Drill, expand, clear integrated reverse circulation rotary extrusion expansion branch disc pile machine and construction method

Abstract

The application discloses a drilling, expanding and cleaning integrated reverse circulation rotary extrusion expanding branch pile machine and a construction method, relates to the technical field of branch pile machine equipment, and comprises an inner pipe and an outer pipe, the inner pipe is slidingly installed in the outer pipe, a drill bit is installed at the bottom of the inner pipe, a mud pump is installed at the top of the inner pipe, a bidirectional hydraulic pump is installed on the inner pipe, a lower rotary expanding arm is hinged to the bidirectional hydraulic pump, an upper rotary expanding arm is hinged to the lower rotary expanding arm, the upper rotary expanding arm is hinged to the outer pipe, a lifting hole is formed in the inner pipe, a driving rod is slidingly installed in the lifting hole, a through groove one is formed in the outer wall of the inner pipe, a through groove two is formed in the inner wall of the inner pipe, the through groove one and the through groove two are communicated with the lifting hole, a connecting block is installed in the through groove one, the connecting block is used for connecting the driving rod and a lower piston rod, a lower dredging arm is slidingly installed in the through groove two, one end of the lower dredging arm is hinged to the driving rod, and the other end of the lower dredging arm is hinged to an upper dredging arm, and one end of the upper dredging arm is hinged to the inner wall of the inner pipe. The application has the effect that the inner pipe can be dredged in the pile foundation hole.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of disc pile machine equipment, in particular to a drilling, expanding and cleaning integrated reverse circulation rotary extruding disc pile machine and construction method. BACKGROUND

[0002] The drilling, expanding and cleaning integrated rotary extruding disc pile machine is a special construction machine for disc bored pile, which integrates drilling, expanding force disc, cleaning disc cavity and hole bottom sediment functions, and mainly comprises a moving mechanism, a drill rod, a drill expanding body lifting mechanism, a drill head forward drilling mechanism and a rotating expanding arm expanding mechanism.

[0003] The drilling, expanding and cleaning integrated rotary extruding disc pile machine usually comprises an outer pipe and a hollow inner pipe, the inner pipe is located in the outer pipe, a drill head is installed at the bottom of the inner pipe, and a mud pump is installed at the top of the inner pipe, the mud pump draws and discharges mud at the bottom of the pile foundation to a mud pool outside the pile foundation hole through the inner pipe.

[0004] The inner pipe is not only a carrier of the drill head and the mud pump, but also a channel for the mud pump to draw and discharge mud, in the process of moving upward of the mud through the inner pipe, there is a possibility that the mud is blocked in the inner pipe, at this time, the operator needs to lift the inner pipe to the outside of the pile foundation hole for dredging, which reduces the construction efficiency of the pile foundation drilling and increases the construction cost. SUMMARY

[0005] In order to facilitate dredging of the mud blocked in the inner pipe in the pile foundation hole, on the one hand, the present application provides a drilling, expanding and cleaning integrated reverse circulation rotary extruding disc pile machine, which adopts the following technical scheme:

[0006] The drilling, expanding and cleaning integrated reverse circulation rotary extruding disc pile machine comprises a hollow inner pipe and an outer pipe, the inner pipe is slidably installed in the outer pipe, a drill head is installed at the bottom of the inner pipe, a mud pump is installed at the top of the inner pipe, a bidirectional hydraulic pump is installed on the inner pipe, a lower rotating expanding arm is hinged to the bidirectional hydraulic pump, an upper rotating expanding arm is hinged to the end of the lower rotating expanding arm away from the bidirectional hydraulic pump, the upper rotating expanding arm is hinged to the outer pipe, the upper piston rod of the bidirectional hydraulic pump pushes the outer pipe to make the upper rotating expanding arm and the lower rotating expanding arm spread apart, a lifting hole is vertically formed in the inner pipe, a driving rod is slidably installed in the lifting hole in the vertical direction, a through groove one is formed in the outer wall of the inner pipe, a through groove two is formed in the inner wall of the inner pipe, the through groove one and the through groove two are both communicated with the lifting hole, a connecting block is installed in the through groove one, the connecting block is used for connecting the driving rod and the lower piston rod of the bidirectional hydraulic pump, a lower dredging arm is slidably installed in the through groove two, one end of the lower dredging arm is hinged to the driving rod, the other end of the lower dredging arm is hinged to an upper dredging arm, and one end of the upper dredging arm away from the lower dredging arm is hinged to the inner wall of the inner pipe.

