An installation and stabilization structure for large-diameter PHC pipe piles

Abstract

The present invention discloses an installation and stabilization structure for large-diameter PHC pipe piles in pile foundation construction technology, which includes a mechanism base and a fixing ring. A guiding platform is installed directly above the fixing ring. A funnel-shaped guiding cavity is provided on the central axis of the guiding platform. A fluctuating ring mechanism is arranged on the top surface of the guiding platform. A plurality of downward pressing block mechanisms are distributed circumferentially on the inner wall of the guiding cavity. A stepping motor is installed on the top of the downward pressing block mechanism and connected to a rotating clamp. A plurality of fixing clamps are installed at the bottom end of the guiding platform through a clamping mechanism. Through the guiding cavity, the large-diameter PHC pipe pile can be pre-guided, facilitating the large-diameter PHC pipe pile being hoisted to slowly change from an unstable state to an approximately vertical state. The fluctuating ring mechanism and the downward pressing block mechanism can effectively prevent the problem that the large-diameter PHC pipe pile cannot fall due to excessive inclination, realizing the function of vertical straightening.

Description

Technical Field

[0001] The present invention relates to the technical field of pile foundation construction technology, and specifically to an installation and stabilization structure for large-diameter PHC pipe piles. Background Technique

[0002] PHC pipe pile: Fully known as prestressed high-strength concrete pipe pile, that is, prestressed high-strength concrete pipe pile, is a hollow cylindrical concrete precast member made by the pre-tensioned centrifugal forming process and steam cured at about 180 °C under 10 atmospheric pressures. Compared with traditional pipe piles, large-diameter PHC pipe piles have the advantages of intuitive quality, stable structure, easy assurance of pile-forming process quality, environmental protection, etc., and have become the main force and development direction of building piles at present.

[0003] During the installation process of traditional large-diameter PHC pipe piles, the pipe piles are generally lifted by a hoisting method and offset to directly above the pile hole, and then multiple workers are required to manually straighten the bottom of the pile. After alignment, it is slowly sunk into the pile hole. This process requires a large amount of manpower and material resources, and the installation process is affected by many factors. When the pipe pile stops near the pile hole, due to the huge inertia, the pipe pile will shake due to the stop action. The self-weight of large-diameter pipe piles is relatively large, and it is easy to cause collision accidents when personnel directly go up to straighten it during the shaking process. Therefore, in order to reduce risks, it is necessary to wait for the pipe pile to stop stably before manually straightening it. However, due to its huge inertia, it takes a long time for its swing amplitude to be reduced to a safe range.

[0004] Therefore, in view of the above problems, we need an installation and stabilization structure for large-diameter PHC pipe piles that can improve construction safety and construction efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide an installation and stabilization structure for large-diameter PHC pipe piles to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An installation and stabilization structure for large-diameter PHC pipe piles, including a mechanism base and a fixing ring for defining the vertical state of the pipe pile. A plurality of lifting mechanisms for lifting the fixing ring are installed around the top of the mechanism base. A guiding platform is installed directly above the fixing ring. A funnel-shaped guiding cavity is provided along the central axis of the guiding platform. A plurality of undulating ring mechanisms for lifting the pipe pile upward are installed along the edge of the opening of the guiding cavity on the top surface of the guiding platform. Limiting plates are installed on both sides above the undulating ring mechanism through limiting movement mechanisms respectively. A plurality of pressing block mechanisms for pressing down the bottom end of the pipe pile are installed circumferentially and distributively on the inner wall of the guiding cavity. A stepping motor is installed on the top of the pressing block mechanism and is connected to a rotating clamp. A plurality of fixing clamps are installed at the bottom end of the guiding platform through a clamping mechanism.

[0007] As a further solution of the present invention, the undulating ring mechanism includes a plurality of undulating rings arranged circumferentially. The undulating rings are vertically and slidably installed on the top end face of the guiding cavity, and an electric lifting cylinder for jacking up the undulating rings is hiddenly installed on the inner wall of the guiding cavity.

