A three-axis mixing pile device and construction method thereof

Abstract

The present application relates to a three-axis mixing pile device and a construction method thereof, and relates to the field of building construction technology. The three-axis mixing pile device includes a body, on which three drill rods for drilling are provided, a drill bit is fixed to the lower end of each drill rod, a spiral blade is provided on the outer wall of each drill rod, a support frame is provided on each drill rod to connect the three drill rods, a three-way groove is provided on the support frame for the three drill rods to pass through, a rotating cylinder is rotatably connected in the through groove, a spiral groove is provided in the rotating cylinder to cooperate with the spiral blade, the rotating cylinder is fixed relative to the support frame, the rotating cylinder moves up and down with the rotation of the spiral blade, and a positioning mechanism is provided in the support frame to keep the rotating cylinder stationary relative to the support frame. The present application has the effect of maintaining the stability of the drill rods while preventing interference from the support frame.

Description

Technical Field

[0001] The present application relates to the technical field of building construction, and in particular to a three-axis mixing pile device and a construction method thereof. Background Art

[0002] In soft soil foundation treatment projects, when anti-seepage pile construction is carried out on the foundation formed by filling, three-axis mixing piles are often used for anti-seepage wall construction. It is a kind of long spiral pile driver with three spiral drill holes. During construction, the three spiral drill holes are constructed downward at the same time. The mixing pile driver is used to spray cement in and fully mix it, so that a series of physical and chemical reactions occur between the cement and the soil, which hardens the soft soil and improves the foundation strength.

[0003] Patent application CN211342754U discloses a three-axis mixing pile for deep foundation pits, comprising three drill rod bodies arranged side by side, with drill bits disposed at the ends of the drill rod bodies. The drill rod bodies include an outer drill rod and an inner drill rod, a cement slurry channel formed between the outer and inner drill rods, and a grouting port disposed within the drill bit, connected to the cement slurry channel. A horizontal support frame is disposed between the drill rod bodies, connecting the three drill rod bodies. The support frame effectively maintains stability between the three drill rod bodies, preventing them from shaking when subjected to external forces, which could affect processing quality.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the support frame can effectively maintain the stability between the three drill rod bodies, but the existence of the support frame will interfere with the drilling process to a certain extent. Summary of the Invention

[0005] In order to ensure the stability between the three drill rods and reduce the interference of the support members on the drilling process, the present application provides a three-axis mixing pile device and a construction method thereof.

[0006] In the first aspect, the present application provides a three-axis mixing pile device adopting the following technical solution:

[0007] A three-axis mixing pile device includes a machine body, three drill rods for drilling holes are provided on the machine body, a drill bit is fixed to the lower end of the drill rod, a spiral blade is provided on the outer wall of the drill rod, a support frame for connecting the three drill rods is provided on the drill rod, a three-way groove for the three drill rods to pass through is provided on the support frame, a rotating cylinder is rotatably connected in the through groove, a spiral groove cooperating with the spiral blade is provided in the rotating cylinder, the rotating cylinder is fixed relative to the support frame, and the rotating cylinder moves up and down with the rotation of the spiral blade, and a positioning mechanism is provided in the support frame to make the rotating cylinder stationary relative to the support frame.

[0008] By adopting the above technical solution, during the drilling process of the drill rod, the staff can act on the corresponding positioning mechanism to make the rotating cylinder stationary relative to the support frame. At this time, the drill rod drives the support frame to move upward during rotation. When it moves to the specified position, the staff again acts on the positioning mechanism to rotate the positioning cylinder relative to the support frame. The positioning cylinder rotates synchronously with the drill rod. At this time, the height of the support frame relative to the drill rod in the vertical direction remains unchanged.

[0009] Optionally, the upper and lower ends of the rotating cylinder are rotatably connected to the support frame through bearings, and the positioning mechanism includes a positioning cylinder fixed in the support frame, and an abutment block for abutting against the outer wall of the corresponding rotating cylinder is fixed on the output shaft of the positioning cylinder.

