A soft soil pile foundation ring cutting device
By designing a soft soil pile foundation circumferential cutting device with a pile top fixing component, a circumferential sliding platform, and a mobile frame, the problems of inconvenient movement, poor safety, and unsatisfactory cutting effect of existing devices have been solved, achieving a stable, safe, and efficient circumferential cutting effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA RAILWAY NO 3 GRP CO LTD
- Filing Date
- 2026-03-13
- Publication Date
- 2026-06-05
AI Technical Summary
Existing soft soil pile foundation circumferential cutting devices have limited functionality, are inconvenient to move, have poor safety, and their cutting effect is greatly affected by the verticality of the pile body, making it difficult to achieve horizontal cutting.
A circumferential cutting device was designed, comprising a pile top fixing component, a circumferential sliding platform, and a moving frame. The pile head is clamped by gravity support, and combined with leveling knobs and connectors, automatic support, leveling, and movement are achieved, ensuring the stability and levelness of the cutting machine.
It improves the mobility and safety of circumferential cutting equipment, ensures that the cutting machine operates in a horizontal position to avoid damage, and enhances cutting effect and construction efficiency.
Smart Images
Figure CN122147875A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of pile head circumferential cutting technology, and more specifically to a soft soil pile foundation circumferential cutting device. Background Technology
[0002] Soft soil pile foundation circumferential cutting technology is a landmark technique in modern, refined foundation engineering construction, primarily applied in critical projects with stringent requirements for foundation bearing capacity, settlement control, and construction quality. Circumferential cutting of soft soil pile foundations is a crucial and sophisticated construction process. Its core purpose goes far beyond simply "cutting off" the pile; it aims to precisely and efficiently remove excess material from the pile head in subsequent processes, ensuring a safe, reliable, and efficient load-bearing connection between the pile foundation and the superstructure (such as pile caps and foundation beams).
[0003] Due to the characteristics of soft soil foundations and the influence of construction sequence, the "surface" is usually not, and often cannot, be completely leveled before cutting the pile head of soft soil piles (such as CFG piles and cast-in-place piles). Instead, other technical means are used to ensure the stability of the cutting benchmark. This means that in soft soil, the entry of large machinery for circumferential cutting may disturb the soil around the pile, or even cause the pile to break due to collision. Therefore, currently, only simple circumferential cutting devices can be used for circumferential cutting operations of soft soil pile foundations.
[0004] The existing simple circumferential cutting device has a single function, mainly consisting of a cutting machine and a clamp rotatably mounted on one side of the cutting machine. In use, it relies on manual handling to put the clamp onto the pile head and then lock the clamp, which has the following drawbacks: (1) It lacks effective mobility. It requires manual lifting when moving and manual lifting of the cutting machine is required when setting the pile. The clamp is locked to the outside of the pile body, which is inconvenient to use. (2) Relying on a single clamp for locking, the cutting machine is prone to falling and damaging the cutting blade under the large torque and vibration of the cutting, which poses a safety hazard; (3) When the pile body is tilted, the cutting groove follows the tilt of the pile body, making it difficult to cut a horizontal groove. The cutting effect is greatly affected by the verticality of the pile body. In view of this, this application provides a device for circumferential cutting of soft soil pile foundations. Summary of the Invention
[0005] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this disclosure provides a soft soil pile foundation circumferential cutting device.
[0006] To achieve the aforementioned objectives, the present invention provides a soft soil pile foundation circumferential cutting device, comprising: A pile top fixing assembly includes a strut and an arc-shaped clamp. The strut is used to support the top surface of the pile head, and multiple clamps are equidistantly arranged circumferentially on the side of the strut. The clamps are configured to clamp onto the side of the pile head when moved toward the center of the pile head. A circumferential sliding platform includes an annular plate, an annular sliding block, and leveling knobs. The inner diameter of the annular plate is larger than the outer diameter of the pile top fixing component. The annular sliding block is slidably sleeved on the annular plate. Multiple leveling knobs are provided between the annular plate and the pile top fixing component. The leveling knobs are used to suspend the annular sliding platform on the pile top fixing component and can adjust the annular sliding platform to a horizontal state. A movable frame, located on the side of the pile head being cut, includes a movable seat for displacement on the ground and a connector disposed on top of the movable seat. The circumferential sliding seat is connected to the connector, and the connector is capable of adjusting the height of the circumferential sliding platform and the pile top fixing assembly. The cutting machine can move synchronously in both the height and circumferential directions via the connecting member and the circumferential slide block, and the cutting machine can swing around the connecting member as the center.