[0007] Through the technical scheme, when the operator needs to expand the diameter at the current depth in the pile hole, the upper piston rod of the bidirectional hydraulic pump is started to move the upper piston rod downward, the outer pipe moves downward under the action of gravity, the upper rotary expansion arm and the lower rotary expansion arm are opened at this time, and the outer pipe and the inner pipe are rotated again, so that the inner wall of the pile hole is cut by the upper rotary expansion arm and the lower rotary expansion arm, thereby achieving the purpose of expanding the diameter.

[0008] When the mud in the inner pipe is blocked, the lower piston rod is started to move the driving rod upward through the connecting block, the upper dredging arm and the lower dredging arm are gradually opened, on the one hand, the blocked mud is moved upward, and on the other hand, the adhesion of the blocked mud to the inner wall of the inner pipe is reduced, thereby facilitating the mud pump to pump the mud in the inner pipe upward. The reciprocating movement of the lower piston rod is repeated, so that a better dredging effect can be achieved. Since the device can dredge the inner pipe in the pile hole, the construction efficiency of the pile drilling is improved.

[0009] In a preferred example, the application can be further configured such that the upper dredging arm and the lower dredging arm are both pointed at the bottom and flat at the top.

[0010] Through the technical scheme, since the top of the upper dredging arm and the lower dredging arm is flat, the flat top of the upper dredging arm and the lower dredging arm can push the blocked mud upward during the opening of the upper dredging arm and the lower dredging arm, thereby facilitating the mud pump to pump the mud in the inner pipe upward.

[0011] In addition, since the upper dredging arm and the lower dredging arm are both pointed at the bottom and flat at the top, the pointed bottom of the upper dredging arm and the lower dredging arm not only facilitates the downward movement of the upper dredging arm and the lower dredging arm, but also cuts the blocked mud in the inner pipe, thereby further facilitating the mud pump to pump the mud in the inner pipe.

[0012] In a preferred example, the application can be further configured such that the inner wall of the inner pipe is provided with a rotating groove, a pushing block is rotatably installed in the rotating groove, the side of the pushing block away from the inner wall of the inner pipe is arc-shaped, and the pushing block and the rotating groove are matched with each other.

[0013] Through the technical scheme, when the mud in the inner pipe is blocked, the operator can rotate the pushing block to rotate the lower half of the pushing block toward the center of the inner pipe, so that the lower half of the pushing block pushes the mud in the inner pipe upward, thereby further facilitating the mud pump to pump the mud in the inner pipe.

[0014] The application can be further configured in a preferred example that, after the upper dredging arm and the lower dredging arm are spread, the projection length of the upper dredging arm and the lower dredging arm in the horizontal direction is greater than the inner diameter of the inner tube, and the movement track of the hinge joint of the upper dredging arm and the lower dredging arm can pass through the upper half of the rotating groove.

[0015] Through the above technical solution, in the process of spreading the upper dredging arm and the lower dredging arm, the hinged end of the two can gradually move towards the rotating groove, and after the hinged end contacts the upper half of the boost block, the lower half of the boost block can be rotated to the center of the inner tube, thereby the boost block can play the effect of pushing the mud.

[0016] The application can be further configured in a preferred example that, a limiting block is installed on the arc-shaped side wall of the boost block, and a limiting groove is arranged on the inner wall of the rotating groove, and the limiting block is slidingly arranged in the limiting groove.

[0017] Through the above technical solution, the boost block is limited by the limiting block, thereby reducing the possibility of excessive overturning of the boost block.

[0018] The application can be further configured in a preferred example that, a spring is installed between the side wall of the limiting block and the inner wall of the limiting groove, one end of the spring is fixedly connected to the limiting block, and the other end of the spring is fixedly connected to the inner wall of the limiting groove.

