A bored pile construction device and a construction method thereof

Abstract

The present invention provides a bored pile construction device and a construction method thereof. The bored pile construction device comprises a moving device, a supporting frame, a transport device, an excavating device and a lifting device, wherein the lifting device is installed on the supporting frame, a slag recovery plate is provided at the bottom of the supporting frame, and an excavation opening is provided on the slag recovery plate, the excavating device is installed on the lifting device, and is directly opposite to the excavation opening, and moves up and down along the supporting frame under the action of the lifting device; the excavating device comprises a primary rough excavation and a secondary fine excavation, wherein the primary rough excavation is completed by driving a spiral rod and a spiral cutter by the lifting device; the secondary fine excavation mechanism comprises an arc cleaning plate and a sliding rod; after the primary rough excavation is completed, the pile hole wall is smoothed and compacted by controlling the arc cleaning plate to move along the spiral groove on the spiral rod, and the excavated soil is transported to the soil storage box by the transport device, so as to ensure that there is no soil pile around the construction to affect the construction, and to ensure the accuracy of the bored pile excavation.

Description

Technical Field

[0001] The invention relates to the field of geotechnical engineering, and in particular to a portable bored pile construction device and a construction method thereof. Background Art

[0002] Bored piles are first dug by manpower to form a pile hole, and while digging downwards, the hole wall is lined to ensure construction safety. After cleaning the bottom of the hole, concrete is poured. This method can form large-sized piles, which meets the urgent demand for large-diameter piles in high-rise buildings. It is very suitable for my country's national conditions with low labor costs and has no impact on the surrounding environment. Therefore, it was quickly promoted throughout the country and became a common pile type for pile foundations of high-rise buildings in some areas; however, the existing bored piles are mostly completed manually, which is time-consuming and labor-intensive, and the construction efficiency is low. In addition, during the construction process, a manhole needs to be entered into the hole for excavation. If the geological environment is affected and soil collapses, it will bring safety hazards to the constructors.

[0003] The invention with publication number CN107964995B discloses a pile foundation digging device, the device includes an excavating mechanism suspended by a traction system, the excavating mechanism includes a counterweight block and a group of sub-plates hinged at the lower end thereof and used to combine to form a pre-drilled hole shape, a telescopic shaft is provided through the middle of the counterweight block, a hinged rod is connected between the lower end of the telescopic shaft and all the sub-plates, a return spring is provided between the lower end of the telescopic shaft and the lower end of the counterweight block, the return spring is sleeved on the outer circumference of the telescopic shaft, all the sub-plates form an open and close excavating cylinder by means of the vertical reciprocating movement of the telescopic shaft, an expansion mechanism is symmetrically provided on the outer circumference of the counterweight block, the expansion mechanism includes a mounting frame and an expansion plate fixed at the outer end thereof, the mounting frame is a triangular structure formed by connecting a horizontal rod and an oblique rod, the device is efficient when working, a small foundation pit is formed, a small amount of backfill is formed, it is not easy to collapse in the later stage, and the safety is high, but there will still be some unevenness on the pile wall, and the excavated soil will accumulate around the pile hole, affecting the normal progress of construction. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a bored pile construction device and a construction method thereof, which can not only solve the problems of low efficiency and high cost of existing manual digging and uneven hole walls of existing mechanical pile digging, but also solve the problems of soil transportation and storage during pile digging, thereby avoiding soil accumulation affecting construction.

[0005] In order to solve the above technical problems, the present invention provides a bored pile construction device, which includes a moving device, a supporting frame, a transporting device, an excavating device and a lifting device, wherein the lifting device is installed on the supporting frame, a slag recovery plate is provided at the bottom of the supporting frame, and an excavation opening is provided on the slag recovery plate, the excavating device is installed on the lifting device and faces the excavation opening, and moves up and down along the supporting frame under the action of the lifting device;

[0006] The mobile device includes a frame and a walking mechanism located at the bottom of the frame, the support frame is located at the rear of the frame, connected to the frame through a flip mechanism, and rotates upward and is placed on the frame or rotates downward and is vertically placed at the rear of the frame under the action of the flip mechanism; a soil storage box is fixedly installed below one side of the frame adjacent to the support frame;

[0007] The lifting device comprises a lifting screw, a lifting frame, a first driving motor and a transmission assembly; the lifting screw is vertically arranged in the support frame and is rotatably connected to the support frame, the lifting frame is located in the support frame and is threadedly connected to the lifting screw, the first driving motor is installed on the top of the support frame, and is connected to the lifting screw through the transmission assembly, and drives the lifting screw to rotate;

[0008] The excavation device comprises a second drive motor, a primary rough excavation mechanism, a secondary fine excavation mechanism and a secondary fine excavation mechanism locking mechanism. The primary rough excavation mechanism comprises a spiral rod connected to the second drive motor in a transmission manner and a spiral cutter arranged along the spiral rod. The spiral rod is rotatably connected to the lifting frame, and the second drive motor drives the spiral rod to rotate. A spiral groove is provided on the spiral rod. The secondary fine excavation mechanism comprises an arc-shaped cleaning plate and a sliding rod. The arc-shaped cleaning plate is vertically arranged on the edge of the spiral cutter. One end of the sliding rod is connected to the arc-shaped cleaning plate, and the other end is embedded in the spiral groove. The secondary fine excavation locking mechanism is located at the top of the spiral rod, and comprises an electric push rod and a limit card pin. A limit card slot is correspondingly provided on the arc-shaped cleaning plate. When the arc-shaped cleaning plate is located at the uppermost end of the spiral cutter, the limit card pin is controlled by the electric push rod to be embedded in the limit card slot to lock it.

