A cutting device and method for steel pipe pile after sinking

Abstract

This invention provides a cutting device and method for steel pipe piles after they have been driven into place. The device includes the steel pipe pile to be cut, and comprises a pile-holding mechanism, a leveling mechanism, and a cutting mechanism arranged sequentially from bottom to top. The pile-holding mechanism is used to fix the cutting device to the top of the steel pipe pile to be cut, and the leveling mechanism is used to adjust the cutting mechanism to a horizontal position. By using a cutting device to replace the traditional manual platform, this invention enables cutting operations on steel pipe piles that have not been driven into place, as well as inclined steel pipe piles that need to be cut due to the requirements of pile cap construction. In terms of safety, it eliminates the risks associated with manual labor, reduces the need for manpower, and makes construction safer and more reliable. It also extends the working window, allowing for continuous cutting operations regardless of tides or whether water covers the equipment and steel pipe pile, thus increasing cutting efficiency and safety.

Description

Technical Field

[0001] This invention relates to the field of steel pipe pile cutting, and in particular to a cutting device and method for steel pipe piles after they have been driven in. Background Technology

[0002] During the construction of steel pipe piles, numerous factors can lead to problems. The complexity of geological conditions and limitations in equipment performance often prevent the steel pipe piles from being successfully driven to the designated position. This is especially true after the installation of inclined piles, where the steel pipe piles frequently tilt, exceeding the design elevation. Since the construction of the pile cap has strict requirements on the elevation of the steel pipe piles, any portion exceeding the design elevation must be removed.

[0003] Currently, steel pipe pile cutting mainly relies on manual operation. The underwater cutting method involves constructing a cutting platform on the water, where workers carry cutting equipment to perform the work. However, this method is severely constrained by factors such as water level fluctuations, resulting in a narrow window of suitable construction time and hindering efficiency. Furthermore, when cutting extra-high sections underwater, divers must carry the cutting equipment, which is not only inefficient but also poses significant safety risks. Therefore, this paper proposes a cutting device and method for steel pipe piles after sinking to address these problems. Summary of the Invention

[0004] The main objective of this invention is to provide a cutting device and method for steel pipe piles after they have been driven into the ground, which solves the problems of low construction efficiency and high safety risks associated with existing manual cutting methods.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a cutting device and method for steel pipe piles after sinking, including a steel pipe pile to be cut, the cutting device including a pile holding mechanism, a leveling mechanism and a cutting mechanism arranged sequentially from bottom to top, wherein the pile holding mechanism is used to fix the cutting device to the top of the steel pipe pile to be cut, and the leveling mechanism is used to adjust the cutting mechanism to a horizontal position;

[0006] The cutting mechanism includes a cutting frame, with a wire saw on the top, wire saw guide wheels on the sides, and a moving plane wheel on the bottom. The cutting wire of the wire saw forms a closed-loop horizontal cutting line at the bottom of the cutting frame via the wire saw guide wheels and the moving plane wheel.

[0007] In the preferred embodiment, wire saw guide wheels are provided at the four corners of the side of the cutting frame. The wire saw guide wheels arranged vertically opposite each other form a set. Two movable plane wheels are provided at the bottom of the cutting frame, and the two movable plane wheels correspond to the two sets of wire saw guide wheels respectively.

[0008] In the preferred embodiment, the movable planar wheel includes two opposing support plates, with a slide bar between the two support plates. A planar wheel assembly is slidably fitted onto the outside of the slide bar, and the planar wheel assembly can move back and forth towards the corresponding wire saw guide wheel via the slide bar.

[0009] In a preferred embodiment, the planar wheel assembly includes a mounting base. The top of the mounting base is provided with a sleeve that can be slidably fitted onto the outside of the slide rod. One end of the bottom of the mounting base is provided with a fixed planar wheel, and the other end is provided with a slide groove. Both sides of the slide groove are provided with through slots that penetrate the mounting base. A displacement seat is movably installed in the slide groove. Both sides of the displacement seat are provided with locking screws that pass through the corresponding through slots. The bottom of the displacement seat is provided with a movable planar wheel that is parallel to the fixed planar wheel. The cutting rope of the wire saw passes between the fixed planar wheel and the movable planar wheel. The end of the locking screw passes through the through slot and is threaded with a locking nut. A telescopic spring that abuts against the displacement seat is also provided in the slide groove.