[0019] Through the above technical solution, in the process of lifting the upper dredging arm and the lower dredging arm by the lower piston rod, the hinged end of the upper dredging arm and the lower dredging arm pushes the boost block to overturn, so that the spring is in a stretched state; in the process of folding the upper dredging arm and the lower dredging arm by the lower piston rod, after the hinged end of the upper dredging arm and the lower dredging arm leaves the boost block, the boost block can be rotated back into the rotating groove under the elastic force of the spring.

[0020] The application can be further configured in a preferred example that, a guide hole is arranged on the inner wall of the limiting groove, a guide rod is slidingly installed in the guide hole, one end of the guide rod is fixedly connected to the limiting block, and the spring is sleeved on the guide rod.

[0021] Through the above technical solution, in the process of stretching and restoring the original length of the spring, since the spring is sleeved on the guide rod, the possibility of bending of the spring is reduced, thereby the service life of the spring can be prolonged.

[0022] The application can be further configured in a preferred example that, a reinforcing groove is arranged on the side wall of the boost block close to the inner wall of the inner tube, and a reinforcing plate is installed in the reinforcing groove.

[0023] Through the technical scheme, the reinforcing plate in the groove can be made of high-hardness alloy material, and the end portions of the upper and lower dredging arms are in contact with the reinforcing plate, so that the pressure is not directly applied to the boosting block, thereby reducing the possibility of deformation of the boosting block under pressure.

[0024] In another aspect, the application provides a drilling, expanding and cleaning integrated reverse circulation rotary pile machine construction method, which adopts the following technical scheme.

[0025] The drilling, expanding and cleaning integrated reverse circulation rotary pile machine construction method needs to dredge the inner tube when mud blocking occurs in the inner tube, and includes the following steps:

[0026] S1, stopping the rotation of the drill bit to stop the production of hole bottom sediment;

[0027] S2, starting the bidirectional hydraulic pump to move the lower piston rod upward, the lower piston rod drives the driving rod to move upward, so that the upper and lower dredging arms are unfolded in the inner tube to dredge the blocked mud in the inner tube;

[0028] S3, starting the bidirectional hydraulic pump while starting the mud pump to extract the mud in the inner tube;

[0029] S4, after the inner tube is dredged, the lower piston rod of the bidirectional hydraulic pump is controlled to move downward, the lower piston rod drives the driving rod to move downward, and the upper and lower dredging arms are retracted to reduce the interference of the upper and lower dredging arms on the operation of the mud pump;

[0030] S4, the rotation of the drill bit is restored, and the pile drilling operation is resumed.

[0031] Through the above technical scheme, when the mud in the inner tube is blocked, the lower piston rod drives the driving rod to move upward through the connecting block, and the upper and lower dredging arms are gradually expanded, which not only drives the blocked mud to move upward, but also reduces the adhesion of the blocked mud on the inner wall of the inner tube, thereby facilitating the mud pump to extract the mud in the inner tube upward.

[0032] In summary, the application has the following beneficial technical effects:

[0033] 1. When the mud in the inner tube is blocked, the operator gradually expands the upper and lower dredging arms, which not only drives the blocked mud to move upward, but also reduces the adhesion of the blocked mud on the inner wall of the inner tube, thereby facilitating the mud pump to extract the mud in the inner tube upward;

[0034] 2. Since the bottoms of both the upper and lower unclogging arms are pointed, during the retraction of the upper and lower unclogging arms, the unclogging arms can cut the slurry blocking the inner pipe, thereby further facilitating the pump to pump out the slurry from the inner pipe.

[0035] 3. During the opening process of the upper and lower dredging arms, the hinged ends of the two arms can push the booster block to rotate, causing the lower half of the booster block to rotate towards the center of the inner pipe, thereby enabling the booster block to push the mud. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application, mainly illustrating the structure of the outer tube, inner tube, bidirectional hydraulic pump, upper rotary expander, and lower rotary expander.

[0037] Figure 2 yes Figure 1 The cross-sectional view along the AA direction mainly illustrates the structure of the lifting hole and the drive rod.