[0009] The transport device includes a third drive motor, a belt transmission assembly and a slag conveyor belt connecting the slag recovery plate and the soil storage box. The third drive motor drives the slag conveyor belt through the belt transmission assembly to transport the slag on the slag recovery plate to the soil storage box.

[0010] The better technical solution of the present invention is as follows: the frame is a plate structure, the flipping mechanism includes a rotating frame and a hydraulic cylinder, the supporting frame is rotatably connected to the rear end of the frame through the rotating frame, the hydraulic cylinder is installed in the middle part of the frame, and its piston end is connected to the frame; and the supporting frame is driven to rotate along the rotating frame when the hydraulic cylinder is in a telescopic state; a trailer connecting piece is provided on the side of the frame away from the supporting frame.

[0011] The preferred technical solution of the present invention is as follows: the excavating device also includes a regulating component arranged on the lifting frame; the regulating component includes a regulating box and a sliding block and a wedge-shaped push block located in the regulating box, the electric push rod is located outside the regulating box, the push rod end thereof extends into the regulating box and is connected with the sliding block, the wedge surface of the wedge-shaped push block faces the sliding block, and the sliding block is provided with an inclined surface matching the wedge-shaped push block; the wedge push block is connected with a limit pin through an elastic connecting rod, and the sliding block moves along the regulating box under the action of the electric push rod to squeeze the wedge push block so that the limit pin is correspondingly embedded in the limit slot on the cleaning plate; the elastic connecting rod is a spring sleeved on the outside of the connecting rod, one end of the spring is connected with the corresponding wedge-shaped push block, and the other end is fixed to the inner wall of the regulating box; a stabilizing frame is provided at the connecting portion of the spiral rod and the second driving motor, the stabilizing frame is connected with the lifting frame, and the spiral rod is rotatably connected with the stabilizing frame.

[0012] The preferred technical solution of the present invention is as follows: two lifting screws are provided and are arranged in parallel on one side of the excavating device, the two lifting screws are located between the top frame and the bottom frame of the supporting frame, and the lower ends are rotatably connected to the bottom frame; the transmission assembly includes pulley one and pulley two coaxially installed at the protruding end of the first driving motor, and pulley three and pulley four are respectively installed on the two lifting screws, pulley one is connected to pulley transmission through belt one, and pulley two is connected to pulley four through belt two.

[0013] The preferred technical solution of the present invention is as follows: the supporting frame is a square frame, the lifting frame is a square structure whose size is smaller than or matches the cross-section of the inner frame of the supporting frame, the lifting screw is arranged on one side of the lifting frame, and the lifting screw is not arranged on the same side or the opposite side of the flipping mechanism; 1 to 3 limiting sliding rods are arranged on the side of the lifting frame opposite to the lifting screw, the length of the limiting sliding rod matches the lifting screw, and the limiting sliding rod is fixed on the supporting frame, and a sliding hole is correspondingly provided on the lifting frame, and is slidably connected to the sliding rod through the sliding hole.

[0014] The preferred technical solution of the present invention is as follows: the slag recovery plate is an inclined plate with a lower side connected to the slag conveyor belt, and a retaining plate is provided on the lower side edge of the slag recovery plate, and a slag outlet is provided at the connection position of the retaining plate corresponding to the slag conveyor belt, and a slag inlet is provided at the position where the soil storage box is connected to the slag conveyor belt, one end of the slag conveyor belt is connected to the slag outlet, and the other end extends into the soil storage box through the slag inlet; the inner diameter of the digging opening is larger than the diameter of the spiral cutting cutter or matches the spiral cutting cutter, and under the action of the lifting device, the spiral digging mechanism moves up and down along the digging opening to realize the construction of the pile hole.

[0015] The preferred technical solution of the present invention is as follows: the belt transmission assembly includes a first rotating shaft and a second rotating shaft installed on the slag conveyor belt and drivingly connected to the slag conveyor belt, the first rotating shaft is connected to the output end of the third driving motor, and the slag conveyor belt is driven to work by the third driving motor; the third driving motor is installed in the soil storage box, and support plates are symmetrically distributed on both sides of the slag conveyor belt, the two ends of the two support plates are respectively connected to the first rotating shaft and the second rotating shaft, a fixed plate is rotatably installed on the support plate, and the fixed plate is connected to the frame.

[0016] The preferred technical solution of the present invention is as follows: the cleaning plate is provided with a cleaning sheet, wherein two cleaning sheets are symmetrically mounted on one side of the cleaning plate adjacent to the spiral rod and perpendicular to the cleaning plate, and the two cleaning sheets are in contact with or perpendicular to the upper surface of the spiral cutter.

