A drilling device and method for simultaneous soil removal

Abstract

This invention relates to the technical field of drilling equipment for power transmission tower foundation piles, and discloses a drilling device and method for simultaneous soil removal. The drilling device for simultaneous soil removal includes a drill rod, a steel casing, a mud suction pump, and a clean water pump. The drill rod has a mud suction chamber inside, and a mud suction hole communicating with the mud suction chamber is provided on the outer wall of the drill rod. The steel casing is sleeved around the drill rod, and a clean water chamber is provided inside the steel casing. A clean water hole communicating with the clean water chamber is opened on the inner wall of the steel casing. The inlet end of the mud suction pump is connected to the mud suction hole and the mud suction chamber in sequence, and a sedimentation tank is provided at its outlet end. The clean water pump is connected to the clean water chamber. The clean water hole is configured to spray clean water directionally to the drilling area of ​​the drill rod, and the mud suction pump is configured to simultaneously pump the mud formed by mixing clean water in the drilling area. The clean water output end of the sedimentation tank is connected to the inlet end of the clean water pump to form a water circulation loop.

Description

Technical Field

[0001] This invention relates to the field of drilling equipment for power transmission tower foundation piles, and in particular to a drilling device and method for simultaneous soil removal. Background Technology

[0002] Power transmission towers have formed a large-scale distribution in complex terrain areas such as high altitude and mountainous areas. For the construction of large-diameter pile foundations in such mountainous areas, the traditional manual excavation pile technology is still the main method. In a few cases, modular mechanical equipment is used to assist in the operation. However, the problem of effectively and continuously removing broken soil and drill cuttings during the construction process has not been fundamentally solved. This seriously restricts the construction efficiency and brings significant safety risks.

[0003] Currently, some equipment solutions have emerged in the existing technology aimed at improving the above-mentioned process. For example, Chinese invention patent CN119572155B discloses a drilling equipment for power tower foundation piles and its soil removal method. This solution uses modular drilling equipment. During drilling, a power head drives a multi-stage segmented drill rod to rotate, and the drill bit is fixed to the bottom of the drill rod to break up the soil. However, its soil removal process has obvious limitations: the soil removal operation requires a complete interruption of the drilling process. Specifically, the power head is shut down, the drill rod is lifted as a whole by a lifting mechanism, and then manually disassembled into sections, leaving only the last section with the drill bit. This section is then lifted to the borehole opening, and the equipment is moved as a whole to move the drill rod away from the borehole. After that, the power head is restarted, and the drill bit is driven to rotate in the opposite direction to try to shake off the attached soil. Finally, several workers still need to use shovels and other tools for manual cleaning, resulting in low efficiency of the soil removal method, frequent interruptions in drilling operations, inability to achieve simultaneous drilling and soil removal, and high safety risks. Summary of the Invention

[0004] The purpose of this invention is to provide a drilling device and method for simultaneous soil removal, so as to improve the low working efficiency of the device in the prior art where drilling and soil removal cannot be carried out simultaneously.

[0005] To achieve the above objectives, the present invention provides a drilling device for simultaneous soil removal, comprising a drill rod, a steel casing, a mud pump, and a clean water pump. The drill rod has a mud suction chamber inside, and a mud suction hole communicating with the mud suction chamber is provided on the outer wall of the drill rod. The steel casing is fitted around the drill rod, and a clean water chamber is provided inside the steel casing. A clean water hole communicating with the clean water chamber is opened on the inner wall of the steel casing. The inlet end of the mud pump is sequentially connected to the mud suction hole and the mud suction chamber, and the outlet end of the mud pump is connected to the mud suction chamber, with a sedimentation tank provided at its outlet end. The clean water pump is connected to the clean water chamber. The clean water hole is configured to directionally spray clean water into the drilling area of ​​the drill rod, and the mud pump is configured to simultaneously pump mud formed by mixing clean water in the drilling area. The clean water output end of the sedimentation tank is connected to the inlet end of the clean water pump to form a water circulation loop.

[0006] In one embodiment, a spiral disk is fixed to the outer wall of the drill pipe. The spiral disk has a spiral structure that surrounds the drill pipe, and the outer radius of the spiral disk decreases gradually from top to bottom along the axial direction of the drill pipe.

