Cutting device and dismantling method for underground structure

Abstract

The invention relates to the technical field of building construction equipment, and provides a cutting device for an underground structure and a dismantling method.The cutting device for the underground structure comprises at least two guide pipe piles, and guide through grooves are formed in the opposite side walls of every two adjacent guide pipe piles; a guide block is arranged in the guide pipe pile, the position of the guide block along the guide pipe pile is adjustable, and a guide pulley is arranged on the guide block; the pulley block comprises at least one fixed pulley and at least one movable pulley, and the position of the movable pulley relative to the fixed pulley is adjustable; the rope saw main machine is connected with a cutting rope, the cutting rope winds around the guide pulley, the fixed pulley and the movable pulley, and the cutting rope is arranged between the two adjacent guide pipe piles in a penetrating mode through the guide through grooves. The technical problems that in the prior art, when an underground structure is dismantled, a hoisting equipment overall pulling-out mode is adopted, the sum of the self weight of the underground structure and the side friction resistance of a soil body needs to be overcome, and the hoisting capacity is prone to being insufficient or even the hoisting equipment is damaged can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction equipment, and in particular to a cutting device and a demolition method for underground structures. Background Art

[0002] In order to achieve the purposes of support, retaining soil, waterproofing, etc., existing building structures often include certain underground structures, such as steel pipe piles, concrete piles, steel sheet piles, etc., but sometimes these underground structures need to be demolished for the needs of subsequent construction or new projects; since these underground structures are often driven into the ground vertically and have a considerable depth, it is difficult to use common demolition equipment, such as crushers and excavators for demolition. The existing demolition method is often to use lifting equipment to pull the underground structure out of the soil as a whole; but since the underground structure will rub against the surrounding soil, this demolition method requires the lifting capacity of the lifting equipment to be at least greater than the sum of the deadweight of the underground structure and the side friction of the soil, otherwise it is easy for the underground structure to be unable to be pulled out or even the lifting equipment to be damaged; and after the construction of some underground structures is completed, they will be connected as a whole through post-cast concrete wall panels, which further increases the difficulty of pulling out the underground structure as a whole, so it is necessary to develop a new underground structure demolition plan. Summary of the invention

[0003] The purpose of the present invention is to overcome the technical problems of the prior art of using a lifting device to pull out the underground structure as a whole when dismantling the underground structure, which requires overcoming the sum of the deadweight of the underground structure and the side friction of the soil, and is prone to insufficient lifting capacity or even damage to the lifting equipment. A cutting device and dismantling method for underground structures are provided.

[0004] In a first aspect, the present invention provides a cutting device for an underground structure, comprising:

[0005] At least two guide pipe piles, the opposite side walls of two adjacent guide pipe piles are both provided with guide grooves, the length of the guide grooves is arranged along the axis direction of the guide pipe piles; a guide block is arranged inside the guide pipe pile, the position of the guide block along the guide pipe pile is adjustable, and a guide pulley is arranged on the guide block;

[0006] A pulley block, the pulley block comprises at least one fixed pulley and at least one movable pulley, and the position of the movable pulley relative to the fixed pulley is adjustable;

[0007] The rope saw main body is connected with a cutting rope, the cutting rope passes around a guide pulley, a fixed pulley and a movable pulley, and the cutting rope passes through a guide groove and is arranged between two adjacent guide pipe piles. The cutting rope is used to cut objects between the two adjacent guide pipe piles.

[0008] The cutting device for underground structures of the present scheme is provided with a guide groove on the side wall of the guide pipe pile, and a movable guide block connected to a guide pulley is provided inside the guide pipe pile, so that the cutting rope of the rope saw main machine can extend into one of the guide pipe piles, bypass the guide pulley inside it, and then pass through its guide groove, pass into the guide groove of another guide pipe pile, bypass the guide pulley inside it, and finally return to the rope saw main machine, so that the cutting rope can be set between two adjacent guide pipe piles; and when the guide block moves along the axis of the guide pipe pile, the guide pulley will move therewith, and pull the cutting rope to move along the axis of the guide pipe pile, and then the rope saw main machine is turned on to drive the cutting rope to move along its axial direction, so that the object between the two adjacent guide pipe piles can be cut; and when the guide block pulls the cutting rope to move, the tensioning state of the cutting rope will change, so the distance between the movable pulley and the fixed pulley can be adjusted accordingly, thereby preventing the cutting rope from being tensioned too tightly and breaking, or being tensioned too loose and unable to complete the cutting.