[0017] In order to solve the above technical problems, the present invention also provides a construction method of a bored pile construction device, which is characterized by the following specific steps:

[0018] Step 1: Determine, control and check the axis position of each pile; through surveying, establish 6 permanent control points in the foundation pit, arranged in an "I" shape, and use this orthogonal axis control network to determine, control and check the axis position of each pile;

[0019] Step 2: Preparation before construction: measure the pile position on site and mark the pile position, then clean up the stones and obstacles around the pile position;

[0020] Step 3: Move the bored pile construction device of the present invention to the first pile position mark point by a trailer, and flip the support frame on which the excavation device is installed downward by a flip mechanism so that the digging opening at the bottom of the support frame faces the marked pile position;

[0021] Step 4: Before digging, the cleaning plate is located at the top edge of the spiral cutter. At this time, the electric push rod is started, and the limit pin is driven by the electric push rod to get into the cleaning plate. The secondary fine digging mechanism is locked, and the primary digging of the pile hole begins;

[0022] Step 5: Start the first drive motor and the second drive motor at the same time, the first drive motor drives the excavation device to move downward along the support frame, and the second drive motor drives the spiral rod and the spiral cutter to rotate to perform pile hole excavation; during the excavation process, the slag is brought to the slag recovery plate at the bottom of the support frame by the rotation of the spiral cutter, and the slag is transported to the soil storage box by the transport device;

[0023] Step 6: When the first-level rough excavation reaches the bottom of the pile hole, the electric push rod is controlled to drive the limit pin to move out of the limit slot on the cleaning plate, and the second-level fine excavation mechanism is unlocked; the first driving mechanism is stopped, and the spiral rod and the spiral cutter stay in the initially formed pile hole, and the second driving motor continues to work, the spiral stem and the spiral cutter rotate in the formed pile hole, and the cleaning plate contacts the wall of the pile hole. Under the action of friction, the cleaning plate moves downward along the spiral rod to smooth the wall of the pile hole; the slag excavated from the second-level fine excavation is brought to the slag recovery plate at the bottom of the support frame by the rotation of the spiral cutter, and the slag is transported to the soil storage box by the transportation device;

[0024] Step 7: After the secondary excavation is completed, the first driving mechanism is turned on, and the first driving mechanism drives the lifting frame to move upward. At the same time, the second driving motor continues to work, driving the spiral rod, spiral cutter and cleaning plate to continue to rotate, and the hole wall can be smoothed and compacted again. After the excavation device is completely raised to the support frame, the excavation work is completed;

[0025] Step 8: After the excavation is completed, the support frame is flipped upward 90 degrees through the flipping mechanism so that it can be placed squarely on the frame. It can then be moved to the next pile position mark point by a trailer to carry out the excavation of the next hole pile.

[0026] A more preferred technical solution of the present invention: in the step six, during the secondary fine excavation, the cleaning sheet on the cleaning plate moves along the surface of the spiral cutter to clean the residual debris on the spiral cutter.

[0027] Beneficial effects of the present invention:

[0028] (1) The excavation mechanism of the present invention includes a primary rough excavation unit and a secondary fine excavation unit. The primary excavation unit adopts a spiral drill rod, and a lifting device is used to drive the spiral drill rod to perform rough excavation of the pile hole. After the rough excavation is completed, the secondary fine excavation unit is used to grind the hole pile wall and reinforce the hole pile wall, which not only solves the problems of high cost and low efficiency of manual excavation, but also solves the problem of uneven hole wall of the pile hole constructed by the existing excavation mechanism.

[0029] (2) The present invention is provided with a soil transport and storage mechanism. During the excavation process, the excavated soil is brought to a soil recovery plate by a spiral cutter, and then transported to a storage box by a conveyor belt. After the excavation is completed, the soil is transported to a slag dumping area, thereby solving the problem of soil stacking during pile hole excavation and avoiding the impact of soil accumulation around the pile hole on construction.

[0030] (3) The present invention controls the lifting and lowering of the spiral drill rod through the lifting device, thereby controlling the excavation depth of the spiral drill rod, and can achieve fixed-depth excavation of the pile hole, ensuring that the excavation depth of each pile hole remains consistent.

[0031] (4) The excavation device in the present invention is provided with a mobile mechanism. After excavation is completed, the entire device can be stored on the mobile mechanism, and the excavation device can be transferred and carried by a trailer, thereby achieving portability of the excavation device.

[0032] (5) The present invention only requires one worker to supervise and control the construction process. During the entire excavation process, no human intervention is required, which realizes the mechanical automation of pile foundation excavation, improves the excavation efficiency, reduces labor costs, and ensures the safety of labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 and Figure 2 It is a three-dimensional diagram of the present invention at different angles;

[0034] Figure 3 It is a front schematic diagram of the present invention;

[0035] Figure 4 and Figure 5 Schematic diagrams of the connection between the mobile device and the support frame at different angles;

[0036] Figure 6 for Figure 3 A magnified schematic diagram of the middle part;

[0037] Figure 7 It is a structural schematic diagram of the transport device;

[0038] Figure 8 and Fig. 9 It is a structural schematic diagram of the lifting device at different angles;

[0039] Fig.10 for Figure 8 The enlarged schematic diagram of the middle B part;

[0040] Fig.11 Schematic diagram of the excavation device in the present invention Figure 1 ;

[0041] Fig.12 for Fig.11 Enlarged schematic diagram of middle C part;

[0042] Fig.13 Schematic diagram of the excavation device in the present invention Figure 2 ;

[0043] Fig.14 for Fig.12 The enlarged schematic diagram of the middle D part;

[0044] Fig.15 Schematic diagram of the excavation device in the present invention Figure 3 ;

[0045] Fig.16 for Fig.15 The enlarged schematic diagram of the middle E part;

[0046] Fig.17 This is a schematic diagram of the locked state of the secondary fine excavation cleaning plate;

[0047] Fig.18 for Fig.17 Enlarged schematic diagram of the middle F part;

[0048] Fig.19 A schematic diagram of the excavating device of the present invention being installed on a supporting frame;

[0049] Fig. 20 for Fig.18 Enlarged schematic diagram of the middle G section;

[0050] Fig.21 It is a reference diagram of the use status of the present invention.

