Multi-axis hole-forming pile improved construction equipment and construction method thereof

Abstract

The invention relates to the technical field of building pile foundation laying, and provides multi-shaft hole-forming pile improved construction equipment and a construction method thereof.The equipment comprises a tracked vehicle body, a mounting plate is rotationally mounted on the front side of the top wall of the tracked vehicle body, and a first hydraulic cylinder is rotationally mounted between the mounting plate and the tracked vehicle body; the mounting shell is slidably mounted on the mounting plate, and a lifting assembly for driving the mounting shell to ascend and descend is mounted in the top end of the mounting plate; by means of the technical scheme, the problems that in the prior art, hole-forming pile construction equipment can only conduct independent drilling operation during use, when a large number of hole-forming piles need to be arranged, existing hole-forming pile construction equipment cannot meet the construction efficiency requirement, and meanwhile after the existing hole-forming pile construction equipment completes drilling, the construction efficiency of the existing hole-forming pile construction equipment cannot be met are solved. The hole wall is prone to collapse when the reinforcement cage is placed, secondary hole cleaning is needed, and the construction efficiency is affected.

Description

Technical Field

[0001] The invention relates to the technical field of building pile foundation laying, and in particular to improved construction equipment for multi-axis bored piles and a construction method thereof. Background Art

[0002] Bored piles are piles that are formed by mechanically or other means in the foundation soil, and then a steel cage is placed in the hole and concrete is poured. There are many different methods for the construction of bored piles, including rotary drilling, rotary drilling, impact drilling, and full casing drilling. These methods are suitable for different soil and rock conditions and can be selected according to the specific construction environment and cost.

[0003] However, the existing bored pile construction equipment can only perform a single drilling operation when in use. When a large number of bored piles need to be set up, the existing bored pile construction equipment is difficult to meet its construction efficiency. At the same time, after the existing bored pile construction equipment completes the drilling, the hole wall is prone to collapse when the steel cage is placed, and a secondary hole cleaning is required, which affects the construction efficiency. Summary of the invention

[0004] The present invention proposes an improved multi-axis bored pile construction equipment and a construction method thereof, which solves the problem that the existing bored pile construction equipment in the related art can only perform a single drilling operation when in use. When a large number of bored piles need to be set up, the existing bored pile construction equipment is difficult to meet its construction efficiency. At the same time, after the existing bored pile construction equipment completes the drilling, the hole wall is prone to collapse when the steel cage is placed, and a secondary hole cleaning is required, which affects the construction efficiency.

[0005] The technical solution of the present invention is as follows: An improved multi-axis bored pile construction device, comprising: A crawler body, a mounting plate is rotatably mounted on the front side of the top wall of the crawler body, and a first hydraulic cylinder is rotatably mounted between the mounting plate and the crawler body; A mounting shell, the mounting shell is slidably mounted on the mounting plate, and a lifting component for driving the mounting shell to rise and fall is installed inside the top of the mounting plate; A soil drilling assembly is symmetrically mounted at the bottom of the mounting shell, a driving assembly for driving the soil drilling assembly is mounted in the mounting shell, a tamping mechanism is evenly mounted on the outer wall of the soil drilling assembly, and a drill bit is mounted at the bottom end of the soil drilling assembly.

[0006] Preferably, three sliders are symmetrically fixed to the rear wall of the mounting shell, and a sliding groove matching the slider is opened on the front wall of the mounting plate. The slider is slidably installed in the sliding groove, and threaded rods are rotatably installed in the sliding grooves on both sides. The threaded rods are screwed and pass through the corresponding sliders. A guide shaft is fixed in the sliding groove in the middle, and the guide shaft slides through the corresponding slider.

[0007] Preferably, a mounting groove is provided inside the top of the mounting plate, and the lifting assembly is installed in the mounting groove.

