High-strength solidified soil mixing pile construction equipment that replaces bite piles and concrete piles

Abstract

The present invention relates to the technical field of mixing pile construction equipment, and discloses high-strength solidified soil mixing pile construction equipment that replaces interlocking pile concrete piles. The equipment comprises a drilling platform arranged on the pile construction site, a power head and a mixing drill rod clamped and rotated by the power head are provided on the drilling platform, a mixing drill bit is provided at the bottom of the mixing drill rod, which drills downward into the soil at the pile construction site, and a slurry outlet for spraying solidified slurry and an air outlet for spraying high-pressure gas are provided at the bottom of the mixing drill bit. The soil in the pile construction site is cut, broken up and stirred by the mixing drill rod and the mixing drill bit of the rotary drilling rig, and then the solidified slurry and high-pressure air are sprayed by the mixing drill bit. The soil and the solidified slurry are fully mixed and solidified to form piles, and the high-pressure air sprayed by the mixing drill bit can further improve the mixing effect of the soil and the solidified slurry, thereby solving the problems of significantly low strength, poor quality, poor integrity and easy leakage of the rotary jet pile body.

Description

Technical Field

[0001] The present invention relates to the technical field of mixing pile construction equipment, in particular to high-strength solidified soil mixing pile construction equipment which can replace bite piles and concrete piles. Background Art

[0002] In foundation pit support projects, interlocking piles are widely used in foundation pit projects due to their advantages of support, water stopping and low cost. Interlocking piles are reinforced concrete bored piles (referred to as meat piles) and adjacent plain concrete bored piles (referred to as plain piles) cut and interlocked together. Mechanic piles generally use concrete with a strength grade of C25-C30 (the compressive strength of the pile body is 25 or 30 MPa), while plain piles generally use concrete with a strength grade of C10-C15 (the compressive strength of the pile body is 10 or 15 MPa). This process generally uses a rotary drilling rig to construct plain piles at intervals. After the plain pile concrete has finally set and the strength is low, holes are cut between the two plain piles, steel cages are inserted, and concrete is poured to construct reinforced concrete meat piles. The plain piles and meat piles interlock with each other to form an overall continuous retaining support structure with good anti-seepage effect.

[0003] The existing interlocking pile structure has a high pile body strength, but the construction and material costs are high; while the cast-in-place pile + jet grouting pile structure has a lower jet grouting cost, but the pile body strength is significantly lower and the quality is poor, the integrity is poor, and it is prone to leakage. Summary of the Invention

[0004] The purpose of the present invention is to provide high-strength solidified soil mixing pile construction equipment to replace the bite pile concrete pile, aiming to solve the problem in the existing technology that the jet grouting pile body has significantly low strength and poor quality, poor integrity and easy leakage.

[0005] The present invention is implemented as follows: a high-strength solidified soil mixing pile construction device that replaces the occlusal pile concrete pile includes a drilling platform arranged at the pile construction site, a power head and a mixing drill rod that is clamped and rotated by the power head, and a mixing drill bit is provided at the bottom of the mixing drill rod to drill downward into the soil at the pile construction site;

[0006] The stirring drill rod is hollow and has a longitudinally arranged rod cavity therein. The bottom of the stirring drill bit is provided with a slurry outlet for ejecting solidifying slurry and an air outlet for ejecting high-pressure gas. A slurry outlet pipe for high-pressure delivery of solidifying slurry and an air outlet pipe for high-pressure delivery of high-pressure gas are provided in the rod cavity. The slurry outlet pipe is connected to the slurry outlet, and the air outlet pipe is connected to the air outlet.

[0007] The power head drives the stirring drill rod to rotate, and the stirring drill bit rotates with the stirring drill rod to drill the soil in the stirring pile construction site. The slurry outlet sprays solidifying slurry, and the gas outlet sprays high-pressure gas. The solidifying slurry and high-pressure gas are mixed and stirred with the drilled soil.

[0008] Furthermore, the drilling rig platform is provided with a longitudinally arranged frame, the frame is provided with a lifter, the lifter is provided with a wire rope, and the lifter reels or releases the wire rope by rotating; a roller is provided on the top of the frame, the wire rope passes around the roller from bottom to top, and is connected to the stirring drill rod.

[0009] Furthermore, the stirring drill rod is arranged in parallel with the frame.

