Hammering prestressed pipe pile and construction method

Abstract

The application relates to the field of pipe piles, in particular to a hammering prestressed pipe pile which comprises a pipe pile, a supporting device, a supporting plate and a steel reinforcement cage; the supporting plate is fixed in the pipe pile, the bottom end of the steel reinforcement cage is fixedly connected with the supporting plate; the supporting device is arranged in the pipe pile and is used for upwardly supporting the supporting plate; the supporting device comprises a mounting plate, a sleeve screw rod, a supporting plate and a driving mechanism; the mounting plate is fixed in the pipe pile, the sleeve is arranged on the mounting plate and is rotationally connected with the mounting plate; the screw rod penetrates through the sleeve and is in threaded cooperation with the sleeve; the top end of the screw rod is fixedly connected with the supporting plate, and the upper surface of the supporting plate is abutted against the lower surface of the supporting plate; the driving mechanism is arranged on the mounting plate and is used for driving the sleeve to rotate. The application increases the stability of the supporting plate supporting the steel reinforcement cage.

Description

Technical Field

[0001] This application relates to the field of pipe piles, and in particular to a hammer-driven prestressed pipe pile and a construction method thereof. Background Technology

[0002] Prestressed concrete pipe piles, as a type of precast concrete pile, feature high single-pile bearing capacity, low cost per unit bearing capacity, fast construction speed, and reliable pile quality. They are generally suitable for soil conditions such as soft soil, cohesive soil, silt, sand, and completely weathered rock. They are widely used in construction, railway, highway, bridge, port, and dock engineering projects.

[0003] A related technology discloses a steel cage assembly for bamboo-joint piles, also known as a hammer-driven prestressed pipe pile. This core-filling steel cage includes multiple ring bars and multiple vertical bars. The ring bars are arranged sequentially from top to bottom, and the vertical bars are uniformly welded in a ring to the outer or inner side of each ring bar. It also includes a cap, which is larger than the diameter of the central hole of the bamboo-joint pile. M uniformly distributed longitudinal through holes are opened on both end faces of the bamboo-joint pile, and N through holes are opened on the cap. These through holes are uniformly arranged in a ring, with each through hole corresponding to a longitudinal through hole. A pin is installed in each through hole, and the lower part of the pin can be inserted into the corresponding longitudinal through hole. A circular support plate is provided at the bottom of the core-filling steel cage, and an annular clamping plate is provided in the middle of the core-filling steel cage. The outer diameter of the annular clamping plate is larger than the diameter of the central hole of the bamboo-joint pile and can be clamped onto the upper edge of the central hole of the bamboo-joint pile. The diameter of the circular support plate is 2-6 mm smaller than the diameter of the central hole of the bamboo-joint pile. The projections of all the ring bars and vertical bars of the core-filling steel cage on the horizontal plane fall within the projection area of ​​the circular support plate on the horizontal plane. The annular support plate has M threaded through holes, which correspond one-to-one with the longitudinal through holes on the end faces of the bamboo-joint piles and coincide with the axis. The root circle diameter of each threaded through hole is less than or equal to the diameter of the center hole of the bamboo-joint pile. Each threaded through hole is equipped with an anchor bolt, and each anchor bolt is also equipped with a double-ended nut at the top. The center hole of the double-ended nut has an upper threaded hole and a lower threaded hole. The upper threaded hole and the lower threaded hole are axially opposite and have opposite spiral directions. The corresponding steel bars of the foundation cap or the supporting beam are provided with external threads. The upper threaded hole of each double-ended nut is tightened on the external thread of the corresponding steel bar, and the lower threaded hole is tightened on the corresponding anchor bolt. M and N are positive integers, and N is equal to one-half, one-third, or one-quarter of M.

[0004] Regarding the aforementioned technologies, the inventors believe that the following defects exist: Since the support plate is fixed inside the pipe pile and the reinforcing cage is installed on the surface of the support plate, the support plate has an upward supporting effect on the reinforcing cage. Since the reinforcing cage includes multiple reinforcing bars, the pressure of the reinforcing cage on the support plate is relatively large. Under the pressure of the reinforcing cage, the support plate is prone to relative sliding with the pipe pile, which reduces the stability of the support plate supporting the reinforcing cage. Summary of the Invention

[0005] To increase the stability of the steel cage supported by the support plate, this application provides a hammer-driven prestressed pipe pile and a construction method thereof.

