Pile foundation hole forming device and construction method

Abstract

The invention discloses a pile foundation hole forming device and a construction method, and relates to the technical field of pile foundation construction equipment and method.The pile foundation hole forming device comprises a drill rod and a supporting and positioning assembly used for stably supporting the drill rod on the earth surface near a drill hole, and a columnar cavity is formed in the drill rod; a plurality of through holes communicated with the columnar cavity are formed in the outer surface of the drill rod, metal scrapers are arranged in the through holes of the drill rod, mounting bases are arranged at the bottoms of the metal scrapers and connected with the inner walls of the through holes of the drill rod through rotating shafts, and electric telescopic rods are arranged in the columnar cavity of the drill rod. The output end of the electric telescopic rod is connected with a linkage piece, and the multiple metal scrapers are driven by the electric telescopic rod and under the action of the linkage piece to rotate at the same time. The drill bit has the effect of scraping off soil and chippings on the hole wall in the drilling process, so that the cleanliness of a drilled hole is guaranteed, and the drilling efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of pile foundation construction equipment and methods, and in particular to a pile foundation hole-forming device and a construction method. Background Art

[0002] Pile foundation drilling is an important part of construction. At present, pile foundation drilling mainly uses mechanical drilling by drilling rigs. Although this method is relatively efficient, the equipment cost is high and the technical requirements for operators are high. At present, the pile foundation drilling device includes a drilling rig, a mud circulation system, a mud treatment device and an intelligent control system. The drilling rig is used to drill holes. When the drill bit penetrates deep into the soil or rock, it will cut and crush it. The cut material will form mud and debris, which will adhere to the hole wall. The mud and debris on the hole wall will cause the rotation and feed speed of the drill bit to decrease, thereby reducing the drilling efficiency. If the drill bit is blocked by mud, it may need to be cleaned and adjusted more frequently.

[0003] However, mud and debris are tightly combined with the surrounding soil layers on the hole wall, and the drill rod of the existing pile foundation drilling device is usually designed to create a rotation and cutting effect, rather than being specifically used to clean the hole wall. The contact area and applied force of the drill rod may not provide sufficient strength to destroy and clean the material attached to the hole wall, and it is difficult to effectively remove it only by the physical contact and slight friction of the drill rod. Therefore, a pile foundation drilling device and a construction method are proposed to solve the above technical problems. Summary of the invention

[0004] The present application provides a pile foundation hole-forming device and a construction method, which has the function of scraping away dirt and debris on the hole wall during the drilling process, thereby ensuring the cleanliness of the drilled hole and greatly improving the drilling efficiency.

[0005] The present application provides a pile foundation hole forming device and construction method, which adopts the following technical solutions: A pile foundation hole forming device and construction method, wherein the pile foundation hole forming device comprises a drill rod and a support and positioning assembly for stably supporting the drill rod on the surface near the drill hole, the drill rod is provided with a columnar cavity inside, the outer surface of the drill rod is provided with a plurality of through holes interconnected with the columnar cavity, a metal scraper is provided in the through hole of the drill rod, a mounting base is provided at the bottom of the metal scraper, the mounting base is connected to the inner wall of the drill rod through hole by a rotating shaft, an electric telescopic rod is provided in the columnar cavity of the drill rod, the output end of the electric telescopic rod is connected to a connecting piece, and the plurality of metal scrapers are rotated simultaneously by the drive of the electric telescopic rod and under the action of the connecting piece.

[0006] By adopting the above technical solution, a columnar cavity is provided inside the drill rod, and the columnar cavity is connected to the external environment through a through hole, so as to provide a good fluid channel during the drilling process, help remove drill cuttings and mud in the hole, and with the help of an electric telescopic rod arranged in the columnar cavity, it is possible to drive multiple metal scrapers to rotate around the rotating shaft at the same time through the connection between its output end and the connecting piece; so that the metal scraper can scrape off the soil and debris on the hole wall during the drilling process, while ensuring the cleanliness of the borehole, greatly improving the drilling efficiency.

[0007] Preferably, a drill bit is provided at the bottom of the drill rod, and a knife slice is provided on the surface of the drill bit.

[0008] By adopting the above technical solution and providing a knife slice on the surface of the drill bit, the center of gravity distribution of the drill bit can be optimized, thereby improving the stability during the drilling process and reducing the risk of instability.

[0009] Preferably, a connecting piece for connecting to an output end of a drilling rig is provided on the top of the drill rod.

