Square anchoring pile mechanical hole-forming construction method

Abstract

The invention relates to the technical field of pile hole construction, in particular to a mechanical hole-forming construction method for a square anchoring pile, and mainly solves the technical problems of poor construction quality, low efficiency, high danger coefficient and high cost of manual pile forming of the existing square anchoring pile. The mechanical hole forming construction method comprises the steps that S1, site leveling construction is conducted; s2, lock mouth construction; s3, the rotary drilling machine is in place; s4, a round cutting tooth bailing drill bit is adopted for sequentially conducting guide hole drilling and multi-hole drilling till drilling of the main body part of the square pile hole is completed; s5, the hole wall of the square pile hole is trimmed through a square milling and digging drill bit, slag is fished through a round cutting tooth sand fishing drill bit, and the square milling and digging drill bit and the slag fishing drill bit are repeatedly operated till a complete square pile hole is formed; s6, a round cutting tooth bailing drill bit is adopted for conducting preliminary hole cleaning on the hole bottom; s7, thoroughly cleaning the bottom of the hole by adopting a square pile hole cleaner; s8, a reinforcement cage is installed in the square pile hole; and S9, concrete is poured, and square pile hole construction is completed.

Description

Technical Field

[0001] The invention relates to the technical field of pile hole construction, and in particular to a square anchor pile mechanical hole forming construction method. Background Art

[0002] With the continuous development of my country's social economy, some national infrastructure construction projects such as highways or high-speed railways are located in earthquake zones, mountainous areas and other areas, which are prone to geological disasters such as landslides and mud-rock flows. The edge support requirements are relatively high, and the construction drawing design has added the design support elements of square anchor piles.

[0003] Square anchor piles, also known as square piles, are a type of foundation structure that has gradually gained attention in the field of construction in recent years. Compared with traditional circular anchor piles, they have the following advantages: First, under the action of horizontal sliding force, the pile body will produce bending moment, and the bending resistance of the rectangular cross-section is stronger than that of the circular cross-section; second, the rectangular cross-section can be configured with steel bars according to the characteristics of the actual tensile and compressive zones of the anti-sliding pile, which can fully utilize the material properties; third, the rectangular support pile has a larger design aperture and more specifications.

[0004] In the prior art, square anchor piles are mostly drilled manually, and the construction quality and efficiency are generally not ideal. In case of water gushing, a series of drainage measures must be taken before manual excavation can be continued, which has a high risk factor and high cost. Summary of the invention

[0005] In order to overcome the technical defects of poor construction quality, low efficiency, high risk factor and high cost in the existing manual pile construction of square anchor piles, the present invention provides a mechanical hole-forming construction method for square anchor piles.

[0006] The square anchor pile mechanical hole forming construction method provided by the present invention comprises: S1. Site leveling construction; S2. Locking construction; S3. The rotary drilling rig is in place; S4. Use a round pick sand drill bit to perform pilot hole drilling and multi-hole drilling in sequence until the main part of the square pile hole is drilled; S5. Use a square milling drill bit to trim the wall of the square pile hole, and use a round pick sand drill bit to remove slag, and the two are reciprocated until a complete square pile hole is formed; S6. Use a round pick sand drill bit to perform preliminary cleaning of the hole bottom; S7. Use a square pile hole cleaner to thoroughly clean the bottom of the hole; S8. Install the steel cage in the square pile hole; S9. Pour concrete and complete the construction of square pile holes.

[0007] Optionally, step S2 includes the following sub-steps: S21. Measurement and setting out; S22. Locking excavation; S23.Rebar binding; S24. Formwork support; S25. Locking concrete pouring; S26. Remove the mold and maintain health.

[0008] Optionally, in step S4, for a pile foundation with a stable underlying structure, a four-corner hole method is used for hole drilling; for a pile foundation with an unstable underlying structure, a single hole method is used for hole drilling.

