Hole cleaning device and construction technology for large-diameter bored piles under complex geological conditions

Abstract

This invention discloses a borehole cleaning device for large-diameter bored piles under complex geological conditions, comprising: a cleaning support component, including an upper support component, a cleaning and casting rotation transmission component, and a lower partition support component, wherein the upper and lower partition supports provide circumferential support for the circumferential rotation of the connected cleaning and casting rotation transmission component within the borehole; a wall-protecting cleaning component, including a rotating wall-protecting component, a wall-protecting power component, and an upper cleaning component, wherein the rotating wall-protecting component rotates circumferentially on the cleaning and casting rotation transmission component, and is driven by the connected wall-protecting power component to move axially along the cleaning and casting rotation transmission component; and a bottom cleaning component for cleaning the bottom of the borehole below the lower partition support component. This invention can significantly improve the quality and efficiency of borehole cleaning, significantly improve the casting efficiency and pile quality of bored piles, and significantly reduce the detachment and collapse of borehole wall residue.

Description

Technical Field

[0001] This invention relates to the field of pile hole cleaning technology, and more specifically, to a hole cleaning device and construction process for large-diameter bored piles under complex geological conditions. Background Technology

[0002] With the continuous development of urban infrastructure, such as bridges and high-rise buildings, which are increasingly characterized by larger spans and greater heights, higher bearing capacity is required for pile foundations. Drilled cast-in-place piles are currently the most widely used type of pile foundation. They are constructed by creating a hole in the foundation soil on-site using methods such as mechanical drilling, steel pipe extrusion, or manual excavation, then placing a reinforcing cage inside and pouring concrete. The construction of existing drilled cast-in-place piles is also continuously developing towards larger diameter and ultra-deep piles. Due to the influence of complex geological conditions and the surrounding environment, the technical complexity and construction difficulty are unprecedented. After the final inspection confirms that the borehole fully meets the design requirements, the bottom of the hole should be cleaned immediately to avoid prolonged waiting, which could lead to mud sedimentation and borehole collapse. During the concrete pouring process after pile drilling, residues may remain at the bottom of the hole and fall off the hole wall during the pouring process. Currently, mechanical cleaning methods are commonly used for hole cleaning. These methods mainly include grouting, grout replacement, cuttings removal, and mortar replacement. Among these, grouting is the most thorough and widely used method. Grouting involves using suction to extract the grout containing drill cuttings from the hole and replenishing it with suitable mud from the hole opening. However, during the grouting process, the hole wall and opening are prone to debris detachment and collapse, making grouting unsuitable for large-diameter, ultra-deep piles and drilling in complex geological formations where the hole wall is prone to collapse. Other cleaning methods are also difficult to clean the hole completely, and incomplete cleaning can lead to interlayering, pile breakage, or even pile failure, resulting in serious losses. Therefore, it is essential to thoroughly clean the sediment at the bottom of the hole during construction. Summary of the Invention

[0003] To overcome the above-mentioned defects, this invention provides a hole cleaning device and construction process for large-diameter bored piles under complex geological conditions, specifically adopting the following technical solution:

[0004] A hole cleaning device for large-diameter bored piles under complex geological conditions, including:

[0005] A hole cleaning support is provided on the inner wall of the borehole. It includes an upper support, a hole cleaning and casting rotary transmission component, and a lower partition support. The upper support and the lower partition support provide support for the circumferential rotation of the hole cleaning and casting rotary transmission component connected to it within the borehole. The lower partition support separates the bottom of the borehole from the upper part.

[0006] A wall-protecting and hole-cleaning component is mounted on the hole-cleaning and casting rotary transmission component. It includes a rotating wall-protecting component, a wall-protecting power component, and an upper hole-cleaning component. The rotating wall-protecting component rotates circumferentially on the hole-cleaning and casting rotary transmission component and is driven by the connected wall-protecting power component to move axially along the hole-cleaning and casting rotary transmission component. The upper hole-cleaning component cleans the mud and sludge on the lower partition support component on the hole-cleaning and casting rotary transmission component.

[0007] The bottom cleaning component, located on the hole cleaning and casting rotary transmission component, performs cleaning operations on the bottom of the drill hole below the lower partition support component.

[0008] Preferably, the upper support member includes an upper rotating support tube and support legs, the support legs being disposed on the upper rotating support tube; the support legs include a first support tube, a second support tube, and a first automatic telescopic rod, one end of the first support tube being disposed on the upper rotating support tube, one end of the second support tube being embedded in the other end of the first support tube, the bottom end of the first automatic telescopic rod being fixedly embedded in the first support tube, the top end of the first automatic telescopic rod being connected to the second support tube, and a friction pad being disposed at the other end of the second support tube; a plurality of support legs are evenly distributed circumferentially around the upper rotating support tube; the upper rotating support tube is installed at the borehole opening via the plurality of support legs.

[0009] Preferably, the hole-cleaning casting rotary transmission component includes a rotary transmission component and a rotary power component, both of which are mounted on the upper support component. The rotary transmission component includes a first rotary transmission tube, a second rotary transmission tube, a third rotary transmission tube, a fourth rotary transmission tube, a fifth rotary transmission tube, a sixth rotary transmission tube, a seventh rotary transmission tube, and an eighth rotary transmission tube. One end of the first rotary transmission tube is rotatably fitted into the upper rotary support tube. One end of the second rotary transmission tube is fitted onto the other end of the first rotary transmission tube, and a first slider on the second rotary transmission tube engages with a first groove on the first rotary transmission tube. The first groove is L-shaped. One end of the third rotary transmission tube is slidably fitted onto the other end of the second rotary transmission tube. One end of the fourth rotary transmission tube is slidably fitted onto the other end of the third rotary transmission tube; one end of the fifth rotary transmission tube is slidably fitted onto the other end of the fourth rotary transmission tube; one end of the sixth rotary transmission tube is slidably fitted onto the other end of the fifth rotary transmission tube; one end of the seventh rotary transmission tube is slidably fitted onto the other end of the sixth rotary transmission tube; one end of the eighth rotary transmission tube is slidably fitted onto the other end of the seventh rotary transmission tube; and a first one-way sealing plate is hinged to the other end of the eighth rotary transmission tube. The rotary power component includes a motor, a first gear, and a second gear. The motor is mounted on the support leg, the first gear is mounted on the motor shaft, and the second gear is fixedly fitted onto the first rotary transmission tube, and the second gear meshes with the first gear.

[0010] Preferably, the lower partition support includes a support plate, a support barrel, a sealing airbag, a first air supply hose, an upper sealing ring, and a lower sealing ring. A lower rotating support tube is embedded at the center of the support plate, and the support plate is rotatably mounted on the outside of the eighth rotating transmission tube via the lower rotating support tube. One end of the support barrel is horizontally embedded in a support hole on the side wall of the support plate. The sealing airbag is annular in shape, with its inner ring surface fitted onto the side wall of the support plate, and the other end of the support barrel penetrates the inner ring surface of the sealing airbag. The inner side wall of the outer ring surface of the sealing airbag is connected to the other end of the support barrel. One end of the first air supply hose extends outward through one side wall of the first rotating transmission tube, and the other end of the first air supply hose extends outward through the side wall of the eighth rotating transmission tube. The upper sealing ring is rotatably sealed and fitted onto the outer wall of one end of the first rotary transmission tube, and the first air supply groove on the inner wall of the upper sealing ring is connected to one end of the first air supply hose; a second air supply hose is connected through the upper sealing ring, one end of the second air supply hose is connected to the first air supply groove, and the other end of the second air supply hose is connected to the air pressure pump; the lower sealing ring has the same structure as the upper sealing ring, and the lower sealing ring is rotatably sealed and fitted onto the outer wall of the eighth rotary transmission tube, and the first air supply groove of the lower sealing ring is connected to the other end of the first air supply hose; a third air supply hose is connected through the lower sealing ring, one end of the third air supply hose is connected to the first air supply groove of the lower sealing ring, and the other end of the third air supply hose is connected to the bottom of the support hole.