[0051] Figure numbers: 1-mobile device; 101-frame; 102-hydraulic cylinder; 103-soil storage box; 104-traveling mechanism; 105-rotating frame, 106-trailer connecting piece; 2-support frame; 201-slag recovery plate; 202-digging mouth; 203-retaining plate; 204-slag outlet; 3-transportation device; 301-third drive motor; 302-first rotating shaft; 303-support plate; 304-slag conveyor belt; 305-fixed plate; 306-second rotating shaft; 4-excavation device; 401-spiral cutter; 402-screw rod; 403- Stabilizing frame; 404-second driving motor; 405-regulating box; 406-sliding block; 407-elastic connecting rod; 408-limiting pin; 409-wedge-shaped push block; 410-limiting slot, 411-electric push rod; 412-cleaning plate; 413-cleaning sheet; 414-sliding rod; 5-lifting device; 501-lifting screw; 502-lifting frame; 503-first driving motor; 504-pulley one; 505-pulley two; 506-pulley three; 507-belt one; 508-pulley four; 509-belt two; 510-limiting sliding rod. DETAILED DESCRIPTION

[0052] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and through specific implementation methods. The accompanying drawings are only used for exemplary descriptions, and only represent schematic diagrams rather than physical drawings, and cannot be understood as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0053] A bored pile construction device is provided in the first embodiment. Figure 1-Figure 3As shown, it includes a moving device 1, a supporting frame 2, a transport device 3, an excavating device 4 and a lifting device 5. The lifting device 5 is installed on the supporting frame 2. A slag recovery plate 201 is provided at the bottom of the supporting frame 2, and an excavation opening 202 is provided on the slag recovery plate 201. The excavating device 4 is installed on the lifting device 5 and faces the excavation opening 202. Under the action of the lifting device 5, it moves up and down along the supporting frame 2. The inner diameter of the excavation opening 202 is larger than the diameter of the spiral cutting cutter 401 or matches the spiral cutting cutter 401. Under the action of the lifting device 5, the spiral excavation mechanism moves up and down along the excavation opening 202 to realize the construction of the pile hole. Figure 4 and Figure 5 As shown, the mobile device 1 includes a frame 101 and a walking mechanism 104 located at the bottom of the frame 101, the frame 101 is a plate structure, the support frame 2 is located at the rear of the frame 101, is connected to the frame 101 through a flipping mechanism, and is rotated upward and placed on the frame 101 or rotated downward and vertically placed at the rear of the frame 101 under the action of the flipping mechanism; the flipping mechanism includes a rotating frame 105 and a hydraulic cylinder 102, the support frame 2 is rotatably connected to the rear of the frame 101 through the rotating frame 105, the hydraulic cylinder 102 is installed in the middle part of the frame 101, and its piston end is connected to the frame 101; and the hydraulic cylinder 102 drives the support frame 2 to rotate along the rotating frame 105 when the hydraulic cylinder 102 is in a telescopic state; a soil storage box 103 is fixedly installed at the lower side of the frame 101 adjacent to the support frame 2; a trailer connector 106 is provided on the side of the frame 101 away from the support frame 2.

[0054] A bored pile construction device provided in an embodiment, such as Figure 8 and Fig. 9As shown, the lifting device 5 includes a lifting screw 501, a lifting frame 502, a first drive motor 503 and a transmission assembly; the support frame 2 is a square frame, the lifting frame 502 is a square structure whose size is smaller than or matches the cross-section of the inner frame of the support frame 2, two lifting screws 501 are vertically arranged in the support frame 2 and rotatably connected to the support frame 2, the lifting frame 502 is located in the support frame 2 and is threadedly connected to the lifting screw 501, and the lifting screw 501 is arranged on the lifting frame 502, and the lifting screw 501 is not arranged on the same side or the opposite side of the flip mechanism, the two lifting screws 501 are located between the top frame and the bottom frame of the support frame 2, and the lower ends are rotatably connected to the bottom frame; 1 to 3 limiting slide bars 510 are arranged on the side of the lifting frame 502 opposite to the lifting screw 501, the length of the limiting slide bar 501 matches the lifting screw 501, and is fixed on the support frame 2, and the lifting frame 502 is correspondingly provided with a sliding hole, and is slidably connected to the slide bar 510 through the sliding hole. The first driving motor 503 is installed on the top of the supporting frame 2, is connected to the lifting screw 501 through a transmission assembly, and drives the lifting screw 501 to rotate; the transmission assembly includes a pulley 1 504 and a pulley 2 505 coaxially installed at the protruding end of the first driving motor 503, and a pulley 3 506 and a pulley 4 508 are respectively installed on the two lifting screws 501, the pulley 1 504 is connected to the pulley 506 through a belt 1 507, and the pulley 2 505 is connected to the pulley 4 508 through a belt 2 509. Start the first drive motor 503, the output end of the first drive motor 503 drives pulley one 504 and pulley two 505 to move, pulley one 504 drives pulley three 506 to move via belt one 507, pulley three 506 drives the lifting screw 501 to move, pulley two 505 drives pulley four 508 to move via belt two 509, pulley four 508 drives screw two 512 to move, and the lifting screw 501 and screw two 512 drive the lifting frame 502 to move.

