Static cutting breaking device for communication port of underground continuous wall and breaking construction method

Abstract

The application relates to a static cutting breaking device for a communication opening of an underground continuous wall and a breaking construction method, and belongs to the technical field of underground continuous wall construction. The structure of the breaking device comprises a rope saw machine, a rope saw cutting rope and an elastic traction rope. First and second connecting buckles are arranged at the two ends of the rope saw cutting rope respectively, and the first and second connecting buckles are used for butt-jointing the rope saw cutting rope to form a closed loop structure. A driving tensioning assembly is arranged at the output end of the rope saw machine. The rope saw cutting rope forming the closed loop structure is arranged around the driving tensioning assembly. One end of the elastic traction rope is provided with a connecting structure, the connecting structure is used for connecting the first connecting buckle or the second connecting buckle on the rope saw cutting rope, and the other end of the elastic traction rope is provided with a guiding and obstacle removing assembly. The application has the technical effects of reliably threading and removing obstacles in a complex hole and automatically unloading force protection.

Description

Technical Field

[0001] This application relates to the technical field of diaphragm wall construction, and in particular to a static cutting and breaking device and a breaking construction method for the connection port of a diaphragm wall. Background Technology

[0002] With the rapid development of underground space development projects, the manufacturing of reinforced concrete precast frames and other concrete structural components, as well as diaphragm walls, are widely used in construction scenarios such as foundation pit support and underground structure enclosure. To meet the needs of underground space connectivity, it is necessary to perform partial breaking and cutting operations on the pre-set connection openings of diaphragm walls. Static wire sawing, with its advantages of low vibration, high precision, and low structural disturbance, has gradually become the mainstream technology for breaking and cutting diaphragm wall connection openings.

[0003] Currently, most static cutting operations at the connection points of existing diaphragm walls are carried out using conventional wire saw equipment in conjunction with manual rope threading. However, conventional rope threading methods are prone to problems such as rope obstruction, inability to find the path independently, and incomplete obstacle clearing when the pre-embedded guide channel has bends, branches, or internal debris blockages, which seriously affect the construction progress.

[0004] Regarding the aforementioned technologies, the inventors believe that they suffer from drawbacks such as difficulty in threading the rope, low alignment accuracy, and poor obstacle clearing effect during the rope threading process. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a static cutting and demolition device and demolition construction method for the connection opening of a diaphragm wall.

[0006] Firstly, this application provides a static cutting and breaking device for the connection opening of a diaphragm wall, which adopts the following technical solution: A static cutting and demolition device for a diaphragm wall connection includes a wire saw, a wire saw cutting rope, and an elastic traction rope. The wire saw cutting rope has a first connecting buckle and a second connecting buckle at both ends, which are used to connect the wire saw cutting rope to form a closed-loop structure. The output end of the wire saw is equipped with a drive tensioning assembly. The wire saw cutting rope forming the closed-loop structure is wound around the drive tensioning assembly. One end of the elastic traction rope has a connecting structure for connecting the first or second connecting buckle on the wire saw cutting rope, and the other end of the elastic traction rope has a guide and obstacle-clearing assembly.

[0007] By adopting the above technical solution, and by setting up a wire saw machine, a wire saw cutting rope, and an elastic traction rope, the first and second connecting buckles at both ends of the wire saw cutting rope can be quickly connected to form a closed-loop structure. The drive tensioning component at the output end of the wire saw machine is used to wind, install, and power support the wire saw cutting rope of the closed-loop structure. At the same time, the connecting structure at one end of the elastic traction rope can be flexibly connected to the first or second connecting buckle, and the guide and obstacle clearing component at the other end can complete the pre-rope threading operation. This effectively solves the problems of difficult wire saw threading, low alignment accuracy, poor construction adaptability, and obstacle clearing inside the passage. It greatly improves the efficiency of rope threading and operational stability in the cutting construction of the underground continuous wall connection. The overall structure is easy to assemble and disassemble and has strong adaptability.

[0008] Preferably, the guide obstacle clearing assembly includes an obstacle-breaking cone, a guide mechanism, a guide rod, and a collecting spring. The obstacle-breaking cone is disposed at one end of the guide mechanism, and the other end of the guide mechanism is slidably disposed on the guide rod. One end of the collecting spring is fixedly disposed at the other end of the guide mechanism, and the other end of the collecting spring is fixedly disposed at the other end of the elastic traction rope. A snap fastener is provided on the end face of the obstacle-breaking cone near the guide mechanism.

[0009] By adopting the above technical solution, the guide and obstacle-clearing assembly, consisting of an obstacle-breaking cone, a guide mechanism, a guide rod, and a collection spring, relies on the obstacle-breaking function of the obstacle-breaking cone to clear obstacles in the passage in advance. The sliding cooperation between the guide mechanism and the guide rod enables multi-posture guidance and adjustment. The collection spring is used to collect and clear debris from the passage. At the same time, the locking buckle set on the end face of the obstacle-breaking cone can cooperate with the guide mechanism to complete the posture locking and switching. It is effectively adapted to rope threading operations in complex, curved, and multi-branch pre-buried passages, avoiding rope threading jams and blockages, and ensuring the stable passage of the elastic traction rope.

[0010] Preferably, the guiding mechanism includes a hinged flexible shaft and a guide sleeve. The hinged flexible shaft is formed by hinged multiple sets of short shafts. One end of the hinged flexible shaft is fixedly connected to the obstacle-breaking cone, and the other end of the hinged flexible shaft is fixedly connected to the guide rod. The guide sleeve is sleeved on the hinged flexible shaft, and one end of the guide sleeve is slidably connected to the guide rod. A snap-fit ​​buckle is provided on the end face of the other end of the guide sleeve, which is used to snap the snap-fit ​​buckle. An eccentric block is provided on one set of short shafts of the hinged flexible shaft near the obstacle-breaking cone.

[0011] By adopting the above technical solution, the guiding mechanism uses a hinged flexible shaft and a guide sleeve structure. The hinged flexible shaft is formed by multiple sets of short shafts hinged together, which has flexible bending performance and can adapt to channel bends and branch paths. The two ends of the hinged flexible shaft are respectively fixed with a barrier-breaking cone and a guide rod. The guide sleeve is slidably sleeved on the outside of the hinged flexible shaft. The locking buckle on the end face of the guide sleeve matches and locks with the locking buckle of the barrier-breaking cone. At the same time, an eccentric block is set on a set of short shafts near the barrier-breaking cone of the hinged flexible shaft. It can achieve autonomous deflection guidance by its own weight. It can automatically adapt to the turning of channel branches. At the same time, it can switch to straight travel mode through the locking structure, which greatly improves the path finding accuracy and rope threading versatility of complex channels.