[0010] By adopting the above technical solution and providing a detachable connecting piece, the drilling rig and the drill rod can be quickly replaced and repaired at different stages.

[0011] Preferably, the drill rod is provided with a grouting pipe communicated with the columnar cavity.

[0012] By adopting the above technical solution, by connecting the grouting pipe to an external water pump and starting the water pump, a negative pressure environment is created inside the columnar cavity by the grouting pipe; this negative pressure state allows the surrounding mud to pass through the through hole into the columnar cavity under the action of gravity and pressure difference, so as to extract the mud in the columnar cavity.

[0013] Preferably, a cut surface is provided on the top of the metal scraper, and the cut surface of the metal scraper is arranged tangentially to the hole wall.

[0014] By adopting the above technical solution, the inclined cutting surface enables the metal scraper to guide the fluid flow more effectively during operation; due to the inclined design of the cutting surface, the mud can form a high-quality flow state when flowing on the cutting surface, avoiding turbulence and retention of the mud near the hole wall, thereby improving the overall fluidity.

[0015] Preferably, a plurality of cutting teeth are arranged on the cutting surface of the metal scraper, and the cutting teeth are integrally formed with the metal scraper.

[0016] By adopting the above technical solution, the cutting force of the cutting teeth on the metal scraper can be evenly distributed on the cutting surface of the metal scraper, so that the rocks and impurities in the pile hole can be effectively cut and crushed.

[0017] Preferably, the linkage includes a plurality of positioning rings, the plurality of positioning rings are fixedly connected by connecting rods, a built-in frame is formed between the plurality of positioning rings and the connecting rods, the top of the built-in frame is connected to the output end of the electric telescopic rod, the bottom of the positioning ring is connected to the middle position of the metal scraper by a linkage rod, and the linkage rod, the positioning ring and the metal scraper are all hinged.

[0018] By adopting the above technical solution, the built-in frame is moved up and down by driving the electric telescopic rod, and the linkage rod and the metal scraper are connected to each other, so that the metal scraper is rotated around the rotating shaft, thereby driving several metal scrapers to rotate simultaneously.

[0019] Preferably, the support and positioning assembly comprises a positioning sleeve, the interior of the positioning sleeve is provided with a vertical channel for the drill rod to pass through, the outer surface of the positioning sleeve is provided with a plurality of strip grooves, and the interior of the strip grooves is provided with expandable legs.

[0020] By adopting the above technical solution, when the legs are unfolded and form a triangular structure with the positioning sleeve and the ground, the triangle provides extremely high stability. According to the principle of geometry, the triangle is the most stable shape, which can effectively disperse and withstand external gravity and lateral forces; the unfolding of the legs makes the weight of the drill pipe evenly distributed on the ground, reducing the pressure on a single support point and reducing the possible risk of tilting or collapse; the contact area with the ground is increased, which can effectively improve the stability of the support.

[0021] Preferably, a rotating rod is provided inside the leg, and the rotating rod is rotatably connected to the inner wall of the positioning sleeve strip groove. A first connecting rod is rotatably provided inside the positioning sleeve strip groove, one end of the first connecting rod is hinged to the positioning sleeve, and the other end of the first connecting rod is rotatably connected to a second connecting rod, and the second connecting rod is hinged to the middle part of the leg.

[0022] By adopting the above technical solution, when the legs, the first connecting rod and the second connecting rod form a triangle, the rigidity of the entire structure is enhanced, and it can effectively resist deformation caused by external loading, so as to further enhance stability.