[0008] Preferably, the lifting assembly comprises a mounting shaft, the mounting shaft is rotatably mounted between the inner walls of the mounting groove, and worms are fixed on the shaft bodies at both ends of the mounting shaft; The worms are all meshedly connected with a worm wheel, and the top end of the threaded rod passes through the bottom wall of the mounting groove through a bearing and is fixedly connected to the corresponding bottom axis position of the worm wheel; A first motor is fixed on the top of the side wall of the mounting plate, and a power shaft of the first motor passes through the side wall of the mounting groove through a bearing and is fixedly connected to one end of the mounting shaft.

[0009] Preferably, the driving assembly comprises a scissor rod, the scissor rod is installed in the installation shell, and a driving gear is rotatably installed at the top of the middle node position of the scissor rod through a bearing; A same linkage gear is meshed between two adjacent driving gears, and the linkage gear is rotatably mounted at the outer node position of the scissor rod; The bottom end of the middle node position of the scissor rod is rotatably mounted with an I-shaped block through a bearing; The bottom wall of the installation shell is provided with a limit slot corresponding to the position of the I-shaped block, the I-shaped block on the left is fixed at the leftmost end of the limit slot, and the remaining I-shaped blocks are slidably installed in the limit slot; A second motor is fixed to the top wall of the installation shell, a power shaft of the second motor passes through the top wall of the installation shell through a bearing and is fixed with a driving gear, and the driving gear is meshed and connected to the leftmost driving gear; A second hydraulic cylinder is fixed to the right wall of the installation shell, and a movable end of the second hydraulic cylinder slides through the right wall of the installation shell and is fixed with a mounting block, and the mounting block is fixed on the top wall of the rightmost I-shaped block.

[0010] Preferably, the soil drilling assembly comprises a mounting tube, the mounting tube is fixed to the bottom end of the I-shaped block, and a drill rod is rotatably mounted in the mounting tube; The top end of the drill rod passes through the I-shaped block and the scissor rod through a bearing and is fixedly connected to the driving gear, and an auger blade is fixed on the outer wall of the drill rod; The auger blades are in contact with the inner wall of the mounting tube.

[0011] Preferably, the drill bit is fixed at the bottom end of the drill rod, and a plurality of inclined feed slots are symmetrically provided on the drill bit.

[0012] Preferably, the outer wall of the installation tube is arranged in a stepped shape, and the outer diameter of the bottom of the installation tube is smaller than the outer diameter of the top thereof, and a slag discharge pipe is fixedly connected to the top of the front side of the installation tube.

[0013] Preferably, the wall tamping mechanism comprises a sliding block, the sliding block slides through the side wall of the mounting tube, an arc-shaped tamping plate is fixed to one end of the sliding block located outside the mounting tube, a limiting plate is fixed to the outer wall of the sliding block, and a limiting groove is provided on the wall of the mounting tube corresponding to the position of the limiting plate; The limiting plate is slidably installed in the limiting groove, and a spring is fixed between the side wall of the limiting plate and the side wall of the limiting groove; The spring is sleeved outside the sliding block.

[0014] A construction method for improving construction equipment of multi-axis bored piles comprises the following steps: Step 1: Drive the crawler vehicle body to the drilling position, and control the first hydraulic cylinder to extend so that the mounting plate is in a vertical state; Step 2: adjusting the position between adjacent soil drilling assemblies according to the distance between adjacent boreholes, and adjusting the position between the I-shaped blocks by the second hydraulic cylinder in the drive assembly, so that the drill bit at the bottom of the soil drilling assembly is aligned with the center position of the current borehole; Step three: turn on the second motor in the driving assembly, the second motor drives the drilling assembly to work, and at the same time, the lifting assembly is set to cooperate with the threaded rod and the slider to drive the drilling assembly to move down to perform the drilling operation. During the drilling process, the auger blades in the drilling assembly will intermittently squeeze the tamping mechanism, so that the tamping mechanism continuously tamps the inner wall of the borehole. At the same time, the outer wall of the mounting tube is arranged in a stepped shape, and the tamping mechanism can tamp the inner wall of the borehole multiple times, and the auger blades can discharge the soil and gravel produced by the drilling through the slag discharge pipe on the mounting tube, thereby completing the drilling operation.

