Multi-degree of freedom adjustable screw pile and method of use

Abstract

The application discloses a multi-degree-of-freedom adjustable screw pile and a use method, relates to the technical field of building foundation anchoring members, and comprises a pile frame, a height adjusting mechanism, a horizontal position adjusting mechanism, an angle adjusting mechanism and a mounting flange. The height adjusting mechanism is detachably connected with the pile frame. The horizontal position adjusting mechanism can be positionally adjusted in two mutually perpendicular directions in a horizontal plane to compensate for horizontal deviation when the pile frame is screwed into a foundation. The output end of the angle adjusting mechanism can be multi-angle inclinedly adjusted relative to the horizontal plane to compensate for angle deviation when the pile frame is screwed into the foundation. The mounting flange is mounted on the output end of the angle adjusting mechanism to realize parallel adhesion of the mounting flange and the butt joint surface of the upper member under the cooperative adjustment of the height adjusting mechanism, the horizontal position adjusting mechanism and the angle adjusting mechanism. The application can realize high-precision and high-adaptability installation.

Description

Technical Field

[0001] This invention relates to the field of building foundation anchoring components, and in particular to a multi-degree-of-freedom adjustable helical pile and its usage method. Background Technology

[0002] Spiral piles, as a common foundation anchoring component, are widely used in the fixed installation of prefabricated structures such as solar photovoltaic brackets, agricultural greenhouses, temporary buildings, billboards, and fences. Traditional spiral piles typically consist of a pile body, spiral blades, and a flange at the top. The flange is fixedly connected to the pile body and used to connect to the superstructure. In actual construction, the spiral pile is driven into the foundation by a pile driver, and the flange, as a load-bearing component, directly bears the rotational and impact loads of the pile driver.

[0003] However, existing helical piles have the following technical problems during use: First, due to the complex and variable soil conditions, it is difficult to ensure that the flanges of multiple helical piles are at the same horizontal level during the piling process. Even with control of the screw-in depth using a piling machine, the final installation height of the flanges still deviates due to factors such as uneven geological conditions and operational errors. Because the flanges are fixedly connected to the pile body, height adjustment is not possible, leading to difficulties in installing the superstructure and even requiring readjustment of the pile positions, thus affecting construction efficiency and installation accuracy.

[0004] Secondly, the horizontal orientation of the flanges on existing helical piles is usually fixed. In actual installation, the connection holes of the upper components may not be precisely aligned with the flange holes. If the horizontal position of the flange cannot be adjusted, it is necessary to adapt it by adding adapters or re-drilling holes, which increases the complexity of construction and structural safety hazards.

[0005] Secondly, some applications have specific requirements for the tilt angle of the flange. For example, photovoltaic supports need to adjust their tilt direction according to the angle of solar incidence. The flanges of existing helical ground piles cannot achieve angle adjustment, making it difficult to meet the installation requirements under different working conditions and limiting their applicability.

[0006] In summary, existing helical piles still have significant shortcomings in terms of adjusting the installation height, horizontal position, and tilt angle of the flange. There is an urgent need to provide a helical pile with a reasonable structure, flexible adjustment, and reliable locking to meet the requirements of modern prefabricated buildings for high-precision and highly adaptable installation of foundation components. Summary of the Invention

[0007] The purpose of this invention is to provide a multi-degree-of-freedom adjustable helical ground pile and its usage method, so as to solve the shortcomings of existing helical ground piles in terms of flange installation height, horizontal position and tilt angle adjustment, and to achieve high-precision and highly adaptable installation.

[0008] To achieve the above objectives, the present invention provides the following solution: This invention provides a multi-degree-of-freedom adjustable helical ground pile, comprising: a ground pile frame, a height adjustment mechanism, a horizontal position adjustment mechanism, an angle adjustment mechanism, and a mounting flange. The lower part of the ground pile frame is provided with a helical wedge for screwing into the foundation. The bottom end of the height adjustment mechanism is detachably connected to the top end of the ground pile frame, and the height adjustment mechanism can adjust the height of its own top end relative to the top end of the ground pile frame. The horizontal position adjustment mechanism is installed at the top end of the height adjustment mechanism, and the horizontal position adjustment mechanism can be adjusted in two mutually perpendicular directions in the horizontal plane to compensate for horizontal deviation when the ground pile frame is screwed into the foundation. The angle adjustment mechanism is located at the top end of the horizontal position adjustment mechanism, and the output end of the angle adjustment mechanism can be tilted at multiple angles relative to the horizontal plane to compensate for angular deviation when the ground pile frame is screwed into the foundation. The mounting flange is installed at the output end of the angle adjustment mechanism to achieve parallel contact between the mounting flange and the mating surface of the upper component under the coordinated adjustment of the height adjustment mechanism, the horizontal position adjustment mechanism, and the angle adjustment mechanism.