[0023] Preferably, the construction method of the pile foundation hole forming device comprises the following construction steps: S1: Construction preparation; The construction personnel will first clean up the construction site to ensure that there are no obstacles on the site, and conduct a comprehensive inspection of the drilling equipment to ensure that it is functioning properly and in good working condition; finally, the construction team will prepare the required building materials; S2: positioning and laying out; According to the design drawings, the construction team will conduct positioning and laying out at the construction site to ensure the accuracy of the pile position; S3: support positioning pile hole; By starting the power supply of the electric push rod, the first connecting rod and the second connecting rod are linked, and the legs are opened, and a triangular structure is formed between the unfolded legs, the positioning sleeve and the ground, and the center point of the positioning sleeve is aligned with the center hole of the pile hole; S4: hole forming; Select an appropriate drilling rig according to the type of pile foundation, and ensure that the output end of the drilling rig is aligned with the center line of the positioning sleeve; then, connect the drill rod to the output end of the drilling rig, and ensure that the bottom of the drill bit coincides with the vertical channel of the positioning sleeve; after starting the drilling rig, use it to drill a hole on the pile position; S5: slurry extraction; Connect the slurry extraction pipe on the drill pipe to an external water pump, and start the water pump to form a negative pressure environment inside the columnar cavity; the negative pressure state causes the surrounding mud to actively flow into the pile hole under the influence of gravity and pressure difference, and enter the columnar cavity through the through hole, so as to extract the mud in the columnar cavity; S6: hole cleaning; After the drilling work is completed, the bottom of the hole should be flushed with clean water or other hole cleaning liquid to remove mud and other debris; and the hole wall should be systematically inspected; S7: Install the steel cage; Make the steel cage according to the design requirements and transport it to the hole mouth; lower the steel cage into the hole through the lifting equipment to ensure the correct position; S8: pouring concrete; Prepare concrete according to the design mix ratio requirements to ensure that its strength and fluidity meet the specification standards; then, pour the concrete into the hole starting from the hole mouth; S9: Maintenance; After pouring, the concrete should be properly cured to keep it moist to prevent cracking. S10: Construction summary; After the construction is completed, record the relevant data and construction status to provide reference for subsequent projects; inspect and accept the pile foundation to ensure that it meets the design requirements.

[0024] By adopting the above technical solution, by configuring the grouting pipe, columnar cavity and through hole on the drill rod, during the grouting process, it is only necessary to connect the grouting pipe to the external water pump, without the need to go through the steps of lowering the water pumping pipe and laying the power supply. This not only saves multiple preparation links in the traditional method, but also enables faster entry into the construction state and improved work efficiency; it also simplifies the system and reduces the use of materials and equipment, thereby reducing the frequency of maintenance and replacement and related costs.

[0025] In summary, this application has the following beneficial effects: 1. The pile foundation hole-forming device, by providing a columnar cavity inside the drill rod, and the columnar cavity is connected to the external environment through a through hole, provides a good fluid channel during the drilling process, helps to remove drill cuttings and mud in the hole, and by means of an electric telescopic rod arranged in the columnar cavity, can drive multiple metal scrapers to rotate around the rotating shaft at the same time through the connection between its output end and the linkage; so that the metal scrapers can scrape off the soil and debris on the hole wall during the drilling process, while ensuring the cleanliness of the drilled hole, greatly improving the drilling efficiency.

[0026] 2. The construction method of the pile foundation drilling device, by configuring the grouting pipe, columnar cavity and through hole on the drill rod, during the grouting process, it is only necessary to connect the grouting pipe to the external water pump, without the need to go through the steps of lowering the water pumping pipe and laying the power supply. This not only saves multiple preparation links in the traditional method, but also enables faster entry into the construction state and improved work efficiency; it also simplifies the system, reduces the use of materials and equipment, thereby reducing the frequency of maintenance and replacement and related costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the overall structure of the pile foundation hole forming device in this embodiment; Figure 2 Schematic diagram of the overall structure of the drill rod in this embodiment; Figure 3 is a schematic diagram of the explosion structure between the drill rod and the connecting piece in this embodiment; Figure 4 In this embodiment Figure 3 The enlarged structural diagram at A in the middle; Figure 5 is an overall cross-sectional view of the drill pipe in this embodiment; Figure 6 Schematic diagram of the internal structure of the linkage member in this embodiment; Figure 7 This is a schematic diagram of the overall structure of the retracted metal scraper in this embodiment; Figure 8 is a schematic diagram of the internal structure of the support and positioning assembly in this embodiment; Explanation of the reference numerals: 1. drill rod; 2. support and positioning assembly; 201. positioning sleeve; 202. strip groove; 203. support leg; 204. rotating rod; 205. first connecting rod; 206. second connecting rod; 207. electric push rod; 3. drill bit; 4. knife slice; 5. connecting piece; 6. columnar cavity; 7. through hole; 8. metal scraper; 9. cutting surface; 10. cutting teeth; 11. mounting base; 12. rotating shaft; 13. electric telescopic rod; 14. connecting piece; 1401. positioning ring; 1402. connecting rod; 1403. first fixed block; 1404. second fixed block; 1405. connecting rod; 15. grouting pipe. DETAILED DESCRIPTION