[0015] The beneficial effects of the present invention are: 1. The lifting assembly provided in the present invention is used to control the lifting of the drilling assembly, so that the drilling assembly can drill holes downwards. The drilling assembly provided can perform drilling operations and discharge the soil and gravel generated by drilling. The driving assembly provided can control the drilling assembly to work and adjust the positions between adjacent drilling assemblies, so as to realize drilling holes in multiple positions at the same time, thereby improving work efficiency.

[0016] 2. The wall tamping mechanism provided in the present invention can continuously tamp the hole wall during the drilling process, thereby effectively avoiding the hole wall collapse during the lowering of the steel cage, reducing the workload of secondary hole cleaning, and accelerating the construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 It is a three-dimensional diagram of the external structure of the present invention; Figure 2 This is a three-dimensional diagram of the front structure of the mounting plate of the present invention; Figure 3 It is a three-dimensional diagram of the lifting assembly structure of the present invention; Figure 4 A three-dimensional diagram of the internal structure of the installation shell of the present invention; Figure 5 It is a three-dimensional diagram of the local structure of the driving assembly of the present invention; Figure 6 A three-dimensional diagram of the external structure of the soil drilling assembly of the present invention; Figure 7 A three-dimensional diagram of the structure of the soil drilling assembly of the present invention in a separated state; Figure 8 This is a three-dimensional diagram of the drill bit structure of the present invention; Fig. 9 It is a cross-sectional view of the installation tube of the present invention; Fig.10 For the present invention Fig. 9 Enlarged schematic diagram at point A in the middle.

[0019] In the figure: 1. crawler body; 2. mounting plate; 3. first hydraulic cylinder; 4. lifting assembly; 41. mounting shaft; 42. worm; 43. worm wheel; 44. first motor; 5. mounting shell; 6. drilling assembly; 61. mounting cylinder; 62. drill rod; 63. auger blade; 7. driving assembly; 71. scissor rod; 72. driving gear; 73. linkage gear; 74. I-block; 75. driving gear; 76. second motor; 77. second hydraulic cylinder; 78. mounting block; 8. ramming mechanism; 81. sliding block; 82. arc ramming plate; 83. limit plate; 84. spring; 9. drill bit; 10. slider; 11. slide groove; 12. threaded rod; 13. guide shaft; 14. mounting groove; 15. feed groove; 16. limit groove. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0021] Example 1 like Figure 1~Figure 2 As shown, this embodiment proposes: An improved multi-axis bored pile construction device, comprising: A crawler body 1, a mounting plate 2 is rotatably mounted on the front side of the top wall of the crawler body 1, and a first hydraulic cylinder 3 is rotatably mounted between the mounting plate 2 and the crawler body 1; A mounting shell 5, the mounting shell 5 is slidably mounted on the mounting plate 2, and a lifting assembly 4 for driving the mounting shell 5 to rise and fall is installed inside the top of the mounting plate 2; The soil drilling assembly 6 is symmetrically installed at the bottom of the installation shell 5. A driving assembly 7 for driving the soil drilling assembly 6 is installed in the installation shell 5. The outer wall of the soil drilling assembly 6 is evenly installed with a tamping mechanism 8. The bottom end of the soil drilling assembly 6 is installed with a drill bit 9.

