PHC pipe pile construction device and construction method

Abstract

The invention belongs to the technical field of PHC pipe piles, and particularly relates to a PHC pipe pile construction device and a construction method.The PHC pipe pile construction device comprises a static pressure machine frame body, and a static pressure component is arranged on the upper surface of the static pressure machine frame body and comprises a switching device and a static pressure device. According to the PHC pipe pile construction device and method, by arranging the static pressure device, the PHC pipe pile construction device and method can adapt to PHC pipe piles of various diameters, the practicability is improved, deflection can be conducted through the floating block, so that the purposes of attaching the PHC surface, increasing the contact area and dispersing stress are achieved, the floating block is added to be attached to the PHC pipe pile through elastic cooperation of a connecting spring, a reset spring and a sealing air bag, and the construction efficiency is improved. According to the PHC pipe pile construction device, the clamping force is increased, meanwhile, the floating block can deflect and move, so that the position is changed, the PHC pipe piles with different diameters can be conveniently adapted, and the technical problems that an existing PHC pipe pile construction device is high in pile body surface damage risk, rapid in jaw abrasion, high in maintenance cost and poor in adaptability to the PHC pipe piles with different diameters are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of PHC pipe pile, and particularly relates to a PHC pipe pile construction device and a construction method. BACKGROUND

[0002] PHC pipe pile (prestressed high-strength concrete pipe pile) is a kind of high-strength concrete precast pile made by using the prestressed technology of pretensioning method and the centrifugal forming method, has the advantages of high bearing capacity, fast construction, stable quality, etc., and is widely used in the foundation construction of buildings, bridges, ports and other projects.

[0003] The existing static pressure machine clamping pile device is easy to cause damage to the surface of the pile (especially the PHC pipe pile), the clamping force depends on a large amount of hydraulic energy, the jaw wears out quickly, and the rigid jaw cannot fit the surface of the PHC pipe pile for different diameters of the PHC pipe pile, thereby reducing the stress area, easily causing damage to the surface of the PHC pipe pile, and affecting the static pressure of the PHC, and the pile device cannot continuously perform static pressure, and after the pressing is completed, the next pressing can be performed after resetting, and when the insertion size of the PHC pipe pile is short, the positioning is not accurate, and the efficiency is low. SUMMARY

[0004] In view of the technical problems of high risk of damage to the surface of the pile caused by the existing PHC pipe pile construction device, fast wear of the jaw, high maintenance cost, poor adaptability to different diameters of the PHC pipe pile, inability to continuously perform static pressure, and low efficiency, the present application provides a PHC pipe pile construction device and a construction method.

[0005] The PHC pipe pile construction device provided by the present application comprises a static pressure machine frame body, a static pressure component is arranged on the upper surface of the static pressure machine frame body, and the static pressure component comprises a switching device and a static pressure device.

[0006] The switching device is located on the upper surface of the static pressure machine frame body and switches the static pressure device, the switching device comprises a switching frame, and the movement of the switching frame drives the static pressure device to move.

[0007] The static pressure device is located on the outer surface of the switching frame and performs static pressure work on the PHC pipe pile, the static pressure device comprises a floating block, and a plurality of floating blocks clamp the PHC pipe pile to be constructed.

[0008] Preferably, the switching device further comprises a support frame, the support frame is fixedly installed on the upper surface of the static pressure machine frame body, a moving groove is formed in the outer surface of the support frame, a guide rail is fixedly installed on the outer surface of the support frame, a sliding block is slidably inserted into the outer surface of the guide rail, and the outer surface of the sliding block is slidably inserted into the outer surface of the switching frame.

[0009] Preferably, the outer surface of the switching frame is rotationally connected with a roller, and the outer surface of the roller is slidingly inserted with the inner wall of the moving groove.

[0010] Preferably, the outer surface of the supporting frame is fixedly installed with an adjusting hydraulic cylinder, and the piston rod of the adjusting hydraulic cylinder is fixedly installed with a stopper, and one end of the stopper is slidingly inserted with the inner wall of the moving groove.

