A deep quicksand layer cutting auxiliary device and pile forming method using the device

Abstract

The present invention relates to the field of building construction technology, and specifically to a deep quicksand layer cutting auxiliary device and a pile forming method using the device. The device comprises: a cutting head, a slag discharge pipe, a rotary jet pipe and a straightening ring; the cutting head comprises a cutting panel and a blade foot circumferentially arranged below the cutting panel, the slag discharge pipe is detachably connected to the center of the cutting panel to discharge the mud or soil slag suspension formed by cutting at the bottom of the pile hole, a vibrator is arranged at the upper part of the slag discharge pipe, the rotary jet pipe is arranged in the slag discharge pipe and the bottom is connected to the rotary jet head, the straightening ring is arranged at the upper periphery of the slag discharge pipe, and is arranged on the ground to maintain the cutting auxiliary device in the center of the pile hole during the downward movement. The deep quicksand layer cutting auxiliary device of the present invention solves the problem of thick sediment in the hole by continuously discharging the residue at the bottom of the pile hole, and also solves the problem of hole wall stability by drilling and coordinating concrete pouring, and the device is low in cost and easy to use.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a deep quicksand layer cutting auxiliary device and a pile forming method using the device. Background Art

[0002] When drilling in an underwater fine sand layer, the hole wall collapses due to the instability of the fine sand layer section, and then excessive pile bottom sediment is formed, which has a serious impact on the bearing capacity of the pile. The thicker the unstable fine sand layer is, the greater the impact on the bearing capacity of the pile. Some projects have used high-quality mud wall protection, but the effect is not satisfactory. For this problem, the current better solutions include steel casing wall protection hole forming method, homemade wall protection ring drilling hole forming technology (CN 110821411 A), etc. However, the use of steel casing wall protection increases the difficulty of inserting and pulling out the casing due to the instability of the underwater fine sand layer and the easy adhesion of the pipe. For the steel casing wall protection of large-diameter pile holes, the project cost will also be greatly increased. The homemade wall protection ring technology also has the problem of increased costs. Summary of the invention

[0003] Aiming at the problems of thick sediment and stable hole wall in underwater deep fine sand layer, the present invention develops a low-cost deep quicksand layer cutting auxiliary device and a pile forming method of high-pressure rotary jet drilling and pouring pile body concrete. The method uses high-pressure rotary jet drilling to cut the soil body in the bottom cutting head while pouring concrete in the pile hole above the cutting head. The hole wall is maintained stable with the help of liquid concrete of the pile body in the pile hole, and then reinforcement is inserted to form the pile.

[0004] The technical solution of the present invention is:

[0005] A deep quicksand layer cutting auxiliary device, comprising: a cutting head, a slag discharge pipe, a rotary spray pipe and a straightening ring;

[0006] The cutting head comprises a cutting panel and a cutting foot circumferentially arranged below the cutting panel;

[0007] The slag discharge pipe is detachably connected to the center of the cutting panel to discharge the mud or soil slag suspension formed by cutting at the bottom of the pile hole. A vibrator is provided on the upper part of the slag discharge pipe;

[0008] The rotary spray pipe is arranged in the slag discharge pipe and a rotary spray head is connected to the bottom;

[0009] The straightening collar is arranged on the outer periphery of the upper part of the slag discharge pipe, which is arranged on the ground to maintain the cutting auxiliary device in the center position of the pile hole during the downward movement.

[0010] In a further preferred embodiment, the cutting panel is a conical panel with a cone apex angle of 150 to 170°.

[0011] In a further preferred embodiment, a connecting through hole is provided in the middle of the cutting panel, and the cutting panel is connected to the slag discharge pipe through the connecting through hole.

[0012] In a further preferred embodiment, a slag discharge conduit or a slag discharge guide groove is provided on one side of the top of the slag discharge pipe.

[0013] In a further preferred embodiment, the jet spray pipe is a single pipe, a double pipe or a triple pipe. During jet spray cutting, the single pipe jet spray pipe only sprays high-pressure water, while the double pipe and the triple pipe spray high-pressure water and air; after the jet spray cutting is completed, the high-pressure water of the single pipe jet spray pipe is replaced with high-pressure cement slurry, while the double pipe and the triple pipe close the high-pressure water and air channels and only leave the high-pressure cement slurry channel, which is used to spray the high-pressure cement slurry to strongly stir and mix the soil residue at the bottom of the pile hole.

