A diaphragm wall dismantling device and construction method

Abstract

The application relates to the technical field of underground structure demolition construction, and provides an underground diaphragm wall demolition device and a construction method, which comprises a drilling and cutting unit and a guide frame, the drilling and cutting unit comprises a support beam, is arranged on the guide frame, the support beam can move, and the guide frame limits the movement of the support beam; the drilling and cutting unit further comprises a drilling assembly and a cutting assembly, the drilling assembly comprises a drill rod and a drill bit, the drill rod is arranged below the support beam, a transmission assembly is arranged in the drill rod, and the drill bit is arranged at the bottom of the drill rod and connected with the transmission assembly; the cutting assembly comprises a cutting rope saw, the cutting rope saw is connected with the transmission assembly through a rope saw guide wheel; a guide ring, a fixed ring one and a fixed ring two are arranged on the guide frame, the guide ring is sleeved outside the drill rod and used for guiding and limiting the drill rod. The underground diaphragm wall can be quickly and non-destructively demolished, the device is simple to operate, the labor intensity of construction personnel is reduced, safety is good, and the construction efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of underground structure demolition construction technology, specifically to an underground continuous wall demolition device and construction method. Background Technology

[0002] With the continuous development of existing construction technologies and design concepts, the surrounding environment of subway foundation pit construction projects is becoming increasingly complex. The construction time of the main subway station and its ancillary structures and surrounding buildings varies, and the diaphragm walls and sealing walls used in the project earlier often need to be demolished later. Generally, permanent or temporary retaining structures are buried underground. Due to issues such as site, funding, and permits, construction is carried out in phases. In some cases, due to long intervals, it is impossible to construct the underground structures simultaneously. As a result, when the main structures need to be connected later, the original retaining system must be demolished. The subsequent environment will not have the good conditions for the earlier construction work. Constrained by space, equipment, structure, and time, the construction difficulty and risks are increased.

[0003] Demolition of diaphragm walls presents several challenges: as a new retaining structure adjacent to the foundation pit, it becomes a stress point in the pit's support system and cannot be removed during excavation; demolition after the subsequent structure is completed faces site limitations and lack of work space; and damage to both the existing adjacent structure and the later-built structure must be avoided. The chosen process must consider the feasibility of on-site implementation and various cost-benefit indicators. Commonly used reinforced concrete demolition methods include mechanical demolition, manual demolition, static blasting, and wire saw cutting. How to safely, quickly, economically, and without damage demolish diaphragm walls between structures has become a new challenge.

[0004] Therefore, in order to address the above problems, a device and construction method for dismantling underground diaphragm walls are proposed. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention develops a device and construction method for demolishing diaphragm walls. This invention enables the rapid and non-destructive demolition of diaphragm walls, and the device is simple to operate, reduces the labor intensity of construction workers, has good safety, and improves construction efficiency and economy.

[0006] To achieve the above objectives, the present invention employs the following technical solution:

[0007] A device for dismantling underground diaphragm walls, comprising:

[0008] The drilling and cutting unit includes a support beam, which is mounted on the guide frame and movably connected to it. The support beam is movable, and the guide frame is used to limit the movement of the support beam.

[0009] The drilling and cutting unit also includes a drilling assembly and a cutting assembly. The drilling assembly includes a drill rod and a drill bit. The drill rod is set under the support beam, and a transmission assembly is set inside the drill rod and the support beam. The drill bit is set at the bottom of the drill rod and connected to the transmission assembly. The cutting assembly includes a cutting wire saw. The cutting wire saw is connected to the transmission assembly through a wire saw guide wheel and is used to saw the underground continuous wall.

[0010] The guide frame is equipped with a guide ring, a first fixing ring, and a second fixing ring. The guide ring is sleeved on the outside of the drill rod and is used to guide and limit the drill rod.

[0011] Preferably, the guide frame also includes a diagonal brace and fixing holes. The diagonal brace is located on both sides of the bottom of the guide frame, and the fixing holes are located at the bottom of the diagonal brace. The diagonal brace is used to support the guide frame and the drilling and cutting unit, and the fixing holes are used to fix the guide frame, thereby improving the safety and stability of the device during use.