[0007] Optionally, the pile top fixing assembly further includes a collar, a telescopic arm, and a connecting rod. The collar is slidably sleeved on the outside of the support rod. The clamp is fixedly installed on the movable end of the telescopic arm. The fixed end of the telescopic arm is fixedly connected to the side of the collar. The two ends of the connecting rod are rotatably connected to the movable end of the telescopic arm and the support rod, respectively, for pulling the movable end of the telescopic arm toward the center of the pile head when the support rod moves upward.
[0008] Optionally, an upper rotating ball is rotatably mounted on the fixed end of the telescopic arm, a lower rotating ball is rotatably mounted on the annular plate, the leveling knob is a screw, the bottom end of the leveling knob is rotatably engaged with the top of the lower rotating ball, the leveling knob passes through the upper rotating ball, and the leveling knob is threadedly engaged with the upper rotating ball.
[0009] Optionally, the upper and lower sides of the upper rotating ball are provided with pile-side locking nuts, and the pile-side locking nuts are threadedly engaged with the leveling knob.
[0010] Optionally, the pile top fixing assembly further includes a pile top locking nut, the support rod is a screw rod, the pile top locking nut is threaded on the outside of the support rod, and the pile top locking nut is located on the upper side of the collar. The pile top locking nut locks the support rod in the highest position by supporting it on the top of the collar.
[0011] Optionally, the clamping plate includes an upper plate for supporting the top edge of the pile head and a side plate for supporting the side of the pile head. When the side plate is fully attached to the side of the pile head, the multiple clamping plates are connected end to end in the circumferential direction.
[0012] Optionally, the circumferential slide includes a sleeve, an arc plate, and a pulley. The sleeve is connected to the connector. The arc plate is fixedly sleeved on the top and bottom ends of the sleeve. One pulley is provided at each end of the two arc plates on opposite sides. The two arc plates are located on the upper and lower sides of the annular plate, respectively, and the pulley slides in cooperation with the annular plate.
[0013] Optionally, the annular plate includes an outer ring plate, a middle ring plate, and an inner ring plate distributed sequentially from the outside to the inside. The annular plate has annular grooves on both the upper and lower sides of the middle ring plate. The pulley is located in the annular groove. The leveling knob is located between the inner ring plate and the pile top fixing assembly.
[0014] Optionally, the connecting member includes a lead screw and ear plates. The bottom end of the lead screw is rotatably engaged with the movable seat. Two ear plates are threaded on the outside of the lead screw, and the two ear plates are fixedly connected to the cutting machine. The annular slide is located between the two ear plates in the height direction.
[0015] Optionally, the connector further includes pin holes and a pin. Several pin holes are provided on the lead screw. The pin can be inserted into the pin holes. When the cutting machine is at the highest position of the lead screw, the pin can be supported at the bottom of the lower ear plate by inserting into the highest pin hole located below the cutting machine. When the cutting machine is at the lowest position of the lead screw, the pin can be supported at the top of the upper ear plate by inserting into the lowest pin hole located above the cutting machine.
[0016] The technical solution provided in this disclosure has the following advantages compared with the prior art: (1) By setting up a mobile frame, it is easier to move the circumferential cutting equipment between different pile heads. Compared with the existing technology that relies on manual hand-held transfer, this application is more convenient to use.
[0017] (2) By setting up a pile top fixing component, the gravity of the circumferential cutting equipment is used to automatically support and clamp the pile head. During the circumferential cutting operation, the cutting machine can be effectively prevented from falling and the cutting blade can be avoided. Compared with the prior art, which relies on a single clamp to hold the outside of the pile body, this application is safer and has a better cutting effect.