[0009] Preferably, the height adjustment mechanism is a lifting sleeve, which has a threaded blind hole, and the top end of the ground pile frame is provided with an external thread. The lifting sleeve is used to connect with the top end of the ground pile frame to achieve height adjustment.

[0010] Preferably, the horizontal position adjustment mechanism includes a mounting block, a rectangular slider, a connecting rod, and multiple adjusting components. The mounting block is fixedly connected to the top end of the lifting sleeve. A rectangular groove is provided inside the mounting block, and a movable through hole communicating with the rectangular groove is provided on the top surface of the mounting block. The rectangular slider is slidably connected to the rectangular groove. Each adjusting component is arranged along the circumference of the mounting block. The adjusting component is slidably connected to the mounting block and can maintain its position after sliding. One end of each adjusting component extends into the rectangular groove to abut against the rectangular slider to maintain the position of the rectangular slider within the rectangular groove. The connecting rod passes through the movable through hole and is fixedly connected to the rectangular slider. The top end of the connecting rod is used to connect to the angle adjustment mechanism.

[0011] Preferably, the mounting block has a square structure, and the adjusting members are evenly arranged along the circumference of the mounting block, with at least two adjusting members provided on each side of the mounting block.

[0012] Preferably, the adjusting component is an adjusting bolt, and the side wall of the mounting block is provided with a threaded hole communicating with the rectangular slide groove. The adjusting bolt is used to thread into the threaded hole and to make one end of the adjusting bolt extending into the rectangular slide groove abut against the side wall of the rectangular slider.

[0013] Preferably, the angle adjustment mechanism is a spherical hinge, which includes a ball seat, a ball head, and a locking assembly. The ball seat is fixedly connected to the top end of the connecting rod, the ball head is rotatably connected to the spherical cavity of the ball seat, and the top of the ball head extends out of the ball seat and is fixedly connected to the mounting flange. The locking assembly is disposed on the outer periphery of the ball seat and is used to lock and fix the position of the ball head after the ball head is rotated to the target angle.

[0014] Preferably, the locking assembly includes a plurality of locking bolts, and the sidewall of the ball seat is provided with a plurality of locking screw holes that communicate with the spherical cavity evenly in the circumferential direction. Each locking bolt is used to be threadedly connected to the corresponding locking screw hole, and one end of the locking bolt extending into the spherical cavity is used to abut against and lock the outer spherical surface of the ball head.

[0015] Preferably, the outer spherical surface of the ball head is provided with anti-slip texture or anti-slip coating to increase the frictional locking force between the locking bolt and the ball head.

[0016] Preferably, the top of the pile frame is provided with a limiting hole, which is used to engage with the output end of the pile driver to transmit torque and realize the screwing-in construction of the pile frame. The pile frame is provided with a grouting channel inside, the grout inlet of the grouting channel is the limiting hole, and the grout outlet of the grouting channel is the conical end at the bottom of the pile frame.

[0017] The present invention also provides a method for using a multi-degree-of-freedom adjustable helical ground pile as described in any of the preceding claims, comprising the following steps: The pile frame is driven into the foundation to the designed depth by a pile driver. During the driving process, the spiral blades enable self-drilling, and the torque is transmitted through the locking engagement between the limiting hole and the output end of the pile driver. Based on the actual screw-in state of the pile frame, the vertical height of the mounting flange is adjusted by the height adjustment mechanism to compensate for the height deviation between the top of the pile frame and the design elevation. The horizontal position of the mounting flange is adjusted in two mutually perpendicular directions in the horizontal plane by the horizontal position adjustment mechanism to compensate for the horizontal positioning deviation when the ground pile frame is screwed in. The angle adjustment mechanism adjusts the tilt angle of the mounting flange relative to the horizontal plane to compensate for the angle deviation when the ground pile frame is screwed in. After the height adjustment mechanism, the horizontal position adjustment mechanism and the angle adjustment mechanism are adjusted in a coordinated manner, the installation of the helical pile is completed by fixing it to the upper component through the mounting flange.