[0011] Preferably, the rotating protective wall component includes a rotating protective wall seat and a protective wall smoothing component. The rotating protective wall seat is disposed on the rotating transmission component, and the protective wall smoothing component is disposed on the rotating protective wall seat. The rotating protective wall seat includes a rotating protective wall tube and a sliding transmission component. The sliding transmission component is disposed on the rotating protective wall tube and includes a transmission fixing tube, a spring, and a sliding transmission plate. One end of the transmission fixing tube passes through the rotating protective wall tube, and the spring is embedded in the other end of the transmission fixing tube. One end of the sliding transmission plate is slidably embedded in one end of the transmission fixing tube, and the other end of the sliding transmission plate is embedded in a second groove on the first rotating transmission tube. The other end of the sliding transmission plate can slide from the second groove into a third groove on the second rotating transmission tube, and then slide into a fourth groove on the third rotating transmission tube, and then into a fourth groove on the fourth rotating transmission tube. The fifth sliding groove, the sixth sliding groove on the fifth rotary transmission tube, the seventh sliding groove on the sixth rotary transmission tube, the eighth sliding groove on the seventh rotary transmission tube, and the ninth sliding groove on the eighth rotary transmission tube are all located within the sliding transmission plate. The other end of the sliding transmission plate is rounded. The rotating protective wall tube is fitted onto the rotary transmission component via multiple sliding transmission components. The protective wall smoothing component includes a third support tube, a fourth support tube, a second automatic telescopic rod, and a smoothing plate. The third support tube is disposed on the rotating protective wall tube. One end of the fourth support tube is embedded in the other end of the third support tube. The bottom end of the second automatic telescopic rod is embedded in the third support tube, and the top end of the second automatic telescopic rod is connected to the fourth support tube. The smoothing plate is arc-shaped and is disposed at the other end of the fourth support tube. Multiple sets of the protective wall smoothing components are evenly distributed around the rotating protective wall tube.

[0012] Preferably, the protective wall power component includes a circumferential transmission component, a radial adjustment component, a steering control component, and a tension transmission component. The circumferential transmission component is disposed on the upper support component, the radial adjustment component is disposed on the circumferential transmission component, the steering control component is disposed on the radial adjustment component, and the tension transmission component is disposed on the radial adjustment component. The circumferential transmission component includes a circumferential transmission seat, a circumferential sliding seat, a circumferential locking tube, a first magnetic coil, and a circumferential locking shaft. The circumferential transmission seat is disposed on the lower side of the support leg, the circumferential sliding seat is embedded in the circumferential transmission seat, one end of the circumferential locking tube is disposed through the circumferential transmission seat, the first magnetic coil is embedded in the circumferential locking tube, and the circumferential locking shaft is slidably embedded in the circumferential locking tube, and the circumferential locking shaft corresponds to the locking hole on the circumferential sliding seat.

[0013] Preferably, the radial adjustment component includes a radial slide, a radial slider, a third automatic telescopic rod, and a winding tube. The radial slide is C-shaped and radially disposed on the circumferential slide. The radial slider is slidably embedded in the radial slide. The bottom end of the third automatic telescopic rod is embedded in one end of the radial slide, and the top end of the third automatic telescopic rod is connected to the radial slider. One end of the winding tube is disposed on the radial slider. Multiple sets of the radial adjustment components are evenly distributed circumferentially along the circumferential slide. The steering control component includes a second magnetic coil and a steering mechanism. The control lever has the second magnetic coil embedded in the winding tube. The steering control lever is L-shaped, and one end of the steering control lever is slidably embedded in the winding tube. The tension transmission component includes a wire rope, a first steering wheel, and a second steering wheel. One end of the wire rope is connected to one of the winding tubes. The first steering wheel is mounted on the eighth rotary transmission tube via a first fixing frame. The second steering wheel is mounted on the first rotary transmission tube via a second fixing frame. The other end of the wire rope is connected to the rotating guard wall seat after being turned by the first steering wheel and the second steering wheel.

[0014] Preferably, the upper cleaning component includes a first slag suction pipe, a second one-way sealing plate, a second slag suction pipe, a first take-up and release fixing pipe, a third magnetic coil, and a first take-up and release drive shaft. One end of the first slag suction pipe passes through one end of the eighth rotary drive pipe. One side of the second one-way sealing plate is hinged to one end of the first slag suction pipe. One end of the second slag suction pipe is slidably embedded in the other end of the first slag suction pipe. The first take-up and release fixing pipe is disposed on the first slag suction pipe. The third magnetic coil is embedded in the first take-up and release fixing pipe. One end of the first take-up and release drive shaft is slidably embedded in the first take-up and release fixing pipe. The other end of the first take-up and release drive shaft is connected to the second slag suction pipe.

[0015] Preferably, the bottom cleaning component includes a third slag suction pipe, a third one-way sealing plate, a fourth slag suction pipe, a second take-up and release fixing pipe, a fourth magnetic coil, a second take-up and release drive shaft, and a slurry relay pipe. One end of the third slag suction pipe penetrates into the other end of the eighth rotary drive pipe. One side of the third one-way sealing plate is hinged to one end of the third slag suction pipe. One end of the fourth slag suction pipe is slidably embedded in the other end of the third slag suction pipe. The second take-up and release fixing pipe is disposed on the third slag suction pipe. The fourth magnetic coil is embedded in the second take-up and release fixing pipe. One end of the second take-up and release drive shaft is slidably embedded in the second take-up and release fixing pipe. The other end of the second take-up and release drive shaft is connected to the fourth slag suction pipe. One end of the slurry relay pipe vertically penetrates the support plate, and its penetration point is close to the lower rotary support pipe.

[0016] Preferably, the construction process of the large-diameter bored pile cleaning device under complex geological conditions includes:

[0017] S1: Hoist the large-diameter bored pile cleaning device under the complex geological conditions into the borehole;

[0018] S2: Unfold the support leg and the lower partition support, and adjust the rotary transmission component to the axis of the drill hole;

[0019] S3: Start the motor to rotate in the forward direction, and clean the drill hole in layers through the upper cleaning member and the bottom cleaning member via the rotary transmission member, and block the bottom of the drill hole through the lower partition support member;

[0020] S4: The rotating transmission component, which is rotated in the forward direction by the motor, drives the rotating wall protection component to rotate circumferentially. At the same time, the rotating wall protection component is driven to move downward by the wall protection power component to perform a pressing and smoothing operation on the inner wall of the borehole.

[0021] S5: After the mud and debris on the bottom of the borehole and the lower partition support are cleaned, the support leg, the rotating wall protection member and the lower partition support are retracted radially in sequence to facilitate the lowering of the steel cage to the predetermined position;

[0022] S6: Concrete is poured into the bottom of the borehole through the rotary transmission component, and the rotary transmission component is rotated during the pouring process to agitate the concrete through the bottom cleaning component;

[0023] S7: After pouring to the predetermined depth, start the motor to rotate in the reverse direction, thereby pulling the eighth rotary transmission tube to retract and rise axially.