[0010] By adopting the above technical solution, the staff can act on the positioning cylinder to separate or tighten the abutment block from the positioning cylinder. When the abutment block is pressed against the rotating cylinder, the support frame is stationary relative to the rotating cylinder, and the spiral blade drives the support frame to move up and down during the rotation. When the abutment block is separated from the rotating cylinder, the rotating cylinder rotates synchronously with the drill rod, and the support frame is relatively stationary. At the same time, the rotation direction of different drill rods can be controlled according to the actual mixing needs, and by cooperating with the positioning mechanism, different drill rods can be rotated in different directions.

[0011] Optionally, the spiral blade includes a fixed blade integrally formed on the outer wall of the drill rod, a plurality of notches are provided on the fixed blade, a rotating blade for filling the notches is rotatably connected to the drill rod, a receiving groove for accommodating the rotating blade is provided on the outer wall of the drill rod, and a driving mechanism for driving the rotating blade to rotate is provided in the drill rod.

[0012] By adopting the above technical solution, the spiral blades include fixed blades and rotating blades. When the two are connected together, it is convenient to transport the soil upward. After grouting, the rotating blades are separated from the fixed blades. At this time, during the mixing process, the concrete will not be transported upward or downward, thereby facilitating relatively uniform content in various parts of the concrete.

[0013] Optionally, the driving mechanism includes a driven gear coaxially fixed on the driving gear shaft, several driven gears are evenly distributed at the same height, a driving rack is slidingly arranged in the drill rod, a driving motor is fixed in the drill rod, and a driving gear that drives the driving rack to move is fixed on the output shaft of the driving motor.

[0014] By adopting the above technical solution, the driving motor drives the driving rack to move, the driving rack drives the driving gear to rotate, and the rotating blade fixed on the driving gear shaft rotates in the vertical direction, thereby combining or separating with the fixed blade, making it convenient to use the spiral blade according to actual conditions.

[0015] Optionally, a sliding plate for covering the receiving groove is slidingly provided in the drill rod, a sliding rack is fixed on the sliding plate, a sliding gear engaged with the sliding rack is rotatably connected in the drill rod, and a driving component is provided in the drill rod for driving the sliding plate to cover the receiving groove.

[0016] By adopting the above technical solution, the staff can act on the driving component to move the sliding plate up and down to control the opening and closing of the storage groove and reduce the possibility of soil entering the storage groove.

[0017] Optionally, the driving assembly includes an active rack slidingly arranged in the drill rod, the active rack is fixedly connected to two adjacent driving racks and is located on the same straight line, the active rack is meshed with the sliding gear and drives the sliding gear to rotate, when the rotating blade and the fixed blade form the spiral blade, the sliding plate covers the storage groove.

[0018] By adopting the above technical solution, the driving motor drives the driving rack to move, and at the same time drives the driving gear and the sliding gear to rotate, the rotating blades and the fixed blades are connected as one, the sliding plate closes the storage slot, and when the rotating blades rotate upward, the sliding plate opens the storage slot.

[0019] Optionally, the drill rod and the drill bit are provided with a feed trough along the length direction, the drill rod is rotatably connected to a feed pipe, the machine body is provided with a concrete pump connected to the feed pipe, the concrete pump is provided with a feed pipe connected to the feed pipe, and the drill bit is provided with a switch mechanism for controlling the opening and closing of the feed trough below the drill bit.

[0020] By adopting the above technical solution, during the drilling process, the opening at the lower end of the feed chute is closed under the action of the switch mechanism. When grouting is required into the drilled hole, the switch mechanism is opened to facilitate the outflow of concrete.

[0021] Optionally, the switch mechanism includes a switch plate rotatably connected to the drill bit, the switch plate is provided with a rotating shaft, the switch plate is fixed on the rotating shaft, and a first torsion spring is sleeved on the rotating shaft to pull the switch plate to rotate upward and close the lower end opening of the discharge chute.