[0055] A bored pile construction device provided in an embodiment, such as Figures 11 to 18As shown, the excavation device 4 includes a second drive motor 404, a primary rough excavation mechanism, a secondary fine excavation mechanism and a secondary fine excavation mechanism locking mechanism. The primary rough excavation mechanism includes a spiral rod 402 drivingly connected to the second drive motor 404 and a spiral cutter 401 arranged along the spiral rod 402. The spiral rod 402 is rotatably connected to the lifting frame 502, and the second drive motor 404 drives the spiral rod 402 to rotate. A spiral groove is provided on the spiral rod 402. The secondary fine excavation mechanism includes an arc cleaning plate 412 and a sliding rod 414. The arc cleaning plate 412 is vertically arranged at the edge of the spiral cutting cutter 401, one end of the sliding rod 414 is connected to the arc cleaning plate 412, and the other end is embedded in the spiral groove; the secondary precision digging locking mechanism is located at the top of the spiral rod 402, including an electric push rod 411 and a limit card pin 408, and a limit card slot 415 is correspondingly provided on the arc cleaning plate 412, and when the arc cleaning plate 412 is located at the uppermost end of the spiral cutting cutter 401, the limit card pin 408 is controlled by the electric push rod 411 to be embedded in the limit card slot 415 to lock it; the excavation device The device 4 also includes a regulating component arranged on the lifting frame 520; the regulating component includes a regulating box 405 and a sliding block 406 and a wedge-shaped push block 409 located in the regulating box 405; the electric push rod 411 is located outside the regulating box 405, and its push rod end extends into the regulating box 405 and is connected to the sliding block 406; the wedge-shaped surface of the wedge-shaped push block 409 faces the sliding block 406, and the sliding block 406 is provided with an inclined surface matching the wedge-shaped push block 409; the wedge-shaped push block 409 is connected to the limit pin 408 through an elastic connecting rod 407, The sliding block 406 moves along the regulating box 405 under the action of the electric push rod 411 to squeeze the wedge-shaped push block 409 so that the limit pin 408 is correspondingly embedded in the limit slot 410 on the cleaning plate 412; the elastic connecting rod is a spring sleeved outside the connecting rod, one end of the spring is connected to the corresponding wedge-shaped push block, and the other end is fixed to the inner wall of the regulating box 405; a stabilizing frame 403 is provided at the connection part between the spiral rod 402 and the second driving motor 404, the stabilizing frame 403 is connected to the lifting frame 502, and the spiral rod 402 is rotatably connected to the stabilizing frame 403. A cleaning sheet 413 is provided on the cleaning plate 412, and the cleaning sheet 413 has two pieces, which are symmetrically installed on the side of the cleaning plate 412 adjacent to the spiral rod 402 and perpendicular to the cleaning plate 412, and the two cleaning sheets 413 are in contact with or perpendicular to the upper surface of the spiral cutter 401.

[0056] A bored pile construction device provided in an embodiment, such as Figure 6 and Figure 7 As shown, the transport device includes a third drive motor 301, a belt transmission assembly, and a slag conveyor belt 304 connecting the slag recovery plate 201 and the soil storage box 103. The third drive motor 301 drives the slag conveyor belt 304 through the belt transmission assembly to transport the slag on the slag recovery plate 201 to the soil storage box 103. Fig. 9 As shown, the slag recovery plate 201 is an inclined plate with a lower side connected to the slag conveyor belt 304, and a retaining plate 203 is provided at the lower side edge of the slag recovery plate 201, and a slag outlet 204 is provided at the connection position of the retaining plate 203 corresponding to the slag conveyor belt 304, and a slag inlet is provided at the position where the soil storage box 103 is connected to the slag conveyor belt 304; Figure 6 As shown, one end of the slag conveyor belt 304 is connected to the slag outlet 204, and the other end extends into the soil storage box 103 through the slag inlet. Figure 7 As shown, the belt transmission assembly includes a first rotating shaft 302 and a second rotating shaft 306 installed on the slag conveyor belt 304 and drivingly connected to the slag conveyor belt 304. The first rotating shaft 302 is connected to the output end of the third driving motor 301, and the slag conveyor belt 304 is driven by the third driving motor 301 to work; the third driving motor 301 is installed in the soil storage box 103, and support plates 303 are symmetrically distributed on both sides of the slag conveyor belt 304. The two ends of the two support plates 303 are respectively connected to the first rotating shaft 302 and the second rotating shaft 306. A fixing plate 305 is rotatably installed on the support plate 303, and the fixing plate 305 is connected to the frame 101. Start the third driving motor 301, the output end of the third driving motor 301 drives the first rotating shaft 302 to move, and the first rotating shaft 302 drives the second rotating shaft 306 to move through the slag conveyor belt 304.