[0012] Preferably, the transmission assembly includes a drive shaft, a drive gear, a driven gear, a drill rod shaft, a drill rod shaft gear, and a positioning shaft gear. The drilling assembly also includes a drilling power component and a limiting disc. One end of the drive shaft is located at the output end of the drilling power component, and the other end of the drive shaft is equipped with a drive gear that meshes with the driven gear. The driven gear is located at one end of the drill rod shaft, and the other end of the drill rod shaft is connected to the drill bit. The drill rod shaft gear is located on the drill rod shaft and is coaxial with the drill rod shaft. The positioning shaft gear meshes with the drill rod shaft gear. The limiting disc is located inside the drill rod and sleeved on the drill rod shaft. The limiting disc is used to support and limit the drill rod. A bearing is provided between the limiting disc and the drill rod to reduce friction between the drill rod and the limiting disc when the drill rod rotates. The transmission assembly transmits power to the drilling assembly, improving the practicality of the device.

[0013] Preferably, the cutting assembly also includes a guide wheel positioning shaft, which is disposed on the inner wall of the drill rod. The wire saw guide wheel is connected to the positioning shaft gear and is coaxially disposed on the guide wheel positioning shaft. The positioning shaft gear drives the wire saw guide wheel to rotate, and the cutting wire saw is wound around the wire saw guide wheel. Driven by the rotation of the wire saw guide wheel, the wire saw cuts the diaphragm wall. The positioning shaft gear is driven to rotate by the drill rod shaft gear. The positioning shaft gear is connected to the wire saw guide wheel and can rotate simultaneously to drive the cutting wire saw to cut, thus improving the practicality of the device.

[0014] Preferably, two sets of drill rods and drill bits are provided, respectively, on both sides of the support beam. Each set of drill rods contains two sets of limiting discs, drill rod shaft gears, positioning shaft gears, wire saw guide wheels, and guide wheel positioning shafts. The cutting wire saw passes through the limiting disc and the outer wall of the drill rod, and is wound around the four wire saw guide wheels. The drill bits on both sides drill holes simultaneously, and under the action of the wire saw guide wheels, the cutting wire saw cuts the concrete between the two holes. Hole formation and cutting are carried out in parallel, which improves construction efficiency.

[0015] Preferably, the first fixing ring is located below the guide frame and on one side of the guide ring, while the second fixing ring is located above the guide frame and is used to connect the drilling and cutting unit and the guide frame.

[0016] Preferably, the device also includes a tensioning assembly, comprising a drive power component housed within a support beam. The drive power component's output end is equipped with an active belt connected to a rope drive shaft. This shaft is mounted on the support beam and coaxially connected to both rope wheels one and two. One end of rope one is wound around rope wheel one, and the other end is connected to a fixing ring one. One end of rope two is wound around rope wheel two, and the other end is connected to a fixing ring two. Rotation of rope wheel one causes rope two to exert tension on the fixing ring one, thereby driving the drilling and cutting unit to feed forward for drilling and cutting. Reverse rotation of rope wheel two causes rope two to exert tension on the fixing ring two, thereby driving the drilling and cutting unit to retract for the next drilling and cutting operation, thus improving the device's practicality and construction efficiency.

[0017] The present invention also provides a method for demolishing a diaphragm wall, including the aforementioned diaphragm wall demolition device, and further comprising the following steps:

[0018] S1. Determine the specific location of the underground continuous wall section that needs to be demolished, and conduct surveying and layout.

[0019] S2. Move the underground continuous wall demolition device to the demolition position, and first perform vertical cutting to cut out multiple vertical boreholes and vertical open surfaces;

[0020] S3. Then, the underground continuous wall demolition device is set on the side of the underground continuous wall to make horizontal cuts, cutting out multiple horizontal boreholes and multiple horizontal open surfaces, and the vertical boreholes are connected to the horizontal boreholes, and the horizontal open surfaces intersect with the vertical open surfaces.

[0021] S4. Connect the free wire saw through the vertical and horizontal drill holes to divide the underground continuous wall to be demolished into several independent separation blocks. On each separation block, diagonal holes are drilled along the open side of the underground continuous wall as hoisting rope holes.

[0022] S5. The crane is moved into position, the lifting rope is passed through the lifting rope hole, and the crane lifts the separated block away from its original position, completing the demolition of the diaphragm wall.