[0006] Firstly, this application provides a technical solution for a hammer-driven prestressed concrete pipe pile, using the following method: A hammer-driven prestressed concrete pipe pile includes a pipe pile, a support device, a support plate, and a reinforcing cage; the support plate is fixed inside the pipe pile, and the bottom end of the reinforcing cage is fixedly connected to the support plate; the support device is disposed inside the pipe pile and is used to support the support plate upward. The support device includes a mounting plate, a sleeve screw, a support plate, and a drive mechanism; the mounting plate is fixed inside the pipe pile, the sleeve passes through the mounting plate, and the sleeve is rotatably connected to the mounting plate; the screw passes through the sleeve, the screw is threadedly engaged with the sleeve, the top end of the screw is fixedly connected to the support plate, and the upper surface of the support plate abuts against the lower surface of the support plate; the drive mechanism is disposed on the mounting plate, and the drive mechanism is used to drive the sleeve to rotate.

[0007] By adopting the above technical solution, since the sleeve is rotatably mounted on the mounting plate, the lead screw is threadedly engaged with the sleeve, and the top end of the lead screw is fixedly connected to the support plate; therefore, the sleeve is driven to rotate by the drive mechanism, and the sleeve can easily drive the lead screw to rise and fall during the rotation process, and the lead screw can easily drive the support plate to rise and fall during the rising and falling process, thereby facilitating the adjustment of the height of the support plate. When the upper surface of the support plate abuts against the lower surface of the support plate, the support plate provides upward support to the support plate, thereby increasing the stability of the support plate in supporting the reinforcing cage.

[0008] Optionally, the drive mechanism includes a worm gear, a worm, a motor, and two support blocks; both support blocks are fixed to the mounting plate, and the two ends of the worm are rotatably connected to the two support blocks respectively; the worm gear is sleeved on the sleeve, the worm gear is fixedly connected to the sleeve, and the worm gear meshes with the worm; the motor is fixed to the mounting plate, and the output shaft of the motor is fixedly connected to the end of the worm.

[0009] By adopting the above technical solution, the motor drives the worm to rotate, the worm drives the worm wheel to rotate, and the worm wheel drives the sleeve to rotate. This not only facilitates the simultaneous lifting and lowering of the lead screw and the support plate, but also, because the worm wheel and worm gear structure has a self-locking function, the worm wheel and worm gear will not rotate under the action of other external forces when the motor stops running, thus ensuring that the sleeve will not rotate, and in turn ensuring that the lead screw will not rise or fall, thereby increasing the stability of the lead screw and the support plate in supporting the support plate.

[0010] Optionally, a fixing part is fixedly provided on the support block, and a waist-shaped hole is opened on the fixing part. A bolt is inserted into the waist-shaped hole, and the bolt is threadedly engaged with the mounting plate.

[0011] By adopting the above technical solution, the bolt nut and the mounting plate have a clamping effect on the fixing part, thereby fixing the fixing part to the mounting plate, and thus fixing the support block to the mounting plate, which increases the convenience for workers to install and disassemble the support block.

[0012] Optionally, the length direction of the waist-shaped hole is perpendicular to the length direction of the worm.

[0013] By adopting the above technical solution, since the length direction of the oblong hole is perpendicular to the length direction of the worm, the operator can release the fixing effect of the bolt on the fixing part, and then adjust the position of the two support blocks along the length direction of the oblong hole. This makes it easy to adjust the position of the worm towards or away from the worm wheel, thereby ensuring that the worm wheel and the worm mesh with each other.

[0014] Optionally, a positioning block is fixedly provided at the top of the lead screw, and a positioning groove is provided on the support plate, with the side wall of the positioning block abutting against the inner side wall of the positioning groove.

[0015] By adopting the above technical solution, the positioning groove has a positioning function for the positioning block, thereby increasing the efficiency of the workers in installing the positioning block on the support plate, and thus increasing the efficiency of the workers in installing the lead screw on the support plate.

[0016] Optionally, the positioning block is polygonal in shape.

[0017] By adopting the above technical solution, since the positioning block is polygonal in shape and its sidewall abuts against the inner sidewall of the positioning groove, and the positioning block is polygonal in shape, the positioning block and the support plate will not rotate relative to each other during the rotation process, thereby ensuring that the lead screw and the support plate will not rotate relative to each other, thus ensuring that the sleeve can always drive the lead screw and the support plate to rise and fall during the rotation process.