[0028] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content. Example

[0029] The present invention discloses a pile foundation hole forming device and a construction method, Figure 1 As shown, the pile foundation drilling device includes a drill rod 1 and a support and positioning assembly 2 for stably supporting the drill rod 1 on the surface near the drill hole. The drill rod 1 causes a drill bit 3 to cut into the underground soil layer through rotation. The bottom of the drill rod 1 is provided with a drill bit 3, and the drill bit 3 is gradually pushed downward by a certain feed force; the surface of the drill bit 3 is provided with a spiral blade slice 4, and the purpose of designing the spiral shape is to increase the cutting efficiency and the ability to transport soil; during the rotation of the drill bit 3, the soil and other materials are cut from top to bottom and transported upward, avoiding blockage.

[0030] like Figure 2 As shown, a connector 5 for connecting to the output end of the drilling rig is provided at the top of the drill rod 1, and the connector 5 is detachably connected to the output end of the drill rod 1. The connector 5 is connected to the output end of the drill rod 1 and the output end of the drilling rig by snapping or clamping. During the construction process, the drilling rig drives the drill rod 1 by rotation and feeding, thereby realizing the drilling function. The detachable connector 5 allows for quick replacement and maintenance at different stages. For example, when the drill bit 3 is worn, the drill rod 1 can be quickly removed to replace the drill bit 3, thereby reducing downtime.

[0031] like Figure 3 As shown, a columnar cavity 6 is provided inside the drill rod 1, and a plurality of through holes 7 interconnected with the columnar cavity 6 are provided on the outer surface of the drill rod 1. The through holes 7 are arranged at equal angles around the central axis of the drill rod 1 on a horizontal plane, and the through holes 7 are distributed at equal intervals along the length direction of the drill rod 1 in the longitudinal direction. A metal scraper 8 is provided in the through holes 7 of the drill rod 1. The metal scraper 8 in the through holes 7 can keep the hole wall clean during the drilling process of the drill rod 1, remove the mud and rock cuttings deposited on the hole wall, thereby maintaining the integrity of the hole wall; in addition, the metal scraper 8 can evenly apply pressure to the hole wall, help the mud to be more evenly distributed, and enhance the supporting effect of the mud on the hole wall.

[0032] like Figure 3As shown, a grouting pipe 15 connected to the columnar cavity 6 is provided on the drill rod 1 and near the top of the drill rod 1 itself. By connecting the grouting pipe 15 to an external water pump and starting the water pump, the grouting pipe 15 creates a negative pressure environment inside the columnar cavity 6. This negative pressure state allows the surrounding mud to pass through the through hole 7 into the columnar cavity 6 under the action of gravity and pressure difference, so as to extract the mud in the columnar cavity 6.

[0033] like Figure 4 As shown, specifically, an inclined section 9 is provided on the top of the metal scraper 8, and the section 9 of the metal scraper 8 is tangent to the hole wall. The inclined section 9 enables the metal scraper 8 to guide the fluid flow more effectively during operation; due to the inclined design of the section 9, the mud can form a high-quality flow state when flowing on the section 9, avoiding turbulence and retention of the mud near the hole wall, thereby improving the overall fluidity, and the inclined section 9 can reduce the friction with the hole wall, so that the metal scraper 8 slides more smoothly during operation; this design can effectively reduce energy loss and ensure that the scraper can act on the material to be cleaned with less resistance; in addition, the design tangent to the hole wall enables the metal scraper 8 to contact the mud or sediment more evenly and smoothly during cutting, and the inclined section 9 can generate better cutting force, thereby effectively removing sediment and achieving an ideal cleaning effect.

[0034] like Figure 4 As shown, a plurality of cutting teeth 10 are arranged on the cutting surface 9 of the metal scraper 8, and the cutting teeth 10 are made of high-strength metal material. The combination of the cutting teeth 10 and the metal scraper 8 can withstand higher cutting and impact forces, thereby enhancing work efficiency; the cutting force of the cutting teeth 10 can be evenly distributed on the cutting surface 9 of the metal scraper 8, thereby effectively cutting and crushing rocks and impurities in the pile hole; the cutting teeth 10 and the metal scraper 8 are integrally formed, and the integrally formed design of the cutting teeth 10 and the metal scraper 8 ensures the structural strength and stability between the cutting teeth 10 and the blade body; this design can prevent the cutting teeth 10 from falling off or being damaged during use, thereby ensuring the reliability of the metal scraper 8.