[0010] In the preferred embodiment, the slide bar is hollow inside;

[0011] The movable planar wheel also includes a reset mechanism, which includes a reset screw rotatably mounted in the slide rod. The slide rod has a moving groove communicating with its interior on its exterior, and a limit groove on its inner wall. A rotary drive device connected to the reset screw is provided on the outer side of one of the support plates. A reset internal thread shaft is threaded onto the exterior of the reset screw. A reset block and a limit block are provided on the exterior of the reset internal thread shaft. The reset block extends through the moving groove to the exterior of the slide rod, and the limit block slides in engagement with the limit groove.

[0012] In a preferred embodiment, the wire saw includes a movable frame mounted on top of the cutting frame, on which the wire saw main unit is movably mounted. The drive wheels of the wire saw main unit are arranged horizontally, and two sets of guide wheels are symmetrically arranged on them. The guide wheels include corner wheels, horizontal guide wheels and vertical guide wheels arranged in sequence.

[0013] A diagonal brace is installed between the bottom of the extended end of the movable frame and the side wall of the cutting frame.

[0014] In the preferred embodiment, the pile-holding mechanism includes a pile-holding frame, in which multiple pile-holding components are arranged vertically in sequence;

[0015] The pile clamping assembly includes an arc-shaped fixed arm located inside the pile clamping frame. Both ends of the arc-shaped fixed arm are hinged with pile clamping arms. An opening and closing hydraulic cylinder is located between the outer side of the pile clamping arm and the inner side of the pile clamping frame. Both ends of the opening and closing hydraulic cylinder are hinged.

[0016] The leveling mechanism is a three-point support platform formed by three leveling cylinders. The two ends of the three leveling cylinders are respectively hinged to the pile holding mechanism and the cutting frame through Hooke hinges.

[0017] The pile clamping frame is equipped with a set of guide rollers at both the top and bottom. Both sets of guide rollers can surround the steel pipe pile to be cut. The guide rollers include telescopic cylinders fixed on the pile clamping frame and guide wheels set on the telescopic end of the telescopic cylinders.

[0018] In the preferred embodiment, the pile clamping mechanism further includes a locking mechanism. The locking mechanism includes through holes at the ends of the two pile clamping arms of the pile clamping assembly. Both pile clamping arms of the uppermost pile clamping assembly are provided with connecting telescopic cylinders. The connecting telescopic cylinders are located at the through holes, and their telescopic ends can pass through the through holes on all the pile clamping arms in the vertical direction. The pile clamping frame is also provided with a locking assembly for locking the two connecting telescopic cylinders.

[0019] The locking assembly includes two baffles mounted opposite each other on the pile clamping frame. Between the two baffles is a rotatable forward and reverse threaded screw and two limit slide rods. A locking drive device is located on the outer side of one of the baffles. The output end of the locking drive device is connected to the forward and reverse threaded screw. Locking seats are threaded onto the forward and reverse threads of the forward and reverse threaded screw. The locking seats are simultaneously slidably mounted on the two limit slide rods. Multiple locking arms are provided on the side of the locking seats for connecting and communicating with the telescopic cylinder.

[0020] In a preferred embodiment, a magnetic attraction mechanism is also provided on the inner top wall of the cutting frame. The magnetic attraction mechanism includes a winch provided on the inner top wall of the cutting frame and an electromagnet provided on the hoisting rope of the winch.

[0021] The bottom of the cutting frame is also equipped with a positioner parallel to the horizontal cutting line.

[0022] The method includes: S1, using hoisting equipment to hoist the cutting device above the steel pipe pile to be cut;

[0023] S2. After adjusting the pile holding angle, slowly lower the cutting device and make the steel pipe pile to be cut pass through the pile holding mechanism of the cutting device and go deep into the cutting frame.

