Device and method for cutting immersed steel pipe pile

Abstract

The device comprises a to-be-cut steel pipe pile, the cutting device comprises a pile embracing mechanism, a leveling mechanism and a cutting mechanism which are sequentially arranged from bottom to top, the pile embracing mechanism is used for fixing the cutting device to the top end of the to-be-cut steel pipe pile, and the leveling mechanism is used for adjusting the cutting mechanism to be horizontal. The cutting device is adopted to replace a traditional manual platform, cutting operation is carried out on steel pipe piles which cannot be sunk in place and steel pipe inclined piles which need to be cut due to the construction requirement of a bearing platform, in the aspect of safety, the operation risk of personnel is removed, the demand for manpower is reduced, construction becomes safe and reliable, meanwhile, the operation window period is prolonged, and the construction efficiency is improved. No matter whether tide exists or not and whether water submerges equipment and the steel pipe pile, continuous cutting operation can be carried out, and the pile cutting efficiency and safety are improved.

Description

Technical Field

[0001] The invention relates to the field of steel pipe pile cutting, and in particular to a device and method for cutting steel pipe piles after they are sunk. Background Art

[0002] During the steel pipe pile sinking construction process, many factors can cause problems in the steel pipe pile sinking. The complexity of geological conditions and the limitations of equipment performance often make it impossible for steel pipe piles to be successfully sunk to the predetermined position. Especially after the inclined pile sinking construction is completed, the steel pipe piles often tilt and exceed the designed elevation. The foundation construction has strict requirements on the elevation of the steel pipe piles, which means that the part that is higher than the designed elevation must be cut off.

[0003] At present, the cutting of steel pipe piles mainly relies on manual operation. The water cutting method is to build an above-water cutting platform, and workers carry cutting equipment to work on the platform. However, this method is severely restricted by factors such as water level changes, the time window suitable for construction is relatively narrow, and the construction efficiency is difficult to improve. At the same time, when it is necessary to cut the super-high part underwater, divers are required to carry cutting equipment to work underwater, which is not only inefficient, but also has a high safety risk. Therefore, a cutting device and method for steel pipe piles after sinking are proposed to solve the above problems. Summary of the invention

[0004] The main purpose of the present invention is to provide a device and method for cutting steel pipe piles after they are sunk, so as to solve the problems of low construction efficiency and high safety risks in the existing manual cutting method.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a cutting device and method for steel pipe piles after they are sunk, comprising a steel pipe pile to be cut, the cutting device comprising a pile holding mechanism, a leveling mechanism and a cutting mechanism arranged in sequence from bottom to top, wherein the pile holding mechanism is used to fix the cutting device on the top of the steel pipe pile to be cut, and the leveling mechanism is used to adjust the cutting mechanism to a horizontal state; The cutting mechanism comprises a cutting frame, a rope saw is arranged on the top of the cutting frame, a rope saw guide wheel is arranged on the side of the cutting frame, and a movable plane wheel is arranged on the bottom. The cutting rope of the rope saw forms a closed-loop horizontal cutting line at the bottom of the cutting frame through the rope saw guide wheel and the movable plane wheel.

[0006] In the preferred embodiment, rope saw guide wheels are arranged at the four corners of the side of the cutting frame, and the rope saw guide wheels arranged opposite to each other form a group. Two movable plane wheels are arranged at the bottom of the cutting frame, and the two movable plane wheels correspond to the two groups of rope saw guide wheels respectively.

[0007] In the preferred embodiment, the movable planar wheel includes two relatively arranged support plates, a slide rod is arranged between the two support plates, and a planar wheel assembly is slidably mounted on the outside of the slide rod. The planar wheel assembly can move back and forth toward the corresponding rope saw guide wheel through the slide rod.

