CN211573408U - Design drill bit of deep mixing pile - Google Patents
Design drill bit of deep mixing pile Download PDFInfo
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- CN211573408U CN211573408U CN202021653768.6U CN202021653768U CN211573408U CN 211573408 U CN211573408 U CN 211573408U CN 202021653768 U CN202021653768 U CN 202021653768U CN 211573408 U CN211573408 U CN 211573408U
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Abstract
The utility model provides a design drill bit of a deep mixing pile, a slurry outlet pipe is arranged in a movable inner pipe, the bottom end of the movable inner pipe is connected with two wings of drill bits, and the top surface of the movable inner pipe is provided with an inner piston; the propelling device is arranged on the outer side wall of the movable inner pipe; the inner wall of the outer pipe is provided with a limiting device; the inner diameter of the upper section of the outer piston is matched with the outer diameter of the inner piston, and the inner diameter of the lower section of the outer piston is matched with the outer diameter of the movable inner pipe; a lateral pulp inlet hole is formed in the side wall of the outer pipe; the outer wall of the outer pipe is provided with a straight blade. When the design drill bit of the deep mixing pile of the utility model drills into the soil body downwards, the drilling resistance of the drill bits of the two wings is reduced by injecting the slurry through the slurry outlet hole at the lower part, and the soil body cutting capacity of the drill bit is increased; when the drill bit is lifted upwards, slurry is sprayed to the lateral slurry outlet hole, soil is cut through the rotation of the linear blade, and the linear blade and the soil are fully stirred to form a pile body; the mode set according to the stress characteristics of the drill during drilling and lifting greatly improves the soil cutting and stirring capacity of the drill and reduces the budget pressure of construction departments.
Description
Technical Field
The utility model belongs to the technical field of geotechnical construction, a design drill bit of deep stirring stake is related to.
Background
The correct treatment of the soft soil foundation in the civil construction is a key link for guaranteeing the construction quality process, and the adoption of deep mixing piles for reinforcing the soft soil foundation is a common technical means. The deep mixing pile uses cement and other curing agents, and soft soil or sand and the curing agents are forcibly mixed in the foundation through a deep mixing machine, so that the soft foundation is hardened, the bearing capacity is improved, and the foundation settlement is reduced. At present, conventional deep mixing piles exist: (1) the blade mechanism on the stirring head is adopted to spray slurry, and the slurry is cut and stirred with soft soil or sand, so that the problems that a drilling tool at the bottom end of the stirring head is over stressed and is easily damaged exist; (2) the position of a drilling tool at the bottom end of the deep mixing pile is provided with a slurry outlet, slurry is sprayed from the slurry outlet and jointly cuts soil with the drilling tool, the stress of the drilling tool is reduced, but the mode also has the problems that the pile body of the deep mixing pile is small in diameter in the lifting process, the mixing is not uniform and the like, and the urgent need to be solved.
Accordingly, there is a need for an improvement in existing deep mixing pile drill bits to overcome the above-mentioned problems.
Disclosure of Invention
In order to achieve the purpose, the utility model provides a deep mixing pile's design drill bit designs according to the drill bit and forms with atress characteristics when promoting that it creeps into, has effectively improved the life of deep mixing pile drill bit, has solved the problem that exists among the prior art.
The technical proposal adopted by the utility model is that a design drill bit of a deep mixing pile comprises an outer pipe and a movable inner pipe; the upper end of the outer pipe is fixedly connected with the spiral conical joint; the outer pipe is connected with the movable inner pipe through a spline sleeve; the spline housing is fixedly connected with the outer pipe through a first gland screw; the movable inner pipe moves up and down along the axial direction in the spline housing; a slurry outlet pipe is arranged in the movable inner pipe along the axial direction; the bottom end of the slurry outlet pipe is provided with a lower slurry outlet hole; the bottom end of the movable inner pipe is fixedly connected with a two-wing drill bit; the periphery of the movable inner pipe close to the top end is provided with a plurality of strip-shaped lower slurry inlet holes; the top surface of the movable inner pipe is fixedly provided with an inner piston; the outer side end face of the inner piston is sleeved with a rubber grout stop plug; the annular propelling device is fixedly arranged on the outer side wall of the movable inner pipe and is positioned between the spline sleeve and the lower slurry inlet hole; a limiting device is fixedly arranged on the inner wall of the outer pipe; the outer piston is two sections which are integrally formed, the upper section is a hollow cylinder with a large hollow diameter, the lower section is a hollow cylinder with a small hollow diameter, the inner diameter of the upper section of the outer piston is matched with the outer diameter of the inner piston, and the inner diameter of the lower section of the outer piston is matched with the outer diameter of the movable inner tube; the linear blades are respectively arranged on the outer wall of the outer tube in an opposite way; a lateral pulp inlet hole is formed at the joint of the straight blade and the outer pipe; one end of the straight blade, which is far away from the outer pipe, is provided with a lateral pulp outlet, and the lateral pulp inlet is communicated with the lateral pulp outlet through a blade built-in pulp spraying pipe.
