Grooving guide device and method for second-stage groove of joint hole of ultra-deep diaphragm wall

Abstract

The invention relates to the technical field of mine ultra-deep diaphragm wall construction, in particular to an ultra-deep diaphragm wall connector hole second-stage groove forming guide device and method.The ultra-deep diaphragm wall connector hole second-stage groove forming guide device comprises a double-wheel groove milling machine, an upper guide assembly and a lower guide assembly are arranged on one side of the double-wheel groove milling machine, and a connecting shell is arranged at the lower end of the lower guide assembly; an in-hole guide assembly is arranged at the lower end of the connecting shell and comprises an embedded shell and a fixing block, a crushing assembly is arranged on one side of the embedded shell in a penetrating mode, a communicating assembly is arranged on the crushing assembly in an up-down penetrating mode, a third electric telescopic rod is fixedly connected to the lower end of the fixing block in an embedded mode, and an extrusion plate is fixedly connected to the lower end of the third electric telescopic rod; a supporting net plate and an embedded assembly are fixedly arranged on the inner wall of the embedded shell. Through the arrangement of the upper guide assembly, the lower guide assembly and the in-hole guide assembly, the anti-deviation guide function during groove milling is achieved, soil blocks in a connector hole can be crushed while groove milling is conducted, and blocking prevention and automatic dredging of the deslagging branch pipe are achieved.

Description

Technical Field

[0001] This invention relates to the field of construction technology for ultra-deep seepage prevention walls in mines, and in particular to a guiding device and method for the second-stage trenching of joint holes in ultra-deep seepage prevention walls. Background Technology

[0002] Mining operations can damage groundwater systems, especially in open-pit or underground mines, easily leading to problems such as leakage, pollution, or slope instability. Ultra-deep cutoff walls are a vertical barrier technology that forms a barrier by penetrating deep into impermeable layers to block groundwater flow, prevent the spread of pollutants, and reinforce the foundation. In mines, ultra-deep cutoff walls can be applied to tailings dam seepage prevention, groundwater isolation around mining pits, or slope stabilization in open-pit mines to reduce the negative ecological impact of mining. When constructing secondary trenches using the cutoff wall joint pipe method, since one side is a joint hole and the other side is the original stratum, the trenching process is prone to deviation due to the inconsistent strength on both sides of the trench section. Therefore, a guiding device is required.

[0003] For example, Chinese Patent No. CN113513261B discloses a drill rod guiding device for assisting an impact rotary rock drill in completing trenching operations. It relates to the field of geotechnical engineering machinery and includes a guide positioning tube that can be inserted into a pre-formed borehole, a drill rod limiting sleeve that is sleeved on the drill rod of the rock drill and restricts the radial swing of the drill rod, and two or more metal connecting blocks that connect the guide positioning tube and the drill rod limiting sleeve.

[0004] The aforementioned device achieves its guiding function by installing a drill rod guide device on the drill rod and impactor, thereby reducing the lateral oscillation of the drill bit and drill rod. However, in actual use, due to the continuous supply of mud and water to the milling trench during the construction of ultra-deep cut-off walls, the excavated debris is discharged through the slurry discharge pipe. The guide device typically uses a thinner branch pipe for slurry discharge. When ultra-deep cut-off wall construction encounters cohesive soil, the cohesive soil is more likely to clump together and block the branch pipe. The existing device has poor anti-clogging effect on the branch pipe during use, requiring frequent cleaning and reducing construction efficiency. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that the existing technology has poor anti-clogging effect on branch pipes, requires frequent cleaning, and reduces construction efficiency. Therefore, this invention proposes a trenching guide device and method for the second-stage trenching of ultra-deep anti-seepage wall joint holes.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a trenching guide device for the second-stage trench of an ultra-deep anti-seepage wall joint hole, including a double-wheel trenching machine, an upper guide component and a lower guide component are spaced apart on one side of the double-wheel trenching machine, and the lower guide component is located below the upper guide component. A connecting shell is provided at the lower end of the lower guide component, and an in-hole guide component is provided at the lower end of the connecting shell.

[0007] The in-hole guide assembly includes an embedded housing fixedly connected to the lower end of the connecting housing and a fixing block fixedly connected to the inner wall of the embedded housing. A crushing component is provided through one side of the embedded housing, and a connecting component is provided through the upper and lower parts of the crushing component. Two sets of connecting components are provided at intervals. A third electric telescopic rod is embedded and fixedly connected to the lower end of the fixing block. A pressing plate is fixedly connected to the lower end of the third electric telescopic rod. A support mesh plate and an embedded assembly are fixedly provided on the inner wall of the embedded housing, and the support mesh plate is located above the embedded assembly.

[0008] Preferably, the lower guide assembly includes a fixed housing that is threadedly connected to one side of the twin-wheel grooving machine by bolts, and the fixed housing, connecting housing, and embedded housing are sequentially connected inside. The diameters of the fixed housing, connecting housing, and embedded housing are all smaller than the joint hole by centimeters. Multiple sets of through holes are opened on the outer surface of the lower guide assembly. An air inlet pipe and a slurry discharge branch pipe are provided through the upper end of the fixed housing at intervals. The lower end of the air inlet pipe extends into the inner side of the embedded housing. One end of the slurry discharge branch pipe is connected to the slurry discharge main pipe inside the twin-wheel grooving machine. A magnetic ring is fixedly installed at the other end of the slurry discharge branch pipe. A flow valve is fixedly installed on the slurry discharge branch pipe. A backflushing pipe and a feed pipe are provided through the outer surface of the slurry discharge branch pipe, and two sets of feed pipes are provided at intervals. Both sets of feed pipes are located inside the fixed housing. Valves are installed on both sets of feed pipes. The flow valve is located above the connection position between the backflushing pipe and the slurry discharge branch pipe. One end of the backflushing pipe is connected to an external water pump.