[0057] The working process of the present invention is as follows: the hydraulic cylinder 102 is started, the cylinder arm of the hydraulic cylinder 102 drives the support frame 202 to move, the electric push rod 411 is started, the cylinder arm of the electric push rod 411 drives the sliding block 406 to move, the sliding block 406 drives the wedge-shaped push block 409 to move, the wedge-shaped push block 409 is compressed, and drives the limit pin 408 to be stuck in the upper groove of the cleaning plate 412, the first-level rough excavation unit starts to work, the second drive motor 404 is started, and the output end of the second drive motor 404 drives the screw and the spiral cutting cutter 4 01 movement; start the first drive motor 503, the output end of the first drive motor 503 drives the pulley 1 504 and the pulley 2 505 to move, the pulley 1 504 drives the pulley 3 506 to move through the belt 1 507, the pulley 3 506 drives the lifting screw 501 to move, the pulley 2 505 drives the pulley 4 508 to move through the belt 2 509, the pulley 4 508 drives the screw 2 512 to move, and the lifting screw 501 and the screw 2 512 drive the lifting frame 502 to move; Fig.21The pile hole excavation work begins, the soil brought up by the spiral blades on the spiral cutter 401 is transported to the soil storage box 103 by the transportation device 3, the third drive motor 301 is started, the output end of the third drive motor 301 drives the first rotating shaft 302 to move, the first rotating shaft 302 drives the second rotating shaft 306 to move through the slag conveyor belt 304, and the slag is transported to the soil storage box 103. After the pile hole is formed, the electric push rod 411 is controlled to drive the sliding block 406 to retract, and the limit pin 408 is reset by the spring force on the elastic connecting rod, but does not drive the wedge-shaped push block 409 to move, and the secondary precision excavation unit starts to work. At this time, the excavation device is located in the formed hole, and its arc-shaped cleaning plate 412 is attached to the hole wall, and the spiral rod 412 continues to rotate. The spiral rod 412 rotates in place. Due to the effect of friction, the sliding rod 414 moves in the sliding groove on the spiral rod 402, and the sliding rod 414 drives the cleaning plate 412 to move, and smoothes and compacts the pile hole wall during the movement; at the same time, the cleaning The plate 412 drives the two cleaning plates 413 to move, and cleans the residual soil on the spiral cutter 401. The soil excavated by the secondary fine excavation unit is transported to the soil storage box 103 by the transport device 3. After the excavation is completed, the electric push rod 411 drives the sliding block 406 to retract, and the sliding block 406 drives the wedge push block 409 to move. The inclined surface on the wedge push block 409 contacts the inclined surface on the reset wedge block on the control box 405, and the wedge push block 409 is reset. The lifting device 5 drives the excavation device 4 to move upward and reset. During the upward movement, the cleaning plate 412 can scrape the hole wall again. After the lifting device 5 is reset, the cylinder arm of the hydraulic cylinder 102 drives the support frame 2 to move.

[0058] Embodiment 2 provides a construction method of a bored pile excavation device, specifically using the bored pile excavation device in the above embodiment 1, including the following steps:

[0059] Step 1: Determine, control and check the axis position of each pile; through surveying, establish 6 permanent control points in the foundation pit, arranged in an "I" shape, and use this orthogonal axis control network to determine, control and check the axis position of each pile;

[0060] Step 2: Pre-construction preparation: the on-site personnel notify the surveying team in advance, measure the pile positions on site and mark them, then clean up the stones and obstacles around the pile positions and review the data again.

[0061] Step 3: Move the bored pile construction device of the present invention to the first pile position mark point by a trailer, and flip the support frame on which the excavation device is installed downward by a flip mechanism so that the digging opening at the bottom of the support frame faces the marked pile position;

[0062] Step 4: Before digging, the cleaning plate is located at the top edge of the spiral cutter. At this time, the electric push rod is started, and the limit pin is driven by the electric push rod to get into the cleaning plate. The secondary fine digging mechanism is locked, and the primary digging of the pile hole begins;

[0063] Step 5: Start the first drive motor and the second drive motor at the same time, the first drive motor drives the excavation device to move downward along the support frame, and the second drive motor drives the spiral rod and the spiral cutter to rotate to perform pile hole excavation; during the excavation process, the slag is brought to the slag recovery plate at the bottom of the support frame by the rotation of the spiral cutter, and the slag is transported to the soil storage box by the transport device;

[0064] Step 6: When the first-level rough excavation reaches the bottom of the pile hole, the electric push rod is controlled to drive the limit pin to move out of the limit slot on the cleaning plate, and the second-level fine excavation mechanism is unlocked; the first driving mechanism is stopped, and the spiral rod and the spiral cutter stay in the initially formed pile hole, and the second driving motor continues to work, the spiral stem and the spiral cutter rotate in the formed pile hole, and the cleaning plate contacts the wall of the pile hole. Under the action of friction, the cleaning plate moves downward along the spiral rod to smooth the wall of the pile hole; the slag excavated from the second-level fine excavation is brought to the slag recovery plate at the bottom of the support frame by the rotation of the spiral cutter, and the slag is transported to the soil storage box by the transportation device;

[0065] Step 7: After the secondary excavation is completed, the first driving mechanism is turned on, and the first driving mechanism drives the lifting frame to move upward. At the same time, the second driving motor continues to work, driving the spiral rod, spiral cutter and cleaning plate to continue to rotate, and the hole wall can be smoothed and compacted again. After the excavation device is completely raised to the support frame, the excavation work is completed;

[0066] Step 8: After the excavation is completed, the support frame is flipped upward 90 degrees through the flip mechanism, so that it is placed squarely on the frame, and it can be moved to the next pile position mark point by trailer to carry out the excavation of the next hole pile.