[0024] S3. After lowering to the designated height, the steel pipe pile to be cut is held by the pile holding mechanism, thereby fixing the cutting device on the steel pipe pile to be cut, and then the hook of the hoisting equipment is released.

[0025] S4. Use the leveling mechanism to level the cutting frame above the cutting device and bring it to the target height;

[0026] S5. Start the wire saw and cut the extra-high portion of the steel pipe pile to be cut.

[0027] This invention provides a cutting device and method for steel pipe piles after they have been driven into place. The cutting device replaces the traditional manual platform and is used to cut steel pipe piles that have not been driven into place, as well as inclined steel pipe piles that need to be cut due to the requirements of pile cap construction. In terms of safety, it eliminates the risks of manual labor, reduces the demand for manpower, and makes the construction safer and more reliable. At the same time, it increases the working window period, and can continuously cut the piles regardless of whether there is tide or whether the water has submerged the equipment and the steel pipe piles, thereby increasing the efficiency and safety of pile cutting. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0029] Figure 1 This is a structural diagram showing the connection between the cutting device of the present invention and the steel pipe pile to be cut;

[0030] Figure 2 This is a structural diagram of the cutting device of the present invention;

[0031] Figure 3 This is a schematic diagram of the upper part of the cutting device of the present invention;

[0032] Figure 4 This is a top view of the cutting device structure of the present invention;

[0033] Figure 5 This is a structural diagram of the movable planar wheel of the present invention;

[0034] Figure 6 This is an exploded cross-sectional view of the planar wheel assembly of the present invention;

[0035] Figure 7 This is the present invention. Figure 5 Half-section view of the structure;

[0036] Figure 8 This is a structural diagram of the pile-holding mechanism of the present invention;

[0037] Figure 9 This is an exploded view of part of the pile-holding mechanism of the present invention;

[0038] Figure 10 This is a structural diagram of the locking assembly of the present invention;

[0039] In the diagram: Cutting device 100; Pile clamping mechanism 1; Pile clamping frame 101; Guide roller 102; Pile clamping assembly 103; Arc-shaped fixed arm 1030; Pile clamping arm 1031; Opening and closing hydraulic cylinder 1032; Locking mechanism 104; Through hole 1040; Connecting telescopic cylinder 1041; Locking assembly 1042; Baffle 1043; Limiting slide rod 1044; Positive and negative threaded screw 1045; Locking drive device 1046; Locking seat 1047; Locking arm 1048; Leveling mechanism 2; Cutting frame 3; Wire saw guide wheel 4; Moving plane wheel 5; Support plate 501; Slide rod 502; Plane wheel assembly 503; Mounting seat 5030; Sleeve 5031; Fixed plane wheel; 5032; Slide groove; 5033; Through groove; 5034; Displacement seat; 5035; Locking screw; 5036; Movable plane wheel; 5037; Locking nut; 5038; Telescopic spring; 5039; Reset mechanism; 504; Reset screw; 5040; Rotary drive device; 5041; Moving groove; 5042; Limiting groove; 5043; Reset internal thread shaft; 5044; Reset block; 5045; Limiting block; 5046; Wire saw; 6; Moving frame; 601; Wire saw main unit; 602; Corner wheel; 603; Horizontal guide wheel; 604; Vertical guide wheel; 605; Diagonal brace; 606; Magnetic attraction mechanism; 200; Steel pipe pile to be cut. Detailed Implementation

[0040] Example 1

[0041] like Figure 1-10 As shown, a steel pipe pile cutting device after sinking includes a steel pipe pile 200 to be cut. The cutting device 100 includes a pile holding mechanism 1, a leveling mechanism 2 and a cutting mechanism arranged sequentially from bottom to top. The cutting mechanism includes a cutting frame 3. A wire saw 6 is provided on the top of the cutting frame 3. A wire saw guide wheel 4 is provided on the side of the cutting frame 3 and a moving plane wheel 5 is provided on the bottom. The cutting rope of the wire saw 6 forms a closed-loop horizontal cutting line at the bottom of the cutting frame 3 through the wire saw guide wheel 4 and the moving plane wheel 5.