[0007] In one embodiment, the outer wall of the drill rod is provided with a mud suction hood, the inlet of which is oriented toward the rotation direction of the drill rod, and its interior is in communication with the mud suction hole.

[0008] In one embodiment, the inlet of the sludge suction hood is provided with a filter hood with an arc-shaped cross-section.

[0009] In one embodiment, the steel casing includes multiple graded casings, which are sequentially spliced ​​along their axial direction, and adjacent graded casings are detachably connected by a locking mechanism.

[0010] In one embodiment, the locking mechanism includes a connecting rod, a connecting hook, a connecting groove, and a blocking part. The connecting rod is fixedly disposed at the bottom of a graded protective cylinder, the connecting hook is disposed on the outer wall of the connecting rod, the connecting groove is disposed at the top of another graded protective cylinder and is recessed toward the interior of the graded protective cylinder, the connecting groove is used for inserting the connecting rod, and the blocking part is disposed on the inner wall of the connecting groove, the blocking part is used to cooperate with the connecting hook to abut against it to form a block.

[0011] In one embodiment, the locking mechanism further includes a limiting bolt, a limiting screw hole is formed in the inner wall of the connecting groove, the limiting bolt is inserted into the limiting screw hole, and one side of the limiting bolt abuts against the side of the connecting rod away from the connecting hook.

[0012] In one embodiment, the sedimentation tank includes a primary sedimentation zone, a secondary sedimentation zone, and a filtration zone arranged sequentially along the direction of sludge flow. The primary sedimentation zone is connected to the outlet end of the sludge suction pump and has a sludge discharge valve at its bottom. The secondary sedimentation zone is connected to the primary sedimentation zone and has an addition pipe for adding flocculant. The filtration zone is connected to the secondary sedimentation zone and includes a pebble cushion layer, quartz sand filter media, and coconut shell activated carbon filter media filled from bottom to top. The top of the filtration zone constitutes the clear water output end of the sedimentation tank.

[0013] In another aspect, the present invention also proposes a soil removal method using the aforementioned synchronous soil removal drilling device, which includes the following steps: S1. Adjust the drill rod to align with the pile position, splice the steel casing according to the designed hole depth, connect the clean water pump and the mud pump, check the sealing and equipment status, and inject clean water into the sedimentation tank. S2. Start the drill rod to rotate and drill, and at the same time start the water pump to spray water into the drilling area through the water holes on the steel casing, which mixes with the rock and soil debris to form mud. S3. Start the suction pump to extract the mud from the borehole through the suction hole of the drill rod and the suction pump, and transport it to the sedimentation tank for treatment. The treated clean water is pumped back to the steel casing by the clean water pump for recycling. S4. After drilling to the designed depth, stop the drill rod rotation, keep the clean water pump running for a predetermined time to flush out the residue in the hole, then shut down all equipment and lift the drill rod and steel casing. S5. Repeat steps S1 to S4 to complete the subsequent pile foundation construction.

[0014] In one embodiment, in step S3, the slurry is introduced into the primary sedimentation zone for gravity sedimentation to remove large-diameter particles and form a primary treated liquid; the primary treated liquid is introduced into the secondary sedimentation zone and flocculants are added for flocculation and sedimentation to remove suspended fine particles and form a secondary treated liquid; the secondary treated liquid is introduced into the filtration zone and filtered through multiple layers of filter media to obtain clean water.

[0015] Compared with the prior art, the drilling device and soil removal method for simultaneous soil removal according to embodiments of the present invention have the following advantages: Clean water is sprayed directionally towards the center of the pile hole through the water holes on the inner wall of the steel casing. The clean water mixes with soil and rock cuttings under the stirring of the drill rod to form mud. At this time, the mud pump is used to pump the mud out, realizing real-time soil removal from the drilling equipment without interrupting the drilling operation. At the same time, the clean water sprayed out through the water holes in the clean water chamber can improve the cooling effect of the drill rod and reduce the safety hazards of construction. The steel casing, drill rod and mud pump work together to form a closed loop of simultaneous drilling and soil removal. The mud pumped by the mud pump is filtered through the sedimentation tank to separate the mud into clean water and soil, so that both can be reused, saving costs and realizing resource recycling, especially reducing the water transportation pressure of drilling in mountainous areas. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the drilling device for synchronous soil discharge according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram showing the positions of the steel casing and drill rod in the drilling device for synchronous soil removal according to an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the steel casing in the drilling device for synchronous soil removal according to an embodiment of the present invention.

