, the second layer, and the third layer.

3. The adjustable diameter pile driving guide cylinder device according to claim 2, characterized in that, The positioning platform is an integral support frame, with the guide cylinder fixed in its lower part, providing the installation foundation and working platform for the guide cylinder; The guide cylinder body is a cylindrical structure, arranged one-to-one with the planar positions of the steel pipe piles of the wind turbine foundation, and is used for vertical guidance of the steel pipe piles and hydraulic hammer.

4. The adjustable diameter pile driving guide cylinder device according to claim 3, characterized in that, The top of the guide cylinder body has a flared opening.

5. The adjustable diameter pile driving guide cylinder device according to claim 4, characterized in that, The first layer of guiding device is located on the upper inner side of the guide tube, and is responsible for the initial guidance of the steel pipe pile entering the tube and the guidance and limiting of the hydraulic hammer when it enters; The second-layer guide device is located on the inner side of the middle of the guide tube and is responsible for fine-tuning the pile position and retracting to make way when hammering. The third-layer guiding device is located on the lower inner side of the guide cylinder. It is responsible for guiding the lower outlet of the steel pipe pile 6, and at the same time limits and protects the hydraulic hammer and clamp.

6. The adjustable diameter pile driving guide cylinder device according to claim 5, characterized in that, Both the first-layer and third-layer guiding devices use steel guide blocks, with the first-layer guiding device using an upper guide block and the third-layer guiding device using a lower guide block, respectively.

7. The adjustable diameter pile driving guide cylinder device according to claim 6, characterized in that, The first and third guide devices each have eight guide blocks evenly distributed in the circumferential direction inside the guide cylinder 1. On the one hand, the first guide device is used for the initial guidance when the steel pipe pile enters the guide cylinder, and on the other hand, the first and third guide devices are used for the guidance after the hydraulic hammer enters the guide cylinder.

8. The adjustable diameter pile driving guide cylinder device according to claim 7, characterized in that, The second-layer guiding device adopts a telescopic hydraulic clamp type, that is, eight hydraulic telescopic clamps are evenly distributed in the circumferential direction inside the guide cylinder for guiding the steel pipe pile sinking process. Distance sensors and pressure sensors are installed on the hydraulic telescopic clamps to realize synchronous extension and retraction function. A remote control system and hydraulic drive device that are connected to the distance sensors and pressure sensors are arranged on the positioning platform to control the synchronous extension and retraction of the hydraulic telescopic clamps.

9. The adjustable diameter pile driving guide cylinder device according to claim 8, characterized in that, When the steel pipe pile is driven into the ground, eight clamps extend simultaneously. The arc formed by these clamps enables precise positioning of the steel pipe pile, allowing it to reach the position required by the design.

10. The adjustable diameter pile driving guide cylinder device according to claim 9, characterized in that, Hydraulic telescopic clamps include: The hydraulic drive unit and hydraulic telescopic cylinder are connected in communication with the controller, which provide radial telescopic power and can be remotely controlled for telescopic movement; The arc-shaped clamping block, which is connected to the hydraulic telescopic cylinder and serves as the clamp body, fits against the inner wall of the steel pipe pile and tightens or loosens the pile body during telescopic movement. Distance sensors are used to provide real-time feedback on the extension of each clamp body, ensuring that the eight clamp bodies are synchronized. A pressure sensor is used to monitor the clamping force on the hoop body.

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