[0042] With this design, during use, the cutting device 100 is fixed to the top of the steel pipe pile 200 to be cut by the pile holding mechanism 1, and then the cutting mechanism is adjusted to a horizontal position by the leveling mechanism 2. Then, the wire saw 6 and the horizontal cutting line formed at the bottom are used to cut the part of the steel pipe pile 200 that is not cut, thereby completing the automatic cutting work.

[0043] It should be noted that the cutting frame 3 is a steel frame structure and is the main carrier for cutting. The width of the cutting frame 3 can accommodate the tilt angle of the steel pipe pile 200 to be cut and the space required for leveling. Moreover, both ends of the frame are open, so the steel pipe pile 200 can be cut through the openings when needed.

[0044] In the preferred embodiment, wire saw guide wheels 4 are provided at the four corners of the side of the cutting frame 3. The wire saw guide wheels 4 arranged vertically opposite each other form a group. In this embodiment, there are four wire saw guide wheels 4. Two movable plane wheels 5 are provided at the bottom of the cutting frame 3. The two movable plane wheels 5 correspond to the two groups of wire saw guide wheels 4 respectively. This design can utilize the corresponding arrangement of the two groups of wire saw guide wheels 4 and the two movable plane wheels 5 to guide the cutting rope of the wire saw 6 along the steel frame of the pile cutting platform to the cutting plane, while meeting its needs for entering and exiting on the wire saw 6.

[0045] Furthermore, the movable planar wheel 5 includes two opposing support plates 501, with a slide rod 502 between the two support plates 501. A planar wheel assembly 503 is slidably mounted on the outside of the slide rod 502. The planar wheel assembly 503 can move back and forth in the direction of the corresponding wire saw guide wheel 4 via the slide rod 502. Thus, when the wire saw 6 is moving and cutting, the planar wheel assembly 503 moves on the slide rod 502 to meet the needs of horizontal cutting line movement and cutting.

[0046] In a preferred embodiment, the planar wheel assembly 503 includes a mounting base 5030. The top of the mounting base 5030 is provided with a sleeve 5031 that slidably fits onto the slide rod 502, facilitating the back-and-forth sliding of the mounting base 5030 on the slide rod 502. One end of the bottom of the mounting base 5030 is provided with a fixed planar wheel 5032, and the other end is provided with a sliding groove 5033. Both sides of the sliding groove 5033 are provided with through slots 5034 penetrating the mounting base 5030. A displacement seat 5035 is movably mounted in the sliding groove 5033, and both sides of the displacement seat 5035 are provided with corresponding through slots. The locking screw 5036 in the through groove 5034 and the bottom of the displacement seat 5035 are provided with a movable plane wheel 5037 parallel to the fixed plane wheel 5032. The cutting rope of the wire saw 6 passes between the fixed plane wheel 5032 and the movable plane wheel 5037, which can clamp and limit the cutting rope of the wire saw 6 to prevent it from coming off during the cutting process. The end of the locking screw 5036 passes through the through groove 5034 and is threaded with a locking nut 5038. The sliding groove 5033 is also provided with a telescopic spring 5039 that abuts against the displacement seat 5035.

[0047] With this design, the displacement seat 5035, carrying the movable planar wheel 5037, can slide back and forth in the groove 5033 under the constraint of the locking screw 5036. This facilitates the installation and adjustment of the cutting rope of the wire saw 6, and also allows for fine-tuning of the cutting rope's thickness. Furthermore, the tension of the telescopic spring 5039 allows the displacement seat 5035 to quickly return to its original position after losing its external constraint, completing the installation of the cutting rope of the wire saw 6. Finally, the locking nut 5038 secures the position of the displacement seat 5035.

[0048] In the preferred embodiment, in order to enable the planar wheel assembly 503 to be reset after cutting, the slide bar 502 is hollow inside.

