Steel pipe pile sinking equipment and pile sinking method thereof

Abstract

The invention discloses steel pipe pile sinking equipment and a pile sinking method thereof, and belongs to the technical field of engineering construction. The pile sinking equipment comprises a pile sinking vehicle, and a pile sinking assembly and a jet flow assembly are arranged on the pile sinking vehicle; the pile sinking assembly comprises a drilling tool vertical frame, a lifting platform is arranged on the drilling tool vertical frame, a drilling rod, a driving motor and a steel pipe chuck are arranged on the lifting platform, and the jet flow assembly comprises a jet flow source, a jet flow channel and a jet flow hole. The pile sinking method comprises the steps that S1, the lifting platform descends, the drill rod drills holes, the steel pipe chuck pushes the steel pipe downwards, if a hard soil layer or a clay layer is encountered, the jet flow source is started, and high-pressure fluid cuts hard soil or clay; s2, after the steel pipe is flush with the ground, the pile sinking vehicle is driven away; s3, the reinforcement cage is hoisted into the steel pipe; and S4, grouting is conducted in the steel pipe. Hard soil or clay is jetted and cut through high-pressure fluid, drilling can be rapidly conducted in cooperation with a drill bit, the drilling efficiency can be improved, energy consumption improvement and motor output power improvement of a driving motor are relieved, and the situation that the service life of the motor is shortened due to overheating of the driving motor is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of engineering construction, and in particular to a steel pipe pile sinking device and a pile sinking method thereof. Background Art

[0002] Pile foundation is a common foundation structure for buildings such as roads, bridges, and buildings, and steel pipe piles are a type of pile foundation. The main methods of steel pipe pile driving are bored pile driving, static pressure pile driving, and vibration pile driving. Among them, vibration pile driving requires large-scale vibration machinery with large vibration force, which has a great impact on the safety of surrounding structures. Although static pressure pile driving has little impact on the safety of surrounding structures, its hole-making efficiency is low. Although bored pile driving has relatively less disturbance and a high hole-making efficiency, when used in clay layers or hard soil layers, the viscosity of the clay layer and the hardness of the hard soil layer will reduce the drill bit speed. If you want to increase the drill bit speed, you need to increase the motor torque, which will not only significantly increase the power consumption, but also significantly increase the motor temperature, causing the motor to overheat and affect the motor service life. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned technical problems and to provide a steel pipe pile driving device and a pile driving method thereof. When the drill bit drills into the hard soil layer or clay layer, the jet source is started and the high-pressure fluid can be sprayed out from the jet hole to perform jet cutting on the hard soil or clay. The drill bit can be used to drill holes quickly, thereby improving the drilling efficiency and slowing down the increase in energy consumption of the drive motor and the increase in the motor output power, thereby avoiding overheating of the drive motor and reducing the service life of the motor.

[0004] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention discloses a steel pipe pile driving device, comprising a pile driving vehicle, the pile driving vehicle is provided with a pile driving assembly and a jet assembly; the pile driving assembly comprises a drill tool stand, the drill tool stand is provided with a lifting platform that can be raised and lowered, the lifting platform is provided with a drill rod, a driving motor for driving the drill rod to rotate, and a steel pipe chuck for clamping a steel pipe, the steel pipe chuck is provided with a through hole for the drill rod to pass through coaxially, the through hole is coaxially arranged with the steel pipe clamped by the steel pipe chuck, a spiral blade is provided on the rod wall of the drill rod, a drill bit is provided at the bottom of the drill rod, and the drill rod has a drill rod length that enables the drill bit to extend out of the steel pipe; the jet assembly comprises a jet source, a jet channel arranged in the drill rod, and a jet hole arranged on the peripheral wall of the drill bit, one end of the jet channel is connected to the jet hole, and the other end of the jet channel is connected to the jet source, and the jet source comprises a high-pressure water source and / or a high-pressure gas source.

[0005] Preferably, the high-pressure water source includes a water storage tank and a pressure pump, the water storage tank is connected to the jet channel through the pressure pump, and the high-pressure air source includes a high-pressure air pump, and the high-pressure air pump is connected to the jet channel.

[0006] Preferably, a connecting channel is provided in the drill bit, the jet hole is communicated with the jet channel via the connecting channel, and the connecting channel is arranged to be inclined downward.