[0008] In the preferred embodiment, the plane wheel assembly includes a mounting seat, a sleeve which can be slidably mounted on the outside of the slide rod is provided on the top of the mounting seat, a fixed plane wheel is provided at one end of the bottom of the mounting seat, a slide groove is provided at the other end, and through grooves that penetrate the mounting seat are provided on both sides of the slide groove, a displacement seat is movably installed in the slide groove, locking screws passing through the corresponding through grooves are provided on both sides of the displacement seat, a movable plane wheel parallel to the fixed plane wheel is provided at the bottom of the displacement seat, the cutting rope of the rope saw passes between the fixed plane wheel and the movable plane wheel, the end of the locking screw passes through the through groove and is threadedly mounted with a locking nut, and a telescopic spring that interferes with the displacement seat is also provided in the slide groove.

[0009] In the preferred embodiment, the interior of the slide bar is hollow; The movable plane wheel also includes a reset mechanism, which includes a reset screw rotatably arranged in the sliding rod, a movable groove connected to the interior of the sliding rod is arranged on the outside of the sliding rod, and a limit groove is arranged on the inner wall surface of the sliding rod. A rotating drive device connected to the reset screw is arranged on the outside of one of the support plates, and a reset internal thread shaft is arranged on the external thread of the reset screw. A reset block and a limit block are arranged on the outside of the reset internal thread shaft. The reset block passes through the movable groove and extends to the outside of the sliding rod, and the limit block slides in cooperation with the limit groove.

[0010] In a preferred embodiment, the rope saw comprises a mobile frame arranged on the top of the cutting frame, a rope saw main machine is movably arranged on the mobile frame, a driving wheel of the rope saw main machine is arranged horizontally, and two sets of guide wheels are symmetrically arranged thereon, and the guide wheels include an angle wheel, a horizontal guide wheel and a vertical guide wheel arranged in sequence; An oblique support frame is arranged between the bottom of the extended end of the moving frame and the side wall of the cutting frame.

[0011] In a preferred embodiment, the pile holding mechanism comprises a pile holding frame, in which a plurality of pile holding assemblies arranged in sequence up and down are arranged; The pile holding assembly comprises an arc-shaped fixed arm arranged inside the pile holding frame, both ends of the arc-shaped fixed arm are hingedly provided with pile holding arms, an opening and closing hydraulic cylinder is arranged between the outer side of the pile holding arm and the inner side of the pile holding frame, and both ends of the opening and closing hydraulic cylinder are hingedly provided; The leveling mechanism is a three-point support platform formed by three leveling cylinders, and the two ends of the three leveling cylinders are respectively hinged to the pile holding mechanism and the cutting frame through Hook hinges; A set of guide wheels are arranged at the top and bottom of the pile holding frame. Both sets of guide wheels can surround the steel pipe piles to be cut. The guide wheels include a telescopic cylinder fixed on the pile holding frame and a guide wheel arranged on the telescopic end of the telescopic cylinder.

[0012] In the preferred embodiment, the pile holding mechanism further includes a locking mechanism, which includes through holes arranged at the ends of the two pile holding arms of the pile holding assembly, and the two pile holding arms of the uppermost pile holding assembly are both provided with a connecting telescopic cylinder, which is arranged at the through hole, and the telescopic end of the connecting telescopic cylinder can pass through the through holes on all the pile holding arms in the vertical direction, and the pile holding frame is also provided with a locking assembly for tensioning and locking the two connecting telescopic cylinders; The locking assembly includes two baffles relatively arranged on the pile holding frame, a rotatable forward and reverse threaded screw and two limit sliding rods are arranged between the two baffles, a locking drive device is arranged on the outer side of one of the baffles, the output end of the locking drive device is transmission connected with the forward and reverse threaded screws, the forward and reverse threads of the forward and reverse threaded screws are both threaded with locking seats, and the locking seats are slidably mounted on the two limit sliding rods at the same time, and a plurality of locking arms are arranged on the side of the locking seat for connecting the telescopic cylinder.

