A deep foundation hole digging device and a method of using the same

Abstract

This invention provides a deep foundation pit excavation device, comprising a tracked vehicle body with a telescopic lifting boom hinged to it. A hydraulic cylinder is installed between the telescopic lifting boom and the vehicle body to control the tilt angle of the telescopic lifting boom relative to the ground. An electric hoist is installed at the free end of the telescopic lifting boom, comprising a lifting rope and a hook. The lifting rope passes over a pulley in the hook. The hook is connected via the lifting rope to a drilling component for excavating holes in the ground or a grabbing component for grabbing excavated soil. The deep foundation pit excavation device provided by this invention, with its collaborative working structure of the drilling and grabbing components, facilitates the gradual deepening of the foundation pit. Furthermore, the equipment can operate without being limited by site space or geological conditions during excavation, ensuring excavation efficiency. It is not only convenient for construction but also for operation, solving the problem of inefficient deep foundation pit excavation in existing technologies.

Description

Technical Field

[0001] This invention belongs to the technical field of excavation equipment, specifically relating to a deep foundation pit excavation equipment and its usage method. Background Technology

[0002] The shapes of deep foundation pits include rectangles, polygons, and circles. The deep foundation pits mentioned in this patent application mainly refer to circular deep foundation pits, which can make full use of the arching effect of the soil, reduce the soil pressure acting on the support structure, and transform the soil pressure acting on the support structure into internal pressure, thereby giving full play to the compressive strength of concrete.

[0003] Excavators are frequently used in deep foundation pit excavation, with long-arm excavators being widely employed. However, when excavating deep foundation pits with diameters of several meters or tens of meters and depths exceeding ten or even tens of meters, the existing application of long-arm excavators suffers from drawbacks such as limited excavation depth, large operating space requirements, low excavation efficiency, high initial and modification costs, and high safety risks. Furthermore, if the surrounding soil is weak or the space is confined, it is difficult to lower a large construction excavator, making it challenging to meet construction requirements.

[0004] Therefore, it is necessary to design a new excavation equipment for deep foundation pits to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a deep foundation pit excavation device and its usage method, the specific solution of which is as follows: A deep foundation pit excavation device includes a tracked vehicle body, on which a telescopic lifting boom is hinged. A hydraulic cylinder is provided between the telescopic lifting boom and the vehicle body to control the tilt angle of the telescopic lifting boom relative to the ground. An electric hoist is provided at the free end of the telescopic lifting boom. The electric hoist includes a lifting rope and a hook. The lifting rope passes around a pulley in the hook. The hook is connected to a drilling component for excavating holes in the ground or a gripping component for grabbing soil blocks via the lifting rope.

[0006] Based on the above, the drilling assembly includes a hydraulic cylinder three. The top of the hydraulic cylinder three is provided with a lifting ring one for the hoisting rope to pass through. Multiple sets of clamps one are also fixed to the outside of the hydraulic cylinder three. Multiple sidewall support blocks one are provided around the hydraulic cylinder three. Each set of clamps one is connected to the sidewall support block one via a connecting plate one. The two ends of the connecting plate one are hinged to the clamps one and the sidewall support block one, respectively. A positioning ring one is also provided on the hydraulic cylinder three. The positioning ring one is connected to the sidewall support block one via a hydraulic cylinder four. The two ends of the hydraulic cylinder four are hinged to the positioning ring one and the sidewall support block one, respectively. A positioning disk is also rotatably mounted on the hydraulic cylinder three. Three guide rails are fixed on the positioning disk. A mounting frame is connected to the telescopic end of the hydraulic cylinder three via a turntable. A sliding sleeve is hinged to the bottom of the mounting frame via three hinge brackets. The three sliding sleeves slide in cooperation with the three guide rails. A drive motor is mounted on the sliding sleeve, and a drill bit is mounted on the power output end of the drive motor.

[0007] Based on the above, the three drill bits are all distributed on the same circular trajectory.

[0008] Based on the above, the turntable is driven to rotate by a stepper motor.