[0007] Preferably, the lifting platform is slidably connected to the drilling tool stand, the drilling tool stand is provided with a driving mechanism for driving the lifting platform, and the drill rod is rotatably connected to the lifting platform.

[0008] Preferably, the driving mechanism includes a driving pulley group or a driving sprocket group; the driving pulley group includes a driven pulley and a driving pulley respectively arranged at the top and bottom ends of the drilling tool stand, the driven pulley and the driving pulley are sleeved with a driving belt, and the lifting platform is fixed on the driving belt; the driving sprocket group includes a driven sprocket and a driving sprocket respectively arranged at the top and bottom ends of the drilling tool stand, the driven sprocket and the driving sprocket are meshed with a driving chain, and the lifting platform is fixed on the driving chain.

[0009] Preferably, the jet channel is connected to the jet source through an air injection hose, and the air injection hose and the jet channel are rotatably connected through a bearing.

[0010] Preferably, a driving gear and a driven gear meshing with each other are provided in the lifting platform, the drill rod is coaxially fixed on the driven gear, and the driving gear is coaxially fixedly connected to the output shaft of the driving motor.

[0011] Preferably, the steel pipe chuck includes a clamp and a main body provided with the through hole, the through hole includes a first step hole, a second step hole and a third step hole with increasing diameters, the first step hole, the second step hole and the third step hole are arranged in sequence from one end to the other end of the main body, the first step hole is connected to the rotating hole, the diameter of the second step hole is smaller than the steel pipe, the diameter of the third step hole is larger than the steel pipe, the clamp includes an arc plate and a telescopic cylinder circumferentially arranged on the third step hole, and the piston rod of each of the telescopic cylinders is connected to one of the arc plates.

[0012] Preferably, the pile driving vehicle is provided with an angle adjustment mechanism for adjusting the inclination angle of the drilling tool stand, the angle adjustment mechanism includes a hinge support and a hydraulic cylinder, the drilling tool stand includes a first hinged part for hinged connection of the piston rod of the hydraulic cylinder and a second hinged part for hinged connection of the hinge support, the first hinged part and the second hinged part are distributed up and down.

[0013] A steel pipe pile sinking method is also disclosed, which uses the above-mentioned steel pipe pile sinking equipment and comprises the following steps:

[0014] S1. The steel pipe chuck clamps the steel pipe, the pile driving vehicle moves to the vicinity of the area to be piled, the drill bit is aligned with the area to be piled, the drive motor is turned on to drive the drill rod to rotate, the lifting platform descends, and the drill bit drills holes in the area to be piled. The steel pipe chuck pushes down the steel pipe. If the drill bit encounters a hard soil layer or a clay layer during the drilling process, the jet source is turned on, and the jet hole on the drill bit sprays high-pressure fluid to cut the hard soil or clay;

[0015] S2, after the top of the steel pipe is flush with the ground of the area to be piled, the lifting platform rises, the drill rod is separated from the steel pipe, and the pile driving vehicle drives away from the area to be piled;

[0016] S3, vertically hoisting the steel cage into the steel pipe;

[0017] S4. Grouting is performed into the steel pipe.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] In the present invention, when the drill bit drills into a hard soil layer or a clay layer, the jet source can be started, and the high-pressure fluid is injected into the drill bit through the jet channel of the drill rod, and then sprayed out from the jet hole to perform jet cutting on the hard soil or clay. The drill bit can be used to drill holes quickly, thereby improving the drilling efficiency, slowing down the increase in energy consumption of the drive motor and the increase in the motor output power, and avoiding overheating of the drive motor and reducing the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the steel pipe pile driving equipment in the embodiment;

[0022] Figure 2 is a schematic cross-sectional structural diagram of a pile driving assembly in an embodiment;

[0023] Figure 3 is a schematic cross-sectional structural diagram of a drill rod in an embodiment;

[0024] Figure 4 Schematic diagram of the cross-sectional structure of the steel pipe clamp in the embodiment;

[0025] Figure 5 is a schematic diagram of the process of drilling and sinking pipes in the embodiment;

[0026] Figure 6 It is a schematic diagram of the process of the drill rod being separated from the steel pipe in the embodiment;

[0027] Figure 7 It is a schematic diagram of the process of hanging and placing the steel cage in the embodiment;

[0028] Figure 8 It is a schematic diagram of the process after the steel cage is hoisted and placed in the embodiment;

[0029] Fig. 9 It is a schematic diagram of the grouting process in the embodiment.

