Prestressed high-strength concrete pipe pile construction equipment and construction method

Abstract

The present invention belongs to the field of pipe pile construction, and in particular relates to prestressed high-strength concrete pipe pile construction equipment and methods. The equipment comprises a base, a column, a slide A, a slide B, motors A and B, and a drilling mechanism. Slide A, driven by motor A for mounting the drilling mechanism, and slide B, driven by motor B for mounting the pipe pile nested with the drilling mechanism, are nested and slidably mounted on the column of the base. The breaker bar of the present invention effectively crushes rocks encountered by spirals B and C during soil drilling, thereby improving drilling efficiency.

Description

Technical Field

[0001] The present invention belongs to the field of pipe pile construction, and in particular relates to prestressed high-strength concrete pipe pile construction equipment and a construction method. Background Art

[0002] Prestressed high-strength concrete pipe piles are inserted directly into the foundation using pressure equipment due to their high strength. However, for harder soil layers, the pipe piles are prone to cracking during the pressure application process and require more powerful pressure equipment to apply pressure.

[0003] Because the pipe pile is hollow, an auger can be added to the pile, leaving a section exposed at the bottom to drill holes in the soil beneath it. The soil produced by drilling is then transported upward from the pile by the auger, making it easier to insert the pile into the soil without cracking due to excessive pressure and eliminating the need for more powerful pressure-applying equipment. However, due to the thick wall of the pipe pile, an auger with an outer diameter smaller than the inner diameter of the pile can only drill holes within the inner diameter of the pile after extending downward from the pile, and cannot drill and remove soil from the annular area covered by the lower end of the pile, making it difficult to insert the pile into the soil.

[0004] The present invention designs a prestressed high-strength concrete pipe pile construction equipment to solve the above problems. Summary of the Invention

[0005] In order to solve the above-mentioned defects in the prior art, the present invention discloses a prestressed high-strength concrete pipe pile construction equipment and a construction method, which are achieved by adopting the following technical solutions.

[0006] Disclosed is a prestressed high-strength concrete pipe pile construction device, comprising a base, a column, a slide A, a slide B, a motor A, a motor B, and a drilling mechanism. Slide A, driven by motor A for mounting the drilling mechanism, and slide B, driven by motor B for mounting the pipe pile nested with the drilling mechanism, are nested and slidably mounted on the column of the base. Slide A and slide B, located below it, have a structure for synchronously locking the two.

[0007] The drilling mechanism includes a breaker rod, a casing, a spiral piece A, a spiral piece B, a ring sleeve D, a reset spring, and a digging tooth, wherein the ring sleeve B is rotatably matched with the circular groove on the slide A, the ring sleeve B is driven to rotate by the motor D, and the ring sleeve B is connected to the casing by a bolt. The casing is equipped with a spiral piece A, the outer diameter of the spiral piece A is smaller than the inner diameter of the pipe pile, the lower end of the spiral piece A is connected to a spiral piece B with a variable outer diameter and pitch, and the lower end of the spiral piece B is equipped with a digging tooth; the lower end of the casing is nested with a sliding ring sleeve D connected to the lower end of the spiral piece B; a breaker rod with a sharp angle at its lower end is axially slid in the casing and driven by the hydraulic cylinder on the slide A; a reset spring is matched between the breaker rod and the ring sleeve D.

[0008] As a further improvement of the present technology, a number of vertically distributed ring sleeves C are nested in the annular groove on the outside of the sleeve, and a horizontal reinforcing rod is installed on each ring sleeve C. The reinforcing rod slides in the groove on the inner wall of the spiral piece B; the lowermost ring sleeve C rotates with the ring sleeve D.

[0009] As a further improvement of the present technology, a spiral piece C with a spiral angle of 180 degrees and the same pitch as the spiral piece B is installed on the two ring sleeves C at the lower end corresponding to the spiral piece B through two reinforcing rods; the lower end of the spiral piece C is flush with the lower end of the spiral piece B and is symmetrical with the center of the spiral piece B; the two reinforcing rods corresponding to the spiral piece C radially slide in the two sliding grooves on the inner wall of the spiral piece C; and a number of digging teeth are installed at the lower end of the spiral piece C.