[0009] Preferably, the crushing component includes a first electric telescopic rod that is embedded and fixedly connected to the upper end of the fixed block. A connecting frame is fixedly connected to the upper end of the first electric telescopic rod. An arc-shaped brush strip is fixedly connected to one side of the connecting frame. An movable groove is provided on the side of the embedded housing for the connecting frame to move. The outer surface of the arc-shaped brush strip contacts the inner wall of the connector hole.

[0010] Preferably, a protective housing is fixedly connected to the lower middle part of the connecting frame, a motor is fixedly connected inside the protective housing, the output end of the motor passes through the protective housing and is fixedly connected to a filter screen plate, the center of the filter screen plate is set as a solid disc, the lower surface of the protective housing contacts the center of the filter screen plate, a sliding ring is slidably connected to the inner wall of the housing, and the outer surface of the filter screen plate is rotatably connected to the inner side of the sliding ring.

[0011] Preferably, the connecting component includes a fixed ring that is fixedly connected through the filter screen and an embedded ring that is movably disposed at the upper end of the fixed ring. The lower end of the embedded ring is fixedly connected to an anti-detachment ring that is movably engaged with the fixed ring. The upper end of the embedded ring is fixedly connected to a magnetic ring, and the magnetic ring is magnetically connected to the lower end of the slurry discharge branch pipe.

[0012] Preferably, a spring telescopic rod and a blocking block are fixedly connected inside the fixed ring, and multiple sets of spring telescopic rods and blocking blocks are arranged alternately. The lower ends of the multiple sets of spring telescopic rods are fixedly connected to blocking discs, and the outer surface of the blocking discs is in contact with the inner wall of the fixed ring.

[0013] Preferably, the extrusion plate has a clearance groove on its lower surface that matches the mesh of the filter screen, and the extrusion plate is positioned above the filter screen. The mesh of the support screen coincides with the mesh of the filter screen, and the support screen is positioned below the filter screen. The embedded component includes a second electric telescopic rod fixedly connected to the inner wall of the embedded housing and a transmission connecting plate fixedly connected to the upper end of the second electric telescopic rod. The second electric telescopic rod and the transmission connecting plate are each provided in two sets at intervals. Multiple sets of fixing plates are fixedly connected to the upper ends of the two sets of transmission connecting plates. Top rods are fixedly connected to the upper ends of the multiple sets of fixing plates, and multiple sets of top rods are provided. The multiple sets of top rods are evenly arranged below the mesh of the support screen. The support screen and the extrusion plate both have clearance holes with the same outer diameter as the fixing ring. The multiple sets of fixing plates located below the fixing ring are disconnected in the middle.

[0014] Preferably, the upper guide assembly is slidably connected to one side of the twin-wheel grooving machine with a T-shaped connecting plate. One side of the T-shaped connecting plate is connected to a sliding housing by bolts and threads. The other side of the T-shaped connecting plate is provided with a clamping part, which includes a driving part and a clamping plate. The clamping plate of the clamping part is embedded and movably connected to one side of the twin-wheel grooving machine.

[0015] Preferably, an installation block is fixedly connected to the upper end of the sliding housing, and a fourth electric telescopic rod is fixedly connected to both sides of the installation block. A limit strip is fixedly connected to one end of each of the two sets of fourth electric telescopic rods, and the two sets of limit strips are respectively movably connected to both sides of the sliding housing.

[0016] A method for guiding the second-stage trenching of ultra-deep cut-off wall joint holes, comprising the aforementioned guiding device for the second-stage trenching of ultra-deep cut-off wall joint holes, and further comprising the following steps:

[0017] S1: Move the embedded housing above the connector hole so that the twin-wheel grooving machine moves downward;

[0018] S2: Embed the housing into the joint hole, and mill the groove downwards using a double wheel milling machine. Continuously inject mud and water into the lower end of the double wheel milling machine, and at the same time inject gas through the air inlet pipe.

[0019] S3: The filter screen and support screen continuously cut large particles of slag, while the extrusion plate and top rod intermittently crush the hard slag stuck on the filter screen. At the same time, the mud and slag are discharged through the slurry branch pipe and the slag discharge main pipe.

[0020] S4: As the twin-wheel trenching machine advances through the trench, the connecting shell, the fixed shell, and the sliding shell will enter the joint hole. Then, the sliding shell will be fixed on one side of the twin-wheel trenching machine near the upper end. Through the guidance of the sliding shell, the fixed shell, the connecting shell, and the embedded shell, the trenching direction of the twin-wheel trenching machine can be fixed.

[0021] S5: After the milling is completed, move the dual-wheel milling machine and the embedded housing upwards out of the second-stage groove and clean the second-stage groove section.