[0024] S8: After completing the drilling and pouring of the hole as described in S7, the hole cleaning device for the large-diameter bored pile under complex geological conditions can be lifted out of the hole.

[0025] The present invention has at least the following beneficial effects:

[0026] 1) The hole cleaning device and construction process for large-diameter bored piles under complex geological conditions of the present invention can significantly improve the hole cleaning quality and efficiency, significantly improve the casting efficiency and pile quality of the bored piles, and significantly reduce the fall-off and collapse of the borehole wall residue.

[0027] 2) The hole cleaning device and construction process for large-diameter bored piles under complex geological conditions of the present invention are provided with a lower partition support, an upper hole cleaning component and a bottom hole cleaning component. The lower partition support can separate the bottom and upper part of the borehole. After the bottom hole cleaning component continuously cleans the bottom of the borehole, the lower partition support can prevent the mud and slag in the upper part of the borehole from settling to the bottom of the borehole, so as to ensure the hole cleaning quality, hole cleaning efficiency and concrete pouring quality at the bottom of the borehole.

[0028] 3) The hole cleaning device and construction process for large-diameter bored piles under complex geological conditions of the present invention are equipped with a hole cleaning and wall protection component. The hole cleaning and wall protection component, in cooperation with the rotary transmission component, can apply radial pressing and smoothing force to the borehole wall to improve the stability of the borehole wall, thereby significantly reducing the detachment and collapse rate of the borehole wall residue, significantly improving the hole cleaning quality and efficiency, and significantly improving the quality of the bored pile.

[0029] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the hole cleaning device for large-diameter bored piles under complex geological conditions, installed inside the borehole according to the present invention.

[0031] Figure 2 This is a top view of the large-diameter bored pile cleaning device under complex geological conditions of the present invention installed inside the borehole;

[0032] Figure 3 This is a front view of the hole cleaning device for large-diameter bored piles under complex geological conditions according to the present invention.

[0033] Figure 4 This invention relates to a hole cleaning device for large-diameter bored piles under complex geological conditions. Figure 3 A magnified view of part A in the image;

[0034] Figure 5 This invention relates to a hole cleaning device for large-diameter bored piles under complex geological conditions. Figure 4 A magnified view of part B in the image;

[0035] Figure 6 This is a three-dimensional structural diagram of the hole cleaning device for large-diameter bored piles under complex geological conditions according to the present invention;

[0036] Figure 7 This invention relates to a hole cleaning device for large-diameter bored piles under complex geological conditions. Figure 6 A magnified view of part C;

[0037] Figure 8 This invention relates to a hole cleaning device for large-diameter bored piles under complex geological conditions. Figure 6 A magnified view of part D;

[0038] Figure 9 This invention relates to a hole cleaning device for large-diameter bored piles under complex geological conditions. Figure 6 A magnified view of part E in the image;

[0039] Figure 10 This is a bottom-view three-dimensional structural diagram of the hole cleaning device for large-diameter bored piles under complex geological conditions according to the present invention;

[0040] Figure 11 This invention relates to a hole cleaning device for large-diameter bored piles under complex geological conditions. Figure 10 A magnified view of part of F;

[0041] Figure 12 This invention relates to a hole cleaning device for large-diameter bored piles under complex geological conditions. Figure 10 A magnified view of a portion of G;

[0042] Figure 13 This invention relates to a hole cleaning device for large-diameter bored piles under complex geological conditions. Figure 10 A magnified view of a portion of H.

[0043] Wherein: 1-Drilling hole, 3-First support tube, 4-Second support tube, 5-Friction pad, 6-First rotary transmission tube, 7-Second rotary transmission tube, 8-Third rotary transmission tube, 9-Fourth rotary transmission tube, 10-Fifth rotary transmission tube, 11-Sixth rotary transmission tube, 12-Seventh rotary transmission tube, 13-Eighth rotary transmission tube, 14-Motor, 15-Support plate, 16-Sealing airbag, 17-Rotating protective wall tube, 18-Transmission fixing tube, 19-Sliding transmission plate, 20-Third support tube, 21-Fourth support tube 22-Smoothing plate, 23-Circumferential transmission seat, 24-Circumferential sliding seat, 25-Circumferential locking element, 26-Radial sliding seat, 27-Radial slider, 28-Winding tube, 29-Steering control lever, 30-Wire rope, 31-First steering wheel, 32-Second fixed frame, 33-First slag suction pipe, 34-Second slag suction pipe, 35-First take-up and release fixed pipe, 36-First take-up and release transmission shaft, 37-Third slag suction pipe, 38-Fourth slag suction pipe, 39-Second take-up and release fixed pipe, 40-Second take-up and release transmission shaft, 41-First one-way sealing plate. Detailed Implementation

[0044] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and by way of embodiments. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0045] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0046] according to Figures 1-13 As shown, a hole cleaning device and construction process for large-diameter bored piles under complex geological conditions are disclosed. The device includes a hole cleaning support, a wall-protecting hole cleaning component, and a bottom hole cleaning component. The hole cleaning support is installed on the inner wall of the borehole 1, and both the wall-protecting and bottom hole cleaning components are installed on the hole cleaning support. The hole cleaning support includes an upper support, a hole cleaning and casting rotation transmission component, and a lower partition support. Both the upper and lower partition supports are installed within the borehole 1, and the hole cleaning and casting rotation transmission component is installed on both the upper and lower partition supports. The upper support includes an upper rotating support tube and support legs, with the support legs installed on the upper rotating support tube. The support legs include a first support tube 3, a second support tube 4, and a first automatic telescopic rod. One end of the first support tube 3 is horizontally fixed on the upper rotating support tube, and one end of the second support tube 4 is horizontally embedded in the other end of the first support tube 3, allowing the second support tube 4 to slide horizontally axially within the first support tube 3. The bottom end of the first automatic telescopic rod is fixedly embedded in the first support tube 3, and the top end of the first automatic telescopic rod is fixedly embedded in the second support tube 4. This allows the first automatic telescopic rod to control the extension and retraction of the second support tube 4 within the first support tube 3. The cooperation between the second support tube 4 and the first support tube 3 increases the lateral load-bearing capacity of the first automatic telescopic rod. Furthermore, a friction pad 5 is provided at the other end of the second support tube 4, which increases the stability between the second support tube 4 and the inner wall of the borehole 1. Four support legs are provided, and the four support legs are evenly distributed circumferentially around the upper rotating support tube. The upper rotating support tube is horizontally installed at the opening of the borehole 1 via the four support legs, so that the axis of the upper rotating support tube coincides with the axis of the borehole 1. When it is necessary to extend the reinforcing cage downwards into the borehole 1, the second support tube 4 is simply retracted in a straight line.