[0049] The movable planar wheel 5 also includes a reset mechanism 504, which includes a reset screw 5040 rotatably mounted in the slide rod 502. Both ends of the reset screw 5040 are rotatably mounted in the slide rod 502 via bearings. The slide rod 502 has a moving groove 5042 communicating with its interior on its exterior, and a limit groove 5043 on its inner wall. A rotary drive device, which is pulsatorically connected to the reset screw 5040, is located on the outer side of one of the support plates 501. In this embodiment, the rotary drive device 5041 is a drive motor, which drives the reset screw 5040 to rotate in the slide bar 502. The external thread of the reset screw 5040 is fitted with a reset internal thread shaft 5044. The reset internal thread shaft 5044 is provided with a reset block 5045 and a limiting block 5046 on its outside. The reset block 5045 extends through the moving groove 5042 to the outside of the slide bar 502. The limiting block 5046 slides in conjunction with the limiting groove 5043.

[0050] This design allows the reset internal thread shaft 5044 to move back and forth on the reset screw 5040 as it rotates forward or backward under the restriction of the limit block 5046. Thus, during reset, the protruding reset block 5045 can be used to push against the flat wheel assembly 503 to move, thereby completing the reset. After the reset is completed, it will rotate in reverse and move back to the origin, avoiding interference with normal cutting operations.

[0051] In a preferred embodiment, the wire saw 6 includes a movable frame 601 mounted on top of the cutting frame 3. The wire saw main unit 602 is movably mounted on the movable frame 601. The drive wheel of the wire saw main unit 602 is horizontally arranged, and two sets of guide wheels are symmetrically arranged on it. The guide wheels include a corner wheel 603, a horizontal guide wheel 604, and a vertical guide wheel 605 arranged in sequence. The arrangement of the corner wheel 603, the horizontal guide wheel 604, and the vertical guide wheel 605 facilitates the adjustment of the shape of the cutting rope and ensures that it can operate effectively under the drive of the drive wheel.

[0052] It should be noted that the wire saw 6 is an existing technology, and the rotation of its drive wheel and its movement on the moving frame 601 are common technologies, so they will not be described in detail here.

[0053] A diagonal brace 606 is provided between the bottom of the extended end of the moving frame 601 and the side wall of the cutting frame 3. In order to ensure that the wire saw 6 has a sufficient cutting distance, the tail end of the moving frame 601 can be set to the outside of the cutting frame 3. At the same time, by setting the diagonal brace 606, the overall stability can be effectively ensured.

[0054] In the preferred embodiment, the pile clamping mechanism 1 includes a pile clamping frame 101. In this embodiment, the pile clamping frame 101 is also a steel frame structure. Multiple pile clamping components 103 are arranged vertically in the pile clamping frame 101. In this embodiment, the number of pile clamping components 103 is two.

[0055] The pile-holding assembly 103 includes an arc-shaped fixed arm 1030 disposed inside the pile-holding frame 101. Both ends of the arc-shaped fixed arm 1030 are hinged to pile-holding arms 1031. An opening and closing hydraulic cylinder 1032 is disposed between the outer side of the pile-holding arm 1031 and the inner side of the pile-holding frame 101. Both ends of the opening and closing hydraulic cylinder 1032 are hinged. Therefore, the extension and retraction of the opening and closing hydraulic cylinder 1032 can control the two pile-holding arms 1031, thereby achieving the pile-holding effect.

[0056] The pile clamping frame 101 is equipped with a set of guide rollers 102 at both the top and bottom. Both sets of guide rollers 102 can surround the steel pipe pile 200 to be cut. The two sets of guide rollers 102 can play a guiding and supporting role when it is mounted on the outside of the steel pipe pile 200 to be cut in an inclined state, thereby improving its stability when moving outside the steel pipe pile 200 to be cut. In this embodiment, there are four guide rollers 102 in the lower set and three guide rollers 102 in the upper set. The three guide rollers 102 in the upper set can avoid unnecessary interference with the leveling mechanism 2.

[0057] The guide wheel 102 specifically includes a telescopic cylinder fixed on the pile clamping frame 101 and a guide wheel set on the telescopic end of the telescopic cylinder. The guide wheel can adjust its distance through the telescopic cylinder.