[0009] Optionally, the square milling drill bit includes a connecting box, a pin and a power assembly, the upper end of the connecting box is used to connect the drill rod, the power assembly includes two symmetrically arranged power heads, and two pins are provided corresponding to the power heads. The power head includes a mounting frame, a hydraulic motor, a transmission assembly and a cutting head. The top end of the mounting frame is rotatably connected to the connecting box through a corresponding pin, the cutting head is installed at the bottom end of the mounting frame with its axis parallel to the pin, and the hydraulic motor is installed in the middle of the mounting frame and is transmission-connected to the cutting head through the transmission assembly.

[0010] Optionally, the square pile hole cleaner includes a connector, a triangular seat and a square box shell which are fixedly connected in sequence from top to bottom, the bottom end of the square box shell is open to form a slag inlet, a group of opposite sides of the slag inlet are equipped with scrapers, the scrapers are hinged to the edges corresponding to the slag inlet through a rotating shaft, the rotating shaft is arranged along the edges corresponding to the slag inlet, and a rotating power component is also installed in the square box shell, the rotating power component is connected to the two rotating shafts to drive the two scrapers to rotate synchronously.

[0011] Optionally, the lower end of the scraper is a pointed end.

[0012] Optionally, the square pile hole cleaner also includes a partition, which is fixed inside the square box shell and arranged horizontally to separate the inner cavity of the square box shell into an installation space located at the upper part and a slag feeding space located at the lower part, and the rotating power part is located in the installation space.

[0013] Optionally, the rotating power component is an oil motor.

[0014] Optionally, the square pile hole cleaner further comprises a slag suction component, and a slag suction port of the slag suction component penetrates the partition plate to communicate with the slag inlet space.

[0015] The technical solution provided by the present invention has the following advantages compared with the prior art: The square anchor pile mechanical hole construction method provided by the present invention can realize mechanized hole making through the cooperation of a circular pick sand drill bit, a square milling drill bit and a square pile hole cleaner. Compared with the manual hole making scheme, it can greatly improve the construction efficiency and reduce the labor cost, and can reduce the time workers work in dangerous environments, thereby improving the construction safety. In addition, compared with the traditional manual hole making processes such as water-grinding drilling and blasting, the mechanical hole making generates less noise, which can reduce the noise pollution to the surrounding villages; at the same time, the mechanical hole making can more accurately control the operation area, reduce the diffusion of dust and particulate matter, and is more energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A flow chart showing a mechanical hole-forming construction method according to an embodiment of the present invention; Figure 2 A schematic diagram showing the structure of a square milling drill bit according to an embodiment of the present invention; Figure 3 A schematic structural diagram of a square pile hole cleaner according to an embodiment of the present invention is shown.

[0019] In the figure: 110, connecting box body; 120, pin shaft; 130, power assembly; 131, mounting frame; 132, hydraulic motor; 133, transmission assembly; 134, cutting head; 200, drill rod; 310, connector; 320, triangular seat; 330, square box shell; 340, scraper; 350, rotating shaft; 360, rotating power part; 370, partition; 380, slag suction assembly. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0021] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Combine the following Figures 1 to 3 The specific embodiments of the present invention are described in detail.

[0024] This embodiment provides a square anchor pile mechanical hole construction method, including steps S1 to S9.

[0025] S1. Site leveling construction.

[0026] It should be noted that the leveling of the site must meet the following four requirements: First, the flatness and bearing capacity of the site should meet the requirements of the rotary drilling rig instruction manual. When the instruction manual does not make specific requirements, the mast inclination should be less than 2 degrees, and the foundation bearing capacity should meet the requirements or take other effective guarantee measures; Second, the overhead obstacles at the construction site should be at a distance that meets the requirements of safety regulations; Third, the pile foundation construction near the slope of the construction site should be carried out after the slope treatment is completed; Fourth, surface drainage measures should be taken around the pile foundation to prevent surface water from damaging the site.

