Drilling device for foundation construction

Abstract

The invention discloses a drilling device for foundation construction, and relates to the technical field of drilling. Comprising a drill bit mounting piece, and a sheet pile connecting piece is mounted on the drill bit mounting piece and used for preventing drilling deviation; the drill bit mounting piece is sleeved with a limiting control piece; the limiting control piece is used for improving the drilling stability; two stop protection pieces are mounted on the drill bit mounting piece; the two stop protection pieces are used for stopping the limiting control piece; the sheet pile connecting piece is adopted to be matched with the drill bit mounting piece so that guiding work can be conducted through the mounted steel sheet pile during drilling work, the drilling precision of the structure can be improved, and drilling deviation of the drill bit body caused by riprap and other factors in the drilling process of the drill bit body can be avoided; the problems that an existing drilling device for foundation construction cannot be conveniently matched with an installed steel sheet pile for guiding, and the drilling stability cannot be conveniently improved through automatic control are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling, in particular to a drilling device for foundation construction. Background Art

[0002] In actual foundation construction work, steel sheet pile cofferdam foundation is a common foundation construction form. In order to ensure the smooth insertion of steel sheet piles, it is usually adopted to first drill a guide hole in the ground to guide the steel sheet piles. In order to ensure the drilling efficiency, a long spiral drill bit is usually used for drilling. When the current foundation construction drilling device is drilling at a deep depth, the deformation of the drill rod and the squeezing of underground rocks can easily cause the guide hole to deviate, and it can also easily cause wear to the steel sheet piles. It is not convenient to adapt to the installed steel sheet piles for guidance, and it will also affect the accuracy of the steel sheet pile corners and the quality of the steel sheet pile cofferdam. It is also not convenient to automatically control and increase the drilling stability. The longer drill bit has poor drilling stability and can easily cause the hole diameter to increase. It is time-consuming and labor-intensive to manually install a stable structure. It is also not convenient for humans to quickly test the straightness of the drill bit externally, and the self-inspection is not flexible enough.

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

[0004] The purpose of the present invention is to provide a drilling device for foundation construction to solve the problem raised in the above background technology that the current drilling device for foundation construction is not convenient for adapting to the installed steel sheet piles for guidance, nor is it convenient for automatic control to increase drilling stability.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a drilling device for foundation construction, comprising a drill bit mounting part, a sheet pile connecting part being installed on the drill bit mounting part, and the sheet pile connecting part being used to prevent drilling deviation; a limit control part is sleeved on the drill bit mounting part; the limit control part is used to increase drilling stability; two stop protection parts are installed on the drill bit mounting part; the two stop protection parts are used to stop the limit control part; a straight line test part is installed on the drill bit mounting part; an anti-thread backlash part is installed on the drill bit mounting part; the anti-thread backlash part is used to prevent the pin column from loosening; the drill bit mounting part comprises: a drill bit body, a rotary connecting column and a flat adapter column, a rotary connecting column is fixedly installed on the top of the drill bit body; a rotary groove is provided on the rotary connecting column; two rows of drill teeth are provided on the end of the drill bit body; two flat adapter columns are fixedly installed on the rotary connecting column, and the two flat adapter columns are used to fit the ground.

[0006] Preferably, the drill bit mounting part also includes: a drill string connecting tube, a drill bit ring and a connecting rod. The drill string connecting tube is fixedly mounted on the top of the rotary connecting column, and two through holes are provided on the drill string connecting tube; two connecting rods are fixedly mounted on the inner side of the drill bit ring, and the two connecting rods are respectively fixedly mounted on the drill bit body; the drill bit ring is fixedly mounted on the bottom of the rotary connecting column; drill teeth are respectively provided on the bottom of the drill bit ring and the connecting rod.

[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 ring; the sheet pile ring is rotatably mounted with a rotating block; the rotating block is used to rotate and adjust the drilling position; a limiting groove is provided on the rotating block, and the limiting groove is used to cooperate with the buckle of the steel sheet pile; the limiting groove is used to lift and slide on adjacent steel sheet piles; the rotating block protrudes from the side of the drill body.

[0008] Preferably, the sheet pile connector also includes: a positioning bolt, and threaded holes are respectively provided on both sides of the rotating block; positioning bolts are respectively threadedly connected in the two threaded holes on the rotating block, and the ends of the two positioning bolts are respectively arc-shaped structures, and the two ends of the positioning bolts are respectively squeezed and fitted on the outside of the sheet pile ring; the tails of the two positioning bolts are respectively provided with hexagonal holes.