[0058] In the preferred embodiment, the pile clamping mechanism 1 further includes a locking mechanism 104. The locking mechanism 104 includes through holes 1040 at the ends of the two pile clamping arms 1031 of the pile clamping assembly 103. Both pile clamping arms 1031 of the uppermost pile clamping assembly 103 are provided with connecting telescopic cylinders 1041. The connecting telescopic cylinders 1041 are located at the through holes 1040, and their telescopic ends can pass through the through holes 1040 on all the pile clamping arms 1031 in the vertical direction. Thus, after effective pile clamping is formed, the upper and lower pile clamping assemblies 103 are connected into a whole. The pile clamping frame 101 is also provided with a locking assembly 1042 for pulling and locking the two connecting telescopic cylinders 1041.

[0059] The locking assembly 1042 includes two baffles 1043 oppositely arranged on the pile holder 101. A rotatable forward and reverse threaded screw 1045 and two limiting slide rods 1044 are arranged between the two baffles 1043. A locking drive device 1046 is arranged on the outer side of one of the baffles 1043. The locking drive device 1046 is a drive motor with a brake. The output end of the locking drive device 1046 is connected to the forward and reverse threaded screw 1045. A locking seat 1047 is threaded on the forward and reverse threads of the forward and reverse threaded screw 1045. The locking seat 1047 is slidably mounted on the two limiting slide rods 1044. A plurality of locking arms 1048 are arranged on the side of the locking seat 1047. In this embodiment, there are two locking arms 1048, which are used to connect and communicate with the telescopic cylinder 1041.

[0060] With this design, the locking drive device 1046 can drive the positive and negative threaded screws 1045 to rotate, thereby enabling the two locking seats 1047 on them to move in opposite or disjoint directions under the restriction of the limiting slide rod 1044 on the positive and negative threaded screws. This allows the locking arm 1048 to pull the two connected telescopic cylinders 1041 against each other, achieving a locking effect.

[0061] In the preferred embodiment, the leveling mechanism 2 is a three-point support platform formed by three leveling cylinders, and the specific arrangement is as follows: Figure 1 and 2 As shown, two leveling cylinders are located at the front ends, and another is located at the rear middle. The two ends of the three leveling cylinders are respectively hinged to the pile holding mechanism 1 and the cutting frame 3 via Hooke hinges.

[0062] The specific leveling method is as follows: using the step-by-step method, find the leveling cylinder with the highest levelness in the cutting frame 3 as the benchmark, and set the extension stroke of the other two legs according to the horizontal angles α and β of the rope surface so that angles α and β are 0 to level the cutting frame 3. Then, by adjusting the opening of the hydraulic proportional reversing valve, the three leveling legs are extended synchronously in proportion to achieve the target elevation y.

[0063] In the preferred embodiment, a magnetic attraction mechanism 7 is also provided on the inner top wall of the cutting frame 3 to attract the cut-off extra-high portion and prevent it from falling off naturally. The magnetic attraction mechanism 7 includes a winch provided on the inner top wall of the cutting frame 3 and an electromagnet provided on the hoisting rope of the winch. The winch is used to adjust the operating height of the electromagnet so that the electromagnet can attract the extra-high portion.

[0064] The bottom of the cutting frame 3 is also equipped with a locator parallel to the horizontal cutting line, which is used to determine the cutting height.

[0065] Additionally, it should be noted that by adjusting the overall length of the cutting frame 3, this equipment can cut single piles or multiple piles at once. When cutting multiple piles, the equipment can continuously cut for a long time after being hoisted and positioned. Furthermore, for the arrangement of the power control cabinet and hydraulic oil control cabinet, both can be installed on the floating crane or trestle and support trestle.

[0066] Example 2

[0067] Further explanation in conjunction with Example 1, such as Figure 1-10 The structure shown illustrates a method using a steel pipe pile cutting device as described in the above embodiments. This method includes:

[0068] S1. Use hoisting equipment to hoist the cutting device 100 above the steel pipe pile 200 to be cut;

[0069] S2. After adjusting the pile holding angle, slowly lower the cutting device 100 and make the steel pipe pile 200 to be cut pass through the pile holding mechanism 1 of the cutting device 100 and go deep into the cutting frame 3.

[0070] S3. After being lowered to the designated height, the steel pipe pile 200 to be cut is held by the pile holding mechanism 1, thereby fixing the cutting device 100 on the steel pipe pile 200 to be cut, and then the hook of the hoisting equipment is released.