[0027] S2. Locking construction includes the following steps: S21. Surveying and setting out: According to the coordinates of the design drawings, the surveyor uses a total station to accurately lay out the structural dimension points in the lock mouth and measure the surface elevation; S22. Excavation of the lock mouth: The soil in the middle of the lock mouth is excavated by an excavator, and the part 20 cm away from the boundary point and 20 cm from the bottom of the lock mouth is excavated manually. The size of the lock mouth after forming is 20 cm larger than the designed aperture; S23. Rebar binding: After the excavation of the foundation pit is completed, the rebar binding work shall be carried out; the types, models and specifications of the rebars used for the lock shall be checked according to the construction drawings, and a material plan shall be formulated. After the incoming materials are accepted and qualified, the rebar processing and binding technical instructions shall be issued, and the processing and binding operations shall be carried out; the rebars shall be processed in the rebar processing plant; during the rebar construction process, the processing and binding shall be carried out strictly in accordance with the specifications to ensure the quality of the overlap of various types of rebars; S24. Formwork support: After the reinforcement is tied, the formwork support should be erected; the formwork should be cleaned before supporting, and the formwork should be selected according to the construction plan; concrete should be poured after passing the supervisor's inspection; S25. Locking concrete pouring; C25 concrete is used; when pouring, it is poured in layers, and the thickness of each layer is not more than 50cm. Professional vibrators are assigned to vibrate to ensure the compactness of the concrete. During the pouring process, a dedicated person is assigned to check the entire support formwork system. If there is any formwork running or slurry leakage, reinforcement and remedial measures should be taken in time to ensure the quality of concrete pouring; S26. Formwork removal and curing: After the concrete is poured, it should be covered and cured in time. The formwork can be removed only after the concrete reaches a certain strength. The curing time must not be less than 7 days and the strength must not be less than 80%.

[0028] S3. The rotary drilling rig is in place.

[0029] It should be noted that the placement of the rotary drilling rig must meet the following three requirements: First, when the drilling rig is in place, check in advance whether the performance of the drilling rig is good, and perform debugging before construction to ensure that the drilling rig works normally; second, if the site at the pile position is soft, lay steel plates or replace the backfill to ensure that the drilling rig is stable and does not sink when working; third, check whether there are obstacles in the turning radius that affect the rotation.

[0030] S4. Use a round pick sand drill bit to carry out pilot hole drilling and re-hole drilling in sequence until the main part of the square pile hole is drilled.

[0031] It should be noted that the lead hole is the key to the square pile hole formation. It can understand the approximate geological structure of the pile and verify whether it is consistent with the geological survey report. If the hole collapse occurs, the square pile steel casing process will be used for construction. This embodiment adopts two different lead hole methods for different pile foundations: for pile foundations with stable underlying structures, the four-corner lead hole method is used for lead hole drilling; for pile foundations with unstable underlying structures, the single-hole lead hole method is used for lead hole drilling.

[0032] The advantages of the four-corner hole method are: 1. Good stability. For pile foundations with stable stratum structures, the four-corner hole method can increase the stability of the pile foundation and reduce the deviation and tilt during construction by drilling plum blossom-shaped holes at the four corners of the pile foundation; 2. Uniform force. Since the holes are distributed at the four corners of the pile foundation, the pile foundation is more evenly stressed, which is beneficial to improving the bearing capacity and overall stability of the pile foundation.

[0033] The disadvantages of the four-corner hole method are: 1. The construction is complicated. Compared with the single-hole hole method, the four-corner hole method requires more hole-drawing operations, which increases the complexity and time cost of construction; 2. The cost is relatively high. Since more holes need to be opened, material consumption and labor costs will also increase accordingly.

[0034] The advantages of the single-hole boring method are: 1. Simple construction. The single-hole boring method only needs to open a boring hole at one position of the pile foundation. The construction process is relatively simple, which can save time and labor costs; 2. Strong adaptability. For pile foundations with unstable stratum structures, the single-hole boring method can more effectively guide the drill bit into the predetermined position and reduce uncertainty and risks during the construction process.

[0035] The disadvantages of the single-hole boring method are: 1. Uneven force. Since the boring hole is only opened at one position of the pile foundation, the pile foundation may be unevenly stressed, affecting the stability and bearing capacity of the pile foundation; 2. Limitations. Under certain specific geological conditions, such as when the stratum structure is very complex or there are a large number of obstacles, the single-hole boring method may not be effectively implemented or the effect may be poor.