[0018] (3) By setting up a circumferential sliding platform, the cutting machine can be leveled on the fixed component at the top of the pile, thereby achieving the leveling effect of the cutting machine. Compared with the prior art, where the cutting machine is directly affected by the verticality of the pile when it is held tightly to the outside of the pile by a single clamp, this application can ensure that the cutting machine cuts in a horizontal state, thereby improving the cutting effect.
[0019] (4) By coordinating the lifting and lowering of the mobile frame, the lifting and lowering of the pile top fixing component and the lifting and lowering of the circumferential sliding platform, the mobile frame can be lifted off the ground while the pile top fixing component is fixed to the pile head, thereby avoiding the impact of uneven ground on the cutting machine during the circumferential cutting operation and improving the cutting effect. Attached Figure Description
[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the soft soil pile foundation circumferential cutting device of the present invention during circumferential cutting operation; Figure 2 This is the present invention. Figure 1 Enlarged view of point A in the middle; Figure 3 This is the present invention. Figure 1 Enlarged view at point B in the middle; Figure 4 This is the present invention. Figure 1 A schematic diagram of the soft soil pile foundation circumferential cutting device; Figure 5 This is a schematic diagram of the structure of the pile top fixing component of the present invention; Figure 6 This is a partially disassembled schematic diagram of the circumferential sliding platform of the present invention; Figure 7 This is a structural schematic diagram of the movable frame and connecting parts of the present invention.
[0022] The components include: 1. Pile top fixing assembly; 101. Support rod; 102. Clamping plate; 1021. Upper plate; 1022. Side plate; 103. Collar; 104. Telescopic arm; 105. Connecting rod; 106. Pile top locking nut; 2. Circumferential sliding platform; 201. Annular plate; 2011. Outer ring plate; 2012. Middle ring plate; 2013. Inner ring plate; 2014. Annular groove; 202. Circumferential sliding seat; 2021. Sleeve; 2022. Arc plate; 2023. Pulley; 203. Leveling knob; 301. Moving seat; 302. Connecting piece; 3021. Screw; 3022. Ear plate; 3023. Pin hole; 3024. Pin; 3. Moving frame; 4. Cutting machine; 5. Upper rotating ball; 6. Lower rotating ball; 7. Pile side locking nut; 8. Tightening bolt. Detailed Implementation
[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described 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 implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0024] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should fall within the scope of the technical content disclosed in the present invention. It should be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.
[0025] like Figure 1 and Figure 4 As shown in the figure, the soft soil pile foundation circumferential cutting device disclosed in this embodiment includes a pile top fixing component 1, a circumferential sliding platform 2, a moving frame 3, and a cutting machine 4.
[0026] like Figure 5 As shown, the pile top fixing assembly 1 includes a support rod 101 and an arc-shaped clamping plate 102. The support rod 101 is used to support the top surface of the pile head. Multiple clamping plates 102 are equidistantly arranged along the circumferential direction on the side of the support rod 101. Specifically, in this embodiment, four clamping plates 102 are provided. The clamping plates 102 are configured to clamp onto the side of the pile head when moved towards the center of the pile head. Thus, by supporting the top surface of the pile head with the support rod 101 and clamping onto the side of the pile head with the clamping plates 102, the pile top fixing assembly 1 can be stably fixed to the pile head.
[0027] like Figure 6 As shown, the circumferential sliding platform 2 includes an annular plate 201, an annular slide block 202, and leveling knobs 203. The inner diameter of the annular plate 201 is larger than the outer diameter of the pile top fixing component 1. Specifically, the pile top fixing component 1 is always located within the inner circle of the annular plate 201 in the radial direction. The annular slide block 202 is slidably fitted onto the annular plate 201. By moving on the annular plate 201, the annular slide block 202 can move around the pile head. Multiple leveling knobs 203 are provided between the annular plate 201 and the pile top fixing component 1. The leveling knobs 203 are used to suspend the annular sliding platform on the pile top fixing component 1 and can adjust the annular sliding platform to a horizontal state.