[0009] Preferably, the limit control component includes: a stabilizing sleeve, an extension arm, a positioning rod and a detection disk, the stabilizing sleeve is sleeved on the drill bit body; the inner edge of the bottom of the stabilizing sleeve is a bevel structure; two extension arms are fixedly installed on the outside of the stabilizing sleeve, and the two extension arms are respectively fixedly installed with positioning rods; the bottoms of the two positioning rods are respectively conical structures; the positioning rod is used to be inserted into the ground; a detection disk is slidably sleeved on the front positioning rod; a spring is fixedly installed on the top of the detection disk, and the spring end at the top of the detection disk is connected to the bottom of the extension arm on the same side; the spring at the top of the detection disk is sleeved on the positioning rod on the same side.

[0010] Preferably, the limit control component further includes: an in-position switch, which is fixedly mounted on the bottom of the extension arm on the same side of the detection plate; the in-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 column and an electromagnet, the stop mounting shell is fixedly mounted on the bottom of the drill body; an iron block is fixedly mounted inside the stop mounting shell; a positioning spring is sleeved inside the stop mounting shell; a positioning column is slidably inserted on the stop mounting shell, and an electromagnet is fixedly mounted on the tail of the positioning column, and the electromagnet is aligned with the iron block; the positioning spring is connected between the iron block and the positioning column; the end of the positioning column is chamfered; the positioning column is used to stop and stabilize the top of the sleeve; the electromagnet is electrically connected to the positioning switch.

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

[0013] Preferably, the anti-wire back-off component includes: a protective plug plate and a spring piece, the protective plug plate is slidably plugged into the rotary connecting column; the protective plug plate is used to block the two through holes on the drill string connecting tube; a spring piece is fixedly installed on the bottom of the protective plug plate, and the spring piece is located inside the rotary connecting column.

[0014] Preferably, the anti-wire-retraction component further comprises: a stop plate, the stop plate is fixedly mounted inside the rotary connecting column, and the end of the spring piece is fixedly mounted on the stop plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention adopts a sheet pile connector in conjunction with a drill bit mounting part, which can be used to guide the installed steel sheet piles during drilling work, thereby improving the accuracy of the structure during drilling, and avoiding the drilling deviation of the drill bit body due to factors such as rocks during the drilling process of the drill bit body. The structure is simple and compact, and can ensure the quality of drilling. At the same time, the structure uses a rotating block that can be rotatably adjusted, which can be rotatably adjusted and can better adapt to the turning work of the steel plate without affecting the accuracy quality of the steel plate turning part, and has stronger adaptability.

[0016] The use of stop protection parts can be used to control stable operation, ensure the stability of the drill bit body above the ground during the drilling process, prevent the hole diameter from being too large due to the shaking of the drill bit body, and prevent the side of the drill bit body from excessively rubbing against the adjacent steel sheet piles. This structure can be inserted into the ground for stable operation, and the limit control part can be used to automatically control the limit release of the positioning column. There is no need to manually install the positioning rod, avoiding time-consuming and labor-intensive manual installation. It can be completely operated by the drilling rig driver, which can improve the rationality of the structure, can be reused, is more efficient, and promotes the precision quality of the steel sheet piles after splicing.

[0017] The use of a straight line test piece allows staff to quickly check the straightness of the drill bit body. The operation is simple and flexible, and self-inspection work can be carried out outdoors more simply and directly. The use of an anti-thread backlash piece can more directly ensure the stable installation of the pin passing through the drill string connecting tube to prevent the pin from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a drilling device for foundation construction according to the present invention; Figure 2 This is a schematic diagram of the position of the detection rope of the present invention; Figure 3This is a cross-sectional view of the internal structure of a drilling device for foundation construction according to the present invention; Figure 4 This is a structural diagram of the drill bit mounting member of the present invention; Figure 5 For the present invention Figure 4 A magnified view of the structure of the middle B region; Figure 6 This is a schematic diagram of the rotating block structure of the present invention; Figure 7 This is a schematic diagram of the structure of the limit control component of the present invention; Figure 8 For the present invention Figure 2 A magnified view of the structure of the middle C region; Figure 9 For the present invention Figure 3 A magnified view of the structure of the middle D region; Figure 10 This is a schematic diagram of the installation position of the stopper mounting shell of the present invention; Figure 11 This is a schematic structural diagram of the anti-wire-backward component of the present invention; Figure 12 Schematic diagram of the sheet pile ring structure of the present invention.