[0010] As a further improvement of the present technology, an elastic plate is installed on the outer side of the middle portion of the spiral piece B to compact the wall of the hole drilled therein.

[0011] As a further improvement of this technology, the reset spring is located in the annular groove on the inner wall of the ring sleeve D; the reset spring is a compression spring; one end of the reset spring is connected to the inner wall of the annular groove, and the other end is connected to the annular bulge on the breaking rod.

[0012] As a further improvement of the present technology, the slide B is provided with a ring sleeve A that allows spiral pieces A, B and C to pass vertically upward; the lower end of the ring sleeve A is connected to a flange through a number of connecting rods evenly distributed circumferentially, and the flange at the lower end of the connecting rod is connected to the prefabricated flange at the upper end of the pipe pile by bolts; the flange at the lower end of the ring sleeve B is connected to the flange at the upper end of the casing by bolts; the upper end of the breaker rod is connected to the drive rod driven by the hydraulic cylinder through a detachable connector that can be rotatably matched therewith.

[0013] As a further improvement of the present technology, the base is equipped with three side supports for strengthening the support of the column; motor A and motor B are installed on the top seat at the top of the column; a winding wheel A driven by motor A and a winding wheel B driven by motor B are installed on the top seat; the wire rope A wound on the winding wheel A is connected to the slide A, and the wire rope B wound on the winding wheel B passes through the rope hole on the slide A and is connected to the slide B; a gear A is installed on the ring B, and the gear A is engaged with the gear B on the output shaft of the motor D.

[0014] As a further improvement of this technology, a synchronization rod is fixed at the lower end of the slide A and cooperates with the slot at the upper end of the slide B. The limiting groove on the side wall of the synchronization rod cooperates with the electric push rod installed in the movable groove on the inner wall of the slot.

[0015] As a further improvement of the present technology, a motor C and a winding wheel C driven by the motor C are installed on the base; the wire rope C wound around the winding wheel C is connected to the slide B.

[0016] As a further improvement to this technology, the construction method is as follows: 1. Insert the drilling mechanism into the pile from the end. 2. Insert the synchronization rod at the lower end of slide A into the slot on slide B and lock the synchronization rod using an electric push rod, so that slides A and B are synchronously locked. Start motors A, B, and C to drive slides A and B synchronously upward to the top of the column. 3. After simultaneously lifting the drilling mechanism and the pile using a crane, the breaker rod passes through rings A and B from bottom to top and connects to the drive rod via connectors. The flange at the upper end of the casing is bolted to the flange at the lower end of ring B. Simultaneously, the prefabricated flange at the upper end of the pile is bolted to the flange at the lower end of the connecting rod on ring A. 4. Start motors A and B to naturally release wire ropes A and B, causing the pile and drilling mechanism to move downward synchronously. Simultaneously, start motor D, which drives the drilling mechanism to rotate and drill a hole in the soil. The pile follows the spiral blade B of the drilling mechanism into the borehole. 5. When the drilling mechanism encounters rocks in the soil, the hydraulic cylinder is activated reciprocatingly, driving the breaker bar to move back and forth in a small, high-frequency, vertical direction to quickly and effectively break the rocks. 6. After the pile is completely inserted into the soil, the motor D is started in reverse, and the hydraulic cylinder drives the breaker bar downward relative to the casing, causing the ring D to drive the spiral pieces B and C to stretch axially, reducing the outer diameter to the outer diameter of spiral piece A. The electric push rod is then activated to release the synchronization lock of the synchronizing rod on slides A and B. Finally, the motor A is started to drive the drilling mechanism upward through slide A to separate from the pile.