[0018] The present invention achieves the following technical effects compared to the prior art: This invention provides a multi-degree-of-freedom adjustable spiral ground pile and its usage method. By sequentially setting a height adjustment mechanism, a horizontal position adjustment mechanism, and an angle adjustment mechanism at the top of the ground pile frame, the independent adjustment and coordinated operation of the mounting flange in three degrees of freedom—vertical height, horizontal position, and tilt angle—is realized.

[0019] The spiral ground pile of this invention has a compact structure, flexible adjustment, and reliable locking, which can meet the requirements of high-precision installation and rapid construction of foundation components for prefabricated buildings such as solar photovoltaic brackets and agricultural greenhouses. It has good engineering application value and promotion prospects. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of the multi-degree-of-freedom adjustable spiral pile provided by the present invention; Figure 2 This is a structural cross-sectional view of the multi-degree-of-freedom adjustable helical pile provided by the present invention; Figure 3 A front sectional view of the multi-degree-of-freedom adjustable helical ground pile provided by the present invention; Figure 4 This is a schematic cross-sectional view of the structure of the pile frame in the multi-degree-of-freedom adjustable helical pile provided by the present invention; In the diagram: 1. Ground pile frame; 11. Spiral jack; 12. Limiting hole; 13. Grout outlet; 14. External thread; 2. Lifting sleeve; 3. Horizontal position adjustment mechanism; 31. Mounting block; 32. Rectangular slider; 33. Connecting rod; 34. Adjusting bolt; 4. Angle adjustment mechanism; 41. Ball seat; 42. Ball head; 43. Locking bolt; 5. Mounting flange. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] The purpose of this invention is to provide a multi-degree-of-freedom adjustable helical ground pile and its usage method, so as to solve the shortcomings of existing helical ground piles in terms of flange installation height, horizontal position and tilt angle adjustment, and to achieve high-precision and highly adaptable installation.

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] This invention provides a multi-degree-of-freedom adjustable helical ground pile, such as Figures 1-4 As shown, the system includes: a ground pile frame 1, a height adjustment mechanism, a horizontal position adjustment mechanism 3, an angle adjustment mechanism 4, and a mounting flange 5. The lower part of the ground pile frame 1 is equipped with a spiral wrench 11 for screwing into the foundation. The bottom end of the height adjustment mechanism is detachably connected to the top end of the ground pile frame 1, and the height adjustment mechanism can adjust the height of its own top end relative to the top end of the ground pile frame 1. The horizontal position adjustment mechanism 3 is installed at the top of the height adjustment mechanism, and the horizontal position adjustment mechanism 3 can adjust its position in two mutually perpendicular directions in the horizontal plane to compensate for the horizontal deviation when the ground pile frame 1 is screwed into the foundation. The angle adjustment mechanism 4 is located at the top of the horizontal position adjustment mechanism 3, and the output end of the angle adjustment mechanism 4 can be tilted at multiple angles relative to the horizontal plane to compensate for the angular deviation when the ground pile frame 1 is screwed into the foundation. The mounting flange 5 is installed at the output end of the angle adjustment mechanism 4, so that, under the coordinated adjustment of the height adjustment mechanism, the horizontal position adjustment mechanism 3, and the angle adjustment mechanism 4, the mounting flange 5 and the mating surface of the upper component can be parallelly fitted. The overall structural design gives the spiral ground pile a multi-degree-of-freedom adjustment function. The pile frame 1 is easily screwed into the foundation via the spiral hinge 11, providing stable support for the entire pile. The height adjustment mechanism can flexibly adjust the vertical height of the mounting flange 5, the horizontal position adjustment mechanism 3 can accurately compensate for horizontal deviations in the plane, and the angle adjustment mechanism 4 can adjust the tilt angle. The three work together to ensure that the mounting flange 5 can be precisely parallel and fitted to the mating surface of the upper component, greatly improving the adaptability and stability of the connection between the spiral pile and the upper structure, and meeting the requirements of different construction scenarios and projects.

[0026] In a preferred embodiment, the height adjustment mechanism is a lifting sleeve 2. The lifting sleeve 2 has a threaded blind hole, and the top of the pile frame 1 is provided with an external thread 14. The lifting sleeve 2 is used to connect with the top of the pile frame 1 to achieve height adjustment. The method of connecting the lifting sleeve 2 with the top of the pile frame 1 by thread is simple in structure and convenient in adjustment. By rotating the lifting sleeve 2, the height of its top relative to the top of the pile frame 1 can be easily and accurately changed, thereby quickly adjusting the vertical height of the mounting flange 5. This effectively solves the problem of inconsistent pile top height caused by differences in foundation soil or construction errors, and improves installation efficiency and accuracy.