[0030] Explanation of the reference numerals in the accompanying drawings: 1. pile driving vehicle; 2. drilling tool stand; 3. lifting platform; 4. steel pipe chuck; 5. drill rod; 6. spiral blade; 7. drill bit; 8. jet source; 9. jet channel; 10. jet hole; 11. connecting channel; 12. air injection hose; 13. bearing; 14. guide wheel; 15. driving gear; 16. driven gear; 17. driving motor; 18. first step hole; 19. second step hole; 20. third step hole; 21. telescopic cylinder; 22. arc plate; 23. hinge support; 24. hydraulic cylinder; 25. steel pipe; 26. drilling hole; 27. steel cage; 28. cement mortar. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example 1

[0033] This embodiment provides a steel pipe pile sinking device, such as Figures 1 to 9As shown, the pile driving vehicle 1 includes a pile driving assembly and a jet assembly. The pile driving assembly includes a drill stand 2, and a lifting platform 3 is provided on the drill stand 2. The lifting platform 3 can be lifted and lowered. A steel pipe chuck 4, a drill rod 5 and a driving motor 17 are provided on the lifting platform 3. The steel pipe chuck 4 is provided with a through hole, through which the drill rod 5 can pass through the steel pipe chuck 4, and the drill rod 5 needs to be coaxially arranged with the through hole. The steel pipe chuck 4 is used to clamp the steel pipe 28, and the through hole is coaxially arranged with the steel pipe 28 clamped on the steel pipe chuck 4, so that the steel pipe 28 can be coaxially sleeved on the outside of the drill rod 5. The driving motor 17 is used to drive the drill rod 5 to rotate around the axis of the drill rod 5. A spiral blade 6 is provided on the rod wall of the drill rod 5, and the spiral blade 6 extends along the axis direction of the drill rod 5. The spiral blade 6 can lift the soil in the borehole 26 out of the borehole 26 during the rotation of the drill rod 5. A drill bit 7 is provided at the end of the drill rod 5, and the drill rod length of the drill rod 5 is to ensure that the drill bit 7 can extend out of the steel pipe 28. The jet assembly includes a jet source 8, a jet channel 9 and a jet hole 10. The jet source 8 is arranged on the pile driving vehicle 1. The jet channel 9 is arranged in the drill rod 5, and the jet channel 9 extends to both ends of the drill rod 5 along the axis of the drill rod 5, and the jet hole 10 is arranged on the peripheral wall of the drill bit 7. One end of the jet channel 9 is connected to the jet hole 10, and the other end of the jet channel 9 is connected to the jet source 8. The jet source 8 includes a high-pressure water source or a high-pressure gas source, or a high-pressure water source and a high-pressure gas source are equipped at the same time, and switched for use as needed.

[0034] Working principle:

[0035] First, the pile driving vehicle 1 enters the work site and clamps the top of the steel pipe 25 with the steel pipe clamp 4; then, the pile driving vehicle 1 drives to the vicinity of the area to be piled and aligns the drill bit 7 with the area to be piled; then, the driving motor 17 is started to drive the drill rod 5 to rotate, and the lifting platform 3 descends to drive the drill rod 5 and the steel pipe 25 to descend, and the area to be piled is drilled by the drill bit 7, and at the same time, the steel pipe 25 is sunk into the borehole 26. During the drilling process, when the drill bit 7 encounters harder geology or becomes sticky in the clay layer, the jet source 8 (high-pressure water source or high-pressure gas source) is turned on, and the fluid (high-pressure water flow or high-pressure gas flow) enters the drill rod 5 through the jet channel 9, and then passes through the The jet hole 10 sprays the drill bit 7 to jet-cut the hard soil or clay, and cooperates with the rotation of the drill bit 7 to achieve drilling, so as to delay the increase in energy consumption and motor output power of the drive motor 17, and avoid overheating of the drive motor 17 and reduce the service life of the motor; then, when the top of the steel pipe 25 is flush with the ground of the area to be piled, that is, flush with the top of the borehole 26, the steel pipe clamp 4 releases the steel pipe 25, the lifting platform 3 rises, driving the drill rod 5 to rise and detach from the steel pipe 25, and the pile driving vehicle 1 drives away; then, the steel cage 27 is hoisted and placed into the borehole 26 and the steel pipe 25 by a crane; finally, cement mortar is poured to complete the pile driving of the steel pipe pile.