[0009] Based on the above, the gripping assembly includes a hydraulic cylinder six. The top of the hydraulic cylinder six is ​​provided with a lifting ring two for the hoisting rope to pass through. The hydraulic cylinder six itself also has multiple sets of clamps two. Multiple sidewall support blocks two are provided around the hydraulic cylinder six. Each set of clamps two is connected to multiple sidewall support blocks two via multiple connecting plates two. The two ends of the connecting plates two are hinged to the clamps two and the sidewall support blocks two, respectively. A lifting plate is connected to the telescopic end of the hydraulic cylinder six. The bottom end of the lifting plate is fixedly connected to a mounting plate via multiple connecting rods. The mounting plate has multiple through holes, and a pin is provided at each through hole. A claw rod is hinged to the pin, and the claw rod has a stroke groove. A hydraulic cylinder eight is provided on the mounting plate. An adjusting plate is provided at the telescopic end of the hydraulic cylinder eight. The adjusting plate has multiple notches, and a support rod passing through the stroke groove is provided at each notch.

[0010] Based on the above, the vehicle body is hinged with multiple telescopic support arms, and a hydraulic cylinder is provided between the telescopic support arms and the vehicle body to control the tilt angle of the telescopic support arms relative to the ground.

[0011] Based on the above, the end of the telescopic support arm is hinged with a support foot.

[0012] Based on the above, a pressure sensor is provided between the telescopic end of the hydraulic cylinder six and the lifting plate.

[0013] Based on the above, pressure sensor 2 is provided at the telescopic end and the adjusting plate of the hydraulic cylinder 8.

[0014] The method of using the aforementioned deep foundation pit excavation equipment is characterized by the following steps: Step 1: First, dig a foundation pit 2-3m deep using an excavator, and the diameter of the foundation pit shall not be less than the circular track formed by the outer sides of the three drill bits. Step 2: Then move the vehicle body to the vicinity of the pit, control the extension end of each telescopic support arm to extend, and then control the extension end of the hydraulic cylinder to extend so that the support foot is stably attached to the ground. Step 3: Next, connect the lifting ring one of the drilling assembly to the hook in the electric hoist using the lifting rope. Control the telescopic lifting arm to tilt at a suitable angle using the hydraulic cylinder two, and then control the telescopic lifting arm to extend to a suitable length so that the drilling assembly is facing the foundation pit. Step 4: Control the release of the pull rope in the electric hoist so that the drilling assembly enters the pit. Then control the extension end of the hydraulic cylinder four to extend so that the side wall support block one fits against the inner wall of the pit. Step 5: Next, start the drive motor to make the drill bit rotate, and then control the extension end of the hydraulic cylinder three to extend and drill holes at the bottom of the pit. After the extension end of the hydraulic cylinder three is fully extended, control it to retract. Step 6: Next, control the stepper motor to rotate a certain angle, and then control the extension and retraction end of the hydraulic cylinder three to complete one extension and retraction, and the drill bit to complete one drilling. Repeat this process until an annular groove that fits the pit is drilled. Step 7: Next, use the electric hoist to retract the pull rope to remove the drilling assembly from the pit, then detach the hoisting rope from the first lifting ring, remove the drilling assembly, and connect the second lifting ring to the hook in the electric hoist using the hoisting rope. Step 8: Next, place the gripping component into the pit, then control the extension end of hydraulic cylinder seven to extend so that the side wall support block two fits against the inner wall of the pit. Then control the extension end of hydraulic cylinder eight to extend, and then control the extension end of hydraulic cylinder six to extend so that the claw rod extends into the debris broken by the drill bit. Step 9: Next, control the extension end of hydraulic cylinder eight to extend, so that the claw rod can grab the debris and rock core. Step 10: Then control the electric hoist to retract the rope, remove the grabbed object from the pit, and control the extension and retraction of the telescopic boom to move the grabbing component away from the pit. Then control the extension and retraction end of the hydraulic cylinder eight to retract, so that the claw rod puts the grabbed object down. Step 11: Repeat steps 8-10 to grab the slag and rocks in the foundation pit; Step 12: Repeat steps 3-11 to deepen the foundation pit.