[0013] In the preferred embodiment, it further comprises a magnetic attraction mechanism arranged on the inner top wall of the cutting frame, the magnetic attraction mechanism comprises a hoist arranged on the inner top wall of the cutting frame, and an electromagnet arranged on a hoisting rope of the hoist; A positioner parallel to the horizontal cutting line is also arranged at the bottom of the cutting frame.

[0014] The method comprises: S1, using a lifting device to lift a cutting device above a steel pipe pile to be cut; S2. After adjusting the pile holding angle, slowly lower the cutting device, and allow the steel pipe pile to be cut to pass through the pile holding mechanism of the cutting device and penetrate into the cutting frame; S3, after being lowered to the specified 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 releasing the hook of the lifting equipment; S4, using the leveling mechanism to level the cutting frame above the cutting device and make it reach the target height; S5. Start the rope saw and cut the super-high part of the steel pipe pile to be cut.

[0015] The present invention provides a device and method for cutting steel pipe piles after they are sunk. The cutting device is used to replace the traditional artificial platform, and cutting operations are performed on steel pipe piles that have not been sunk into place, and steel pipe inclined piles that need to be cut due to the requirements of foundation construction. In terms of safety, the operating risks of personnel are eliminated, which not only reduces the demand for manpower, but also makes the construction safe and reliable. At the same time, the operating window period is increased. Regardless of whether there is a tide or whether the water has submerged the equipment and the steel pipe piles, the cutting operation can be carried out continuously, thereby increasing the efficiency and safety of pile cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 This is a structural diagram of the connection between the cutting device of the present invention and the steel pipe pile to be cut; Figure 2 It is a structural diagram of the cutting device of the present invention; Figure 3 It is a schematic diagram of the upper part of the structure of the cutting device of the present invention; Figure 4 is a top view of the structure of the cutting device of the present invention; Figure 5 It is a structural diagram of the movable plane wheel of the present invention; Figure 6 It is a partial cross-sectional structural exploded view of the plane wheel assembly of the present invention; Figure 7 The present invention Figure 5 Half-section of the structure; Figure 8 It is a structural diagram of the pile holding mechanism of the present invention; Fig. 9 It is an exploded view of the partial structure of the pile holding mechanism of the present invention; Fig.10 is a structural diagram of the locking assembly of the present invention; In the figure: cutting device 100; pile holding mechanism 1; pile holding frame 101; guide holding wheel 102; pile holding assembly 103; arc fixed arm 1030; pile holding arm 1031; opening and closing hydraulic cylinder 1032; locking mechanism 104; through hole 1040; connecting telescopic cylinder 1041; locking assembly 1042; baffle 1043; limit slide bar 1044; positive and negative thread screw 1045; locking drive device 1046; locking seat 1047; locking arm 1048; leveling mechanism 2; cutting frame 3; rope saw guide wheel 4; moving plane wheel 5; support plate 501; slide bar 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; rotation drive device 5041; movable groove 5042; limiting groove 5043; reset internal thread shaft 5044; reset block 5045; limiting block 5046; rope saw 6; movable frame 601; rope saw main body 602; angle wheel 603; horizontal guide wheel 604; vertical guide wheel 605; diagonal support frame 606; magnetic suction mechanism 7; steel pipe pile 200 to be cut. DETAILED DESCRIPTION

[0017] Example 1 like Figure 1-10As shown, a cutting device for steel pipe piles after sinking includes a steel pipe pile 200 to be cut, and a cutting device 100 includes a pile holding mechanism 1, a leveling mechanism 2 and a cutting mechanism arranged in sequence from bottom to top, and the cutting mechanism includes a cutting frame 3, a rope saw 6 is arranged on the top of the cutting frame 3, a rope saw guide wheel 4 is arranged on the side of the cutting frame 3, and a movable plane wheel 5 is arranged on the bottom. The cutting rope of the rope saw 6 forms a closed-loop horizontal cutting line at the bottom of the cutting frame 3 via the rope saw guide wheel 4 and the movable plane wheel 5.