[0011] Preferably, the outer surface of the static pressure frame body is fixedly installed with a static pressure multi-stage hydraulic cylinder, and one end of the piston rod of the multi-stage hydraulic cylinder is fixedly installed with the outer surface of the switching frame.

[0012] Preferably, the static pressure device further comprises a clamping hydraulic cylinder, and the clamping hydraulic cylinder is fixedly installed on the outer surface of the switching frame, and one end of the piston rod of the clamping hydraulic cylinder is fixedly installed with a mounting plate.

[0013] Preferably, the outer surface of the mounting plate is fixedly installed with a sealing sleeve, the inner wall of the sealing sleeve is slidingly inserted with an adjusting frame, the outer surface of the adjusting frame is fixedly installed with a connecting spring, and one end of the connecting spring is fixedly installed with the outer surface of the sealing sleeve.

[0014] Preferably, the outer surface of the adjusting frame is hinged with the outer surface of the floating block through a pin shaft, the outer surface of the floating block is fixedly installed with a wear-resistant layer, and the surface of the floating block is fixedly installed with a pressure sensor.

[0015] Preferably, the outer surface of the sealing sleeve is fixedly communicated with a connecting pipeline, the outer surface of the mounting plate is fixedly installed with a protective shell, the inner wall of the protective shell is fixedly installed with a sealing air bag, one end of the connecting pipeline is fixedly communicated with the outer surface of the sealing air bag, the inner wall of the protective shell is slidingly inserted with a pressing plate, the outer surface of the pressing plate is fixedly installed with a return spring, and the outer surface of the pressing plate is in contact with the outer surface of the sealing air bag.

[0016] The construction method of the PHC pipe pile construction device provided by the application comprises the following steps:

[0017] S1: site preparation: clean and level the site, ensure that the static pressure frame body can walk and work stably, handle underground obstacles, set up drainage ditches, ensure that the site does not accumulate water, and perform site hardening, especially for soft soil foundation, to meet the grounding pressure and stability requirements of the static pressure frame body;

[0018] S2: measurement and line laying: according to design drawings, accurately measure and lay the building axis and control points,

[0019] the center point of the pile position of each pile is laid out, and obvious marks are made with lime, and elevation reference points are set to control the elevation of the pile top;

[0020] S3: pile machine is in place: the static pressure frame body (walking type) is moved to the pile position, the machine body is adjusted to be horizontal, the center of the static pressure frame body is aligned with the center point of the pile position, and the deviation is controlled within the allowable range (≤20mm);

[0021] S4: pile hoisting and feeding: using the crane provided with the static pressure frame body, the pipe pile is hoisted, appropriate hoisting points (0.293L at the pile end, L is the length of the pile) and hoisting ropes are adopted, the pipe pile is stably fed into the support frame of the static pressure frame body, between the floating blocks in the annular array, the floating blocks are pushed by the clamping hydraulic cylinders located below, the floating blocks are in contact with the outer surface of the PHC pipe pile through the wear-resistant layer, and then the floating blocks are positioned and clamped, the pushing force of the clamping hydraulic cylinders is adjusted through the pressure received by the pressure sensor, the floating blocks are deflected on the adjusting frame after contacting the outer surface of the PHC pipe pile, so that the floating blocks are more attached to the PHC pipe pile, and the adjusting frame is pressed in the sealing sleeve, the connecting spring is stretched, the gas in the sealing sleeve is pressed, the pressed gas enters the connecting pipeline, enters the sealing air bag through the connecting pipeline, and the sealing air bag expands to push the pressing plate, the reset spring is pushed, and the clamping of the PHC pipe pile is completed;

[0022] S5: the static pressure multistage hydraulic cylinder drives the switching frame to descend, so that the PHC pipe pile is inserted into the positioning point, after the switching frame moves to the position, the floating block located above clamps one end of the pipe pile, the static pressure multistage hydraulic cylinder is started, the switching frame is lowered, and the adjusting hydraulic cylinder is started to slide and insert with one end of the moving groove, so that the roller can only rotate along the vertical direction groove wall of the moving groove;

[0023] S6: the switching frame located below is raised by the pushing frame of the static pressure multistage hydraulic cylinder, the stop block located below is inserted with the moving groove under the pushing of the adjusting hydraulic cylinder, the vertical groove of the moving groove is blocked, so that the slider moves on the guide rail while the roller on the switching frame moves in the curved groove on one side of the moving groove, the switching frame is pulled to move upward, the position of the clamping hydraulic cylinder and the floating block located below is changed, the switching frame located above is avoided, the PHC is clamped, and the switching frame is lowered.