[0017] Compared to traditional pipe pile construction equipment, the present invention uses spiral blades A, B, and C on the casing to extend through the middle of the pipe pile to drill a hole in the ground before the pipe pile is drilled, and the soil produced by the drilling is discharged upward through spiral blades A and B. The outer diameters of spiral blades B and C are equal to or greater than the outer diameter of the pipe pile after they are exposed from under the pipe pile. Spiral blades C and B drill a pile hole in the soil layer with a diameter equal to or greater than the outer diameter of the pipe pile, so that the pipe pile will not encounter resistance or encounter less resistance during the process of inserting into the soil layer. In addition, the equipment that applies pressure to the pipe pile only needs less pressure to insert the pipe pile into the soil layer, reducing the cost of the pressure equipment. In addition, the pipe pile will not crack because the pressure exerted on it by the less powerful pressure equipment is less, protecting the pipe pile from damage.

[0018] The outer diameters of the spiral pieces B and C in the present invention can be reduced after the drilling is completed and can be taken out through the middle of the pile, which is convenient and flexible to use.

[0019] In addition, the breaker bar of the present invention can effectively break the rocks encountered during the drilling of the soil layer by the spiral pieces B and C, thereby improving the drilling efficiency. The present invention has a simple structure and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the present invention and its cross-sectional schematic diagram.

[0021] Figure 2 It is a cross-sectional schematic diagram of the driving structure of slide A and slide B in the present invention.

[0022] Figure 3 It is a schematic cross-sectional view of the upper and lower end structures of the present invention.

[0023] Figure 4 It is a schematic diagram of the structure of spiral sheet A, spiral sheet B and spiral sheet C on the casing.

[0024] Figure 5 This is a structural diagram of slide A and slide B.

[0025] The following are the names of the following symbols: 1. Base; 2. Column; 3. Side support; 5. Top seat; 6. Slide A; 7. Circular groove; 8. Slide B; 9. Slot; 10. Ring A; 11. Connecting rod; 12. Flange; 13. Synchronous rod; 14. Electric push rod; 16. Bolt; 17. Wire rope A; 18. Winding wheel A; 19. Motor A; 20. Motor B; 21. Winding wheel B; 22. Wire rope B; 23. Wire rope C; 24. Winding wheel C; 25. Electric Machine C; 26. Ring sleeve B; 27. Gear A; 28. Gear B; 29. ​​Motor D; 30. Hydraulic cylinder; 31. Drive rod; 32. Connector; 33. Breaker rod; 34. Casing; 35. Spiral piece A; 36. Spiral piece B; 37. Slide; 38. Reinforcement rod; 39. Ring sleeve C; 40. Ring sleeve D; 41. Ring cam; 42. Return spring; 43. Digging tooth; 44. Spiral piece C; 45. Elastic plate; 46. Pipe pile; 47. Drilling mechanism. DETAILED DESCRIPTION

[0026] The accompanying drawings are schematic diagrams of the present invention to facilitate understanding of the structural operation principle. The specific product structure and proportional dimensions can be determined according to the use environment and conventional technology.

[0027] like Figure 1 、 2 As shown, it includes a base 1, a column 2, a slide A6, a slide B8, a motor A19, a motor B20, and a drilling mechanism 47, wherein the column 2 of the base 1 is nested and slidably with a slide A6 driven by the motor A19 for installing the drilling mechanism 47 and a slide B8 driven by the motor B20 for installing the pipe pile 46 nested with the drilling mechanism 47; the slide A6 and the slide B8 located below it have a structure for synchronously locking the two.

[0028] like Figure 3 、 4As shown, the drilling mechanism 47 includes a breaker rod 33, a casing 34, a spiral piece A35, a spiral piece B36, a ring D40, a return spring 42, and a digging tooth 43, wherein Figure 3 、 4 5, wherein the ring sleeve B26 rotates with the circular groove 7 on the slide A6, the ring sleeve B26 is driven to rotate by the motor D29, and the ring sleeve B26 is connected to the sleeve 34 by the bolt 16, and the sleeve 34 is installed with a spiral piece A35, the outer diameter of the spiral piece A35 is smaller than the inner diameter of the pipe pile 46, the lower end of the spiral piece A35 is connected with a spiral piece B36 with a variable outer diameter and pitch, and the lower end of the spiral piece B36 is installed with a digging tooth 43; the lower end of the sleeve 34 is nested with a sliding ring sleeve D40 connected to the lower end of the spiral piece B36; a breaker rod 33 with a sharp angle at its lower end is driven by the hydraulic cylinder 30 on the slide A6 and slides axially in the sleeve 34; a reset spring 42 is matched between the breaker rod 33 and the ring sleeve D40.