[0015] This invention has outstanding substantive features and significant progress compared to the prior art. Specifically, this invention has the following advantages: The deep foundation pit excavation equipment provided by this invention adopts a scheme design that uses drilling components and gripping components to work together, which facilitates the gradual deepening of foundation pits. During the excavation process, the equipment can operate without being limited by site space and geological conditions, ensuring excavation efficiency. It is not only easy to construct, but also easy to operate and use, solving the problem of the difficulty in efficiently excavating deep foundation pits in the prior art. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the hole-drilling structure of the present invention; Figure 2 yes Figure 1 Schematic diagram of the punching assembly; Figure 3 This is a schematic diagram of the drill bit's hole distribution in the foundation pit according to the present invention; Figure 4 This is a schematic diagram of the gripping component in the present invention gripping a stone. Figure 5 This is a schematic diagram of the gripping component in this invention; Figure 6 yes Figure 5 Schematic diagram of the structure at point A in the middle; Figure 7 This is a schematic diagram of the mounting plate in this invention; In the diagram: 1. Vehicle body; 2. Telescopic support arm; 3. Support foot; 4. Hydraulic cylinder one; 5. Telescopic lifting arm; 6. Hydraulic cylinder two; 7. Electric hoist; 7-1. Pull rope; 7-2. Hook; 8. Lifting rope; 9. Drilling assembly; 9-1. Hydraulic cylinder three; 9-2. Lifting ring one; 9-3. Clamp one; 9-4. Side wall support block one; 9-5. Connecting plate one; 9-6. Hydraulic cylinder four; 9-7. Turntable; 9-8. Mounting bracket; 9-9. Guide rail; 9-10. Hinge bracket; 9-11. Sliding sleeve; 9-12. Drive motor; 9-13. Drill. Head; 9-14. Positioning plate; 10. Gripping assembly; 10-1. Hydraulic cylinder six; 10-2. Lifting ring two; 10-3. Clamp two; 10-4. Connecting plate two; 10-5. Side wall support block two; 10-6. Hydraulic cylinder seven; 10-7. Lifting plate; 10-8. Connecting rod; 10-9. Mounting plate; 10-10. Through hole; 10-11. Claw rod; 10-11-1. Stroke groove; 10-12. Hydraulic cylinder eight; 10-13. Pressure sensor one; 10-16. Pin shaft; 10-17. Support rod; 11. Foundation pit. Detailed Implementation

[0017] The technical solution of the present invention will be further described in detail below through specific embodiments. Example

[0018] like Figure 1-7As shown, the present invention provides a deep foundation pit excavation device, including a tracked vehicle body 1, on which a telescopic lifting arm 5 is hinged. A hydraulic cylinder 6 for controlling the tilt angle of the telescopic lifting arm 5 relative to the ground is provided between the telescopic lifting arm 5 and the vehicle body 1. An electric hoist 7 is provided at the free end of the telescopic lifting arm 5. The electric hoist 7 includes a lifting rope 7-1 and a hook 7-2. The lifting rope 7-1 passes around a pulley in the hook 7-2. The hook 7-2 is connected to a drilling component 9 for excavating holes in the ground or a gripping component 10 for grabbing soil blocks via a lifting rope 8.

[0019] The aforementioned drilling assembly 9 includes a hydraulic cylinder 9-1, the top of which is provided with a lifting ring 9-2 for the hoisting rope 8 to pass through. Multiple sets of clamps 9-3 are also fixed to the outside of the hydraulic cylinder 9-1. Multiple sidewall support blocks 9-4 are provided around the hydraulic cylinder 9-1. Each clamp 9-3 is connected to the sidewall support block 9-4 via a connecting plate 9-5. The two ends of the connecting plate 9-5 are hinged to the clamps 9-3 and the sidewall support blocks 9-4, respectively. A positioning ring is also provided on the hydraulic cylinder 9-1, which is connected to the sidewall support block 9-4 via a hydraulic cylinder 9-6. The two ends of the hydraulic cylinder 9-6 are respectively hinged to the positioning ring 1 and the side wall support block 9-4; the hydraulic cylinder 9-1 is also rotatably equipped with a positioning disk 9-14, and three guide rails 9-9 are fixed on the positioning disk 9-14; the telescopic end of the hydraulic cylinder 9-1 is connected to a mounting bracket 9-8 through a turntable 9-7, and the bottom of the mounting bracket 9-8 is hinged to a sliding sleeve 9-11 through three hinge brackets 9-10. The three sliding sleeves 9-11 are respectively slidably engaged with the three guide rails 9-9, and a drive motor 9-12 is provided on the sliding sleeve 9-11. The power output end of the drive motor 9-12 is equipped with a drill bit 9-13.

[0020] The three drill bits 9-13 mentioned above are all distributed on the same circular trajectory.

[0021] To facilitate the rotation of the turntable 9-7 to adjust the drilling position of the drill bit 9-13, the turntable 9-7 is driven to rotate by a stepper motor.