[0036] In one embodiment, if Figures 1 to 9As shown, the high-pressure water source includes a water tank and a pressure pump. The water tank is connected to the jet channel 9 through the pressure pump. When the pressure pump is turned on, the water in the water tank can be pumped into the jet channel 9 to spray out high-pressure water through the jet hole 10 to cut hard soil or clay. Compared with the air flow, the water flow can also dilute the soil. The high-pressure air source includes a high-pressure air pump. The high-pressure air pump is connected to the jet channel 9. When the high-pressure air pump is turned on, high-pressure air can be sent into the jet channel 9 to spray out high-pressure air flow through the jet hole 10. Preferably, the high-pressure water source and / or high-pressure air source are arranged at the rear of the pile driving vehicle 1 to balance the weight of the pile driving vehicle 1.

[0037] In one embodiment, if Figures 1 to 9 As shown, a connecting channel 11 is provided in the drill bit 7, and the jet hole 10 is connected to the jet channel 9 through the connecting channel 11. The connecting channel 11 is arranged to be inclined downward. The connecting channel 11 is inclined downward, which, on the one hand, allows the water flow or air flow to be ejected downward at a high speed, and on the other hand, is conducive to the discharge of the soil entering the jet hole 10. The number of the connecting channels 11 is consistent with the number of the jet holes 10, and the number of the jet holes 10 is set according to needs.

[0038] In one embodiment, if Figures 1 to 9 As shown, a filter steel mesh is encapsulated at the jet hole 10 to intercept the mud entering the jet hole 10 .

[0039] In one embodiment, if Figures 1 to 9 As shown, the lifting platform 3 is slidably connected to the drilling tool stand 2, the drilling tool stand 2 is provided with a driving mechanism for driving the lifting platform 3, and the drill rod 5 is rotatably connected to the lifting platform 3.

[0040] In one embodiment, if Figures 1 to 9 As shown, the driving mechanism includes a driving pulley group or a driving sprocket group. The driving pulley group includes a driven pulley and a driving pulley, the driven pulley is arranged at the top of the drilling tool stand 2, the driving pulley is arranged at the bottom of the drilling tool stand 2, the driven pulley and the driving pulley are sleeved with a driving belt, and the lifting platform 3 is fixed on the driving belt. The driving sprocket group includes a driven sprocket and a driving sprocket, the driven sprocket is arranged at the top of the drilling tool stand 2, the driving sprocket is arranged at the bottom of the drilling tool stand 2, the driven sprocket and the driving sprocket are meshed with a driving chain, and the lifting platform 3 is fixed on the driving chain.

[0041] In one embodiment, if Figures 1 to 9 As shown, the jet channel 9 is connected to the jet source 8 through the air injection hose 12, and the air injection hose 12 and the jet channel 9 are rotatably connected through a bearing 13 so that the air injection hose 12 does not rotate with the drill pipe 5, so as to avoid the air injection hose 12 being twisted together, so that water or air cannot pass through.

[0042] In one embodiment, if Figures 1 to 9As shown, a guide wheel 14 is provided on the top of the drilling tool stand 2 for guiding the gas injection hose 12. The length of the gas injection hose 12 needs to have a certain margin to ensure that the lifting platform 3 will not tear the gas injection hose 12 when it is lifted up and down on the drilling tool stand 2.

[0043] In one embodiment, if Figures 1 to 9 As shown, the gas injection hose 12 can also be a corrugated telescopic tube, which can be extended and retracted as the lifting platform 3 rises and falls.

[0044] In one embodiment, if Figures 1 to 9 As shown, a driving gear 15 and a driven gear 16 are provided in the lifting platform 3, and the driving gear 15 and the driven gear 16 are meshed with each other. The drill rod 5 is coaxially fixed on the driven gear 16, and the driving gear 15 is coaxially fixedly connected with the output shaft of the driving motor 17. The driving motor 17 drives the driving gear 15 to rotate, and then drives the driven gear 16 to rotate, so as to drive the drill rod 5 to rotate.