[0028] like Figure 7As shown, the movable frame 3 is located on the side of the pile head being cut, so that the entire movable frame 3 is positioned outside the pile head. The movable frame 3 includes a movable base 301 for ground displacement and a connector 302 disposed on top of the movable base 301. A circumferential slide 202 is connected to the connector 302, and the connector 302 can adjust the height of the circumferential sliding platform 2 and the pile top fixing assembly 1. Rollers are provided on the movable base 301.
[0029] The cutting machine 4 can move synchronously in the height and circumferential directions with the circumferential slide 202 via the connector 302, and the cutting machine 4 can swing around the connector 302. Specifically, the cutting machine 4 is connected to the movable base 301 via the connector 302.
[0030] In this embodiment, by moving the mobile frame 3 across the construction site, the cutting machine 4 is directly moved to the side of the pile head to be cut, and both the pile top fixing component 1 and the circumferential sliding platform 2 are positioned above the pile head. This facilitates the movement of the cutting machine 4 across the construction site and the adjustment of its position between different pile heads, improving the efficiency of the cutting operation and making it easier to use. Then, the pile top fixing component 1, the circumferential sliding platform 2, and the cutting machine 4 are moved downwards via the connecting piece 302.
[0031] After the pile top fixing component 1 is fixed to the pile head, the circumferential sliding platform 2 and the cutting machine 4 can no longer move downwards. At this time, continuing to operate the connector 302 will cause the moving frame 3 to move upwards and detach from the ground. The cutting machine 4 and the moving frame 3 are suspended by the circumferential sliding platform 2, and the weight of the entire circumferential cutting device will be applied to the pile top fixing component 1, providing a stable force for the pile top fixing component 1, so that the pile top fixing component 1 is stably pressed down on the top surface of the pile head.
[0032] Next, operate the leveling knob 203 to level the cutting machine 4 by adjusting the circumferential sliding platform 2, and then perform the circumferential cutting operation. During the circumferential cutting process, the suspension function of the pile top fixing component 1 can prevent the cutting machine 4 from falling or tilting during the cutting process, which can better protect the cutting blade, improve safety, and ensure that the cutting surface is horizontal, thereby improving the cutting effect.
[0033] like Figure 5 As shown, the pile top fixing assembly 1 also includes a collar 103, a telescopic arm 104, and a connecting rod 105. The collar 103 is slidably sleeved on the outside of the support rod 101. The clamping plate 102 is fixedly installed on the movable end of the telescopic arm 104. The fixed end of the telescopic arm 104 is fixedly connected to the side of the collar 103. The two ends of the connecting rod 105 are rotatably connected to the movable end of the telescopic arm 104 and the support rod 101, respectively, and are used to pull the movable end of the telescopic arm 104 toward the center of the pile head when the support rod 101 moves upward.
[0034] In the initial state, the connecting rod 105 is horizontal, the movable end of the telescopic arm 104 is located at the outermost position inside the fixed end, and the clamping plate 102 is at the position furthest from the support rod 101. The bottom end of the support rod 101 passes through the collar 103 and extends out from the bottom of the collar 103.
[0035] When the connecting piece 302 moves the pile top fixing component 1, the circumferential sliding platform 2 and the cutting machine 4 downward, the support rod 101 will be subjected to a reverse force after contacting the top surface of the pile head, causing the support rod 101 to move upward relative to the collar 103 and the telescopic arm 104. At this time, the connecting rod 105 will pull the movable end of the telescopic arm 104 towards the center of the pile head, so that the clamping plate 102 will clamp the side of the pile head.
[0036] like Figure 5 As shown, the pile top fixing assembly 1 also includes a pile top locking nut 106. The support rod 101 is a screw rod. The pile top locking nut 106 is threaded on the outside of the support rod 101 and is located on the upper side of the collar 103. The pile top locking nut 106 locks the support rod 101 in the highest position by supporting it on the top of the collar 103.