[0023] The effects described in the invention are merely those of the embodiments, and not all the effects of the invention. The above technical solution has the following advantages:

[0024] 1. This invention, by setting up a drilling and cutting unit, enables drilling and wire sawing to be carried out simultaneously during construction, creating a free surface and separating the cut blocks from the existing building structure. It also reduces the generation of broken debris during construction, decreases the labor intensity of construction workers, and improves construction efficiency.

[0025] 2. The device of the present invention is a small device that occupies little space, is easy to operate, has little contact with the existing building structure, will not cause damage to the existing building structure, has good construction quality, and is economical.

[0026] 3. By setting up a tensioning component, the present invention drives the drilling and cutting unit to move as a whole. When the drilling and cutting unit is drilling and cutting, the tension provides the power for feeding. After the drilling and cutting is completed, the drilling and cutting unit is pulled back to its original position, which improves the practicality of the device and the construction quality. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0028] Figure 1 This is a schematic diagram of the dismantling device according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the split structure of the drilling and cutting unit and the guide frame according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram illustrating the usage process of the dismantling device according to an embodiment of the present invention;

[0031] Figure 4 for Figure 1 A schematic diagram of the internal structure at point A in the middle;

[0032] Figure 5 for Figure 1 A schematic diagram of the internal structure at point B;

[0033] Figure 6 This is a partial structural diagram of the support beam in an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the vertical construction method according to an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the horizontal construction method according to an embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the lifting of the separated block according to an embodiment of the present invention.

[0037] In the diagram, 1. Drilling and cutting unit; 2. Guide frame; 3. Drill rod; 4. Drill bit; 5. Cutting wire saw; 6. Support beam; 71. Winding rope one; 72. Winding rope two; 8. Diaphragm wall; 9. Main structure of the station; 10. Free wire saw; 11. Lifting rope; 201. Diagonal brace; 202. Fixing hole; 203. Guide ring; 2041. Fixing ring one; 2042. Fixing ring two; 301. Drill rod shaft; 302. Limiting plate; 303. Drill rod shaft gear; 304. Positioning shaft gear; 305. Wire saw guide wheel; 306. Guide wheel positioning shaft; 307. Bearing; 601. Drive shaft; 602. Drive gear; 603. Driven gear; 6041. Winding rope wheel one; 6042. Winding rope wheel two; 605. Winding rope drive shaft; 606. Drive belt; 607. Drive power component; 608. Drilling power component; 801. Vertical drilling; 802. Vertical free face; 803. Horizontal drilling; 804. Horizontal free face; 805. Cutting line; 806. Separated block; 807. Internal reinforcing steel; 808. Hoisting rope threading hole. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0039] like Figure 1-6 As shown, a device and construction method for dismantling a diaphragm wall include:

[0040] The drilling and cutting unit 1 includes a support beam 6, which is mounted on and movably connected to the guide frame 2. The support beam 6 is movable, and the guide frame 2 limits the movement of the support beam 6. The drilling and cutting unit 1 also includes a drilling assembly and a cutting assembly. The drilling assembly includes a drill rod 3 and a drill bit 4. The drill rod 3 is mounted under the support beam 6, and a transmission assembly is installed inside the drill rod 3 and the support beam 6. The drill bit 4 is mounted at the bottom of the drill rod 3 and connected to the transmission assembly. The cutting assembly includes a wire saw 5, which is connected to the transmission assembly through a wire saw guide wheel 305. It is used to saw the diaphragm wall 8 to separate the diaphragm wall 8 from the main structure 9 of the station. The guide frame 2 is provided with a guide ring 203, a first fixing ring 2041, and a second fixing ring 2042. The guide ring 203 is sleeved on the outside of the drill rod 3 to guide and limit the movement of the drill rod 3.

[0041] In this embodiment, the guide frame 2 also includes a diagonal brace 201 and a fixing hole 202. The diagonal brace 201 is disposed on both sides of the bottom of the guide frame 2, and the fixing hole 202 is disposed at the bottom of the diagonal brace 201. Preferably, multiple fixing holes are disposed. The diagonal brace 201 is used to support the guide frame 2 and the drilling and cutting unit 1. Ground nails are disposed in the fixing holes 202 to fix the guide frame 2, thereby improving the safety and stability of the device during use.

