A drilling device for foundation construction

Abstract

The application discloses a drilling device for foundation construction and relates to the technical field of drilling.The drilling device comprises a drill bit mounting piece, a sheet pile connecting piece is mounted on the drill bit mounting piece, and the sheet pile connecting piece is used for preventing drilling deviation; a limiting control piece is sleeved on the drill bit mounting piece; the limiting control piece is used for increasing drilling stability; two stop protection pieces are mounted on the drill bit mounting piece; and the two stop protection pieces are used for stopping the limiting control piece; the sheet pile connecting piece is matched with the drill bit mounting piece, can be used for guiding work by using the already-mounted steel sheet pile during drilling work, can improve the precision of the structure during drilling, and can avoid drilling deviation of the drill bit main body caused by stones and other factors during drilling of the drill bit main body; and the problems that the current drilling device for foundation construction is inconvenient to adapt to the already-mounted steel sheet pile for guidance and is inconvenient to automatically control drilling stability are solved.

Description

Technical Field

[0001] This invention relates to the field of drilling technology, specifically to a drilling device for foundation construction. Background Technology

[0002] In actual foundation construction, sheet pile cofferdam foundations are a common type of foundation construction. To ensure smooth insertion of sheet piles, pilot holes are usually drilled on the ground to guide them. To ensure drilling efficiency, long auger drill bits are typically used. However, current foundation drilling equipment is prone to pilot hole deviation due to drill rod deformation and underground rock pressure when drilling to greater depths. This can also cause wear on the sheet piles, making it difficult to adapt to already installed sheet piles for guidance. Furthermore, it affects the accuracy of sheet pile corners, impacting the quality of the sheet pile cofferdam. It also hinders automatic control to increase drilling stability, as longer drill bits have poor drilling stability and can easily lead to increased hole diameter. Manually installing stabilizing structures is time-consuming and labor-intensive, and it is also inconvenient to quickly test the straightness of the drill bit externally, making self-inspection inflexible.

[0003] Therefore, we propose a drilling device for foundation construction. Summary of the Invention

[0004] The purpose of this invention is to provide a drilling device for foundation construction, in order to solve the problems mentioned in the background art that current drilling devices for foundation construction are not convenient to adapt to already installed steel sheet piles for guidance, nor are they convenient to automatically control and increase drilling stability.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a drilling device for foundation construction, comprising a drill bit mounting component, on which a sheet pile connector is mounted, the sheet pile connector being used to prevent drilling deviation; a limit control component is sleeved on the drill bit mounting component; the limit control component is used to increase drilling stability; two stop protection components are mounted on the drill bit mounting component; the two stop protection components are used to stop the limit control component; a straightness test component is mounted on the drill bit mounting component; an anti-threading component is mounted on the drill bit mounting component; the anti-threading component is used to prevent the pin from loosening; the drill bit mounting component includes: a drill bit body, a rotary connecting column, and a flat adapter column; the rotary connecting column is fixedly mounted on the top of the drill bit body; the rotary connecting column is provided with a rotary groove; the end of the drill bit body is provided with two rows of drill teeth; two flat adapter columns are fixedly mounted on the rotary connecting column, and the two flat adapter columns are used to fit against the ground.

[0006] Preferably, the drill bit mounting component further includes: a drill string connecting cylinder, a drill bit ring, and connecting rods. The drill string connecting cylinder is fixedly installed on the top of the rotary connecting column, and the drill string connecting cylinder has two through holes. Two connecting rods are fixedly installed on the inner side of the drill bit ring, and the two connecting rods are respectively fixedly installed on the drill bit body. The drill bit ring is fixedly installed at the bottom of the rotary connecting column. Drill teeth are respectively provided at the bottom of the drill bit ring and the connecting rods.

[0007] Preferably, the sheet pile connector includes: a sheet pile ring, a rotating block, and a limiting groove. The sheet pile ring is rotatably sleeved on the drill bit ring. The rotating block is rotatably mounted on the sheet pile ring. The rotating block is used to rotate and adjust the drilling position. The rotating block has a limiting groove, which is used to cooperate with the buckle of the sheet pile. The limiting groove is used to slide up and down on adjacent sheet piles. The rotating block protrudes from the side of the drill bit body.