[0019] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0020] Figure 5 This is a schematic diagram of the drill rod structure in the drilling device for synchronous soil discharge according to an embodiment of the present invention.

[0021] Figure 6 yes Figure 5Enlarged view of point B in the middle.

[0022] Figure 7 This is a schematic diagram of the sedimentation tank in the drilling device for simultaneous soil discharge according to an embodiment of the present invention.

[0023] In the diagram, 1 is the drill rod; 11 is the auger; 12 is the mud suction hood; 13 is the filter hood; and 14 is the mud suction hole. 2. Steel casing; 21. Clear water chamber; 211. Clear water hole; 22. Graded casing; 23. Locking mechanism; 231. Connecting rod; 232. Connecting hook; 233. Connecting groove; 234. Blocking part; 24. Limiting bolt; 3. Sludge suction pump; 4. Sedimentation tank; 41. Primary sedimentation zone; 411. Slag discharge valve; 42. Secondary sedimentation zone; 421. Addition pipe; 43. Filtration zone; 431. Pebble bedding layer; 432. Quartz sand filter media; 433. Coconut shell activated carbon filter media; 5. Clean water pump. Detailed Implementation

[0024] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0025] In the description of this invention, it should be understood that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on that other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to that other element. The terms "mounted," "connected," and "attached" should be interpreted broadly, for example, referring to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements or an interaction between two elements. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] In the description of this invention, it should be understood that the terms "height," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used in this invention to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0027] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0028] like Figure 1 refer to Figure 6 As shown in the figure, a preferred embodiment of the present invention provides a drilling device for simultaneous soil removal, which includes a drill rod 1, a steel casing 2, a mud suction pump 3, and a clean water pump 5. The drill rod 1 has a mud suction chamber inside, and a mud suction hole 14 communicating with the mud suction chamber is provided on the outer wall of the drill rod 1. The steel casing 2 is sleeved on the outer periphery of the drill rod 1, and a clean water chamber 21 is provided inside the steel casing 2. A clean water chamber 211 communicating with the clean water chamber 21 is opened on the inner wall of the steel casing 2. The inlet end of the mud suction pump 3 is sequentially connected to the mud suction hole 14 and the mud suction chamber, and a sedimentation tank 4 is provided at its outlet end. The clean water pump 5 is connected to the clean water chamber. The clean water chamber 211 is configured to spray clean water directionally to the drilling area of ​​the drill rod 1, and the mud suction pump 3 is configured to simultaneously pump the mud formed by mixing clean water in the drilling area. The clean water output end of the sedimentation tank 4 is connected to the inlet end of the clean water pump 5 to form a water circulation loop.

[0029] Based on the above technical features, in this embodiment of the invention, clean water is directionally sprayed towards the center of the pile hole through the clear water chamber 211 on the inner wall of the steel casing 2. The clean water, soil, and rock cuttings are mixed with the drill rod 1 to form mud. At this time, the mud suction pump 3 is used to pump the mud, realizing real-time soil removal from the drilling equipment without interrupting the drilling operation. At the same time, the clean water sprayed from the steel casing 2 can improve the cooling effect of the drill rod 1 and reduce the safety hazards of construction. The steel casing 2, drill rod 1, and mud suction pump 3 work together to form a closed loop of synchronous drilling and soil removal. The mud pumped by the mud suction pump 3 is filtered through the sedimentation tank 4 to separate the mud into clean water and soil, so that both can be reused, saving costs and realizing the recycling of resources, especially reducing the water transportation pressure of drilling in mountainous areas.

[0030] As some embodiments of the present invention, such as Figure 5 As shown, a spiral turntable 11 is fixed to the outer wall of the drill rod 1. The spiral turntable 11 has a spiral structure surrounding the drill rod 1, and the outer radius of the spiral turntable 11 decreases gradually from top to bottom along the axial direction of the drill rod 1. The spiral turntable 11 provides multi-point circumferential support for the drill rod 1, dispersing the radial force during rotation and reducing the risk of borehole deviation. The gradually decreasing radius can form layer gaps, allowing the lower layer of mud in the hole to flow smoothly from both sides of the turntable to the cuttings inlet, avoiding the mud accumulation problem that is prone to occur with traditional single-radius turntables, and improving cuttings removal efficiency. At the same time, the rotational torque and axial pressure of the drill rod 1 can be evenly distributed to the contact surfaces of each layer, avoiding local overload.