[0012] Preferably, the surface of the obstacle-breaking cone is provided with a spiral slag discharge groove.

[0013] By adopting the above technical solution, a spiral slag discharge groove is opened on the surface of the obstacle-breaking cone. During the movement of the obstacle-breaking cone in the channel, the spiral slag discharge groove can cut, guide and discharge hard blocks, gravel and concrete protrusions in the channel, avoid hard objects from blocking the guide and obstacle-clearing components, effectively reduce the resistance of rope threading, ensure the smooth advancement of the guide and obstacle-clearing components, and improve the continuity and stability of obstacle breaking and clearing.

[0014] Preferably, the collecting spring is conical, with its large end fixedly connected to the guide sleeve and its small end fixedly connected to the other end of the elastic traction rope.

[0015] By adopting the above technical solution, the conical structure has a larger opening and catching area and elastic deformation space. During the traction and pull-back process, it can fully catch the remaining gravel, slag and debris in the channel and bring them out of the channel in a unified manner with the traction action. The clearance range is wider and the clearance effect is more thorough, effectively avoiding the impact of residual debris in the channel on the subsequent wire saw cutting rope layout and cutting operation.

[0016] Preferably, the guide sleeve has multiple sets of positioning rollers rotatably arranged inside, the positioning rollers abutting against the hinged flexible shaft, and the guide sleeve has multiple sets of guide rollers arranged outside.

[0017] By adopting the above technical solution, multiple sets of positioning rollers are installed inside the guide sleeve to abut against the articulated flexible shaft, forming a limiting support for the articulated flexible shaft, reducing frictional loss during the sliding and bending process of the articulated flexible shaft, and ensuring the stability and smooth sliding of the articulated flexible shaft. At the same time, multiple sets of guide rollers are installed outside the guide sleeve to reduce the contact friction between the guide sleeve and the inner wall of the channel, preventing the guide sleeve from scraping or getting stuck on the inner wall of the channel, further improving the smoothness of the overall rope threading and reducing equipment wear.

[0018] Preferably, the drive tensioning assembly includes a drive wheel, a tensioning wheel, a tensioning slider, and a hydraulic cylinder. The drive wheel is fixedly mounted on the output end of the wire saw. The tensioning slider is slidably mounted on the frame of the wire saw. The hydraulic cylinder is fixedly mounted on the frame of the wire saw and is used to push the tensioning slider to slide. The tensioning wheel is rotatably mounted on the tensioning slider, and a cam is fixedly mounted on the tensioning wheel. A slag discharge mechanism is provided on the tensioning slider, and the slag discharge mechanism abuts against the cam.

[0019] By adopting the above technical solution, the drive wheel can provide a stable cutting driving force for the wire saw cutting rope, and the hydraulic cylinder can push the tensioning slider to slide on the frame, thereby driving the tensioning wheel to precisely adjust the tension of the wire saw cutting rope and ensure uniform and stable cutting tension. At the same time, a cam is fixedly installed on the tensioning wheel, which can rotate synchronously with the tensioning wheel. Relying on the contact and cooperation between the cam and the slag removal mechanism on the tensioning slider, the cutting operation power is reused to provide reciprocating driving power for the slag removal mechanism, thus realizing the wire saw driving tension and automatic slag removal operations simultaneously.

[0020] Preferably, the slag discharge mechanism includes a slag discharge air box, a drive piston, a drive rod, a top-load spring, and a ventilation duct. The slag discharge air box is fixedly mounted on the tensioning slider. A partition is provided inside the slag discharge air box, and air outlets are provided at both ends of the partition. The partition divides the interior of the slag discharge air box into a drive chamber and a ventilation chamber. The drive piston is slidably mounted in the drive chamber. One end of the drive rod is fixedly mounted on the drive piston, and the other end of the drive rod abuts against the cam. The drive rod is slidably connected to the slag discharge air box. The top-load spring is sleeved on the other end of the drive rod. One end of the top-load spring is fixedly mounted on the slag discharge air box, and the other end of the top-load spring is fixedly mounted on the drive rod. One end of the ventilation duct is mounted on the slag discharge air box and communicates with the ventilation chamber. The other end of the ventilation duct extends towards the tensioning wheel. A first baffle is rotatably mounted at the air outlet in the ventilation chamber. Air inlets for connecting to the outside are provided at both ends of the drive chamber, and a second baffle is rotatably mounted at the air inlet in the drive chamber.

[0021] By adopting the above technical solution, the baffle divides the slag discharge air box into a drive chamber and a ventilation chamber. With the cam reciprocating against the drive rod and the top force spring returning to its original position, the drive piston can achieve stable reciprocating motion. Relying on the one-way opening and closing structure of the air inlet with a second baffle at both ends of the drive chamber and the air outlet with a first baffle of the ventilation chamber, one-way air intake and stable air supply are achieved. High-pressure airflow is continuously delivered to the tension wheel position through the ventilation pipeline, which blows away the mud and debris generated during cutting in real time, avoiding debris accumulation that may jam the wheel and wire saw, continuously ensuring a clean cutting environment, and improving cutting stability and equipment service life.

[0022] Preferably, the hydraulic cylinder is equipped with a pressure relief assembly, which includes a pressure relief valve body, a limiting slider, a driving wedge, a pressure relief spring, a retaining spring, and a venting pipe. The pressure relief valve body is fixedly mounted on the hydraulic cylinder and is at a right angle. A pressure relief chamber is provided within the pressure relief valve body and communicates with the hydraulic cylinder. The limiting slider is slidably mounted at one end of the pressure relief chamber, and one end of the retaining spring is fixedly mounted at one end of the pressure relief chamber and on the limiting slider. The driving wedge is slidably mounted at the other end of the pressure relief chamber, and one end of the pressure relief spring is fixedly mounted at the other end of the pressure relief chamber and on the driving wedge. The limiting slider abuts against the driving wedge. One end of the venting pipe is connected to one end of the ventilation pipe, and the other end of the venting pipe is connected to the other end of the pressure relief chamber.