[0014] In a further preferred embodiment, the vibrator includes 2 to 3 vibrators evenly distributed along the circumference of the slag discharge pipe, and the vibrators are fixed to the slag discharge pipe by clamps.

[0015] In a further preferred embodiment, the straightening ring includes an outer ring and an inner ring, reinforcing ribs are radially arranged between the outer ring and the inner ring, vertical fixing ribs are vertically arranged under the outer ring, and when in use, the inner ring is inserted into the slag discharge pipe and fixed to the ground surface by the vertical fixing ribs.

[0016] The method for forming piles using the above-mentioned deep quicksand layer cutting auxiliary device comprises the following steps:

[0017] Step 1: Drill a hole to the top of the quicksand layer below the water level or to the groundwater level in the quicksand layer;

[0018] Step 2: Connect the slag discharge pipe and the cutting head, hang them into the pile hole, install the straightening ring and vibrator, and pour concrete into the pile hole;

[0019] Step 3: Place a rotary jet pipe with a rotary jet head into the slag discharge pipe, perform rotary jet drilling, and pour concrete while drilling until the cutting panel reaches the designed pile hole bottom elevation;

[0020] Step 4: Remove the jet nozzle with the jet nozzle, insert the grouting pipe under the cutting panel, remove the slag discharge pipe, and insert the steel cage into the pile hole to the designed elevation;

[0021] Step 5: After the pile body concrete reaches a certain strength, inject cement slurry into the cutting panel through the grouting pipe to form a pile.

[0022] Furthermore, after the cement slurry enters under the cutting panel in step 5, the cement slurry stirs the residue and forms a mixture with it, and also forms splitting channels in the soil near the cutting head and at the pile-soil interface to form a network-veined slurry liquid. After 3 to 7 days, the network-veined slurry liquid solidifies and the slurry reinforcement area is stably formed.

[0023] The above steps 4 to 5 may also be:

[0024] Step 4: Inject cement slurry into the cutting panel through the rotary jet pipe, and the displaced slurry and diluted cement slurry are discharged through the slag discharge pipe;

[0025] Step 5: Remove the jet nozzle with jet nozzle, dismantle the slag discharge pipe, insert the steel cage into the pile hole to the designed elevation, and after the concrete solidifies, the residue and cement slurry solidify to form a slurry solidified body to form a pile.

[0026] The beneficial effects of the present invention are:

[0027] In the deep quicksand layer cutting auxiliary device of the present invention, the cutting panel can separate the sediment in the pile hole from the concrete in a flowing state above it, and high-pressure water or high-pressure water vapor is ejected through the rotary nozzle of the rotary nozzle to cut the soil body, forming mud and discharging it to the designated position on the surface through the gap between the slag discharge pipe and the rotary nozzle. As the mud is discharged, the cutting head sinks as the blade foot cuts under the weight of the cutting auxiliary device, the gravity of the concrete overlying it, and the vibration of the vibrator. At the same time, the concrete surface in the pile hole also drops, and concrete is added to the pile hole in time. This cycle is repeated, and finally the cutting head reaches the designed pile hole bottom elevation, and then cement slurry is injected through the rotary nozzle or the grouting pipe, and the pile is formed after the steel cage is inserted. The deep quicksand layer cutting auxiliary device of the present invention solves the problem of thick sediment in the hole by continuously discharging the residue at the bottom of the pile hole. In addition, the problem of hole wall stability is solved by drilling and coordinating concrete pouring. The device is low in cost and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention is a schematic structural diagram of a deep quicksand layer cutting auxiliary device.

[0029] Figure 2 The structure diagram of the cutting head of a deep quicksand layer cutting auxiliary device of the present invention is shown in FIG. Figure 1 .

[0030] Figure 3 The structure diagram of the cutting head of a deep quicksand layer cutting auxiliary device of the present invention is shown in FIG. Figure 2 .

[0031] Figure 4 The present invention is a schematic structural diagram of a slag discharge pipe and a vibrator of a deep quicksand layer cutting auxiliary device.

[0032] Figure 5 The structure of the straightening ring of the deep quicksand layer cutting auxiliary device of the present invention is schematically shown. Figure 1 .

[0033] Figure 6 The structure of the straightening ring of the deep quicksand layer cutting auxiliary device of the present invention is schematically shown. Figure 2 .

[0034] Figure 7 The present invention is a schematic structural diagram of a deep quicksand layer cutting auxiliary device after being hoisted into a pile hole.

[0035] Figure 8 This is a schematic diagram of one embodiment of a deep quicksand layer cutting auxiliary device of the present invention.