[0047] The rotary transmission component for hole clearing and casting includes a rotary transmission component and a rotary power component, both of which are mounted on the upper support component. The rotary transmission component includes a first rotary transmission tube 6, a second rotary transmission tube 7, a third rotary transmission tube 8, a fourth rotary transmission tube 9, a fifth rotary transmission tube 10, a sixth rotary transmission tube 11, a seventh rotary transmission tube 12, and an eighth rotary transmission tube 13. One end of the first rotary transmission tube 6 is rotatably fitted into the upper rotary support tube, allowing it to rotate circumferentially and lock axially within the upper rotary support tube. One end of the second rotary transmission tube 7 is slidably fitted onto the other end of the first rotary transmission tube 6, and a first slider on the inner wall of the second rotary transmission tube 7 engages with a first groove on the outer wall of the first rotary transmission tube 6. The first slider is rectangular, and the first groove is L-shaped with a rectangular cross-section. One end of the first groove extends axially along the first rotary transmission tube 6. The second rotary transmission tube 7 can slide axially along the first rotary transmission tube 6 by sliding the first slider within one end of the first groove, thereby retracting the second rotary transmission tube 7 onto the first rotary transmission tube 6. When the second rotary transmission tube 7 and the first rotary transmission tube 6 are fully extended, the forward-rotating first rotary transmission tube 6 can slide the other end of the first groove onto the first slider, thus achieving axial locking between the first rotary transmission tube 6 and the second rotary transmission tube 7. Reversing the rotation of the first rotary transmission tube 6 releases the axial lock from the second rotary transmission tube 7. One end of the third rotary transmission tube 8 is slidably fitted onto the other end of the second rotary transmission tube 7, and the connection method between the third rotary transmission tube 8 and the second rotary transmission tube 7 is the same as the connection method between the second rotary transmission tube 7 and the first rotary transmission tube 6. One end of the fourth rotary transmission tube 9 is slidably fitted onto the other end of the third rotary transmission tube 8, and the connection method between the fourth rotary transmission tube 9 and the third rotary transmission tube 8 is the same as the connection method between the second rotary transmission tube 7 and the first rotary transmission tube 6. One end of the fifth rotary transmission tube 10 is slidably fitted onto the other end of the fourth rotary transmission tube 9, and the connection method between the fifth rotary transmission tube 10 and the fourth rotary transmission tube 9 is the same as the connection method between the second rotary transmission tube 7 and the first rotary transmission tube 6. One end of the sixth rotary transmission tube 11 is slidably fitted onto the other end of the fifth rotary transmission tube 10, and the connection method between the sixth rotary transmission tube 11 and the fifth rotary transmission tube 10 is the same as the connection method between the second rotary transmission tube 7 and the first rotary transmission tube 6.One end of the seventh rotary transmission pipe 12 is slidably fitted onto the other end of the sixth rotary transmission pipe 11, and the connection method between the seventh rotary transmission pipe 12 and the sixth rotary transmission pipe 11 is the same as the connection method between the second rotary transmission pipe 7 and the first rotary transmission pipe 6. One end of the eighth rotary transmission pipe 13 is slidably fitted onto the other end of the seventh rotary transmission pipe 12, and the connection method between the eighth rotary transmission pipe 13 and the seventh rotary transmission pipe 12 is the same as the connection method between the second rotary transmission pipe 7 and the first rotary transmission pipe 6. A first one-way sealing plate 41 is hinged to the other end of the eighth rotary transmission pipe 13. When the eighth rotary transmission pipe 13 draws mud from the borehole 1, the other end of the eighth rotary transmission pipe 13 will be blocked by the first one-way sealing plate 41; when the eighth rotary transmission pipe 13 delivers concrete into the borehole 1, the first one-way sealing plate 41 will be opened.

[0048] Furthermore, the first rotary transmission pipe 6, the second rotary transmission pipe 7, the third rotary transmission pipe 8, the fourth rotary transmission pipe 9, the fifth rotary transmission pipe 10, the sixth rotary transmission pipe 11, the seventh rotary transmission pipe 12, and the eighth rotary transmission pipe 13 are all of the same length. The specific lengths of these pipes are determined based on the height of each extension of the pouring pipe during concrete pouring for the cast-in-place pile. This ensures that the length of each retraction of the first rotary transmission pipe 6, the second rotary transmission pipe 7, the third rotary transmission pipe 8, the fourth rotary transmission pipe 9, the fifth rotary transmission pipe 10, the sixth rotary transmission pipe 11, the seventh rotary transmission pipe 12, and the eighth rotary transmission pipe 13 meets the height requirements of the pouring pipe during concrete pouring for the cast-in-place pile.

[0049] Furthermore, a rotating relay bucket is rotatably fitted onto one end of the first rotary transmission pipe 6. The opening of the rotating relay bucket is rotatably fitted onto one end of the first rotary transmission pipe 6. The bottom of the rotating relay bucket is connected to a slurry pumping hose, and the other end of the slurry pumping hose is connected to a slurry pump. The slurry pump draws mud slurry from the borehole 1 through the slurry pumping hose, the rotating relay bucket, and the rotary transmission component. After the borehole cleaning is completed, when it is necessary to deliver concrete into the borehole 1 through the rotary transmission component, the rotating relay bucket is pulled out, and then concrete is poured into the borehole 1 through the first rotary transmission pipe 6.

[0050] The rotating power component includes a motor 14, a first gear, and a second gear. The motor 14 is fixedly mounted on a mounting plate on the support leg. The first gear is fixedly mounted on the rotating shaft of the motor 14. The second gear is fixedly mounted on the first rotating transmission tube 6, and the second gear meshes with the first gear.

[0051] The lower partition support includes a support plate 15, a support barrel, a sealing airbag 16, a first air supply hose, an upper sealing ring, and a lower sealing ring. The support plate 15 is circular, and a lower rotating support tube is fixedly embedded at the center of the support plate 15. The support plate 15 is rotatably mounted on the outer side of the eighth rotating transmission tube 13 via the lower rotating support tube, allowing the eighth rotating transmission tube 13 to rotate circumferentially within the lower rotating support tube. One end of the support barrel is horizontally embedded in a support hole on the side wall of the support plate 15, allowing the support barrel to slide axially back and forth within the support hole. The axis of the support hole is parallel to the radial line of the support plate 15. Four support barrels are provided, and the four support barrels are evenly distributed circumferentially around the support plate 15. The sealing airbag 16 is annular in shape. The inner ring of the sealing airbag 16 is fixedly fitted onto the side wall of the support plate 15. After the other end of the support barrel penetrates the inner ring of the sealing airbag 16, the inner side wall of the outer ring of the sealing airbag 16 is fixedly connected to the other end of the support barrel. The support barrel improves the connection stability between the sealing airbag 16 and the support plate 15, as well as the contact stability and contact strength between the sealing airbag 16 and the inner wall of the borehole 1. The first air supply hose is inside the rotary transmission tube. One end of the first air supply hose extends outward through one side wall of the first rotary transmission tube 6, and the other end extends outward through the side wall of the eighth rotary transmission tube 13. The upper sealing ring is rotatably fitted onto the outer wall of one end of the first rotary transmission tube 6, and the first air supply groove on the inner wall of the upper sealing ring communicates with one end of the first air supply hose. Furthermore, the first air supply groove is annular in shape, its axis coincides with the axis of the upper sealing ring, and its cross-section is rectangular. Rotary sealing rings are provided on both sides of the first air supply groove, which improve the sealing performance of the first air supply groove. A second air supply hose is connected through the upper sealing ring, with one end of the second air supply hose communicating with the first air supply groove and the other end of the second air supply hose communicating with the air pressure pump. The lower sealing ring has the same structure as the upper sealing ring, but the radial dimension of the lower sealing ring is larger than that of the upper sealing ring. The lower sealing ring is rotatably fitted onto the outer wall of the eighth rotary transmission pipe 13, and the first air supply groove of the lower sealing ring communicates with the other end of the first air supply hose. A third air supply hose is connected through the lower sealing ring, with one end of the third air supply hose communicating with the first air supply groove of the lower sealing ring and the other end of the third air supply hose communicating with the air supply relay cavity in the support plate 15. The air supply relay cavity communicates with the bottom of the plurality of support holes.When the pneumatic pump supplies high-pressure gas to the first gas delivery hose, the gas enters the support barrel through the first gas delivery groove of the lower sealing ring and the gas delivery relay chamber, and then enters the sealing airbag 16 through the gas delivery through hole on the other side wall of the support barrel. This inflates the sealing airbag 16, which then tightly presses against the inner wall of the borehole 1. This provides auxiliary support for the rotary transmission component and separates the bottom and upper parts of the borehole 1, allowing the bottom cleaning component and the wall cleaning component to cooperate with the cleaning operations on the bottom and upper parts of the borehole 1, respectively. When the lower reinforcing cage is needed, air is drawn into the sealing airbag 16.