[0009] As can be seen from the above, the present solution can pull the cutting rope along the axis of the guide pipe pile through the guide pipe pile and the movable guide block inside it, and provide the cutting rope with the intrusive force required for cutting, so that the cutting rope can cut the object between two adjacent guide pipe piles; therefore, as long as the guide pipe pile is inserted near the underground structure to be demolished so that the underground structure is located between two adjacent guide pipe piles, the underground structure can be cut into several sections along the axis direction of the guide pipe pile, and each section can be pulled out separately subsequently, which can reduce the lifting capacity required for each lifting operation, thereby greatly reducing the difficulty of pulling out the underground structure and reducing the risk of damage to the lifting equipment.

[0010] Preferably, the guide block is also connected to a negative pressure suction device, which is used to suck the mud and sand in the guide pipe pile; the negative pressure suction device is connected to a mud and sand conveying pipe, and the mud and sand conveying pipe extends to the outside of the guide pipe pile at one end away from the negative pressure suction device, and the mud and sand conveying pipe is used to transport the mud and sand out of the guide pipe pile.

[0011] Since the cutting rope will disturb the surrounding soil during cutting, debris such as sand, gravel, and cutting fragments will enter the guide pipe pile from the guide groove. If the amount of debris is too large, it will easily cause the guide pipe pile to be blocked. Therefore, this solution connects a negative pressure suction device and a mud and sand conveying pipe to the guide block to extract the debris in the guide pipe pile to the outside of the guide pipe pile, thereby preventing the guide pipe pile from being blocked and ensuring that the guide block can run smoothly in the guide pipe pile.

[0012] Preferably, the mud and sand conveying pipe comprises a steel wire hose.

[0013] This solution can ensure that the mud and sand conveying pipe has a good life and wear resistance, and prevent the mud and sand conveying pipe from being damaged, resulting in failure of the negative pressure suction device, and leakage of contents into the guide pipe pile.

[0014] Preferably, a winch is further included, the cable of the winch is connected to the guide block, and the rotation of the winch can drive the guide block to move along the axial direction of the guide pipe pile.

[0015] This solution recommends driving the guide block to move along the guide pipe pile by means of winch traction, which has the advantages of simple structure and reliable operation.

[0016] Preferably, a counterweight block is connected to the guide block.

[0017] This solution recommends connecting a counterweight block to the guide block so that the guide block can provide a greater cutting penetration force for the cutting rope, thereby enabling the cutting rope to cut the underground structure more efficiently and quickly.

[0018] Preferably, the counterweight block is detachably connected to the guide block.

[0019] This solution can facilitate operators to replace the counterweight block according to actual cutting conditions.

[0020] Preferably, it also includes a gear seat and a rack, the gear seat is rotatably connected with a gear and a movable pulley, the gear is meshed with the rack, and the rotation of the gear can drive the gear seat to move along the length direction of the rack, thereby driving the movable pulley to approach or move away from the fixed pulley.

[0021] This solution recommends a specific movable pulley position adjustment method, which can accurately adjust the relative position of the movable pulley and the fixed pulley, so as to better control the tension of the cutting rope and the cutting effect.

[0022] Preferably, the gear is connected to a drive motor.

[0023] This solution provides one of the specific gear driving methods.

[0024] Preferably, a guide bar is provided on one of the guide pipe pile and the guide block, and a guide groove is provided on the other of the guide pipe pile and the guide block. The length directions of the guide bar and the guide groove are both arranged along the axial direction of the guide pipe pile, and the guide bar is slidably connected to the guide groove.