[0037] In the initial state, the pile top locking nut 106 is at its highest position on the support rod 101, located between the top of the support rod 101 and the collar 103. When the support rod 101 moves upward relative to the collar 103 due to the reaction force from the pile head, the pile top locking nut 106 will move upward with the support rod 101 and disengage from the collar 103. After the clamping plate 102 clamps the side of the pile head, the pile top locking nut 106 is rotated downward, causing the pile top locking nut 106 to press down on the collar 103, locking the clamping plate 102 in the state of clamping the side of the pile head.
[0038] like Figure 2 As shown, an upper rotating ball 5 is rotatably mounted on the fixed end of the telescopic arm 104, and a lower rotating ball 6 is rotatably mounted on the annular plate 201. The leveling knob 203 is a screw, and the bottom end of the leveling knob 203 is rotatably engaged with the top of the lower rotating ball 6. The leveling knob 203 passes through the upper rotating ball 5, and the leveling knob 203 and the upper rotating ball 5 are threadedly engaged.
[0039] In this embodiment, the annular sliding platform can be leveled by rotating the leveling knob 203 at different positions. At the same time, the leveling knob 203 is threadedly engaged with the upper rotating ball 5, and the leveling knob 203 is rotatably engaged with the lower rotating ball 6, which can stably suspend the annular sliding platform 2 on the pile top fixing assembly 1.
[0040] like Figure 2As shown, the upper rotating ball 5 is provided with pile-side locking nuts 7 on both its upper and lower sides, and the pile-side locking nuts 7 are threadedly engaged with the leveling knob 203. After leveling the circumferential sliding platform 2 by rotating the leveling knob 203, rotating the two pile-side locking nuts 7 on the leveling knob 203 causes the two pile-side locking nuts 7 to clamp the upper rotating ball 5 from the upper and lower sides respectively, thus locking the circumferential sliding platform 2 in the leveled state.
[0041] like Figure 5 As shown, the clamping plate 102 includes an upper plate 1021 for supporting the top edge of the pile head and a side plate 1022 for supporting the side of the pile head. When the side plate 1022 is fully attached to the side of the pile head, the multiple clamping plates 102 are connected end to end in the circumferential direction.
[0042] The upper plate 1021 can be supported on the edge of the top surface of the pile head, and the side plate 1022 can be clamped on the side of the pile head. When the clamping plate 102 clamps the pile head, it can limit the pile top fixing component 1 in the height direction and radial direction, so that the pile top fixing component 1 can be more stably fixed on the pile head, thereby providing a more stable suspension foundation for the cutting machine 4 and the annular sliding platform, and more effectively ensuring the cutting effect.
[0043] The inner diameter of the side plate 1022 is set to match the preset outer diameter of the pile head. When the pile head is formed to standard, after the clamping plate 102 clamps the pile head, the side plate 1022 can completely fit the side of the pile head. Moreover, multiple clamping plates 102 are connected end to end in the circumferential direction, forming a complete ring structure, which can provide a more stable suspension foundation for the circumferential sliding platform 2 and the cutting machine 4.
[0044] like Figure 6 As shown, the circumferential slide 202 includes a sleeve 2021, an arc plate 2022, and a pulley 2023. The sleeve 2021 is connected to the connector 302. The arc plate 2022 is fixedly sleeved on the top and bottom ends of the sleeve 2021. One pulley 2023 is provided at each end of the two arc plates 2022 on opposite sides. The two arc plates 2022 are located on the upper and lower sides of the annular plate 201, respectively, and the pulley 2023 slides with the annular plate 201.
[0045] In this embodiment, the pulley 2023, together with the arc plate 2022, suspends the circumferential slide block 202 as a whole on the annular plate 201, so that the circumferential slide block 202 and the annular plate 201 can move synchronously in the height direction. Thus, when the circumferential sliding platform 2 is raised or lowered or leveled, the height and level of the cutting machine 4 can be adjusted by the circumferential slide block 202.
[0046] like Figure 6As shown, the annular plate 201 includes an outer ring plate 2011, a middle ring plate 2012 and an inner ring plate 2013 distributed sequentially from the outside to the inside. The annular plate 201 has annular grooves 2014 on both the upper and lower sides of the middle ring plate 2012. The pulley 2023 is located in the annular groove 2014. The leveling knob 203 is located between the inner ring plate 2013 and the pile top fixing component 1.