[0052] The wall-protecting and hole-cleaning component includes a rotating wall-protecting component, a wall-protecting power component, and an upper hole-cleaning component. Both the rotating wall-protecting component and the upper hole-cleaning component are mounted on the rotating transmission component, and the wall-protecting power component is mounted on the upper support component. The rotating wall-protecting component includes a rotating wall-protecting seat and a wall-protecting smoothing component. The rotating wall-protecting seat is mounted on the rotating transmission component, and the wall-protecting smoothing component is mounted on the rotating wall-protecting seat. The rotating protective wall seat includes a rotating protective wall tube 17 and a sliding transmission component. The sliding transmission component is disposed on the rotating protective wall tube 17, and the inner wall of the rotating protective wall tube 17 is larger than the outer wall of the eighth rotating transmission tube 13. The sliding transmission component includes a transmission fixing tube 18, a spring, and a sliding transmission plate 19. One end of the transmission fixing tube 18 horizontally penetrates the rotating protective wall tube 17, and the spring is embedded in the other end of the transmission fixing tube 18. One end of the sliding transmission plate 19 is slidably embedded in the other end of the transmission fixing tube 18, and the other end of the sliding transmission plate 19 is embedded in a second sliding groove on the outer wall of the first rotating transmission tube 6. The other end of the movable plate 19 can slide axially from the second sliding groove into the third sliding groove on the outer wall of the second rotary transmission tube 7, and then slide into the fourth sliding groove on the third rotary transmission tube 8, the fifth sliding groove on the fourth rotary transmission tube 9, the sixth sliding groove on the fifth rotary transmission tube 10, the seventh sliding groove on the sixth rotary transmission tube 11, the eighth sliding groove on the seventh rotary transmission tube 12, and the ninth sliding groove on the eighth rotary transmission tube 13, thereby enabling the sliding transmission plate 19 to reciprocate axially within the second, third, fourth, fifth, sixth, seventh, eighth, and ninth sliding grooves. Multiple sliding transmission components are provided, and these components are evenly arranged circumferentially on the rotating protective wall tube 17. The rotating protective wall tube 17 is fitted onto the rotary transmission components by the multiple sliding transmission components, and the axis of the rotating protective wall tube 17 coincides with the axis of the first rotary transmission tube 6. The rotary transmission component drives the sliding transmission plate 19 and the rotating protective tube 17 to rotate circumferentially via the second, third, fourth, fifth, sixth, seventh, eighth, and ninth slide grooves. Furthermore, the other end of the sliding transmission plate 19 has a rounded corner, the radius of which is greater than the wall thickness of the second rotary transmission tube 7, to facilitate its smooth sliding from the second slide groove into the third slide groove.

[0053] The wall-smoothing component includes a third support tube 20, a fourth support tube 21, a second automatic telescopic rod, and a smoothing plate 22. The third support tube 20 is horizontally fixed on the rotating wall-smoothing tube 17. One end of the fourth support tube 21 is slidably embedded in the other end of the third support tube 20. The bottom end of the second automatic telescopic rod is fixedly embedded in the third support tube 20, and the top end of the second automatic telescopic rod is fixedly embedded in the fourth support tube 21. The second automatic telescopic rod can drive the fourth support tube 21 to slide axially back and forth within the third support tube 20. The smoothing plate 22 is arc-shaped, and its inner sidewall is fixedly mounted on the other end of the fourth support tube 21, moving with the fourth support tube 21 and conforming to the inner wall of the borehole 1. Four sets of the wall-smoothing component are provided, and the four sets of the wall-smoothing component are evenly distributed around the rotating wall-smoothing tube 17. As the rotating wall-protecting tube 17 rotates circumferentially, the wall-smoothing component can move circumferentially and press and smooth the inner wall of the borehole 1 through the smoothing plate 22, thereby smoothing the inner wall of the borehole 1 and increasing the thickness of the mud layer on the inner wall of the borehole 1, preventing the debris from falling off and collapsing. When the lower reinforcing cage is needed, the fourth support tube 21 can simply be retracted into the third support tube 20.

[0054] The protective wall power component includes a circumferential winding component and a tension transmission component. The circumferential winding component is mounted on the upper support component, and the tension transmission component is mounted on the circumferential winding component. The circumferential winding component includes a circumferential transmission component, a radial adjustment component, and a steering control component. The circumferential transmission component is mounted on the upper support component, the radial adjustment component is mounted on the circumferential transmission component, and the steering control component is mounted on the radial adjustment component. The circumferential transmission component includes a circumferential transmission seat 23, a circumferential sliding seat 24, and a circumferential locking component 25. The circumferential transmission seat 23 is generally annular and has a C-shaped cross-section. The circumferential transmission seat 23 is fixedly mounted on the lower side of the support leg. The circumferential sliding seat 24 is generally annular and has a T-shaped cross-section. The circumferential sliding seat 24 is embedded in the circumferential transmission seat 23, allowing it to rotate circumferentially within the circumferential transmission seat 23. The circumferential locking component 25 includes a circumferential locking tube, a first magnetic coil, and a circumferential locking shaft. One end of the circumferential locking tube is vertically inserted into the circumferential transmission seat 23. The first magnetic coil is fixedly embedded in the circumferential locking tube, and the circumferential locking shaft is slidably embedded in the circumferential locking tube, and is also embedded in the first magnetic coil. When a positive direct current is applied to the first magnetic coil to generate a magnetic field, it will push the circumferential locking shaft to move axially downward within the circumferential locking tube, thereby inserting it into the locking holes on the circumferential sliding seat 24. A plurality of locking holes are evenly distributed circumferentially around the circumferential sliding seat 24. The circumferential locking component 25 can circumferentially lock the circumferential transmission seat 23 and the circumferential sliding seat 24 as needed.

[0055] The radial adjustment component includes a radial slide 26, a radial slider 27, a third automatic telescopic rod, and a winding tube 28. The radial slide 26 is C-shaped and fixedly mounted on the circumferential slide 24, with its axis parallel to the radial line of the circumferential slide 24. The radial slider 27 is slidably fitted within the radial slide 26. The bottom end of the third automatic telescopic rod is fixedly fitted within one end tube of the radial slide 26, and its top end is connected to the radial slider 27. The third automatic telescopic rod extends and retracts to drive the radial slider 27 to reciprocate radially along the circumferential slide 24 within the radial slide 26. One end of the winding tube 28 passes through the slot of the radial slide 26 and is fixedly mounted on the radial slider 27. Four sets of the radial adjustment component are provided, evenly distributed along the circumference of the circumferential slide 24.