[0036] Fig. 9 This is a schematic diagram of a second embodiment of a deep quicksand layer cutting auxiliary device according to the present invention.

[0037] In the accompanying drawings, 1 is a cutting head, 11 is a cutting panel, 12 is a blade foot, 13 is a connecting through hole, 2 is a slag discharge pipe, 21 is a slag discharge conduit, 3 is a rotary spray pipe, 31 is a rotary spray head, 4 is a vibrator, 5 is a straightening ring, 51 is an outer ring, 52 is an inner ring, 53 is a reinforcing rib, 54 is a vertical fixing rib, 6 is a pile hole, 7 is a residue, 71 is a residue suspension, 81 is a quicksand layer, 82 is a soil layer, 9 is concrete, and 10 is a steel cage. DETAILED DESCRIPTION

[0038] The present invention is described in more detail below through specific implementation modes to facilitate understanding of the technical solution of the present invention, but is not intended to limit the protection scope of the present invention.

[0039] Example 1: A device for assisting cutting of thick quicksand layers

[0040] like Figure 1 , 7 As shown, the deep quicksand layer cutting auxiliary device of this embodiment includes: a cutting head 1, a slag discharge pipe 2, a rotary spray pipe 3 and a straightening ring 5;

[0041] like Figure 2 and Figure 3 As shown, the cutting head 1 includes a cutting panel 11 and a blade foot 12 circumferentially arranged below the cutting panel 11. The cutting panel 11 is a conical panel with a cone top angle of 150-170°, a cone bottom outer dimension slightly larger than the designed diameter of the drill hole, and a reinforced concrete precast plate with a plate thickness of 100-200 mm. A connecting through hole 13 is arranged in the middle of the cone top of the cutting panel 11, and the cutting panel 11 is connected to the slag discharge pipe 2 through the connecting through hole 13. Specifically, a steel pipe with an inner thread or a bayonet is pre-set in the connecting through hole 13 as a connecting port of the slag discharge pipe 2, and the inner diameter of the connecting port is 100-300 mm. The blade foot 12 is a steel ring with a blade edge at the bottom, with a height of 200-500 mm and a steel ring wall thickness of 3-6 mm, or the blade foot 12 is a reinforced concrete ring with a steel blade edge at the bottom, and the ring wall thickness is 100 mm. The blade foot 12 and the cutting panel 11 can be cast as a whole or a combination.

[0042] The slag discharge pipe 2 is detachably connected to the center of the cutting panel 11, and is used to discharge the mud or soil slag suspension formed by cutting at the bottom of the pile hole. A vibrator 4 is provided on the upper part of the slag discharge pipe 2, and a slag discharge conduit 21 or a slag discharge guide groove is provided on one side of the top of the slag discharge pipe 2. The slag discharge pipe 2 is made of a steel pipe with an inner diameter of 100 to 300 mm and a wall thickness of 2 to 4 mm, and the lower part is connected to the cutting panel 11 by an inner thread or a bayonet. When the designed drilling depth is large and one section of the slag discharge pipe 2 cannot meet the length requirement, multiple sections of the slag discharge pipe 2 are required to be threadedly connected. In order to facilitate the connection and unloading of the slag discharge pipe 2, except for the lowermost section of the slag discharge pipe 2 which is complete, the upper extended slag discharge pipe 2 is composed of two halves, and a sealing strip is provided at the joint of the halves.

[0043] The vibrator 4 includes 2 to 3 micro vibrators evenly distributed along the slag discharge pipe 2. The vibrator is fixed to the slag discharge pipe 2 by a clamp. Figure 4 When the micro vibrator is fully operational, it will promote the cutting of the blade foot 12, the sinking of the cutting panel 11, and the downward movement and compaction of the concrete 9 in the pile hole 6; when it is partially operational, it is used to adjust the slag discharge pipe 2 and the cutting head 1, and to correct the deviation of the blade foot 12. The correction is based on the activity of the rotary spray head 31 inserted into the slag discharge pipe 2 or the deviation of the slag discharge pipe 2.

[0044] The jet spray pipe 3 is arranged in the slag discharge pipe 2 and is connected to a pointed jet spray head 31 at the bottom. The jet spray pipe 3 is a single pipe, a double pipe or a triple pipe. During jet spray cutting, the single jet spray pipe 3 only sprays high-pressure water, while the double pipe and the triple pipe spray high-pressure water and air; after the jet spray cutting is completed, the high-pressure water of the single jet spray pipe 3 is replaced with high-pressure cement slurry, while the double pipe and the triple pipe close the high-pressure water and air channels and only leave the high-pressure cement slurry channel, which is used to spray the high-pressure cement slurry to strongly stir and mix the soil residue at the bottom of the pile hole 6.