[0018] With such a design, when in 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 state by the leveling mechanism 2, and then the excess part of the steel pipe pile 200 to be cut is cut by the rope saw 6 and the horizontal cutting line formed at the bottom, thereby completing the automatic cutting work.

[0019] It should be noted that the cutting frame 3 is a steel frame structure and is the main cutting function carrier. The width of the cutting frame 3 can adapt to the inclination angle of the steel pipe pile 200 to be cut and the space required for leveling, and its two ends are open. When necessary, the cut steel pipe pile 200 can pass through the opening.

[0020] In the preferred embodiment, rope saw guide wheels 4 are provided at the four corners of the side of the cutting frame 3, and the rope saw guide wheels 4 arranged opposite to each other up and down form a group. In the present embodiment, the number of rope saw guide wheels 4 is four, and 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 groups of rope saw guide wheels 4 respectively. Such a design can utilize the corresponding settings of the two groups of rope saw guide wheels 4 and the two movable plane wheels 5 to guide the cutting rope of the rope saw 6 along the steel frame of the pile cutting platform to the cutting plane, while meeting its entry and exit needs on the rope saw 6.

[0021] Furthermore, the movable plane wheel 5 includes two relatively arranged support plates 501, a slide bar 502 is arranged between the two support plates 501, and a plane wheel assembly 503 is slidably mounted on the outside of the slide bar 502. The plane wheel assembly 503 can be moved back and forth toward the corresponding rope saw guide wheel 4 through the slide bar 502. Therefore, when the rope saw 6 is moving for cutting, the plane wheel assembly 503 can meet the needs of moving cutting of the horizontal cutting line by moving on the slide bar 502.

[0022] In the preferred embodiment, the flat wheel assembly 503 includes a mounting seat 5030, the top of which is provided with a sleeve 5031 which can be slidably mounted on the outside of the slide bar 502, so as to facilitate the mounting seat 5030 to slide back and forth on the slide bar 502, one end of the bottom of the mounting seat 5030 is provided with a fixed flat wheel 5032, and the other end is provided with a slide groove 5033, and both sides of the slide groove 5033 are provided with through grooves 5034 that penetrate the mounting seat 5030, and a displacement seat 5035 is movably installed in the slide groove 5033, and both sides of the displacement seat 5035 are provided with through grooves 5034 that penetrate the corresponding A locking screw 5036 passes through the 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 rope saw 6 passes through the fixed plane wheel 5032 and the movable plane wheel 5037, so as to clamp and limit the cutting rope of the rope saw 6 to prevent it from escaping during the cutting process. The end of the locking screw 5036 passes through the through groove 5034 and is threadedly fitted with a locking nut 5038. A telescopic spring 5039 that contacts the displacement seat 5035 is also provided in the slide groove 5033.

[0023] With such a design, the displacement seat 5035 can slide back and forth in the slide groove 5033 with the movable flat wheel 5037 under the restriction of the locking screw 5036, so as to facilitate the installation and adjustment of the cutting rope of the rope saw 6, and also facilitate the fine adjustment of the thickness of the cutting rope. At the same time, through the tension of the telescopic spring 5039, the displacement seat 5035 can be quickly reset after losing the external restriction, so as to complete the installation of the cutting rope of the rope saw 6. In addition, the position of the displacement seat 5035 can be fixed by the locking nut 5038. In a preferred embodiment, in order to realize the resetting of the planar wheel assembly 503 after the cutting is completed, the interior of the slide rod 502 is hollow.