[0025] This solution can guide the movement of the guide block in the guide pipe pile through the sliding connection of the guide bar and the guide groove, and can suppress the shaking of the guide block in the guide pipe pile, thereby preventing the guide block from hitting the inner wall of the guide pipe pile, causing negative impact on the cutting effect of the cutting rope, or even causing structural damage.

[0026] In a second aspect, the present invention provides a method for dismantling an underground structure, which is applied to a cutting device for an underground structure of the present invention, comprising the following steps:

[0027] S1. Insert guide pipe piles on at least two sides of the underground structure to be demolished, install the wire saw main machine and pulley block, and thread the cutting rope;

[0028] S2. Start the rope saw host, adjust the position of the guide block, and move the guide block along the axis of the guide pipe pile, thereby driving the cutting rope to move underground and cut the underground structure along the way, until the underground structure is cut into at least two sections; synchronously adjust the position of the movable pulley relative to the fixed pulley to keep the tension of the cutting rope within the specified working range;

[0029] S3. Use lifting equipment to pull out the sections of the underground structure from the ground one by one.

[0030] When demolishing an underground structure, the method for demolishing an underground structure of the present invention first cuts the underground structure into at least two sections by using the cutting device for the underground structure of the present invention, and then pulls out each section separately, which can reduce the lifting capacity required for a single lifting operation, thereby greatly reducing the difficulty of pulling out the underground structure and reducing the risk of damage to the lifting equipment.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. The present invention provides a cutting device for underground structures, which uses a guide pipe pile and a movable guide block inside the guide pipe pile to pull a cutting rope to move along the axis of the guide pipe pile, and provides the cutting rope with the intrusion force required for cutting, so that the cutting rope can cut the object between two adjacent guide pipe piles; therefore, as long as the guide pipe pile is inserted near the underground structure to be demolished, so that the underground structure is located between two adjacent guide pipe piles, the underground structure can be cut into several sections along the axis direction of the guide pipe pile, and each section can be pulled out separately later, which can reduce the lifting capacity required for each lifting operation, thereby greatly reducing the difficulty of pulling out the underground structure and reducing the risk of damage to the lifting equipment.

[0033] 2. The present invention provides a method for dismantling an underground structure. By using the cutting device for underground structures of the present invention to cut the underground structure into at least two sections, and then pulling out each section separately, the lifting capacity required for a single lifting operation can be reduced, thereby greatly reducing the difficulty of pulling out the underground structure and reducing the risk of damage to the lifting equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the main structure of a cutting device for underground structures of the present invention. Figure 1 ;

[0035] Figure 2 The schematic diagram of the top view of a cutting device for underground structures of the present invention is Figure 1 ;

[0036] Figure 3 It is a schematic diagram of the cross-sectional structure of a guide pipe pile of a cutting device for underground structures of the present invention;

[0037] Figure 4 It is a schematic structural diagram of a negative pressure suction device for a cutting device for underground structures of the present invention;

[0038] Figure 5 This is a schematic diagram of the main structure of a cutting device for underground structures of the present invention. Figure 2 ;

[0039] Figure 6 The schematic diagram of the top view of a cutting device for underground structures of the present invention is Figure 2 ;

[0040] Icons: 1-guide pipe pile; 11-guide slot; 2-guide block; 21-guide pulley; 22-counterweight block; 23-lifting ear; 31-fixed pulley; 32-moving pulley; 4-rope saw main machine; 41-cutting rope; 5-negative pressure suction device; 51-suction nozzle; 52-air conveying pipe; 53-mud and sand conveying pipe; 6-winch; 71-gear seat; 72-rack; 73-gear; 81-guide strip; 9-installation base; 10-underground structure. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with test examples and specific implementation methods. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0042] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0043] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0044] In addition, the expressions "first", "second", "third", etc. in the terms are only used to distinguish the description of the same or similar components, and should not be understood as emphasizing or implying the relative importance of specific components. In addition, in the description of the embodiments of the present invention, "several", "multiple", "a number" represent at least 2. It can be any situation of 2, 3, 4, 5, 6, 7, 8, 9, etc., and can even be more than 9.