[0022] The aforementioned gripping component 10 is used to grip the excavated soil and rocks from the foundation pit by the drilling component. It includes a hydraulic cylinder 10-1, with a lifting ring 10-2 at its top for the hoisting rope 8 to pass through. The hydraulic cylinder 10-1 also has multiple sets of clamps 10-3, and multiple sidewall support blocks 10-5 are arranged around it. Each clamp 10-3 is connected to multiple sidewall support blocks 10-5 via multiple connecting plates 10-4. The two ends of the connecting plates 10-4 are hinged to the clamps 10-3 and the sidewall support blocks 10-5, respectively. The extension and retraction of the hydraulic cylinder 10-1... The device is connected to a lifting plate 10-7 at one end. The bottom end of the lifting plate 10-7 is fixedly connected to the mounting plate 10-9 via multiple connecting rods 10-8. The mounting plate 10-9 has multiple through holes 10-10. A pin 10-16 is provided at each through hole 10-10. A claw rod 10-11 is hinged to the pin 10-16. The claw rod 10-11 has a stroke groove 10-11-1. The mounting plate 10-9 is equipped with a hydraulic cylinder 10-12. The telescopic end of the hydraulic cylinder 10-12 is equipped with an adjusting plate. The adjusting plate has multiple notches. A support rod 10-17 passing through the stroke groove 10-11-1 is provided at each notch.

[0023] During operation, in order to provide stable support for the vehicle body 1, multiple telescopic support arms 2 are hinged to the vehicle body 1. A hydraulic cylinder 4 is provided between the telescopic support arms 2 and the vehicle body 1 to control the tilt angle of the telescopic support arms 2 relative to the ground.

[0024] To improve the stability of the equipment during operation, a support foot 3 is hinged to the end of the telescopic support arm 2.

[0025] When the gripping component 10 enters the pit 11 for operation, in order to facilitate the control of the force of the claw rod 10-11 extending into the debris, a pressure sensor 10-13 is provided between the telescopic end of the hydraulic cylinder 10-1 and the lifting plate 10-7.

[0026] When grabbing objects such as slag and rocks in the foundation pit, pressure sensors are installed on the telescopic end and adjustment plate of the hydraulic cylinder 810-12 to facilitate control of the grabbing force.

[0027] The method of using the aforementioned deep foundation pit excavation equipment is characterized by the following steps: Step 1: First, dig a foundation pit 11 2-3m deep using an excavator, and the diameter of the foundation pit 11 shall not be less than the circular track formed by the outer sides of the three drill bits 9-13. Step 2: Then move the vehicle body 1 to the vicinity of the pit 11, control the extension end of each telescopic support arm 2 to extend, and then control the extension end of the hydraulic cylinder 4 to extend so that the support foot 3 is stably attached to the ground. Step 3: Next, connect the lifting ring 9-2 of the drilling assembly 9 to the hook 7-2 in the electric hoist 7 using the lifting rope 8. Control the telescopic lifting arm 5 to tilt at a suitable angle using the hydraulic cylinder 6, and then control the telescopic lifting arm 5 to extend to a suitable length so that the drilling assembly 9 is facing the pit 11. Step 4: Control the release of the pull rope 7-1 in the electric hoist 7, so that the drilling component 9 enters the pit 11. Then control the extension end of the hydraulic cylinder 9-6 to extend, so that the side wall support block 9-4 fits against the inner wall of the pit 11. Step 5: Next, start the drive motor 9-12 to make the drill bit 9-13 rotate, and then control the extension end of the hydraulic cylinder 9-1 to extend and drill holes at the bottom of the pit 11. After the extension end of the hydraulic cylinder 9-1 is fully extended, control it to retract. Step 6: Next, control the stepper motor to rotate a certain angle, and then control the extension end of the hydraulic cylinder 9-1 to complete one extension and retraction, and the drill bit 9-13 to complete one drilling. Repeat this process until an annular groove that fits the pit 11 is drilled. Step 7: Next, use the electric hoist 7 to retract the pull rope 7-1 to remove the drilling component 9 from the pit 11. Then, detach the lifting rope 8 from the lifting ring 9-2, remove the drilling component 9, and connect the lifting ring 10-2 to the hook 7-2 in the electric hoist 7 using the lifting rope 8. Step 8: Next, place the gripping component 10 into the pit 11, and then control the extension end of the hydraulic cylinder 7 10-6 to extend so that the side wall support block 2 10-5 fits against the inner wall of the pit 11. Then control the extension end of the hydraulic cylinder 8 10-12 to extend, and then control the extension end of the hydraulic cylinder 6 10-1 to extend so that the claw rod 10-11 extends into the debris broken by the drill bit 9-13. Step 9: Next, control the extension end of hydraulic cylinder 8 10-12 to extend, so that claw rod 10-11 can grab the debris and rock core. Step 10: Then control the pull rope 7-1 of the electric hoist 7 to retract, take the grabbed object out of the pit 11, and control the extension and retraction of the telescopic boom 5 to move the grabbing component 10 away from the pit 11. Then control the extension and retraction end of the hydraulic cylinder 8 10-12 to retract, so that the claw bar 10-11 will put down the grabbed object. Step 11: Repeat steps 8-10 to grab the slag and rocks in the foundation pit 11; Step 12: Repeat steps 3-11 to deepen the depth of the foundation pit 11.