[0024] The movable plane wheel 5 also includes a reset mechanism 504, which includes a reset screw 5040 rotatably arranged in the slide bar 502, and both ends of the reset screw 5040 are rotatably arranged in the slide bar 502 through bearings. The slide bar 502 is provided with a movable groove 5042 connected to the inside thereof on the outside, and a limit groove 5043 is provided on the inner wall surface of the slide bar 502. A rotating driving device 5040 is provided on the outside of one of the support plates 501. 5041 is provided. In the present embodiment, the rotation driving device 5041 is a driving motor, by which the reset screw 5040 can be driven to rotate in the sliding rod 502. The external thread sleeve of the reset screw 5040 is provided with a reset internal thread shaft 5044. The outside of the reset internal thread shaft 5044 is provided with a reset block 5045 and a limit block 5046. The reset block 5045 passes through the movable groove 5042 and extends to the outside of the sliding rod 502. The limit block 5046 is slidably matched with the limit groove 5043.

[0025] Such a design allows the reset internal threaded shaft 5044 to move back and forth on the reset screw 5040 as it rotates forward or reversely under the limiting action of the limit block 5046. Therefore, when resetting, the protruding reset block 5045 can be used to move the flat wheel assembly 503 to complete its resetting. After the resetting is completed, it is reversed at the same time and moves back to the origin to avoid affecting the normal cutting work.

[0026] In the preferred embodiment, the rope saw 6 includes a movable frame 601 arranged on the top of the cutting frame 3, and a rope saw main machine 602 is movably arranged on the movable frame 601. The driving wheel of the rope saw main machine 602 is arranged horizontally, and two sets of guide wheels are symmetrically arranged thereon. The guide wheels include an angle wheel 603, a horizontal guide wheel 604 and a vertical guide wheel 605 arranged in sequence. At the same time, the arrangement of the angle wheel 603, the horizontal guide wheel 604 and the vertical guide wheel 605 facilitates the adjustment of the shape of the cutting rope, while ensuring that it can effectively operate under the drive of the driving wheel.

[0027] It should be noted that the rope saw 6 is an existing technical means, and the rotation of its driving wheel and its movement on the moving frame 601 are both common technical means, so they will not be described in detail here.

[0028] A diagonal support frame 606 is arranged between the bottom of the extended end of the movable frame 601 and the side wall of the cutting frame 3. In order to ensure that the rope saw 6 has a sufficient cutting distance, the tail end of the movable frame 601 can be arranged to the outside of the cutting frame 3. At the same time, by arranging the diagonal support frame 606, its overall stability can be effectively ensured.

[0029] In the preferred embodiment, the pile holding mechanism 1 includes a pile holding frame 101. In this embodiment, the pile holding frame 101 is also a steel frame structure. A plurality of pile holding assemblies 103 arranged in sequence up and down are provided in the pile holding frame 101. In this embodiment, the number of the pile holding assemblies 103 is two.

[0030] The pile holding assembly 103 includes an arc-shaped fixed arm 1030 arranged on the inner side of the pile holding frame 101, and pile holding arms 1031 are hingedly provided at both ends of the arc-shaped fixed arm 1030. An opening and closing hydraulic cylinder 1032 is provided between the outer side of the pile holding arm 1031 and the inner side of the pile holding frame 101, and both ends of the opening and closing hydraulic cylinder 1032 are hingedly provided. Therefore, the two pile holding arms 1031 can be controlled by extending and retracting the opening and closing hydraulic cylinder 1032, thereby achieving the pile holding effect.

[0031] A group of guide wheels 102 are provided at the top and bottom of the pile holding frame 101. Both groups of guide wheels 102 can surround the steel pipe pile 200 to be cut. The two groups of guide wheels 102 can play a guiding and supporting role when it is installed 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, the number of the guide wheels 102 in the lower group is four, and the number of the guide wheels 102 in the upper group is three. The three guide wheels 102 in the upper group can avoid unnecessary interference with the leveling mechanism 2.

[0032] The guide holding wheel 102 specifically includes a telescopic cylinder fixed on the pile holding frame 101, and a guide wheel arranged on the telescopic end of the telescopic cylinder. The guide wheel can adjust its own distance through the telescopic cylinder.