[0035] like Figure 4As shown, a mounting base 11 is provided at the bottom of the metal scraper 8, and the mounting base 11 is connected to the inner wall of the through hole 7 of the drill pipe 1 by a rotating shaft 12. The rotating shaft 12 connection allows the metal scraper 8 to rotate freely inside the drill pipe 1; this structure enables the metal scraper 8 to be adjusted according to the direction of mud flow and the drilling angle; and the rotating shaft 12 connection enhances the flexibility of the metal scraper 8, so that it can adaptively adjust under drilling conditions of different geological densities or hardnesses, and better adapt to the shape and surface conditions of the hole wall; through the connection of the rotating shaft 12, the metal scraper 8 can self-adjust the angle when rotating, reducing the direct friction between the metal scraper 8 and the hole wall, thereby reducing wear and extending the service life of the metal scraper 8.

[0036] like Figure 5 As shown, an electric telescopic rod 13 is fixedly installed in the columnar cavity 6 of the drill rod 1 and near the top position of the drill rod 1. The output end of the electric telescopic rod 13 is connected to a connecting piece 14. Through the drive of the electric telescopic rod 13 and under the action of the connecting piece 14, a plurality of metal scrapers 8 rotate at the same time. When the plurality of metal scrapers 8 rotate at the same time, the borehole can be cut at the same time, which significantly improves the cutting efficiency and shortens the operation time.

[0037] like Figure 5 and Figure 6 As shown, specifically, the linkage 14 includes a plurality of positioning rings 1401, the positioning rings 1401 are evenly spaced along the length direction of the drill pipe 1 in the longitudinal direction, and the number of the positioning rings 1401 and the longitudinal through holes 7 are equal, the plurality of positioning rings 1401 are fixedly connected by connecting rods 1402, the plurality of positioning rings 1401 and the connecting rods 1402 form an internal frame, the top of the internal frame is connected to the output end of the electric telescopic rod 13, the bottom of the positioning ring 1401 is provided with a plurality of first fixing blocks 1403 matching the number of the horizontal through holes 7, the inner surface of the metal scraper 8 and close to the middle position thereof is provided with a second fixing block 1404, the first fixing block 1403 and the second fixing block 1404 are connected by a linkage rod 1405, the top of the linkage rod 1405 is hinged to the first fixing block 1403, and the bottom of the linkage rod 1405 is hinged to the second fixing block 1404.

[0038] like Figure 6 and Figure 7 As shown, further, the built-in frame moves up and down by driving the electric telescopic rod 13, and the connecting rod 1405 and the metal scraper 8 are connected, so that the metal scraper 8 rotates around the rotating shaft 12, thereby driving several metal scrapers 8 to rotate at the same time; through the fixed structure of multiple positioning rings 1401 and connecting rods 1402, the stability of the entire device is improved, and it can withstand a larger operating load and reduce the failure rate.

[0039] like Figure 8 As shown, the support and positioning assembly 2 includes a positioning sleeve 201, the interior of which is provided with a vertical channel for the drill pipe 1 to pass through, the outer surface of the positioning sleeve 201 is provided with a plurality of strip grooves 202 at equal angles around the central axis of the positioning sleeve 201 itself, and the interior of the strip groove 202 is provided with expandable legs 203. When the legs 203 are opened, the legs 203, the positioning sleeve 201 and the ground form a stable triangular structure. like Figure 8 As shown, when the legs 203 are unfolded and form a triangular structure with the positioning sleeve 201 and the ground, the triangle provides extremely high stability; according to the principle of geometry, the triangle is the most stable shape, which can effectively disperse and withstand external gravity and lateral forces; the unfolding of the legs 203 makes the weight of the drill pipe 1 evenly distributed on the ground, reduces the pressure on a single support point, and reduces the possible risk of tilting or collapse; the contact area with the ground is increased, which can effectively improve the stability of the support.