[0018] Optionally, a plurality of connectors are fixedly installed inside the pipe pile. The connectors include a first connecting block and a second connecting block that are fixedly connected. The first connecting block is fixedly connected to the inner side wall of the pipe pile, and the second connecting block is fixedly connected to the mounting plate.

[0019] By adopting the above technical solution, multiple connectors not only increase the firmness of the connection between the mounting plate and the pipe pile, but also provide upward support for the mounting plate.

[0020] Optionally, the first connecting block has a first adjusting hole that extends vertically; a first bolt passes through the first adjusting hole and is threaded into the pipe pile; the second connecting block has a second adjusting hole that extends horizontally; a second bolt passes through the second adjusting hole and is threaded into the mounting plate.

[0021] By adopting the above technical solution, the nut of the first bolt and the pipe pile have a clamping effect on the first connecting block, thereby fixing the first connecting block to the inner wall of the pipe pile. This not only increases the convenience for workers to install and disassemble the first connecting block, but also makes it easier for workers to adjust the height of the first connecting block, thus ensuring that the second connecting block abuts against the lower surface of the mounting plate. The nut of the second bolt and the mounting plate have a clamping effect on the second connecting block, thereby fixing the second connecting block to the mounting plate. This not only increases the space between workers for installing and disassembling the second connecting block, but also makes it easier for workers to adjust the position of the second connecting block in the direction closer to or farther from the pipe pile, thus ensuring that the side wall of the first connecting block abuts against the inner wall of the pipe pile.

[0022] Optionally, the side of the first connecting block closest to the pipe pile is an arc-shaped surface, which abuts against the inner wall of the pipe pile.

[0023] By adopting the above technical solution, the arc-shaped surface increases the contact area between the first connecting block and the inner wall of the pipe pile, thereby increasing the firmness of the connection between the first connecting block and the pipe pile.

[0024] Secondly, this application also provides a construction method for hammer-driven prestressed concrete pipe piles, comprising the following steps: Step 1: The workers install the support device inside the pipe pile, and then install the support plate and the steel cage inside the pipe pile; Step 2: Check the re-pile positions; Step 3: Positioning the piling machine; Step 4: Lifting the pile driver; Step 5: Alignment and stake insertion; Step Six: Adjust the verticality of the pipe piles and pile frame; Step 7: Piling; Step 8: Electric welding of the pile; Step Nine: Continue pile driving; Step 10: Measure penetration; Step 11: Put away the hammer.

[0025] By adopting the above technical solution, the support device provides upward support to the support plate, thereby increasing the stability of the support plate in supporting the steel cage.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. Since the sleeve is rotatably mounted on the mounting plate, the lead screw is threadedly engaged with the sleeve, and the top end of the lead screw is fixedly connected to the support plate; therefore, the sleeve is driven to rotate by the drive mechanism. During the rotation of the sleeve, it is easy to drive the lead screw to rise and fall. During the rise and fall of the lead screw, it is easy to drive the support plate to rise and fall, thereby facilitating the adjustment of the height of the support plate. When the upper surface of the support plate abuts against the lower surface of the support plate, the support plate provides upward support to the support plate, thereby increasing the stability of the support plate in supporting the reinforcing cage. 2. The motor drives the worm gear to rotate, which in turn drives the worm wheel to rotate, and the worm wheel drives the sleeve to rotate. This not only facilitates the simultaneous lifting and lowering of the lead screw and the support plate, but also, because the worm gear structure has a self-locking function, the worm gear will not rotate under the action of other external forces when the motor stops running. This ensures that the sleeve will not rotate, and thus ensures that the lead screw will not lift or lower, thereby increasing the stability of the lead screw and the support plate in supporting the support plate. 3. The bolt nuts and mounting plates clamp the fixing part, thereby fixing the fixing part to the mounting plate, and thus fixing the support block to the mounting plate, increasing the convenience for workers to install and disassemble the support block. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the hammer-driven prestressed pipe pile in the embodiments of this application.

[0028] Figure 2 This is a half-sectional view of the pipe pile in the embodiment of this application.

[0029] Figure 3 yes Figure 2 A magnified view of part A in the middle.