[0033] In the preferred embodiment, the pile holding mechanism 1 also includes a locking mechanism 104, which includes a through hole 1040 arranged at the end of the two pile holding arms 1031 of the pile holding assembly 103, and the two pile holding arms 1031 of the uppermost pile holding assembly 103 are both provided with a connecting telescopic cylinder 1041, which is arranged at the through hole 1040, and its telescopic end can pass through the through holes 1040 on all the pile holding arms 1031 in the vertical direction, so that after effective pile holding is formed, the upper and lower pile holding assemblies 103 are connected as a whole, and the pile holding frame 101 is also provided with a locking assembly 1042 for pulling and locking the two connecting telescopic cylinders 1041.

[0034] The locking assembly 1042 includes two baffles 1043 relatively arranged on the pile holding frame 101, a rotatable forward and reverse threaded screw 1045 and two limit slide bars 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 driving motor with a brake, the output end of the locking drive device 1046 is transmission connected with the forward and reverse threaded screw 1045, the forward and reverse threads of the forward and reverse threaded screw 1045 are both threadedly sleeved with a locking seat 1047, the locking seat 1047 is slidably sleeved on the two limit slide bars 1044 at the same time, and a plurality of locking arms 1048 are arranged on the side of the locking seat 1047. In this embodiment, the number of the locking arms 1048 is two, which are used to connect the telescopic cylinder 1041.

[0035] With such a design, the forward and reverse screws 1045 can be rotated by driving the locking drive device 1046, so that the two locking seats 1047 thereon can move in relative or separate directions on the forward and reverse screws and under the restriction of the limit slide bar 1044, so that the two connected telescopic cylinders 1041 can be pulled toward each other through the locking arm 1048 to achieve a locking effect.

[0036] 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 two ends of the front, and another one is located in the middle of the rear. The two ends of the three leveling cylinders are respectively hinged to the pile holding mechanism 1 and the cutting frame 3 through Hook hinges.

[0037] The specific leveling method is: use the step-by-step method to find the leveling cylinder with the highest levelness in the cutting frame 3 as a reference, set the extension stroke of the other two legs according to the horizontal angles α and β of the rope surface, make the angles α and β equal to 0 to level the cutting frame 3, and then extend the three leveling legs proportionally and synchronously by adjusting the opening of the hydraulic proportional reversing valve to reach the target elevation y.

[0038] In the preferred embodiment, it also includes a magnetic suction mechanism 7 arranged on the inner top wall of the cutting frame 3, which is used to absorb the super-high part cut off to prevent it from naturally detaching. The magnetic suction mechanism 7 includes a winch arranged on the inner top wall of the cutting frame 3, and an electromagnet mounted on the lifting rope of the winch. The winch is used to adjust the use height of the electromagnet to facilitate the electromagnet to absorb the super-high part.

[0039] The bottom of the cutting frame 3 is also provided with a positioner parallel to the horizontal cutting line for positioning the cutting height.

[0040] In addition, it should be noted that by adjusting the overall length of the cutting frame 3, the device can cut a single pile or multiple piles at one time. When cutting multiple piles, the device can be hoisted and positioned to continuously cut for a long time. In addition, for the arrangement of the power control cabinet and the hydraulic oil control cabinet, the two can be set on the floating crane or the pier and the supporting pier.

[0041] Example 2 Further illustrate with reference to Example 1, Figure 1-10 The structure shown in FIG. 1 is a method for cutting a steel pipe pile after it is sunk using a device in the above embodiment, the method comprising: S1. Use a hoisting device 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 specified height, the steel pipe pile 200 to be cut is held by the pile holding mechanism 1, so that the cutting device 100 is fixed on the steel pipe pile 200 to be cut, and then the hook of the lifting equipment is released; S4, using 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 to cut the super-high part of the steel pipe pile 200 to be cut.