[0022] By adopting the above technical solution, under the action of the first torsion spring, the switch plate rotates upward and abuts against the lower end surface of the feed trough to cover the feed trough. At the same time, the soil in the drilled hole pushes the switch plate to move upward, ensuring that the switch plate will not close the lower end opening of the feed trough, preventing soil from entering the drill bit.

[0023] Optionally, the switch plate is a telescopic plate, and a telescopic spring is provided on the telescopic plate to push the inner telescopic plate to move outward. A belt is provided on the telescopic plate to wrap around the telescopic plate. A fixed shaft is connected to the drill bit for rotation. One end of the belt is fixed on the rotating shaft, and the other end of the belt is fixed on the fixed shaft. A second torsion spring is provided on the fixed shaft to keep the belt taut at all times. When the concrete pushes the switch plate to rotate downward, the belt is wound on the fixed shaft under the joint action of the second torsion spring and the concrete.

[0024] By adopting the above technical solution, the concrete pushes the switch plate to rotate. During the downward rotation of the switch plate, the belt is wound on the fixed shaft and the telescopic plate is shortened, which facilitates the discharge of concrete.

[0025] On the other hand, the present application also discloses a construction method using the above-mentioned three-axis mixing pile device, comprising the following steps:

[0026] S1. Install the machine body to the position where it needs to be rotated, and adjust the position of the support frame on the drill rod to ensure the stability of the drill rod;

[0027] S2. During the drilling process, the rotating cylinder is controlled by the positioning mechanism so that the rotating cylinder and the support frame remain relatively stationary. When the drill rod rotates, the support frame is driven to move to a suitable upper position. Then, the positioning mechanism is used to rotate the rotating cylinder along with the rotating rod, so that the position of the support frame relative to the drill rod remains unchanged.

[0028] S3. After the drilling is completed, concrete is poured into the hole to separate the fixed blades from the rotating blades, making it easier to mix the concrete.

[0029] S4. Mix the concrete evenly by controlling the different rotation directions of the drill rod.

[0030] By adopting the above technical solution, the support frame can be adjusted to different positions on the drill rod during operation, which can improve the stability of the drill rod on the one hand and avoid interference of the support frame on the operation of the drill rod on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0032] Figure 2 It is a structural diagram of the positioning mechanism.

[0033] Figure 3 It is a structural diagram of the drive component.

[0034] Figure 4 It is a cross-sectional view of the drill bit.

[0035] Figure 5 It is a schematic diagram of the connection structure of the switch component.

[0036] Explanation of the accompanying reference numerals: 1. Machine body; 2. Drill rod; 3. Mounting frame; 4. Driving screw; 5. Driven gear; 6. Support frame; 7. Rotating cylinder; 8. Positioning cylinder; 9. Abutment block; 10. Fixed blade; 11. Rotating blade; 12. Driving gear; 13. Driving rack; 14. Driving motor; 15. Sliding plate; 16. Sliding rack; 17. Sliding gear; 18. Active rack; 19. Feed chute; 20. Drill bit; 21. Feed pipe; 22. Concrete pump; 23. Feed pipe; 24. Switch plate; 25. Rotating shaft; 26. Belt; 27. Fixed shaft. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-5 This application is described in further detail.

[0038] The embodiment of the present application discloses a three-axis mixing pile device.

[0039] Reference Figure 1 A three-axis mixing pile device includes a body 1, which is provided with three drill rods 2 for drilling holes. The outer wall of the drill rod 2 is provided with a spiral blade. A mounting frame 3 is slidably provided on the body 1. A vertically arranged driving screw 4 is rotatably connected to the body 1. The driving screw 4 vertically penetrates the mounting frame 3 and is threadedly connected to the mounting frame 3. A lifting motor is fixed to the body 1 by bolts. The output shaft of the lifting motor is fixed to the driving screw 4 and drives the driving screw 4 to rotate. The three drill rods 2 are rotatably connected to the mounting frame 3. A motor that drives the three drill rods 2 to rotate is provided on the mounting frame 3. In other embodiments, the three drill rods 2 can also be driven to rotate synchronously or separately by belts, gears, etc.