[0030] Explanation of reference numerals in the attached figures: 1. Pipe pile; 2. Mounting plate; 3. Sleeve; 4. Screw rod; 41. Positioning block; 5. Support plate; 51. Positioning groove; 6. Drive mechanism; 61. Worm gear; 62. Worm; 63. Motor; 64. Support block; 65. Fixing part; 66. Waist-shaped hole; 7. Support plate; 71. Annular groove; 72. Sealing ring; 8. Reinforcing cage; 9. Connector; 91. First connecting block; 911. First adjusting hole; 912. First bolt; 92. Second connecting block; 921. Second adjusting hole; 922. Second bolt. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0032] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, the technical or scientific terms used in this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components.

[0033] This application discloses a hammer-driven prestressed concrete pipe pile 1. (Refer to...) Figure 1 and Figure 2 The hammer-driven prestressed concrete pipe pile 1 includes a pipe pile 1, a support device, a support plate 7, and a reinforcing cage 8. The support plate 7 is fixed inside the pipe pile 1, and the bottom end of the reinforcing cage 8 is fixedly connected to the support plate 7. The support device is installed inside the pipe pile 1 and is used to support the support plate 7 upwards. The support device provides upward support to the support plate 7, increasing the stability of the support plate 7 in supporting the reinforcing cage 8.

[0034] Reference Figure 2 and Figure 3The support device includes a mounting plate 2, a sleeve 3, a lead screw 4, a support plate 5, and a drive mechanism 6. The mounting plate 2 is fixed inside the pipe pile 1. The sleeve 3 passes through the mounting plate 2 and is rotatably connected to the mounting plate 2. The top end of the sleeve 3 is flush with the upper surface of the mounting plate 2, and the bottom end of the sleeve 3 is located on the lower surface of the mounting plate 2. The lead screw 4 extends vertically and passes through the sleeve 3, and the lead screw 4 is threadedly engaged with the sleeve 3. The top end of the lead screw 4 is fixedly connected to the support plate 5, and the upper surface of the support plate 5 abuts against the lower surface of the support plate 7. The drive mechanism 6 is mounted on the mounting plate 2 and is used to drive the sleeve 3 to rotate. Because the sleeve 3 is rotatably mounted on the mounting plate 2, the lead screw 4 is threadedly engaged with the sleeve 3, and the top end of the lead screw 4 is fixedly connected to the support plate 5. Therefore, the sleeve 3 is driven to rotate by the drive mechanism 6. During the rotation of the sleeve 3, the screw 4 is easily driven to rise and fall. During the rise and fall of the screw 4, the support plate 5 is easily driven to rise and fall, thereby facilitating the adjustment of the height of the support plate 5. When the upper surface of the support plate 5 abuts against the lower surface of the support plate 7, the support plate 5 provides upward support to the support plate 7, thereby increasing the stability of the support plate 7 in supporting the steel cage 8.

[0035] Reference Figure 3 The drive mechanism 6 includes a worm gear 61, a worm 62, a motor 63, and two support blocks 64. Both support blocks 64 are fixed to the lower surface of the mounting plate 2 and are parallel to each other. The worm 62 extends horizontally, with its two ends passing through the two support blocks 64, and both ends are rotatably connected to them. The worm gear 61 is sleeved on the sleeve 3 and is fixedly connected to it, meshing with the worm 62. The motor 63 is fixed to the mounting plate 2, and its output shaft is fixedly connected to the end of the worm 62. The motor 63 drives the worm 62 to rotate, which in turn drives the worm gear 61 to rotate, which in turn drives the sleeve 3 to rotate. This facilitates the simultaneous lifting and lowering of the lead screw 4 and the support plate 5. Meanwhile, since the worm gear 61 and worm 62 have a self-locking function, when the motor 63 stops running, the worm gear 61 and worm 62 will not rotate under the action of other external forces, thus ensuring that the sleeve 3 will not rotate, and in turn ensuring that the lead screw 4 will not rise or fall, thereby increasing the stability of the lead screw 4 and the support plate 5 supporting the support plate 7.