[0042] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A cutting device for steel pipe piles after they are sunk, comprising a steel pipe pile (200) to be cut, characterized in that: The cutting device (100) comprises a pile holding mechanism (1), a leveling mechanism (2) and a cutting mechanism which are arranged in sequence from bottom to top, wherein the pile holding mechanism (1) is used to fix the cutting device (100) on the top of a steel pipe pile (200) to be cut, and the leveling mechanism (2) is used to adjust the cutting mechanism to a horizontal state; The cutting mechanism comprises a cutting frame (3), a rope saw (6) is arranged on the top of the cutting frame (3), a rope saw guide wheel (4) is arranged on the side of the cutting frame (3), and a movable plane wheel (5) is arranged on the bottom. The cutting rope of the rope saw (6) forms a closed-loop horizontal cutting line at the bottom of the cutting frame (3) via the rope saw guide wheel (4) and the movable plane wheel (5).

2. The cutting device after steel pipe pile sinking according to claim 1 is characterized in that: Rope saw guide wheels (4) are arranged at the four corners of the side of the cutting frame (3), and the rope saw guide wheels (4) arranged opposite to each other up and down form a group. Two movable plane wheels (5) are arranged at the bottom of the cutting frame (3), and the two movable plane wheels (5) correspond to the two groups of rope saw guide wheels (4) respectively.

3. The cutting device after steel pipe pile sinking according to claim 2 is characterized in that: The movable plane wheel (5) comprises two support plates (501) arranged opposite to each other, a slide bar (502) is arranged between the two support plates (501), a plane wheel assembly (503) is slidably mounted on the outside of the slide bar (502), and the plane wheel assembly (503) can be moved back and forth toward the corresponding rope saw guide wheel (4) through the slide bar (502).

4. The cutting device after steel pipe pile sinking according to claim 3 is characterized by: The plane wheel assembly (503) comprises a mounting seat (5030), the top of the mounting seat (5030) is provided with a sleeve (5031) which can be slidably mounted on the outside of the slide bar (502), one end of the bottom of the mounting seat (5030) is provided with a fixed plane wheel (5032), the other end is provided with a slide groove (5033), and both sides of the slide groove (5033) are provided with through grooves (5034) that penetrate the mounting seat (5030), a displacement seat (5035) is movably installed in the slide groove (5033), and both sides of the displacement seat (5035) are provided with A locking screw (5036) is provided passing through the corresponding through groove (5034); a movable plane wheel (5037) parallel to the fixed plane wheel (5032) is provided at the bottom of the displacement seat (5035); a cutting rope of the rope saw (6) passes through between the fixed plane wheel (5032) and the movable plane wheel (5037); an end of the locking screw (5036) passes through the through groove (5034) and is threadedly sleeved with a locking nut (5038); and a telescopic spring (5039) is further provided in the slide groove (5033) and contacts the displacement seat (5035).

5. A cutting device for steel pipe piles after sinking according to claim 3 or 4, characterized in that: The interior of the slide bar (502) is hollow; The movable plane wheel (5) further comprises a reset mechanism (504), the reset mechanism (504) comprising a reset screw (5040) rotatably arranged in the slide bar (502), a movable groove (5042) communicating with the interior of the slide bar (502) being arranged outside the slide bar (502), a limit groove (5043) being arranged on the inner wall surface of the slide bar (502), a rotation driving device (5041) being transmission-connected to the reset screw (5040) being arranged outside one of the support plates (501), a reset internal thread shaft (5044) being sleeved on the external thread of the reset screw (5040), a reset block (5045) and a limit block (5046) being arranged outside the reset internal thread shaft (5044), the reset block (5045) penetrating the movable groove (5042) and extending to the exterior of the slide bar (502), and the limit block (5046) being slidably matched with the limit groove (5043).