[0022] In this embodiment, the crawler vehicle body 1 is provided to facilitate the movement of the entire device. The first hydraulic cylinder 3 is provided to control the state of the mounting plate 2. When the device is not needed, the first hydraulic cylinder 3 is in a retracted state, and the mounting plate 2 is in an inclined state (close to a horizontal state). When the device is working, the first hydraulic cylinder 3 is extended, so that the mounting plate 2 is in a vertical state. The lifting assembly 4 is provided to control the lifting of the soil drilling assembly 6, so that the soil drilling assembly 6 can drill downwards. The soil drilling assembly 6 can perform a drilling operation and discharge the soil and gravel generated by drilling. The driving assembly 7 is provided to control the soil drilling assembly 6 to work and adjust the position between adjacent soil drilling assemblies 6, so as to achieve simultaneous drilling of holes in multiple positions, thereby improving work efficiency. The wall tamping mechanism 8 is provided to continuously tamp the hole wall during the drilling process, so as to effectively avoid the collapse of the hole wall during the process of lowering the steel cage, reduce the workload of secondary hole cleaning, and speed up the construction progress. The drill bit 9 is provided to cooperate with the soil drilling assembly 6 to directly introduce the drilled soil and gravel into the soil drilling assembly 6.

[0023] Example 2 like Figure 2~Figure 3 As shown, based on the same concept as the above-mentioned embodiment 1, this embodiment further proposes: Three sliders 10 are symmetrically fixed to the rear wall of the mounting shell 5, and a slide groove 11 matching the slider 10 is opened on the front wall of the mounting plate 2. The slider 10 is slidably installed in the slide groove 11, and threaded rods 12 are rotatably installed in the slide grooves 11 on both sides. The threaded rods 12 are screwed and penetrate the corresponding sliders 10. A guide shaft 13 is fixed in the slide groove 11 in the middle, and the guide shaft 13 slides and penetrates the corresponding slider 10.

[0024] A mounting groove 14 is formed inside the top of the mounting plate 2 , and the lifting assembly 4 is mounted in the mounting groove 14 .

[0025] The lifting assembly 4 includes a mounting shaft 41, which is rotatably mounted between the inner walls of the mounting groove 14, and a worm 42 is fixed to the shaft body at both ends of the mounting shaft 41; The worm 42 is meshedly connected with a worm wheel 43, and the top of the threaded rod 12 passes through the bottom wall of the mounting groove 14 through a bearing and is fixedly connected to the corresponding bottom axis position of the worm wheel 43; A first motor 44 is fixed to the top of the side wall of the mounting plate 2 . The power shaft of the first motor 44 passes through the side wall of the mounting groove 14 through a bearing and is fixedly connected to one end of the mounting shaft 41 .

[0026] In this embodiment, the lifting assembly 4 is used to control the lifting of the soil drilling assembly 6, so that the soil drilling assembly 6 can drill downward. When the lifting assembly 4 is working, the first motor 44 is controlled to work, and the first motor 44 drives the installation shaft 41 to rotate. The installation shaft 41 drives the worm gear 43 to rotate through the worm 42, and the worm gear 43 drives the threaded rod 12 in the slide groove 11 to rotate. During the rotation of the threaded rod 12, the slider 10 is driven to move downward, thereby driving the installation shell 5 to move downward, and then driving the soil drilling assembly 6 to move downward to perform the drilling operation.

[0027] Example 3 like Figure 4~Figure 10 As shown, based on the same concept as the above-mentioned embodiment 1, this embodiment further proposes: The driving assembly 7 includes a scissor rod 71, which is installed in the installation shell 5. The top of the middle node position of the scissor rod 71 is rotatably installed with a driving gear 72 through a bearing; The same linkage gear 73 is meshed between two adjacent driving gears 72, and the linkage gear 73 is rotatably mounted at the outer node position of the scissor rod 71; The bottom end of the middle node position of the scissor rod 71 is rotatably mounted with an I-shaped block 74 through a bearing; A limit slot is formed on the bottom wall of the mounting shell 5 at a position corresponding to the I-shaped block 74. The I-shaped block 74 on the left is fixed at the leftmost end of the limit slot, and the remaining I-shaped blocks 74 are slidably mounted in the limit slot. A second motor 76 is fixed to the top wall of the mounting shell 5. The power shaft of the second motor 76 passes through the top wall of the mounting shell 5 through a bearing and is fixed with a driving gear 75. The driving gear 75 is meshed and connected to the leftmost driving gear 72. A second hydraulic cylinder 77 is fixed to the right wall of the mounting shell 5 , and a movable end of the second hydraulic cylinder 77 slides through the right wall of the mounting shell 5 and is fixed with a mounting block 78 , which is fixed on the top wall of the rightmost I-shaped block 74 .