[0022] Compared with existing technologies, the advantages of this invention are:

[0023] 1. This invention limits the sliding shell, fixed shell, connecting shell, and embedded shell through the joint hole, which can fix the excavation direction of the twin-wheel trenching machine and prevent the trench hole from deviating during the trenching process, thereby achieving the guiding function. Through the movable setting of the sliding shell, in the initial soil entry stage, the upper guide structure is close to the lower guide structure to form a short-distance double-point support, which can enhance the positioning stability of the twin-wheel trenching machine during the initial soil entry and prevent the twin-wheel trenching machine from deviating. In the excavation stage, the upper guide structure slides to the upper end of the trenching machine and is fixed to form a long-distance guide, which can ensure the verticality of the deep trench section and effectively improve the guiding effect of the device.

[0024] 2. This invention cleans the inner wall of the joint hole with an arc-shaped brush strip, reducing the pressure of subsequent cleaning. At the same time, it screens and crushes large particles of slag through a filter screen plate, and combines the intermittent crushing of hard slag with the extrusion plate and top rod, which can promote the discharge of soil clods, reduce the deposition of slag in the joint hole, and ensure smooth slag discharge.

[0025] 3. By setting up the lower guide component and the in-hole guide component, the present invention realizes the backflushing of the slurry discharge branch pipe and the automatic unblocking when blocked. The blocked soil can be cut and discharged without stopping the machine for cleaning, which can improve construction efficiency, significantly reduce the risk of deviation and the probability of blockage, and is suitable for continuous construction of ultra-deep anti-seepage walls in complex strata. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the trenching guide device and method for the second-stage trenching of the ultra-deep seepage barrier wall joint hole proposed in this invention. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the overall structure of the trenching guide device and method for the second-stage trenching of the ultra-deep seepage barrier wall joint hole proposed in this invention. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of the lower guide assembly, connecting shell, and in-hole guide assembly structure of a trenching guide device and method for the second-stage trenching of an ultra-deep seepage barrier wall joint hole proposed in this invention.

[0029] Figure 4 This is a cross-sectional view of the lower guide assembly, connecting shell, and in-hole guide assembly structure of a trenching guide device and method for the second-stage trenching of an ultra-deep seepage barrier wall joint hole proposed in this invention.

[0030] Figure 5This is a schematic diagram of the in-hole guiding component structure of a trenching guiding device and method for the second-stage trenching of an ultra-deep seepage-proof wall joint hole proposed in this invention.

[0031] Figure 6 This is a schematic diagram of the crushing component structure of a trenching guide device and method for the second-stage trenching of an ultra-deep seepage barrier wall joint hole proposed in this invention.

[0032] Figure 7 This is a schematic diagram showing the disassembled structure of the filter screen plate and sliding ring of the trenching guide device and method for the second-stage trenching of the ultra-deep anti-seepage wall joint hole proposed in this invention.

[0033] Figure 8 This is a schematic diagram showing the disassembled structure of the connecting components of the trenching guide device and method for the second-stage trenching of the ultra-deep seepage barrier wall joint hole proposed in this invention.

[0034] Figure 9 This is a schematic plan view of the filter screen plate, extrusion plate, embedded component and support screen plate structure of the trenching guide device and method for the second-stage trenching of the joint hole of the ultra-deep seepage barrier wall proposed in this invention.

[0035] Figure 10 This is a schematic diagram of the supporting mesh structure of a trenching guide device and method for the second-stage trenching of an ultra-deep seepage-proof wall joint hole proposed in this invention.

[0036] Figure 11 This is a schematic diagram showing the disassembled structure of the embedded component of the trenching guide device and method for the second-stage trenching of the ultra-deep seepage barrier wall joint hole proposed in this invention.

[0037] Figure 12 This is a schematic diagram of the upper guide component structure of a trenching guide device and method for the second-stage trenching of an ultra-deep seepage-proof wall joint hole proposed in this invention.

[0038] Figure 13 This is a structural breakdown diagram of the limiting strip, mounting block, and fourth electric telescopic rod of the trenching guide device and method for the second-stage trenching of the ultra-deep anti-seepage wall joint hole proposed in this invention.

[0039] In the diagram: 1. Twin-wheel grooving machine; 2. Upper guide assembly; 21. Sliding housing; 22. T-shaped connecting plate; 23. Clamping part; 24. Limiting strip; 25. Mounting block; 26. Fourth electric telescopic rod; 3. Lower guide assembly; 31. Fixed housing; 32. Air inlet pipe; 33. Slurry discharge branch pipe; 34. Backflush pipe; 35. Flow valve; 36. Feed pipe; 4. Connecting housing; 5. In-hole guide assembly; 51. Embedded housing; 52. Fixed block; 53. Crushing assembly; 531. First electric telescopic rod; 532. 533. Connecting frame; 534. Arc-shaped brush strip; 535. Protective housing; 536. Filter screen; 537. Sliding ring; 538. Motor; 54. Extrusion plate; 55. Embedded assembly; 551. Second electric telescopic rod; 552. Transmission connecting plate; 553. Fixing plate; 554. Top rod; 56. Connecting assembly; 561. Fixing ring; 562. Magnetic ring; 563. Embedded ring; 564. Spring telescopic rod; 565. Blocking block; 566. Blocking disc; 57. Supporting screen; 58. Third electric telescopic rod. Detailed Implementation