[0023] By adopting the above technical solution, the ventilation pipeline connects the ventilation pipeline and the pressure relief chamber. The positive airflow generated by the slag discharge mechanism blows and drives the wedge block to move, which in turn moves the limit slider to seal the pressure relief chamber, ensuring the normal pressure holding operation of the hydraulic cylinder. When the equipment jams and stops or the airflow is interrupted, the pressure relief chamber is automatically opened by the elastic reset action of the unloading spring and the holding spring, realizing instantaneous pressure relief of the hydraulic cylinder and relaxation of the wire saw tension. This completes the emergency anti-rope breakage protection, effectively avoiding the risks of wire saw breakage, equipment damage, and personnel injury, and greatly improving the operational safety and fault self-adaptation capability of the device.

[0024] Secondly, this application provides a static cutting and demolition method for the connection opening of a diaphragm wall, which adopts the following technical solution: A method for statically cutting and breaking down the connection opening of a diaphragm wall includes the following steps: Step S1: During the reinforcement cage binding stage of the diaphragm wall, the pre-made guide pipe is embedded and fixed in the reinforcement cage along the design connection edge line. It is then hoisted into the trench along with the reinforcement cage and concrete is poured to form a diaphragm wall with embedded guide channels. Step S2: After the main structure of the underground continuous wall is poured and reaches the curing strength, send the end of the elastic traction rope close to the guide and clearing component into the channel of the guide tube. Drive the elastic traction rope to push and pull back and forth at the entrance of the guide tube. Use the guide and clearing component to realize the physical path finding of the branch intersections and bends in the channel. At the same time, use the guide and clearing component to catch the debris in the guide tube channel and bring it out of the channel, completing the full connection and internal cleaning of the guide channel. Step S3: After the guide clearing component and the end of the elastic traction rope have completely passed through the other end of the guide tube, remove the guide clearing component and use the connecting structure at the other end of the elastic traction rope to connect and lock it with the first or second connecting buckle at the front end of the wire saw cutting rope. Step S4: Pull the elastic traction rope at the outlet end of the guide tube to drag the wire saw cutting rope into and completely pass through the channel of the guide tube; after the wire saw cutting rope has completely passed out, disconnect the connection structure, remove the elastic traction rope, and connect the first connecting buckle at the head end of the wire saw cutting rope to the second connecting buckle at the tail end to form a closed-loop wire saw structure for driving. Step S5: Wrap the closed-loop wire saw structure formed in step S4 around the drive tensioning assembly at the output end of the wire saw machine, and adjust the drive tensioning assembly to make the wire saw cutting rope taut along the guide path of the guide tube to achieve the preset working tension required for static cutting. Step S6: Start the wire saw machine and make the closed-loop wire saw cutting rope grind and cut the diaphragm wall along the limit path of the guide tube; during the cutting process, if the wire saw cutting rope encounters hard steel bars or slag and gets stuck, causing a sudden increase in tension, drive the tensioning component to release the tension of the wire saw cutting rope and stop it abruptly to avoid the wire saw breaking; after the wall is cut, release the closed-loop structure and retrieve the wire saw machine and the wire saw cutting rope.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The guide and obstacle clearing assembly, consisting of an obstacle-breaking cone, a guide mechanism, a guide rod, and a collection spring, relies on the obstacle-breaking function of the obstacle-breaking cone to clear obstacles in advance. The sliding cooperation between the guide mechanism and the guide rod enables multi-posture guidance and adjustment. The collection spring is used to collect and clear debris from the passage. At the same time, the locking buckle set on the end face of the obstacle-breaking cone can cooperate with the guide mechanism to complete the posture locking and switching. It is effectively adapted to rope threading operations in complex bends and multi-branch pre-buried passages, avoiding rope threading jams and blockages, and ensuring the stable passage of the elastic traction rope.

[0026] 2. The partition divides the slag discharge air box into a drive chamber and a ventilation chamber. With the cam reciprocating against the drive rod and the top force spring returning to its original position, the drive piston can achieve stable reciprocating motion. Relying on the one-way opening and closing structure of the air inlet with a second baffle at both ends of the drive chamber and the air outlet with a first baffle in the ventilation chamber, one-way air intake and stable air supply are achieved. High-pressure airflow is continuously delivered to the tension wheel position through the ventilation pipeline, which can blow away the mud and debris generated during cutting in real time, avoiding debris accumulation and jamming of the wheel and wire saw, continuously ensuring a clean cutting environment, and improving cutting stability and equipment service life. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the working state of the wire saw machine and the wire saw cutting rope in the embodiment.

[0028] Figure 2 yes Figure 1 A magnified view of part A in the middle.

[0029] Figure 3 This is a cross-sectional schematic diagram of the internal structure of the slag discharge mechanism in the embodiment.

[0030] Figure 4 This is a cross-sectional schematic diagram of the internal structure of the stress-relief component in the embodiment.

[0031] Figure 5 This is a cross-sectional schematic diagram of the internal structure of the guide and obstacle removal component in the embodiment.

[0032] Figure 6 yes Figure 5 A magnified view of part B in the middle.

[0033] Figure 7 This is a schematic diagram of the structure of the first connecting buckle and the second connecting buckle in the embodiment.

[0034] Explanation of reference numerals in the attached drawings: 1. Wire saw machine; 2. Wire saw cutting rope; 21. First connecting buckle; 22. Second connecting buckle; 3. Elastic traction rope; 4. Guide and obstacle clearing assembly; 41. Obstacle-breaking cone; 411. Snap-fit ​​buckle; 412. Spiral slag discharge trough; 42. Guide mechanism; 421. Hinged flexible shaft; 4211. Eccentric block; 422. Guide sleeve; 4221. Snap-fit ​​buckle; 4222. Positioning roller; 4223. Guide roller; 43. Guide rod; 44. Collecting spring; 5. Drive tensioning assembly; 51. Drive wheel; 52. Tensioning wheel; 5 3. Tensioning slider; 54. Hydraulic cylinder; 55. Cam; 6. Slag discharge mechanism; 61. Slag discharge air box; 611. Drive chamber; 612. Ventilation chamber; 613. Air inlet; 62. Drive piston; 63. Drive rod; 64. Top force spring; 65. Ventilation pipe; 66. Baffle; 661. Air outlet; 67. First baffle; 68. Second baffle; 7. Unloading assembly; 71. Pressure relief valve body; 711. Pressure relief chamber; 72. Limit slider; 73. Drive wedge; 74. Unloading spring; 75. Holding spring; 76. Ventilation pipe. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0036] Example 1: This application discloses a static cutting and breaking device for the connection opening of a diaphragm wall. (Refer to...) Figure 1 , Figure 5 , Figure 6 and Figure 7The system includes a wire saw machine 1, a wire saw cutting rope 2, and an elastic traction rope 3. The wire saw cutting rope 2 has a first connecting buckle 21 and a second connecting buckle 22 at both ends, which are used to connect the wire saw cutting rope 2 to form a closed loop structure. The output end of the wire saw machine 1 is provided with a drive tensioning component 5. The wire saw cutting rope 2 forming the closed loop structure is wound around the drive tensioning component 5. One end of the elastic traction rope 3 is provided with a connecting structure, which is used to connect the first connecting buckle 21 or the second connecting buckle 22 on the wire saw cutting rope 2. The other end of the elastic traction rope 3 is provided with a guide and obstacle clearing component 4.