[0024] The beneficial effects in the application are:

[0025] 1. By setting the switching device, it can facilitate continuous piling, when the roller on the switching frame encounters the curved groove of the moving groove, it can drive the switching frame to move on the sliding block, change the position of the static pressure device, facilitate the downward movement of another group of static pressure devices, complete the switching work, so as to achieve continuous piling, through the movement of the stop block, the trajectory of the roller moving in the moving groove can be changed, so that the roller can move downward in the vertical groove of the moving groove when the switching frame descends for piling, and the roller moves in the curved groove of the moving groove when the switching frame rises for position switching, thereby avoiding the descent and resetting of another switching frame, solving the technical problems of the existing PHC pipe pile construction device that cannot continuously static pressure and low efficiency.

[0026] 2. By setting the static pressure device, it can adapt to PHC pipe piles of various diameters, improve the practicability, and the floating block can be deflected to fit the surface of the PHC pipe pile, increase the contact area, and disperse the stress, and the elastic force of the connecting spring, the reset spring and the sealing air bag is matched to increase the adhesion of the floating block to the PHC pipe pile, increase the clamping force, and the floating block can be deflected and moved to change the position, facilitate the adaptation to PHC pipe piles of different diameters, solve the technical problems of the existing PHC pipe pile construction device that can cause high risk of surface damage of the pile body, fast wear of the jaw, high maintenance cost and poor adaptability to different diameter PHC pipe piles. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 A schematic diagram of a PHC pipe pile construction device is proposed in the present application;

[0028] Figure 2 A perspective view of the support frame structure of the PHC pipe pile construction device is proposed in the present application;

[0029] Figure 3 A perspective view of the switching frame structure of the PHC pipe pile construction device is proposed in the present application;

[0030] Figure 4 A perspective view of the stop block structure of the PHC pipe pile construction device is proposed in the present application;

[0031] Figure 5 A perspective view of the static pressure multi-stage hydraulic cylinder structure of the PHC pipe pile construction device is proposed in the present application;

[0032] Figure 6 A perspective view of the sliding block structure of the PHC pipe pile construction device is proposed in the present application;

[0033] Figure 7 A perspective view of the floating block structure of the PHC pipe pile construction device is proposed in the present application;

[0034] Figure 8 A perspective view of a sealing sleeve structure of a PHC pipe pile construction device according to the present application;

[0035] Figure 9 A perspective view of an adjusting frame structure of a PHC pipe pile construction device according to the present application;

[0036] Figure 10 A perspective view of a reset spring structure of a PHC pipe pile construction device according to the present application.

[0037] In the figure: 1, static pressure frame body; 2, support frame; 21, moving groove; 22, guide rail; 23, sliding block; 24, switching frame; 25, roller; 3, adjusting hydraulic cylinder; 31, stop block; 4, static pressure multi-stage hydraulic cylinder; 5, clamping hydraulic cylinder; 51, mounting plate; 52, sealing sleeve; 53, adjusting frame; 54, connecting spring; 6, floating block; 61, wear-resistant layer; 62, pressure sensor; 7, connecting pipeline; 71, protective shell; 72, sealing air bag; 73, pressing plate; 74, reset spring. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0039] Reference Figures 1-10 A PHC pipe pile construction device, comprising a static pressure frame body 1, the upper surface of the static pressure frame body 1 is provided with a static pressure component, the static pressure component comprises a switching device and a static pressure device.

[0040] As shown in Figures 2-6 , the switching device is located on the upper surface of the static pressure frame body 1 and switches the static pressure device, the switching device comprises a switching frame 24, the movement of the switching frame 24 drives the static pressure device to move.