[0071] S4. Use the leveling mechanism 2 to level the cutting frame 3 above the cutting device 100 and make it reach the target height;

[0072] S5. Start the wire saw 6 and cut the extra-high portion of the steel pipe pile 200 to be cut.

[0073] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A cutting device for steel pipe piles after driving, comprising the steel pipe pile (200) to be cut, characterized in that: The cutting device (100) includes a pile-holding mechanism (1), a leveling mechanism (2) and a cutting mechanism arranged sequentially from bottom to top. The pile-holding mechanism (1) is used to fix the cutting device (100) to the top of the steel pipe pile (200) to be cut, and the leveling mechanism (2) is used to adjust the cutting mechanism to a horizontal position. The cutting mechanism includes a cutting frame (3), a wire saw (6) is provided on the top of the cutting frame (3), a wire saw guide wheel (4) is provided on the side of the cutting frame (3), and a moving plane wheel (5) is provided at the bottom. The cutting rope of the wire saw (6) forms a closed-loop horizontal cutting line at the bottom of the cutting frame (3) through the wire saw guide wheel (4) and the moving plane wheel (5). Its features are: wire saw guide wheels (4) are provided at the four corners of the side of the cutting frame (3), and the wire saw guide wheels (4) arranged vertically opposite each other are a set. Two movable plane wheels (5) are provided at the bottom of the cutting frame (3), and the two movable plane wheels (5) correspond to the two sets of wire saw guide wheels (4) respectively. The movable planar wheel (5) includes two opposing support plates (501), and a slide bar (502) is provided between the two support plates (501). A planar wheel assembly (503) is slidably mounted on the outside of the slide bar (502). The planar wheel assembly (503) can move back and forth in the direction of the corresponding wire saw guide wheel (4) through the slide bar (502). The planar wheel assembly (503) includes a mounting base (5030). A sleeve (5031) is slidably fitted onto the outside of the slide rod (502) at the top of the mounting base (5030). A fixed planar wheel (5032) is provided at one end of the bottom of the mounting base (5030), and a sliding groove (5033) is provided at the other end. Both sides of the sliding groove (5033) are provided with through slots (5034) penetrating the mounting base (5030). A displacement seat (5035) is movably installed in the sliding groove (5033). Both sides of the displacement seat (5035) are provided with… There is a locking screw (5036) passing through the corresponding through groove (5034), and a movable plane wheel (5037) parallel to the fixed plane wheel (5032) is provided at the bottom of the displacement seat (5035). The cutting rope of the wire saw (6) passes between the fixed plane wheel (5032) and the movable plane wheel (5037). The end of the locking screw (5036) passes through the through groove (5034) and is threaded with a locking nut (5038). A telescopic spring (5039) that abuts against the displacement seat (5035) is also provided in the slide groove (5033).

2. The cutting device for steel pipe piles after driving according to claim 1, characterized in that: The interior of the slide bar (502) is hollow; The movable planar wheel (5) also includes a reset mechanism (504). The reset mechanism (504) includes a reset screw (5040) rotatably disposed in the slide bar (502). The slide bar (502) is provided with a moving groove (5042) communicating with its interior. The inner wall surface of the slide bar (502) is provided with a limiting groove (5043). A rotary drive device (5041) that is connected to the reset screw (5040) is provided on the outer side of one of the support plates (501). The reset screw (5040) is threaded with a reset internal thread shaft (5044). The reset internal thread shaft (5044) is provided with a reset block (5045) and a limiting block (5046) on its exterior. The reset block (5045) extends through the moving groove (5042) to the exterior of the slide bar (502). The limiting block (5046) slides in conjunction with the limiting groove (5043).

3. The cutting device for steel pipe piles after driving according to claim 1, characterized in that: The wire saw (6) includes a movable frame (601) set on top of the cutting frame (3). The wire saw main unit (602) is movably mounted on the movable frame (601). The drive wheel of the wire saw main unit (602) is arranged horizontally, and two sets of guide wheels are symmetrically arranged on it. The guide wheels include corner wheels (603), horizontal guide wheels (604) and vertical guide wheels (605) arranged in sequence. A diagonal brace (606) is provided between the bottom of the extended end of the movable frame (601) and the side wall of the cutting frame (3).