[0037] Reference Figure 1 , Figure 5 , Figure 6 and Figure 7 During rope threading operations, the elastic traction rope 3 is pushed by an external force-applying device. A connection is established between the connecting structure at one end of the elastic traction rope 3 and the first connecting buckle 21 or the second connecting buckle 22 on the wire saw cutting rope 2. The connecting structure is a connecting sleeve with internal threads. The first connecting buckle 21 and the second connecting buckle 22 have threads that mate with the internal threads of the connecting sleeve. The elastic traction rope 3 transmits pushing and pulling forces, driving the guide and obstacle-clearing component 4 to complete the passage operation within the channel. The guide and obstacle-clearing component 4 completes the probing and clearing operations within the channel. Obstacles and path guidance are used to guide the wire saw cutting rope 2 to complete the rope laying. After the wire saw cutting rope 2 is laid, the first connecting buckle 21 and the second connecting buckle 22 are used to connect the wire saw cutting rope 2 to form a closed loop structure. The wire saw cutting rope 2 forming the closed loop structure is then wound around the drive tensioning component 5 at the output end of the wire saw machine 1. The wire saw machine 1 outputs power to the drive tensioning component 5, and the drive tensioning component 5 drives and tensions the closed loop wire saw cutting rope 2, so that the wire saw cutting rope 2 obtains the cutting power of cyclic motion and the tension force required for operation, thereby carrying out static cutting operation.

[0038] Reference Figure 1 , Figure 5 , Figure 6 and Figure 7The guide and obstacle clearing assembly 4 includes an obstacle-breaking cone 41, a guide mechanism 42, a guide rod 43, and a collecting spring 44. The obstacle-breaking cone 41 is disposed at one end of the guide mechanism 42, and the other end of the guide mechanism 42 is slidably disposed on the guide rod 43. One end of the collecting spring 44 is fixedly disposed at the other end of the guide mechanism 42, and the other end of the collecting spring 44 is fixedly disposed at the other end of the elastic traction rope 3. The collecting spring 44 is conical, with its large end fixedly connected to the guide sleeve 422 and its small end fixedly connected to the other end of the elastic traction rope 3. The collecting spring 44 is used to catch debris inside the channel. A latch 411 is provided on the end face of the obstacle-breaking cone 41 near the guide mechanism 42. The obstacle-breaking cone 41 and the latch 41 are connected to each other. The latch 411 is rotatably connected. A torsion spring is provided at one end of the latch 411, which provides force for the latch 411 to engage and disengage. The other end of the latch 411 has a bent portion. An opening is provided in the middle of the latch 411, and a sliding channel plate extending outward is provided at one end of the opening. The guide mechanism 42 includes a hinged flexible shaft 421 and a guide sleeve 422. The hinged flexible shaft 421 is formed by hinged multiple short shafts. One end of the hinged flexible shaft 421 is fixedly connected to the obstacle-breaking cone 41, and the other end of the hinged flexible shaft 421 is fixedly connected to the guide rod 43. The guide sleeve 422 is sleeved on the hinged flexible shaft 421, and one end of the guide sleeve 422 is slidably connected to the guide rod 43. The end face of the other end of the guide sleeve 422... A latch 4221 is provided on the upper part, which is used to engage with the latch 411. The latch 411 and the latch 4221 adopt a two-stage push-press engagement method. When the guide sleeve 422 pushes the latch 411 forward for the first time, the latch 4221 and the latch 411 are engaged and locked. When the guide sleeve 422 pushes the latch 411 forward again, it breaks through the opening on the latch 411 and unlocks and separates the latch 4221 and the latch 411. The latch 4221 moves towards the latch 411 and abuts against the other end of the latch 411, causing the latch 411 to rotate around the connection. After the latch 4221 moves to the position, the latch 411 is reset by the torsion spring, so that the latch 411 is engaged. The bent part of 11 engages with the snap fastener 4221. The snap fastener 4221 moves again and slides out along the sliding channel plate on the snap fastener 411. After the snap fastener 4221 slides out of the sliding channel plate, the snap fastener 411 is reset by the torsion spring, causing the snap fastener 4221 to enter the snap fastener 411 opening. The snap fastener 4221 is removed and unlocked through the snap fastener 411 opening. Multiple sets of positioning rollers 4222 are rotatably arranged inside the guide sleeve 422. The positioning rollers 4222 abut against the hinged flexible shaft 421. Multiple sets of guide rollers 4223 are arranged outside the guide sleeve 422. An eccentric block 4211 is arranged on a set of short shafts near the barrier-breaking cone 41 of the hinged flexible shaft 421. A spiral slag discharge groove 412 is opened on the surface of the barrier-breaking cone 41.