[0031] As some embodiments of the present invention, such as Figure 5 As shown, the outer wall of the drill rod 1 is provided with a mud suction hood 12. The inlet of the mud suction hood 12 is oriented towards the rotation direction of the drill rod 1, and its interior is connected to the mud suction hole 14. By setting up the mud suction hood 12, some mud can be forced into the mud suction chamber during the drilling process, reducing the pressure on the mud suction pump 3 and improving the mud suction efficiency.

[0032] As some embodiments of the present invention, such as Figure 5 As shown, a filter cover 13 with an arc-shaped cross-section is provided at the inlet of the mud suction cover 12. The filter cover 13 filters the mud, reducing the possibility of gravel and other debris entering the mud suction chamber. The arc-shaped cross-section of the filter cover 13 can reduce the resistance encountered by the drill rod 1 during rotation.

[0033] As some embodiments of the present invention, such as Figure 3 As shown, the steel casing 2 includes multiple graded casings 22, which are sequentially spliced ​​along its axial direction. Adjacent graded casings 22 are detachably connected via a locking mechanism 23. The steel casing 2 needs to be lowered gradually as the drilling depth increases; therefore, multiple graded casings 22 are spliced ​​together. This allows operators to flexibly adjust the number of graded casings 22 spliced ​​according to the specific designed hole depth, effectively improving the applicability of the device. The locking mechanism 23 prevents relative displacement between the graded casings 22, ensuring the verticality of the borehole and the stability of the borehole wall, providing a solid guarantee for construction safety.

[0034] As some embodiments of the present invention, such as Figure 3 and Figure 4 As shown, the locking mechanism 23 includes a connecting rod 231, a connecting hook 232, a connecting groove 233, and a blocking part 234. The connecting rod 231 is fixedly disposed at the bottom of a graded protective cylinder 22. The connecting hook 232 is disposed on the outer wall of the connecting rod 231. The connecting groove 233 is disposed at the top of another graded protective cylinder 22 and is recessed toward the interior of the graded protective cylinder 22. The connecting groove 233 is used for inserting the connecting rod 231. The blocking part 234 is disposed on the inner wall of the connecting groove 233. The blocking part 234 is used to cooperate with the connecting hook 232 to form a block after the connecting rod 231 is displaced along the width direction of the connecting groove 233. During assembly, the connecting rod 231 of the upper graded casing 22 is inserted into the connecting groove 233 of the lower graded casing 22. Then, the graded casing 22 is rotated, causing the connecting rod 231 at the bottom of the graded casing 22 to move along its width within the connecting groove 233. This causes the connecting hook 232 to rotate to the bottom of the blocking part 234. The connecting hook 232 then engages with the blocking part 234 to form a strong blocking force, effectively resisting interference from various external forces. This ensures that adjacent graded casings 22 are tightly connected into a whole, maintaining a stable position and state during construction, and providing a solid guarantee for project safety.

[0035] As some embodiments of the present invention, such as Figure 3 and Figure 4 As shown, the locking mechanism also includes a limiting bolt 24. A limiting screw hole is provided on the inner wall of the connecting groove 233, and the limiting bolt 24 is inserted into the limiting screw hole. One side of the limiting bolt 24 abuts against the side of the connecting rod 231 away from the connecting hook 232. There is a certain gap between the side of the connecting rod 231 away from the connecting hook 232 and the connecting groove 233. Inserting the limiting bolt 24 into this gap prevents the connecting rod 231 from swinging in the connecting groove 233, thereby achieving a reliable assembly of the two graded steel cylinders. At the same time, the bolt head can be countersunk to reduce the protruding structure on the surface of the steel casing 2, thus facilitating the insertion of the steel casing 2.