[0019] In the figure: 1. Drill bit mounting part; 101. Drill bit body; 102. Rotary connecting column; 1021. Flat adapter column; 103. Drill string connecting tube; 104. Drill bit ring; 1041. Connecting rod; 2. Sheet pile connecting part; 201. Sheet pile ring; 202. Rotating block; 2021. Limiting groove; 203. Positioning bolt; 3. Limiting control part; 301. Stabilizing sleeve; 3011. Extension arm; 302. Positioning rod; 303. Detection disk; 304. In-position switch; 4. Stop protection part; 401. Stop mounting shell; 402. Iron block; 403. Spring; 404. Positioning column; 405. Electromagnet; 5. Linear test piece; 501. Reel; 502. Detection rope; 6. Anti-wire backlash part; 601. Protective plug-in plate; 602. Shrapnel; 603. Stop plate. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figures 1 to 12 As shown: The present invention provides a technical solution: a drilling device for foundation construction, comprising a drill bit mounting member 1, a sheet pile connector 2 mounted on the drill bit mounting member 1, the sheet pile connector 2 being used to prevent drilling deviation; a limit control member 3 sleeved on the drill bit mounting member 1; the limit control member 3 being used to increase drilling stability; two stop protection members 4 being mounted on the drill bit mounting member 1; the two stop protection members 4 being used to stop the limit control member 3; a straight line test member 5 being mounted on the drill bit mounting member 1; and a straight line test member 5 being mounted on the drill bit mounting member 1. A wire-retraction prevention part 6 is installed; the wire-retraction prevention part 6 is used to prevent the pin from loosening; the drill bit mounting part 1 includes: a drill bit body 101, a rotary connecting column 102 and a flat adapter column 1021, and a rotary connecting column 102 is fixedly installed on the top of the drill bit body 101; a rotary groove is provided on the rotary connecting column 102; two rows of drill teeth are provided on the end of the drill bit body 101; 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 on the ground.

[0022] Among them, the drill bit mounting part 1 also includes: a drill string connecting tube 103, a drill bit ring 104 and a connecting rod 1041. The drill string connecting tube 103 is fixedly installed on the top of the rotary connecting column 102, and two through holes are provided on the drill string connecting tube 103; 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 rod 1041; the sheet pile connecting part 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 Equipped with a rotating block 202; the rotating block 202 is used to rotate and adjust the drilling position; a limiting groove 2021 is provided on the rotating block 202, and the limiting groove 2021 is used to cooperate with the buckle of the steel sheet pile; the limiting groove 2021 is used to lift and slide on the adjacent steel sheet pile; the rotating block 202 protrudes from the side of the drill bit body 101; the sheet pile connector 2 also includes: a positioning bolt 203, and threaded holes are respectively provided on both sides of the rotating block 202; the two threaded holes on the rotating block 202 are respectively threadedly connected with the positioning bolts 203, and the ends of the two positioning bolts 203 are respectively arc-shaped structures, and the ends of the two positioning bolts 203 are respectively squeezed and fitted on the outside of the sheet pile ring 201; the tails of the two positioning bolts 203 are respectively provided with hexagonal shaped hole, the sheet pile connector 2 is used in conjunction with the drill bit mounting part 1 to guide the installed steel sheet pile during drilling work, which can improve the accuracy of the structure during drilling, and can avoid the drilling deviation of the drill bit main body 101 due to factors such as rocks during the drilling process of the drill bit main body 101. The structure is simple and compact, which can ensure the quality of drilling. At the same time, the structure uses a rotatable and adjustable rotating block 202, which can be rotated and adjusted to better adapt to the turning work of the steel plate without affecting the accuracy quality of the steel plate turning part. The sheet pile connector 2 is used in conjunction with the drill bit mounting part 1 for simple and convenient operation, and can be more suitable for small-diameter deep hole drilling, ensuring the construction quality of steel sheet piles, and driving the drill bit main body through the drilling rig 101 moves downward and rotates for drilling, and the sheet pile ring 201 rotates and adapts on the drill ring 104. At the same time, as the drill ring 104 rotates, the drill teeth at the bottom of the drill ring 104 can assist in drilling. The drilling range of the drill ring 104 is close to the adjacent steel sheet piles, which does not affect the downward movement of the rotating block 202. The rotating block 202 always slides on the side buckle guide of the installed steel sheet pile. According to needs, two positioning bolts 203 can be inserted and rotated with a hexagonal wrench to adjust the angle of the rotating block 202, which can increase adaptability. When the drill body 101 is removed from the drilling rig and placed on the ground, it can be fitted to the ground through two flat adapter columns 1021 to prevent the drill body 101 from rolling at will and improve stability.