[0040] like Figure 8 As shown, specifically, a rotating rod 204 is provided inside the leg 203 and near the top thereof, and the rotating rod 204 is rotatably connected to the inner wall of the strip groove 202 of the positioning sleeve 201, and a first connecting rod 205 is rotatably provided inside the strip groove 202 of the positioning sleeve 201, and one end of the first connecting rod 205 is hingedly arranged with the positioning sleeve 201, and the other end of the first connecting rod 205 is rotatably connected with a second connecting rod 206, and the second connecting rod 206 is hingedly arranged with the middle part of the leg 203, and when the first connecting rod 205 is rotated to be in the same straight line with the second connecting rod 206, the first connecting rod 205, the second connecting rod 206, and the leg 203 A triangular structure is formed between the support leg 203 and the positioning sleeve 201, and the formed triangular structure enables the force applied to the support leg 203 to be evenly distributed to the three connection points, thereby increasing the stability of the support leg 203; a triangle is a geometric shape with good load-bearing capacity; when the support leg 203, the first connecting rod 205 and the second connecting rod 206 form a triangle, the rigidity of the entire structure is enhanced, and it can effectively resist deformation caused by external loading; during operation, the rotating rod 204 allows the first connecting rod 205 and the second connecting rod 206 to rotate freely within a certain range, so that real-time adjustments can be made according to the applied load to maintain the balance of the support leg 203.

[0041] like Figure 8As shown, an electric push rod 207 is rotatably provided in the strip groove 202 of the positioning sleeve 201, and the output end of the electric push rod 207 is connected to the upper surface of the second connecting rod 206 and close to its own center position. The electric push rod 207 acts as a linear actuator and can change its length through power supply; when the electric push rod 207 extends outward or retracts, it will push the connected second connecting rod 206 to perform corresponding movement; due to the hinged connection between the second connecting rod 206 and the middle part of the leg 203 and the first connecting rod 205, the movement of the electric push rod 207 will cause these connecting rods to rotate relative to each other; when the electric push rod 207 is retracted, the leg 203 is folded through the movement of these connecting rods; when the electric push rod 207 is extended, the leg 203 is unfolded. This folding design allows the device to be more adaptable to different working environments and conditions, and can be quickly adjusted to a suitable working state; and the leg 203 can be retracted to a smaller volume when not in use, reducing the space required for storage and transportation, and is suitable for mobile equipment or temporary facilities.

[0042] The construction method of the pile foundation hole forming device comprises the following construction steps: S1: Construction preparation; The construction workers first need to clean up the construction site to ensure that there are no obstacles on the site to restore the safety and cleanliness of the working space; then, they need to conduct a comprehensive inspection of the drilling equipment to ensure that it functions normally and is in good working condition; finally, the construction team will prepare the required building materials, including cement and steel bars, to ensure the smooth progress of the construction; S2: positioning and laying out; According to the design drawings, the construction team will conduct positioning and laying out at the construction site to ensure the accuracy of the pile position; for this purpose, the theodolite or other positioning instruments will be used for precise measurement and laying out to accurately determine the location of the pile hole; S3: support positioning pile hole; By starting the power supply of the electric push rod 207, the first connecting rod 205 and the second connecting rod 206 are linked, and the supporting legs 203 are opened, and a triangular structure is formed between the unfolded supporting legs 203, the positioning sleeve 201 and the ground, and the center point of the positioning sleeve 201 is aligned with the center hole of the pile hole; S4: hole forming; According to the type of pile foundation, select an appropriate drilling rig and ensure that the output end of the drilling rig is aligned with the center line of the positioning sleeve 201; then, connect the drill rod 1 to the output end of the drilling rig, and at this time, ensure that the bottom of the drill bit 3 coincides with the vertical channel of the positioning sleeve 201; after starting the drilling rig, control the drilling speed to ensure that the diameter and depth of the drill hole meet the design requirements, thereby ensuring the construction quality; S5: slurry extraction; The slurry extraction pipe 15 on the drill pipe 1 is connected to an external water pump, and a negative pressure environment is formed inside the columnar cavity 6 by starting the water pump. The negative pressure state causes the surrounding mud to actively flow into the pile hole under the influence of gravity and pressure difference, and enter the columnar cavity 6 through the through hole 7. This process is intended to effectively extract the mud in the columnar cavity 6 to ensure the smooth progress of the drilling operation. S6: hole cleaning; After the drilling work is completed, the bottom of the hole should be flushed with clean water or other hole cleaning liquid to remove mud and other debris; then, the hole wall should be systematically inspected to ensure its integrity and confirm that there is no landslide or other potential problems, so as to ensure the safety and effectiveness of subsequent construction; S7: Install the steel cage; Make the steel cage according to the design requirements and transport it to the hole mouth; lower the steel cage into the hole by hoisting equipment or manually to ensure the correct position; S8: pouring concrete; Prepare concrete according to the design mix ratio requirements to ensure that its strength and fluidity meet the standard; then, pour concrete into the hole from the hole mouth, using a continuous pouring method to avoid stratification of the concrete; during the pouring process, the aggregation of the concrete needs to be monitored in real time to ensure that no voids are generated, thereby ensuring the quality of the project; S9: Maintenance; After pouring, the concrete should be properly cured to keep it moist and prevent cracking. During the prescribed curing period, the strength of the concrete needs to be monitored regularly to ensure that it meets the design requirements, thereby ensuring the overall quality and durability of the project. S10: Construction summary; After the construction is completed, record the relevant data and construction status to provide reference for subsequent projects; inspect and accept the pile foundation to ensure that it meets the design requirements.