[0008] Preferably, the sheet pile connector further includes: positioning bolts; threaded holes are provided on both sides of the rotating block; positioning bolts are threadedly connected to the two threaded holes on the rotating block, and the ends of the two positioning bolts are arc-shaped structures, and the ends of the two positioning bolts are pressed and fitted against the outer side of the sheet pile ring; the tails of the two positioning bolts are respectively provided with hexagonal holes.

[0009] Preferably, the limiting control component includes: a stabilizing sleeve, an extension arm, a positioning rod, and a detection disc. The stabilizing sleeve is sleeved on the drill bit body. The inner edge of the bottom of the stabilizing sleeve has a beveled structure. Two extension arms are fixedly installed on the outer side of the stabilizing sleeve, and positioning rods are fixedly installed on each of the two extension arms. The bottoms of the two positioning rods are tapered structures. The positioning rods are used to insert into the ground. A detection disc is slidably sleeved on the front positioning rod. A spring is fixedly installed on the top of the detection disc, and the end of the spring on the top of the detection disc is connected to the bottom of the extension arm on the same side. The spring on the top of the detection disc is sleeved on the positioning rod on the same side.

[0010] Preferably, the limit control component further includes: a position switch, which is fixedly installed at the bottom of the extension arm on the same side as the detection plate; the position switch is used to detect ground contact.

[0011] Preferably, the stop protection component includes: a stop mounting shell, an iron block, a positioning spring, a positioning post, and an electromagnet. The stop mounting shell is fixedly installed at the bottom of the drill bit body; an iron block is fixedly installed inside the stop mounting shell; a positioning spring is sleeved inside the stop mounting shell; a positioning post is slidably inserted into the stop mounting shell, and an electromagnet is fixedly installed at the tail of the positioning post, with the electromagnet aligned with the iron block; the positioning spring is connected between the iron block and the positioning post; the end of the positioning post is chamfered; the positioning post is used to stop and stabilize the top of the sleeve; and the electromagnet is electrically connected to a position switch.

[0012] Preferably, the straightness test piece includes: a winding reel and a test rope, wherein the winding reel is rotatably sleeved on a rotary connecting column; the winding reel is provided with an annular groove; the test rope is fixedly installed on the winding reel; and the winding reel is used to wind and wrap the test rope.

[0013] Preferably, the anti-reverse thread component includes: a protective insert plate and a spring piece, wherein the protective insert plate is slidably inserted into the rotary connecting column; the protective insert plate is used to block two through holes on the drill string connecting cylinder; a spring piece is fixedly installed at the bottom of the protective insert plate, and the spring piece is located inside the rotary connecting column.

[0014] Preferably, the anti-loosening component further includes: a stop plate, wherein the stop plate is fixedly installed inside the rotary connecting column, and the end of the spring piece is fixedly installed on the stop plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This invention uses sheet pile connectors in conjunction with drill bit mounting components to guide drilling operations using pre-installed steel sheet piles. This improves the drilling accuracy of the structure and prevents the drill bit from shifting due to rocks or other factors during drilling. The structure is simple and compact, ensuring drilling quality. Furthermore, the structure utilizes a rotatable and adjustable block, allowing for better adaptation to steel sheet turning without affecting the accuracy and quality at the turning points, thus enhancing its adaptability.

[0017] The use of stop and protection components can be used to control and stabilize the drilling process, ensuring the stability of the drill bit body above ground during drilling. This prevents the drill bit body from shaking and causing excessive hole diameter or excessive friction between the drill bit body and adjacent sheet piles. This structure can be inserted into the ground for stable operation. The limit control components can automatically control the release of the positioning column limit, eliminating the need for manual installation of the positioning rod and avoiding the time and effort of manual installation. It can be fully operated by the drilling rig operator, improving the structural rationality, allowing for reuse, increasing efficiency, and promoting the accuracy and quality of the sheet pile splicing.