[0008] As a further solution of the present invention, the limit moving mechanism includes a chute. An arc-shaped chute is formed on the top surface of the undulating ring. An arc-shaped inner groove is formed at the bottom of the chute. Motors are respectively arranged on both sides inside the chute. The bottom of the motor is slidably clamped in the inner groove. A gear is vertically and fixedly installed on the motor shaft of the motor. An arc-shaped rack for meshing with the gear is installed on the inner side wall of the chute. A limit plate shaft is fixedly installed at the bottom of the limit plate. The bottom end of the limit plate shaft is rotatably installed at the center of the top end of the gear. The shaft wall of the limit plate shaft is slidably clamped on the inner wall of the chute and cannot rotate.

[0009] As a further solution of the present invention, the pressing block mechanism includes a plurality of pressing blocks. The plurality of pressing blocks are evenly distributed and installed on the inner surface of the guiding cavity. A receiving cavity for receiving the pressing blocks is formed on the inner wall of the guiding cavity. The bottom end of the pressing block is rotatably installed at the inner bottom of the receiving cavity. An electric telescopic cylinder for pushing the top of the pressing block outwards is fixedly installed at the inner top of the receiving cavity.

[0010] As a further solution of the present invention, the rotating clamp is rotatably installed on the top of the pressing block through a rotating shaft, and a stepping motor for driving the rotating shaft to rotate is installed on the top of the pressing block.

[0011] As a further solution of the present invention, the clamping mechanism includes a telescopic rod. A connecting ring is installed at the bottom of the guiding platform. A plurality of connecting boxes are installed around the connecting ring. The lower end of each connecting box is connected to the telescopic rod. The telescopic end of the telescopic rod is connected to a fixed clamp, and the fixed clamp faces the central axis of the guiding cavity.

[0012] As a further solution of the present invention, the lifting mechanism includes a plurality of support legs vertically fixed on the mechanism base. Each support leg is fixedly connected to a telescopic column. The telescopic column includes a single-column hydraulic press. The sliding ring is sleeved on the telescopic column. The inner side end of the sliding ring is connected to the fixed ring. The fixed ring is composed of two half rings. A connecting lock is installed at the butt joint position of the half rings, and a bolt is installed on the connecting lock.

[0013] As a further solution of the present invention, an opening for a large-diameter PHC pipe pile to pass through is formed at the center of the mechanism base. A plurality of positioning holes for the horizontal installation of the mechanism base are circumferentially distributed on the top surface of the mechanism base, and adjusting screws are threadedly inserted into the positioning holes.

[0014] As a further solution of the present invention, pressure sensors are installed on the surfaces of the pressing block mechanism and the undulating ring mechanism, a position sensor is provided at the fixed clamp, and a controller for driving the pressing block mechanism, the undulating ring mechanism, and the clamping mechanism to act is provided on one side of the guiding platform. The signal output ends of the pressure sensor and the position sensor are electrically connected to the signal input end of the controller.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. Through the guiding cavity, the present invention can pre-guide large-diameter PHC pipe piles, and can slowly guide the large-diameter PHC pipe piles that are convenient for hoisting from an unstable state to a state tending to be vertical. The undulating ring mechanism equipped at the opening of the guiding cavity and the pressing block mechanism arranged on the inner wall can effectively prevent the problem that the large-diameter PHC pipe pile cannot fall due to excessive inclination, realizing the function of vertical straightening, ensuring the smooth falling effect of the large-diameter PHC pipe pile. The set fixing ring can accurately clamp and vertically drop large-diameter PHC pipe piles of different sizes. The multiple set fixing clamps can cooperate with the guiding cavity and the fixing ring respectively up and down, playing the role of ensuring its continuous smooth falling and accurately docking with the fixing ring;

[0017] 2. The set limit moving mechanism of the present invention can drive the limit plates on both sides to achieve the effect of approaching or separating from each other. Limit plates that can be individually controlled to move are installed on both sides of each undulating ring, and the positions of the limit plates on both sides can be flexibly adjusted according to the leaning position of the large-diameter PHC pipe pile, so as to realize the clamping and limiting action at any leaning position of the large-diameter PHC pipe pile;

[0018] 3. In the initial state, the pressing block set in the present invention is completely received in the inner wall of the guiding cavity, ensuring the smoothness of the inner wall of the guiding cavity. When it needs to be ejected, the pressing block is driven to rotate and eject in an inverting form. This ejection method can not only push the large-diameter PHC pipe pile inward, but also the pressing block has a pressing action, so as to cooperate with the rotating clamp to achieve a certain pressing action and prevent the bottom end from tilting up during the process of straightening the large-diameter PHC pipe pile;