[0045] like Figure 5 As shown, the straightening ring 5 is sleeved on the outer periphery of the upper part of the slag discharge pipe 2, which is arranged on the ground to maintain the cutting auxiliary device in the center position of the pile hole 6 during the downward movement. The straightening ring 5 includes an outer ring 51 and an inner ring 52, and a reinforcing rib 53 is radially arranged between the outer ring 51 and the inner ring 52. A vertical fixing rib 54 is vertically arranged under the outer ring 52. When in use, the inner ring 52 is sleeved into the slag discharge pipe 2 and fixed to the ground surface by the vertical fixing rib 54. Specifically, the diameter of the inner ring 52 of the straightening ring 5 is slightly larger than the outer diameter of the slag discharge pipe 2, and the diameter of the outer ring 51 is preferably 200 to 600 mm larger than the diameter of the pile hole 6. The straightening ring 5 is made of round steel bars with a diameter of 20 to 28 mm. If the rigidity is insufficient, an intermediate ring can be added between the inner ring 52 and the outer ring 51, and a vertical fixing steel bar nail can be arranged under the intermediate ring. In order to facilitate installation and disassembly, the straightening ring 5 can be made into two half-open shapes, such as Figure 6 shown.

[0046] Example 2 Implementation Method 1 of the Deep Quicksand Layer Cutting Assistance Device

[0047] like Figure 8 As shown,

[0048] 1. Drill the upper pile hole.

[0049] Use conventional methods to drill holes to the top of the quicksand layer below the water level (the groundwater level is higher than the top of the quicksand layer) or to the groundwater level in the quicksand layer (the groundwater level is lower than the top of the quicksand layer). Figure 8 (a).

[0050] 2. Assemble the cutting auxiliary device, hang it in the pile hole, and pour concrete.

[0051] Connect the slag discharge pipe to the cutting head and place it into the pile hole through the lifting equipment. Install the straightening ring at the hole mouth, install the vibrator on the upper end of the slag discharge pipe, and connect it to the slag discharge conduit or guide groove. Then pour concrete into the pile hole to the vicinity of the hole mouth. Figure 8 (b).

[0052] 3. Jet jet drilling and pouring concrete while drilling.

[0053] Place a jet pipe with a jet head in the slag discharge pipe, and connect the jet pipe to the drive device. Start the drive device, the jet pipe and the jet head rotate, and a high-pressure water and air jet (Note: the single-tube jet method only sprays high-pressure water, while the double-tube and triple-tube methods spray high-pressure water and air) is ejected from the jet head to cut off the soil inside the cutting head and near its lower opening, and form mud. The mud overflows to the surface along the gap between the jet pipe and the slag discharge pipe, and is discharged into the mud pool through the slag discharge conduit or guide groove on the surface.

[0054] As the mud is discharged, the cutting head sinks with the blade foot under the weight of the cutting auxiliary device, the gravity of the concrete above it, and the vibration of the vibrator. At the same time, the concrete surface in the pile hole also drops, and concrete is added to the pile hole in due course. In this way, "cutting soil → mud discharge → cutting head moves down → concrete surface drops → adding concrete" is repeated, and finally the cutting head reaches the designed pile hole bottom elevation, and the rotary spraying equipment is shut down. Figure 8 (c)(d).

[0055] During the jet grouting process, if the slag discharge pipe is found to be deviated (at this time, there is a collision and friction sound between the jet grouting pipe and the slag discharge pipe), the slag discharge pipe is pushed to the other side, and at the same time, only the micro vibrator on the opposite side is turned on to generate eccentric vibration, and the slag discharge pipe 2 gradually returns to the middle position, and the cutting head 1 is adjusted.

[0056] If the sinking of the slag discharge pipe during jet drilling is not synchronized with the sinking of the jet tube, the sinking speed of the jet tube should be slowed down, or the vibrator should be turned on to make all the micro-vibrators in the vibrator work. At this time, the slag discharge pipe vibrates, prompting the cutting head to vibrate and accelerate the undercutting of the cutting head blade.