[0041] Specifically, in order to facilitate the movement of the switching frame 24, the switching device further comprises a support frame 2, the support frame 2 is fixedly installed on the upper surface of the static pressure frame body 1, four support frames 2 are arranged in a ring array and surround the plug-in hole on the static pressure frame body 1, the plug-in hole facilitates the PHC pipe pile to be plugged into the ground, the outer surface of the support frame 2 is provided with a moving groove 21, the moving groove 21 is composed of a curved groove and a vertical groove, the outer surface of the support frame 2 is fixedly installed with a guide rail 22, the outer surface of the guide rail 22 is slidingly plugged with a sliding block 23, the outer surface of the sliding block 23 is slidingly plugged with the outer surface of the switching frame 24, which facilitates the sliding block 23 to drive the switching frame 24 to ascend and descend.

[0042] Specifically, in order to drive the switching frame 24 to move, the outer surface of the switching frame 24 is rotatably connected with a roller 25, and the outer surface of the roller 25 is slidably inserted with the inner wall of the moving groove 21.

[0043] Specifically, in order to change the moving line of the switching frame 24, the outer surface of the support frame 2 is fixedly installed with an adjusting hydraulic cylinder 3, one end of the piston rod of the adjusting hydraulic cylinder 3 is fixedly installed with a stop block 31, one end of the stop block 31 is slidably inserted with the inner wall of the moving groove 21, and the switching frame 24 moves along the vertical groove direction of the moving groove 21 when the switching frame 24 descends, and the switching frame 24 moves along the curved groove direction when the switching frame 24 rises, by the lifting of the stop block 31.

[0044] Specifically, in order to drive the switching frame 24 to automatically lift, the outer surface of the static pressure frame body 1 is fixedly installed with a static pressure multi-stage hydraulic cylinder 4, and one end of the piston rod of the multi-stage hydraulic cylinder is fixedly installed with the outer surface of the switching frame 24.

[0045] By setting the switching device, the continuous pile driving can be facilitated, the switching frame 24 can be driven to move on the sliding block 23 when the roller 25 on the switching frame 24 encounters the curved groove of the moving groove 21, the position of the static pressure device can be changed, another group of static pressure devices can be facilitated to move downward to complete the switching work, so that the continuous pile driving can be achieved, and the trajectory of the roller 25 moving in the moving groove 21 can be changed by the movement of the stop block 31, so that the roller 25 can move downward in the vertical groove of the moving groove 21 when the switching frame 24 descends for pile driving, and the roller 25 moves in the curved groove of the moving groove 21 when the switching frame 24 rises for position switching, thereby avoiding the descent and resetting of another switching frame 24, and the technical problems of the existing PHC pipe pile construction device that cannot continuously perform static pressure and low efficiency are solved.

[0046] As shown in Figures 7-10 The static pressure device is located on the outer surface of the switching frame 24 and performs static pressure work on the PHC pipe pile, and the static pressure device comprises a floating block 6, and a plurality of floating blocks 6 clamp the PHC pipe pile to be constructed.

[0047] Specifically, in order to clamp the PHC pipe pile, the static pressure device further comprises a clamping hydraulic cylinder 5, the clamping hydraulic cylinder 5 is fixedly installed on the outer surface of the switching frame 24, and one end of the piston rod of the clamping hydraulic cylinder 5 is fixedly installed with a mounting plate 51.

[0048] Specific, in order to facilitate the floating block 6 to move, fit the surface of the PHC pipe pile, the outer surface of the mounting plate 51 is fixedly installed with a sealing sleeve 52, the sealing sleeve 52 is filled with gas, the inner wall of the sealing sleeve 52 is slidably connected with an adjusting frame 53, a sealing ring is arranged between the adjusting frame 53 and the sealing sleeve 52 to prevent gas leakage, and the outer surface of the adjusting frame 53 is fixedly installed with a connecting spring 54, one end of the connecting spring 54 is fixedly installed with the outer surface of the sealing sleeve 52, so as to facilitate the resetting of the adjusting frame 53.