[0040] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0041] Example

[0042] Reference Figures 1-13 A trenching guide device for the second-stage trenching of an ultra-deep seepage-proof wall joint hole includes a twin-wheel trenching machine 1. An upper guide component 2 and a lower guide component 3 are spaced apart on one side of the twin-wheel trenching machine 1, with the lower guide component 3 positioned below the upper guide component 2. A connecting housing 4 is provided at the lower end of the lower guide component 3, and an in-hole guide component 5 is provided at the lower end of the connecting housing 4. The in-hole guide component 5 is used to embed inside the joint hole to guide the connecting housing 4 and the lower guide component 3. The upper guide component 2 and the lower guide component 3 are used to guide the twin-wheel trenching machine 1. The connecting housing 4 is used to connect the lower guide component 3 and the in-hole guide component 5. During normal milling, the upper guide component 2, the lower guide component 3, the connecting housing 4, and the in-hole guide component 5 are all located inside the joint hole, which can fix the twin-wheel trenching machine 1 and prevent the trench hole from deflecting during the trenching process.

[0043] The in-hole guide assembly 5 includes an embedded housing 51 fixedly connected to the lower end of the connecting housing 4 and a fixing block 52 fixedly connected to the inner wall of the embedded housing 51. A crushing assembly 53 is provided through one side of the embedded housing 51. A connecting assembly 56 is provided through the upper and lower parts of the crushing assembly 53, and two sets of connecting assemblies 56 are provided at intervals. A third electric telescopic rod 58 is embedded and fixedly connected to the lower end of the fixing block 52. A pressing plate 54 is fixedly connected to the lower end of the third electric telescopic rod 58. A support mesh plate 57 and an embedded assembly 55 are fixedly provided on the inner wall of the embedded housing 51, and the support mesh plate 57 is located above the embedded assembly 55. The embedded housing 51 is used for guiding the insertion into the joint hole. The fixing block 52 is used to install the crushing assembly 53 and the third electric telescopic rod 58. The crushing assembly 53 is used to clean the inner wall of the joint hole and prevent large soil clods from floating in the joint hole. The pressing plate 54 and the embedded assembly 55 are used to crush hard soil clods. The connecting assembly 56 is used to allow soil clods to move in one direction. The support mesh plate 57 is used to assist the crushing assembly 53 in crushing soil clods. The third electric telescopic rod 58 is used to drive the pressing plate 54 to rise and fall.

[0044] The lower guide assembly 3 includes a fixed housing 31 that is threadedly connected to one side of the twin-wheel grooving machine 1 by bolts. The fixed housing 31, the connecting housing 4, and the embedded housing 51 are sequentially connected internally. The diameters of the fixed housing 31, the connecting housing 4, and the embedded housing 51 are all 5 cm smaller than the joint hole. Multiple sets of through holes are opened on the outer surface of the lower guide assembly 3. An air inlet pipe 32 and a slurry discharge branch pipe 33 are provided through the upper end of the fixed housing 31 at intervals. The lower end of the air inlet pipe 32 extends into the inner side of the embedded housing 51. One end of the slurry discharge branch pipe 33 is connected to the main slurry discharge pipe inside the twin-wheel grooving machine 1. A magnetic ring is fixedly installed on the other end of the slurry discharge branch pipe 33. A flow valve 35 is fixedly installed on the slurry discharge branch pipe 33. A backflushing pipe 34 and a feed pipe 36 are provided through the outer surface of the slurry discharge branch pipe 33 at intervals. Two sets of feed pipes 36 are provided, both of which are located inside the fixed housing 31. Valves are installed on both sets of feed pipes 36. Flow valves 35 are located above the connection between the backflushing pipe 34 and the slurry discharge branch pipe 33. One end of the backflushing pipe 34 is connected to an external water pump. Controlling whether the slurry discharge branch pipe 33 is connected to the slurry discharge main pipe support and detecting the flow rate of the mud and water inside the slurry discharge branch pipe 33 are known prior art. Those skilled in the art can conceive of the specific structure. When the flow rate inside the slurry discharge branch pipe 33 decreases to a threshold value, it indicates that the slurry discharge branch pipe 33 is blocked. External mud and water can be backflushed into the slurry discharge branch pipe 33 through the backflushing pipe 34. The high-pressure water flow can flush out the slag and soil blocking the slurry discharge branch pipe 33, thus clearing the blockage.

[0045] The crushing component 53 includes a first electric telescopic rod 531 that is embedded and fixedly connected to the upper end of the fixed block 52. A connecting frame 532 is fixedly connected to the upper end of the first electric telescopic rod 531. An arc-shaped brush strip 533 is fixedly connected to one side of the connecting frame 532. An movable groove is provided on one side of the embedded housing 51, which allows the connecting frame 532 to move. The outer surface of the arc-shaped brush strip 533 contacts the inner wall of the joint hole. The first electric telescopic rod 531 can drive the connecting frame 532 and the arc-shaped brush strip 533 to move up and down. The arc-shaped brush strip 533 can brush back and forth on the inner wall of the joint hole, which can brush off the clay and debris adhering to the inner wall of the joint hole.