[0023] Among them, the limit control part 3 includes: a stabilizing sleeve 301, an extension arm 3011, a positioning rod 302 and a detection disk 303, 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 bevel structure; two extension arms 3011 are fixedly installed on the outside of the stabilizing sleeve 301, and the two extension arms 3011 are respectively fixedly installed with a positioning rod 302; the bottoms of the two positioning rods 302 are respectively conical structures; the positioning rod 302 is used to be inserted into the ground; the detection disk 303 is slidably sleeved on the front positioning rod 302; a spring is fixedly installed on the top of the detection disk 303, and the spring end of the top of the detection disk 303 is connected to the bottom of the extension arm 3011 on the same side; the spring at the top of the detection disk 303 is sleeved on the stabilizing sleeve 301 on the same side 302; the limit control member 3 also includes: an in-position switch 304, which is fixedly mounted at the bottom of the extension arm 3011 on the same side of the detection disk 303; the in-position switch 304 is used to detect ground contact; the stop protection member 4 includes: a stop mounting shell 401, an iron block 402, a positioning spring 403, a positioning column 404 and an electromagnet 405, the stop mounting shell 401 is fixedly mounted at the bottom of the drill body 101; the stop mounting shell 401 is fixedly mounted with an iron block 402; the stop mounting shell 401 is sleeved with a positioning spring 403; the stop mounting shell 401 is slidably plugged with a positioning column 404, and the tail of the positioning column 404 is fixedly mounted with an electromagnet 405, and the electromagnet 405 is aligned with the iron block 402; the positioning spring 403 301 ; the bottom of the drill bit body 101 is guided by the rotating block 202 to ensure accuracy and stability, while the upper part of the drill bit body 101 can be more stable. The limit control part 3 is used to realize the limit release of the automatic control positioning column 404, without the need for manual installation of the positioning rod 302, avoiding the time-consuming and labor-intensive manual installation, and can be completely operated by the drilling rig driver, which can improve the rationality of the structure, can be reused, and is more efficient, thereby promoting the precision quality of the steel sheet piles after splicing. As the drilling rig drives the positioning rod 302 to gradually penetrate into the ground, the ground will stop the detection disk 303, and the detection disk 303 will move up and press the position switch 304. At this time, the electromagnet 405 is connected to the electromagnetic iron block 402, and the positioning column 404 can be retracted, the positioning spring 403 is compressed, and the positioning column 404 no longer stops the stabilizing sleeve 301. Subsequently, under the surrounding stability of the stabilizing sleeve 301, the drilling of the drill bit body 101 is more stable.

[0024] Example 2, based on Example 1, the linear test piece 5 includes: a winding disk 501 and a detection rope 502, the winding disk 501 is rotatably sleeved on the rotary connecting column 102; an annular groove is provided on the winding disk 501; the detection rope 502 is fixedly installed on the winding disk 501; the winding disk 501 is used to wind up the detection rope 502; the anti-wire backlash component 6 includes: a protective plug plate 601 and a spring piece 602, the protective plug plate 601 is slidably plugged into the rotary connecting column 102; the protective plug plate 601 is used to block the two through holes on the drill string connecting tube 103; the spring piece 602 is fixedly installed at the bottom of the protective plug plate 601, and the spring piece 602 is located inside the rotary connecting column 102; the anti-wire backlash component 6 also includes: a stop plate 603, a stop plate 603 is fixedly installed inside the rotary connecting column 102, and the end of the spring piece 602 is fixedly installed Installed on the stop plate 603, the use of the straight test piece 5 can facilitate the staff to quickly check the straightness of the drill bit body 101. The operation is simple and flexible, and self-inspection work can be carried out outdoors more simply and directly to ensure that the straightness of the drill bit body 101 meets the standard for drilling. At the same time, the detection rope 502 can be quickly wrapped and bundled on the reel 501 for storage. The use of the anti-wire-back component 6 can more directly ensure the stable installation of the pin passing through the drill string connecting tube 103 to avoid the pin from falling off. It can also prevent the wire from falling off for the pin with a thread. The structure is simple and reasonable. The end of the detection rope 502 is manually pulled. After tightening the detection rope 502, the consistency of the distance between the detection rope 502 and the spiral blade on the outside of the drill bit body 101 is observed. Once a part is protruding or concave, it means that the drill bit body 101 is bent.