[0028] It should be noted that the telescopic boom 5 and telescopic support boom 2 are controlled by multiple hydraulic cylinders (cylinder 1 and cylinder 2) for extension and retraction. During the excavation of the deep foundation pit 11, the operation of each of the above-mentioned electrical devices is controlled by a controller, so as to facilitate the control of the construction site by the workers.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A deep foundation pit excavation device, characterized in that: The system includes a tracked vehicle body (1), on which a telescopic lifting arm (5) is hinged. A hydraulic cylinder (6) is provided between the telescopic lifting arm (5) and the vehicle body (1) to control the tilt angle of the telescopic lifting arm (5) relative to the ground. An electric hoist (7) is provided at the free end of the telescopic lifting arm (5). The electric hoist (7) includes a lifting rope (7-1) and a hook (7-2). The lifting rope (7-1) passes around the pulley in the hook (7-2). The hook (7-2) is connected to a drilling assembly (9) for digging holes in the ground or a grabbing assembly (10) for grabbing slag blocks via a lifting rope (8).

2. The deep foundation pit excavation equipment according to claim 1, characterized in that: The drilling assembly (9) includes a hydraulic cylinder three (9-1), the top of which is provided with a lifting ring one (9-2) for the hoisting rope (8) to pass through. Multiple sets of clamps one (9-3) are also fixed to the outside of the hydraulic cylinder three (9-1). Multiple side wall support blocks one (9-4) are provided around the hydraulic cylinder three (9-1). Each set of clamps one (9-3) is connected to the side wall support block one (9-4) via a connecting plate one (9-5). The two ends of the connecting plate one (9-5) are hinged to the clamps one (9-3) and the side wall support block one (9-4) respectively. A positioning ring one is also provided on the hydraulic cylinder three (9-1), and the positioning ring one is connected to the side wall support block one (9-4) via a hydraulic cylinder four (9-6). The two ends of the hydraulic cylinder four (9-6) are respectively hinged to the positioning ring one and the side wall support block one (9-4); the hydraulic cylinder three (9-1) is also rotatably provided with a positioning disk (9-14), and three guide rails (9-9) are fixed on the positioning disk (9-14); the telescopic end of the hydraulic cylinder three (9-1) is connected to a mounting bracket (9-8) through a turntable (9-7), and the bottom of the mounting bracket (9-8) is hinged with a sliding sleeve (9-11) through three hinge brackets (9-10). The three sliding sleeves (9-11) are respectively slidably engaged with the three guide rails (9-9), and a drive motor (9-12) is provided on the sliding sleeve (9-11). The power output end of the drive motor (9-12) is provided with a drill bit (9-13).

3. The deep foundation pit excavation equipment according to claim 2, characterized in that: The three drill bits (9-13) are all distributed on the same circular trajectory.

4. The deep foundation pit excavation equipment according to claim 3, characterized in that: The turntable (9-7) is driven to rotate by a stepper motor.

5. The deep foundation pit excavation equipment according to claim 4, characterized in that: The gripping assembly (10) includes a hydraulic cylinder six (10-1), the top of which is provided with a lifting ring two (10-2) for the hoisting rope (8) to pass through. The hydraulic cylinder six (10-1) itself is also provided with multiple sets of clamps two (10-3). Multiple side wall support blocks two (10-5) are provided around the hydraulic cylinder six (10-1). Each set of clamps two (10-3) is connected to multiple side wall support blocks two (10-5) through multiple connecting plates two (10-4). The two ends of the connecting plates two (10-4) are hinged to the clamps two (10-3) and the side wall support blocks two (10-5) respectively. The telescopic end of the hydraulic cylinder six (10-1) is connected to a lifting plate (10-7). The bottom end of the lifting plate (10-7) is fixedly connected to the mounting plate (10-9) by multiple connecting rods (10-8). The mounting plate (10-9) is provided with multiple through holes (10-10). A pin (10-16) is provided at the through hole (10-10). A claw rod (10-11) is hinged on the pin (10-16). A stroke groove (10-11-1) is provided on the claw rod (10-11). A hydraulic cylinder eight (10-12) is provided on the mounting plate (10-9). An adjusting plate is provided at the telescopic end of the hydraulic cylinder eight (10-12). The adjusting plate is provided with multiple notches. A support rod (10-17) passing through the stroke groove (10-11-1) is provided at the notch.