[0029] like Figure 3 、 4 As shown, a number of vertically distributed ring sleeves C39 are nested in the annular groove on the outside of the sleeve 34, and a horizontal reinforcing rod 38 is installed on each ring sleeve C39. The reinforcing rod 38 slides in the inner wall groove 37 of the spiral piece B36; the lowermost ring sleeve C39 rotates with the ring sleeve D40.

[0030] like Figure 4 As shown, a spiral piece C44 having a spiral angle of 180 degrees and the same pitch as the spiral piece B36 is installed on the two lowermost ring sleeves C39 corresponding to the spiral piece B36 through two reinforcing rods 38; the lower end of the spiral piece C44 is flush with the lower end of the spiral piece B36 and is symmetrical with the center of the spiral piece B36; the two reinforcing rods 38 corresponding to the spiral piece C44 radially slide in the two sliding grooves 37 on the inner wall of the spiral piece C44; and a plurality of digging teeth 43 are installed at the lower end of the spiral piece C44.

[0031] like Figure 3 、 4 As shown, an elastic plate 45 is installed on the outer side of the middle part of the spiral piece B36 to compact the hole wall drilled by the spiral piece B36.

[0032] like Figure 3 As shown, the return spring 42 is located in the annular groove on the inner wall of the ring sleeve D40; the return spring 42 is a compression spring; one end of the return spring 42 is connected to the inner wall of the annular groove, and the other end is connected to the annular protrusion 41 on the breaking rod 33.

[0033] like Figure 3 、 5As shown, the slide B8 has a ring sleeve A10 that allows the spiral piece A35, the spiral piece B36 and the spiral piece C44 to pass vertically upward; the lower end of the ring sleeve A10 is connected to the flange 12 through a number of connecting rods 11 evenly distributed circumferentially, and the flange 12 at the lower end of the connecting rod 11 is connected to the prefabricated flange 12 at the upper end of the pipe pile 46 through bolts 16; the flange 12 at the lower end of the ring sleeve B26 is connected to the flange 12 at the upper end of the sleeve 34 through bolts 16; the upper end of the breaker rod 33 is connected to the drive rod 31 driven by the hydraulic cylinder 30 through a detachable and rotatable connector 32.

[0034] like Figure 1 、 2 As shown in Figure 3, the base 1 is equipped with three side branches 3 for reinforcing the support of the column 2; the motor A19 and the motor B20 are installed on the top seat 5 on the top of the column 2; the top seat 5 is equipped with a winding wheel A18 driven by the motor A19 and a winding wheel B21 driven by the motor B20; the wire rope A17 wound around the winding wheel A18 is connected to the slide A6, and the wire rope B22 wound around the winding wheel B21 is connected to the slide B8 through the rope hole on the slide A6; the ring sleeve B26 is equipped with a gear A27, and the gear A27 is engaged with the gear B28 on the output shaft of the motor D29.

[0035] like Figure 3 、 5 As shown, a synchronization rod 13 is fixed to the lower end of the slide A6 and cooperates with the slot 9 at the upper end of the slide B8. The limiting groove on the side wall of the synchronization rod 13 cooperates with the electric push rod 14 installed in the movable groove on the inner wall of the slot 9.

[0036] like Figure 2 、 3 As shown, a motor C25 and a winding wheel C24 driven by the motor C25 are installed on the base 1; the wire rope C23 wound around the winding wheel C24 is connected to the slide B8.