Further, the outer tube had an inner diameter of 50mm and an outer diameter of 114 mm.
Further, the height of the inner spline teeth arranged on the spline sleeve is 100mm, and the height of the outer spline teeth arranged on the movable inner pipe is 35 mm.
Furthermore, the top surface and the bottom surface of the spline housing connected with the movable inner tube are respectively provided with a rubber sealing ring.
Further, the outer diameter of the inner piston is larger than that of the movable inner tube.
Furthermore, the top and the bottom of the inner piston are respectively and fixedly provided with a sealing gland, and the upper end of the sealing gland is fixed on the top of the inner piston through a second gland screw.
Further, under the condition that the design drill bit of the deep mixing pile is lifted upwards and the two wing drill bits are not stressed, the height distance between the lower end of the limiting device and the upper end of the propelling device is 30 mm.
Further, the outer diameter of the propulsion device is smaller than the inner diameter of the limiting device.
Further, when the outer piston presses the limiting device, the upper end of the outer piston is lower than the lower end of the lateral pulp inlet hole, and the distance between the upper end of the outer piston and the upper end of the lateral pulp inlet hole is smaller than 10 mm.
Further, the outer diameter of the slurry outlet pipe is 32 mm.
The utility model has the advantages that: when the design drill bit of the deep mixing pile of the utility model drills into the soil body downwards, the slurry is sprayed through the lower slurry outlet hole, the drilling resistance of the two-wing drill bit is reduced, the soil body cutting capability of the drill bit is increased, and the service life of the two-wing drill bit is prolonged; when the drill bit is lifted upwards, slurry is sprayed through the lateral slurry outlet holes in the blades, and the slurry and the soil are fully stirred in the process of cutting the soil by the rotation of the linear blades to form a pile body; the setting mode is set according to the stress characteristics of the drill bit during drilling and lifting, the capacity of the drill bit for cutting and stirring soil bodies can be greatly improved, the damage rate of the drill bit is effectively reduced, the service life of the drill bit of the deep stirring pile is effectively prolonged, and the budget pressure of a construction department is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a design drill bit of the deep mixing pile of the present invention.
In the figure: 1-outer tube, 2-movable inner tube, 3-spline housing, 4-two-wing drill bit, 5-inner piston, 6-outer piston, 7-slurry outlet tube, 8-lower slurry outlet hole, 9-lower slurry inlet hole, 10-limiting device, 11-propelling device, 12-lateral slurry inlet hole, 13-straight blade, 14-blade built-in slurry spraying tube, 15-lateral slurry outlet hole, 16-first gland screw, 17-rubber sealing ring, 18-sealing gland, 19-second gland screw, 20-spiral cone type joint and 21-rubber slurry stop plug.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a design drill bit of deep mixing stake to the solution problem.