[0038] Figure 3 yes Figure 2 The enlarged schematic diagram of section B mainly illustrates the structure of the connecting block, through slot one, and through slot two.

[0039] Figure 4 This is a partial structural diagram of an embodiment of this application, mainly illustrating the structure of the upper and lower unclogging arms.

[0040] Figure 5 yes Figure 4 Another structural diagram shows the structure of the top and bottom of the upper and lower unblocking arms.

[0041] Figure 6 yes Figure 2 The enlarged schematic diagram of section C mainly illustrates the structure of the booster block, limit block, spring, and reinforcing plate.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1. Inner tube; 101. Drill bit; 11. Lifting hole; 111. Drive rod; 12. Through slot one; 121. Connecting block; 13. Through slot two; 14. Rotating slot; 15. Limiting slot; 16. Guide hole; 2. Outer tube; 3. Two-way hydraulic pump; 31. Upper piston rod; 32. Lower piston rod; 41. Lower rotating expanding arm; 42. Upper rotating expanding arm; 51. Lower unblocking arm; 52. Upper unblocking arm; 6. Pushing block; 61. Limiting block; 62. Spring; 63. Guide rod; 64. Reinforcing slot; 65. Reinforcing plate; 66. Bolt. Detailed Implementation

[0044] The following is in conjunction with the appendix Figure 1 -AppendixFigure 6 The application is further described in detail.

[0045] The application discloses a drill, expand, and clean integrated reverse circulation rotary extrusion expansion support disc pile machine. Referring to Figure 1 The drill, expand, and clean integrated reverse circulation rotary extrusion expansion support disc pile machine includes a hollow inner tube 1 and an outer tube 2. The inner tube 1 is vertically slidingly installed in the outer tube 2. The outer wall of the inner tube 1 and the inner wall of the outer tube 2 are in close contact with each other. A mud pump (not shown in the figure) is installed at the top of the inner tube 1. A drill bit 101 is installed at the bottom of the inner tube 1. There is a gap between the drill bit 101 and the bottom of the inner tube 1, which facilitates the mud pump to pump mud.

[0046] Referring to Figure 1 A bidirectional hydraulic pump 3 is installed on the inner tube 1. The bidirectional hydraulic pump 3 is located directly below the outer tube 2. Two lower rotary expansion arms 41 are hingedly connected to the bidirectional hydraulic pump 3. The two lower rotary expansion arms 41 are symmetrical to each other. An upper rotary expansion arm 42 is hingedly connected to the end of each lower rotary expansion arm 41 away from the bidirectional hydraulic pump 3. Each upper rotary expansion arm 42 is hingedly connected to the outer tube 2 at the end away from the lower rotary expansion arm 41. The upper piston rod 31 of the bidirectional hydraulic pump 3 pushes the outer tube 2 to expand the upper rotary expansion arm 42 and the lower rotary expansion arm 41. The rotating upper rotary expansion arm 42 and the lower rotary expansion arm 41 can cut the inner wall of the pile foundation to expand the hole diameter.

[0047] Referring to Figure 2 and Figure 3 A lifting hole 11 is vertically formed in the inner tube 1. A driving rod 111 is vertically slidingly installed in the lifting hole 11. A through slot one 12 is formed in the outer wall of the inner tube 1. A through slot two 13 is formed in the inner wall of the inner tube 1. The through slot one 12 and the through slot two 13 are both connected to the lifting hole 11. A connecting block 121 is vertically slidingly installed in the through slot one 12. The connecting block 121 is used to connect the driving rod 111 and the lower piston rod 32 of the bidirectional hydraulic pump 3. A lower dredging arm 51 is slidingly installed in the through slot two 13. One end of the lower dredging arm 51 is hingedly connected to the driving rod 111. The other end of the lower dredging arm 51 is hingedly connected to an upper dredging arm 52. The end of the upper dredging arm 52 away from the lower dredging arm 51 is hingedly connected to the inner wall of the inner tube 1. The upper dredging arm 52 and the lower dredging arm 51 form a set of dredging arms. A plurality of sets of dredging arms are provided in the inner tube 1. The plurality of sets of dredging arms are uniformly arranged in the inner tube 1 in the vertical direction.