[0028] In this embodiment, the driving assembly 7 is capable of controlling the soil drilling assembly 6 to work, and can also adjust the position between adjacent soil drilling assemblies 6, thereby achieving the simultaneous drilling of holes in multiple positions, and improving work efficiency. When the position between the soil drilling assemblies 6 needs to be adjusted, the second hydraulic cylinder 77 is controlled to extend and retract, and the second hydraulic cylinder 77 pushes the right I-shaped block 74 to move through the mounting block 78. During the movement of the right I-shaped block 74, the scissor rod 71 drives the middle I-shaped block 74 to move, thereby achieving the position adjustment between adjacent soil drilling assemblies 6. When it is necessary to control the soil drilling assembly 6 to work, the second motor 76 is turned on, and the second motor 76 drives the driving gear 75 to rotate, and the driving gear drives the corresponding active gear 72 to rotate, and the current active gear 72 drives the remaining active gears 72 to rotate through the provided linkage gear 73, thereby driving the soil drilling assembly 6 to work.

[0029] The soil drilling assembly 6 includes a mounting tube 61, which is fixed to the bottom end of the I-shaped block 74, and a drill rod 62 is rotatably mounted in the mounting tube 61; The top of the drill rod 62 passes through the I-shaped block 74 and the scissor rod 71 through a bearing and is fixedly connected to the driving gear 72. The outer wall of the drill rod 62 is fixed with an auger blade 63. The auger blade 63 is in contact with the inner wall of the mounting tube 61 .

[0030] The drill bit 9 is fixed to the bottom end of the drill rod 62 , and a plurality of feed slots 15 arranged obliquely are symmetrically provided on the drill bit 9 .

[0031] The outer wall of the mounting cylinder 61 is arranged in a stepped shape, and the outer diameter of the bottom of the mounting cylinder 61 is smaller than the outer diameter of the top thereof (the length of the cylinder with the largest outer diameter above the mounting cylinder 61 is much longer than the length of the cylinder with other outer diameters, and the drawings in the present invention are only for illustration), and a slag discharge pipe (not drawn in the drawing) is fixedly connected to the top of the front side of the mounting cylinder 61.

[0032] In this embodiment, the soil drilling assembly 6 can perform drilling operations and discharge soil and gravel generated by drilling. When the soil drilling assembly 6 is working, the drill rod 62 drives the drill bit 9 at the bottom to rotate, and the soil and gravel generated by the drill bit 9 during the drilling process will enter the installation tube 61 through the feed slot 15. The rotation of the drill rod 62 drives the auger blade 63 to rotate, thereby continuously transmitting the soil and gravel upward, and finally discharging it through the slag discharge pipe.

[0033] The wall tamping mechanism 8 includes a sliding block 81, which slides through the side wall of the mounting tube 61, and an arc-shaped tamping plate 82 is fixed to one end of the sliding block 81 located outside the mounting tube 61, and a limiting plate 83 is fixed to the outer wall of the sliding block 81. A limiting groove 16 is provided on the wall of the mounting tube 61 at a position corresponding to the limiting plate 83; The limiting plate 83 is slidably installed in the limiting groove 16, and a spring 84 is fixed between the side wall of the limiting plate 83 and the side wall of the limiting groove 16; The spring 84 is sleeved on the outside of the sliding block 81 .