[0018] Using straightness test pieces allows workers to quickly check the straightness of the drill bit body. The operation is simple and flexible, making it easier and more direct to conduct self-inspection outdoors. Using anti-reverse pins can more directly ensure the stable installation of the pins passing through the drill string connecting sleeve and prevent the pins from falling off. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a drilling device for basic construction according to the present invention;

[0020] Figure 2 This is a schematic diagram showing the position of the detection rope in this invention;

[0021] Figure 3 This is a cross-sectional view of the internal structure of a drilling device for basic construction according to the present invention.

[0022] Figure 4 This is a schematic diagram of the drill bit mounting component of the present invention;

[0023] Figure 5 For the present invention Figure 4 Enlarged view of the structure of region B in the middle;

[0024] Figure 6 This is a schematic diagram of the rotating block structure of the present invention;

[0025] Figure 7 This is a schematic diagram of the limiting control component of the present invention;

[0026] Figure 8 For the present invention Figure 2 Enlarged view of the structure of region C in the middle;

[0027] Figure 9 For the present invention Figure 3 Enlarged view of the structure of region D in the middle;

[0028] Figure 10 This is a schematic diagram showing the installation position of the stop mounting shell of the present invention;

[0029] Figure 11 This is a schematic diagram of the anti-thread retraction component structure of the present invention;

[0030] Figure 12 This is a schematic diagram of the sheet pile ring structure of the present invention.

[0031] In the diagram: 1. Drill bit mounting component; 101. Drill bit body; 102. Rotary connecting column; 1021. Flat adapter column; 103. Drill string connecting cylinder; 104. Drill bit ring; 1041. Connecting rod; 2. Sheet pile connecting component; 201. Sheet pile ring; 202. Rotating block; 2021. Limiting groove; 203. Positioning bolt; 3. Limiting control component; 301. Stabilizing sleeve; 3011. Extension arm; 302. Positioning rod; 303. Detection disc; 304. Positioning switch; 4. Stop protection component; 401. Stop mounting shell; 402. Iron block; 403. Spring; 404. Positioning column; 405. Electromagnet; 5. Linearity test component; 501. Rewinding reel; 502. Detection rope; 6. Anti-reverse thread component; 601. Protective insert plate; 602. Spring; 603. Stop plate. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1: Please refer to Figures 1 to 12 As shown:

[0034] This invention provides a technical solution: a drilling device for foundation construction, including a drill bit mounting component 1, a sheet pile connector 2 mounted on the drill bit mounting component 1, the sheet pile connector 2 being used to prevent drilling deviation; a limit control component 3 sleeved on the drill bit mounting component 1; the limit control component 3 being used to increase drilling stability; two stop protection components 4 mounted on the drill bit mounting component 1; the two stop protection components 4 being used to stop the limit control component 3; a straightness test component 5 mounted on the drill bit mounting component 1; and a straightness test component 5 mounted on the drill bit mounting component 1. An anti-retraction pin 6 is installed; the anti-retraction pin 6 is used to prevent the pin from loosening; the drill bit mounting component 1 includes: a drill bit body 101, a rotary connecting pin 102 and a flat adapter pin 1021, the rotary connecting pin 102 is fixedly installed on the top of the drill bit body 101; the rotary connecting pin 102 is provided with a rotary groove; the end of the drill bit body 101 is provided with two rows of drill teeth; two flat adapter pins 1021 are fixedly installed on the rotary connecting pin 102, and the two flat adapter pins 1021 are used to fit against the ground.