[0057] When the bottom enters the hard soil layer or coarse-grained soil layer (the bearing layer at the pile end), the liquid and gas pressure in the jet nozzle, the jet nozzle sinking speed, etc. are adjusted in time. Except for some coarse particles in the coarse-grained soil layer that will remain, the fine-grained soil or the fine particles in the coarse-grained soil layer will be converted into mud and discharged from the pile hole.

[0058] 4. Remove the rotary jet pipe, insert the PVC grouting pipe, remove the slag discharge pipe, and insert the steel cage.

[0059] Remove the jet pipe and jet head, insert the PVC grouting pipe with the bottom end closed by a one-way valve to the bottom of the cutting head, then remove the slag discharge pipe, slowly pull it up while vibrating it, the concrete will fill the gap left after pulling out the pipe, part of it will flow into the cutting panel to replace the mud, the mud and the slag discharge pipe will float up (Note: the specific gravity of the mud is significantly less than that of the concrete), while the mud in the original slag discharge pipe will float up in the pipe. In this way, the pipe will be lifted while vibrating until the slag discharge pipe is moved out of the pile hole, leaving the PVC grouting pipe in the hole. Subsequently, insert the steel cage into the pile hole to the designed elevation. If there is insufficient concrete in the pile hole, add more concrete to the pile hole and compact it with a special concrete vibrator. Figure 8 (e).

[0060] 5. Grouting to solidify the pile bottom.

[0061] When the concrete in the pile hole reaches a certain strength or 28 days after the concrete in the hole is poured, first inject cement slurry into the grouting pipe to replace the air therein, and then inject 2-3MPa cement slurry into the cutting panel through the grouting pipe. The high-pressure cement slurry flows into the cutting head, stirring the residue therein and forming a residue mixture with it. It also forms splitting channels in the soil near the cutting head and at the pile-soil interface, forming a network of veined slurry liquid. When the slurry flow input is basically 0 or the grouting pressure is maintained for 1 hour, close the grouting pipe and the grouting is completed. After 3-7 days, the network-veined slurry liquid solidifies, the slurry reinforcement area is stably formed, and the grouting pipe exposed on the surface is cut off to form a pile. Figure 8 (f)(g).

[0062] Example 3 Implementation Method 2 of the Deep Quicksand Layer Cutting Assistance Device

[0063] like Fig. 9 As shown, the specific implementation steps are as follows:

[0064] 1. Same as 1 in implementation method 1, such as Fig. 9 (a).

[0065] 2. Same as 2 in implementation method 1, such as Fig. 9 (b).

[0066] 3. Same as 3 in implementation method 1, such as Fig. 9 (c)(d).

[0067] 4. Grouting solidification residue.

[0068] Open the cement slurry jet channel of the rotary jet pipe (for triple-tube rotary jet pipe) or replace it with cement slurry jet. The cement slurry is ejected from the rotary jet head at a pressure of 2-3 MPa, stirring the residue to form a slurry mixture. At the same time, the displaced mud and diluted cement slurry are discharged into the ground waste slurry pool through the slag discharge pipe. When the waste slurry to be discharged is basically not diluted cement slurry, turn off the cement slurry rotary jet. Fig. 9 (e).

[0069] 5. Remove the slag discharge pipe and insert the steel cage to form a pile.

[0070] Remove the jet pipe and jet head, remove and lift the slag discharge pipe 3 to 5 cm, vibrate the slag discharge pipe for 5 to 10 minutes, and then pull out the slag discharge pipe while vibrating. As the slag discharge pipe vibrates, the concrete in the pile hole will flow into the space left by pulling out the slag discharge pipe. The concrete in the pile hole will be compacted again, and the mud or cement slurry in the slag discharge pipe will float up with the pipe until the slag discharge pipe is moved out of the pile hole. Then, insert the steel cage into the pile hole to the designed elevation. If there is insufficient concrete in the pile hole, add more concrete to the pile hole and compact it with a special concrete vibrator. After the concrete solidifies, the residue and cement slurry solidify to form a slag slurry solid body and then the pile is formed. Fig. 9 (f)(g).