[0045] In one embodiment, if Figures 1 to 9 As shown, the steel pipe clamp 4 includes a clamp and a main body with a through hole. The through hole includes a first step hole 18, a second step hole 19 and a third step hole 20 with increasing diameters, and the first step hole 18, the second step hole 19 and the third step hole 20 are arranged in sequence from one end to the other end of the main body. The first step hole 18 is connected to the rotating hole, the diameter of the second step hole 19 is smaller than the steel pipe 25, and the diameter of the third step hole 20 is larger than the steel pipe 25. The clamp includes a telescopic cylinder 21 and an arc plate 22, the telescopic cylinder 21 is circumferentially arranged on the third step hole 20, and the piston rod of each telescopic cylinder 21 is connected to an arc plate 22. When clamping the steel pipe 25, the steel pipe clamp 4 is driven by the lifting platform 3 to descend to the top of the steel pipe 25, so that the third step hole 20 is sleeved outside the steel pipe 25, and the second step hole 19 is against the top of the steel pipe 25, and then the piston rod of the telescopic cylinder 21 is extended, and the arc plate 22 presses the pipe wall of the steel pipe 25, thereby clamping and pressing the steel pipe 25. In the drilling stage, the second step hole 19 can also push down the steel pipe 25, which is conducive to the steel pipe 25 sinking into the drilled hole 26.

[0046] In one embodiment, if Figures 1 to 9 As shown, the pile driving vehicle 1 is provided with an angle adjustment mechanism for adjusting the inclination angle of the drilling tool stand 2. The angle adjustment mechanism includes a hinge support 23 and a hydraulic cylinder 24. The drilling tool stand 2 includes a first hinge part and a second hinge part, and the first hinge part and the second hinge part are distributed up and down. The first hinge part is hinged to the piston rod of the hydraulic cylinder 24, and the cylinder body of the hydraulic cylinder 24 is hinged to the pile driving vehicle 1. The second hinge part is hinged to the hinge support 23.

[0047] Example 2

[0048] This embodiment provides a steel pipe pile sinking method, such as Figures 1 to 9As shown, the steel pipe pile sinking equipment in Example 1 is used, including the following steps:

[0049] S1, the steel pipe chuck 4 clamps the steel pipe 25, the pile driving vehicle 1 moves to the vicinity of the area to be piled, the drill bit 7 is aligned with the area to be piled, the driving motor 17 is turned on to drive the drill rod 5 to rotate, the lifting platform 3 descends, the drill bit 7 drills holes in the area to be piled, the steel pipe chuck 4 pushes down the steel pipe 25, if the drill bit 7 encounters a hard soil layer or a clay layer during the drilling process, the jet source 8 is turned on, and the jet hole 10 on the drill bit 7 sprays high-pressure fluid to cut the hard soil or clay;

[0050] S2, when the top of the steel pipe 25 is flush with the ground of the area to be piled, the lifting platform 3 rises, the drill rod 5 is separated from the steel pipe 25, and the pile driving vehicle 1 drives away from the area to be piled;

[0051] S3, vertically hoist the steel cage 27 into the steel pipe 25 until the bottom of the steel cage 27 touches the bottom of the drill hole 26;

[0052] S4, grouting is performed into the steel pipe 25 until the cement mortar 28 fills the top of the steel pipe 25 (drilled hole 26), completing the steel pipe pile sinking method.

[0053] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A steel pipe pile driving device, characterized in that: The invention comprises a pile driving vehicle, on which a pile driving assembly and a jet assembly are provided; the pile driving assembly comprises a drilling tool stand, on which a lifting platform capable of being raised and lowered is provided, on which a drill rod, a driving motor for driving the drill rod to rotate, and a steel pipe chuck for clamping a steel pipe are provided, the steel pipe chuck is provided with a through hole for coaxially passing the drill rod, the through hole is coaxially arranged with the steel pipe clamped by the steel pipe chuck, a spiral blade is provided on the rod wall of the drill rod, a drill bit is provided at the bottom of the drill rod, and the drill rod has a drill rod length capable of allowing the drill bit to extend out of the steel pipe; the jet assembly comprises a jet source, a jet channel arranged in the drill rod, and a jet hole arranged on the peripheral wall of the drill bit, one end of the jet channel is connected to the jet hole, and the other end of the jet channel is connected to the jet source, and the jet source comprises a high-pressure water source and / or a high-pressure gas source.