[0042] In another embodiment, a guide groove is provided on the side of the guide frame 2 that contacts the support beam 6. The support beam 6 is slidably disposed with the guide groove. The length direction of the guide groove is consistent with the feed direction of the drilling and cutting unit 1, which supports and guides the movement of the support beam 6 and the drilling and cutting unit 1, thereby improving the stability and practicality of the device.

[0043] In this embodiment, the transmission assembly includes a drive shaft 601, a drive gear 602, a driven gear 603, a drill rod shaft 301, a drill rod shaft gear 303, and a positioning shaft gear 304. The drilling assembly also includes a drilling power component 608 and a limiting disk 302. One end of the drive shaft 601 is located at the output end of the drilling power component 608, and the other end of the drive shaft 601 is located at the drive gear 602. The drive gear 602 meshes with the driven gear 603. The driven gear 603 is located at one end of the drill rod shaft 301. The other end is connected to the drill bit 4. The drill rod shaft gear 303 is mounted on the drill rod shaft 301 and is coaxial with the drill rod shaft 301. The positioning shaft gear 304 meshes with the drill rod shaft gear 303. The limiting disk 302 is mounted inside the drill rod 3 and sleeved on the drill rod shaft 301. The limiting disk 302 is used to support and limit the drill rod 3. A bearing 307 is provided between the limiting disk 302 and the drill rod 3 to reduce the friction between the drill rod 3 and the limiting disk 302 when the drill rod 3 rotates. The transmission component transmits power to the drilling component, which improves the practicality of the device.

[0044] In this embodiment, the cutting assembly further includes a guide wheel positioning shaft 306, which is disposed on the inner wall of the drill rod 3. The wire saw guide wheel 305 is connected to the positioning shaft gear 304 and is coaxially disposed on the guide wheel positioning shaft 306. The positioning shaft gear 304 drives the wire saw guide wheel 305 to rotate, and the cutting wire saw 5 is wound around the wire saw guide wheel 305. Under the rotation of the wire saw guide wheel 305, the underground continuous wall is cut. The positioning shaft gear 304 is driven to rotate by the drill rod shaft gear 303. The positioning shaft gear 304 is connected to the wire saw guide wheel 305 and can rotate simultaneously to drive the cutting wire saw 5 to cut, thereby improving the practicality of the device.

[0045] In this embodiment, two sets of drill rods 3 and drill bits 4 are provided, respectively, on both sides of the support beam 6. Each set of drill rods 3 contains two sets of limiting discs 302, drill rod shaft gears 303, positioning shaft gears 304, wire saw guide wheels 305, and guide wheel positioning shafts 306. The cutting wire saw 5 passes through the limiting discs 302 and the outer wall of the drill rods 3, and is wound around the four wire saw guide wheels 305. At the same time, the cutting wire saw 5 is tensioned to cut better. The drill bits 4 on both sides drill holes simultaneously, and under the action of the wire saw guide wheels 305, the cutting wire saw 5 cuts the concrete between the two holes. Hole forming and cutting are carried out in parallel, which improves the construction efficiency.

[0046] In this embodiment, the first fixing ring 2041 is disposed below the guide frame 2 and located on one side of the guide ring 203, and the second fixing ring 2042 is disposed above the guide frame 2 for connecting the drilling and cutting unit 1 and the guide frame 2.

[0047] In this embodiment, a tensioning assembly is also included, comprising a driving power component 607, which is disposed within the support beam 6. The output end of the driving power component 607 is provided with an active belt 606, which is connected to a rope drive shaft 605. The rope drive shaft 605 is disposed on the support beam 6 and coaxially connected to both the first rope wheel 6041 and the second rope wheel 6042. One end of the first rope 71 is wound around the first rope wheel 6041, and the other end is connected to a fixing ring 2041. The second rope 71... One end of the 2 is wound around the second winch 6042, and the other end is connected to the second fixing ring 2042. The rotation of the first winch 6041 causes the first winch 71 to exert a tension on the first fixing ring 2041, thereby driving the drilling and cutting unit 1 to feed as a whole for drilling and cutting. The reverse rotation of the second winch 6042 causes the second winch 72 to exert a tension on the second fixing ring 2042, thereby driving the drilling and cutting unit 1 to retract as a whole for the next drilling and cutting, thus improving the practicality and construction efficiency of the device.