[0045] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0046] Example 1

[0047] like Figures 1 to 6As shown, a cutting device for underground structures includes a mounting base 9, a guide pipe pile 1, a pulley block and a rope saw main unit 4; the number of the guide pipe piles 1 is at least two, and a guide groove 11 is provided on the opposite side walls of two adjacent guide pipe piles 1, the length of the guide groove 11 is set along the axial direction of the guide pipe pile 1, and the width of the guide groove 11 is wider than the diameter of the cutting rope 41; a guide block 2 is provided in the guide pipe pile 1, and the position of the guide block 2 along the guide pipe pile 1 is adjustable, and a guide pulley 21 is provided on the guide block 2; the mounting base 9 is arranged above the guide pipe pile 1, and a guide pulley 21 is provided on the guide block 2 The through holes corresponding to the pipe piles 1 are used to facilitate the operation of the guide pipe piles 1, such as placing the guide blocks 2, the cutting rope 41, and the cable; the pulley block is connected to the mounting base 9, and includes at least one fixed pulley 31 and at least one movable pulley 32, and the position of the movable pulley 32 relative to the fixed pulley 31 is adjustable; the rope saw main unit 4 is connected to the mounting base 9, and is connected with the cutting rope 41, the cutting rope 41 passes around the guide pulley 21, the fixed pulley 31 and the movable pulley 32, and the cutting rope 41 passes through the guide groove 11 and is arranged between two adjacent guide pipe piles 1, and the cutting rope 41 is used to cut objects between two adjacent guide pipe piles 1.

[0048] In the above embodiment, taking the case of including two guide pipe piles 1 as an example, Figure 1 and Figure 2 As shown, Figure 1 and Figure 2 The upper side is the left side, Figure 1 and Figure 2 The lower side is the right side, and the cutting rope 41 starts from the motor outlet turntable on the left side of the rope saw main machine 4, enters the left guide pipe pile 1 from the top opening of the left guide pipe pile 1 after turning through a group of fixed pulleys 31, then bypasses the guide pulley 21 in the left guide pipe pile 1, and then passes through the guide groove 11 of the left guide pipe pile 1, and then passes through the right guide pipe pile 1 from the guide groove 11 of the right guide pipe pile 1 and bypasses the corresponding guide pulley 21, and then passes through the guide pipe pile 1 from the top opening of the right guide pipe pile 1, bypasses a group of fixed pulleys 31, a group of movable pulleys 32, and a group of fixed pulleys 31 in turn, and returns to the motor inlet turntable on the right side of the rope saw main machine 4, forming a cutting rope 41 rotation cycle; it should be noted that the threading and winding order of the cutting rope 41 mentioned here is only for the convenience of understanding the path of the cutting rope 41, and does not mean that the cutting rope 41 must pass through each structure in the same order, and the arrangement position and number of the fixed pulleys 31 and the movable pulleys 32 can change according to the actual site requirements.

[0049] In the above embodiment, for the case of including three or more guide pipe piles 1, it is necessary to set two or more guide grooves 11 on some of the pipe piles. Taking the case of including three guide pipe piles 1 arranged side by side as an example, the guide pipe piles 1 on the left and right sides need to be provided with a guide groove 11 on the right and left sides respectively, and the middle guide pipe pile 1 needs to be provided with guide grooves 11 on both the left and right sides. In this way, the cutting rope 41 can be installed between the left guide pipe pile 1 and the middle guide pipe pile 1, and then pass through the middle guide pipe pile 1 to be installed between the right guide pipe pile 1 and the middle guide pipe pile 1.

[0050] It should be noted that Figure 1 The structures of the guide blocks 2 on both sides are different only to respectively show the structure of the guide block 2 itself and the structure of the guide block 2 connected to the negative pressure suction device 5. In actual working conditions, both guide blocks 2 on both sides can be connected to the negative pressure suction device 5, or both guide blocks 2 on both sides can be not connected to the negative pressure suction device 5.