[0036] S5. Use a square milling drill bit to trim the wall of the square pile hole, and use a round pick sand drill bit to remove slag, and reciprocate the two operations until a complete square pile hole is formed.

[0037] It is easy to understand that the square hole drilling process of the rotary drilling rig is a process of trimming the wall of the preformed pile hole. The working principle is to effectively utilize the kinetic energy of the rotary drilling rig, and convert the horizontal rotational kinetic energy into longitudinal rotational kinetic energy through a complex kinetic energy transmission component mechanism, and then use the square pile drill bit actuator mechanism to perform excavation and trimming. Because a large amount of hole residue from the hole wall continuously falls into the bottom of the preformed hole during the trimming process, and the square pile drill bit does not have the function of taking soil, the process will be repeated by: square pile drill bit trimming → circular drill rig taking soil → square pile drill bit trimming → circular drill rig taking soil until a complete square pile hole is formed.

[0038] Specifically, the square milling drill bit of this embodiment includes a connecting box 110, a pin 120 and a power assembly 130. The upper end of the connecting box 110 is used to connect the drill rod 200. The power assembly 130 includes two symmetrically arranged power heads. Two pins 120 are provided corresponding to the power heads. The power head includes a mounting frame 131, a hydraulic motor 132, a transmission assembly 133 and a cutting head 134. The top of the mounting frame 131 is rotatably connected to the connecting box 110 through the corresponding pin 120. The cutting head 134 is installed at the bottom end of the mounting frame 131 and the axis is parallel to the pin 120. The hydraulic motor 132 is installed in the middle of the mounting frame 131 and is connected to the cutting head 134 through the transmission assembly 133. When in operation, by adjusting the position of the pin 120 and replacing the cutting head 134, it can meet the needs of square pile holes of different sizes, so that the two cutting heads 134 are respectively abutted against a set of opposite surfaces of the square pile hole for processing.

[0039] More specifically, the transmission assembly 133 may be a chain, a gear pair, or other commonly used transmission structures.

[0040] S6. Use a round pick sand drill bit to perform preliminary cleaning of the hole bottom.

[0041] Specifically, in this embodiment, the sediment at the four corners is first cleaned with a φ800mm hole cleaning drill, and then the entire hole bottom is cleaned with a φ2000mm hole cleaning drill, repeatedly sweeping the hole bottom from one end to the other until the sediment at the hole bottom is basically cleared.

[0042] S7. Use a square pile hole cleaner to thoroughly clean the bottom of the hole.

[0043] Specifically, the square pile hole cleaner of this embodiment includes a connector 310, a triangular seat 320 and a square box shell 330 which are fixedly connected in sequence from top to bottom. The bottom end of the square box shell 330 is open to form a slag inlet. A set of opposite sides of the slag inlet are equipped with scrapers 340. The scrapers 340 are hinged on the edges corresponding to the slag inlet through a rotating shaft 350. The rotating shaft 350 is arranged along the edges corresponding to the slag inlet. A rotating power member 360 is also installed in the square box shell 330. The rotating power member 360 is connected to the two rotating shafts 350 to drive the two scrapers 340 to rotate synchronously. When working, the connector 310 is connected to the drill rod 200, and the rotating power member 360 drives the two scrapers 340 to rotate synchronously to pick up the drill slag and form an inverted triangle slag inclusion space. Then the drill rod 200 pulls the entire square pile hole cleaner to pour the drill slag out of the hole. This is repeated several times to complete the cleaning of the bottom sediment of the hole until the bottom sediment of the hole is completely removed.

[0044] It should be noted that when the rotating power part 360 drives the scraper 340 to rotate, the scraper 340 must be driven down synchronously through the drill rod 200 so that the lower end of the scraper 340 always contacts the bottom of the hole, simulating manual movements to complete the picking up of sediment at the bottom of the hole.

[0045] More specifically, the scraper 340 of this embodiment has a pointed end at its lower end, which is more convenient for inserting into the sediment.

[0046] More specifically, the rotating power member 360 of this embodiment is an oil motor, which is connected to the hydraulic system of the drill pipe 200 through an oil inlet pipe and an oil outlet pipe to obtain power.