[0043] Working principle: When in use, the construction personnel first move the drilling rig and other equipment to the designed position of the pile position, and use the lifting equipment to lift the supporting positioning component 2, and start the power of the electric push rod 207, so that the first connecting rod 205 and the second connecting rod 206 are linked, and the supporting legs 203 are opened, and the supporting positioning component 2 is supported below. The unfolded supporting legs 203 are in contact with the ground and form a stable triangular structure, and the center point of the positioning sleeve 201 is adjusted to align with the center hole of the pile hole.

[0044] Then connect the connector 5 on the top of the drill rod 1 to the output end of the drilling rig, and then ensure that the output end of the drilling rig is aligned with the center line position of the positioning sleeve 201; then, connect the drill rod 1 to the output end of the drilling rig, and at this time, ensure that the bottom of the drill bit 3 coincides with the vertical channel of the positioning sleeve 201; after starting the drilling rig, control the rotation of the drill rod 1 to achieve drilling at the designed pile position.

[0045] During the process of the drill rod 1 rotating to form a hole, the electric telescopic rod 13 drives and the connecting piece 14 to make several metal scrapers 8 rotate and turn outward at the same time. At this time, the columnar cavity 6 is connected with the external environment through the through hole 7, and the cut surface 9 of the metal scraper 8 is in contact with the hole wall, so that the metal scraper 8 can scrape off the soil and debris on the hole wall during the drilling process. The soil and debris on the hole wall will pass through the through hole 7 into the interior of the columnar cavity 6. After the pile hole is formed, the drill rod 1 is removed and the soil and debris in the columnar cavity 6 of the drill rod 1 are cleared by using high-pressure flushing equipment.

[0046] After the drill rod 1 is rotated to form a hole, the power supply of the drilling rig is turned off, and the slurry extraction pipe 15 on the drill rod 1 is connected to an external water pump. By starting the water pump, a negative pressure environment is formed inside the columnar cavity 6; this negative pressure state prompts the surrounding mud to actively flow into the pile hole under the influence of gravity and pressure difference, and enter the columnar cavity 6 through the through hole 7; this process is intended to effectively extract the mud in the columnar cavity 6 to ensure the smooth progress of the drilling operation.

[0047] During the slurry extraction process, the impurities in the columnar cavity 6 filter the slurry, which can effectively prevent larger particles from entering the borehole, thereby reducing the risk of blockage; it helps to maintain the continuity and efficiency of the drilling operation and avoid shutdowns and repairs due to blockage.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pile foundation drilling device, comprising a drill rod (1) and a support and positioning assembly (2) for stably supporting the drill rod (1) on the ground surface near the drill hole, Features: The drill rod (1) is provided with a columnar cavity (6) inside, and the outer surface of the drill rod (1) is provided with a plurality of through holes (7) which are interconnected with the columnar cavity (6). A metal scraper (8) is provided in the through hole (7) of the drill rod (1), and a mounting base (11) is provided at the bottom of the metal scraper (8). The mounting base (11) is connected to the inner wall of the through hole (7) of the drill rod (1) via a rotating shaft (12). An electric telescopic rod (13) is provided in the columnar cavity (6) of the drill rod (1), and the output end of the electric telescopic rod (13) is connected to a linking member (14). The electric telescopic rod (13) is driven and, under the action of the linking member (14), the plurality of metal scrapers (8) rotate simultaneously.

2. The pile foundation drilling device according to claim 1, Features: A drill bit (3) is provided at the bottom of the drill rod (1), and a knife slice (4) is provided on the surface of the drill bit (3).

3. The pile foundation drilling device according to claim 1, Features: A connecting piece (5) for connecting to an output end of a drilling rig is provided on the top of the drill rod (1).

4. The pile foundation drilling device according to claim 1, Features: The drill rod (1) is provided with a grouting pipe (15) which is in communication with the columnar cavity (6).