2. A steel pipe pile driving device according to claim 1, characterized in that: The high-pressure water source includes a water storage tank and a pressure pump, the water storage tank is connected to the jet channel through the pressure pump, and the high-pressure air source includes a high-pressure air pump, and the high-pressure air pump is connected to the jet channel.

3. The steel pipe pile driving equipment according to claim 1, characterized in that: A connecting channel is provided in the drill bit, the jet hole is communicated with the jet channel through the connecting channel, and the connecting channel is arranged obliquely downward.

4. The steel pipe pile driving equipment according to claim 1, characterized in that: The lifting platform is slidably connected to the drilling tool stand, the drilling tool stand is provided with a driving mechanism for driving the lifting platform, and the drill rod is rotatably connected to the lifting platform.

5. The steel pipe pile driving equipment according to claim 4, characterized in that: The driving mechanism includes a driving pulley group or a driving sprocket group; the driving pulley group includes a driven pulley and a driving pulley respectively arranged at the top and bottom ends of the drilling tool stand, the driven pulley and the driving pulley are sleeved with a driving belt, and the lifting platform is fixed on the driving belt; the driving sprocket group includes a driven sprocket and a driving sprocket respectively arranged at the top and bottom ends of the drilling tool stand, the driven sprocket and the driving sprocket are meshed with a driving chain, and the lifting platform is fixed on the driving chain.

6. The steel pipe pile driving equipment according to claim 3, characterized in that: The jet channel is in communication with the jet source via an air injection hose, and the air injection hose is rotatably connected to the jet channel via a bearing.

7. The steel pipe pile driving equipment according to claim 3, characterized in that: The lifting platform is provided with a driving gear and a driven gear meshing with each other, the drill rod is coaxially fixed on the driven gear, and the driving gear is coaxially fixedly connected with the output shaft of the driving motor.

8. The steel pipe pile driving equipment according to claim 4, characterized in that: The steel pipe chuck includes a clamp and a main body provided with the through hole, the through hole includes a first step hole, a second step hole and a third step hole with increasing diameters, the first step hole, the second step hole and the third step hole are arranged in sequence from one end to the other end of the main body, the first step hole is connected to the rotating hole, the diameter of the second step hole is smaller than the steel pipe, and the diameter of the third step hole is larger than the steel pipe, the clamp includes an arc plate and a telescopic cylinder circumferentially arranged on the third step hole, and the piston rod of each of the telescopic cylinders is connected to one of the arc plates.

9. The steel pipe pile driving equipment according to claim 1, characterized in that: The pile driving vehicle is provided with an angle adjustment mechanism for adjusting the inclination angle of the drilling tool stand, the angle adjustment mechanism includes a hinge support and a hydraulic cylinder, the drilling tool stand includes a first hinge part for hinged connection of the piston rod of the hydraulic cylinder and a second hinge part for hinged connection of the hinge support, the first hinge part and the second hinge part are distributed up and down.

10. A steel pipe pile sinking method, characterized in that: The steel pipe pile driving device according to any one of claims 1 to 8 is used, comprising the following steps: S1. The steel pipe chuck clamps the steel pipe, the pile driving vehicle moves to the vicinity of the area to be piled, the drill bit is aligned with the area to be piled, the drive motor is turned on to drive the drill rod to rotate, the lifting platform descends, and the drill bit drills holes in the area to be piled. The steel pipe chuck pushes down the steel pipe. If the drill bit encounters a hard soil layer or a clay layer during the drilling process, the jet source is turned on, and the jet hole on the drill bit sprays high-pressure fluid to cut the hard soil or clay; S2, after the top of the steel pipe is flush with the ground of the area to be piled, the lifting platform rises, the drill rod is separated from the steel pipe, and the pile driving vehicle drives away from the area to be piled; S3, vertically hoisting the steel cage into the steel pipe; S4. Grouting is performed into the steel pipe.

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