[0025] The working principle of this embodiment is as follows: first, insert the drill string into the drill string connecting tube 103, and pass the drill string connecting tube 103 and the drill string of the drill rig through the pin. When the pin passes through the drill string connecting tube 103 and the drill string of the drill rig, first press down the protection plug plate 601. After the pin is installed, loosen the protection plug plate 601 and the spring piece 602 can elastically push the protection plug plate 601 to reset. Use the protection plug plate 601 to block the pin. When drilling, the first steel sheet pile can be drilled through the drill bit body 101 and then inserted into the ground. Then, insert the limiting groove 2021 into the side buckle of the previous steel sheet pile. At this time, cooperate with the buckle limit of the steel sheet pile to pass through. The drill rig drives the drill body 101 to move downward and rotate for drilling, and the sheet pile ring 201 rotates and adapts on the drill ring 104. At the same time, as the drill ring 104 rotates, the drill teeth at the bottom of the drill ring 104 can assist in drilling. The drilling range of the drill ring 104 is close to the adjacent steel sheet piles, which does not affect the downward movement of the rotating block 202. The rotating block 202 always slides on the side buckle guide of the installed steel sheet pile. According to needs, the two positioning bolts 203 can be inserted and rotated with a hexagonal wrench to squeeze and fit the two positioning bolts 203 on the outside of the sheet pile ring 201. The angle of the rotating block 202 can be adjusted to increase adaptability. 01 Before moving down and rotating to drill, because the rotating block 202 will stop the stabilizing sleeve 301 and the stabilizing sleeve 301 will not fall off, the drill body 101 can be rotated first to drive the stabilizing sleeve 301 to rotate, and the positioning rod 302 can be controlled to be located on the ground on both sides of the steel sheet pile. At this time, the drill body 101 can be controlled to move down and drill normally. During the process, the positioning rod 302 will be inserted into the ground. As the positioning rod 302 gradually penetrates deeper, the ground will stop the detection disk 303, and the detection disk 303 will move up and press the position switch 304. At this time, the electromagnet 405 will turn on the electromagnetic iron block 402, the positioning column 404 can be retracted, the positioning spring 403 is compressed, and the positioning column 404 is compressed. 04 will no longer stop the stabilizing sleeve 301. Subsequently, under the surrounding stability of the stabilizing sleeve 301, the drilling of the drill body 101 will be more stable. At the same time, as the subsequent drilling is completed and the drill body 101 is raised, the stabilizing sleeve 301 can be moved down to the bottom end of the drill body 101 under the action of its own weight. During the process, the bottom inclined surface of the stabilizing sleeve 301 can be used to squeeze the positioning column 404 to elastically retract without causing jamming. The whole process can be operated by the drilling rig operator. When it is necessary to test the straightness of the drill body 101 later, the detection rope 502 can be removed, and the end of the detection rope 502 can be manually pulled. After tightening the detection rope 502, 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 at various positions on the outside of the drill bit body 101. Once there is a local protrusion or depression, it means that the drill bit body 101 is bent. The winding disk 501 can be rotated to adjust the inspection position so that the detection rope 502 can detect 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 around the winding disk 501 and tied tightly.