[0040] Reference Figure 1 and Figure 2 A support frame 6 for connecting three drill rods 2 is provided on the drill rod 2. A three-way groove is provided on the support frame 6 for the three drill rods 2 to pass through. A rotating cylinder 7 is rotatably connected in the groove. The upper and lower ends of the rotating cylinder 7 are connected to the support frame 6 through bearings. A spiral groove that cooperates with the spiral blade is provided in the rotating cylinder 7. When the rotating cylinder 7 is fixed relative to the support frame 6, the rotating cylinder 7 moves up and down with the rotation of the spiral blade. When the rotating cylinder 7 rotates with the support frame 6, the support frame 6 is relatively stationary in the height direction relative to the drill rod 2.

[0041] Reference Figure 1 and Figure 2A positioning mechanism is provided within the support frame 6 to keep the rotating drum 7 stationary relative to the support frame 6. This positioning mechanism comprises a positioning cylinder 8 secured within the support frame 6. An abutment block 9 is secured to the output shaft of the positioning cylinder 8. The abutment block 9 engages the outer wall of the rotating drum 7, facing the surface of the rotating drum 7. Positioning cylinder 8 can be used to position the rotating drum 7 stationary or rotating relative to the support frame 6, facilitating control of the rotational direction of the drill rod 2 according to actual working conditions.

[0042] Reference Figure 2 and Figure 3 The spiral blade includes a fixed blade 10 integrally formed on the outer wall of the drill rod 2. The fixed blade 10 is provided with a plurality of notches, and the lines connecting the plurality of notches are evenly distributed at the same height. The spiral blade also includes a rotating blade 11 rotatably connected to the drill rod 2 and used to fill the notch. The outer wall of the drill rod 2 is provided with a storage groove. The rotating blade 11 is stored in the storage groove during the upward rotation process. A driving mechanism for driving the rotating blade 11 to rotate is provided in the drill rod 2. The driving mechanism includes a driven gear 5 coaxially fixed to the rotating shaft of the driving gear 12. The plurality of driven gears 5 are evenly distributed at the same height. A driving rack 13 is slidingly provided in the drill rod 2. A driving motor 14 is fixed in the drill rod 2. A driving gear 12 that drives the driving rack 13 to move is fixed to the output shaft of the driving motor 14.

[0043] Reference Figure 3 and Figure 4 A sliding plate 15 for covering the receiving groove is slidingly provided in the drill rod 2. A sliding rack 16 is fixed on the sliding plate 15. A sliding gear 17 is rotatably connected in the drill rod 2. The sliding gear 17 meshes with the sliding rack 16. A driving assembly is provided in the drill rod 2 to drive the sliding plate 15 to move and cover the receiving groove. The driving assembly includes an active rack 18 slidingly provided in the drill rod 2. The active rack 18 is fixedly connected to two adjacent driving racks 13, and the active rack 18 and the driving rack 13 are located on the same straight line. The active rack 18 meshes with the sliding gear 17 and drives the sliding gear 17 to rotate. When the rotating blade 11 and the fixed blade 10 form an integrated spiral blade, the sliding plate 15 covers the receiving groove. When the rotating blade 11 rotates upward, the sliding plate 15 also rotates upward, so that the rotating blade 11 can be stored in the receiving groove.

[0044] The rotating blades 11 are stored in the storage groove. At this time, there is a certain gap in the spiral blade. During the mixing process, the spiral blade cannot transport raw materials such as concrete upward or downward, thereby ensuring that each part of the raw materials will not be transported upward or downward when fully mixed, thereby ensuring its uniformity.

[0045] Reference Figure 3 and Figure 4The drill rod 2 and the drill bit 20 are provided with a feed chute 19 along the length direction. The feed chute 19 passes through the drill bit 20 and the drill rod 2 in the length direction. A feed pipe 21 is rotatably connected to the drill rod 2. A concrete pump 22 connected to the feed pipe 21 is provided on the machine body 1. A feeding pipe 23 connected to the feed pipe 21 is provided on the concrete pump 22. Under the action of the concrete pump 22, concrete is delivered from the feed chute 19 to the drill hole.