[0027] In a preferred embodiment, a locking bolt is also included. The outer wall of the lifting sleeve 2 is provided with a threaded hole that corresponds to the threaded blind hole. The locking bolt is used to connect with the threaded hole and abut against the top external thread 14 of the pile frame 1 to fix its position after the lifting sleeve 2 is adjusted to the target height, so as to prevent the height change caused by the loosening of the thread due to vibration or load during use.

[0028] In a preferred embodiment, the horizontal position adjustment mechanism 3 includes a mounting block 31, a rectangular slider 32, a connecting rod 33, and multiple adjusting components. The mounting block 31 is fixedly connected to the top of the lifting sleeve 2. A rectangular groove is provided inside the mounting block 31, and a movable through hole communicating with the rectangular groove is provided on the top surface of the mounting block 31. The rectangular slider 32 is slidably connected to the rectangular groove. Each adjusting component is arranged along the circumference of the mounting block 31. The adjusting component is slidably connected to the mounting block 31 and can maintain its position after sliding. One end of each adjusting component extends into the rectangular groove and is used to abut against the rectangular slider 32 to maintain the position of the rectangular slider 32 in the rectangular groove. The connecting rod 33 passes through the movable through hole and is fixedly connected to the rectangular slider 32. The top end of the connecting rod 33 is used to connect with the angle adjustment mechanism 4. The design of this horizontal position adjustment mechanism 3 makes the position adjustment of the mounting flange 5 in the horizontal plane flexible and precise. The rectangular slider 32 slides within the rectangular groove, and combined with the circumferentially arranged adjusting piece, the position of the rectangular slider 32 can be finely adjusted in two mutually perpendicular directions. This, in turn, allows for precise adjustment of the horizontal position of the mounting flange 5 via the connecting rod 33. This structure effectively compensates for horizontal deviations caused when the pile frame 1 is screwed into the foundation, ensuring accurate alignment of the mounting flange 5 with the connecting holes of the upper component, and avoiding connection difficulties or structural instability caused by horizontal position deviations.

[0029] In a preferred embodiment, the mounting block 31 has a square structure, with all adjusting members evenly distributed along its circumference. Each side of the mounting block 31 has at least two adjusting members. The square structure and evenly distributed adjusting members ensure balanced and stable adjustment in all directions on the horizontal plane. The presence of at least two adjusting members on each side allows for more precise adjustment of the rectangular slider 32, enabling more accurate adjustment of the mounting flange 5's position on the horizontal plane. This further improves the accuracy and reliability of horizontal position adjustment, adapting to various complex horizontal position adjustment needs.

[0030] In a preferred embodiment, the adjusting component is an adjusting bolt 34. The side wall of the mounting block 31 has a threaded hole communicating with the rectangular slide groove. The adjusting bolt 34 is threaded into the threaded hole, and one end of the adjusting bolt 34 extending into the rectangular slide groove abuts against the side wall of the rectangular slider 32. The engagement between the adjusting bolt 34 and the threaded hole makes the adjustment process simple and precise. By rotating the adjusting bolt 34, its length extending into the rectangular slide groove can be easily controlled, thereby precisely pushing or fixing the position of the rectangular slider 32. This method not only provides flexible adjustment but also ensures that the adjusting bolt 34 reliably maintains the position of the rectangular slider 32 after adjustment, providing stable horizontal support for the mounting flange 5.

[0031] In a preferred embodiment, the angle adjustment mechanism 4 is a spherical hinge, comprising a ball seat 41, a ball head 42, and a locking assembly. The ball seat 41 is fixedly connected to the top of the connecting rod 33, and the ball head 42 is rotatably connected to the spherical cavity of the ball seat 41. The top of the ball head 42 extends out of the ball seat 41 and is fixedly connected to the mounting flange 5. The locking assembly is located on the outer periphery of the ball seat 41 and is used to lock and fix the position of the ball head 42 after it rotates to the target angle. The design of the spherical hinge provides the mounting flange 5 with multi-angle tilt adjustment capability. The ball head 42 can rotate flexibly within the spherical cavity of the ball seat 41, enabling rapid adjustment to the required tilt angle to compensate for the angle deviation when the pile frame 1 is screwed into the foundation. The locking assembly can reliably fix the position of the ball head 42 after it rotates to the target angle, ensuring that the mounting flange 5 maintains a stable tilt angle during use and meeting the specific requirements for the tilt angle of the mounting flange 5 under different working conditions.