[0047] The pulley 2023 extends into the annular groove 2014, and the sleeve 2021 is located outside the outer ring plate 2011. At this time, the sleeve 2021 and the pulley 2023 restrict the position of the circumferential slide block 202 in the inward and outward directions, and the pulley 2023 and the arc plate 2022 can stably suspend the circumferential slide block 202 on the annular plate 201.
[0048] In a relatively specific embodiment, the lower rotating ball 6 is installed on the top of the inner ring plate 2013. In the height direction, the height of the lower rotating ball 6 is greater than the height of the upper arc plate 2022, so that when the circumferential slide 202 moves on the ring plate 201, the lower rotating ball 6 will not interfere with the upper arc plate 2022.
[0049] like Figure 3 As shown, a tightening bolt 8 is threaded on the inner ring plate 2013. The tightening bolt 8 is located between two adjacent leveling knobs 203. After the circumferential sliding platform 2 is leveled, each tightening bolt 8 is rotated so that the tightening bolt 8 is supported on the side of the pile head, providing auxiliary support for the circumferential sliding platform 2, further improving stability and ensuring the cutting effect.
[0050] like Figure 7 As shown, the connector 302 includes a lead screw 3021 and an ear plate 3022. The bottom end of the lead screw 3021 is rotatably engaged with the moving seat 301. Two ear plates 3022 are threaded on the outside of the lead screw 3021, and the two ear plates 3022 are fixedly connected to the cutting machine 4. The annular slide is located between the two ear plates 3022 in the height direction.
[0051] Both ear plates 3022 are fixed to the cutting mechanism, thus maintaining a relatively fixed position between them. By rotating the lead screw, the ear plates 3022 drive the cutting machine 4 to adjust its height on the lead screw 3021. At the same time, the ear plates 3022 can adjust the height of the circumferential slide 202 by pushing the sleeve 2021. The circumferential slide 202 can adjust the height of the annular plate 201. The annular plate 201 can adjust the height of the telescopic arm 104 and the clamping plate 102 by adjusting the leveling knob 203.
[0052] like Figure 7As shown, the connector 302 also includes pin holes 3023 and pins 3024. Several pin holes 3023 are provided on the lead screw 3021. The pins 3024 can be inserted into the pin holes 3023. When the cutting machine 4 is at the highest position of the lead screw 3021, the pins 3024 can be supported at the bottom of the lower ear plate 3022 by inserting into the highest pin hole 3023 located below the cutting machine 4. When the cutting machine 4 is at the lowest position of the lead screw 3021, the pins 3024 can be supported at the top of the upper ear plate 3022 by inserting into the lowest pin hole 3023 located above the cutting machine 4.
[0053] In the initial state, the cutting machine 4 is at the highest position of the lead screw 3021. At this time, the pin 3024 is supported at the bottom of the lower ear plate 3022. Since the ear plate 3022 cannot move downward on the lead screw 3021, the ear plate 3022 cannot rotate outside the lead screw 3021, thus locking the cutting machine 4 on the lead screw 3021.
[0054] During the circumferential cutting operation, the cutting machine 4 is at the lowest position of the lead screw 3021. At this time, the pin 3024 is supported on the top of the upper ear plate 3022. Since the ear plate 3022 cannot move upward on the lead screw 3021, it cannot rotate outside the lead screw 3021, thus locking the cutting machine 4 on the lead screw 3021. Therefore, when the cutting machine 4 is pushed to move circumferentially along the pile head, the height of the moving frame 3 will not shift in the height direction due to the relative rotation of the lead screw 3021 and the ear plate 3022, thereby improving the stability of the circumferential cutting.