[0046] Reference Figure 4 and Figure 5 The drill bit 20 is provided with a switch mechanism for controlling the opening and closing of the material chute 19 below the drill bit 20. The switch mechanism includes a switch plate 24 rotatably connected to the drill bit 20. A rotating shaft 25 is fixedly provided on the switch plate 24. The rotating shaft 25 is rotatably connected to the drill bit 20. A first torsion spring is sleeved on the rotating shaft 25. The first torsion spring pulls the switch plate 24 to rotate upward and close the lower end opening of the material chute 19. The switch plate 24 is a telescopic plate, on which a telescopic spring is provided for pushing the inner telescopic plate to move outward, and a belt 26 is provided which surrounds the telescopic plate. A fixed shaft 27 is connected for rotation inside the drill bit 20, and the fixed shaft 27 is parallel to the rotating shaft 25. One end of the belt 26 is fixed on the rotating shaft 25, and the other end of the belt 26 is fixed on the fixed shaft 27. A second torsion spring is provided on the fixed shaft 27 to keep the belt 26 always taut. Under the action of the first torsion spring, the switch plate 24 rotates upward and abuts against the lower opening of the discharge chute 19 to prevent soil from entering the drill bit 20. When the concrete pushes the switch plate 24 to rotate downward, the belt 26 is wound on the fixed shaft 27 under the joint action of the second torsion spring and the concrete.

[0047] The present application also discloses a construction method using the above-mentioned three-axis mixing pile device, comprising the following steps:

[0048] S1. Install the machine body 1 to the position where it needs to be rotated. Use the positioning cylinder 8 to make the rotating cylinder 7 and the support frame 6 relatively stationary. The drill rod 2 rotates and the position relationship of the support frame 6 on the drill rod 2 is adjusted to ensure the working stability of the drill rod 2.

[0049] S2. During the drilling process, the positioning cylinder 8 controls the rotating cylinder 7 so that the rotating cylinder 7 and the support frame 6 remain relatively stationary. During the rotation of the drill rod 2, the support frame 6 is driven to move to a suitable upper position. Then, the positioning cylinder 8 is used to rotate the rotating cylinder 7 along with the rotating rod, so that the position of the support frame 6 relative to the drill rod 2 remains unchanged.

[0050] S3. After the drilling is completed, concrete is poured into the drilled hole by a concrete pump 22 to separate the fixed blades 10 from the rotating blades 11, thereby facilitating the mixing of the concrete.

[0051] S4. The concrete is mixed evenly by controlling the different rotation directions of the drill rod 2.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A three-axis mixing pile device, comprising a body (1), three drill rods (2) for drilling holes are provided on the body (1), a drill bit (20) is fixed to the lower end of the drill rod (2), a spiral blade is provided on the outer wall of the drill rod (2), and a support frame (6) for connecting the three drill rods (2) is provided on the drill rod (2), characterized in that: The support frame (6) is provided with a three-way groove for the three drill rods (2) to pass through, a rotating cylinder (7) is rotatably connected in the three-way groove, a spiral groove cooperating with the spiral blade is provided in the rotating cylinder (7), the rotating cylinder (7) is fixed relative to the support frame (6), the rotating cylinder (7) moves up and down with the rotation of the spiral blade, and a positioning mechanism is provided in the support frame (6) for making the rotating cylinder (7) stationary relative to the support frame (6); the spiral blade includes a fixed blade integrally formed on the outer wall of the drill rod (2) The fixed blade (10) is provided with a plurality of notches, the drill rod (2) is rotatably connected with a rotating blade (11) for filling the notches, the outer wall of the drill rod (2) is provided with a receiving groove for receiving the rotating blade (11), and a driving mechanism for driving the rotating blade (11) to rotate is provided in the drill rod (2); the driving mechanism includes a driven gear (5) coaxially fixed on the rotating shaft of the driving gear (12), and the plurality of driven gears (5) are evenly distributed at the same height. A driving rack (13) is slidingly provided in the drill rod (2), a driving motor (14) is fixed in the drill rod (2), and a driving gear (12) for driving the driving rack (13) is fixed on the output shaft of the driving motor (14); a sliding plate (15) for covering the receiving groove is slidingly provided in the drill rod (2), a sliding rack (16) is fixed on the sliding plate (15), and a sliding gear (17) meshing with the sliding rack (16) is rotatably connected in the drill rod (2), and the drill rod (2) A driving assembly is provided inside the drill rod (2) for driving the sliding plate (15) to cover the receiving groove; the driving assembly includes an active rack (18) slidably provided inside the drill rod (2), the active rack (18) is fixedly connected to two adjacent driving racks (13) and is located on the same straight line, the active rack (18) is meshed with the sliding gear (17) and drives the sliding gear (17) to rotate, when the rotating blade (11) and the fixed blade (10) form the spiral blade, the sliding plate (15) covers the receiving groove.