[0067] The above is only one embodiment of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims

1. A bored pile construction device, characterized in that: The construction device comprises a moving device (1), a supporting frame (2), a transporting device (3), an excavating device (4) and a lifting device (5); the lifting device (5) is mounted on the supporting frame (2); a slag recovery plate (201) is provided at the bottom of the supporting frame (2); and an excavating opening (202) is provided on the slag recovery plate (201); the excavating device (4) is mounted on the lifting device (5) and faces the excavating opening (202), and moves up and down along the supporting frame (2) under the action of the lifting device (5); The mobile device (1) comprises a vehicle frame (101) and a walking mechanism (104) located at the bottom of the vehicle frame (101); the support frame (2) is located at the rear of the vehicle frame (101), connected to the vehicle frame (101) via a flip mechanism, and rotates upwards to be placed on the vehicle frame (101) or rotates downwards to be vertically placed at the rear of the vehicle frame (101) under the action of the flip mechanism; a soil storage box (103) is fixedly installed below one side of the vehicle frame (101) adjacent to the support frame (2); The lifting device (5) comprises a lifting screw (501), a lifting frame (502), a first drive motor (503) and a transmission assembly; the lifting screw (501) is vertically arranged in the support frame (2) and is rotatably connected to the support frame (2); the lifting frame (502) is located in the support frame (2) and is threadedly connected to the lifting screw (501); the first drive motor (503) is installed on the top of the support frame (2) and is connected to the lifting screw (501) through the transmission assembly, and drives the lifting screw (501) to rotate; The excavation device (4) comprises a second drive motor (404), a primary rough excavation mechanism, a secondary fine excavation mechanism and a secondary fine excavation mechanism locking mechanism. The primary rough excavation mechanism comprises a spiral rod (402) drivingly connected to the second drive motor (404) and a spiral cutter (401) arranged along the spiral rod (402). The spiral rod (402) is rotationally connected to a lifting frame (502). The second drive motor (404) drives the spiral rod (402) to rotate. A spiral groove is provided on the spiral rod (402). The secondary fine excavation mechanism comprises an arc-shaped cleaning plate (412) and a sliding rod (414). The arc-shaped cleaning plate (412) is vertically arranged on the edge of the spiral cutting cutter (401); one end of the sliding rod (41) is connected to the arc-shaped cleaning plate (412), and the other end is embedded in the spiral groove; the secondary precision digging locking mechanism is located at the top of the spiral rod (402), including an electric push rod (411) and a limit card pin (408); a limit card slot (415) is correspondingly provided on the arc-shaped cleaning plate (412); and when the arc-shaped cleaning plate (412) is located at the uppermost end of the spiral cutting cutter (401), the limit card pin (408) is controlled by the electric push rod (411) to be embedded in the limit card slot (415) to lock it; The transport device comprises a third drive motor (301), a belt transmission assembly and a slag conveyor belt (304) connecting the slag recovery plate (201) and the soil storage box (103); the third drive motor (301) drives the slag conveyor belt (304) through the belt transmission assembly to transport the slag on the slag recovery plate (201) into the soil storage box (103).

2. A bored pile construction device according to claim 1, characterized in that: The vehicle frame (101) is a plate structure, the turning mechanism comprises a rotating frame (105) and a hydraulic cylinder (102), the supporting frame (2) is rotatably connected to the rear of the vehicle frame (101) via the rotating frame (105), the hydraulic cylinder (102) is installed in the middle of the vehicle frame (101), and its piston end is connected to the vehicle frame (101); and when the hydraulic cylinder (102) is in a telescopic state, the supporting frame (2) is driven to rotate along the rotating frame (105); and a trailer connecting piece (106) is provided on a side of the vehicle frame (101) away from the supporting frame (2).

3. A bored pile construction device according to claim 1 or 2, characterized in that: The excavating device (4) further comprises a regulating assembly arranged on the lifting frame (520); the regulating assembly comprises a regulating box (405), a sliding block (406) and a wedge-shaped push block (409) located in the regulating box (405); the electric push rod (411) is located outside the regulating box (405); the end of the push rod extends into the regulating box (405) and is connected to the sliding block (406); the wedge-shaped surface of the wedge-shaped push block (409) faces the sliding block (406); the sliding block (406) is provided with an inclined surface matching the wedge-shaped push block (409); the wedge-shaped push block (409) is connected to the limit pin (408) through an elastic connecting rod (407) The sliding block (406) is connected to the regulating box (405), and under the action of the electric push rod (411), the sliding block (406) moves along the regulating box (405) to squeeze the wedge-shaped push block (409) so that the limiting latch pin (408) is correspondingly embedded in the limiting latch groove (410) on the cleaning plate (412); the elastic connecting rod is a spring sleeved on the outside of the connecting rod, one end of the spring is connected to the corresponding wedge-shaped push block, and the other end is fixed to the inner wall of the regulating box (405); a stabilizing frame (403) is provided at the connecting portion between the spiral rod (402) and the second driving motor (404), the stabilizing frame (403) is connected to the lifting frame (502), and the spiral rod (402) and the stabilizing frame (403) are rotatably connected.

4. A bored pile construction device according to claim 1 or 2, characterized in that: The lifting screw rods (501) are provided with two, which are arranged in parallel on one side of the excavating device (4), and the two lifting screw rods (501) are located between the top frame and the bottom frame of the supporting frame (2), and the lower ends are rotatably connected with the bottom frame; the transmission assembly comprises a pulley 1 (504) and a pulley 2 (505) coaxially installed on the protruding end of the first driving motor (503), and a pulley 3 (506) and a pulley 4 (508) are respectively installed on the two lifting screw rods (501), the pulley 1 (504) is connected to the pulley 506 through a belt 1 (507), and the pulley 2 (505) is connected to the pulley 4 (508) through a belt 2 (509).