6. The deep foundation pit excavation equipment according to claim 5, characterized in that: Multiple telescopic support arms (2) are hinged on the vehicle body (1), and a hydraulic cylinder (4) is provided between the telescopic support arms (2) and the vehicle body (1) to control the tilt angle of the telescopic support arms (2) relative to the ground.

7. The deep foundation pit excavation equipment according to claim 6, characterized in that: The telescopic support arm (2) is hinged at the end with a support foot (3).

8. The deep foundation pit excavation equipment according to claim 7, characterized in that: Pressure sensor 1 (10-13) is provided between the telescopic end of the hydraulic cylinder 6 (10-1) and the lifting plate (10-7).

9. The deep foundation pit excavation equipment according to claim 8, characterized in that: Pressure sensor 2 is provided at the telescopic end and the adjusting plate of the hydraulic cylinder 8 (10-12).

10. The method of using the deep foundation pit excavation equipment according to claim 9, characterized in that... Includes the following steps: Step 1: First, dig a foundation pit (11) 2-3m deep using an excavator, and the diameter of the foundation pit (11) is not less than the circular track formed by the outer sides of the three drill bits (9-13); Step 2: Then move the vehicle body (1) to the vicinity of the pit (11), control the extension end of each telescopic support arm (2) to extend, and then control the extension end of the hydraulic cylinder (4) to extend so that the support foot (3) is stably attached to the ground. Step 3: Next, connect the lifting ring 1 (9-2) of the drilling assembly (9) to the hook (7-2) in the electric hoist (7) through the lifting rope (8), control the telescopic lifting arm (5) to tilt at a suitable angle through the hydraulic cylinder 2 (6), and then control the telescopic lifting arm (5) to extend to a suitable length so that the drilling assembly (9) faces the pit (11). Step 4: Control the release of the pull rope (7-1) in the electric hoist (7) so that the drilling assembly (9) enters the pit (11), and then control the extension end of the hydraulic cylinder four (9-6) to extend so that the side wall support block one (9-4) fits against the inner wall of the pit (11); Step 5: Next, start the drive motor (9-12) to make the drill bit (9-13) rotate, and then control the extension end of the hydraulic cylinder three (9-1) to extend and drill holes at the bottom of the pit (11). When the extension end of the hydraulic cylinder three (9-1) is fully extended, control it to retract. Step 6: Next, control the stepper motor to rotate a certain angle, and then control the extension end of the hydraulic cylinder three (9-1) to complete one extension and retraction, and the drill bit (9-13) to complete one drilling again. Repeat this process until an annular groove that fits the pit (11) is drilled. Step 7: Next, use the electric hoist (7) to pull up the rope (7-1) to take the drilling assembly (9) out of the pit (11), then disconnect the lifting rope (8) from the first lifting ring (9-2), remove the drilling assembly (9), and connect the second lifting ring (10-2) to the hook (7-2) in the electric hoist (7) through the lifting rope (8); Step 8: Next, place the gripping component (10) into the pit (11), and then control the extension end of the hydraulic cylinder seven (10-6) to extend so that the side wall support block two (10-5) fits against the inner wall of the pit (11). Then control the extension end of the hydraulic cylinder eight (10-12) to extend, and then control the extension end of the hydraulic cylinder six (10-1) to extend so that the claw rod (10-11) extends into the debris broken by the drill bit (9-13). Step 9: Next, extend the telescopic end of hydraulic cylinder 8 (10-12) so that the claw rod (10-11) can grab the debris and rock core. Step 10: Then control the pull rope (7-1) of the electric hoist (7) to retract, take the grabbed object out of the pit (11), and control the extension and retraction of the telescopic boom (5) to make the grabbing component (10) move away from the pit (11). Then control the extension and retraction end of the hydraulic cylinder (10-12) to retract, so that the claw (10-11) puts the grabbed object down. Step 11: Repeat steps 8-10 to grab the slag and rocks in the foundation pit (11); Step 12: Repeat steps 3-11 to deepen the depth of the foundation pit (11).

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