[0056] The steering control component includes a second magnetic coil and a steering control lever 29. The second magnetic coil is fixedly embedded in the winding tube 28. The steering control lever 29 is L-shaped, with one end slidably embedded in the winding tube 28 and also embedded in the second magnetic coil. When a positive direct current is applied to the second magnetic coil to generate a magnetic field, it will push one end of the steering control lever 29 to move axially back and forth within the winding tube 28. This, in turn, locks the wire rope 30 onto the winding tube 28 via the other end of the steering control lever 29. When the circumferential sliding seat 24 rotates in the opposite direction relative to the first rotary transmission tube 6, the steering control lever 29 prevents the wire rope 30 from falling off the winding tube 28, thus satisfying the reverse winding of the wire rope 30 by multiple winding tubes 28.

[0057] The tension transmission component includes a wire rope 30, a first steering wheel 31, and a second steering wheel. One end of the wire rope 30 is fixedly connected to a winding tube 28. The first steering wheel 31 is mounted on the eighth rotary transmission tube 13 via a first fixing frame, and the second steering wheel is mounted on the first rotary transmission tube 6 via a second fixing frame 32. The other end of the wire rope 30 is fixedly connected to the rotating guard seat after being turned by the first steering wheel 31 and the second steering wheel. When the motor 14 drives the rotary transmission component to rotate forward, the first rotary transmission tube 6, the second rotary transmission tube 7, the third rotary transmission tube 8, the fourth rotary transmission tube 9, the fifth rotary transmission tube 10, the sixth rotary transmission tube 11, the seventh rotary transmission tube 12, and the eighth rotary transmission tube 13 are axially locked together. At this time, after the circumferential transmission seat 23 and the circumferential sliding seat 24 are circumferentially locked, the multiple winding tubes 28 will wind and take in one end of the wire rope 30, thereby pulling the rotating guard seat downward along the rotary transmission component. Simultaneously, the rotary transmission component, which moves downward and rotates circumferentially, performs a wall-protecting operation on the inner wall of the borehole 1. By controlling the sliding position of the radial slider 27 within the radial slide block 26, the radius of the winding tube 28 from the axis of the rotary transmission component is controlled, thereby controlling the winding speed of the wire rope 30 and thus controlling the vertical movement speed of the rotating wall-protecting seat. When the rotating protective wall component is pulled down to the eighth rotating transmission tube 13, it cannot continue to move downward due to the obstruction of the upper cleaning component. At this time, the steering control rod 29 locks the wound wire rope 30 onto the winding tube 28 and starts the motor 14 in the opposite direction. The reverse-rotating motor 14 will drive the first rotating transmission tube 6 to rotate in the opposite direction. At this time, the axial lock between the eighth rotating transmission tube 13 and the seventh rotating transmission tube 12 is released. At the same time, multiple winding tubes 28 will reverse-wind the wire rope 30 to pull the eighth rotating transmission tube 13 toward the seventh rotating transmission tube 12, so as to realize the axial shortening of the rotating transmission component and meet the requirements for the rise of the pouring pipe when pouring concrete.

[0058] The upper cleaning component includes a first suction pipe 33, a second one-way sealing plate, a second suction pipe 34, a first take-up and release fixing pipe 35, a third magnetic coil, and a first take-up and release transmission shaft 36. One end of the first suction pipe 33 horizontally penetrates into one end of the eighth rotary transmission pipe 13. One side of the second one-way sealing plate is hinged to one end of the first suction pipe 33. When the eighth rotary transmission pipe 13 sucks in mud from the borehole 1 through the first suction pipe 33, the second one-way sealing plate will open. When the eighth rotary transmission pipe 13 delivers concrete into the borehole 1, the second one-way sealing plate closes and seals one end of the first suction pipe 33 under gravity to prevent concrete from entering the first suction pipe 33. One end of the second suction pipe 34 is slidably embedded in the other end of the first suction pipe 33. The first take-up and release fixing tube 35 is fixedly mounted on the first slag suction tube 33, and the third magnetic coil is fixedly embedded in the first take-up and release fixing tube 35. One end of the first take-up and release drive shaft 36 is slidably embedded in the first take-up and release fixing tube 35. The other end of the first take-up and release drive shaft 36 is connected to the second slag suction tube 34. When the third magnetic coil is supplied with direct current to generate a magnetic field, it will pull the first take-up and release drive shaft 36, thereby driving the second slag suction tube 34 to slide back and forth in the first slag suction tube 33. When the drilling mud is pumped from the borehole 1 through the rotary transmission component, the mud that falls onto the upper surface of the lower partition support will be cleaned through the first slag suction tube 33 and the second one-way sealing plate. Furthermore, both the first slag suction tube 33 and the second slag suction tube 34 are flat tubes to facilitate the movement of mud towards the borehole 1 wall when rotating with the rotary transmission component, thereby improving the cleaning efficiency. The second slag suction pipe 34 is provided with a second slag suction through hole on its side wall, which further improves the slag suction efficiency of the lower partition support.

[0059] The bottom cleaning assembly includes a third suction pipe 37, a third one-way sealing plate, a fourth suction pipe 38, a second take-up and release fixing pipe 39, a fourth magnetic coil, a second take-up and release drive shaft 40, and a slurry relay pipe. One end of the third suction pipe 37 horizontally penetrates into the other end of the eighth rotary drive pipe 13. One side of the third one-way sealing plate is hinged to one end of the third suction pipe 37. When the eighth rotary drive pipe 13 sucks in mud from the borehole 1 through the third suction pipe 37, the third one-way sealing plate will open. When the eighth rotary drive pipe 13 delivers concrete into the borehole 1, the third one-way sealing plate will close and seal one end of the third suction pipe 37 to prevent concrete from entering the third suction pipe 37. One end of the fourth suction pipe 38 is slidably embedded in the other end of the third suction pipe 37. The second receiving and releasing fixing tube 39 is fixedly installed on the third slag suction tube 37, and the fourth magnetic coil is fixedly embedded in the second receiving and releasing fixing tube 39. One end of the second receiving and releasing drive shaft 40 is slidably embedded in the second receiving and releasing fixing tube 39. The other end of the second receiving and releasing drive shaft 40 is connected to the fourth slag suction tube 38. When the fourth magnetic coil is supplied with direct current to generate a magnetic field, it will pull the second receiving and releasing drive shaft 40, thereby driving the fourth slag suction tube 38 to slide back and forth in the third slag suction tube 37. When the mud is pumped from the borehole 1 through the rotary transmission component, the mud at the bottom of the borehole 1 will be cleaned through the third slag suction tube 37 and the fourth slag suction tube 38. Furthermore, both the third slag suction tube 37 and the fourth slag suction tube 38 are flat tubes to facilitate the movement of mud towards the borehole 1 wall when rotating with the rotary transmission component, thereby improving the cleaning efficiency. The fourth slag suction tube 38 has a second slag suction through hole on its side wall to further improve the slag suction efficiency. One end of the slurry relay pipe vertically penetrates both ends of the support plate 15, and its through hole is close to the lower rotating support pipe. Because the rotating upper cleaning component continuously pushes the mud and slag on the lower partition support component towards the well wall and promptly sucks it into the eighth rotating transmission pipe 13, the slurry flowing downwards into the bottom of the borehole 1 through the slurry relay pipe meets the requirements for cleaning the bottom. When pouring concrete into the bottom of the borehole 1, continuously rotating the third slag suction pipe 37 promotes the discharge of concrete air bubbles, further improving the pouring quality.