[0048] In this embodiment, the device is first moved to the construction site of the diaphragm wall to be demolished. Vertical drilling is then performed on the diaphragm wall. The guide frame 2 is temporarily fixed by passing ground nails through the fixing holes 202. Then, the drilling power unit 608 is activated, driving the drive shaft 601 to rotate. The drive shaft 601 drives the drive gear 602, which in turn drives the driven gear 603. The driven gear 603 drives the drill rod shaft 301 to rotate, which in turn drives the drill bit 4 at its bottom, thus drilling into the diaphragm wall. The rotation of the drill rod shaft 301 simultaneously drives the drill rod shaft gear 303, which in turn drives the positioning shaft gear 304. The positioning shaft gear 304 then drives the wire saw guide wheel 305 to rotate, causing the cutting wire saw 5 wound around it to cut. Simultaneously, the drive power unit 607 is activated. The output end of the drive power unit 607 drives the winch drive shaft 605 to rotate via the drive belt 606. The winch drive shaft 605 then drives the winch rope... Wheel 6041 and sheave wheel 6042 rotate. The rotation of sheave wheel 6041 causes the sheave rope 71 to exert tension on the fixed ring 2041, thereby driving the support beam 6 and the drilling and cutting unit 1 to move together towards the diaphragm wall. Simultaneously, the drilling and cutting unit 1 performs drilling and cutting operations on the diaphragm wall. After the support beam 6 reaches the bottom of the guide frame 2, the drive unit 607 is reversed, causing sheave wheels 6041 and 6042 to also reverse. Reversing the rotation causes the second rope 72 to exert tension on the second fixed ring 2042, thereby driving the support beam 6 and the drilling and cutting unit 1 back to their original positions, completing one vertical drilling and cutting operation. Then, the ground nail is removed, and the device is moved to the next construction position. The above actions are repeated for the next vertical construction. After the vertical drilling and cutting is completed, horizontal drilling and cutting are performed. The device is hoisted to the side of the underground continuous wall to be demolished, and horizontal drilling and cutting are performed in the same manner as the vertical drilling and cutting steps, completing the construction operation of the device. Example 2

[0049] like Figures 7 to 9 As shown, a method for demolishing a diaphragm wall includes the aforementioned diaphragm wall demolition device, and further includes the following steps:

[0050] S1. Determine the specific location of the underground continuous wall section that needs to be demolished, and conduct surveying and layout.

[0051] S2. Move the underground continuous wall demolition device to the demolition position, and first perform vertical cutting to cut out multiple vertical drill holes 801 and vertical open surfaces 802;

[0052] S3. Then, the underground continuous wall demolition device is set on the side of the underground continuous wall to make horizontal cuts, cutting out multiple horizontal drill holes 803 and multiple horizontal free surfaces 804. The vertical drill holes 801 are connected to the horizontal drill holes 803, and the horizontal free surfaces 804 intersect with the vertical free surfaces 802.

[0053] S4. A free wire saw 10 is connected through the vertical drilled hole 801 and the horizontal drilled hole 803. The cutting of the free wire saw 10 is a conventional technique. A cutting line 805 is made on the plane where the vertical drilled hole 801 and the horizontal drilled hole 803 are located. The underground continuous wall to be demolished is divided into several independent separation blocks 806 along the cutting line 805. An oblique through hole is made on each separation block 806 along the free side of the underground continuous wall as a hoisting rope hole 808. The hoisting rope hole 808 is surrounded by the internal steel bars 807 of the underground continuous wall 8 to improve the stability of hoisting.

[0054] S5. The crane is moved into position, the lifting rope 11 is passed through the lifting rope hole 808, and the crane lifts the separated blocks 806 one by one from their original positions, completing the demolition of the underground continuous wall.