[0019] 4. The set pressure sensor can directly transmit the position where the large-diameter PHC pipe pile presses on the guiding cavity to the controller. The controller can quickly determine the position according to the input pressure signal, and then drive the pressing block mechanism and the undulating ring mechanism at the alignment position to act, without manual operation. The set position sensor can transmit a signal to the controller after the large-diameter PHC pipe pile passes through the fixed clamp, and the controller can control the clamping mechanism to act to complete the automatic clamping action of multiple fixing frames. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 For the Figure 1 structural schematic diagram in the bottom direction.

[0022] Figure 3 For the structural schematic diagram in the top-down view direction of the guiding cavity.

[0023] Figure 4 For the structural schematic diagram of the limiting plate and the undulating ring.

[0024] Figure 5 For the structural schematic diagram of the horizontal cross-section of the sliding groove.

[0025] Figure 6 For the structural schematic diagram of the pressing block.

[0026] Figure 7 For the structural schematic diagram of the lifting mechanism and the clamping mechanism.

[0027] Figure 8 For the structural schematic diagram of the fixing ring.

[0028] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0029] Base 1, positioning hole 10, support leg 11, telescopic column 12, telescopic rod 13, connection box 14, fixing clamp 15, motor compartment 16, connecting ring 17, fixing ring 2, connection lock 20, bolt 21, sliding ring 22, guiding cavity 3, undulating ring 30, sliding groove 31, limiting plate 32, limiting plate shaft 33, gear 34, motor 35, inner groove 36, rack 37, pressing block 4, stepper motor 40, rotating shaft 41, rotating clamp 42. Specific implementation mode

[0030] Please refer to Figures 1-8 , the present invention provides a technical solution: an installation and stabilization structure for large-diameter PHC pipe piles, including a mechanism base 1 and a fixing ring 2 for limiting the vertical state of the pipe pile. A plurality of lifting mechanisms for lifting the fixing ring 2 are installed around the top of the mechanism base 1. A guiding platform is installed directly above the fixing ring 2. A funnel-shaped guiding cavity 3 is provided along the central axis of the top surface of the guiding platform. A plurality of undulating ring mechanisms for lifting the pipe pile upward are installed along the opening edge of the guiding cavity 3 on the top surface of the guiding platform. Limiting plates 32 are respectively installed on both sides above the undulating ring mechanism through a limiting movement mechanism. A plurality of pressing block mechanisms for pressing down the bottom end of the pipe pile are installed in a circumferential distribution on the inner wall of the guiding cavity 3. A stepper motor is installed on the top of the pressing block mechanism and connected to a rotating clamp 42. A plurality of fixing clamps 15 are installed at the bottom end of the guiding platform through a clamping mechanism.

[0031] During operation, the mechanism base 1 is fixed on the ground, the undulating ring mechanism is controlled to retract the undulating ring above the guide cavity 3 downward, and the downward pressing block mechanism is controlled to be in the retracted state so that the surface is parallel to the inner and outer surfaces of the guide cavity 3, and the large-diameter PHC pipe pile is moved to the uppermost part of the mechanism and slowly descends into the guide cavity 3. When the large-diameter PHC pipe pile falls and tilts, the bottom end of the large-diameter PHC pipe pile abuts against the inner wall of the guide cavity 3, and the pipe wall at the bottom of the large-diameter PHC pipe pile leans against the top opening edge of the guide cavity 3. At this time, the large-diameter PHC pipe pile cannot slide downward by its own weight, and the large-diameter PHC pipe pile needs to be straightened externally. Therefore, the present invention provides an undulating ring 30 for lifting its pipe wall and a downward pressing block mechanism for pushing the end of the large-diameter PHC pipe pile abutting against the inner wall of the guide cavity 3 toward the axial centerline position of the guide cavity 30 at the top opening edge position of the guide cavity 3. When the bottom of the large-diameter PHC pipe pile is tilted and stuck in the guide cavity 30, the undulating ring mechanism is controlled to extend and be stuck by the large-diameter PHC pipe pile The pipe wall leans against the undulating ring 30 on one side, and the movement of the corresponding limiting plate 32 above the undulating mechanism is controlled by the limiting movement mechanism, so that the limiting plates 32 on both sides can limit the position of the large-diameter PHC pipe pile, prevent the large-diameter PHC pipe pile from secondary lateral sliding during the straightening process, and control the lower pressing block mechanism to extend in the guide cavity 3, so as to push the bottom end of the large-diameter PHC pipe pile inwardly toward the axial centerline direction of the guide cavity 3. In order to further prevent the large-diameter PHC pipe pile from twisting or lateral movement at the bottom end, an additional rotating clamp 42 that can press down and limit from the top is provided here to cooperate with the inward pushing action of the lower pressing block mechanism. When working, the rotating clamp 42 above the lower pressing block mechanism leaves the inside of the guide cavity 3, and the rotating clamp 42 flips down from the top and rests on the upper outer wall of the bottom end of the large-diameter PHC pipe pile, thereby environmentally clamping the bottom end of the large-diameter PHC pipe pile, which can ensure that when the lower pressing block mechanism pushes the large-diameter PHC pipe pile inwardly, the bottom of the large-diameter PHC pipe pile will not have the problem of sliding and dislocation.