[0060] The construction process of the hole cleaning device for large-diameter bored piles under complex geological conditions includes:

[0061] S1: The hole cleaning device for large-diameter bored piles under complex geological conditions is hoisted into the borehole 1;

[0062] S2: Unfold the support leg and the lower partition support, and adjust the rotary transmission component to the axis of the borehole 1;

[0063] S3: Start the motor 14 to rotate in the forward direction, and clean the borehole 1 in layers through the upper cleaning component and the bottom cleaning component via the rotary transmission component. The lower partition support component effectively prevents mud from continuously falling to the bottom of the borehole 1.

[0064] S4: The rotating transmission component, which is rotated in the forward direction by the motor 14, drives the rotating wall protection component to rotate circumferentially. At the same time, the rotating wall protection component is driven downward by the wall protection power component to perform a pressing and smoothing operation on the inner wall of the borehole 1, thereby improving the stability of the mud skin on the inner wall of the borehole 1 and preventing the inner wall of the borehole 1 from falling off and collapsing (according to the characteristics of the drilled soil layer, the radial extension length of the rotating wall protection component is adjusted to automatically adjust the pressing force of the rotating wall protection component on the inner wall of the borehole 1, thereby improving the wall protection effect).

[0065] S5: After the mud and debris at the bottom of the borehole 1 and on the lower partition support are cleaned, the support leg, the rotating wall protection member and the lower partition support are retracted radially in sequence to facilitate the lower part of the steel cage to the predetermined position;

[0066] S6: Concrete is poured into the bottom of the borehole 1 through the rotary transmission component, and the rotary transmission component is rotated during the pouring process to agitate the concrete through the bottom cleaning component, so as to facilitate the discharge of air from the concrete and improve the quality of pile formation.

[0067] S7: After pouring to the predetermined depth, start the motor 14 to rotate in the opposite direction, thereby pulling the eighth rotary transmission tube 13 to retract and rise axially.

[0068] S8: After completing the pouring of the borehole 1 by repeating S7, the hole cleaning device for the large-diameter bored pile under complex geological conditions can be lifted out of the borehole 1.

[0069] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A hole cleaning device for large-diameter bored piles under complex geological conditions, characterized in that, include: A hole cleaning support is provided on the inner wall of the borehole. It includes an upper support, a hole cleaning and casting rotary transmission component, and a lower partition support. The upper support and the lower partition support provide support for the circumferential rotation of the hole cleaning and casting rotary transmission component connected to it within the borehole. The lower partition support separates the bottom of the borehole from the upper part. A wall-protecting and hole-cleaning component is mounted on the hole-cleaning and casting rotary transmission component. It includes a rotating wall-protecting component, a wall-protecting power component, and an upper hole-cleaning component. The rotating wall-protecting component rotates circumferentially on the hole-cleaning and casting rotary transmission component and is driven by the connected wall-protecting power component to move axially along the hole-cleaning and casting rotary transmission component. The upper hole-cleaning component cleans the mud and sludge on the lower partition support component on the hole-cleaning and casting rotary transmission component. The bottom cleaning component is used on the hole cleaning and casting rotary transmission component to clean the bottom of the drill hole below the lower partition support component; The upper support member includes an upper rotating support tube and support legs, with the support legs mounted on the upper rotating support tube. Each support leg includes a first support tube, a second support tube, and a first automatic telescopic rod. One end of the first support tube is mounted on the upper rotating support tube, one end of the second support tube is embedded in the other end of the first support tube, the bottom end of the first automatic telescopic rod is fixedly embedded in the first support tube, and the top end of the first automatic telescopic rod is connected to the second support tube. A friction pad is provided at the other end of the second support tube. Multiple support legs are evenly distributed circumferentially around the upper rotating support tube. The upper rotating support tube is installed at the borehole opening via the multiple support legs. The hole-cleaning and casting rotary transmission member includes a rotary transmission member and a rotary power member, both mounted on the upper support member. The rotary transmission member includes a first rotary transmission tube, a second rotary transmission tube, a third rotary transmission tube, a fourth rotary transmission tube, a fifth rotary transmission tube, a sixth rotary transmission tube, a seventh rotary transmission tube, and an eighth rotary transmission tube. One end of the first rotary transmission tube is rotatably mounted on the upper support tube. Inside the rotating support tube, one end of the second rotating transmission tube is fitted onto the other end of the first rotating transmission tube, and the first slider on the second rotating transmission tube engages with the first sliding groove on the first rotating transmission tube. The first sliding groove is L-shaped. One end of the third rotating transmission tube is slidably fitted onto the other end of the second rotating transmission tube. One end of the fourth rotating transmission tube is slidably fitted onto the other end of the third rotating transmission tube. One end of the fifth rotating transmission tube is slidably fitted onto the other end of the fourth rotating transmission tube. One end of the sixth rotating transmission tube is slidably fitted onto the other end of the fifth rotating transmission tube. One end of the seventh rotating transmission tube is slidably fitted onto the other end of the sixth rotating transmission tube. One end of the eighth rotating transmission tube is slidably fitted onto the other end of the seventh rotating transmission tube. A first one-way sealing plate is hinged to the other end of the eighth rotating transmission tube. The rotating power component includes a motor, a first gear, and a second gear. The motor is mounted on the support leg. The first gear is mounted on the motor shaft. The second gear is fixedly fitted onto the first rotating transmission tube and meshes with the first gear. Concrete is poured to the bottom of the borehole via the rotary transmission component.

2. The hole cleaning device for large-diameter bored piles under complex geological conditions according to claim 1, characterized in that, The lower partition support includes a support plate, a support barrel, a sealing airbag, a first air supply hose, an upper sealing ring, and a lower sealing ring. A lower rotating support tube is embedded at the center of the support plate. The support plate is rotatably mounted on the outer side of the eighth rotating transmission tube via the lower rotating support tube. One end of the support barrel is horizontally embedded in a support hole on the side wall of the support plate. The sealing airbag is annular in shape, with its inner ring surface fitted onto the side wall of the support plate. The other end of the support barrel penetrates the inner ring surface of the sealing airbag, and the inner side wall of the outer ring surface of the sealing airbag is connected to the other end of the support barrel. One end of the first air supply hose extends outward through one side wall of the first rotating transmission tube, and the other end of the first air supply hose extends outward through the side wall of the eighth rotating transmission tube. The upper sealing ring... A rotating sealing ring is fitted onto the outer wall of one end of the first rotating transmission tube, and the first air supply groove on the inner wall of the upper sealing ring communicates with one end of the first air supply hose; a second air supply hose is connected through the upper sealing ring, one end of the second air supply hose communicates with the first air supply groove, and the other end of the second air supply hose is connected through the air pressure pump; the lower sealing ring has the same structure as the upper sealing ring, and the rotating sealing ring is fitted onto the outer wall of the eighth rotating transmission tube, and the first air supply groove of the lower sealing ring communicates with the other end of the first air supply hose; a third air supply hose is connected through the lower sealing ring, one end of the third air supply hose communicates with the first air supply groove of the lower sealing ring, and the other end of the third air supply hose communicates with the bottom of the support hole.