4. The cutting device for steel pipe piles after driving according to claim 1, characterized in that: The pile clamping mechanism (1) includes a pile clamping frame (101), and multiple pile clamping components (103) arranged vertically in the pile clamping frame (101). The pile clamping assembly (103) includes an arc-shaped fixed arm (1030) disposed inside the pile clamping frame (101). Both ends of the arc-shaped fixed arm (1030) are hinged with pile clamping arms (1031). An opening and closing hydraulic cylinder (1032) is disposed between the outer side of the pile clamping arm (1031) and the inner side of the pile clamping frame (101). Both ends of the opening and closing hydraulic cylinder (1032) are hinged. The leveling mechanism (2) is a three-point support platform formed by three leveling cylinders. The two ends of the three leveling cylinders are respectively hinged to the pile holding mechanism (1) and the cutting frame (3) through Hooke hinges. The pile clamping frame (101) is equipped with a set of guide rollers (102) at both the top and bottom. Both sets of guide rollers (102) can surround the steel pipe pile (200) to be cut. The guide wheel (102) includes a telescopic cylinder fixed on the pile clamp (101) and a guide wheel set on the telescopic end of the telescopic cylinder.

5. The cutting device for steel pipe piles after driving according to claim 4, characterized in that: The pile clamping mechanism (1) also includes a locking mechanism (104). The locking mechanism (104) includes through holes (1040) at the ends of the two pile clamping arms (1031) of the pile clamping assembly (103). Both pile clamping arms (1031) of the uppermost pile clamping assembly (103) are provided with connecting telescopic cylinders (1041). The connecting telescopic cylinders (1041) are located at the through holes (1040), and their telescopic ends can pass through the through holes (1040) on all the pile clamping arms (1031) in the vertical direction. The pile clamping frame (101) is also provided with a locking assembly (1042) for locking the two connecting telescopic cylinders (1041) in a pulling manner. The locking assembly (1042) includes two baffles (1043) arranged opposite to each other on the pile holder (101). A rotatable forward and reverse threaded screw (1045) and two limit slide rods (1044) are arranged between the two baffles (1043). A locking drive device (1046) is arranged on the outer side of one of the baffles (1043). The output end of the locking drive device (1046) is connected to the forward and reverse threaded screw (1045) for transmission. Locking seats (1047) are threaded on the forward and reverse threads of the forward and reverse threaded screw (1045). The locking seats (1047) are simultaneously slidably mounted on the two limit slide rods (1044). Multiple locking arms (1048) are arranged on the side of the locking seats (1047) for connecting and communicating with the telescopic cylinder (1041).

6. The cutting device for steel pipe piles after driving according to claim 1, characterized in that: It also includes a magnetic attraction mechanism (7) installed on the inner top wall of the cutting frame (3). The magnetic attraction mechanism (7) includes a winch installed on the inner top wall of the cutting frame (3) and an electromagnet installed on the hoisting rope of the winch. The bottom of the cutting frame (3) is also equipped with a locator parallel to the horizontal cutting line.

7. A method using the cutting device for steel pipe piles after driving according to any one of claims 1-6, characterized in that: The method includes: S1. Use hoisting equipment to hoist the cutting device (100) above the steel pipe pile (200) to be cut; S2. After adjusting the pile holding angle, slowly lower the cutting device (100) and make the steel pipe pile (200) to be cut pass through the pile holding mechanism (1) of the cutting device (100) and go deep into the cutting frame (3); S3. After being lowered to the designated height, the steel pipe pile (200) to be cut is held by the pile holding mechanism (1), thereby fixing the cutting device (100) on the steel pipe pile (200) to be cut, and then the hook of the hoisting equipment is released. S4. Use the leveling mechanism (2) to level the cutting frame (3) above the cutting device (100) and make it reach the target height; S5. Start the wire saw (6) and cut the extra-high part of the steel pipe pile (200) to be cut.

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