[0032] Among them, the fixed ring 2 is mainly used to be sleeved on the outer wall of the large-diameter PHC pile for accurate positioning during the pile driving process, and the height of the fixed ring 2 can be controlled by the lifting mechanism.

[0033] Among them, the fixed clamp 15 can be clamped toward the inner circle through the supporting mechanism. When the large-diameter PHC pile passes through the guiding cavity 3, in order to ensure the stability of its continued fall and to ensure that it can be accurately docked with the fixing ring 2, after the bottom end of the large-diameter PHC pile passes over the fixed clamp 15, the supporting mechanism drives multiple fixed clamps 15 to clamp the large-diameter PHC pile inward, thereby ensuring the vertical and accurate fall of the large-diameter PHC pile.

[0034] Thus, through the guiding cavity 3, the present invention can pre-guide large-diameter PHC pipe piles, facilitating the slow guiding of large-diameter PHC pipe piles in an unstable state to a state approaching verticality. The undulating ring mechanism provided at the opening of the guiding cavity 3 and the downward pressing block mechanism provided on the inner wall can effectively prevent the problem that large-diameter PHC pipe piles cannot fall due to excessive inclination, realizing the function of vertical straightening, ensuring the smooth falling effect of large-diameter PHC pipe piles. The provided fixing ring 2 can accurately clamp and vertically drop large-diameter PHC pipe piles of different sizes. The provided multiple fixing clips 15 can cooperate with the guiding cavity 3 and the fixing ring 2 respectively up and down, playing the role of ensuring their continuous smooth falling and accurately docking with the fixing ring 2.

[0035] As a further solution of the present invention, the undulating ring mechanism includes a plurality of undulating rings 30 distributed circumferentially. The undulating rings 30 are vertically and slidably installed on the top end face of the guiding cavity 3, and an electric lifting cylinder for jacking up the undulating rings 30 is hiddenly installed on the inner wall of the guiding cavity 3.

[0036] During operation, when it is found that the large-diameter PHC pipe pile is inclined and cannot slide down, the electric lifting cylinder of the undulating ring 30 at the position pressed by the large-diameter PHC pipe pile is driven. The electric lifting cylinder drives the undulating ring 30 to jack up, so that the large-diameter PHC pipe pile can be lifted upward against the pipe wall at the opening edge of the guiding cavity 3 to complete the lifting action.

[0037] As a further solution of the present invention, the limit moving mechanism includes a chute 31. An arc-shaped chute 31 is formed on the top surface of the undulating ring 30. An arc-shaped inner groove 36 is formed at the bottom of the chute 31. Motors 35 are respectively arranged on both sides inside the chute 31. The bottom of the motor 35 is slidably clamped in the inner groove 36. A gear 34 is vertically and fixedly installed on the motor shaft of the motor 35. An arc-shaped rack 37 for meshing with the gear 34 is installed on the inner side wall of the chute 31. A limit plate shaft 33 is fixedly installed at the bottom of the limit plate 32. The bottom end of the limit plate shaft 33 is rotatably installed at the center of the top end of the gear 34, and the shaft wall of the limit plate shaft 33 is slidably clamped on the inner wall of the chute 31 and cannot rotate.