3. The hole cleaning device for large-diameter bored piles under complex geological conditions according to claim 2, characterized in that, The rotating protective wall component includes a rotating protective wall seat and a protective wall smoothing component. The rotating protective wall seat is disposed on the rotating transmission component, and the protective wall smoothing component is disposed on the rotating protective wall seat. The rotating protective wall seat includes a rotating protective wall tube and a sliding transmission component. The sliding transmission component is disposed on the rotating protective wall tube and includes a transmission fixing tube, a spring, and a sliding transmission plate. One end of the transmission fixing tube passes through the rotating protective wall tube, and the spring is embedded in the other end of the transmission fixing tube. One end of the sliding transmission plate is slidably embedded in one end of the transmission fixing tube, and the other end of the sliding transmission plate is embedded in a second groove on the first rotating transmission tube. The other end of the sliding transmission plate can slide from the second groove into a third groove on the second rotating transmission tube, and then slide into a fourth groove on the third rotating transmission tube, a fifth groove on the fourth rotating transmission tube, and so on. The sliding transmission plate has a rounded corner at the other end of the sliding transmission plate within the sliding groove, the sixth sliding groove on the fifth rotating transmission tube, the seventh sliding groove on the sixth rotating transmission tube, the eighth sliding groove on the seventh rotating transmission tube, and the ninth sliding groove on the eighth rotating transmission tube. The rotating protective wall tube is fitted outside the rotating transmission component by multiple sliding transmission components. The protective wall smoothing component includes a third support tube, a fourth support tube, a second automatic telescopic rod, and a smoothing plate. The third support tube is disposed on the rotating protective wall tube, one end of the fourth support tube is embedded in the other end of the third support tube, the bottom end of the second automatic telescopic rod is embedded in the third support tube, and the top end of the second automatic telescopic rod is connected to the fourth support tube. The smoothing plate is arc-shaped and is disposed at the other end of the fourth support tube. Multiple sets of the protective wall smoothing components are evenly distributed around the circumference of the rotating protective wall tube.

4. The hole cleaning device for large-diameter bored piles under complex geological conditions according to claim 3, characterized in that, The protective wall power component includes a circumferential transmission component, a radial adjustment component, a steering control component, and a tension transmission component. The circumferential transmission component is mounted on the upper support component, the radial adjustment component is mounted on the circumferential transmission component, the steering control component is mounted on the radial adjustment component, and the tension transmission component is mounted on the radial adjustment component. The circumferential transmission component includes a circumferential transmission seat, a circumferential sliding seat, a circumferential locking tube, a first magnetic coil, and a circumferential locking shaft. The circumferential transmission seat is mounted on the lower side of the support leg, the circumferential sliding seat is embedded in the circumferential transmission seat, one end of the circumferential locking tube is disposed through the circumferential transmission seat, the first magnetic coil is embedded in the circumferential locking tube, and the circumferential locking shaft is slidably embedded in the circumferential locking tube, with the circumferential locking shaft corresponding to the locking hole on the circumferential sliding seat.

5. The hole cleaning device for large-diameter bored piles under complex geological conditions according to claim 4, characterized in that, The radial adjustment component includes a radial slide, a radial slider, a third automatic telescopic rod, and a winding tube. The radial slide is C-shaped and radially mounted on the circumferential slide. The radial slider is slidably embedded in the radial slide. The bottom end of the third automatic telescopic rod is embedded in one end of the radial slide, and the top end of the third automatic telescopic rod is connected to the radial slider. One end of the winding tube is mounted on the radial slider. Multiple sets of the radial adjustment components are evenly distributed circumferentially along the circumferential slide. The steering control component includes a second magnetic coil and a steering control... The rod, the second magnetic coil is embedded in the winding tube, the steering control rod is L-shaped, and one end of the steering control rod is slidably embedded in the winding tube; the tension transmission component includes a wire rope, a first steering wheel and a second steering wheel, one end of the wire rope is connected to one of the winding tubes, the first steering wheel is mounted on the eighth rotary transmission tube through a first fixing frame, the second steering wheel is mounted on the first rotary transmission tube through a second fixing frame, and the other end of the wire rope is connected to the rotating guard wall seat after being turned by the first steering wheel and the second steering wheel.

6. The hole cleaning device for large-diameter bored piles under complex geological conditions according to claim 4, characterized in that, The upper cleaning component includes a first slag suction pipe, a second one-way sealing plate, a second slag suction pipe, a first take-up and release fixing pipe, a third magnetic coil, and a first take-up and release drive shaft. One end of the first slag suction pipe passes through one end of the eighth rotary drive pipe. One side of the second one-way sealing plate is hinged to one end of the first slag suction pipe. One end of the second slag suction pipe is slidably embedded in the other end of the first slag suction pipe. The first take-up and release fixing pipe is disposed on the first slag suction pipe. The third magnetic coil is embedded in the first take-up and release fixing pipe. One end of the first take-up and release drive shaft is slidably embedded in the first take-up and release fixing pipe. The other end of the first take-up and release drive shaft is connected to the second slag suction pipe.

7. The hole cleaning device for large-diameter bored piles under complex geological conditions according to claim 4, characterized in that, The bottom cleaning component includes a third slag suction pipe, a third one-way sealing plate, a fourth slag suction pipe, a second take-up and release fixing pipe, a fourth magnetic coil, a second take-up and release drive shaft, and a slurry relay pipe. One end of the third slag suction pipe penetrates into the other end of the eighth rotary drive pipe. One side of the third one-way sealing plate is hinged to one end of the third slag suction pipe. One end of the fourth slag suction pipe is slidably embedded in the other end of the third slag suction pipe. The second take-up and release fixing pipe is disposed on the third slag suction pipe. The fourth magnetic coil is embedded in the second take-up and release fixing pipe. One end of the second take-up and release drive shaft is slidably embedded in the second take-up and release fixing pipe, and the other end of the second take-up and release drive shaft is connected to the fourth slag suction pipe. One end of the slurry relay pipe vertically penetrates the support plate, and its penetration point is close to the lower rotary support pipe.

8. A construction technology for a hole-cleaning device for large-diameter bored piles under complex geological conditions, using the hole-cleaning device for large-diameter bored piles under complex geological conditions as described in any one of claims 2, 4-7, characterized in that... include: S1: Hoist the large-diameter bored pile cleaning device under the complex geological conditions into the borehole; S2: Unfold the support leg and the lower partition support, and adjust the rotary transmission component to the axis of the drill hole; S3: Start the motor to rotate in the forward direction, and clean the drill hole in layers through the upper cleaning member and the bottom cleaning member via the rotary transmission member, and block the bottom of the drill hole through the lower partition support member; S4: The rotating transmission component, which is rotated in the forward direction by the motor, drives the rotating wall protection component to rotate circumferentially. At the same time, the rotating wall protection component is driven to move downward by the wall protection power component to perform a pressing and smoothing operation on the inner wall of the borehole. S5: After the mud and debris on the bottom of the borehole and the lower partition support are cleaned, the support leg, the rotating wall protection member and the lower partition support are retracted radially in sequence to facilitate the lowering of the steel cage to the predetermined position; S6: Concrete is poured into the bottom of the borehole through the rotary transmission component, and the rotary transmission component is rotated during the pouring process to agitate the concrete through the bottom cleaning component; S7: After pouring to the predetermined depth, start the motor to rotate in the reverse direction, thereby pulling the eighth rotary transmission tube to retract and rise axially. S8: After completing the drilling and pouring of the hole as described in S7, the hole cleaning device for the large-diameter bored pile under complex geological conditions can be lifted out of the hole.

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