[0046] A protective housing 534 is fixedly connected to the lower middle part of the connecting frame 532. A motor 537 is fixedly connected inside the protective housing 534. The output end of the motor 537 passes through the protective housing 534 and is fixedly connected to a filter screen 535. The center of the filter screen 535 is set as a solid disc. The lower surface of the protective housing 534 contacts the center of the filter screen 535. A sliding ring 536 is slidably connected to the inner wall of the housing 51. The outer surface of the filter screen 535 is rotatably connected to the inner side of the sliding ring 536. When the connecting frame 532 moves up and down, it will drive the protective housing 534, the motor 537 and the filter screen 535 to move up and down continuously.

[0047] The connecting component 56 includes a fixed ring 561 that is fixedly connected to the filter screen 535 and an embedded ring 563 that is movably disposed on the upper end of the fixed ring 561. The lower end of the embedded ring 563 is fixedly connected to an anti-detachment ring that is movably engaged with the fixed ring 561. The upper end of the embedded ring 563 is fixedly connected to a magnetic ring 562, and the magnetic ring 562 is magnetically connected to the lower end of the slurry discharge branch pipe 33. When the fixed ring 561 moves to the lower end of the slurry discharge branch pipe 33, the magnetic ring 562 will be magnetically connected to the lower end of the slurry discharge branch pipe 33, which can improve the contact tightness between the magnetic ring 562 and the slurry discharge branch pipe 33.

[0048] The fixed ring 561 is internally connected to a spring telescopic rod 564 and a blocking block 565, and multiple sets of spring telescopic rods 564 and blocking blocks 565 are arranged alternately. The lower ends of the multiple sets of spring telescopic rods 564 are fixedly connected to a blocking disc 566, and the outer surface of the blocking disc 566 is in contact with the inner wall of the fixed ring 561. Under the action of buoyancy and the tension of the spring telescopic rods 564, the blocking disc 566 will keep in contact with the blocking block 565, preventing the slag below the filter screen 535 from entering the interior of the fixed ring 561.

[0049] The extrusion plate 54 has a clearance groove on its lower surface that matches the mesh of the filter screen plate 535. The extrusion plate 54 is positioned above the filter screen plate 535. The mesh of the support screen plate 57 overlaps with the mesh of the filter screen plate 535. The support screen plate 57 is positioned below the filter screen plate 535. The embedded component 55 includes a second electric telescopic rod 551 fixedly connected to the inner wall of the embedded housing 51 and a transmission connecting plate 552 fixedly connected to the upper end of the second electric telescopic rod 551. The second electric telescopic rod 551 and the transmission connecting plate 552 are each provided in two sets at intervals. Multiple sets of fixing plates 553 are fixedly connected to the upper ends of the two sets of transmission connecting plates 552. Top rods 554 are fixedly connected to the upper ends of the multiple sets of fixing plates 553. Furthermore, multiple sets of top rods 554 are provided, and these sets of top rods 554 are evenly arranged below the mesh holes of the support mesh plate 57. Both the support mesh plate 57 and the extrusion plate 54 have clearance holes with the same outer diameter as the fixing ring 561. The multiple sets of fixing plates 553 located below the fixing ring 561 are disconnected in the middle. The extrusion plate 54 can be controlled to engage with the filter mesh plate 535 by the third electric telescopic rod 58. When the filter mesh plate 535 moves up and down, it will continuously contact the support mesh plate 57, which can separate the soil clods between the filter mesh plate 535 and the support mesh plate 57. The transmission connecting plate 552, the fixing plate 553 and the top rod 554 can be controlled to move vertically synchronously by the second electric telescopic rod 551.

[0050] The upper guide assembly 2 is slidably connected to one side of the twin-wheel grooving machine 1 by a T-shaped connecting plate 22. One side of the T-shaped connecting plate 22 is connected to a sliding housing 21 by bolts and threads. The other side of the T-shaped connecting plate 22 is provided with a clamping part 23, which includes a driving part and a clamping plate. The clamping plate of the clamping part 23 is embedded and movably connected to one side of the twin-wheel grooving machine 1. The clamping part 23 can clamp one side of the twin-wheel grooving machine 1, thereby fixing the position of the T-shaped connecting plate 22 and the sliding housing 21.

[0051] An installation block 25 is fixedly connected to the upper end of the sliding housing 21. A fourth electric telescopic rod 26 is fixedly connected to both sides of the installation block 25. A limit strip 24 is fixedly connected to one end of each of the two sets of fourth electric telescopic rods 26. The two sets of limit strips 24 are respectively connected to the two sides of the sliding housing 21 through a through-hole. The two sets of fourth electric telescopic rods 26 can control the lateral movement of the two sets of limit strips 24. When the two sets of limit strips 24 come into contact with the concrete on both sides of the joint hole, they can prevent the sliding housing 21 from moving downward, so that the sliding housing 21 slides on one side of the double wheel milling machine 1.