2. A three-axis mixing pile device according to claim 1, characterized in that: The upper and lower ends of the rotating cylinder (7) are rotatably connected to the support frame (6) through bearings. The positioning mechanism includes a positioning cylinder (8) fixed in the support frame (6). An abutment block (9) for abutting against the outer wall of the corresponding rotating cylinder (7) is fixed on the output shaft of the positioning cylinder (8).

3. A three-axis mixing pile device according to claim 1, characterized in that: The drill rod (2) and the drill bit (20) are provided with a feeding trough (19) along the length direction; a feeding pipe (21) is rotatably connected to the drill rod (2); a concrete pump (22) connected to the feeding pipe (21) is provided on the machine body (1); a feeding pipe (23) connected to the feeding pipe (21) is provided on the concrete pump (22); and a switch mechanism for controlling the opening and closing of the feeding trough (19) below the drill bit (20) is provided on the drill bit (20).

4. A three-axis mixing pile device according to claim 3, characterized in that: The switch mechanism comprises a switch plate (24) rotatably connected to the drill bit (20), a rotating shaft (25) being provided on the switch plate (24), the switch plate (24) being fixed on the rotating shaft (25), and a first torsion spring being sleeved on the rotating shaft (25) for pulling the switch plate (24) to rotate upward and for closing the lower end opening of the feed chute (19).

5. A three-axis mixing pile device according to claim 4, characterized in that: The switch plate (24) is a telescopic plate. A telescopic spring is provided on the telescopic plate to push the inner telescopic plate to move outward. A belt (26) is provided on the telescopic plate and surrounds the telescopic plate. A fixed shaft (27) is rotatably connected inside the drill bit (20). One end of the belt (26) is fixed on the rotating shaft (25), and the other end of the belt (26) is fixed on the fixed shaft (27). A second torsion spring is provided on the fixed shaft (27) to keep the belt (26) always taut. When the concrete pushes the switch plate (24) to rotate downward, the belt (26) is wound on the fixed shaft (27) under the joint action of the second torsion spring and the concrete.

6. A construction method using the triaxial mixing pile device according to claim 5, characterized in that: The following steps are involved: S1. Install the machine body (1) to the position where it needs to be rotated, adjust the position relationship of the support frame (6) on the drill rod (2), and ensure the working stability of the drill rod (2); S2. During the drilling process, the rotating cylinder (7) is controlled by the positioning mechanism so that the rotating cylinder (7) and the support frame (6) remain relatively stationary. When the drill rod (2) is rotating, the support frame (6) is driven to move to a suitable upper position. Then, the positioning mechanism is used to rotate the rotating cylinder (7) along with the drill rod, so that the position of the support frame (6) relative to the drill rod (2) remains unchanged. S3. After the drilling is completed, concrete is poured into the hole to separate the fixed blades (10) from the rotating blades (11) to facilitate the mixing of the concrete; S4. The concrete is mixed evenly by controlling the different rotation directions of the drill rod (2).

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