[0036] Continue to refer to Figure 3Each support block 64 has an integrally formed fixing part 65 on both opposite sides, and the upper surface of both fixing parts 65 abuts against the lower surface of the mounting plate 2. Each fixing part 65 has a slotted hole 66, the length direction of which is perpendicular to the length direction of the worm gear 62. A bolt passes through the slotted hole 66 and is threaded into the mounting plate 2. The nut of the bolt and the mounting plate 2 clamp the fixing part 65, thereby fixing the fixing part 65 to the mounting plate 2, and thus fixing the support block 64 to the mounting plate 2, increasing the convenience of installation and removal of the support block 64. Since the length direction of the slotted hole 66 is perpendicular to the length direction of the worm gear 62, the operator can release the bolts from the fixing part 65 and then adjust the position of the two support blocks 64 along the length direction of the slotted hole 66, thereby facilitating the adjustment of the position of the worm gear 62 towards or away from the worm wheel 61, ensuring that the worm wheel 61 and the worm gear 62 mesh.

[0037] Continue to refer to Figure 3 A positioning block 41 is fixedly installed at the top of the lead screw 4. The positioning block 41 is polygonal in shape, and in this embodiment, the horizontal cross-section of the positioning block 41 is rectangular. A positioning groove 51 is provided on the support plate 5. The side wall of the positioning block 41 abuts against the inner side wall of the positioning groove 51, and the lower surface of the positioning block 41 is flush with the lower surface of the mounting plate 2. On the one hand, the positioning groove 51 has a positioning function for the positioning block 41, thereby increasing the efficiency of the operator in installing the positioning block 41 on the support plate 5, and thus increasing the efficiency of the operator in installing the lead screw 4 on the support plate 5. Since the positioning block 41 is polygonal in shape, and the side wall of the positioning block 41 abuts against the inner side wall of the positioning groove 51, the positioning block 41 and the support plate 5 will not rotate relative to each other during rotation, thereby ensuring that the lead screw 4 and the support plate 5 will not rotate relative to each other, and thus ensuring that the sleeve 3 can always drive the lead screw 4 and the support plate 5 to rise and fall during rotation.

[0038] Continue to refer to Figure 3 Multiple connectors 9 are fixedly installed inside the pipe pile 1. Each connector 9 includes a first connecting block 91 and a second connecting block 92 that are fixedly connected. The first connecting block 91 is fixedly connected to the inner side wall of the pipe pile 1, and the second connecting block 92 is fixedly connected to the mounting plate 2. The multiple connectors 9 not only increase the firmness of the connection between the mounting plate 2 and the pipe pile 1, but also provide upward support for the mounting plate 2.

[0039] Continue to refer to Figure 3The first connecting block 91 has a first adjusting hole 911 extending vertically. A first bolt 912 passes through the first adjusting hole 911 and is threaded into the pipe pile 1. The second connecting block 92 has a second adjusting hole 921 extending horizontally. A second bolt 922 passes through the second adjusting hole 921 and is threaded into the mounting plate 2. The nut of the first bolt 912 and the pipe pile 1 clamp the first connecting block 91, thereby fixing the first connecting block 91 to the inner wall of the pipe pile 1. This not only increases the convenience of installation and disassembly of the first connecting block 91 for workers, but also facilitates the adjustment of the height of the first connecting block 91, thus ensuring that the second connecting block 92 abuts against the lower surface of the mounting plate 2. The nut of the second bolt 922 and the mounting plate 2 have a clamping effect on the second connecting block 92, thereby fixing the second connecting block 92 to the mounting plate 2. This not only increases the position between the workers installing and disassembling the second connecting block 92, but also makes it easier for the workers to adjust the position of the second connecting block 92 in the direction of approaching or moving away from the pipe pile 1, thereby ensuring that the side wall of the first connecting block 91 abuts against the inner side wall of the pipe pile 1.

[0040] Continue to refer to Figure 3 The side of the first connecting block 91 closest to the pipe pile 1 is an arc-shaped surface, which abuts against the inner wall of the pipe pile 1. The arc-shaped surface increases the contact area between the first connecting block 91 and the inner wall of the pipe pile 1, thereby increasing the firmness of the connection between the first connecting block 91 and the pipe pile 1.

[0041] Reference Figure 2 The outer wall of the support plate 7 is provided with an annular groove 71, and a sealing ring 72 is installed in the annular groove 71. The annular groove 71 has a positioning function for the sealing ring 72, and the sealing ring 72 increases the sealing between the support plate 7 and the pipe pile 1.