5. A bored pile construction device according to claim 1 or 2, characterized in that: The support frame (2) is a square frame, the lifting frame (502) is a square structure whose size is smaller than or matches the cross section of the inner frame of the support frame (2), the lifting screw (501) is arranged on one side of the lifting frame (502), and the lifting screw (501) is not arranged on the same side or the opposite side of the flip mechanism; 1 to 3 limiting slide bars (510) are arranged on the side of the lifting frame (502) opposite to the lifting screw (501), the length of the limiting slide bar (501) matches that of the lifting screw (501), and is fixed on the support frame (2), and a sliding hole is correspondingly provided on the lifting frame (502), and is slidably connected to the slide bar (510) through the sliding hole.

6. A bored pile construction device according to claim 1 or 2, characterized in that: The slag recovery plate (201) is an inclined plate with a lower side connected to the slag conveyor belt (304), and a retaining plate (203) is provided on the lower side edge of the slag recovery plate (201), and a slag outlet (204) is provided at the connection position of the retaining plate (203) corresponding to the slag conveyor belt (304), and a slag inlet is provided at the position where the soil storage box (103) is connected to the slag conveyor belt (304), one end of the slag conveyor belt (304) is connected to the slag outlet (204), and the other end extends into the soil storage box (103) through the slag inlet; the inner diameter of the digging opening (202) is greater than the diameter of the spiral cutting cutter (401) or matches the spiral cutting cutter (401), and under the action of the lifting device (5), the spiral digging mechanism moves up and down along the digging opening (202) to realize the construction of the pile hole.

7. A bored pile construction device according to claim 1 or 2, characterized in that: The belt transmission assembly comprises a first rotating shaft (302) and a second rotating shaft (306) which are installed on the slag conveyor belt (304) and are transmission-connected to the slag conveyor belt (304); the first rotating shaft (302) is connected to the output end of a third driving motor (301), and the slag conveyor belt (304) is driven by the third driving motor (301) to work; the third driving motor (301) is installed on a soil storage box (103); support plates (303) are symmetrically distributed on both sides of the slag conveyor belt (304); the two ends of the two support plates (303) are respectively connected to the first rotating shaft (302) and the second rotating shaft (306); a fixed plate (305) is rotatably installed on the support plate (303), and the fixed plate (305) is connected to the vehicle frame (101).

8. A bored pile construction device according to claim 1 or 2, characterized in that: The cleaning plate (412) is provided with a cleaning sheet (413), and the cleaning sheet (413) is provided with two sheets, which are symmetrically installed on one side of the cleaning plate (412) adjacent to the spiral rod (402) and perpendicular to the cleaning plate (412), and the two cleaning sheets (413) and the upper surface of the spiral cutter (401) are in contact with or perpendicular to each other.

9. A construction method for a bored pile construction device according to any one of claims 1 to 8, characterized in that: The specific steps are as follows: Step 1: Determine, control and check the axis position of each pile; through surveying, establish 6 permanent control points in the foundation pit, arranged in the shape of an "I", and use this orthogonal axis control network to determine, control and check the axis position of each pile; Step 2: Preparation before construction: measure the pile position on site and mark the pile position, then clean up the stones and obstacles around the pile position; Step 3: Move the bored pile construction device of the present invention to the first pile position mark point by a trailer, and flip the support frame on which the excavation device is installed downward by a flip mechanism so that the digging opening at the bottom of the support frame faces the marked pile position; Step 4: Before digging, the cleaning plate is located at the top edge of the spiral cutter. At this time, the electric push rod is started, and the limit pin is driven by the electric push rod to get into the cleaning plate. The secondary fine digging mechanism is locked, and the primary digging of the pile hole begins; Step 5: Start the first drive motor and the second drive motor at the same time, the first drive motor drives the excavation device to move downward along the support frame, and the second drive motor drives the spiral rod and the spiral cutter to rotate to perform pile hole excavation; during the excavation process, the slag is brought to the slag recovery plate at the bottom of the support frame by the rotation of the spiral cutter, and the slag is transported to the soil storage box by the transport device; Step 6: When the first-level rough excavation reaches the bottom of the pile hole, the electric push rod is controlled to drive the limit pin to move out of the limit slot on the cleaning plate, and the second-level fine excavation mechanism is unlocked; the first driving mechanism is stopped, and the spiral rod and the spiral cutter stay in the initially formed pile hole, and the second driving motor continues to work, the spiral stem and the spiral cutter rotate in the formed pile hole, and the cleaning plate contacts the wall of the pile hole. Under the action of friction, the cleaning plate moves downward along the spiral rod to smooth the wall of the pile hole; the slag excavated from the second-level fine excavation is brought to the slag recovery plate at the bottom of the support frame by the rotation of the spiral cutter, and the slag is transported to the soil storage box by the transportation device; Step 7: After the secondary excavation is completed, the first driving mechanism is turned on, and the first driving mechanism drives the lifting frame to move upward. At the same time, the second driving motor continues to work, driving the spiral rod, spiral cutter and cleaning plate to continue to rotate, and the hole wall can be smoothed and compacted again. After the excavation device is completely raised to the support frame, the excavation work is completed; Step 8: After the excavation is completed, the support frame is flipped upward 90 degrees through the flipping mechanism so that it can be placed squarely on the frame. It can then be moved to the next pile position mark point by a trailer to carry out the excavation of the next hole pile.

10. The construction method of the bored pile construction device according to claim 9, characterized in that: The specific steps are as follows: In the step 6, during the secondary fine excavation, the cleaning sheet on the cleaning plate moves along the surface of the spiral cutter to clean the residual debris on the spiral cutter.

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