[0036] As some embodiments of the present invention, such as Figure 6 As shown, the sedimentation tank 4 includes a primary sedimentation zone 41, a secondary sedimentation zone 42, and a filtration zone 43 arranged sequentially along the direction of sludge flow. The primary sedimentation zone 41 is connected to the outlet end of the sludge suction pump 3, and a sludge discharge valve 411 is provided at its bottom. The secondary sedimentation zone 42 is connected to the primary sedimentation zone 41, and is provided with an addition pipe 421 for adding flocculant. The filtration zone 43 is connected to the secondary sedimentation zone 42, and includes a pebble cushion layer 431, a quartz sand filter media 432, and a coconut shell activated carbon filter media 433 filled from bottom to top. The top of the filtration zone 43 constitutes the clear water output end of the sedimentation tank 4. Through the design of the primary sedimentation zone 41, the secondary sedimentation zone 42, and the filtration zone 43, the mud sucked in by the mud pump 3 first enters the primary sedimentation zone 41, where larger rock fragments and soil debris begin to settle. A slag discharge valve 411 is installed at the bottom to remove slag every three hours. The mud then enters the secondary sedimentation zone 42, where flocculants are added through the addition pipe 421 to remove suspended fine particles in the water through flocculation. The mud then enters the filtration zone 43, where it undergoes three layers of filtration: a pebble cushion layer 431, a quartz sand filter media 432, and a coconut shell activated carbon filter media 433. This filters the mud into clean water that meets the requirements for return. The clean water that meets the standards is then pumped into the steel casing 2 through the clean water pump 5, forming a closed-loop water system. This achieves the recycling of water resources, reduces the water transport pressure in mountainous drilling, and allows the clean water to clean the drill rod 1 without the need for manual cleaning, further improving construction efficiency.

[0037] The working process of this invention is as follows: The drill rod 1 rotates under power drive, and multiple spiral discs 11 fixed to its outer wall rotate synchronously with the drill rod 1. Since the outer radii of the multiple spiral discs 11 decrease gradually from top to bottom, different depths of soil layers can be cut in stages during drilling, improving drilling efficiency and stability. The clean water pump 5 starts and delivers clean water to the clean water chamber inside the steel casing 2. The clean water is then sprayed directionally onto the drilling area of ​​the drill rod 1 through the clean water chamber 211 opened on the outer wall of the steel casing 2, cooling and lubricating the drilling parts, while simultaneously reducing drilling output. The raw drill cuttings are washed into mud; the mud pump 3 is turned on, and the inlet of the mud suction hood 12 on the outer wall of the drill rod 1 is set in the direction of rotation of the drill rod 1, which can more effectively collect the mud formed by mixing with clean water in the drilling area. The mud enters the mud suction chamber inside the drill rod 1 through the connecting channel between the inside of the mud suction hood 12 and the mud suction hole 14, and is then pumped to the sedimentation tank 4 by the mud suction pump 3. The clean water after multi-stage treatment in the sedimentation tank 4 is transported back to the inlet of the clean water pump 5 through the pipeline and re-enters the water circulation system to realize the recycling of clean water and reduce water waste.

[0038] Furthermore, when the drilling depth increases and the length of the steel casing 2 needs to be extended, a new staged casing 22 is spliced ​​with the original staged casing 22. The connecting rod 231 at the bottom of one staged casing 22 is inserted into the connecting groove 233 at the top of the other staged casing 22. The connecting rod 231 is rotated, causing the connecting hook 232 on the outer wall of the connecting rod 231 to engage with the blocking part 234 on the inner wall of the connecting groove 233, forming a barrier and achieving the initial connection of the two staged casings 22. To ensure a stable connection, a limiting bolt 24 is inserted into the limiting screw hole on the inner wall of the connecting groove 233, causing one side of the limiting bolt 24 to engage with the side of the connecting rod 231 away from the connecting hook 232, restricting the rotation of the connecting rod 231, thereby completing the secure connection of adjacent staged casings 22.

[0039] Another invention of the present invention proposes a soil removal method using the aforementioned synchronous soil removal drilling device, which includes the following steps: S1. Adjust drill rod 1 to align with the pile position, splice steel casing 2 according to the designed hole depth, connect water pump 5 and mud pump 3, check the sealing and equipment status, and inject clean water into sedimentation tank 4. Sufficient clean water needs to be injected into sedimentation tank 4, which means that water pump 5 can pump clean water into steel casing 2.