[0037] like Figure 1 、 2As shown in Figure 3, the construction method is as follows: 1. Insert the drilling mechanism 47 into the pipe pile 46 from the end thereof. 2. Insert the synchronization rod 13 at the lower end of the slide A6 into the slot 9 on the slide B8 and lock the synchronization rod 13 via the electric push rod 14, so that the slide A6 and the slide B8 are locked synchronously. Start the motors A19, B20, and C25 to drive the slides A6 and B8 to move synchronously upward to the top of the column 2. 3. After the drilling mechanism 47 and the pipe pile 46 are lifted simultaneously by a crane, the breaker rod 33 passes through the ring sleeve A10 and the ring sleeve B26 from bottom to top and is connected to the drive rod 31 via the connector 32. The flange 12 at the upper end of the sleeve 34 is connected to the flange 12 at the lower end of the ring sleeve B26 via bolts 16. At the same time, the prefabricated flange 12 at the upper end of the pipe pile 46 is connected to the flange 12 at the lower end of the connecting rod 11 on the ring sleeve A10 via bolts 16. 4. Start motors A19 and B20 to naturally release wire ropes A17 and B22, causing pile 46 and drilling mechanism 47 to move downward synchronously. Simultaneously, start motor D29, which drives drilling mechanism 47 to rotate and drill a hole in the soil. Pile 46 follows screw blade B36 of drilling mechanism 47 into the hole. 5. When drilling mechanism 47 encounters a rock in the soil, it reciprocates hydraulic cylinder 30, which drives breaker rod 33 in a small, high-frequency reciprocating motion in the vertical direction, quickly and effectively breaking the rock. 6. After the pipe pile 46 has completely entered the soil layer, start the motor D29 in the reverse direction, and then drive the breaker rod 33 to move downward relative to the casing 34 through the hydraulic cylinder 30, so that the ring D40 drives the spiral piece B36 and the spiral piece C44 to axially stretch and reduce the outer diameter to the outer diameter of the spiral piece A35; then start the electric push rod 14 to release the synchronous lock of the synchronous rod 13 on the slide A6 and the slide B8, and finally start the motor A19 to drive the drilling mechanism 47 to move upward through the slide A6 to disengage from the pipe pile 46.

[0038] The lower end of the pipe pile 46 has an inner conical surface that facilitates the elastic plate 45 on the spiral piece B36 to enter the pipe pile 46.

[0039] The present invention's workflow: In its initial state, drilling mechanism 47 is not inserted into pipe pile 46 and is mounted on slide A6. Spirals B36 and C44 in drilling mechanism 47 are in their natural state, their outer diameters equal to that of pipe pile 46. Ring D40 abuts the lower end of sleeve 34, return spring 42 is compressed, and all rings C39 abut axially in sequence. Synchronizing rod 13 at the lower end of slide A6 is inserted into slot 9 on slide B8 and locked by electric push rod 14, resulting in synchronized locking of slides A6 and B8.

[0040] When the present invention is used to insert a pipe pile 46 into a soil layer, the drilling mechanism 47 is first inserted horizontally into the pipe pile 46 from the end thereof by auxiliary equipment, so that the flange 12 end of the casing 34 and the connecting piece 32 end of the breaker rod 33 are exposed from the pipe pile 46.

[0041] Start motor A19, motor B20 and motor C25. Motor C25 drives winding wheel C24 to release wire rope C23. Motor A19 and motor B20 wind wire rope A17 and wire rope B22 respectively. Wire rope A17 and wire rope B22 jointly drive slide A6 and slide B8 to move upward synchronously to the top of column 2.