[0032] In a preferred embodiment, the locking assembly includes multiple locking bolts 43. The sidewall of the ball seat 41 has multiple locking screw holes evenly distributed circumferentially, communicating with the spherical cavity. Each locking bolt 43 is threaded into its corresponding locking screw hole, and one end of the locking bolt 43 extending into the spherical cavity is used to abut and lock against the outer spherical surface of the ball head 42. The multiple evenly distributed locking bolts 43, in conjunction with the locking screw holes on the ball seat 41, can lock the ball head 42 from multiple directions, ensuring its secure fixation at the target angle. This design enhances the locking reliability of the angle adjustment mechanism 4, ensuring that the tilt angle of the mounting flange 5 remains unchanged under various external forces, thus guaranteeing the stability and safety of the connection between the helical pile and the upper component.

[0033] In a preferred embodiment, the outer spherical surface of the ball head 42 is provided with anti-slip textures or an anti-slip coating to increase the frictional locking force between the locking bolt 43 and the ball head 42. The anti-slip textures or anti-slip coating further improve the frictional force between the locking bolt 43 and the ball head 42, making the connection between the ball head 42 and the locking bolt 43 more stable under the same locking force. This effectively prevents the ball head 42 from rotating due to vibration, external forces, or other factors during use, further improving the reliability and stability of the angle adjustment mechanism 4 and ensuring the accuracy and durability of the tilt angle of the mounting flange 5.

[0034] In a preferred embodiment, the top of the pile frame 1 is provided with a limiting hole 12, which is used to engage with the output end of the pile driver to transmit torque and enable the pile frame 1 to be screwed into the ground. The pile frame 1 has an internal grouting channel, with the limiting hole 12 as the inlet and the tapered end 13 as the outlet. The engaging design between the limiting hole 12 and the output end of the pile driver ensures that the pile driver can stably transmit torque to the pile frame 1 during the screwing-in process, allowing the pile frame 1 to be smoothly screwed into the foundation, improving construction efficiency and the accuracy of the pile frame 1's screwing-in. Simultaneously, the grouting channel design inside the pile frame 1, by injecting grout from the top limiting hole 12 and allowing it to flow out from the bottom tapered end, can fill the soil gaps around the pile frame 1, enhancing the bond between the pile frame 1 and the foundation, further improving the bearing capacity and stability of the pile, and meeting the engineering requirements under different geological conditions.

[0035] Example 2 The present invention also provides a method for using a multi-degree-of-freedom adjustable helical ground pile as described in any of the above claims, comprising the following steps: 1. Construction preparation: Materials and Equipment Inspection: Confirm that all components of the multi-degree-of-freedom adjustable helical pile are intact and undamaged. For example, the helical flap 11 of the pile frame 1 is free from deformation and damage, the threads of the lifting sleeve 2 are undamaged, and all parts of the horizontal position adjustment mechanism 3 and the angle adjustment mechanism 4 are securely connected. At the same time, check that the piling machine and grouting equipment are functioning normally to ensure that the equipment will not malfunction during construction.

[0036] Site survey and measurement: Conduct a site survey to understand the geological conditions and mark the design locations of the ground piles. Use surveying tools (such as levels, theodolites, etc.) to measure the flatness and design elevation of the site, providing benchmark data for subsequent ground pile installation.

[0037] 2. Ground pile frame 1 is screwed into the foundation: Connecting the pile driver: Connect the limiting hole 12 at the top of the pile frame 1 to the output end of the pile driver to ensure a firm connection and effective torque transmission.

[0038] Piling Operation: Start the pile driver so that the pile frame 1 can self-drill into the foundation under the action of the spiral wrench 11. During the drilling process, closely monitor the verticality and drilling depth of the pile frame 1. This can be done in real time using a level and depth measuring tools to ensure that the pile frame 1 is drilled to the designed depth.

[0039] 3. Grouting reinforcement (optional step): Preparation for grouting: If the project requires grouting reinforcement of the foundation, connect the grouting equipment and connect the grouting pipe to the limiting hole 12 at the top of the pile frame 1.