[0049] Specific, in order to clamp the PHC pipe pile, the outer surface of the adjusting frame 53 is hinged with the outer surface of the floating block 6 through a pin shaft, in order to reduce the wear resistance of the floating block 6, the outer surface of the floating block 6 is fixedly installed with a wear-resistant layer 61 made of ceramic-metal composite material, and in order to detect the pressure received by the floating block 6, the surface of the floating block 6 is fixedly installed with a pressure sensor 62.

[0050] Specific, in order to facilitate the resetting of the adjusting frame 53, the outer surface of the sealing sleeve 52 is fixedly communicated with a connecting pipe 7, the outer surface of the mounting plate 51 is fixedly installed with a protective shell 71, the inner wall of the protective shell 71 is fixedly installed with a sealing air bag 72, one end of the connecting pipe 7 is fixedly communicated with the outer surface of the sealing air bag 72, in order to facilitate the resetting of the sealing air bag 72, the inner wall of the protective shell 71 is slidably connected with a pressing plate 73, the outer surface of the pressing plate 73 is fixedly installed with a reset spring 74, and the outer surface of the pressing plate 73 is in contact with the outer surface of the sealing air bag 72.

[0051] By setting the static pressure device, the PHC pipe pile of various diameters can be adapted, the practicability is improved, the floating block 6 can be deflected, so that the PHC surface is fitted, the contact area is increased, the stress is dispersed, and the elastic force of the connecting spring 54, the reset spring 74 and the sealing air bag 72 is matched to increase the fitting of the floating block 6 to the PHC pipe pile, increase the clamping force, and the floating block 6 can be deflected and moved, so as to change the position, facilitate the adaptation of PHC pipe piles of different diameters, solve the technical problems that the existing PHC pipe pile construction device can cause high risk of pile surface damage, fast wear of the jaw, high maintenance cost and poor adaptability to different diameter PHC pipe piles.

[0052] The construction method of the PHC pipe pile construction device provided by the application comprises the following steps:

[0053] S1: site preparation: clean and level the site, ensure that the static pressure frame body 1 can walk and work stably, handle underground obstacles, set up drainage ditches to ensure that the site does not accumulate water, and harden the site, especially the soft soil foundation, to meet the grounding pressure and stability requirements of the static pressure frame body 1;

[0054] S2: measurement and line laying: according to the design drawing, accurately measure and lay the building axis and control points,

[0055] The center point of the pile position of each pile is released and marked with lime, and the elevation reference point is set to control the elevation of the pile top;

[0056] S3: Pile machine is in place: the static pressure machine body 1 is moved to the vicinity of the pile position, the machine body is adjusted to be horizontal, the center of the static pressure machine body 1 is aligned with the center point of the pile position, and the deviation is controlled within the allowable range (≤20mm);

[0057] S4: Pile lifting and feeding: using the crane provided with the static pressure machine body 1, the pipe pile is lifted, the appropriate lifting point (0.293L at the pile end, L is the length of the pile and the lifting cable) is adopted, the pipe pile is smoothly fed into the support frame 2 between the static pressure machine body 1, located between the floating blocks 6 in the annular array, the floating blocks 6 are pushed by the clamping hydraulic cylinders 5 located below, the floating blocks 6 are in contact with the outer surface of the PHC pipe pile through the wear-resistant layer 61, and then the floating blocks 6 are positioned and clamped, the pushing force of the clamping hydraulic cylinders 5 is adjusted through the pressure received by the pressure sensor 62, after the floating blocks 6 contact the outer surface of the PHC pipe pile, the floating blocks 6 are deflected on the adjusting frame 53, so that the floating blocks 6 are more fitted to the PHC pipe pile, and the adjusting frame 53 is pressed in the sealing sleeve 52, the connecting spring 54 is stretched, the gas in the sealing sleeve 52 is pressed, the pressed gas enters the connecting pipeline 7, enters the sealing air bag 72 through the connecting pipeline 7, and after the sealing air bag 72 expands, the clamping of the PHC pipe pile is completed;