[0034] In this embodiment, the wall tamping mechanism 8 is set up to continuously tamp the hole wall during the drilling process, so as to effectively avoid the hole wall collapse during the process of lowering the steel cage, reduce the workload of secondary hole cleaning, and speed up the construction progress. During the operation of the soil drilling assembly 6, the drill rod 62 drives the auger blade 63 to rotate, and the auger blade 63 will intermittently squeeze the sliding block 81 at a position. The sliding block 81 moves outward under the action of the auger blade 63, so that the arc tamping plate 82 squeezes the inner wall of the borehole. At the same time, the outer wall of the installation tube 61 is arranged in a stepped shape, and the outer diameter of the bottom of the installation tube 61 is smaller than the outer diameter of the top thereof. The difference in the outer diameters of adjacent parts is about 1-2 cm. Therefore, as the installation tube 61 continues to move downward, the inner wall of the borehole will be continuously tamped, thereby avoiding the hole wall collapse during the process of lowering the steel cage.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An improved multi-axis bored pile construction device, characterized in that: include: A crawler vehicle body (1), wherein a mounting plate (2) is rotatably mounted on the front side of the top wall of the crawler vehicle body (1), and a first hydraulic cylinder (3) is rotatably mounted between the mounting plate (2) and the crawler vehicle body (1); A mounting shell (5), the mounting shell (5) being slidably mounted on the mounting plate (2), and a lifting component (4) for driving the mounting shell (5) to move upward and downward is installed inside the top end of the mounting plate (2); A soil drilling assembly (6), the soil drilling assembly (6) being symmetrically mounted on the bottom of the mounting shell (5), a driving assembly (7) for driving the soil drilling assembly (6) to work being mounted inside the mounting shell (5), wall tamping mechanisms (8) being evenly mounted on the outer wall of the soil drilling assembly (6), and a drill bit (9) being mounted on the bottom end of the soil drilling assembly (6).

2. The improved multi-axis bored pile construction equipment according to claim 1, characterized in that: The rear wall of the mounting shell (5) is symmetrically fixed with three sliders (10); the front wall of the mounting plate (2) is provided with a slide groove (11) matched with the slider (10); the slider (10) is slidably mounted in the slide groove (11); threaded rods (12) are rotatably mounted in the slide grooves (11) located on both sides; the threaded rods (12) are threadedly connected and penetrate the corresponding slider (10); a guide shaft (13) is fixed in the slide groove (11) located in the middle; the guide shaft (13) slidably penetrates the corresponding slider (10).

3. The improved multi-axis bored pile construction equipment according to claim 2, characterized in that: A mounting groove (14) is provided inside the top end of the mounting plate (2), and the lifting assembly (4) is mounted in the mounting groove (14).

4. The improved multi-axis bored pile construction equipment according to claim 3, characterized in that: The lifting assembly (4) comprises a mounting shaft (41), the mounting shaft (41) being rotatably mounted between the inner walls of the mounting groove (14), and worm gears (42) being fixed to the shaft bodies at both ends of the mounting shaft (41); The worms (42) are meshingly connected to the worm wheels (43); the top end of the threaded rod (12) passes through the bottom wall of the mounting groove (14) via a bearing and is fixedly connected to the corresponding bottom axis position of the worm wheel (43); A first motor (44) is fixed to the top of the side wall of the mounting plate (2); a power shaft of the first motor (44) passes through the side wall of the mounting groove (14) via a bearing and is fixedly connected to one end of the mounting shaft (41).

5. The improved multi-axis bored pile construction equipment according to claim 1, characterized in that: The driving assembly (7) comprises a scissor rod (71), the scissor rod (71) being installed in the mounting shell (5), and a driving gear (72) being rotatably installed at the top end of a middle node position of the scissor rod (71) via a bearing; A same linkage gear (73) is meshed between two adjacent driving gears (72), and the linkage gear (73) is rotatably mounted at an outer node position of the scissor rod (71); An I-shaped block (74) is rotatably mounted at the bottom end of the middle node position of the scissor rod (71) via a bearing; A limit slot is formed on the bottom wall of the mounting shell (5) at a position corresponding to the I-shaped block (74); the I-shaped block (74) on the left is fixed at the leftmost end of the limit slot, and the remaining I-shaped blocks (74) are slidably mounted in the limit slot; A second motor (76) is fixed to the top wall of the mounting shell (5); a power shaft of the second motor (76) passes through the top wall of the mounting shell (5) via a bearing and is fixed with a driving gear (75); the driving gear (75) is meshedly connected to the leftmost driving gear (72); A second hydraulic cylinder (77) is fixed to the right wall of the mounting shell (5); a movable end of the second hydraulic cylinder (77) slides through the right wall of the mounting shell (5) and is fixed with a mounting block (78); the mounting block (78) is fixed to the top wall of the rightmost I-shaped block (74).