6. The cutting device after steel pipe pile sinking according to claim 1 is characterized by: The rope saw (6) comprises a moving frame (601) arranged on the top of the cutting frame (3), a rope saw main body (602) being movably arranged on the moving frame (601), a driving wheel of the rope saw main body (602) being arranged horizontally, and two sets of guide wheels being symmetrically arranged thereon, the guide wheels comprising an angle wheel (603), a horizontal guide wheel (604) and a vertical guide wheel (605) being arranged in sequence; An oblique support frame (606) is provided between the bottom of the extended end of the movable frame (601) and the side wall of the cutting frame (3).

7. The cutting device after steel pipe pile sinking according to claim 1 is characterized by: The pile holding mechanism (1) comprises a pile holding frame (101), wherein a plurality of pile holding components (103) arranged in sequence up and down are arranged in the pile holding frame (101); The pile holding assembly (103) comprises an arc-shaped fixed arm (1030) arranged inside the pile holding frame (101), the two ends of the arc-shaped fixed arm (1030) are both hingedly provided with pile holding arms (1031), an opening and closing hydraulic cylinder (1032) is arranged between the outer side of the pile holding arm (1031) and the inner side of the pile holding frame (101), and the two ends of the opening and closing hydraulic cylinder (1032) are both hingedly provided; The leveling mechanism (2) is a three-point support platform formed by three leveling cylinders, and the two ends of the three leveling cylinders are respectively hinged to the pile holding mechanism (1) and the cutting frame (3) through Hook hinges; A set of guide wheels (102) are provided at the top and bottom of the pile holding frame (101), and both sets of guide wheels (102) can surround the steel pipe pile (200) to be cut. The guide holding wheel (102) comprises a telescopic cylinder fixedly arranged on the pile holding frame (101), and a guide wheel arranged on the telescopic end of the telescopic cylinder.

8. The cutting device after steel pipe pile sinking according to claim 7 is characterized by: The pile holding mechanism (1) further comprises a locking mechanism (104), the locking mechanism (104) comprising a through hole (1040) arranged at the end of two pile holding arms (1031) of the pile holding assembly (103), the two pile holding arms (1031) of the uppermost pile holding assembly (103) are both provided with a connecting telescopic cylinder (1041), the connecting telescopic cylinder (1041) is arranged at the through hole (1040), and its telescopic end can pass through the through holes (1040) on all the pile holding arms (1031) in the vertical direction, and the pile holding frame (101) is also provided with a locking assembly (1042) for tensioning and locking the two connecting telescopic cylinders (1041); The locking assembly (1042) comprises two baffles (1043) arranged opposite to each other on the pile holding frame (101); a rotatable forward and reverse threaded screw (1045) and two limit slide bars (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); an output end of the locking drive device (1046) is drivingly connected to the forward and reverse threaded screw (1045); a locking seat (1047) is threadedly sleeved on the forward and reverse threaded screws (1045); the locking seat (1047) is slidably sleeved on the two limit slide bars (1044) at the same time; and a plurality of locking arms (1048) are arranged on the side of the locking seat (1047) for connecting and communicating with the telescopic cylinder (1041).

9. The cutting device after steel pipe pile sinking according to claim 1 is characterized by: It also includes a magnetic attraction mechanism (7) arranged on the inner top wall of the cutting frame (3), the magnetic attraction mechanism (7) including a hoist arranged on the inner top wall of the cutting frame (3), and an electromagnet arranged on a hoisting rope of the hoist; A locator parallel to the horizontal cutting line is also provided at the bottom of the cutting frame (3).

10. A method for using the steel pipe pile cutting device after sinking according to any one of claims 1 to 9, characterized in that: The method includes: S1. Using a lifting device to lift 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 allow the steel pipe pile (200) to be cut to pass through the pile holding mechanism (1) of the cutting device (100) and penetrate into the cutting frame (3); S3, after being lowered to a specified 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 releasing the hook of the lifting device; S4, using the leveling mechanism (2) to level the cutting frame (3) above the cutting device (100) to a target height; S5, start the rope saw (6) to cut the super-high part of the steel pipe pile (200) to be cut.

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