[0042] After the drilling mechanism 47 and the pipe pile 46 are hoisted simultaneously by a crane, the breaker rod 33 is sequentially passed through the annulus A10 and the annulus B26 from bottom to top and connected to the drive rod 31 via the connector 32. The flange 12 at the upper end of the casing 34 is connected to the flange 12 at the lower end of the annulus B26 via bolts 16. Simultaneously, the prefabricated flange 12 at the upper end of the pipe pile 46 is connected to the flange 12 at the lower end of the connecting rod 11 on the annulus A10 via bolts 16. During the installation of the drilling mechanism 47 and the pipe pile 46, the relative axial position of the drilling mechanism 47 and the pipe pile 46 is adjusted by activating the hydraulic cylinder 30 so that the spiral blade B36 in the drilling mechanism 47 just exposes the lower end of the pipe pile 46.

[0043] Then, motors A19, B20, C25, and D29 are simultaneously activated. Motors A19 and B20 drive winding wheels A18 and B21 to naturally unwind wire ropes A17 and B22, respectively. Sliders A6 and B8 move downward synchronously with pile 46 and drilling mechanism 47 under the weight of the pile 46 and drilling mechanism 47. Motor C25 drives winding wheel C24 to rewind wire rope C23. The motor D29 drives the breaker rod 33, casing 34, spiral piece A35, spiral piece B36, spiral piece C44, and collar D40 to rotate synchronously relative to the pipe pile 46 through the gear B28, gear A27, and collar B26. The spiral piece B36 and the spiral piece C44 quickly drill holes in the soil layer through the end digging teeth 43 and discharge the soil produced by the drilling upward through the spiral piece B36 and the spiral piece A35. At the same time, the pipe pile 46 follows the spiral piece B36 of the drilling mechanism 47 into the drilled hole.

[0044] When the breaker rod 33 in the drilling mechanism 47 encounters a stone in the soil layer and the drilling mechanism 47 moves downward slowly, the hydraulic cylinder 30 is started reciprocatingly. The hydraulic cylinder 30 drives the breaker rod 33 to move back and forth axially with a small amplitude and high frequency relative to the casing 34 through the driving rod 31 and the connecting piece 32 to quickly and effectively break the stone. At the same time, the breaker rod 33 reciprocates and compresses the return spring 42 through the annular protrusion 41. The spiral pieces B36 and C44 are blocked by the soil layer, so that the ring sleeve D40 does not produce axial movement or moves very little relative to the casing 34.

[0045] After the stone is completely broken, the obstruction to the drilling mechanism 47 is removed, and spirals B36 and C44 continue to drill deeper. After the pile 46 is completely inserted into the soil layer and the soil generated in the drilled hole is completely discharged, the motor D29 is started in the reverse direction, and the hydraulic cylinder 30 drives the breaker rod 33 downward relative to the casing 34. The breaker rod 33 drives the axial extension of spirals B36 and C44 through the return spring 42, the ring D40, the ring C39 and the reinforcing rod 38, so that the outer diameter of spirals B36 and C44 is reduced to the outer diameter of spiral A35.

[0046] Start the electric push rod 14 to release the synchronous lock of the slide A6 and the slide B8 by the synchronization rod 13, and start the motor A19 to drive the drilling mechanism 47 to move upward through the slide A6 to disengage the pipe pile 46 and the ring sleeve A10, thereby completing the insertion of the pipe pile 46 into the soil layer.

[0047] During the drilling process of the drilling mechanism 47, the motor C25 drives the winding wheel C24 to rewind the wire rope C23, which can apply downward pressure to the drilling mechanism 47 when the drilling mechanism 47 encounters a harder soil layer, making it easier for the drilling mechanism 47 to drill the harder soil layer quickly and effectively.

[0048] After the drilling mechanism 47 is completely separated from the collar A10 and the pile 46, the hydraulic cylinder 30 is activated to extend and drive the breaker rod 33 to axially reset relative to the casing 34. The collar D40 and all the collars C39 are axially reset under the restoring elastic force of the spirals B36 and C44. The drilling mechanism 47 can then be removed from the collar B26 and the drive rod 31 using a crane.

[0049] Finally, the starting motor A19 drives the winding wheel A18 to release the wire rope A17, the slide A6 falls and finally drives the synchronization rod 13 to be inserted into the slot 9 on the slide B8, and the electric push rod 14 is started to lock the synchronization rod 13.