6. The improved multi-axis bored pile construction equipment according to claim 5, characterized in that: The soil drilling assembly (6) comprises a mounting tube (61), wherein the mounting tube (61) is fixed to the bottom end of the I-shaped block (74), and a drill rod (62) is rotatably mounted in the mounting tube (61); The top end of the drill rod (62) passes through the I-shaped block (74) and the scissor rod (71) through a bearing and is fixedly connected to the driving gear (72); an auger blade (63) is fixed to the outer wall of the drill rod (62); The auger blade (63) is in contact with the inner wall of the mounting tube (61).

7. The improved multi-axis bored pile construction equipment according to claim 6, characterized in that: The drill bit (9) is fixed to the bottom end of the drill rod (62), and a plurality of inclined feed slots (15) are symmetrically provided on the drill bit (9).

8. The improved multi-axis bored pile construction equipment according to claim 6, characterized in that: The outer wall of the installation tube (61) is arranged in a stepped shape, and the outer diameter of the bottom of the installation tube (61) is smaller than the outer diameter of the top thereof; the top of the front side of the installation tube (61) is fixedly connected to a slag discharge pipe.

9. The improved multi-axis bored pile construction equipment according to claim 6, characterized in that: The wall tamping mechanism (8) comprises a sliding block (81), the sliding block (81) slidingly passes through the side wall of the mounting tube (61), an arc-shaped tamping plate (82) is fixed to one end of the sliding block (81) located outside the mounting tube (61), a limiting plate (83) is fixed to the outer wall of the sliding block (81), and a limiting groove (16) is provided on the wall of the mounting tube (61) at a position corresponding to the limiting plate (83); The limiting plate (83) is slidably mounted in the limiting groove (16), and a spring (84) is fixed between a side wall of the limiting plate (83) and a side wall of the limiting groove (16); The spring (84) is sleeved outside the sliding block (81).

10. A construction method for improving construction equipment for multi-axis bored piles according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: driving the crawler vehicle body (1) to the drilling position, and controlling the first hydraulic cylinder (3) to extend so that the mounting plate (2) is in a vertical state; Step 2: adjusting the position between adjacent soil drilling assemblies (6) according to the distance between adjacent drill holes, and adjusting the position between the I-shaped blocks (74) by means of a second hydraulic cylinder (77) in the drive assembly (7), so that the drill bit (9) at the bottom of the soil drilling assembly (6) is aligned with the center position of the current drill hole; Step 3: Turn on the second motor (76) in the driving assembly (7), the second motor (76) drives the soil drilling assembly (6) to work, and at the same time, the lifting assembly (4) cooperates with the threaded rod (12) and the slider (10) to drive the soil drilling assembly (6) to move downward to perform a drilling operation. During the drilling process, the auger blade (63) in the soil drilling assembly (6) will intermittently squeeze the wall tamping mechanism (8), so that the wall tamping mechanism (8) continuously tamps the inner wall of the borehole. At the same time, the outer wall of the mounting tube (61) is arranged in a stepped shape, and the tamping mechanism (8) can tamping the inner wall of the borehole multiple times, and the auger blade (63) can discharge the soil and gravel generated by the drilling through the slag discharge pipe on the mounting tube (61), thereby completing the drilling operation.

Images