[0010] Furthermore, the frame is provided with a longitudinally arranged guide rail, and the power head is movably connected to the guide rail; when the mixing drill bit drills the soil downward in the pile construction position, the power head moves downward along the guide rail.

[0011] Furthermore, a guide head is provided on the frame, the guide head is movably connected to the guide rail and is located below the power head, and the stirring drill rod movably passes through the guide head.

[0012] Furthermore, a plurality of stirring blades are provided on the outer periphery of the lower portion of the stirring drill rod, and the plurality of stirring blades are arranged at intervals along the circumferential direction and the axial direction of the lower portion of the stirring drill rod;

[0013] When the mixing drill bit drills downward into the soil at the pile construction site, the slurry outlet sprays out solidifying slurry at high pressure, and the gas outlet sprays out high-pressure gas. The solidifying slurry and high-pressure gas are mixed and stirred with the soil respectively to form a mixed stirring body. As the mixing drill bit drills forward, the multiple mixing blades on the mixing drill rod perform secondary mixing and stirring on the mixed stirring body.

[0014] Furthermore, the outer periphery of the stirring drill bit is provided with spiral blades, and the outer diameter of the spiral blades gradually increases along the direction from bottom to top of the stirring drill bit, and spiral paths are formed between the spiral blades, and the spiral paths are spirally arranged along the spiral direction of the spiral blades;

[0015] The inner end of the spiral blade is butted against the outer periphery of the mixing drill bit, and the outer end of the spiral blade is away from the mixing drill bit and is arranged outwardly. The outer end of the spiral blade is provided with a plurality of outer end drill teeth, and the plurality of outer end drill teeth are arranged at intervals along the spiral direction of the spiral blade, and the outer end drill teeth are arranged in an inclined manner, and the inclination direction of the outer end drill teeth is opposite to the spiral direction of the spiral blade.

[0016] When the mixing drill bit drills downward into the soil at the pile construction site, the outer drill teeth drill and break up the soil, and the solidified slurry sprayed from the slurry outlet and the high-pressure gas sprayed from the gas outlet are mixed and stirred with the broken up soil. The mixed and stirred soil is squeezed through the spiral path to form the mixed and stirred body.

[0017] Furthermore, the bottom of the spiral blade is butted against the bottom of the mixing drill bit to form a bottom section arranged downward; a plurality of bottom drill teeth are provided on the outer periphery of the bottom section, and the plurality of bottom drill teeth are arranged at intervals along the outer periphery of the bottom section, the upper ends of the bottom drill teeth are butted against the bottom section, and the lower ends of the bottom drill teeth are arranged outwardly and tilted away from the bottom section; the slurry outlet and the air outlet are respectively provided on the bottom section;

[0018] When the mixing drill bit drills the soil downward in the pile construction position, the bottom drill teeth and the outer end drill teeth drill and break up the soil.

[0019] Furthermore, the spiral blade has an extrusion surface facing the spiral path, and a plurality of spherical protrusions are convexly provided on the extrusion surface. The plurality of spherical protrusions are arranged at intervals and in a grid-like manner on the extrusion surface; a plurality of swing bars are convexly provided on the extrusion surface, the inner ends of the swing bars are hinged to the spherical protrusions, and the lower ends of the swing bars extend toward the spiral path;

[0020] When the mixed and stirred soil passes through the spiral path and is squeezed, the plurality of swing bars on the spherical protrusion swing along the flow direction of the soil to break up the soil.

[0021] Furthermore, as the stirring drill bit moves from bottom to top, the width of the spiral path gradually decreases; the outer periphery of the stirring drill bit has a spiral wall located at the bottom of the spiral path, and the spiral wall extends along the spiral direction of the spiral path;

[0022] The spiral wall is provided with a plurality of toggle bars that swing toward the spiral path, and the plurality of toggle bars are arranged at intervals along the spiral direction of the spiral path, and the ends of the toggle bars are respectively connected to the spiral blades; the inner side wall of the bottom drill teeth has inner drill teeth, the inner ends of the inner drill teeth are connected to the middle of the bottom drill teeth, and the outer ends of the inner drill teeth are arranged outwardly and deviate from the bottom section.

[0023] When the mixing drill bit drills the soil downward at the pile construction site, the inner drill teeth and the bottom drill teeth drill the soil downward, limiting the soil from being squeezed upward to the bottom section.