[0039] Reference Figure 1 , Figure 5 , Figure 6 and Figure 7 When the guide clearing component 4 moves into the pre-embedded guide channel along the elastic traction rope 3, the spiral slag discharge groove 412 on the surface of the obstacle-breaking cone 41 cuts and discharges hard objects in the channel. When no branch is encountered, the guide rod 43 and the hinged flexible shaft 421 slide relative to each other by gravity. The hinged flexible shaft 421 slides out of the guide sleeve 422. The hinged flexible shaft 421 can be deflected by the eccentric block 4211. When a branch is encountered, the deflected obstacle-breaking cone 41 can resist the branch to achieve a change in direction. If it is not necessary to enter the current branch, the elastic traction rope 3 pulls the guide sleeve 422 to slide along the guide rod 43. The snap-fit ​​buckle 4221 at the end of the guide sleeve 422 pushes the snap-fit ​​buckle 411 to complete the locking. The hinged flexible shaft 421 is locked in a straight line, bringing the obstacle-breaking cone 41 out of the current branch position and continuing towards the next hole. When it is necessary to achieve [further action], [further action is needed]. During the turning motion, the elastic traction rope 3 is shaken, and the elastic force of the collecting spring 44 drives the guide sleeve 422 to slide along the guide rod 43. The guide sleeve 422 is pushed further towards the obstacle-breaking cone 41, the locking buckle 4221 and the locking buckle 411 are unlocked, and the hinged flexible shaft 421 returns to its deflectable state. The turning motion can be completed again by relying on the gravity of the eccentric block 4211. The multiple sets of positioning rollers 4222 inside the guide sleeve 422 abut against the hinged flexible shaft 421, which plays a role in limiting and sliding support for the hinged flexible shaft 421. The multiple sets of guide rollers 4223 outside the guide sleeve 422 reduce the frictional resistance between the guide sleeve 422 and the inner wall of the channel. During the pullback of the elastic traction rope 3, the cone-shaped collecting spring 44 undergoes elastic deformation, catches the debris inside the channel, and brings the debris out of the channel along with the elastic traction rope 3, completing the channel clearing operation.

[0040] Reference Figures 1 to 4The drive tensioning assembly 5 includes a drive wheel 51, a tensioning wheel 52, a tensioning slider 53, and a hydraulic cylinder 54. The drive wheel 51 is fixedly mounted on the output end of the wire saw machine 1. The tensioning slider 53 is slidably mounted on the frame of the wire saw machine 1. The hydraulic cylinder 54 is fixedly mounted on the frame of the wire saw machine 1 and is used to push the tensioning slider 53 to slide. The tensioning wheel 52 is rotatably mounted on the tensioning slider 53, and a cam 55 is fixedly mounted on the tensioning wheel 52. A slag removal mechanism 6 is provided on the tensioning slider 53, and the slag removal mechanism 6 abuts against the cam 55. The wire saw cutting rope 2 with a closed-loop structure is wound around the drive tensioning assembly 5. The output end of the wire saw machine 1 drives the drive wheel 51 to rotate, and the drive wheel 51 drives the wire saw cutting rope 2 to circulate by friction. The circular motion provides the cutting drive force for the wire saw cutting rope 2. The hydraulic cylinder 54 outputs thrust through the external oil circuit to push the tension slider 53 to slide on the frame of the wire saw machine 1. The sliding tension slider 53 drives the tension wheel 52, which is rotated on it, to move synchronously. The tension wheel 52 presses against the wire saw cutting rope 2, thereby adjusting the tension of the wire saw cutting rope 2 so that the wire saw cutting rope 2 obtains the tension force required for the cutting operation. During the operation of the wire saw cutting rope 2, the tension wheel 52 is driven to rotate by friction. When the tension wheel 52 rotates, it drives the cam 55, which is fixed on it, to rotate synchronously. The profile of the rotating cam 55 continuously reciprocates against the slag discharge mechanism 6 on the tension slider 53, providing the reciprocating motion drive input for the slag discharge mechanism 6.

[0041] Reference Figures 1 to 4 The slag discharge mechanism 6 includes a slag discharge air box 61, a drive piston 62, a drive rod 63, a top spring 64, and a ventilation pipe 65. The slag discharge air box 61 is fixedly mounted on the tension slider 53. A partition 66 is provided inside the slag discharge air box 61, and air outlets 661 are provided at both ends of the partition 66. The partition 66 divides the interior of the slag discharge air box 61 into a drive chamber 611 and a ventilation chamber 612. The drive piston 62 is slidably mounted in the drive chamber 611. One end of the drive rod 63 is fixedly mounted on the drive piston 62, and the other end of the drive rod 63 abuts against the cam 55. The drive rod 63 is slidably connected to the slag discharge air box 61. A force spring 64 is sleeved on the other end of the drive rod 63. One end of the force spring 64 is fixedly mounted on the slag discharge air box 61, and the other end of the force spring 64 is fixedly mounted on the drive rod 63. One end of the ventilation pipe 65 is mounted on the slag discharge air box 61, and the ventilation pipe 65 is connected to the ventilation cavity 612. The other end of the ventilation pipe 65 extends toward the tension wheel 52. A first baffle 67 is rotatably mounted at the air outlet 661 in the ventilation cavity 612. Both ends of the drive cavity 611 are provided with air inlets 613 for connecting to the outside. A second baffle 68 is rotatably mounted at the air inlet 613 in the drive cavity 611.

[0042] Reference Figures 1 to 4During operation, the rotating cam 55 reciprocates against the drive rod 63. The drive rod 63 overcomes the elastic force of the top spring 64, driving the drive piston 62 to reciprocate within the drive chamber 611 of the slag discharge air box 61. The elastic force of the top spring 64 pulls the drive rod 63 against the cam 55, thus realizing the reciprocating cyclic action of the drive piston 62. When the drive piston 62 moves to one end, the volume inside the drive chamber 611 at the corresponding end decreases, and the air pressure inside the chamber increases. The second baffle 68 on that side closes under the action of air pressure, and the airflow pushes open the first baffle 67 at the air outlet 661 on the corresponding side partition 66. The gas enters the ventilation chamber 612 from the drive chamber 611 and is then transported to the ventilation duct 65. At position 52 of the tensioning wheel, the mud and debris at that position are blown away and discharged. At the same time, the volume on the other side of the drive chamber 611 increases, creating a negative pressure. The second baffle 68 on this side opens under the action of negative pressure, and external air is supplied into the drive chamber 611 through the air inlet 613. The first baffle 67 on this side closes under the action of negative pressure to prevent gas backflow. When the drive piston 62 moves in the opposite direction, the states of the two chambers are interchanged, and the other end completes the compressed air output and air supply action. Relying on the one-way opening and closing action of the first baffle 67 and the second baffle 68, it is ensured that air can only flow from the drive chamber 611 to the ventilation chamber 612, continuously supplying airflow to the ventilation pipe 65, and realizing continuous discharge of slag from the tensioning wheel 52.