In order to solve the problem, the utility model discloses a design drill bit of deep mixing pile, including outer tube 1, activity inner tube 2, spline housing 3, both wings drill bit 4, inner piston 5, outer piston 6, play thick liquid pipe 7, lower part grout outlet 8, lower part grout inlet 9, stop device 10, advancing device 11, side direction grout inlet 12, a word blade 13, blade built-in shotcrete pipe 14, side direction grout outlet 15; the upper end of the outer pipe 1 is fixedly connected with a spiral conical joint 20; the bottom end of the outer pipe 1 is connected with the movable inner pipe 2 through a spline housing 3; the spline housing 3 is fixedly connected with the outer tube 1 through a first gland screw 16; the movable inner tube 2 moves up and down along the axial direction in the spline housing 3; a slurry outlet pipe 7 is arranged in the movable inner pipe 2 along the axial direction; the bottom end of the slurry outlet pipe 7 is provided with a lower slurry outlet hole 8; the bottom end of the movable inner pipe 2 is fixedly connected with a two-wing drill bit 4; a plurality of strip-shaped lower slurry inlet holes 9 are formed in the periphery of the movable inner pipe 2 close to the top end; the top surface of the movable inner tube 2 is fixedly provided with an inner piston 5; the inner piston 5 is cylindrical, and the outer diameter of the inner piston 5 is larger than that of the movable inner tube 2; the rubber grout stop plug 21 is sleeved on the outer end face of the inner piston 5; the annular propelling device 11 is fixedly arranged on the outer side wall of the movable inner pipe 2 and is positioned between the spline housing 3 and the lower slurry inlet hole 9, when a design drill bit of a deep mixing pile drills downwards, the two wing drill bits 4 are forced upwards, the movable inner pipe 2 moves upwards, the propelling device 11 also moves upwards along with the upward force, and when the design drill bit moves to the lower end of the outer piston 6, the outer piston 6 is pushed to move upwards; the inner wall of the outer tube 1 is fixedly provided with a limiting device 10; under the conditions that the design drill bit of the deep mixing pile is lifted upwards and the two wing drill bits 4 are not stressed, the height distance between the lower end of the limiting device 10 and the upper end of the propelling device 11 is 30 mm; the outer diameter of the propelling device 11 is smaller than the inner diameter of the limiting device 10; the outer piston 6 is two sections which are integrally formed, the upper section is a hollow cylinder with a large hollow diameter, the lower section is a hollow cylinder with a small hollow diameter, the inner diameter of the upper section of the outer piston 6 is matched with the outer diameter of the inner piston 5, and the inner diameter of the lower section of the outer piston 6 is matched with the outer diameter of the movable inner tube 2; when the designed drill bit of the deep mixing pile is lifted upwards, the two wing drill bits 4 are not stressed, the inner piston 5 moves downwards under the pressure action of slurry, when the inner piston moves to the upper end of the lower section of the outer piston 6, the outer piston 6 is driven to move downwards, the outer piston 6 moves downwards to the limiting device 10, the inner piston and the outer piston are tightly combined under the action of the limiting device 10, the lower slurry inlet hole 9 is tightly pressed, the lateral slurry inlet hole 12 is exposed, and the slurry enters through the lateral slurry inlet hole 12; two lateral pulp inlet holes 12 are oppositely arranged on the side wall of the outer tube 1, when the outer piston 6 presses the limiting device 10, the upper end of the outer piston 6 is lower than the lower end of the lateral pulp inlet holes 12, and the distance between the upper end of the outer piston 6 and the upper end of the lateral pulp inlet holes 12 is less than 10 mm; the straight blades 13 are respectively oppositely arranged on the outer wall of the outer pipe 1, the lateral pulp inlet holes 12 are arranged at the joint of the straight blades 13 and the outer pipe 1, the lateral pulp outlet holes 15 are arranged at one ends of the straight blades 13 far away from the outer pipe 1, and the lateral pulp inlet holes 12 are communicated with the lateral pulp outlet holes 15 through the built-in blade pulp spraying pipes 14.
Wherein, the inner diameter of the outer tube 1 is 50mm, and the outer diameter is 114 mm.
Wherein, the tooth height of the internal spline arranged on the spline housing 1 is 100mm, and the tooth height of the external spline arranged on the movable inner tube 2 is 35 mm.
Wherein, the top surface and the bottom surface of the spline housing 3 connected with the movable inner tube 2 are respectively provided with a rubber sealing ring 17.
Wherein, the top and the bottom of the inner piston 5 are respectively and fixedly provided with a sealing gland 18, and the upper end of the sealing gland 18 is fixed on the top of the inner piston 5 through a second gland screw 19.
The upper end of the outer pipe 1 is fixedly connected with a drill rod through a spiral cone-shaped joint 20, a slurry inlet hole is formed in the upper end of the drill rod, a slurry outlet channel is formed in the drill rod, and the inner diameter of the slurry outlet channel is the same as that of the outer pipe 1; the motor is arranged at the top end of the drill rod and controls the drill rod to stir up and down, so that the outer pipe 1 fixedly connected with the drill rod is driven to move correspondingly, and the spline sleeve 3 fixedly connected with the outer pipe 1 is driven to move correspondingly; because the movable inner pipe 2 is sleeved in the spline housing 3, when the drill rod sinks and is stirred, the two wing drill bits 4 fixedly connected with the movable inner pipe 2 are driven by the upward pressure of the soil body to move upwards to the bottom end of the spline housing 3, and the two wing drill bits and the movable inner pipe 2 are tightly clamped to form a whole, so that the movement form of the outer pipe 1 drives the two wing drill bits 4 and the movable inner pipe 2 to also do corresponding movement forms; when the drill rod is pulled up, the inner piston and the outer piston are tightly clamped on the limiting device 10 due to the impact force of the slurry because the two wing drill bits 4 are not stressed any more, and therefore the movable inner tube 2 fixedly connected with the inner piston 5 and the two wing drill bits 4 are driven to move downwards to the maximum.