[0048] When the mud in the inner tube 1 is blocked, the operator starts the bidirectional hydraulic pump 3. The lower piston rod 32 drives the driving rod 111 to move upward through the connecting block 121. The upper dredging arm 52 and the lower dredging arm 51 gradually expand. Not only can they drive the blocked mud to move upward, but also can reduce the adhesion of the blocked mud to the inner wall of the inner tube 1, thereby facilitating the mud pump to pump the mud in the inner tube 1 upward. Since the device can dredge the inner tube in the pile hole, the construction efficiency of the pile drilling is improved

[0049] Referring to Figure 2 , Figure 4 and Figure 5 , the upper and lower dredging arms 52 and 51 are pointed at the bottom, and during the retraction of the upper and lower dredging arms 52 and 51, the pointed bottom of the upper and lower dredging arms 52 and 51 not only facilitates the downward movement of the upper and lower dredging arms 52 and 51, but also cuts the blocked mud in the inner tube 1, facilitating the mud pump to pump out the mud in the inner tube 1.

[0050] The upper and lower dredging arms 52 and 51 are flat at the top, and during the opening of the upper and lower dredging arms 52 and 51, the flat top of the upper and lower dredging arms 52 and 51 can push the blocked mud to move upward, thereby further facilitating the mud pump to pump out the mud in the inner tube 1.

[0051] Referring to Figure 2 and Figure 6 , the inner wall of the inner tube 1 is provided with two circular arc-shaped rotating grooves 14, and the two rotating grooves 14 and the two groups of dredging arms are one-to-one correspondingly arranged. Since the two rotating grooves 14 are consistent in structure, and the structures inside the two rotating grooves 14 are also consistent, only one rotating groove 14 and the structure inside the rotating groove 14 will be described below.

[0052] A push block 6 is rotatably installed in the rotating groove 14, and the push block 6 is semicircular in vertical cross-section. The side of the push block 6 away from the inner wall of the inner tube 1 is arc-shaped, and the push block 6 and the rotating groove 14 are matched with each other. After the upper and lower dredging arms 52 and 51 are opened, the projection length of the upper and lower dredging arms 52 and 51 in the horizontal direction is greater than the inner diameter of the inner tube 1, and the movement trajectory of the hinge point of the upper and lower dredging arms 52 and 51 can pass through the upper half of the rotating groove 14, and the highest point of the movement trajectory of the hinge point of the upper and lower dredging arms 52 and 51 is lower than the highest point of the rotating groove 14.

[0053] During the opening of the upper and lower dredging arms 52 and 51, the hinged ends of the upper and lower dredging arms 52 and 51 can gradually move towards the rotating groove 14. After the hinged ends contact the upper half of the push block 6, the lower half of the push block 6 rotates towards the center of the inner tube 1, which can make the lower half of the push block 6 push the mud in the inner tube 1 to move upward, thereby further facilitating the mud pump to pump out the mud in the inner tube 1.

[0054] Referring to Figure 2 and Figure 6As shown, the arc-shaped side wall of the boost block 6 is provided with a limiting block 61, and the inner wall of the rotating groove 14 is provided with a limiting groove 15. The vertical cross-sections of the limiting block 61 and the limiting groove 15 are both fan-shaped. The limiting block 61 is slidingly installed in the limiting groove 15. The boost block 6 is limited by the limiting block 61, thereby reducing the possibility of excessive overturning of the boost block 6.

[0055] Referring to Figure 2 and Figure 6 As shown, the arc-shaped spring 62 is installed between the side wall of the limiting block 61 and the inner wall of the limiting groove 15. One end of the spring 62 is fixedly connected to the limiting block 61, and the other end of the spring 62 is fixedly connected to the inner wall of the limiting groove 15. The inner wall of the limiting groove 15 is provided with an arc-shaped guide hole 16, and the arc-shaped guide rod 63 is slidingly installed in the guide hole 16. One end of the guide rod 63 is fixedly connected to the limiting block 61, and the spring 62 is sleeved on the guide rod 63. The curvatures of the guide rod 63, the guide hole 16 and the spring 62 are equal.