5. The pile foundation drilling device according to claim 1, Features: A cutting surface (9) is provided on the top of the metal scraper (8), and the cutting surface (9) of the metal scraper (8) is arranged tangentially to the hole wall.

6. The pile foundation drilling device according to claim 5, Features: A plurality of cutting teeth (10) are provided on the cutting surface (9) of the metal scraper (8), and the cutting teeth (10) and the metal scraper (8) are integrally formed.

7. The pile foundation drilling device according to claim 1, Features: The linkage (14) comprises a plurality of positioning rings (1401), the plurality of positioning rings (1401) being fixedly connected to each other via a connecting rod (1402), the plurality of positioning rings (1401) and the connecting rod (1402) forming a built-in frame, the top of the built-in frame being connected to the output end of the electric telescopic rod (13), the bottom of the positioning ring (1401) being connected to the middle position of the metal scraper (8) via a linkage (1405), and the linkage (1405) being hinged to the positioning ring (1401) and the metal scraper (8).

8. The pile foundation drilling device according to claim 1, Features: The support positioning assembly (2) comprises a positioning sleeve (201), the interior of the positioning sleeve (201) being provided with a vertical channel for the drill rod (1) to pass through, the outer surface of the positioning sleeve (201) being provided with a plurality of strip grooves (202), and the interior of the strip grooves (202) being provided with expandable legs (203).

9. The pile foundation drilling device according to claim 8, Features: A rotating rod (204) is provided inside the supporting leg (203), and the rotating rod (204) is rotatably connected to the inner wall of the strip groove (202) of the positioning sleeve (201). A first connecting rod (205) is rotatably provided inside the strip groove (202) of the positioning sleeve (201), and one end of the first connecting rod (205) is hingedly arranged with the positioning sleeve (201), and the other end of the first connecting rod (205) is rotatably connected with a second connecting rod (206), and the second connecting rod (206) is hingedly arranged with the middle part of the supporting leg (203).

10. A construction method of the pile foundation hole-forming device according to any one of claims 1 to 9, Features: The construction steps include: S1: Construction preparation; The construction personnel will first clean up the construction site to ensure that there are no obstacles on the site, and conduct a comprehensive inspection of the drilling equipment to ensure that it is functioning properly and in good working condition; finally, the construction team will prepare the required building materials; S2: positioning and laying out; According to the design drawings, the construction team will conduct positioning and laying out at the construction site to ensure the accuracy of the pile position; S3: support positioning pile hole; By starting the power supply of the electric push rod (207), the first connecting rod (205) and the second connecting rod (206) are linked to each other, and the supporting legs (203) are opened, so that a triangular structure is formed between the unfolded supporting legs (203), the positioning sleeve (201) and the ground, and the center point of the positioning sleeve (201) is aligned with the center hole of the pile hole; S4: hole forming; According to the type of pile foundation, a suitable drilling rig is selected and the output end of the drilling rig is aligned with the center line of the positioning sleeve (201); then, the drill rod (1) is connected to the output end of the drilling rig, and at this time, it should be ensured that the bottom of the drill bit (3) coincides with the vertical channel of the positioning sleeve (201); after starting the drilling rig, it is used to drill a hole at the pile position; S5: slurry extraction; The slurry extraction pipe (15) on the drill rod (1) is connected to an external water pump, and a negative pressure environment is formed inside the columnar cavity (6) by starting the water pump; the negative pressure state causes the surrounding mud to actively flow into the pile hole under the influence of gravity and pressure difference, and enter the columnar cavity (6) through the through hole (7), so as to extract the mud in the columnar cavity (6); S6: hole cleaning; After the drilling work is completed, the bottom of the hole should be flushed with clean water or other hole cleaning liquid to remove mud and other debris; and the hole wall should be systematically inspected; S7: Install the steel cage; Make the steel cage according to the design requirements and transport it to the hole mouth; lower the steel cage into the hole through the lifting equipment to ensure the correct position; S8: pouring concrete; Prepare concrete according to the design mix ratio requirements to ensure that its strength and fluidity meet the specification standards; then, pour the concrete into the hole starting from the hole mouth; S9: Maintenance; After pouring, the concrete should be properly cured to keep it moist to prevent cracking. S10: Construction summary; After the construction is completed, record the relevant data and construction status to provide reference for subsequent projects; inspect and accept the pile foundation to ensure that it meets the design requirements.

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