[0055] During work: 1. The circumferential cutting device is moved to the pile head to be cut by the moving frame 3. At this time, the moving frame 3 and the cutting machine 4 are both located on the side of the pile head to be cut. The ear plate 3022 is located at the highest position on the screw. The ear plate 3022 supports the cutting machine 4 at the highest position. The ear plate 3022 supports the circumferential sliding platform 2 at the highest position through the circumferential sliding seat 202. The circumferential sliding assembly supports the telescopic arm 104, the collar 103 and the clamping plate 102 at the highest position through the leveling knob 203. Under its own weight, the support rod 101 is at the lowest displacement with its bottom end passing through the collar 103. The connecting rod 105 is in a horizontal state. The movable end of the telescopic arm 104 is located at the outermost position of the fixed end. The clamping plate 102 is at the position farthest from the support rod 101. The pile top fixing assembly 1 and the circumferential sliding platform 2 are both located above the pile head.
[0056] 2. Rotating the lead screw 3021 causes the ear plate 3022 to move downward on the lead screw 3021. At this time, the cutting machine 4, the pile top fixing component 1, and the circumferential sliding platform 2 all move downward. After the bottom end of the support rod 101 contacts the top surface of the pile head, it is subjected to the reaction force of the pile head, causing the support rod 101 to move upward relative to the collar 103. The support rod 101 pulls the movable end of the telescopic arm 104 inward through the connecting rod 105. The movable end of the telescopic arm 104 pulls the clamping plate 102 at the center of the pile head. After the clamping plate 102 clamps the pile head, it can no longer move towards the center of the pile head, so that the pile top fixing component 1 automatically clamps the pile head under the action of gravity.
[0057] 3. As the lead screw 3021 continues to rotate, the pile top fixing component 1 is supported by the pile head, the circumferential sliding platform 2 is suspended from the pile top fixing component 1, and the cutting machine 4 is suspended from the circumferential sliding platform 2. This prevents the pile top fixing component 1, the circumferential sliding platform 2, and the cutting machine 4 from moving downwards. Consequently, the moving frame 3 retracts upwards and lifts off the ground until the ear plate 3022 moves to the lowest position of the lead screw 3021. Then, the pin 3024 is inserted into the pin hole 3023, so that the pin 3024 is supported on the top of the upper ear plate 3022. At this time, the moving frame 3 is locked in the height direction, and the lead screw 3021 and ear plate 3022 are locked in the circumferential direction. The moving frame 3 and the cutting machine 4 can swing around the sleeve 2021 as the center, allowing the cutting blade to cut into the side of the pile head to begin the circumferential cutting operation.
[0058] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.
Claims
1. A soft soil pile foundation circumferential cutting device, characterized in that, include: The pile top fixing assembly (1) includes a strut (101) and an arc-shaped clamp (102). The strut (101) is used to support the top surface of the pile head. Multiple clamps (102) are equidistantly arranged along the circumferential direction on the side of the strut (101). The clamps (102) are configured to clamp the side of the pile head when moved toward the center of the pile head. The circumferential sliding platform (2) includes an annular plate (201), an annular slide block (202), and a leveling knob (203). The inner diameter of the annular plate (201) is larger than the outer diameter of the pile top fixing component (1). The annular slide block (202) is slidably sleeved on the annular plate (201). Multiple leveling knobs (203) are provided between the annular plate (201) and the pile top fixing component (1). The leveling knobs (203) are used to suspend the annular sliding platform on the pile top fixing component (1) and can adjust the annular sliding platform to a horizontal state. The mobile frame (3) is located on the side of the pile head being cut. The mobile frame (3) includes a mobile seat (301) for displacement on the ground and a connector (302) disposed on the top of the mobile seat (301). The circumferential sliding seat (202) is connected to the connector (302), and the connector (302) is capable of adjusting the height of the circumferential sliding platform (2) and the pile top fixing assembly (1). The cutting machine (4) can move synchronously in the height and circumferential directions with the connecting member (302) and the circumferential slide (202), and the cutting machine (4) can swing around the connecting member (302) as the center.