[0051] In an optional embodiment, the implementation method of making the position of the guide block 2 in the guide pipe pile 1 adjustable includes but is not limited to: setting a slide rail and slider mechanism between the guide block 2 and the guide pipe pile 1, and the length direction of the slide rail is along the axial direction of the guide pipe pile 1; setting a gear rack mechanism between the guide block 2 and the guide pipe pile 1; directly making the outer wall of the guide block 2 and the inner wall of the guide pipe pile 1 gap fit; and setting a running device on the guide block 2, such as running wheels, tracks, and running feet.

[0052] In an optional embodiment, the guide block 2 is further connected to a negative pressure suction device 5, for example Figure 1 and Figure 4 As shown, the negative pressure suction device 5 includes a suction nozzle 51, a compressed air delivery pipe 52 and a mud and sand delivery pipe 53. The bottom opening of the suction nozzle 51 is used to suck mud and sand, and the top of the suction nozzle 51 is connected to one end of the mud and sand delivery pipe 53. The other end of the mud and sand delivery pipe 53 extends to the outside of the guide pipe pile 1 for spraying mud and sand; one end of the air delivery pipe 52 extends into the mud and sand delivery pipe 53, and the outlet faces upward, and the other end of the air delivery pipe 52 is connected to the air compressor. Compressed air is delivered to the inside of the air delivery pipe 52, which can drive the air in the mud and sand delivery pipe 53 to move upward, thereby forming a negative pressure in the mud and sand delivery pipe 53, so that mud and sand and other debris can be sucked into the suction nozzle 51 and delivered to the outside of the guide pipe pile 1 through the mud and sand delivery pipe 53.

[0053] In the above embodiment, the suction nozzle 51 is located at the bottom of the guide block 2, so that the mud and sand under the guide block 2 can be cleaned before the guide block 2 moves downward, preventing the guide block 2 from being stuck in the guide pipe pile 1 due to the mud and sand.

[0054] In an optional embodiment, the mud and sand conveying pipe 53 and the air conveying pipe 52 may both include steel wire hoses.

[0055] In an optional embodiment, a winch 6 is further included, and a cable of the winch 6 is connected to a lifting lug 23 on the guide block 2 . The rotation of the winch 6 can drive the guide block 2 to move along the axial direction of the guide pipe pile 1 .

[0056] In an optional embodiment, a counterweight block 22 is detachably connected to the guide block 2. At least two counterweight blocks 22 are connected to the lower part of the guide block 2 through threaded tie rods and nuts, and the number of counterweight blocks 22 can be increased or decreased according to actual use requirements, thereby changing the total weight of the counterweight blocks 22 to adapt to different cutting requirements.

[0057] In an optional embodiment, a rack 72 and a gear seat 71 are also provided on the mounting base 9, and the rack 72 is fixed to the mounting base 9; a walking wheel is provided at the bottom of the gear seat 71, so that it can move on the mounting base 9 along the direction of the rack 72; a gear 73 and a movable pulley 32 are rotatably connected to the gear seat 71, wherein the gear 73 is meshed with the rack 72, and the gear 73 is also connected to a driving motor, such as a stepping motor and a servo motor; the driving motor can drive the gear 73 to rotate, thereby driving the gear seat 71 to move along the length direction of the rack 72, and then driving the movable pulley 32 to approach or move away from the fixed pulley 31.

[0058] In an optional embodiment, a guide bar 81 is provided on one of the guide pipe pile 1 and the guide block 2, and a guide groove is provided on the other of the guide pipe pile 1 and the guide block 2. The length directions of the guide bar 81 and the guide groove are both provided along the axial direction of the guide pipe pile 1, and the guide bar 81 is slidably connected to the guide groove. Figure 3 As shown, round steel is provided inside the guide pipe pile 1 as a guide bar 81, and a guide groove of a corresponding shape is provided on the guide block 2, so that the movement of the guide block 2 can be guided by the mutual limitation of the guide groove and the guide bar 81; and two or more guide bars 81 can be provided, and are distributed in a centrally symmetrical or axially symmetrical manner relative to the axis of the guide pipe pile 1, so as to provide a more uniform guiding effect.