[0050] In summary, the present invention has the following beneficial effects: The present invention extends spirals A35, B36, and C44 on casing 34 through the middle of pipe pile 46 to drill a hole in the ground prior to pipe pile 46, and discharges the resulting soil upward through spirals A35 and B36. The outer diameters of spirals B36 and C44 are equal to or greater than the outer diameter of pipe pile 46 after they protrude from beneath pipe pile 46 to expose it. Spirals C44 and B36 drill a pile hole in the soil layer with a diameter equal to or greater than the outer diameter of pipe pile 46, thereby ensuring that pipe pile 46 encounters no or minimal resistance during insertion into the soil. This allows the equipment applying pressure to pipe pile 46 to insert it into the soil layer with only minimal pressure, thereby reducing the cost of the pressure-applying equipment. Furthermore, due to the less powerful pressure applied to pipe pile 46 by the less powerful pressure-applying equipment, cracks do not occur on pipe pile 46, protecting it from damage.

[0051] The outer diameters of the spiral pieces B36 and C44 of the present invention can be reduced after the drilling is completed and can be taken out through the middle of the pipe pile 46, which is convenient and flexible to use.

[0052] In addition, the breaker rod 33 in the present invention can effectively break the rocks encountered during the process of the spiral pieces B36 and C44 drilling the soil layer, thereby improving the drilling efficiency.

Claims

1. A prestressed high-strength concrete pipe pile construction equipment, characterized by: It includes a base, a column, a slide A, a slide B, a motor A, a motor B, and a drilling mechanism. The column of the base is nested with a slide A driven by the motor A for mounting the drilling mechanism, and a slide B driven by the motor B for mounting a pipe pile nested with the drilling mechanism. The slide A and the slide B located below it have a structure for synchronously locking the two. The drilling mechanism includes a breaker rod, a casing, a spiral piece A, a spiral piece B, a ring sleeve D, a reset spring, and a digging tooth, wherein the ring sleeve B is rotatably matched with the circular groove on the slide A, the ring sleeve B is driven to rotate by the motor D, and the ring sleeve B is connected to the casing by a bolt. The casing is equipped with a spiral piece A, the outer diameter of the spiral piece A is smaller than the inner diameter of the pipe pile, the lower end of the spiral piece A is connected to a spiral piece B with a variable outer diameter and pitch, and the lower end of the spiral piece B is equipped with a digging tooth; the lower end of the casing is nested with a sliding ring sleeve D connected to the lower end of the spiral piece B; a breaker rod with a sharp angle at its lower end is axially slid in the casing and driven by the hydraulic cylinder on the slide A; a reset spring is matched between the breaker rod and the ring sleeve D.

2. The prestressed high-strength concrete pipe pile construction equipment according to claim 1, characterized in that: Several vertically distributed ring sleeves C are nested in the annular groove on the outer side of the sleeve. A horizontal reinforcing rod is installed on each ring sleeve C, and the reinforcing rod slides in the sliding groove on the inner wall of the spiral piece B; the lowermost ring sleeve C rotates with the ring sleeve D.

3. The prestressed high-strength concrete pipe pile construction equipment according to claim 2, characterized in that: The two ring sleeves C at the lower end corresponding to the spiral piece B are installed with a spiral piece C with a spiral angle of 180 degrees and the same pitch as the spiral piece B through two reinforcing rods; the lower end of the spiral piece C is flush with the lower end of the spiral piece B and is symmetrical with the center of the spiral piece B; the two reinforcing rods corresponding to the spiral piece C radially slide in the two sliding grooves on the inner wall of the spiral piece C; the lower end of the spiral piece C is installed with a plurality of digging teeth.

4. The prestressed high-strength concrete pipe pile construction equipment according to claim 1, characterized in that: An elastic plate is installed on the outer side of the middle part of the spiral piece B to compact the hole wall drilled therein.