[0056] In the process of lifting the upper and lower dredging arms 52 and 51 by the lower piston rod 32, the hinged end of the upper and lower dredging arms 52 and 51 pushes the boost block 6 to overturn, so that the spring 62 is in a stretched state. In the process of folding the upper and lower dredging arms 52 and 51 by the lower piston rod 32, after the hinged end of the upper and lower dredging arms 52 and 51 is away from the boost block 6, the boost block 6 can be rotated into the rotating groove 14 under the elastic force of the spring 62. In addition, since the spring 62 is sleeved on the guide rod 63, the possibility of bending of the spring 62 is reduced, thereby prolonging the service life of the spring 62.

[0057] Referring to Figure 2 and Figure 6 As shown, the side wall of the boost block 6 close to the inner wall of the inner tube 1 is provided with a reinforcing groove 64, and the reinforcing plate 65 is detachably installed in the reinforcing groove 64 through the bolt 66. The reinforcing plate 65 is made of high-hardness alloy material. The hinged end of the upper and lower dredging arms 52 and 51 contacts the reinforcing plate 65, so as to avoid the pressure directly acting on the boost block 6, thereby reducing the possibility of deformation of the boost block 6.

[0058] The drilling, expanding and dredging integrated reverse circulation rotary expanding support disc pile machine construction method disclosed by the embodiment of the application can dredge the inner tube 1 when the mud in the inner tube 1 is blocked, and includes the following steps.

[0059] S1, stopping the rotation of the drill bit 101 to stop the production of hole bottom sediment;

[0060] S2, start the bidirectional hydraulic pump 3, so that the lower piston rod 32 moves upward, the lower piston rod 32 drives the driving rod 111 to move upward, so that the upper dredging arm 52 and the lower dredging arm 51 are unfolded in the inner tube 1, and the blocked mud in the inner tube 1 is dredged;

[0061] S3, start the mud pump while starting the bidirectional hydraulic pump 3, and the mud in the inner tube 1 is pumped out;

[0062] S4, after the inner tube 1 is dredged, the lower piston rod 32 of the bidirectional hydraulic pump 3 is controlled to move downward, the lower piston rod 32 drives the driving rod 111 to move downward, the upper dredging arm 52 and the lower dredging arm 51 are retracted, and the interference of the upper dredging arm 52 and the lower dredging arm 51 on the operation of the mud pump is reduced;

[0063] S4, the drill bit 101 is restored to rotate, and the pile foundation drilling operation is restored.