[0042] This application provides a construction method for a hammer-driven prestressed concrete pipe pile 1, comprising the following steps: Step 1: The workers set up the support device inside the pipe pile 1, and then set up the support plate 7 and the steel cage 8 inside the pipe pile 1; Step 2: Check the re-pile positions; Step 3: Positioning the piling machine; Step 4: Lifting the pile driver; Step 5: Alignment and stake insertion; Step Six: Adjust the verticality of pipe pile 1 and pile frame; Step 7: Piling; Step 8: Electric welding of the pile; Step Nine: Continue pile driving; Step 10: Measure penetration; Step 11: Put away the hammer.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hammer-driven prestressed pipe pile (1), characterized in that: The system includes a pipe pile (1), a support device, a support plate (7), and a reinforcing cage (8); the support plate (7) is fixed inside the pipe pile (1), and the bottom end of the reinforcing cage (8) is fixedly connected to the support plate (7); the support device is disposed inside the pipe pile (1) and is used to support the support plate (7) upward; the support device includes an mounting plate (2), a sleeve (3), a screw rod (4), a support plate (5), and a drive mechanism (6); the mounting plate (2) is fixed inside the pipe pile (1). The sleeve (3) passes through the mounting plate (2) and is rotatably connected to the mounting plate (2); the lead screw (4) passes through the sleeve (3) and is threadedly engaged with the sleeve (3); the top end of the lead screw (4) is fixedly connected to the support plate (5); the upper surface of the support plate (5) abuts against the lower surface of the support plate (7); the driving mechanism (6) is disposed on the mounting plate (2) and is used to drive the sleeve (3) to rotate. The pipe pile (1) is fixedly provided with a plurality of connectors (9). The connectors (9) include a first connecting block (91) and a second connecting block (92) that are fixedly connected. The first connecting block (91) is fixedly connected to the inner side wall of the pipe pile (1), and the second connecting block (92) is fixedly connected to the mounting plate (2). The first connecting block (91) has a first adjusting hole (911) extending vertically; a first bolt (912) is inserted into the first adjusting hole (911) and is threaded into the pipe pile (1); the second connecting block (92) has a second adjusting hole (921) extending horizontally; a second bolt (922) is inserted into the second adjusting hole (921) and is threaded into the mounting plate (2); The first connecting block (91) has an arc-shaped surface on the side near the pipe pile (1), and the arc-shaped surface abuts against the inner wall of the pipe pile (1).

2. The hammer-driven prestressed pipe pile (1) according to claim 1, characterized in that: The drive mechanism (6) includes a worm gear (61), a worm (62), a motor (63), and two support blocks (64); both support blocks (64) are fixed on the mounting plate (2), and the two ends of the worm (62) are rotatably connected to the two support blocks (64); the worm gear (61) is sleeved on the sleeve (3), the worm gear (61) is fixedly connected to the sleeve (3), and the worm gear (61) meshes with the worm (62); the motor (63) is fixed on the mounting plate (2), and the output shaft of the motor (63) is fixedly connected to the end of the worm (62).

3. The hammer-driven prestressed pipe pile (1) according to claim 2, characterized in that: A fixing part (65) is fixedly provided on the support block (64). A waist-shaped hole (66) is provided on the fixing part (65). A bolt is inserted into the waist-shaped hole (66) and the bolt is threaded into the mounting plate (2).

4. The hammer-driven prestressed pipe pile (1) according to claim 3, characterized in that: The length direction of the waist-shaped hole (66) is perpendicular to the length direction of the worm (62).

5. A hammer-driven prestressed pipe pile (1) according to claim 4, characterized in that: A positioning block (41) is fixedly provided at the top of the lead screw (4), and a positioning groove (51) is provided on the support plate (5). The side wall of the positioning block (41) abuts against the inner side wall of the positioning groove (51).

6. A hammer-driven prestressed pipe pile (1) according to claim 5, characterized in that: The positioning block (41) is polygonal in shape.

7. A construction method using the hammer-driven prestressed pipe pile (1) according to any one of claims 1-6, characterized in that, Includes the following steps: Step 1: The staff sets up the support device inside the pipe pile (1), and then sets up the support plate (7) and the steel cage (8) inside the pipe pile (1); Step 2: Check the pile position; Step 3: Position the pile driver; Step 4: Lift the pile driver; Step 5: Align and insert the pile; Step 6: Adjust the verticality of the pipe pile (1) and the pile frame; Step 7: Drive the pile; Step 8: Weld the pile; Step 9: Continue driving the pile; Step 10: Measure the penetration depth; Step 11: Stop hammering.

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