[0040] S2. Start the drill rod 1 to rotate and drill the hole. At the same time, start the water pump 5 and spray water into the drilling area through the water chamber 211 on the steel casing 2. Mix the water with the rock and soil debris to form mud. The drill rod 1 breaks the soil through the spiral turntable 1111 to form a pile hole. At the same time, start the water pump 5 to input water into the steel casing 2 and spray it directionally from the water chamber 211 to the breaking area of ​​the drill rod 1. Mix the water with the soil and rock debris to form mud.

[0041] S3. Start the mud suction pump 3 to extract the mud from the borehole through the mud suction hole 14 and the mud suction chamber of the drill rod 1, and transport it to the sedimentation tank 4 for treatment. The treated clean water is pumped back to the steel casing 2 by the clean water pump 5 for recycling. The specific process is as follows: start the mud suction pump 3, suck the mud into the borehole through the mud suction port of the drill rod 1, and then send it to the primary sedimentation zone 41 of the sedimentation tank 4 through the mud suction pump 3. After the mud undergoes three-stage sedimentation treatment in the sedimentation tank 4, the clean water pump 5 transports the filtered clean water to the steel casing 2 for recycling.

[0042] S4. After drilling to the designed depth, stop rotating drill rod 1 and keep water pump 5 running for a predetermined time to flush out the residue in the hole. Then, shut down all equipment, lift drill rod 1 and steel casing 2. When the drilling depth reaches the design requirements, stop drill rod 1 first, and keep water pump 5 running for 30 seconds to flush out the residual mud in the hole. After flushing, turn off mud pump 3 and water pump 55, lift drill rod 1 out of the borehole, and the soil removal construction is completed.

[0043] S5. Repeat steps S1 to S4 to complete the subsequent pile foundation construction.

[0044] As some embodiments of the present invention, in step S3, the slurry is introduced into the primary sedimentation zone 41 for gravity sedimentation to remove large-diameter particles and form a primary treated liquid; the primary treated liquid is introduced into the secondary sedimentation zone 42, and flocculants are added for flocculation and sedimentation to remove suspended fine particles and form a secondary treated liquid; the secondary treated liquid is introduced into the filtration zone 43 and filtered through multiple layers of filter media to obtain clean water.

[0045] Specifically, the slurry sucked in by the slurry pump first enters the primary sedimentation zone 41, where larger rock fragments and soil particles in the slurry settle quickly. A slag discharge valve 411 is installed at the bottom to remove slag every 3 hours. Then, the slurry enters the secondary sedimentation zone 42, where flocculants are added through an addition pipe to remove suspended fine particles in the water through flocculation. Subsequently, the slurry enters the filtration zone 43, where it undergoes three layers of filtration: a pebble cushion layer 431, a quartz sand filter media 432, and a coconut shell activated carbon filter media 433. This process filters the slurry into clean water that meets the requirements for return transport.

[0046] In summary, the present invention provides a drilling device and method for simultaneous soil removal. Compared with the prior art, its advantages are as follows: Water is sprayed directionally towards the center of the pile hole through the clear water chamber 211 on the inner wall of the steel casing 2. The water mixes with soil and rock cuttings under the stirring of the drill rod 1 to form mud. This mud is then pumped by the mud pump 3, enabling real-time soil removal from the drilling equipment without interrupting the drilling operation. Simultaneously, the water sprayed from the steel casing 2 enhances the cooling effect of the drill rod 1, reducing construction safety hazards. The steel casing 2, drill rod 1, and mud pump 3 work together to create a closed loop for simultaneous drilling and soil removal. The mud pumped by the mud pump 3 is filtered through the sedimentation tank 4, separating the mud into clear water and soil, allowing both to be reused, saving costs, and achieving resource recycling, especially reducing the water transport pressure in mountainous drilling areas.

[0047] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A drilling device for simultaneous soil removal, characterized in that, include: The drill rod has a mud suction chamber inside and a mud suction hole communicating with the mud suction chamber on its outer wall. A steel casing is fitted around the outer periphery of the drill rod. The interior of the steel casing is provided with a water cavity, and the inner wall of the steel casing is provided with a water hole communicating with the water cavity. A sludge suction pump, wherein the inlet end of the sludge suction pump is connected to the sludge suction chamber, the sludge suction chamber is connected to an external sludge source through the sludge suction hole to suck in sludge, and the outlet end of the sludge suction pump is connected to a sedimentation tank through a pipeline. A clean water pump, wherein the clean water pump is connected to the clean water chamber; The clear water hole is configured to spray clear water directionally into the drilling area of ​​the drill rod, the mud pump is configured to simultaneously pump the mud formed by mixing clear water in the drilling area, and the clear water output end of the sedimentation tank is connected to the inlet end of the clear water pump to form a water circulation loop.