[0038] During operation, when it is necessary to limit and clamp both sides of a large-diameter PHC pipe pile, the drive motor 35 operates. The motor shaft of the motor 35 drives the gear 34 to rotate. Since the gear 34 meshes with the rack 37, and the rack 37 is fixed to the inner wall of the chute 31, and the motor 35 as a whole is slidably clamped on the inner groove 36, when the gear 34 meshes and rotates with the rack 37, the motor 35 as a whole will slide along the inner groove 36. Also, since the bottom of the limiting plate 32 is connected to the gear 34 through the limiting plate shaft 33, when the motor 35 drives the gear 34 to slide as a whole, the gear 34 will also drive the limiting plate 32 to slide along the arc-shaped chute 31. Here, the limitation of the limiting plate shaft 33 mainly prevents the gear 34 from driving the limiting plate 32 to rotate. Therefore, the bottom of the limiting plate shaft 33 is rotatably connected to the gear 34, and the limiting plate shaft 33 is clamped by the inner wall of the chute 31, and the limiting plate shaft 33 cannot rotate by itself.

[0039] Thus, the limiting and moving mechanism provided by the present invention can drive the limiting plates 32 on both sides to achieve the effect of approaching or moving away from each other. Limiting plates 32 that can be individually controlled for movement are installed on both sides of each undulating ring 30, and the positions of the limiting plates 32 on both sides can be flexibly adjusted according to the leaning position of the large-diameter PHC pipe pile, so as to realize the clamping and limiting action at any leaning position of the large-diameter PHC pipe pile.

[0040] As a further solution of the present invention, the pressing block mechanism includes a plurality of pressing blocks 4. The plurality of pressing blocks 4 are evenly distributed and installed on the inner surface of the guiding cavity 3. A receiving cavity for receiving the pressing blocks 4 is provided on the inner wall of the guiding cavity 3. The bottom end of the pressing block 4 is rotatably installed at the inner bottom of the receiving cavity, and an electric telescopic cylinder for pushing the top of the pressing block 4 outwards is fixedly installed at the inner top of the receiving cavity.

[0041] During operation, when the large-diameter PHC pipe pile is tilted and stuck and cannot slide, according to the position where the bottom end of the large-diameter PHC pipe pile abuts against the inner wall of the guiding cavity 3, the corresponding electric telescopic cylinder is adjusted. The electric telescopic cylinder pushes the corresponding pressing block 4 outwards. Here, the pressing block 4 set is completely received in the inner wall of the guiding cavity 3 in the initial state to ensure the smoothness of the inner wall of the guiding cavity 3. When it is necessary to push out, the pressing block 4 is then driven to rotate and push out in an inverting form. This pushing-out method can not only push the large-diameter PHC pipe pile inwards, but also the pressing block 4 has a pressing action, so as to cooperate with the rotary clamp 42 to achieve a certain pressing action and prevent the bottom end of the large-diameter PHC pipe pile from tilting up during the process of righting the large-diameter PHC pipe pile.

[0042] As a further solution of the present invention, the rotary clamp 42 is rotatably installed on the top of the pressing block 4 through a rotating shaft 41, and a stepping motor 40 for driving the rotating shaft 41 to rotate is installed on the top of the pressing block 4.

[0043] During operation, when the large-diameter PHC pipe pile falls and tilts, the bottom of the pipe pile touches the inner surface of the guiding cavity 3, and the phenomenon of pipe pile sliding may occur. At this time, while the pressing block 4 extends, the power supply of the top stepping motor 40 is controlled. The stepping motor 40 controls the rotation of the rotating shaft 41, and the rotating shaft 41 drives the rotating clamp 42 to leave the top of the pressing block 4 and quickly rotate a certain angle to clamp the outer wall of the large-diameter PHC pipe pile, follow the pressing block 4 to press down and stabilize the position of the pipe pile to keep it stationary.

[0044] As a further solution of the present invention, the clamping mechanism includes a telescopic rod 13. A connecting ring 17 is installed at the bottom of the guiding platform. A plurality of connecting boxes 14 are installed around the connecting ring 17. The lower end of each connecting box 14 is connected to the telescopic rod 13, and the telescopic end of the telescopic rod 13 is connected to a fixed clamp 15, and the fixed clamp 15 faces the central axis of the guiding cavity 3.