[0035] The drill bit mounting component 1 further includes: a drill string connecting sleeve 103, a drill bit ring 104, and connecting rods 1041. The drill string connecting sleeve 103 is fixedly installed on the top of the rotary connecting column 102, and the drill string connecting sleeve 103 has two through holes. Two connecting rods 1041 are fixedly installed on the inner side of the drill bit ring 104, and the two connecting rods 1041 are respectively fixedly installed on the drill bit body 101. The drill bit ring 104 is fixedly installed on the bottom of the rotary connecting column 102. Drill teeth are respectively provided at the bottom of the drill bit ring 104 and the connecting rods 1041. The sheet pile connecting component 2 includes: a sheet pile ring 201, a rotating block 202, and a limiting groove 2021. The sheet pile ring 201 is rotatably sleeved on the drill bit ring 104. The sheet pile ring 201 is rotatably mounted on the drill bit ring 104. The sheet pile connector 2 is equipped with a rotating block 202; the rotating block 202 is used to rotate and adjust the drilling position; the rotating block 202 has a limiting groove 2021, which is used to cooperate with the buckle of the sheet pile; the limiting groove 2021 is used to slide up and down on the adjacent sheet pile; the rotating block 202 protrudes from the side of the drill bit body 101; the sheet pile connector 2 also includes: positioning bolts 203, and threaded holes are provided on both sides of the rotating block 202; the two threaded holes on the rotating block 202 are respectively threaded with positioning bolts 203, and the ends of the two positioning bolts 203 are respectively arc-shaped, and the ends of the two positioning bolts 203 are respectively pressed and fitted against the outside of the sheet pile ring 201; the tails of the two positioning bolts 203 are respectively hexagonal. The sheet pile connector 2, used in conjunction with the drill bit mounting component 1, allows for guidance during drilling operations using pre-installed steel sheet piles. This improves drilling accuracy and prevents deviation of the drill bit body 101 due to rocks or other factors during drilling. The structure is simple and compact, ensuring drilling quality. Furthermore, the adjustable rotating block 202 allows for better adaptation to steel sheet pile cornering without affecting accuracy at corner points. The sheet pile connector 2 and drill bit mounting component 1 offer simple and convenient operation, making it suitable for small-diameter deep hole drilling and ensuring the quality of steel sheet pile construction. The drill bit body is driven by the drilling rig. 101 moves downward and rotates for drilling. The sheet pile ring 201 rotates and adapts on the drill bit ring 104. At the same time, as the drill bit ring 104 rotates, the drill teeth at the bottom of the drill bit ring 104 can assist in drilling. The drilling range of the drill bit ring 104 is close to the adjacent steel sheet piles and does not affect the downward movement of the rotating block 202. The rotating block 202 always slides on the side of the installed steel sheet pile and is guided by the buckle. As needed, the angle of the rotating block 202 can be adjusted by inserting two positioning bolts 203 with a hex wrench and rotating them to increase adaptability. When the drill bit body 101 is removed from the drilling machine and placed on the ground, it can be attached to the ground by two flat adapter columns 1021 to prevent the drill bit body 101 from rolling at will and improve stability.

[0036] The limiting control component 3 includes: a stabilizing sleeve 301, an extension arm 3011, a positioning rod 302, and a detection disc 303. The stabilizing sleeve 301 is sleeved on the drill bit body 101. The inner edge of the bottom of the stabilizing sleeve 301 has a beveled structure. Two extension arms 3011 are fixedly installed on the outer side of the stabilizing sleeve 301, and positioning rods 302 are fixedly installed on each of the two extension arms 3011. The bottom of the two positioning rods 302 is tapered. The positioning rods 302 are used to insert into the ground. The detection disc 303 is slidably sleeved on the front positioning rod 302. A spring is fixedly installed on the top of the detection disc 303, and the spring end on the top of the detection disc 303 is connected to the bottom of the extension arm 3011 on the same side. The spring on the top of the detection disc 303 is sleeved on the bottom of the extension arm 3011 on the same side. The limit control component 3 also includes: a stop switch 304, which is fixedly installed at the bottom of the extension arm 3011 on the same side as the detection plate 303; the stop switch 304 is used to detect ground contact; the stop protection component 4 includes: a stop mounting shell 401, an iron block 402, a positioning spring 403, a positioning post 404, and an electromagnet 405. The stop mounting shell 401 is fixedly installed at the bottom of the drill bit body 101; the iron block 402 is fixedly installed inside the stop mounting shell 401; the positioning spring 403 is sleeved inside the stop mounting shell 401; the positioning post 404 is slidably inserted into the stop mounting shell 401, and an electromagnet 405 is fixedly installed at the tail of the positioning post 404, with the electromagnet 405 aligned with the iron block 402; the positioning spring 403... Connecting between the iron block 402 and the positioning post 404; the end of the positioning post 404 is chamfered; the positioning post 404 is used to stop and stabilize the top of the sleeve 301; the electromagnet 405 is electrically connected to the position switch 304. The stop protection component 4 can be used to control stable operation, ensuring the stability of the drill bit body 101 above the ground during drilling, avoiding shaking, and preventing the problem of excessive hole diameter caused by the shaking of the drill bit body 101, as well as excessive friction of the side of the drill bit body 101 against adjacent sheet piles. This structure can be inserted into the ground for stable operation, ensuring that the bottom of the drill bit body 101 is guided by the rotating block 202 to ensure accuracy and stability during drilling, while the upper part of the drill bit body 101 can be more stable. At the same time, this structure... The limit control component 3 can automatically control the release of the positioning column 404, eliminating the need for manual installation of the positioning rod 302 and avoiding the time and effort of manual installation. It can be operated entirely by the drilling rig operator, improving the structural rationality, allowing for reuse, increasing efficiency, and promoting the accuracy and quality of the steel sheet pile splicing. As the drilling rig drives the positioning rod 302 deeper into the ground, the ground will stop the detection plate 303, which will move upward and press the positioning switch 304. At this time, the electromagnet 405 is activated by the electromagnetic attractor block 402, and the positioning column 404 can retract. The positioning spring 403 is compressed, and the positioning column 404 no longer stops the stabilizing sleeve 301. Subsequently, under the stabilizing effect of the stabilizing sleeve 301, the drilling of the drill bit body 101 is more stable.