[0052] In this invention, during the second-stage milling of ultra-deep anti-seepage walls in mine construction, two sets of fourth electric telescopic rods 26 extend both sets of limiting strips 24 outwards from the sliding housing 21. Then, the embedded housing 51 is inserted into the joint hole, and the double-wheel milling machine 1 mills the groove. As the double-wheel milling machine 1 advances, the sliding housing 21 enters the joint hole. The joint hole limits the sliding housing 21, the fixed housing 31, the connecting housing 4, and the embedded housing 51, thus fixing the excavation direction of the double-wheel milling machine 1 and preventing the groove from deviating during milling, thereby achieving a guiding function. Blocked by the limiting strips 24, the sliding housing 21 slides on one side of the double-wheel milling machine 1 until the double-wheel milling machine 1... After the excavation reaches a certain depth, the sliding shell 21 approaches the upper end of the twin-wheel trenching machine 1. At this time, the clamping part 23 clamps one side of the twin-wheel trenching machine 1, and at the same time, the two sets of limiting strips 24 move closer to each other, so that the sliding shell 21 is fixed on one side of the twin-wheel trenching machine 1 near the upper end and moves together with the twin-wheel trenching machine 1. Through the movable setting of the sliding shell 21, in the initial soil entry stage, the upper guide structure approaches the lower guide structure to form a short-distance double-point support, which can enhance the positioning stability of the twin-wheel trenching machine 1 during the initial soil entry and prevent the twin-wheel trenching machine 1 from deflecting. In the excavation stage, the upper guide structure slides to the upper end of the trenching machine and is fixed to form a long-distance guide, which can ensure the verticality of the deep trench section and effectively improve the guiding effect of the device.

[0053] During the trench excavation process, slurry will fill the fixed shell 31, connecting shell 4, embedded shell 51, and joint holes. Excavated soil will move along with the slurry. The negative pressure suction of the main slag discharge pipe and slurry branch pipe 33 can quickly discharge the excavated soil and slurry. Air can be injected through the air intake pipe 32 to promote the floating and discharge of the excavated soil. During this process, the first electric telescopic rod 531 enables the arc-shaped brush strip 533 to quickly brush the inner wall of the joint hole, removing the sticky excavated soil and debris adhering to the inner wall of the joint hole, reducing the pressure of subsequent cleaning. The excavated soil can be discharged along with the mud and water. The connecting frame 532 can drive the filter screen plate 535 to move up and down repeatedly. Small particles of soil in the joint holes below the filter screen plate 535 can pass through the filter screen plate 535 and be discharged along with the mud and water, which can reduce the possibility of large soil particles clogging the slurry discharge branch pipe 33. The filter screen plate 535 will contact the support screen plate 57 after moving down a certain distance, which can break up the large soil particles blocked between the filter screen plate 535 and the support screen plate 57, promote the discharge of soil particles, reduce the accumulation of soil in the joint holes, and filter. After the screen plate 535 moves upward a certain distance, it will engage with the lower end of the extrusion plate 54. The extrusion plate 54 can push down the soil adhering to the side wall of the screen plate 535, preventing the screen plate 535 from being blocked and affecting the flow of mud and soil. After a period of use, the motor 537 rotates the screen plate 535 180 degrees, which can replace the left and right sides of the screen plate 535, preventing the mesh of the screen plate 535 connected to the lower part of the housing 4 from being blocked and affecting the flow of mud and soil. During the cutting process of the screen plate 535, at regular intervals... The filter screen 535 is fitted with the extrusion plate 54, and the top rod 554 is inserted through the second electric telescopic rod 551 and placed through the support screen 57. Then, the filter screen 535 and the extrusion plate 54 move downward together through the first electric telescopic rod 531 and the third electric telescopic rod 58, so that the top rod 554 can be embedded in the mesh of the filter screen 535. Through the extrusion of the extrusion plate 54 and the drilling of the top rod 554, the harder slag blocks stuck in the mesh of the filter screen 535 can be broken, which can further improve the anti-clogging effect of the filter screen 535.

[0054] When the flow valve 35 detects that the flow rate inside the slurry discharge branch pipe 33 is lower than the threshold, it indicates that the slurry discharge branch pipe 33 is blocked. The upper end of the slurry discharge branch pipe 33 and the two sets of feed pipes 36 are sealed by the flow valve 35 and the valve. Then, high-pressure mud water is injected into the slurry discharge branch pipe 33 through the backflushing pipe 34 to backflush the slag. Under the water pressure, the baffle plate 566 will move downward, and the large pieces of slag that are blocked will pass through the fixed ring 561. Then the backflushing stops, so that the slurry discharge branch pipe 33 and the two sets of feed pipes 36 can resume flow. Under the elastic force and buoyancy of the spring telescopic rod 564, the baffle plate 566 will close the lower end of the fixed ring 561 again. Then, through the continuous cutting of the filter screen plate 535 and the intermittent crushing of the top rod 554, the large pieces of slag can be crushed. The slag discharge branch pipe 33 can be automatically cleared and prevented from clogging without stopping the machine for cleaning, which can improve the milling efficiency of ultra-deep anti-seepage walls. This invention can not only prevent deviation and guide the slag discharge during the milling process, but also effectively improve the guiding effect through the movable sliding shell 21. The arc-shaped brush strip 533 cleans the inner wall of the joint hole and the filter screen 535 screens and crushes large particles of slag. Combined with the extrusion plate 54 and the top rod 554 to crush hard slag, it can ensure smooth slag discharge. At the same time, the backflushing of the slag discharge branch pipe 33 can automatically clear blockages in the slag discharge branch pipe 33 without stopping the machine for cleaning, which can improve construction efficiency, significantly reduce the risk of deviation and the probability of blockage, and is suitable for continuous construction of ultra-deep anti-seepage walls in complex strata.