[0043] Reference Figures 1 to 4 The hydraulic cylinder 54 is equipped with a force-relieving assembly 7, which includes a pressure relief valve body 71, a limit slider 72, a drive wedge 73, a force-relieving spring 74, a retaining spring 75, and a vent pipe 76. The pressure relief valve body 71 is fixedly mounted on the hydraulic cylinder 54 and is at a right angle. A pressure relief chamber 711 is provided inside the pressure relief valve body 71 and is connected to the hydraulic cylinder 54. The limit slider 72 is slidably mounted at one end of the pressure relief chamber 711, and one end of the retaining spring 75 is fixedly mounted. A retaining spring 75 is fixedly mounted on a limiting slider 72 at one end of the pressure relief chamber 711; a driving wedge 73 is slidably mounted at the other end of the pressure relief chamber 711; one end of a stress relief spring 74 is fixedly mounted at the other end of the pressure relief chamber 711, and the other end of the stress relief spring 74 is fixedly mounted on the driving wedge 73; the limiting slider 72 abuts against the driving wedge 73; one end of a vent pipe 76 is connected to one end of a ventilation pipe 65, and the other end of a vent pipe 76 is connected to the other end of the pressure relief chamber 711.

[0044] Reference Figures 1 to 4During normal cutting operations, the slag removal mechanism 6 operates continuously, generating a continuous positive airflow inside the ventilation pipe 65. This airflow travels directly through the ventilation pipe 76 to the drive wedge 73 inside the pressure relief chamber 711. The airflow force overcomes the elasticity of the unloading spring 74, pushing the drive wedge 73 to slide forward inside the pressure relief chamber 711. The forward-moving drive wedge 73 pushes against the limiting slider 72, causing the limiting slider 72 to overcome the elasticity of the holding spring 75 and move towards the hydraulic cylinder 54, blocking the communication channel between the pressure relief chamber 711 and the hydraulic cylinder 54. This keeps the pressure relief valve body 71 in a closed state, allowing the hydraulic cylinder 54 to maintain pressure normally and continuously push the tension slider 53 to maintain a stable tension of the wire saw cutting rope 2. When the wire saw cuts... When a jamming fault occurs, the tension wheel 52 stops rotating, the cam 55 stops driving the slag discharge mechanism 6, the airflow inside the ventilation pipe 65 is interrupted, the ventilation pipe 76 no longer supplies airflow to the pressure relief chamber 711, the drive wedge 73 loses the airflow thrust constraint, the unloading spring 74 rebounds and resets, pulling the drive wedge 73 back, the drive wedge 73 releases the push limit on the limit slider 72, at this time the holding spring 75 rebounds and drives the limit slider 72 to slide and reset away from the hydraulic cylinder 54, the pressure relief chamber 711 channel is fully opened, the hydraulic cylinder 54 quickly releases pressure through the pressure relief chamber 711, the thrust of the hydraulic cylinder 54 disappears, the tension slider 53 retracts and relaxes the wire saw cutting rope 2, realizing the emergency unloading protection of the equipment jamming.

[0045] Example 2: This application discloses a method for static cutting and breaking up a connection in a diaphragm wall, including the following steps: Step S1: During the reinforcement cage binding stage of the diaphragm wall, the pre-made guide pipe is embedded and fixed in the reinforcement cage along the design connection edge line. It is then hoisted into the trench along with the reinforcement cage and concrete is poured to form a diaphragm wall with embedded guide channels. Step S2: After the main structure of the underground continuous wall is poured and reaches the curing strength, the end of the elastic traction rope 3 near the guide and obstacle clearing component 4 is sent into the channel of the guide tube. At the entrance of the guide tube, the elastic traction rope 3 is driven to push and pull back and forth. The guide and obstacle clearing component 4 is used to realize the physical path finding of the branch intersections and bends in the channel. At the same time, the guide and obstacle clearing component 4 is used to catch the debris in the guide tube channel and bring it out of the channel, thus completing the full connection and internal cleaning of the guide channel. Step S3: After the guide clearing component 4 and the end of the elastic traction rope 3 have completely passed through the other end of the guide tube, remove the guide clearing component 4 and use the connecting structure at the other end of the elastic traction rope 3 to connect and lock it with the first connecting buckle 21 or the second connecting buckle 22 at the front end of the wire saw cutting rope 2. Step S4: Pull the elastic traction rope 3 at the outlet end of the guide tube to drag the wire saw cutting rope 2 into and completely pass through the channel of the guide tube; after the wire saw cutting rope 2 has completely passed out, disconnect the connection structure, remove the elastic traction rope 3, and connect the first connecting buckle 21 at the head end of the wire saw cutting rope 2 with the second connecting buckle 22 at the tail end to form a closed-loop wire saw structure for driving. Step S5: The closed-loop wire saw structure formed in step S4 is wound around the drive tensioning component 5 at the output end of the wire saw machine 1. The drive tensioning component 5 is adjusted to make the wire saw cutting rope 2 taut along the guide path of the guide tube, so as to achieve the preset working tension required for static cutting. Step S6: Start the wire saw machine 1, so that the closed-loop wire saw cutting rope 2 can grind and cut the diaphragm wall along the limiting path of the guide tube; during the cutting process, if the wire saw cutting rope 2 encounters hard steel bars or slag and gets stuck, causing a sudden increase in tension, drive the tensioning component 5 to release the tension of the wire saw cutting rope 2 and stop it abruptly to avoid the wire saw breaking; after the wall is cut, release the closed-loop structure and retrieve the wire saw machine 1 and the wire saw cutting rope 2.