[0055] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more unless otherwise explicitly specified.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0058] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for demolishing a diaphragm wall, characterized in that, The invention includes a diaphragm wall demolition device, the device comprising: The drilling and cutting unit (1) and the guide frame (2) are provided. The drilling and cutting unit (1) includes a support beam (6), which is mounted on the guide frame (2) and connected to the guide frame (2). The drilling and cutting unit (1) also includes a drilling assembly and a cutting assembly. The drilling assembly includes a drill rod (3) and a drill bit (4). The drill rod (3) is set under the support beam (6). A transmission assembly is set inside the drill rod (3) and the support beam (6). The drill bit (4) is set at the bottom of the drill rod (3) and connected to the transmission assembly. The cutting assembly includes a cutting wire saw (5). The cutting wire saw (5) is connected to the transmission assembly through a wire saw guide wheel (305) and is used to saw the underground continuous wall. The guide frame (2) is provided with a guide ring (203), a first fixing ring (2041) and a second fixing ring (2042). The guide ring (203) is sleeved on the outside of the drill rod (3) and is used to guide and limit the drill rod (3). The guide frame (2) also includes a diagonal brace (201) and a fixing hole (202). The diagonal brace (201) is located on both sides of the bottom of the guide frame (2), and the fixing hole (202) is located at the bottom of the diagonal brace (201). The transmission assembly includes a drive shaft (601), a drive gear (602), a driven gear (603), a drill rod shaft (301), a drill rod shaft gear (303), and a positioning shaft gear (304). The drilling assembly also includes a drilling power component (608) and a limiting plate (302). One end of the drive shaft (601) is located at the output end of the drilling power component (608), and the other end of the drive shaft (601) is located at the drive gear (602). The drive gear (602) meshes with the driven gear (603). The driven gear (603) is set at one end of the drill rod shaft (301), and the other end of the drill rod shaft (301) is connected to the drill bit (4). The drill rod shaft gear (303) is set on the drill rod shaft (301) and is coaxial with the drill rod shaft (301). The positioning shaft gear (304) meshes with the drill rod shaft gear (303). The limiting plate (302) is set inside the drill rod (3) and sleeved on the drill rod shaft (301). A bearing (307) is set between the limiting plate (302) and the drill rod (3). The cutting assembly also includes a guide wheel positioning shaft (306), which is set on the inner wall of the drill rod (3). The wire saw guide wheel (305) is connected to the positioning shaft gear (304) and is coaxially set on the guide wheel positioning shaft (306). The positioning shaft gear (304) drives the wire saw guide wheel (305) to rotate. The cutting wire saw (5) is wound around the wire saw guide wheel (305) and cuts the underground continuous wall under the rotation of the wire saw guide wheel (305). The method includes the following steps: S1. Determine the specific location of the diaphragm wall section that needs to be demolished; S2. Move the underground continuous wall demolition device to the demolition position, and first perform vertical cutting to cut out multiple vertical drill holes (801) and vertical open surfaces (802). S3. Then, the underground continuous wall demolition device is set on the side of the underground continuous wall to make horizontal cuts, cutting out multiple horizontal boreholes (803) and multiple horizontal free faces (804), and the vertical boreholes (801) are connected to the horizontal boreholes (803), and the horizontal free faces (804) intersect with the vertical free faces (802). S4. Connect the free wire saw (10) through the connected vertical and horizontal boreholes to divide the underground continuous wall to be demolished into several independent separate blocks (806). S5. The crane is moved into position and lifts several separate blocks (806) away from their original positions, completing the demolition of the underground continuous wall.

2. The method for demolishing a diaphragm wall according to claim 1, characterized in that: Two sets of drill rods (3) and drill bits (4) are provided, respectively on both sides of the support beam (6). Each set of drill rods (3) has two sets of limiting discs (302), drill rod shaft gears (303), positioning shaft gears (304), wire saw guide wheels (305) and guide wheel positioning shafts (306). The cutting wire saw (5) passes through the limiting discs (302) and the outer wall of the drill rods (3) and is wound around the four wire saw guide wheels (305).

3. The method for demolishing a diaphragm wall according to claim 2, characterized in that: Fixed ring one (2041) is set below the guide frame (2) and located on one side of the guide ring (203), while fixed ring two (2042) is set above the guide frame (2).

4. The method for demolishing a diaphragm wall according to claim 3, characterized in that: It also includes a tensioning assembly, including a drive power component (607), which is located inside the support beam (6). The output end of the drive power component (607) is provided with an active belt (606), which is connected to a rope drive shaft (605). The rope drive shaft (605) is located on the support beam (6) and is coaxially connected to both the first rope wheel (6041) and the second rope wheel (6042). One end of the first rope (71) is wound around the first rope wheel (6041), and the other end is connected to the first fixing ring (2041). One end of the second rope (72) is wound around the second rope wheel (6042), and the other end is connected to the second fixing ring (2042).

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