[0055] A method for guiding the second-stage trenching of ultra-deep cut-off wall joint holes, comprising the aforementioned guiding device for the second-stage trenching of ultra-deep cut-off wall joint holes, and further comprising the following steps:

[0056] Step 1: Move the embedded housing 51 above the connector hole, so that the dual-wheel milling machine 1 moves downward;

[0057] Step 2: Embed the housing 51 into the joint hole, and mill the groove downwards using the double wheel milling machine 1. Continuously inject mud and water into the lower end of the double wheel milling machine 1, and at the same time inject gas through the air inlet pipe 32.

[0058] Step 3: The filter screen 535 and the support screen 57 continuously cut large particles of slag, while the extrusion plate 54 and the top rod 554 intermittently crush the hard slag stuck on the filter screen 535. At the same time, the mud and slag are discharged through the slurry branch pipe 33 and the slag discharge main pipe.

[0059] Step 4: As the twin-wheel trenching machine 1 advances through the trench, the connecting housing 4, the fixed housing 31, and the sliding housing 21 will enter the joint hole. Then, the sliding housing 21 will be fixed on one side of the twin-wheel trenching machine 1 near the upper end. Through the guidance of the sliding housing 21, the fixed housing 31, the connecting housing 4, and the embedded housing 51, the trenching direction of the twin-wheel trenching machine 1 can be fixed.

[0060] Step 5: After the milling is completed, move the double-wheel milling machine 1 and the embedded housing 51 upward out of the second-stage groove and clean the second-stage groove section.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 trenching guide device for the second-stage trenching of an ultra-deep seepage-proof wall joint hole, comprising a double-wheel trenching machine (1), characterized in that, The double wheel milling machine (1) is provided with an upper guide assembly (2) and a lower guide assembly (3) on one side at intervals, and the lower guide assembly (3) is located below the upper guide assembly (2). A connecting housing (4) is provided at the lower end of the lower guide assembly (3), and an in-hole guide assembly (5) is provided at the lower end of the connecting housing (4). The in-hole guide assembly (5) includes an embedded housing (51) fixedly connected to the lower end of the connecting housing (4) and a fixing block (52) fixedly connected to the inner wall of the embedded housing (51). A crushing assembly (53) is provided through one side of the embedded housing (51). A connecting assembly (56) is provided through the upper and lower ends of the crushing assembly (53), and two sets of connecting assemblies (56) are provided at intervals. A third electric telescopic rod (58) is embedded and fixedly connected to the lower end of the fixing block (52). A pressing plate (54) is fixedly connected to the lower end of the third electric telescopic rod (58). A support mesh plate (57) and an embedded assembly (55) are fixedly provided on the inner wall of the embedded housing (51), and the support mesh plate (57) is located above the embedded assembly (55).

2. The trenching guide device for the second-stage trenching of the ultra-deep seepage-proof wall joint hole according to claim 1, characterized in that, The lower guide assembly (3) includes a fixed housing (31) that is threadedly connected to one side of the twin-wheel milling machine (1) by bolts. The fixed housing (31), the connecting housing (4), and the embedded housing (51) are connected in sequence. The diameters of the fixed housing (31), the connecting housing (4), and the embedded housing (51) are all 5 cm smaller than the joint hole. The outer surface of the lower guide assembly (3) has multiple sets of through holes. An air inlet pipe (32) and a slurry discharge branch pipe (33) are provided at intervals through the upper end of the fixed housing (31). The lower end of the air inlet pipe (32) extends into the inner side of the embedded housing (51). One end of the slurry discharge branch pipe (33) is connected to the twin-wheel milling machine (1). The internal slurry discharge main pipe of the wheel milling machine (1) is connected, and a magnetic ring is fixedly installed at the other end of the slurry discharge branch pipe (33). A flow valve (35) is fixedly installed on the slurry discharge branch pipe (33). A backflushing pipe (34) and a feed pipe (36) are installed through the outer surface of the slurry discharge branch pipe (33). Two sets of feed pipes (36) are arranged at intervals. Both sets of feed pipes (36) are set inside the fixed housing (31). A valve is installed on both sets of feed pipes (36). The flow valve (35) is set above the connection position between the backflushing pipe (34) and the slurry discharge branch pipe (33). One end of the backflushing pipe (34) is connected to an external water pump.

3. The trenching guide device for the second-stage trenching of the ultra-deep seepage-proof wall joint hole according to claim 1, characterized in that, The crushing component (53) includes a first electric telescopic rod (531) that is embedded and fixedly connected to the upper end of the fixed block (52). A connecting frame (532) is fixedly connected to the upper end of the first electric telescopic rod (531). An arc-shaped brush strip (533) is fixedly connected to one side of the connecting frame (532). An movable groove is provided on one side of the embedded housing (51) for the connecting frame (532) to move. The outer surface of the arc-shaped brush strip (533) is in contact with the inner wall of the connector hole.