[0045] During operation, the provided connecting ring 17 and connecting boxes 14 are mainly used to install and support the guiding platform. After the large-diameter PHC pipe pile enters the connecting ring 17, the telescopic rod 13 is controlled to start extending forward, and the fixed clamp 15 at the front end of the telescopic rod 13 follows and extends to approach the outer wall of the large-diameter PHC pipe pile. The fixed clamp 15 contacts the large-diameter PHC pipe pile to ensure the vertical downward direction of the pipe pile.

[0046] As a further solution of the present invention, the lifting mechanism includes a plurality of support legs 11 vertically fixed on the mechanism base 1. Each support leg 11 is fixedly connected to a telescopic column 12. The telescopic column 12 includes a single-column hydraulic press. A sliding ring 22 is sleeved on the telescopic column 12. The inner end of the sliding ring 22 is connected to a fixed ring 2. The fixed ring 2 is composed of two half rings. A connecting lock 20 is installed at the docking position of the half rings, and a bolt 21 is installed on the connecting lock 20.

[0047] During operation, the fixed ring 2 is sleeved on the telescopic column 12 at the corresponding position by a plurality of sliding rings 22. The bolts 21 on the connecting locks 20 on both sides of the fixed ring 2 are manually adjusted, and the clamping degree of the fixed ring 2 is reasonably adjusted according to the diameter of the large-diameter PHC pipe pile. The single-column hydraulic press in the telescopic column 12 is controlled to drive, and the sliding ring 22 moves upward, driving the fixed ring 2 to move upward, thereby changing the clamping position of the fixed ring 2.

[0048] As a further solution of the present invention, an opening for the large-diameter PHC pipe pile to pass through is provided in the center of the mechanism base 1. A plurality of positioning holes 10 for the horizontal installation of the mechanism base 1 are distributed circumferentially on the top surface of the mechanism base 1, and adjusting screws are threadedly inserted into the positioning holes 10.

[0049] During operation, the mechanism base 1 is placed on the construction ground. When the mechanism base 1 is not horizontal, the downward extension length of the adjusting screws at the corresponding positions is adjusted according to its inclination state, so that the mechanism base 1 can be quickly horizontally installed on the uneven construction ground.

[0050] As a further solution of the present invention, pressure sensors are installed on the surfaces of the lower pressing block mechanism and the undulating ring mechanism, a position sensor is provided at one position of the fixed clamp 15, and a controller 16 for driving the lower pressing block mechanism, the undulating ring mechanism, and the clamping mechanism to act is provided on one side of the guiding table. The signal output ends of the pressure sensor and the position sensor are electrically connected to the signal input end of the controller 16.

[0051] During operation, when the large-diameter PHC pipe pile is inclined and jammed and cannot slide, the specific jamming position is not convenient for personnel to observe at the bottom. The pressure sensor provided here can directly transmit the position where the large-diameter PHC pipe pile presses on the guiding cavity 3 to the controller 16. The controller 16 can quickly determine the position according to the input pressure signal, so as to drive the pressing block mechanism and the undulating ring mechanism at the alignment position to act, without manual operation. The provided position sensor can transmit a signal to the controller 16 after the large-diameter PHC pipe pile passes through the fixed clamp 15, and the controller 16 can control the clamping mechanism to act to complete the automatic clamping action of multiple fixed frames 15.

Claims

1. An installation and stabilization structure for large-diameter PHC pipe piles, comprising a mechanism base (1) and a fixing ring (2) for defining the vertical state of the pipe piles, characterized in that, A plurality of lifting mechanisms for lifting the fixing ring (2) are installed around the top of the mechanism base (1). A guiding platform is installed directly above the fixing ring (2). A funnel-shaped guiding cavity (3) is provided along the central axis of the guiding platform. A undulating ring mechanism for lifting the pipe pile upward is installed along the opening edge of the guiding cavity (3) on the top surface of the guiding platform. The undulating ring mechanism includes a plurality of undulating rings (30) arranged in a circumferential distribution. On both sides above the undulating ring (30), a limiting plate (32) is installed through a limiting movement mechanism. A plurality of pressing block mechanisms for pressing down the bottom end of the pipe pile are installed in a circumferential distribution on the inner wall of the guiding cavity (3). A stepping motor is installed on the top of the pressing block mechanism and is connected to a rotating clamp (42). A plurality of fixing clamps (15) are installed at the bottom end of the guiding platform through a clamping mechanism.