[0026] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0027] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A drilling device for foundation construction, comprising a drill bit mounting member (1), a sheet pile connector (2) being mounted on the drill bit mounting member (1), characterized in that: The sheet pile connector (2) is used to prevent drilling deviation; a limit control component (3) is sleeved on the drill bit mounting component (1); the limit control component (3) is used to increase drilling stability; Two stop protection members (4) are installed on the drill bit mounting member (1); the two stop protection members (4) are used to stop the limit control member (3); A straight line test piece (5) is mounted on the drill bit mounting piece (1); a wire-removing prevention piece (6) is mounted on the drill bit mounting piece (1); the wire-removing prevention piece (6) is used to prevent the pin from loosening; The drill bit mounting member (1) comprises: a drill bit body (101), a rotary connecting column (102) and a horizontally placed adapting column (1021); the rotary connecting column (102) is fixedly mounted on the top of the drill bit body (101); a rotary groove is provided on the rotary connecting column (102); two rows of drill teeth are provided at the end of the drill bit body (101); two horizontally placed adapting columns (1021) are fixedly mounted on the rotary connecting column (102), and the two horizontally placed adapting columns (1021) are used to fit on the ground.

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

3. A drilling device for foundation construction according to claim 2, characterized in that: The sheet pile connector (2) comprises: 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 ring (104); the rotating block (202) is rotatably mounted on the sheet pile ring (201); the rotating block (202) is used to rotatably adjust the drilling position; the rotating block (202) is provided with a limiting groove (2021), and the limiting groove (2021) is used to cooperate with a buckle sleeved into a steel sheet pile; the limiting groove (2021) is used to lift and slide on adjacent steel sheet piles; the rotating block (202) protrudes from the side of the drill body (101).

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

5. The drilling device for foundation construction according to claim 1, characterized in that: The position limiting control member (3) comprises: a stabilizing sleeve (301), an extension arm (3011), a positioning rod (302) and a detection disk (303), wherein 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 bevel structure; two extension arms (3011) are fixedly mounted on the outside of the stabilizing sleeve (301), and the two extension arms (3011) are respectively fixedly mounted with positioning rods (302); the bottoms of the two positioning rods (302) are respectively tapered; the positioning rods (302) are used to be inserted into the ground; the detection disk (303) is slidably sleeved on the front positioning rod (302); a spring is fixedly mounted on the top of the detection disk (303), and the end of the spring at the top of the detection disk (303) is connected to the bottom of the extension arm (3011) on the same side; the spring at the top of the detection disk (303) is sleeved on the positioning rod (302) on the same side.

6. A drilling device for foundation construction according to claim 5, characterized in that: The position limiting control member (3) further comprises an in-position switch (304), wherein the in-position switch (304) is fixedly mounted on the bottom of the extension arm (3011) on the same side as the detection plate (303); the in-position switch (304) is used to detect ground contact.

7. A drilling device for foundation construction according to claim 6, characterized in that: The stop protection member (4) comprises: a stop mounting shell (401), an iron block (402), a positioning spring (403), a positioning column (404) and an electromagnet (405), wherein the stop mounting shell (401) is fixedly mounted on the bottom of the drill body (101); the iron block (402) is fixedly mounted inside the stop mounting shell (401); the positioning spring (403) is sleeved inside the stop mounting shell (401); the positioning column (404) is slidably inserted on the stop mounting shell (401), and the electromagnet (405) is fixedly mounted on the tail of the positioning column (404), and the electromagnet (405) is aligned with the iron block (402); the positioning spring (403) is connected between the iron block (402) and the positioning column (404); the end of the positioning column (404) is chamfered; the positioning column (404) is used to stop the top of the stabilizing sleeve (301); and the electromagnet (405) is electrically connected to the in-position switch (304).

8. The drilling device for foundation construction according to claim 1, characterized in that: The linear test piece (5) comprises: a reel (501) and a detection rope (502); the reel (501) is rotatably sleeved on a rotary connecting column (102); an annular groove is provided on the reel (501); the detection rope (502) is fixedly mounted on the reel (501); and the reel (501) is used for reeling and winding the detection rope (502).

9. The drilling device for foundation construction according to claim 2, characterized in that: The anti-thread-retraction member (6) comprises: a protective plug plate (601) and a spring piece (602); the protective plug plate (601) is slidably plugged into the rotary connecting column (102); the protective plug plate (601) is used to shield two through holes on the drill string connecting tube (103); the spring piece (602) is fixedly mounted on the bottom of the protective plug plate (601), and the spring piece (602) is located inside the rotary connecting column (102).

10. The drilling device for foundation construction according to claim 9, characterized in that: The anti-wire-retraction member (6) further comprises a stop plate (603), the stop plate (603) being fixedly mounted inside the rotary connecting column (102), and the end of the spring piece (602) being fixedly mounted on the stop plate (603).

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