[0058] S5: The static pressure multi-stage hydraulic cylinder 4 drives the switching frame 24 to descend, so that the PHC pipe pile is inserted into the positioning point, after the switching frame 24 moves to the position, the floating blocks 6 located above clamp one end of the pipe pile, after the static pressure multi-stage hydraulic cylinder 4 starts, the switching frame 24 is lowered, and at the same time, the adjusting hydraulic cylinder 3 starts to slide and insert with one end of the moving groove 21, so that the roller 25 can only rotate along the vertical direction groove wall of the moving groove 21;

[0059] S6: The switching frame 24 located below is raised by the pushing frame of the static pressure multi-stage hydraulic cylinder 4, the stop block 31 located below is inserted with the moving groove 21 by the pushing of the adjusting hydraulic cylinder 3, the vertical groove of the moving groove 21 is blocked, so that the sliding block 23 moves on the guide rail 22 while the roller 25 on the switching frame 24 moves in the curved groove on one side of the moving groove 21, the switching frame 24 is pulled to slide and move upward, the positions of the clamping hydraulic cylinder 5 and the floating block 6 located below are changed, the switching frame 24 located above is avoided, the PHC is clamped, and then the switching frame 24 is lowered.

[0060] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A PHC pipe pile construction device comprising a static pressure frame body (1), characterized in that: The upper surface of the static pressure frame body (1) is provided with a static pressure component, which comprises a switching device and a static pressure device; The switching device is located on the upper surface of the static pressure frame body (1) and switches the static pressure device, and the switching device comprises a switching frame (24), the movement of the switching frame (24) drives the static pressure device to move; The static pressure device is located on the outer surface of the switching frame (24) and performs static pressure work on the PHC pipe pile, and the static pressure device comprises a floating block (6), and a plurality of groups of the floating block (6) clamp the PHC pipe pile to be constructed.

2. The PHC pile construction apparatus according to claim 1, characterized in that: The switching device further comprises a support frame (2) fixedly installed on the upper surface of the static pressure frame body (1), the outer surface of the support frame (2) is provided with a moving groove (21), the outer surface of the support frame (2) is fixedly provided with a guide rail (22), the outer surface of the guide rail (22) is slidably connected with a sliding block (23), and the outer surface of the sliding block (23) is slidably connected with the outer surface of the switching frame (24).

3. The PHC pile construction apparatus according to claim 2, characterized in that: The outer surface of the switching frame (24) is rotatably connected with a roller (25), and the outer surface of the roller (25) is slidably connected with the inner wall of the moving groove (21).

4. The PHC pile construction apparatus according to claim 2, characterized in that: The outer surface of the support frame (2) is fixedly provided with an adjusting hydraulic cylinder (3), one end of the piston rod of the adjusting hydraulic cylinder (3) is fixedly provided with a stop block (31), and the other end of the stop block (31) is slidably connected with the inner wall of the moving groove (21).

5. The PHC pile construction apparatus according to claim 1, characterized in that: The outer surface of the static pressure frame body (1) is fixedly provided with a static pressure multi-stage hydraulic cylinder (4), and one end of the piston rod of the multi-stage hydraulic cylinder is fixedly connected with the outer surface of the switching frame (24).

6. The PHC pile construction apparatus according to claim 1, wherein: The static pressure device further comprises a clamping hydraulic cylinder (5) fixedly installed on the outer surface of the switching frame (24), and one end of the piston rod of the clamping hydraulic cylinder (5) is fixedly provided with a mounting plate (51).

7. The PHC pile construction apparatus according to claim 6, wherein: The outer surface of the mounting plate (51) is fixedly provided with a sealing sleeve (52), the inner wall of the sealing sleeve (52) is slidably connected with an adjusting frame (53), the outer surface of the adjusting frame (53) is fixedly provided with a connecting spring (54), and one end of the connecting spring (54) is fixedly connected with the outer surface of the sealing sleeve (52).

8. The PHC pile construction apparatus according to claim 7, characterized in that: The outer surface of the adjusting frame (53) is hingedly connected with the outer surface of the floating block (6) through a pin shaft, the outer surface of the floating block (6) is fixedly provided with a wear-resistant layer (61), and the surface of the floating block (6) is fixedly provided with a pressure sensor (62).