2. The installation and stabilization structure of a large-diameter PHC pipe pile according to claim 1, characterized in that: The undulating ring (30) is vertically and slidably installed on the top end face of the guiding cavity (3). An electric lifting cylinder for lifting the undulating ring (30) is hiddenly installed on the inner wall of the guiding cavity (3).

3. The installation and stabilization structure of a large-diameter PHC pipe pile according to claim 2, characterized in that: The limiting movement mechanism includes a chute (31). An arc-shaped chute (31) is provided on the top surface of the undulating ring (30). An arc-shaped inner groove (36) is provided at the bottom of the chute (31). Motors (35) are respectively arranged on both sides inside the chute (31). The bottom of the motor (35) is slidably clamped in the inner groove (36). A gear (34) is vertically and fixedly installed on the motor shaft of the motor (35). An arc-shaped rack (37) for meshing with the gear (34) is installed on the inner side wall of the chute (31). A limiting plate shaft (33) is fixedly installed at the bottom of the limiting plate (32). The bottom end of the limiting plate shaft (33) is rotatably installed at the center of the top end of the gear (34). The shaft wall of the limiting plate shaft (33) is slidably clamped on the inner wall of the chute (31) and cannot rotate.

4. The installation and stability structure of a large-diameter PHC pipe pile according to claim 1, characterized in that: The pressing block mechanism includes a pressing block (4). The pressing blocks (4) are evenly distributed and installed on the inner surface of the guiding cavity (3). A storage cavity for storing the pressing block (4) is provided on the inner wall of the guiding cavity (3). The bottom end of the pressing block (4) is rotatably installed at the inner bottom of the storage cavity. An electric telescopic cylinder for pushing the top of the pressing block (4) outwards is fixedly installed at the inner top of the storage cavity.

5. The installation and stability structure of a large-diameter PHC pipe pile according to claim 4, characterized in that: The rotating clamp (42) is rotatably installed on the top of the pressing block (4) through a rotating shaft (41). A stepping motor (40) for driving the rotating shaft (41) to rotate is installed on the top of the pressing block (4).

6. The installation and stability structure of a large-diameter PHC pipe pile according to claim 1, characterized in that: The clamping mechanism includes a telescopic rod (13). A connecting ring (17) is installed at the bottom of the guiding platform. A plurality of connecting boxes (14) are installed around the connecting ring (17). The lower end of each connecting box (14) is connected to the telescopic rod (13). The telescopic end of the telescopic rod (13) is connected to a fixing clamp (15). The fixing clamp (15) faces the central axis of the guiding cavity (3).

7. The installation and stability structure of a large-diameter PHC pipe pile according to claim 1, characterized in that: The lifting mechanism includes a plurality of support legs (11) vertically fixed to the mechanism base (1). Each support leg (11) is fixedly connected to a telescopic column (12). The telescopic column (12) includes a single-column hydraulic press. A sliding ring (22) is sleeved on the telescopic column (12). The inner end of the sliding ring (22) is connected to the fixing ring (2). The fixing ring (2) is composed of two semi-rings. A connecting lock (20) is installed at the docking position of the semi-rings. A bolt (21) is installed on the connecting lock (20).

8. The installation and stability structure of a large-diameter PHC pipe pile according to claim 1, characterized in that: An opening for a large-diameter PHC pipe pile to pass through is provided at the center of the mechanism base (1). A plurality of positioning holes (10) for the horizontal installation of the mechanism base (1) are distributed circumferentially on the top surface of the mechanism base (1). Adjusting screws are threadedly inserted into the positioning holes (10).

9. The installation and stabilization structure of a large-diameter PHC pipe pile according to claim 1, characterized in that: Pressure sensors are installed on the surfaces of the lower pressing block mechanism and the undulating ring mechanism. A position sensor is provided at one place of the fixing clamp (15). A controller (16) for driving the lower pressing block mechanism, the undulating ring mechanism, and the clamping mechanism to act is provided on one side of the guiding platform. The signal output ends of the pressure sensor and the position sensor are electrically connected to the signal input end of the controller (16).

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