Wherein, the outer diameter of the slurry outlet pipe 7 is 32 mm.
The utility model discloses a in-process that the design drill bit of deep mixing pile carries out soil body and creeps into, both wings drill bit 4 receives the ascending pressure of soil body, drives the activity inner tube 2 fixed connection with it and moves upwards to drive the inner piston 5 that is connected with activity inner tube 2 and move upwards, because both wings drill bit 4 top rises to 3 bottoms of spline housing just can not rise again, and the distance of both wings drill bit 4 top and 3 bottoms of spline housing is 40mm, therefore, activity inner tube 2 also rises 40mm, inner piston 5 also rises 40 mm; because the top end of the propelling device 11 is 30mm away from the bottom end of the outer piston 6, when the movable inner tube 2 ascends, the propelling device 11 also ascends along with the movable inner tube and reaches the bottom end of the outer piston 6 when the movable inner tube ascends by 30mm, and the movable inner tube continues to ascend to push the outer piston 6 to move upwards by 10 mm; because the distance between the upper end of the outer piston 6 and the upper end of the lateral slurry inlet hole 12 is less than 10mm, at the moment, the lateral slurry inlet hole 12 is tightly pressed by the outer piston 6, a 30mm gap is formed between the inner piston 5 and the outer piston 6, slurry enters the lower slurry inlet hole 9 through the 30mm gap, and then is ejected out of the slurry outlet pipe 7 and the lower slurry outlet hole 8 communicated with the lower slurry inlet hole 9 to cut soil, so that the drilling resistance of the two-wing drill bit 4 is reduced.
The utility model discloses a novel design drill bit of deep mixing stake carries out the in-process that promotes, because two wing drill bits 4 atress no longer, interior piston 5 downstream under the pressure effect of thick liquid, and drive outer piston 6 also downstream simultaneously, outer piston 6 downstream to stop device 10 position, interior outer piston closely combines under stop device 10's effect, advance the lower part thick liquid hole 9 and tightly push down, and the side direction advances thick liquid hole 12 and exposes, the thick liquid advances thick liquid hole 12 entering through the side direction promptly, through the built-in grout spraying pipe 14 of a word blade 13's blade, 15 jet thick liquids in side direction grout outlet hole, at the in-process of a word blade 13 gyration cutting soil body, with the soil body intensive mixing, form the pile body.
Utilize the utility model discloses a deep mixing pile's design drill bit carries out deep mixing pile construction technology and adopts conventional process means all can to realize, a construction technology is listed to the following:
1. positioning, centering and leveling a pile machine;
2. adjusting the verticality of the guide frame;
3. premixing to prepare slurry;
4. stirring and sinking: starting a deep mixing pile machine turntable, and after the rotating speed of a mixing head is normal, enabling a drill rod to sink along a guide frame while mixing, wherein the sinking speed can be regulated and controlled through gears, and the working current is not larger than a rated value;
5. spraying, stirring and lifting: after the slurry is sunk to reach the designed depth, starting an mortar pump, delivering the slurry to a slurry outlet of the stirring head through a pipeline, starting a stirring pile machine and a tensioning chain device after slurry is discharged, and lifting a drill rod while spraying and stirring the slurry according to the lifting speed determined by design so as to fully mix the slurry and the soil body;
6. and (3) repeatedly stirring and sinking: after the stirring drill bit is lifted to a height of 500mm above the pile top, the mortar pump is closed, the stirring is repeated until the stirring is sunk to the designed depth, and the sinking speed is carried out according to the design requirement;
7. and (3) repeatedly stirring and lifting the guniting: after the slurry sinks to reach the designed depth, the slurry is repeatedly stirred and lifted, and the slurry is lifted to the ground all the time;
8. the pile machine is shifted: and after one pile is constructed, moving the pile machine to the next pile position, and repeating the steps to construct the next pile.