[0024] Compared with the prior art, the high-strength solidified soil mixing pile construction equipment provided by the present invention replaces the interlocking pile concrete pile. The soil in the pile construction site is cut, broken up and stirred by the mixing drill rod and mixing drill bit of the rotary drilling rig, and then the solidifying slurry and high-pressure air are sprayed through the mixing drill bit. The soil and the solidifying slurry are fully mixed and solidified to form piles, and the high-pressure air sprayed by the mixing drill bit can further improve the mixing effect of the soil and the solidifying slurry, thereby solving the problems of significantly low strength, poor quality, poor integrity and easy leakage of the rotary jet pile body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of the high-strength solidified soil mixing pile construction equipment provided by the present invention that replaces the occlusal pile concrete pile;

[0026] Figure 2 This is a schematic structural diagram of the stirring drill bit provided by the present invention;

[0027] Figure 3 It is a structural schematic diagram of the bottom drill teeth and inner drill teeth provided by the present invention.

[0028] In the figure: drilling rig platform 100, power head 200, stirring drill rod 300, stirring drill bit 400, frame 500, rod cavity 301, slurry outlet pipe 302, air outlet pipe 303, stirring blade 304, spiral blade 401, spiral path 402, outer end drill tooth 403, bottom section 404, bottom drill tooth 405, extrusion surface 406, spherical protrusion 407, swing bar 408, spiral wall 409, toggle bar 410, inner drill tooth 411, lifter 501, wire rope 502, roller 503, guide rail 504, guide head 505. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] The implementation of the present invention is described in detail below with reference to specific embodiments.

[0031] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] Reference Figure 1-3 The figure shows a preferred embodiment of the present invention.

[0033] The high-strength solidified soil mixing pile construction equipment, which replaces the snap pile concrete pile, includes a drilling platform 100 arranged at the pile construction site. The drilling platform 100 is provided with a power head 200 and a mixing drill rod 300 that is clamped and rotated by the power head 200. The bottom of the mixing drill rod 300 is provided with a mixing drill bit 400 that drills downward into the soil at the pile construction site.

[0034] The mixing drill rod 300 is hollow and has a longitudinally arranged rod cavity 301 therein. The bottom of the mixing drill bit 400 is provided with a slurry outlet for ejecting solidified slurry and an air outlet for ejecting high-pressure gas. A slurry outlet pipe 302 for high-pressure delivery of solidified slurry and an air outlet pipe 303 for high-pressure delivery of high-pressure gas are provided in the rod cavity 301. The slurry outlet pipe 302 is connected to the slurry outlet, and the air outlet pipe 303 is connected to the air outlet.

[0035] The power head 200 drives the stirring drill rod 300 to rotate, and the stirring drill bit 400 rotates with the stirring drill rod 300 to drill the soil in the stirring pile construction position, and the slurry outlet sprays solidifying slurry, and the gas outlet sprays high-pressure gas. The solidifying slurry and high-pressure gas are mixed and stirred with the drilled soil.

[0036] The high-strength solidified soil mixing pile construction equipment provided above replaces the bite pile concrete pile. The soil in the pile construction site is cut, broken up and mixed by the mixing drill rod 300 and the mixing drill bit 400 of the rotary drilling rig, and then the solidifying slurry and high-pressure air are sprayed by the mixing drill bit 400. The soil and the solidifying slurry are fully mixed and solidified to form piles. The high-pressure air sprayed by the mixing drill bit 400 can further improve the mixing effect of the soil and the solidifying slurry, thereby solving the problem that the strength of the rotary jet pile body is significantly low, the quality is poor, the integrity is poor, and it is easy to leak.

[0037] A longitudinally arranged frame 500 is provided on the drilling rig platform 100, and a hoist 501 is provided on the frame 500. A wire rope 502 is provided in the hoist 501, and the hoist 501 reels or releases the wire rope 502 by rotating; a roller 503 is provided on the top of the frame 500, and the wire rope 502 passes around the roller 503 from bottom to top and is connected to the stirring drill rod 300; in this way, the frame 500 can control the stirring drill rod 300 to move up and down through the hoist 501.

[0038] The stirring drill rod 300 and the frame 500 are arranged in parallel with each other; in this way, the stirring drill rod 300 will not affect the frame 500 when working.