[0040] Grouting operation: Start the grouting equipment to allow the grout to flow out from the conical end at the bottom of the pile frame 1 through the grouting channel, filling the soil gaps around the pile frame 1. During the grouting process, pay attention to controlling the grouting pressure and grouting volume to ensure uniform and sufficient grouting, thereby enhancing the bonding force between the pile frame 1 and the foundation.

[0041] 4. Height adjustment: Install the height adjustment mechanism, horizontal position adjustment mechanism 3, angle adjustment mechanism 4 and mounting flange 5 on the ground pile frame 1 that has been screwed into the foundation; Measurement of height deviation: After the ground pile frame 1 is screwed in, use a level to measure the height deviation between the top of the installation flange 5 and the design elevation; Height Adjustment: Based on the measured height deviation, adjust the height of the lifting sleeve 2 relative to the top of the ground pile frame 1 by rotating it. If the height is too low, rotate the lifting sleeve 2 clockwise to raise it; if the height is too high, rotate it counterclockwise to lower it until the mounting flange 5 reaches the design elevation position.

[0042] 5. Horizontal position adjustment: Measure horizontal deviation: Use a theodolite to measure the horizontal deviation of the mounting flange 5 in the horizontal plane along two mutually perpendicular directions (such as the X-axis and Y-axis).

[0043] Adjusting the horizontal position: Based on the measurement results, adjust the position of the rectangular slider 32 within the rectangular groove by rotating the adjusting bolt 34 on the side of the mounting block 31. For example, if the mounting flange 5 is offset to the left in the X-axis direction, rotate the adjusting bolt 34 on the corresponding side to push the rectangular slider 32 to the right, thereby moving the connecting rod 33 and the mounting flange 5 to the right until the mounting flange 5 is positioned correctly in the X-axis direction. Similarly, adjust the Y-axis direction to compensate for the horizontal positioning deviation caused when the ground pile frame 1 is screwed in.

[0044] 6. Angle adjustment: Measure the angular deviation: Use an inclinometer to measure the tilt angle deviation of the mounting flange 5 relative to the horizontal plane.

[0045] Adjusting the tilt angle: Based on the measured angle deviation, rotate the ball head 42 of the angle adjustment mechanism 4 to bring the mounting flange 5 to the target tilt angle. During rotation, the angle change can be monitored in real time by an inclinometer. Once the target angle is reached, tighten the locking bolts 43 on the outer periphery of the ball seat 41 to ensure tight contact with the outer spherical surface of the ball head 42. Utilize the anti-slip texture or anti-slip coating on the outer spherical surface of the ball head 42 to increase friction, firmly locking the position of the ball head 42 and ensuring the tilt angle of the mounting flange 5 is fixed.

[0046] 7. Connection with the upper components: Check the adjustment results: After the height, horizontal position and angle are adjusted, use measuring tools again to check the parallelism and fit between the mounting flange 5 and the mating surface of the upper component to ensure that all adjustments meet the design requirements.

[0047] Fixed connection: After confirming that everything is correct, use bolts, welding or other suitable fixing methods to firmly connect the upper component to the mounting flange 5 through the connection holes on the mounting flange 5, and complete the installation of the helical ground pile.

[0048] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A multi-degree-of-freedom adjustable helical ground pile, characterized in that: include: A ground pile frame, the lower part of which is provided with a spiral wedge for screwing into the foundation; A height adjustment mechanism, the bottom end of which is detachably connected to the top end of the ground pile frame, and the height adjustment mechanism is capable of adjusting the height of its own top end relative to the top end of the ground pile frame. A horizontal position adjustment mechanism is installed at the top of the height adjustment mechanism, and the horizontal position adjustment mechanism can be adjusted in two mutually perpendicular directions in the horizontal plane to compensate for the horizontal deviation when the ground pile frame is screwed into the foundation. An angle adjustment mechanism is provided at the top of the horizontal position adjustment mechanism, and the output end of the angle adjustment mechanism can be tilted at multiple angles relative to the horizontal plane to compensate for the angle deviation when the ground pile frame is screwed into the foundation. as well as The mounting flange is installed at the output end of the angle adjustment mechanism to achieve parallel fit between the mounting flange and the mating surface of the upper component under the coordinated adjustment of the height adjustment mechanism, the horizontal position adjustment mechanism and the angle adjustment mechanism.