It should be noted that the terms first, second and third in the present invention have no actual meanings or sequences. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A design drill bit of a deep mixing pile is characterized by comprising an outer pipe (1) and a movable inner pipe (2); the upper end of the outer pipe (1) is fixedly connected with a spiral conical joint (20); the outer pipe (1) is connected with the movable inner pipe (2) through a spline sleeve (3); the spline sleeve (3) is fixedly connected with the outer tube (1) through a first gland screw (16); the movable inner pipe (2) moves up and down along the axial direction in the spline housing (3); a slurry outlet pipe (7) is arranged in the movable inner pipe (2) along the axial direction; the bottom end of the slurry outlet pipe (7) is provided with a lower slurry outlet hole (8); the bottom end of the movable inner tube (2) is fixedly connected with a two-wing drill bit (4); a plurality of strip-shaped lower pulp inlet holes (9) are formed in the periphery of the movable inner pipe (2) close to the top end; an inner piston (5) is fixedly arranged on the top surface of the movable inner tube (2); the outer side end face of the inner piston (5) is sleeved with a rubber grout stop plug (21); the annular propelling device (11) is fixedly arranged on the outer side wall of the movable inner pipe (2) and is positioned between the spline sleeve (3) and the lower slurry inlet hole (9); a limiting device (10) is fixedly arranged on the inner wall of the outer pipe (1); the outer piston (6) is two sections which are integrally formed, the upper section is a hollow cylinder with a large hollow diameter, the lower section is a hollow cylinder with a small hollow diameter, the inner diameter of the upper section of the outer piston (6) is matched with the outer diameter of the inner piston (5), and the inner diameter of the lower section of the outer piston (6) is matched with the outer diameter of the movable inner tube (2); the linear blades (13) are respectively arranged on the outer wall of the outer pipe (1) in an opposite way; a lateral pulp inlet hole (12) is arranged at the joint of the straight blade (13) and the outer pipe (1); one end of the straight blade (13) far away from the outer pipe (1) is provided with a lateral pulp outlet hole (15), and the lateral pulp inlet hole (12) is communicated with the lateral pulp outlet hole (15) through a blade built-in pulp spraying pipe (14).
2. A deep mixing pile design drill according to claim 1, characterized in that the outer pipe (1) has an inner diameter of 50mm and an outer diameter of 114 mm.
3. The deep mixing pile design drill bit as claimed in claim 1, wherein the height of the internal spline teeth arranged on the spline housing (3) is 100mm, and the height of the external spline teeth arranged on the movable inner tube (2) is 35 mm.
4. The deep mixing pile design drill bit as claimed in claim 1, characterized in that the top and bottom surfaces of the spline housing (3) connected with the movable inner tube (2) are respectively provided with rubber sealing rings (17).
5. A deep mixing pile design drill according to claim 1, characterized in that the outer diameter of the inner piston (5) is larger than the outer diameter of the movable inner tube (2).
6. The deep mixing pile design drill bit as claimed in claim 5, wherein the top and bottom of the inner piston (5) are respectively and fixedly provided with a gland (18), and the upper end of the gland (18) is fixed on the top of the inner piston (5) through a second gland screw (19).
7. The deep mixing pile design drill bit as claimed in claim 1, characterized in that the lower end of the limiting device (10) is 30mm away from the upper end of the propelling device (11) under the condition that the design drill bit of the deep mixing pile is lifted upwards and the two wing drill bits (4) are not stressed.
8. A pile-driver bit according to claim 7, characterised in that the outer diameter of the propelling means (11) is smaller than the inner diameter of the limiting means (10).
9. The drill bit for deep mixing pile design according to claim 1, characterized in that when the outer piston (6) presses the limiting device (10), the upper end of the outer piston (6) is lower than the lower end of the lateral grout inlet hole (12), and the distance between the upper end of the outer piston (6) and the upper end of the lateral grout inlet hole (12) is less than 10 mm.
10. A deep mixing pile design drill according to claim 1, characterized in that the slurry outlet pipe (7) has an outer diameter of 32 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021653768.6U CN211573408U (en) | 2020-08-11 | 2020-08-11 | Design drill bit of deep mixing pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021653768.6U CN211573408U (en) | 2020-08-11 | 2020-08-11 | Design drill bit of deep mixing pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211573408U true CN211573408U (en) | 2020-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021653768.6U Active CN211573408U (en) | 2020-08-11 | 2020-08-11 | Design drill bit of deep mixing pile |
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| Country | Link |
|---|---|
| CN (1) | CN211573408U (en) |
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2020
- 2020-08-11 CN CN202021653768.6U patent/CN211573408U/en active Active
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