[0064] The embodiments of the specific implementation are the preferred embodiments of the application, and do not limit the protection scope of the application in sequence, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A construction method for an integrated drilling, reaming, and cleaning reverse circulation rotary extrusion and expansion slab pile machine, comprising an integrated drilling, reaming, and cleaning reverse circulation rotary extrusion and expansion slab pile machine, wherein the integrated drilling, reaming, and cleaning reverse circulation rotary extrusion and expansion slab pile machine comprises a hollow inner tube (1) and an outer tube (2), wherein the inner tube (1) is slidably installed inside the outer tube (2), wherein a drill bit (101) is installed at the bottom of the inner tube (1), and a mud pump is installed at the top of the inner tube (1), characterized in that: The inner tube (1) is provided with a bidirectional hydraulic pump (3), the lower rotary expansion arm (41) is hinged to the bidirectional hydraulic pump (3), the upper rotary expansion arm (42) is hinged to the lower rotary expansion arm (41) away from the bidirectional hydraulic pump (3), the upper rotary expansion arm (42) is hinged to the outer tube (2), the upper piston rod (31) of the bidirectional hydraulic pump (3) pushes the outer tube (2) to make the upper rotary expansion arm (42) and the lower rotary expansion arm (41) spread, the lifting hole (11) is vertically formed in the inner tube (1), the driving rod (111) is vertically and slidingly installed in the lifting hole (11), the outer wall of the inner tube (1) is provided with the through slot one (12), the inner wall of the inner tube (1) is provided with the through slot two (13), the through slot one (12) and the through slot two (13) are communicated with the lifting hole (11), the connecting block (121) is installed in the through slot one (12), the connecting block (121) is used for connecting the driving rod (111) and the lower piston rod (32) of the bidirectional hydraulic pump (3), the lower dredging arm (51) is slidingly installed in the through slot two (13), one end of the lower dredging arm (51) is hinged to the driving rod (111), the other end of the lower dredging arm (51) is hinged to the upper dredging arm (52), the upper dredging arm (52) is hinged to the inner wall of the inner tube (1) away from the lower dredging arm (51); The construction method comprises a dredging step when mud blocking occurs in the inner tube (1): S1, stop the drill bit (101) from rotating to stop the production of hole bottom sediment; S2, start the bidirectional hydraulic pump (3), so that the lower piston rod (32) moves upward, the lower piston rod (32) drives the driving rod (111) to move upward, so that the upper dredging arm (52) and the lower dredging arm (51) are unfolded in the inner tube (1), and the blocked mud in the inner tube (1) is dredged; S3, start the bidirectional hydraulic pump (3) at the same time, start the mud pump to extract the mud in the inner tube (1); S4, after the inner tube (1) is dredged, control the lower piston rod (32) of the bidirectional hydraulic pump (3) to move downward, the lower piston rod (32) drives the driving rod (111) to move downward, and the upper dredging arm (52) and the lower dredging arm (51) are retracted; S5, restore the rotation of the drill bit (101) to restore the pile foundation drilling operation.

2. The integrated drill, ream, clean, reverse circulation rotary ream and flighted pile machine construction method of claim 1, wherein: The bottom of the upper dredging arm (52) and the lower dredging arm (51) is pointed, and the top of the upper dredging arm (52) and the lower dredging arm (51) is planar.

3. The integrated drill, ream, clean, reverse circulation rotary ream and flight auger pile machine construction method of claim 2, wherein: The inner wall of the inner tube (1) is provided with a rotating groove (14), the push assisting block (6) is rotatingly installed in the rotating groove (14), the side of the push assisting block (6) away from the inner wall of the inner tube (1) is arc-shaped, and the push assisting block (6) and the rotating groove (14) are matched with each other.

4. The integrated drill, ream, clean, reverse circulation rotary ream and flight auger pile machine construction method of claim 3, wherein: After the upper dredging arm (52) and the lower dredging arm (51) are pried open, the projection length of the upper dredging arm (52) and the lower dredging arm (51) in the horizontal direction is greater than the inner diameter of the inner tube (1), and the movement track of the hinge point of the upper dredging arm (52) and the lower dredging arm (51) can pass through the upper half of the rotating groove (14).

5. The integrated drill, ream, clean, reverse circulation rotary ream and flight auger pile machine construction method of claim 4, wherein: A limiting block (61) is mounted on the arc-shaped side wall of the boost block (6), an inner wall of the rotating groove (14) is provided with a limiting groove (15), and the limiting block (61) is slidingly arranged in the limiting groove (15).

6. The integrated drill, ream, clean, reverse circulation rotary ream and flight auger pile machine construction method according to claim 5, wherein: A spring (62) is mounted between the side wall of the limiting block (61) and the inner wall of the limiting groove (15), one end of the spring (62) is fixedly connected to the limiting block (61), and the other end of the spring (62) is fixedly connected to the inner wall of the limiting groove (15).

7. The integrated drill, ream, clean, reverse circulation rotary ream and flight auger pile machine construction method of claim 6, wherein: The inner wall of the limiting groove (15) is provided with a guide hole (16), a guide rod (63) is slidingly arranged in the guide hole (16), one end of the guide rod (63) is fixedly connected to the limiting block (61), and the spring (62) is sleeved on the guide rod (63).

8. The integrated drill, ream, clean, reverse circulation rotary ream and flight auger pile machine construction method according to claim 7, wherein: The side wall of the boost block (6) close to the inner wall of the inner tube (1) is provided with a reinforcing groove (64), and the reinforcing groove (64) is provided with a reinforcing plate (65).

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