[0037] In Example 2, based on Example 1, the straightness test piece 5 includes: a winding reel 501 and a test rope 502. The winding reel 501 is rotatably sleeved on the rotary connecting post 102. The winding reel 501 has an annular groove. The test rope 502 is fixedly installed on the winding reel 501. The winding reel 501 is used to wind and wrap the test rope 502. The anti-loosening component 6 includes: a protective insert plate 601 and a spring piece 602. The protective insert plate 601 is slidably inserted into the rotary connecting post 102. The protective insert plate 601 is used to block two through holes on the drill string connecting cylinder 103. The spring piece 602 is fixedly installed at the bottom of the protective insert plate 601 and is located inside the rotary connecting post 102. The anti-loosening component 6 also includes: a stop plate 603. The stop plate 603 is fixedly installed inside the rotary connecting post 102, and the end of the spring piece 602 is fixedly installed. Mounted on the stop plate 603, the straightness test piece 5 allows workers to quickly check the straightness of the drill bit body 101. The operation is simple and flexible, enabling more direct and straightforward self-inspection outdoors. This ensures that drilling proceeds only when the straightness of the drill bit body 101 meets the standards. Simultaneously, the test rope 502 can be quickly wound and bundled onto the winding reel 501 for storage. The anti-threading component 6 ensures the stable installation of the pins passing through the drill string connecting cylinder 103, preventing pin detachment. It also prevents threaded pins from falling off. The structure is simple and reasonable. Manually pulling the end of the test rope 502 and tightening it allows observation of the consistency of the distance between the test rope 502 and the spiral blades on the outer side of the drill bit body 101. Any local protrusion or indentation indicates that the drill bit body 101 is bent.