[0046] The working principle of the static cutting and breaking device and breaking construction method for the connection of a diaphragm wall in this application is as follows: During operation, an external pushing force-applying device pushes the elastic traction rope 3, which drives the guide and obstacle-clearing component 4 to complete the exploration, path finding, turning and obstacle clearing operations in the pre-embedded guide pipe channel. After the elastic traction rope 3 is connected to the first connecting buckle 21 or the second connecting buckle 22 through the connecting sleeve, the rope saw cutting rope 2 is dragged by the pull-back elastic traction rope 3 to complete the rope laying. During the movement of the guide and obstacle-clearing component 4, the obstacle-breaking cone 41 relies on the spiral slag discharge groove 412 to cut and discharge hard objects in the channel. When no branch is encountered, the hinged flexible shaft 421 extends out of the guide sleeve 422 under the action of gravity, relying on the eccentric block 421 1. To achieve deflection and steering, when encountering a branch road that is not needed, the sliding guide sleeve 422 engages and locks the locking buckle 4221 with the locking buckle 411, locking the hinged flexible shaft 421 to maintain a straight posture to pass the branch road. When turning again is needed, the elastic traction rope 3 is shaken, and the elasticity of the collecting spring 44 is used to slide the guide sleeve 422 to unlock, restoring the deflection ability of the hinged flexible shaft 421. During the pull-back operation, the conical collecting spring 44 catches the debris inside the channel and brings it out with the elastic traction rope 3, thus clearing the channel. After the rope is laid out, the wire saw cutting rope 2 is connected to form a closed loop structure. The wire saw machine 1 outputs power to the drive tensioning component 5, and the drive wheel 51 transmits power to drive the wire saw cutting rope 2. In a cyclical motion, hydraulic cylinder 54 pushes tension slider 53 to move, tension wheel 52 adjusts the tension of wire saw cutting rope 2, and the rotation of tension wheel 52 drives cam 55 to rotate synchronously. Cam 55 provides reciprocating drive input to slag discharge mechanism 6. During the operation of slag discharge mechanism 6, cam 55 reciprocates against drive rod 63, and with the help of top spring 64, drives piston 62 to slide back and forth. Under the unidirectional opening and closing of first baffle 67 and second baffle 68, positive airflow is continuously generated. The airflow passes through ventilation pipe 65 to blow away mud and debris at tension wheel 52 to achieve slag discharge, and on the other hand, it blows the drive wedge 73 of unloading component 7 through ventilation pipe 76. The airflow thrust overcomes the elasticity of unloading spring 74 to drive the drive wedge 73. The moving wedge 73 moves forward, pushing the limit slider 72 against the elastic force of the holding spring 75, blocking the communication channel between the pressure relief chamber 711 and the hydraulic cylinder 54. The hydraulic cylinder 54 maintains the pressure holding state to maintain the working tension of the wire saw cutting rope 2. When the wire saw cutting rope 2 jams, the tension wheel 52 and cam 55 stop operating, the slag discharge mechanism 6 stops generating airflow, the driving wedge 73 loses the blowing thrust, the unloading spring 74 drives the driving wedge 73 to retract, releasing the push on the limit slider 72. The holding spring 75 drives the limit slider 72 to reset and open the pressure relief chamber 711. The hydraulic cylinder 54 quickly releases pressure, and the tension slider 53 retracts to release the tension of the wire saw cutting rope 2, completing the emergency unloading protection.For the static cutting and demolition method corresponding to the underground continuous wall connection, a guide pipe is pre-embedded to form a guide channel. After curing, the guide channel is found and cleared of debris by the elastic traction rope 3 and the guide and obstacle clearing component 4. Then, the elastic traction rope 3 drags the wire saw cutting rope 2 to complete the rope threading. After the rope is connected to form a closed loop, it is wound onto the drive tensioning component 5. After adjusting to the preset working tension, the wire saw machine 1 is started to carry out grinding and cutting. When jamming occurs, the device automatically releases the tension for protection. After the cutting is completed, the closed loop structure is disassembled to complete the equipment recovery.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A static cutting and demolition device for connecting openings in underground continuous walls, used in the manufacturing and construction of reinforced concrete precast frames and other concrete structural components, characterized in that: The device includes a wire saw (1), a wire saw cutting rope (2), and an elastic traction rope (3). The wire saw cutting rope (2) has a first connecting buckle (21) and a second connecting buckle (22) at its two ends. The first connecting buckle (21) and the second connecting buckle (22) are used to connect the wire saw cutting rope (2) to form a closed loop structure. The output end of the wire saw (1) is provided with a drive tensioning component (5). The wire saw cutting rope (2) forming the closed loop structure is wound around the drive tensioning component (5). One end of the elastic traction rope (3) is provided with a connecting structure, which is used to connect the first connecting buckle (21) or the second connecting buckle (22) on the wire saw cutting rope (2). The other end of the elastic traction rope (3) is provided with a guide and obstacle clearing component (4).

2. The static cutting and breaking device for the connection opening of a diaphragm wall according to claim 1, characterized in that: The guide and obstacle clearing assembly (4) includes an obstacle-breaking cone (41), a guide mechanism (42), a guide rod (43), and a collecting spring (44). The obstacle-breaking cone (41) is disposed at one end of the guide mechanism (42), and the other end of the guide mechanism (42) is slidably disposed on the guide rod (43). One end of the collecting spring (44) is fixedly disposed at the other end of the guide mechanism (42), and the other end of the collecting spring (44) is fixedly disposed at the other end of the elastic traction rope (3). A snap fastener (411) is provided on the end face of the obstacle-breaking cone (41) near the guide mechanism (42).

3. The static cutting and breaking device for the connection opening of a diaphragm wall according to claim 2, characterized in that: The guiding mechanism (42) includes a hinged flexible shaft (421) and a guide sleeve (422). The hinged flexible shaft (421) is formed by hinged multiple short shafts. One end of the hinged flexible shaft (421) is fixedly connected to the obstacle-breaking cone (41), and the other end of the hinged flexible shaft (421) is fixedly connected to the guide rod (43). The guide sleeve (422) is sleeved on the hinged flexible shaft (421), and one end of the guide sleeve (422) is slidably connected to the guide rod (43). A snap-fit ​​buckle (4221) is provided on the end face of the other end of the guide sleeve (422), and the snap-fit ​​buckle (4221) is used to snap the snap-fit ​​buckle (411). An eccentric block (4211) is provided on a set of short shafts of the hinged flexible shaft (421) near the obstacle-breaking cone (41).

4. The static cutting and breaking device for the connection opening of a diaphragm wall according to claim 2, characterized in that: The surface of the obstacle-breaking cone (41) is provided with a spiral slag discharge groove (412).

5. The static cutting and breaking device for the connection opening of a diaphragm wall according to claim 3, characterized in that: The collecting spring (44) is conical, and the large end of the collecting spring (44) is fixedly connected to the guide sleeve (422), while the small end of the collecting spring (44) is fixedly connected to the other end of the elastic traction rope (3).