[0047] More specifically, the rotating power member 360 may drive the rotating shaft 350 to rotate via a chain, or may drive the rotating shaft 350 to rotate via other common transmission structures such as a gear set.

[0048] Furthermore, the square pile hole cleaner further includes a partition 370, which is fixed inside the square box shell 330 and arranged horizontally to separate the inner cavity of the square box shell 330 into an installation space located at the upper part and a slag entry space located at the lower part, and the rotating power member 360 is located in the installation space. The partition 370 can prevent the drilling slag from entering the installation space, thereby preventing the drilling slag from affecting the rotating power member 360 and other structures.

[0049] Furthermore, the square pile hole cleaner further comprises a slag suction assembly 380, the slag suction port of the slag suction assembly 380 penetrates the partition plate 370 to communicate with the slag inlet space. As an auxiliary mechanism, the slag suction assembly 380 can absorb part of the sediment by negative pressure to improve the hole cleaning efficiency.

[0050] S8. Install the steel cage in the square pile hole.

[0051] It should be noted that the processing of steel cages must meet the following requirements: First, the steel cages are connected and made as a whole on site, and the steel joints should be welded or mechanically connected; second, the number of joints of the main bars of the same section of the steel cage shall not exceed 50%; the length of the double-sided lap weld shall not be less than 5d, and the length of the single-sided lap weld shall not be less than 10d; third, the main bars of the steel cage should be equipped with protective layer spacers, and the vertical spacing of each group of protective layer spacers should not be greater than 3m, and they should be symmetrically set, and each group should not be less than 4 pieces; fourth, the allowable deviation of the production and installation of the steel cage should comply with relevant regulations. The steel bars are made in the base processing room, and the internal technical personnel propose the processing plan according to the design drawings and specifications, and they are processed into semi-finished products in the processing plant; fifth, the shape and size of the steel bars must meet the design requirements; sixth, the raw materials of the steel bars must be classified and stacked neatly after entering the site, with the upper cover and the lower pad, and the surface of the steel bars should be clean, without damage, oil stains, paint stains and rust. The steel bars are straight and have no local twists and turns.

[0052] It should be noted that there are two ways to install the steel cage depending on the size of the site. One is to tie it up at the hole mouth in a limited site, and the other is to tie it up as a whole and use a crane to lift it into the hole. At present, the first method is basically used to tie it up at the hole mouth and gradually lower it into the hole.

[0053] S9. Pour concrete and complete the construction of square pile holes.

[0054] It is easy to understand that concrete pouring includes two steps: lowering the pipe and pouring.

[0055] When laying down the conduit, attention should be paid to: a. Before placing the conduit, the hole depth and the total length of the conduit should be calculated. The bottom section of the conduit is generally 4 to 6 meters long, and the standard section is generally 2 to 3 meters long. 2 to 3 short sections of 1.0 meters can be placed on the upper part to adjust the total length of the conduit; b. During the conduit docking process, a sealing ring should be added to prevent water leakage, and the thread should be tightened; when placing the conduit, the position of the conduit in the hole should be ensured to be centered to prevent collision with the steel cage frame.

[0056] When pouring, attention should be paid to the following: a. After pouring concrete into the bottom of the hole, detect the height of the concrete surface in the hole and calculate the buried depth of the conduit. When pouring the first batch of concrete, the conduit is 25 to 40 cm away from the bottom of the hole and the buried depth is greater than 1 m. When pouring later, the buried depth of the conduit is controlled between 2 and 6 m; b. Concrete should be poured continuously without interruption. The time for removing the conduit should be shortened as much as possible. The pouring time of each pile should be arranged to be completed before the initial setting of the first batch of concrete. It should not be stopped until the concrete is poured to 50 cm to 100 cm above the designed elevation of the pile top, depending on the thickness of the sediment at the bottom of the hole; c. During the pouring process, the position of the top surface of the concrete in the hole should be measured, and the buried depth of the conduit should be adjusted in time. The buried depth of the conduit should be controlled between 2 and 6 m, and the minimum buried depth should not be less than 1 m. When the pouring speed is faster, the conduit is stronger and has sufficient lifting capacity, the buried depth can be appropriately increased, but it should not exceed 8 m; d. The conduit is pulled out after the pouring is completed.