[0059] In an optional embodiment, the cutting rope 41 includes at least one of a diamond wire saw, a special-shaped stone cutting wire saw, and a combined cutting wire saw.

[0060] In an optional embodiment, the guide through groove 11 can be arranged throughout the length of the guide pipe pile 1, so as to maximize the cutting range of the cutting rope 41 when the length of the guide pipe pile 1 remains unchanged.

[0061] In an optional implementation, if the distances between multiple groups of guide pipe piles 1 are relatively close, the multiple groups of guide pipe piles 1 can share a common mounting base 9; for example Figure 5 and Figure 6As shown, there are two groups of guide pipe piles 1, each group of guide pipe piles 1 includes two guide pipe piles 1, and a mounting base 9 can be directly set above the four guide pipe piles 1, and the corresponding rope saw main machine 4 and pulley block are respectively set on the mounting base 9 for the two groups of guide pipe piles 1.

[0062] Example 2

[0063] A method for dismantling an underground structure, applied to a cutting device for an underground structure in Example 1, comprises the following steps:

[0064] S1. Insert guide pipe piles 1 on at least two sides of the underground structure 10 to be demolished. For example, for steel sheet piles, at least one guide pipe pile 1 can be inserted on both sides of the steel sheet pile. The angle between the axis of the guide pipe pile 1 and the horizontal plane is determined according to the cutting requirements. For example, when the underground structure 10 needs to be cut vertically, the axis of the guide pipe pile 1 can be made perpendicular to the horizontal plane; the number of guide pipe piles 1 is determined according to the number of cutting sections. For example, if a steel sheet pile needs to be cut into three sections, two groups of guide pipe piles 1 can be arranged along the length direction of the steel sheet pile, and each group of guide pipe piles 1 includes two guide pipe piles 1, so that two incisions can be made on the steel sheet pile to divide the steel sheet pile into three sections.

[0065] After inserting the guide pipe pile 1, the negative pressure suction device 5 can be used to clean the inside of the guide pipe pile 1 to prevent debris inside the guide pipe pile 1 from interfering with the movement of the guide block 2; if the guide block 2 is connected to the negative pressure suction device 5, the hole cleaning operation can also be performed simultaneously when the guide block 2 is moved in step S2.

[0066] Then, a mounting base 9, a rope saw main unit 4, a pulley block and other structures are arranged above the guide pipe pile 1, and a cutting rope 41 is passed through.

[0067] S2. Start the rope saw main unit 4 and adjust the position of the guide block 2 to move the guide block 2 along the axis of the guide pipe pile 1, for example, by pulling the guide block 2 along the guide pipe pile 1 by the winch 6, thereby driving the cutting rope 41 to move underground and cut the underground structure 10 along the way until the underground structure 10 is cut into at least two sections; in the process of moving the guide block 2, synchronously adjust the position of the movable pulley 32 relative to the fixed pulley 31, for example, start the drive motor to make the movable pulley 32 close to the fixed pulley 31, release part of the length of the cutting rope 41, thereby keeping the tension of the cutting rope 41 within the specified working range.

[0068] When adjusting the position of the guide block 2, the guide block 2 can be located at the top of the guide pipe pile 1 before the cutting operation starts, and the cutting rope 41 can be located above the underground structure 10, and then the guide block 2 can be moved downward from the top to the bottom of the guide pipe pile 1 to facilitate the winding of the cutting rope 41; the guide block 2 can also be located at the bottom of the guide pipe pile 1 before the cutting operation starts, and the cutting rope 41 can be located below the underground structure 10, and then the guide block 2 can be moved upward from the bottom to the top of the guide pipe pile 1, so that the underground structure 10 can be directly used to keep the cutting rope 41 taut, without using a counterweight to provide the intrusive force required for cutting.

[0069] S3. Use lifting equipment, such as a crawler crane and a vibrating hammer, to pull out the sections of the underground structure 10 from underground.