[0038] The working principle of this embodiment is as follows: First, the drill string is inserted into the drill string connecting sleeve 103. A pin passes through the drill string connecting sleeve 103 and the drill string. When the pin passes through the drill string connecting sleeve 103 and the drill string, the protective insert plate 601 is pressed down. After the pin is installed, the protective insert plate 601 is released and can be elastically pushed back to its original position by the spring plate 602. The protective insert plate 601 blocks the pin. During drilling, the first sheet pile can be drilled through the drill bit body 101 before being inserted into the ground. Then, the limiting groove 2021 is inserted into the side buckle of the previous sheet pile. At this time, with the limiting of the sheet pile buckle, the hole can be opened. The drilling rig drives the drill bit body 101 to move downwards and rotate for drilling. The sheet pile ring 201 rotates and adapts on the drill bit ring 104. Simultaneously, as the drill bit ring 104 rotates, the drill teeth at the bottom of the drill bit ring 104 assist in drilling. The drilling range of the drill bit ring 104 is close to the adjacent sheet piles and does not affect the downward movement of the rotating block 202. The rotating block 202 always slides on the side of the installed sheet pile for locking and guidance. As needed, two positioning bolts 203 can be inserted and rotated using a hex wrench to press and fit against the outside of the sheet pile ring 201. Adjusting the angle of the rotating block 202 can increase adaptability. Before the downward rotary drilling begins, because the rotating block 202 will stop the stabilizing sleeve 301, the stabilizing sleeve 301 will not fall off. First, rotate the drill bit body 101 to drive the stabilizing sleeve 301 to rotate, controlling the positioning rod 302 to be positioned on both sides of the steel sheet pile. At this time, the drill bit body 101 can be normally controlled to move downwards for drilling. During the process, the positioning rod 302 will insert into the ground. As the positioning rod 302 gradually penetrates deeper, the ground will stop the detection disc 303, causing the detection disc 303 to move upwards and press the positioning switch 304. At this time, the electromagnet 405 is activated by the electromagnetic attractor block 402, and the positioning column 404 can retract, compressing the positioning spring 403. 04. The stabilizing sleeve 301 will no longer stop the drilling. With the stabilizing sleeve 301 providing stability, the drill bit body 101 drills more stably. As drilling is completed and the drill bit body 101 is pulled out, the stabilizing sleeve 301, under its own weight, can move down to the bottom of the drill bit body 101. During this process, the inclined surface at the bottom of the stabilizing sleeve 301 can compress the positioning post 404, causing it to elastically retract and preventing jamming. The entire process can be operated by the drilling rig operator. When it is necessary to test the straightness of the drill bit body 101 later, the testing rope 502 can be removed. The end of the testing rope 502 can be manually pulled to tighten it, as shown in the attached figure. Figure 2 As shown, observe the consistency of the distance between the detection rope 502 and the spiral blades on the outside of the drill bit body 101 at various positions. If there is a local protrusion or depression, it indicates that the drill bit body 101 is bent. The inspection position can be adjusted by rotating the take-up reel 501 so that the detection rope 502 can inspect multiple positions of the drill bit body 101. It is simple and direct. After the inspection is completed, the detection rope 502 can be rewound onto the take-up reel 501 and tightened.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drilling device for foundation construction, comprising a drill bit mounting component (1), wherein a sheet pile connector (2) is mounted on the drill bit mounting component (1), characterized in that: The sheet pile connector (2) is used to prevent borehole deviation; a limit control component (3) is sleeved on the drill bit mounting component (1); the limit control component (3) is used to increase borehole stability; Two stop protection components (4) are installed on the drill bit mounting component (1); the two stop protection components (4) are used for the stop limit control component (3); A straightness test piece (5) is installed on the drill bit mounting component (1); an anti-thread stripping component (6) is installed on the drill bit mounting component (1); the anti-thread stripping component (6) is used to prevent the pin from loosening; The drill bit mounting component (1) includes: a drill bit body (101), a rotary connecting column (102), and a flat adapter column (1021). The rotary connecting column (102) is fixedly installed on the top of the drill bit body (101). The rotary connecting column (102) is provided with a rotary groove. The end of the drill bit body (101) is provided with two rows of drill teeth. Two flat adapter columns (1021) are fixedly installed on the rotary connecting column (102), and the two flat adapter columns (1021) are used to fit against the ground. The limit control component (3) includes: a stabilizing sleeve (301), an extension arm (3011), a positioning rod (302), and a detection disc (303); the limit control component (3) also includes: a position switch (304), which is fixedly installed at the bottom of the extension arm (3011) on the same side as the detection disc (303); the position switch (304) is used to detect ground contact; The stop protection component (4) includes: a stop mounting shell (401), an iron block (402), a positioning spring (403), a positioning post (404), and an electromagnet (405). The stop mounting shell (401) is fixedly installed at the bottom of the drill bit body (101). An iron block (402) is fixedly installed inside the stop mounting shell (401). A positioning spring (403) is sleeved inside the stop mounting shell (401). A positioning post (404) is slidably inserted into the stop mounting shell (401), and an electromagnet (405) is fixedly installed at the tail of the positioning post (404). The electromagnet (405) is aligned with the iron block (402). The positioning spring (403) is connected between the iron block (402) and the positioning post (404). The end of the positioning post (404) is chamfered. The positioning post (404) is used for the top of the stop stabilizing sleeve (301). The electromagnet (405) is electrically connected to the position switch (304).