[0057] The above is only a specific implementation of the present invention, which enables those skilled in the art to understand or implement the present invention. Although detailed descriptions are given with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. A square anchor pile mechanical hole construction method, characterized in that: include: S1. Site leveling construction; S2. Locking construction; S3. The rotary drilling rig is in place; S4. Use a round pick sand drill bit to perform pilot hole drilling and multi-hole drilling in sequence until the main part of the square pile hole is drilled; S5. Use a square milling drill bit to trim the wall of the square pile hole, and use a round pick sand drill bit to remove slag, and the two are reciprocated until a complete square pile hole is formed; S6. Use a round pick sand drill bit to perform preliminary cleaning of the hole bottom; S7. Use a square pile hole cleaner to thoroughly clean the bottom of the hole; S8. Install the steel cage in the square pile hole; S9. Pour concrete and complete the construction of square pile holes.

2. The square anchor pile mechanical hole construction method according to claim 1 is characterized in that: Step S2 includes the following sub-steps: S21. Measurement and setting out; S22. Locking excavation; S23.Rebar binding; S24. Formwork support; S25. Locking concrete pouring; S26. Remove the mold and maintain health.

3. The square anchor pile mechanical hole construction method according to claim 1 is characterized in that: In step S4, for pile foundations with stable underlying structures, the four-corner hole method is used for hole drilling; for pile foundations with unstable underlying structures, the single-hole hole method is used for hole drilling.

4. The square anchor pile mechanical hole construction method according to claim 1 is characterized in that: The square milling drill bit comprises a connecting box (110), a pin shaft (120) and a power assembly (130). The upper end of the connecting box (110) is used to connect a drill rod (200). The power assembly (130) comprises two symmetrically arranged power heads. Two pin shafts (120) are provided corresponding to the power heads. The power head comprises a mounting frame (131), a hydraulic motor (132), a transmission assembly (133) and a cutting head (134). The top end of the mounting frame (131) is rotatably connected to the connecting box (110) via the corresponding pin shaft (120). The cutting head (134) is mounted at the bottom end of the mounting frame (131) with its axis parallel to the pin shaft (120). The hydraulic motor (132) is mounted in the middle of the mounting frame (131) and is transmission-connected to the cutting head (134) via the transmission assembly (133).

5. The square anchor pile mechanical hole construction method according to claim 1 is characterized in that: The square pile hole cleaner comprises a connector (310), a triangular seat (320) and a square box shell (330) which are fixedly connected in sequence from top to bottom. The bottom end of the square box shell (330) is open to form a slag inlet. A set of opposite sides of the slag inlet are provided with scrapers (340). The scrapers (340) are hinged to the edges corresponding to the slag inlet via a rotating shaft (350). The rotating shaft (350) is arranged along the edges corresponding to the slag inlet. A rotating power member (360) is also provided in the square box shell (330). The rotating power member (360) is transmission-connected to the two rotating shafts (350) to drive the two scrapers (340) to rotate synchronously.

6. The square anchor pile mechanical hole construction method according to claim 5 is characterized in that: The lower end of the scraper (340) is a pointed end.

7. The square anchor pile mechanical hole construction method according to claim 5 is characterized in that: The square pile hole cleaner further comprises a partition (370), wherein the partition (370) is fixed inside the square box shell (330) and arranged horizontally to separate the inner cavity of the square box shell (330) into an installation space located at an upper portion and a slag feeding space located at a lower portion, and the rotating power member (360) is located in the installation space.

8. The square anchor pile mechanical hole construction method according to claim 7 is characterized in that: The rotating power component (360) is an oil motor.

9. The square anchor pile mechanical hole construction method according to claim 7 is characterized in that: The square pile hole cleaner further comprises a slag suction component (380), wherein a slag suction port of the slag suction component (380) penetrates the partition plate (370) to communicate with the slag inlet space.

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