[0039] A longitudinally arranged guide rail 504 is provided on the frame 500, and the power head 200 is movably connected to the guide rail 504; when the mixing drill bit 400 drills downward into the soil at the pile construction site, the power head 200 moves downward along the guide rail 504; in this way, the frame 500 supplies the power head 200 with the guide rail 504 to drive the mixing drill rod 300 and the mixing drill bit 400 to drill toward the pile construction site.

[0040] A guide head 505 is provided on the frame 500, which is movably connected to the guide rail 504 and is located below the power head 200. The mixing drill rod 300 moves through the guide head 505; in this way, the frame 500 can stabilize the mixing drill rod 300 through the guide head 505 when drilling in the pile construction position, and there will be no deviation.

[0041] In this embodiment, a plurality of stirring blades 304 are provided on the outer periphery of the lower portion of the stirring drill rod 300 , and the plurality of stirring blades 304 are arranged at intervals along the circumferential direction and the axial direction of the lower portion of the stirring drill rod 300 ;

[0042] When the mixing drill bit 400 drills downward into the soil at the pile construction site, the slurry outlet sprays out solidifying slurry at high pressure, and the gas outlet sprays out high-pressure gas. The solidifying slurry and the high-pressure gas are mixed and stirred with the soil respectively to form a mixed stirring body. As the mixing drill bit 400 drills forward, the multiple mixing blades 304 on the mixing drill rod 300 perform secondary mixing and stirring on the mixed stirring body.

[0043] The mixing drill rod 300 uses the slurry outlet pipe 302 and the air outlet pipe 303 to transport the solidified slurry and high-pressure gas to the soil under high pressure for mixing and stirring, and then uses multiple stirring blades 304 to perform secondary mixing and stirring on the mixed stirring body, thereby improving the mixing effect between the soil and the solidified slurry, and solving the problem that the cement slurry and soil cannot be completely mixed evenly.

[0044] In this embodiment, spiral blades 401 are provided on the outer periphery of the mixing drill bit 400. The outer diameter of the spiral blades 401 gradually increases from bottom to top of the mixing drill bit 400. A spiral path 402 is formed between the spiral blades 401. The spiral path 402 is spirally arranged along the spiral direction of the spiral blades 401.

[0045] The inner end of the spiral blade 401 is butted against the outer periphery of the mixing drill bit 400, and the outer end of the spiral blade 401 is away from the mixing drill bit 400 and is arranged outwardly. The outer end of the spiral blade 401 is provided with a plurality of outer end drill teeth 403, which are arranged at intervals along the spiral direction of the spiral blade 401 and are arranged obliquely, and the inclination direction of the outer end drill teeth 403 is opposite to the spiral direction of the spiral blade 401.

[0046] When the mixing drill bit 400 drills downward into the soil at the pile construction site, the outer drill teeth 403 drill and break up the soil, and the solidified slurry sprayed from the slurry outlet and the high-pressure gas sprayed from the gas outlet are mixed and stirred with the broken up soil. The mixed and stirred soil is squeezed through the spiral channel 402 to form a mixed and stirred body.

[0047] The mixing drill bit 400 can drill into hard sand layers, pebble layers, and weathered rock layers and cut and break up the mixed soil through the outer end drill teeth 403. The solidified slurry sprayed out from the bottom slurry outlet of the mixing drill bit 400 and the high-pressure gas sprayed out from the gas outlet can fully force the solidified slurry and soil to be evenly mixed through the rotating blades 401.

[0048] In this embodiment, the bottom of the spiral blade 401 is docked with the bottom of the mixing drill bit 400, forming a bottom section 404 arranged downwardly. A plurality of bottom drill teeth 405 are provided on the outer periphery of the bottom section 404. The plurality of bottom drill teeth 405 are arranged at intervals along the outer periphery of the bottom section 404. The upper ends of the bottom drill teeth 405 are docked with the bottom section 404, and the lower ends of the bottom drill teeth 405 are arranged outwardly and away from the bottom section 404. A slurry outlet and an air outlet are respectively provided on the bottom section 404.

[0049] When the mixing drill bit 400 drills downward into the soil at the pile construction site, the bottom drill teeth 405 and the outer end drill teeth 403 drill and break up the soil.