2. The drilling device for foundation construction according to claim 1, characterized in that: The drill bit mounting component (1) further includes: a drill string connecting cylinder (103), a drill bit ring (104), and a connecting rod (1041). The drill string connecting cylinder (103) is fixedly installed on the top of the rotary connecting column (102), and the drill string connecting cylinder (103) is provided with two through holes. Two connecting rods (1041) are fixedly installed on the inner side of the drill bit ring (104), and the two connecting rods (1041) are respectively fixedly installed on the drill bit body (101). The drill bit ring (104) is fixedly installed at the bottom of the rotary connecting column (102). The bottom of the drill bit ring (104) and the connecting rod (1041) are respectively provided with drill teeth.

3. The drilling device for foundation construction according to claim 2, characterized in that: The sheet pile connector (2) includes: a sheet pile ring (201), a rotating block (202), and a limiting groove (2021). The sheet pile ring (201) is rotatably sleeved on the drill bit ring (104). The rotating block (202) is rotatably installed on the sheet pile ring (201). The rotating block (202) is used to rotate and adjust the drilling position. The rotating block (202) has a limiting groove (2021) and the limiting groove (2021) is used to cooperate with the buckle of the sheet pile. The limiting groove (2021) is used to slide up and down on the adjacent sheet pile. The rotating block (202) protrudes from the side of the drill bit body (101).

4. A drilling device for foundation construction according to claim 3, characterized in that: The sheet pile connector (2) further includes: positioning bolts (203), and threaded holes are provided on both sides of the rotating block (202); positioning bolts (203) are threadedly connected to the two threaded holes on the rotating block (202), and the ends of the two positioning bolts (203) are arc-shaped structures, and the ends of the two positioning bolts (203) are pressed and attached to the outside of the sheet pile ring (201); the tails of the two positioning bolts (203) are respectively provided with hexagonal holes.

5. A drilling device for foundation construction according to claim 1, characterized in that: The stabilizing sleeve (301) is sleeved on the drill bit body (101); the inner edge of the bottom of the stabilizing sleeve (301) is a beveled structure; two extension arms (3011) are fixedly installed on the outer side of the stabilizing sleeve (301), and positioning rods (302) are fixedly installed on the two extension arms (3011); the bottom of the two positioning rods (302) are tapered structures; the positioning rods (302) are used to insert into the ground; a detection disc (303) is slidably sleeved on the front positioning rod (302); a spring is fixedly installed on the top of the detection disc (303), and the end of the spring on the top of the detection disc (303) is connected to the bottom of the extension arm (3011) on the same side; the spring on the top of the detection disc (303) is sleeved on the positioning rod (302) on the same side.

6. A drilling device for foundation construction according to claim 1, characterized in that: The straight test piece (5) includes: a winding reel (501) and a test rope (502). The winding reel (501) is rotatably sleeved on the rotary connecting column (102). The winding reel (501) is provided with an annular groove. The test rope (502) is fixedly installed on the winding reel (501). The winding reel (501) is used to wind and wrap the test rope (502).

7. A drilling device for foundation construction according to claim 2, characterized in that: The anti-reverse thread component (6) includes: a protective insert plate (601) and a spring piece (602). The protective insert plate (601) is slidably inserted into the rotary connecting column (102). The protective insert plate (601) is used to block the two through holes on the drill string connecting cylinder (103). The spring piece (602) is fixedly installed at the bottom of the protective insert plate (601), and the spring piece (602) is located inside the rotary connecting column (102).

8. A drilling device for foundation construction according to claim 7, characterized in that: The anti-retraction thread component (6) further includes: a stop plate (603), the stop plate (603) is fixedly installed inside the rotary connecting column (102), and the end of the spring piece (602) is fixedly installed on the stop plate (603).

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