9. The PHC pile construction apparatus according to claim 8, wherein: The outer surface of the sealing sleeve (52) is fixedly communicated with a connecting pipeline (7), the outer surface of the mounting plate (51) is fixedly installed with a protective shell (71), the inner wall of the protective shell (71) is fixedly installed with a sealing air bag (72), one end of the connecting pipeline (7) is fixedly communicated with the outer surface of the sealing air bag (72), the inner wall of the protective shell (71) is slidably inserted with a pressing plate (73), the outer surface of the pressing plate (73) is fixedly installed with a return spring (74), and the outer surface of the pressing plate (73) is in contact with the outer surface of the sealing air bag (72).

10. A construction method of a PHC pipe pile construction device, using the PHC pipe pile construction device according to any one of claims 1-9, characterized in that: S1: site preparation: clean and level the site, ensure that the static pressure frame body (1) can walk and work stably, handle underground obstacles, set up drainage ditches to ensure that the site does not accumulate water, and perform site hardening, especially for soft soil foundations, to meet the grounding pressure and stability requirements of the static pressure frame body (1); S2: measurement and line laying: according to the design drawings, accurately measure and lay the building axis, control points, and mark the center point of each pile position with lime, and set up elevation reference points for controlling the top elevation of the pile; S3: pile machine positioning: move the static pressure frame body (1) (walking type) to the vicinity of the pile position, adjust the machine body to be horizontal, align the center of the static pressure frame body (1) with the center point of the pile position, and control the deviation within the allowable range (≤20mm); S4: pile lifting and feeding: use the crane provided with the static pressure frame body (1) to lift the pipe pile, use appropriate lifting points (0.293L at the pile end, L is the pile length) and lifting ropes, and stably feed the pipe pile into the support frame (2) of the static pressure frame body (1) between the floating blocks (6) in the annular array, push the floating blocks (6) through the lower clamping hydraulic cylinders (5), and after the floating blocks (6) contact the outer surface of the PHC pipe pile through the wear-resistant layer (61), position and clamp the PHC pipe pile, adjust the pushing force of the clamping hydraulic cylinder (5) through the pressure received by the pressure sensor (62), and after the floating blocks (6) contact the outer surface of the PHC pipe pile, deflect on the adjusting frame (53) to make the floating blocks (6) more conform to the PHC pipe pile, and at the same time, the adjusting frame (53) is pressed in the sealing sleeve (52), the connecting spring (54) is stretched, the gas in the sealing sleeve (52) is pressed, the pressed gas enters the connecting pipeline (7), enters the sealing air bag (72) through the connecting pipeline (7), and after the sealing air bag (72) expands, the pressing plate (73) is pushed, the return spring (74) is pushed, and the clamping of the PHC pipe pile is completed. S5: The static pressure multi-stage hydraulic cylinder (4) drives the switching frame (24) to descend, so that the PHC pipe pile is inserted into the positioning point. After the switching frame (24) is moved to the position, the floating block (6) located above clamps one end of the pipe pile. After the static pressure multi-stage hydraulic cylinder (4) is started, it drives the switching frame (24) to descend, and adjusts the hydraulic cylinder (3) to start and slide and insert with one end of the moving groove (21), so that the roller (25) can only rotate along the vertical direction groove wall of the moving groove (21); S6: At the same time, the switching frame (24) located below rises under the pushing of the static pressure multi-stage hydraulic cylinder (4). The stop block (31) located below is inserted with the moving groove (21) under the pushing of the adjusting hydraulic cylinder (3), and blocks the vertical groove of the moving groove (21), so that the slider (23) moves on the guide rail (22) while the roller (25) on the switching frame (24) moves in the curved groove on one side of the moving groove (21), pulls the switching frame (24) to move upwards, changes the position of the clamping hydraulic cylinder (5) and the floating block (6) located below, avoids the switching frame (24) located above from descending, and facilitates clamping the PHC above to descend.

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