5. The prestressed high-strength concrete pipe pile construction equipment according to claim 1, characterized in that: The reset spring is located in the annular groove on the inner wall of the ring sleeve D; the reset spring is a compression spring; one end of the reset spring is connected to the inner wall of the annular groove, and the other end is connected to the annular protrusion on the breaking rod.

6. The prestressed high-strength concrete pipe pile construction equipment according to claim 3, characterized in that: The slide B is provided with a ring sleeve A that allows spiral pieces A, B and C to pass vertically upward; the lower end of the ring sleeve A is connected to a flange through a number of connecting rods evenly distributed circumferentially, and the flange at the lower end of the connecting rod is connected to the prefabricated flange at the upper end of the pipe pile by bolts; the flange at the lower end of the ring sleeve B is connected to the flange at the upper end of the casing by bolts; the upper end of the breaking rod is connected to the driving rod driven by the hydraulic cylinder through a detachable and rotatable connecting piece.

7. The prestressed high-strength concrete pipe pile construction equipment according to claim 1, characterized in that: The base is equipped with three side supports for strengthening the support of the column; motor A and motor B are installed on the top seat at the top of the column; a winding wheel A driven by motor A and a winding wheel B driven by motor B are installed on the top seat; the wire rope A wound on the winding wheel A is connected to the slide A, and the wire rope B wound on the winding wheel B passes through the rope hole on the slide A and is connected to the slide B; a gear A is installed on the ring sleeve B, and the gear A is engaged with the gear B on the output shaft of the motor D.

8. The prestressed high-strength concrete pipe pile construction equipment according to claim 1, characterized in that: A synchronization rod is fixed at the lower end of the slide A and cooperates with the slot at the upper end of the slide B. The limiting groove on the side wall of the synchronization rod cooperates with the electric push rod installed in the movable groove on the inner wall of the slot.

9. The prestressed high-strength concrete pipe pile construction equipment and construction method according to claim 1, characterized in that: A motor C and a winding wheel C driven by the motor C are installed on the base; a steel wire rope C wound around the winding wheel C is connected to the slide B.

10. The construction method of the prestressed high-strength concrete pipe pile construction equipment according to claim 6, characterized in that:

1. Insert the drilling mechanism into the pile from the end of the pile; 2. Insert the synchronization rod at the lower end of slide A into the slot on slide B and lock the synchronization rod through the electric push rod, so that slide A and slide B are locked synchronously, start motor A, motor B and motor C to drive slide A and slide B to move upward synchronously to the top of the column; 3. After the drilling mechanism and the pile are lifted at the same time by the crane, the breaking rod passes through the ring sleeve A and the ring sleeve B from bottom to top and is connected to the driving rod through the connecting piece, and the flange at the upper end of the casing is connected to the flange at the lower end of the ring sleeve B by bolts. At the same time, the prefabricated flange at the upper end of the pile is connected to the flange at the lower end of the connecting rod on the ring sleeve A by bolts; 4. Start motor A and motor B to naturally release the wire rope A and wire rope B, and the pile and drill are connected. The drilling mechanism moves downward synchronously, and the motor D is started at the same time. The motor D drives the drilling mechanism to rotate and drill the soil layer, and the pipe pile enters the borehole following the spiral piece B of the drilling mechanism; 5. When the drilling mechanism encounters stones in the soil layer, the hydraulic cylinder is started back and forth, and the hydraulic cylinder drives the breaking rod to move back and forth in a small amplitude and high frequency in the vertical direction to quickly and effectively crush the stones; 6. After the pipe pile has completely entered the soil layer, the motor D is started in the reverse direction, and the breaking rod is driven by the hydraulic cylinder to move downward relative to the casing, so that the ring sleeve D drives the spiral pieces B and spiral pieces C to stretch axially to reduce the outer diameter to the outer diameter of the spiral piece A; then the electric push rod is started to release the synchronous lock of the synchronous rod on the slide A and slide B, and finally the motor A is started to drive the drilling mechanism to move upward through the slide A to separate from the pipe pile.

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