6. The static cutting and breaking device for the connection opening of a diaphragm wall according to claim 3, characterized in that: The guide sleeve (422) is rotatably provided with multiple sets of positioning rollers (4222), which abut against the hinged flexible shaft (421), and the guide sleeve (422) is provided with multiple sets of guide rollers (4223) on the outside.

7. The static cutting and breaking device for the connection opening of a diaphragm wall according to claim 1, characterized in that: The drive tensioning assembly (5) includes a drive wheel (51), a tensioning wheel (52), a tensioning slider (53), and a hydraulic cylinder (54). The drive wheel (51) is fixedly mounted on the output end of the wire saw (1). The tensioning slider (53) is slidably mounted on the frame of the wire saw (1). The hydraulic cylinder (54) is fixedly mounted on the frame of the wire saw (1) and is used to push the tensioning slider (53) to slide. The tensioning wheel (52) is rotatably mounted on the tensioning slider (53), and a cam (55) is fixedly mounted on the tensioning wheel (52). A slag discharge mechanism (6) is provided on the tensioning slider (53), and the slag discharge mechanism (6) abuts against the cam (55).

8. The static cutting and breaking device for the connection opening of a diaphragm wall according to claim 7, characterized in that: The slag discharge mechanism (6) includes a slag discharge air box (61), a drive piston (62), a drive rod (63), a top spring (64), and a ventilation pipe (65). The slag discharge air box (61) is fixedly mounted on the tension slider (53). A partition (66) is provided inside the slag discharge air box (61). Air outlets (661) are provided at both ends of the partition (66). The partition (66) divides the interior of the slag discharge air box (61) into a drive chamber (611) and a ventilation chamber (612). The drive piston (62) is slidably mounted in the drive chamber (611). One end of the drive rod (63) is fixedly mounted on the drive piston (62). The other end of the drive rod (63) abuts against the cam (55). The drive rod (63) slides against the slag discharge air box (61). The drive rod (63) is connected to the drive rod (63). One end of the drive rod (64) is fixed on the slag discharge air box (61), and the other end of the drive rod (63) is fixed on the drive rod (63). One end of the ventilation pipe (65) is set on the slag discharge air box (61). The ventilation pipe (65) is connected to the ventilation cavity (612). The other end of the ventilation pipe (65) extends toward the tension wheel (52). A first baffle (67) is rotatably set at the air outlet (661) in the ventilation cavity (612). Both ends of the drive cavity (611) are provided with air inlets (613) for connecting to the outside. A second baffle (68) is rotatably set at the air inlet (613) in the drive cavity (611).

9. A static cutting and breaking device for the connection opening of a diaphragm wall according to claim 8, characterized in that: The hydraulic cylinder (54) is equipped with a force-relieving assembly (7), which includes a pressure relief valve body (71), a limit slider (72), a drive wedge (73), a force-relieving spring (74), a retaining spring (75), and a vent pipe (76). The pressure relief valve body (71) is fixedly mounted on the hydraulic cylinder (54), and the pressure relief valve body (71) is at a right angle. A pressure relief chamber (711) is provided inside the pressure relief valve body (71), and the pressure relief chamber (711) is connected to the hydraulic cylinder (54). The limit slider (72) is slidably mounted at one end of the pressure relief chamber (711), and one end of the retaining spring (75) is fixedly mounted. The retaining spring (75) is fixedly mounted on the limiting slider (72) at one end of the pressure relief chamber (711); the driving wedge (73) is slidably mounted on the other end of the pressure relief chamber (711); one end of the unloading spring (74) is fixedly mounted on the other end of the pressure relief chamber (711), and the other end of the unloading spring (74) is fixedly mounted on the driving wedge (73); the limiting slider (72) abuts against the driving wedge (73); one end of the venting pipe (76) is connected to one end of the ventilation pipe (65), and the other end of the venting pipe (76) is connected to the other end of the pressure relief chamber (711).

10. A method for static cutting and demolition of a diaphragm wall connection opening, characterized in that, Includes the following steps: Step S1: During the reinforcement cage binding stage of the diaphragm wall, the pre-made guide pipe is embedded and fixed in the reinforcement cage along the design connection edge line. It is then hoisted into the trench along with the reinforcement cage and concrete is poured to form a diaphragm wall with embedded guide channels. Step S2: After the main structure of the underground continuous wall is poured and reaches the curing strength, the end of the elastic traction rope (3) close to the guide and clearing component (4) is sent into the channel of the guide tube. At the entrance of the guide tube, the elastic traction rope (3) is driven to push and pull back and forth. The guide and clearing component (4) is used to realize the physical path finding of the branch intersections and bends in the channel. At the same time, the guide and clearing component (4) is used to catch the debris in the guide tube channel and bring it out of the channel, thus completing the full connection and internal cleaning of the guide channel. Step S3: After the guide clearing component (4) and the end of the elastic traction rope (3) have completely passed through the other end of the guide tube, remove the guide clearing component (4) and use the connecting structure of the other end of the elastic traction rope (3) to connect and lock it with the first connecting buckle (21) or the second connecting buckle (22) at the front end of the wire saw cutting rope (2). Step S4: Pull the elastic traction rope (3) at the outlet end of the guide tube to drag the wire saw cutting rope (2) into and completely pass through the channel of the guide tube; after the wire saw cutting rope (2) has completely passed out, disconnect the connection of the connection structure, remove the elastic traction rope (3), and connect the first connecting buckle (21) at the head end of the wire saw cutting rope (2) with the second connecting buckle (22) at the tail end to form a closed-loop wire saw structure for driving. Step S5: The closed-loop wire saw structure formed in step S4 is wound around the drive tensioning assembly (5) at the output end of the wire saw machine (1). The drive tensioning assembly (5) is adjusted to make the wire saw cutting rope (2) taut along the guide path of the guide tube to achieve the preset working tension required for static cutting. Step S6: Start the wire saw (1) and make the closed-loop wire saw cutting rope (2) grind and cut the underground continuous wall along the limit path of the guide tube; during the cutting process, if the wire saw cutting rope (2) gets stuck in hard steel bars or slag, causing a sudden increase in tension, drive the tensioning component (5) to release the tension of the wire saw cutting rope (2) and stop it abruptly to avoid the wire saw breaking; after the wall is cut, release the closed-loop structure and retrieve the wire saw (1) and the wire saw cutting rope (2).

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