2. The drilling device for simultaneous soil removal according to claim 1, characterized in that, A helical disc is fixed to the outer wall of the drill rod. The helical disc has a helical structure that surrounds the drill rod, and the outer radius of the helical disc decreases gradually from top to bottom along the axial direction of the drill rod.

3. The drilling device for simultaneous soil removal according to claim 2, characterized in that, The outer wall of the drill rod is provided with a mud suction hood, the inlet of which is oriented toward the rotation direction of the drill rod, and its interior is connected to the mud suction hole.

4. The drilling device for simultaneous soil removal according to claim 3, characterized in that, The inlet of the sludge suction hood is equipped with a filter cover with an arc-shaped cross section.

5. The drilling device for simultaneous soil removal according to claim 1, characterized in that, The steel casing includes multiple graded casings, which are sequentially spliced ​​along their axial direction, and adjacent graded casings are detachably connected by a locking mechanism.

6. The drilling device for simultaneous soil removal according to claim 5, characterized in that, The locking mechanism includes a connecting rod, a connecting hook, a connecting groove, and a blocking part. The connecting rod is fixedly disposed at the bottom of one of the graded protective cylinders. The connecting hook is disposed on the outer wall of the connecting rod. The connecting groove is disposed at the top of the other graded protective cylinder and is recessed towards the interior of the graded protective cylinder. The connecting groove is used for the insertion of the connecting rod. The blocking part is disposed on the inner wall of the connecting groove and is used to cooperate with the connecting hook to abut against it to form a block.

7. The drilling device for simultaneous soil removal according to claim 6, characterized in that, The locking mechanism also includes a limiting bolt. A limiting screw hole is provided on the inner wall of the connecting groove. The limiting bolt is inserted into the limiting screw hole, and one side of the limiting bolt abuts against the side of the connecting rod away from the connecting hook.

8. The drilling device for simultaneous soil removal according to claim 1, characterized in that, The sedimentation tank includes a primary sedimentation zone, a secondary sedimentation zone, and a filtration zone arranged sequentially along the direction of sludge flow. The primary sedimentation zone is connected to the outlet end of the sludge suction pump and has a sludge discharge valve at its bottom. The secondary sedimentation zone is connected to the primary sedimentation zone and has an addition pipe for adding flocculant. The filtration zone is connected to the secondary sedimentation zone and includes a pebble cushion layer, quartz sand filter media, and coconut shell activated carbon filter media filled from bottom to top. The top of the filtration zone constitutes the clear water output end of the sedimentation tank.

9. A method for removing soil, characterized in that, The drilling apparatus for simultaneous soil removal according to any one of claims 1 to 8, the soil removal method includes the following steps: S1. Adjust the drill rod to align with the pile position, splice the steel casing according to the designed hole depth, connect the clean water pump and the mud pump, check the sealing and equipment status, and inject clean water into the sedimentation tank. S2. Start the drill rod to rotate and drill, and at the same time start the water pump to spray water into the drilling area through the water holes on the steel casing, which mixes with the rock and soil debris to form mud. S3. Start the mud pump to extract the mud from the borehole through the mud suction hole and mud suction chamber of the drill rod and transport it to the sedimentation tank for treatment. The treated clean water is pumped back to the steel casing by the clean water pump for recycling. S4. After drilling to the designed depth, stop rotating the drill rod, keep the clean water pump running for a predetermined time to flush out the residue in the hole, then shut down all equipment and lift the drill rod and steel casing. S5. Repeat steps S1 to S4 to complete the subsequent pile foundation construction.

10. The soil removal method according to claim 9, characterized in that, In step S3, the slurry is introduced into the primary sedimentation zone for gravity sedimentation to remove large-diameter particles and form a primary treated liquid; the primary treated liquid is introduced into the secondary sedimentation zone and flocculants are added for flocculation and sedimentation to remove suspended fine particles and form a secondary treated liquid. The secondary treated liquid is introduced into the filtration zone and filtered through multiple layers of filter media to obtain clean water.

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