2. The multi-degree-of-freedom adjustable helical pile according to claim 1, characterized in that: The height adjustment mechanism is a lifting sleeve with a threaded blind hole. The top of the ground pile frame is provided with an external thread. The lifting sleeve is used to connect with the top of the ground pile frame to achieve height adjustment.

3. The multi-degree-of-freedom adjustable helical pile according to claim 2, characterized in that: The horizontal position adjustment mechanism includes a mounting block, a rectangular slider, a connecting rod, and multiple adjusting components. The mounting block is fixedly connected to the top end of the lifting sleeve. A rectangular groove is provided inside the mounting block, and a movable through hole communicating with the rectangular groove is provided on the top surface of the mounting block. The rectangular slider is slidably connected to the rectangular groove. Each adjusting component is arranged along the circumference of the mounting block. The adjusting component is slidably connected to the mounting block and can maintain its position after sliding. One end of each adjusting component extends into the rectangular groove to abut against the rectangular slider to maintain the position of the rectangular slider within the rectangular groove. The connecting rod passes through the movable through hole and is fixedly connected to the rectangular slider. The top end of the connecting rod is used to connect to the angle adjustment mechanism.

4. The multi-degree-of-freedom adjustable helical pile according to claim 3, characterized in that: The mounting block has a square structure, and the adjusting members are evenly arranged along the circumference of the mounting block, with at least two adjusting members provided on each side of the mounting block.

5. The multi-degree-of-freedom adjustable helical pile according to claim 4, characterized in that: The adjusting component is an adjusting bolt. The side wall of the mounting block is provided with a threaded hole that communicates with the rectangular slide groove. The adjusting bolt is used to thread into the threaded hole and to make one end of the adjusting bolt extending into the rectangular slide groove abut against the side wall of the rectangular slider.

6. The multi-degree-of-freedom adjustable helical pile according to claim 5, characterized in that: The angle adjustment mechanism is a spherical hinge, which includes a ball seat, a ball head, and a locking assembly. The ball seat is fixedly connected to the top end of the connecting rod, and the ball head is rotatably connected to the spherical cavity of the ball seat. The top of the ball head extends out of the ball seat and is fixedly connected to the mounting flange. The locking assembly is disposed on the outer periphery of the ball seat and is used to lock and fix the position of the ball head after it rotates to the target angle.

7. The multi-degree-of-freedom adjustable helical pile according to claim 6, characterized in that: The locking assembly includes multiple locking bolts. The sidewall of the ball seat is evenly provided with multiple locking screw holes that communicate with the spherical cavity. Each locking bolt is used to be threadedly connected to the corresponding locking screw hole, and one end of the locking bolt extending into the spherical cavity is used to abut against and lock the outer spherical surface of the ball head.

8. The multi-degree-of-freedom adjustable helical pile according to claim 7, characterized in that: The outer spherical surface of the ball head is provided with anti-slip texture or anti-slip coating to increase the frictional locking force between the locking bolt and the ball head.

9. The multi-degree-of-freedom adjustable helical pile according to claim 8, characterized in that: The top of the pile frame is provided with a limiting hole, which is used to engage with the output end of the pile driver to transmit torque and realize the screwing-in construction of the pile frame. The inside of the pile frame is provided with a grouting channel, the grout inlet of the grouting channel is the limiting hole, and the grout outlet of the grouting channel is the conical end at the bottom of the pile frame.

10. A method of using a multi-degree-of-freedom adjustable helical ground pile as described in any one of claims 1 to 9, characterized in that: Includes the following steps: The pile frame is driven into the foundation to the designed depth by a pile driver. During the driving process, the spiral blades enable self-drilling, and the torque is transmitted through the locking engagement between the limiting hole and the output end of the pile driver. Based on the actual screw-in state of the pile frame, the vertical height of the mounting flange is adjusted by the height adjustment mechanism to compensate for the height deviation between the top of the pile frame and the design elevation. The horizontal position of the mounting flange is adjusted in two mutually perpendicular directions in the horizontal plane by the horizontal position adjustment mechanism to compensate for the horizontal positioning deviation when the ground pile frame is screwed in. The angle adjustment mechanism adjusts the tilt angle of the mounting flange relative to the horizontal plane to compensate for the angle deviation when the ground pile frame is screwed in. After the height adjustment mechanism, the horizontal position adjustment mechanism and the angle adjustment mechanism are adjusted in a coordinated manner, the installation of the helical pile is completed by fixing it to the upper component through the mounting flange.

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