2. The soft soil pile foundation circumferential cutting device according to claim 1, characterized in that, The pile top fixing assembly (1) also includes a collar (103), a telescopic arm (104), and a connecting rod (105). The collar (103) is slidably sleeved on the outside of the support rod (101). The clamp (102) is fixedly installed on the movable end of the telescopic arm (104). The fixed end of the telescopic arm (104) is fixedly connected to the side of the collar (103). The two ends of the connecting rod (105) are respectively rotatably connected to the movable end of the telescopic arm (104) and the support rod (101), and are used to pull the movable end of the telescopic arm (104) towards the center of the pile head when the support rod (101) moves upward.
3. The soft soil pile foundation circumferential cutting device according to claim 2, characterized in that, The fixed end of the telescopic arm (104) is rotatably mounted with an upper rotating ball (5), and the annular plate (201) is rotatably mounted with a lower rotating ball (6). The leveling knob (203) is a screw. The bottom end of the leveling knob (203) is rotatably engaged with the top of the lower rotating ball (6). The leveling knob (203) passes through the upper rotating ball (5), and the leveling knob (203) is threadedly engaged with the upper rotating ball (5).
4. The soft soil pile foundation circumferential cutting device according to claim 3, characterized in that, Both sides of the upper rotating ball (5) are provided with pile-side locking nuts (7), and the pile-side locking nuts (7) are threadedly engaged with the leveling knob (203).
5. A soft soil pile foundation circumferential cutting device according to claim 2, characterized in that, The pile top fixing assembly (1) also includes a pile top locking nut (106). The support rod (101) is a screw rod. The pile top locking nut (106) is threaded on the outside of the support rod (101) and is located on the upper side of the collar (103). The pile top locking nut (106) locks the support rod (101) at the highest position by supporting it on the top of the collar (103).
6. The soft soil pile foundation circumferential cutting device according to claim 1, characterized in that, The clamping plate (102) includes an upper plate (1021) for supporting the top edge of the pile head and a side plate (1022) for supporting the side of the pile head. When the side plate (1022) is fully attached to the side of the pile head, the multiple clamping plates (102) are connected end to end in the circumferential direction.
7. The soft soil pile foundation circumferential cutting device according to claim 1, characterized in that, The circumferential slide (202) includes a sleeve (2021), an arc plate (2022), and a pulley (2023). The sleeve (2021) is connected to the connector (302). The arc plate (2022) is fixedly sleeved on the top and bottom ends of the sleeve (2021). The pulley (2023) is provided at both ends of the two arc plates (2022) on opposite sides. The two arc plates (2022) are located on the upper and lower sides of the annular plate (201), respectively, and the pulley (2023) slides with the annular plate (201).
8. A soft soil pile foundation circumferential cutting device according to claim 7, characterized in that, The annular plate (201) includes an outer ring plate (2011), a middle ring plate (2012) and an inner ring plate (2013) distributed sequentially from the outside to the inside. The annular plate (201) has annular grooves (2014) on both the upper and lower sides of the middle ring plate (2012). The pulley (2023) is located in the annular grooves (2014). The leveling knob (203) is located between the inner ring plate (2013) and the pile top fixing assembly (1).
9. A soft soil pile foundation circumferential cutting device according to claim 1, characterized in that, The connector (302) includes a lead screw (3021) and an ear plate (3022). The bottom end of the lead screw (3021) is rotatably engaged with the moving seat (301). Two ear plates (3022) are threaded on the outside of the lead screw (3021), and the two ear plates (3022) are fixedly connected to the cutting machine (4). The annular slide is located between the two ear plates (3022) in the height direction.
10. A soft soil pile foundation circumferential cutting device according to claim 9, characterized in that, The connector (302) also includes pin holes (3023) and pins (3024). Several pin holes (3023) are provided on the lead screw (3021). The pins (3024) can be inserted into the pin holes (3023). When the cutting machine (4) is at the highest position of the lead screw (3021), the pins (3024) can be supported at the bottom of the lower ear plate (3022) by inserting into the highest pin hole (3023) located below the cutting machine (4). When the cutting machine (4) is at the lowest position of the lead screw (3021), the pins (3024) can be supported at the top of the upper ear plate (3022) by inserting into the lowest pin hole (3023) located above the cutting machine (4).