[0071] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A deep quicksand layer cutting auxiliary device, characterized in that: include: A cutting head (1), a slag discharge pipe (2), a rotary spray pipe (3) and a straightening ring (5); The cutting head (1) comprises a cutting panel (11) and a blade foot (12) circumferentially arranged below the cutting panel (11); the blade foot (12) is a steel ring with a cutting edge at the bottom end, or the blade foot (12) is a reinforced concrete ring with a steel cutting edge at the bottom end; The slag discharge pipe (2) is detachably connected to the center of the cutting panel (11), and a vibrator (4) is arranged on the upper part of the slag discharge pipe (2); the vibrator (4) includes 2 to 3 vibrators evenly distributed along the circumference of the slag discharge pipe (2), and the vibrators are fixed to the slag discharge pipe (2) by means of clamps; when all the vibrators are working, they will promote the cutting of the blade foot (12), the sinking of the cutting panel (11), and the downward movement and compaction of the concrete (9) in the pile hole (6); when some of the vibrators are working, they are used to adjust the slag discharge pipe (2) and the cutting head (1), and correct the deviation of the blade foot (12), and the correction is based on the activity of the rotary nozzle (31) inserted into the slag discharge pipe (2) or the deviation of the slag discharge pipe (2); The rotary jet pipe (3) is arranged in the slag discharge pipe (2) and is connected to a rotary jet head (31) at the bottom. The rotary jet pipe (3) is a single pipe, a double pipe or a triple pipe. During rotary jet cutting, the single-tube rotary jet pipe (3) only sprays high-pressure water, while the double pipe and the triple pipe spray high-pressure water and air. After the rotary jet cutting is completed, the high-pressure water in the single-tube rotary jet pipe (3) is replaced with high-pressure cement slurry, while the double pipe and the triple pipe close the high-pressure water and air channels and only leave the high-pressure cement slurry channel, which is used to spray the high-pressure cement slurry to strongly stir and mix the soil residue at the bottom of the pile hole (6). The straightening ring (5) is sleeved on the outer circumference of the upper part of the slag discharge pipe (2).

2. A deep quicksand layer cutting auxiliary device according to claim 1, characterized in that: The cutting panel (11) is a conical panel with a cone apex angle of 150 to 170 degrees.

3. A deep quicksand layer cutting auxiliary device according to claim 1, characterized in that: A connecting through hole (13) is provided in the middle of the cutting panel (11), and the cutting panel (11) is connected to the slag discharge pipe (2) through the connecting through hole (13).

4. A deep quicksand layer cutting auxiliary device according to claim 1, characterized in that: A slag discharge conduit (21) is provided on one side of the top of the slag discharge pipe (2).

5. The deep quicksand layer cutting auxiliary device according to claim 1, characterized in that: The straightening ring (5) comprises an outer ring (51) and an inner ring (52), a reinforcing rib (53) is radially arranged between the outer ring (51) and the inner ring (52), and a vertical fixing rib (54) is vertically arranged below the outer ring (51).

6. A method for forming piles using the deep quicksand layer cutting auxiliary device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: Drilling a pile hole (6) to the top surface of the quicksand layer below the water level or to the groundwater level in the quicksand layer; Step 2: Connect the slag discharge pipe (2) and the cutting head (1), hang them into the pile hole (6), install the straightening ring (5) and the vibrator (4), and pour concrete (9) into the pile hole (6); Step 3: inserting a rotary spray pipe (3) with a rotary spray head (31) into the slag discharge pipe (2), and performing rotary spray drilling, pouring concrete while drilling, until the cutting panel (11) reaches the designed bottom elevation of the pile hole (6); Step 4: remove the rotary spray pipe (3) with the rotary spray head (31), insert the grouting pipe to the bottom of the cutting panel (11), remove the slag discharge pipe (2), and insert the steel cage (10) into the pile hole (6) to the designed elevation; Step 5: After the pile body concrete reaches a certain strength, cement slurry is injected into the cutting panel (11) through the grouting pipe to form a pile.

7. The method for forming piles using a deep quicksand layer cutting auxiliary device according to claim 6, characterized in that: After the cement slurry enters the bottom of the cutting panel (11) in step 5, the cement slurry stirs the residue (7) and forms a mixture with it. It also forms a splitting channel in the soil near the cutting head (1) and at the pile-soil interface to form a network vein slurry liquid. After 3 to 7 days, the network vein slurry liquid solidifies and the slurry reinforcement area is stably formed.

8. The method for forming piles using a deep quicksand layer cutting auxiliary device according to claim 6, characterized in that: Steps 4 to 5 can also be: Step 4: injecting cement slurry into the cutting panel (11) through the rotary spray pipe (3), and displaced slurry and diluted cement slurry are discharged through the slag discharge pipe (2); Step 5: Remove the jet nozzle (3) with the jet nozzle (31), remove the slag discharge pipe (2), insert the steel cage (10) into the pile hole (6) to the designed elevation, solidify the concrete (9), and solidify the residue (7) and cement slurry to form a slag slurry solidified body to form a pile.

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