[0050] The mixing drill bit 400 can drill into hard sand layers, pebble layers, and weathered rock layers and cut and disperse the mixed soil through the outer end drill teeth 403 and the bottom drill teeth 405 .

[0051] In this embodiment, the spiral blade 401 has an extrusion surface 406 facing the spiral path 402. A plurality of spherical protrusions 407 are provided on the extrusion surface 406. The plurality of spherical protrusions 407 are arranged at intervals and in a grid pattern on the extrusion surface 406. A plurality of swing bars 408 are provided on the extrusion surface 406. The inner ends of the swing bars 408 are hinged to the spherical protrusions 407, and the lower ends of the swing bars 408 extend toward the spiral path 402.

[0052] When the mixed and stirred soil passes through the spiral path 402 and is squeezed, the plurality of swing bars 408 on the spherical protrusion 407 swing along the flow direction of the soil to break up the soil.

[0053] The spiral blade 401 swings and breaks up the soil flowing in the spiral path 402 through the multiple spherical protrusions 407 on the extrusion surface 406 in conjunction with the multiple swing bars 408, and forcibly mixes the solidified slurry and the soil evenly.

[0054] In this embodiment, as the stirring drill bit 400 moves from bottom to top, the width of the spiral path 402 gradually decreases; the outer periphery of the stirring drill bit 400 has a spiral wall 409 located at the bottom of the spiral path 402, and the spiral wall 409 extends along the spiral direction of the spiral path 402;

[0055] The spiral wall 409 is provided with a plurality of toggle bars 410 that swing toward the spiral path 402. The plurality of toggle bars 410 are spaced apart along the spiral direction of the spiral path 402, and the ends of the toggle bars 410 are respectively connected to the spiral blades 401. The inner side wall of the bottom drill tooth 405 has an inner drill tooth 411. The inner end of the inner drill tooth 411 is connected to the middle portion of the bottom drill tooth 405, and the outer end of the inner drill tooth 411 is arranged outwardly and away from the bottom section 404.

[0056] When the mixing drill bit 400 drills the soil downward at the pile construction site, the inner drill teeth 411 and the bottom drill teeth 405 drill the soil downward, limiting the soil from being squeezed upward to the bottom section 404 .

[0057] The mixing drill bit 400 swings and breaks up the soil flowing in the spiral channel 402 through multiple toggle bars 410 and forces the solidified slurry and soil to mix evenly; the bottom drill teeth 405 swing and toggle the slurry outlet and the air outlet on the bottom section 404 through the inner drill teeth 411 to prevent the slurry outlet and the air outlet from being blocked during drilling, thereby affecting the discharge of solidified slurry from the slurry outlet and the discharge of high-pressure gas from the air outlet.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. High-strength solidified soil mixing pile construction equipment that replaces bite piles and concrete piles, characterized by: The invention comprises a drilling platform arranged at the pile construction site, the drilling platform is provided with a power head and a mixing drill rod clamped and rotated by the power head, and the bottom of the mixing drill rod is provided with a mixing drill bit that drills downward into the soil at the pile construction site; The stirring drill rod is hollow and has a longitudinally arranged rod cavity therein. The bottom of the stirring drill bit is provided with a slurry outlet for ejecting solidifying slurry and an air outlet for ejecting high-pressure gas. A slurry outlet pipe for high-pressure delivery of solidifying slurry and an air outlet pipe for high-pressure delivery of high-pressure gas are provided in the rod cavity. The slurry outlet pipe is connected to the slurry outlet, and the air outlet pipe is connected to the air outlet. The power head drives the stirring drill rod to rotate, and the stirring drill bit rotates with the stirring drill rod to drill the soil in the pile construction site. The slurry outlet sprays solidifying slurry, and the gas outlet sprays high-pressure gas. The solidifying slurry and high-pressure gas are mixed and stirred with the drilled soil. The outer periphery of the mixing drill bit is provided with spiral blades, and the outer diameter of the spiral blades gradually increases along the direction from bottom to top of the mixing drill bit, and spiral paths are formed between the spiral blades, and the spiral paths are spirally arranged along the spiral direction of the spiral blades; The inner end of the spiral blade is butted against the outer periphery of the mixing drill bit, and the outer end of the spiral blade is away from the mixing drill bit and is arranged outwardly. The outer end of the spiral blade is provided with a plurality of outer end drill teeth, and the plurality of outer end drill teeth are arranged at intervals along the spiral direction of the spiral blade, and the outer end drill teeth are arranged in an inclined manner, and the inclination direction of the outer end drill teeth is opposite to the spiral direction of the spiral blade. The bottom of the spiral blade is butted against the bottom of the mixing drill bit to form a bottom section arranged downward; a plurality of bottom drill teeth are provided on the outer periphery of the bottom section, and the plurality of bottom drill teeth are arranged at intervals along the outer periphery of the bottom section, the upper ends of the bottom drill teeth are butted against the bottom section, and the lower ends of the bottom drill teeth are arranged outwardly and tilted away from the bottom section; the slurry outlet and the air outlet are respectively provided on the bottom section; The spiral blade has an extrusion surface facing the spiral path, and a plurality of spherical protrusions are convexly provided on the extrusion surface. The plurality of spherical protrusions are arranged at intervals and in a grid-like manner on the extrusion surface; a plurality of swing bars are convexly provided on the extrusion surface, the inner ends of the swing bars are hinged to the spherical protrusions, and the lower ends of the swing bars extend toward the spiral path; When the mixing drill bit drills the soil downward in the pile construction site, the bottom drill teeth and the outer drill teeth drill and break up the soil; the solidified slurry sprayed from the slurry outlet and the high-pressure gas sprayed from the gas outlet are mixed and stirred with the broken up soil, and the mixed and stirred soil is squeezed through the spiral channel to form a mixed and stirred body; when the mixed and stirred soil is squeezed through the spiral channel, the multiple swing bars on the spherical protrusion swing along the flow direction of the soil to break up the soil.