4. The trenching guide device for the second-stage trenching of the ultra-deep seepage-proof wall joint hole according to claim 3, characterized in that, A protective housing (534) is fixedly connected to the lower middle part of the connecting frame (532). A motor (537) is fixedly connected inside the protective housing (534). The output end of the motor (537) passes through the protective housing (534) and is fixedly connected to a filter screen plate (535). The center of the filter screen plate (535) is set as a solid disc. The lower surface of the protective housing (534) contacts the center of the filter screen plate (535). A sliding ring (536) is slidably connected to the inner wall of the housing (51). The outer surface of the filter screen plate (535) is rotatably connected to the inner side of the sliding ring (536).

5. The trenching guide device for the second-stage trenching of the ultra-deep seepage-proof wall joint hole according to claim 4, characterized in that, The connecting component (56) includes a fixed ring (561) that is fixedly connected through the filter screen (535) and an embedded ring (563) that is movably disposed on the upper end of the fixed ring (561). The lower end of the embedded ring (563) is fixedly connected to an anti-detachment ring that is movably engaged with the fixed ring (561). The upper end of the embedded ring (563) is fixedly connected to a magnetic ring (562), and the magnetic ring (562) is magnetically connected to the lower end of the slurry discharge branch pipe (33).

6. The trenching guide device for the second-stage trenching of the ultra-deep seepage-proof wall joint hole according to claim 5, characterized in that, The fixed ring (561) is internally connected to a spring telescopic rod (564) and a blocking block (565), and multiple sets of spring telescopic rods (564) and blocking blocks (565) are arranged alternately. The lower ends of the multiple sets of spring telescopic rods (564) are fixedly connected to a blocking disc (566), and the outer surface of the blocking disc (566) is in contact with the inner wall of the fixed ring (561).

7. The trenching guide device for the second-stage trenching of the ultra-deep seepage-proof wall joint hole according to claim 5, characterized in that, The extrusion plate (54) has a relief groove on its lower surface that matches the mesh of the filter screen plate (535), and the extrusion plate (54) is positioned above the filter screen plate (535). The mesh of the support screen plate (57) overlaps with the mesh of the filter screen plate (535), and the support screen plate (57) is positioned below the filter screen plate (535). The embedded assembly (55) includes a second electric telescopic rod (551) fixedly connected to the inner wall of the embedded housing (51) and a transmission connecting plate (552) fixedly connected to the upper end of the second electric telescopic rod (551). The second electric telescopic rod (551) and Two sets of transmission connecting plates (552) are arranged at intervals. Multiple sets of fixing plates (553) are fixedly connected to the upper ends of the two sets of transmission connecting plates (552). Top rods (554) are fixedly connected to the upper ends of the multiple sets of fixing plates (553). Multiple sets of top rods (554) are arranged. The multiple sets of top rods (554) are evenly arranged below the mesh of the support mesh plate (57). The support mesh plate (57) and the extrusion plate (54) are both provided with clearance holes with the same outer diameter as the fixing ring (561). The multiple sets of fixing plates (553) arranged below the fixing ring (561) are disconnected in the middle.

8. The trenching guide device for the second-stage trenching of the ultra-deep seepage-proof wall joint hole according to claim 1, characterized in that, The upper guide assembly (2) is slidably connected to one side of the twin-wheel grooving machine (1) by a T-shaped connecting plate (22). One side of the T-shaped connecting plate (22) is connected to a sliding housing (21) by bolt thread. The other side of the T-shaped connecting plate (22) is provided with a clamping part (23). The clamping part (23) includes a driving part and a clamping plate. The clamping plate of the clamping part (23) is embedded and movably connected to one side of the twin-wheel grooving machine (1).

9. A trenching guide device for the second-stage trenching of an ultra-deep seepage-proof wall joint hole according to claim 8, characterized in that, An installation block (25) is fixedly connected to the upper end of the sliding housing (21). A fourth electric telescopic rod (26) is fixedly connected to both sides of the installation block (25). A limit strip (24) is fixedly connected to one end of each of the two sets of fourth electric telescopic rods (26). The two sets of limit strips (24) are respectively connected to both sides of the sliding housing (21) through a movable connection.

10. A method for guiding the formation of a second-stage trench for an ultra-deep seepage-proof wall joint hole, characterized in that, The device for guiding the second-stage trenching of the ultra-deep seepage barrier joint hole as described in claim 9 further includes the following steps: S1: Move the embedded housing (51) above the connector hole so that the twin-wheel milling machine (1) moves downward; S2: Insert the embedded housing (51) into the joint hole, and mill the groove downwards using the double wheel milling machine (1). Continuously inject mud and water into the lower end of the double wheel milling machine (1), and at the same time inject gas through the air inlet pipe (32). S3: The filter screen (535) and the support screen (57) continuously cut large particles of slag, and the extrusion plate (54) and the top rod (554) intermittently crush the hard slag stuck on the filter screen (535). At the same time, the mud and slag are discharged through the slurry branch pipe (33) and the slag discharge main pipe. S4: As the twin-wheel grooving machine (1) grooves, the connecting housing (4), the fixed housing (31), and the sliding housing (21) will enter the joint hole. Then, the sliding housing (21) will be fixed on one side of the twin-wheel grooving machine (1) near the upper end. The grooving direction of the twin-wheel grooving machine (1) can be fixed by the guidance of the sliding housing (21), the fixed housing (31), the connecting housing (4), and the embedded housing (51). S5: After the milling is completed, move the double wheel milling machine (1) and the embedded housing (51) upward out of the second-stage groove and clean the second-stage groove section.

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