[0070] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cutting device for underground structures, characterized in that: include: At least two guide pipe piles (1), each of the two adjacent guide pipe piles (1) being provided with a guide groove (11) on its opposite side walls, the length of the guide groove (11) being arranged along the axial direction of the guide pipe pile (1); a guide block (2) being arranged inside the guide pipe pile (1), the position of the guide block (2) along the guide pipe pile (1) being adjustable, and a guide pulley (21) being arranged on the guide block (2); A pulley block, the pulley block comprising at least one fixed pulley (31) and at least one movable pulley (32), wherein the position of the movable pulley (32) relative to the fixed pulley (31) is adjustable; A rope saw main unit (4), the rope saw main unit (4) being connected with a cutting rope (41), the cutting rope (41) passing around the guide pulley (21), the fixed pulley (31) and the movable pulley (32), and the cutting rope (41) passing through the guide slot (11) and being arranged between two adjacent guide pipe piles (1), the cutting rope (41) being used for cutting an object between the two adjacent guide pipe piles (1).

2. A cutting device for underground structures according to claim 1, characterized in that: The guide block (2) is also connected to a negative pressure suction device (5), and the negative pressure suction device (5) is used to suck mud and sand in the guide pipe pile (1); the negative pressure suction device (5) is connected to a mud and sand conveying pipe (53), and one end of the mud and sand conveying pipe (53) away from the negative pressure suction device (5) extends to the outside of the guide pipe pile (1), and the mud and sand conveying pipe (53) is used to transport mud and sand out of the guide pipe pile (1).

3. A cutting device for underground structures according to claim 2, characterized in that: The mud and sand conveying pipe (53) comprises a steel wire hose.

4. A cutting device for underground structures according to any one of claims 1 to 3, characterized in that: It also comprises a winch (6), the cable of which is connected to the guide block (2), and the rotation of the winch (6) can drive the guide block (2) to move along the axial direction of the guide pipe pile (1).

5. A cutting device for underground structures according to any one of claims 1 to 3, characterized in that: A counterweight block (22) is connected to the guide block (2).

6. A cutting device for underground structures according to claim 5, characterized in that: The counterweight block (22) is detachably connected to the guide block (2).

7. A cutting device for underground structures according to any one of claims 1 to 3, characterized in that: The invention also comprises a gear seat (71) and a rack (72); a gear (73) and the movable pulley (32) are rotatably connected to the gear seat (71); the gear (73) is meshed with the rack (72); the rotation of the gear (73) can drive the gear seat (71) to move along the length direction of the rack (72), thereby driving the movable pulley (32) to approach or move away from the fixed pulley (31).

8. A cutting device for underground structures according to claim 7, characterized in that: The gear (73) is connected to a driving motor.

9. A cutting device for underground structures according to any one of claims 1 to 3, characterized in that: A guide bar (81) is provided on one of the guide pipe pile (1) and the guide block (2), and a guide groove is provided on the other of the guide pipe pile (1) and the guide block (2). The length directions of the guide bar (81) and the guide groove are both arranged along the axial direction of the guide pipe pile (1), and the guide bar (81) is slidably connected to the guide groove.

10. A method for dismantling an underground structure, characterized in that: A cutting device for underground structures as claimed in any one of claims 1 to 9, comprising the following steps: S1, inserting guide pipe piles (1) on at least two sides of the underground structure (10) to be demolished, installing a rope saw main unit (4) and a pulley block, and threading a cutting rope (41); S2, starting the rope saw main machine (4), adjusting the position of the guide block (2), so that the guide block (2) moves along the axis of the guide pipe pile (1), thereby driving the cutting rope (41) to move underground and cut the underground structure (10) along the way, until the underground structure (10) is cut into at least two sections; synchronously adjusting the position of the movable pulley (32) relative to the fixed pulley (31), keeping the tension of the cutting rope (41) within the specified working range; S3. Use lifting equipment to pull out the sections of the underground structure (10) from the ground respectively.

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