2. The high-strength solidified soil mixing pile construction equipment as claimed in claim 1, which replaces the occlusal pile concrete pile, A longitudinally arranged frame is provided on the drilling rig platform, a hoist is provided on the frame, a wire rope is provided in the hoist, and the hoist reels or releases the wire rope by rotating; a roller is provided on the top of the frame, the wire rope passes around the roller from bottom to top, and is connected to the stirring drill rod.

3. The high-strength solidified soil mixing pile construction equipment as claimed in claim 2, which replaces the occlusal pile concrete pile, The stirring drill rod is arranged in parallel with the frame.

4. The high-strength solidified soil mixing pile construction equipment as claimed in claim 3, which is characterized in that: The frame is provided with a longitudinally arranged guide rail, and the power head is movably connected to the guide rail; when the mixing drill bit drills the soil downward in the pile construction position, the power head moves downward along the guide rail.

5. The high-strength solidified soil mixing pile construction equipment for replacing the occlusal pile concrete pile according to claim 4, characterized in that: A guide head is provided on the frame, the guide head is movably connected to the guide rail and is located below the power head, and the stirring drill rod movably passes through the guide head.

6. The high-strength solidified soil mixing pile construction equipment for replacing the occlusal pile concrete pile according to claim 5, characterized in that: A plurality of stirring blades are provided on the outer periphery of the lower part of the stirring drill rod, and the plurality of stirring blades are arranged at intervals along the circumference and axial direction of the lower part of the stirring drill rod; as the stirring drill bit drills forward, the plurality of stirring blades on the stirring drill rod perform secondary mixing and stirring on the mixing body.

7. The high-strength solidified soil mixing pile construction equipment as claimed in any one of claims 1 to 6, which is characterized in that: As the stirring drill bit moves from bottom to top, the width of the spiral path gradually decreases; the outer periphery of the stirring drill bit has a spiral wall located at the bottom of the spiral path, and the spiral wall extends along the spiral direction of the spiral path; The spiral wall is provided with a plurality of toggle bars that swing toward the spiral path, and the plurality of toggle bars are arranged at intervals along the spiral direction of the spiral path, and the ends of the toggle bars are respectively connected to the spiral blades; the inner side wall of the bottom drill teeth has inner drill teeth, the inner ends of the inner drill teeth are connected to the middle of the bottom drill teeth, and the outer ends of the inner drill teeth are arranged outwardly and deviate from the bottom section. When the mixing drill bit drills the soil downward at the pile construction site, the inner drill teeth and the bottom drill teeth drill the soil downward, limiting the soil from being squeezed upward to the bottom section.

Images