High-frequency pile sinking device suitable for low clearance and construction method

Abstract

The invention discloses a high-frequency pile sinking device suitable for low clearance and a construction method. The device comprises a mounting frame which comprises a supporting column, a support plate and a connecting piece, and the support plate is fixed to the end opposite to the end, connected with a foundation, of the supporting column. The vibration mechanism comprises a high-strength spring set, a mounting shell, a plurality of transmission rods, a plurality of eccentric wheels, a transmission assembly and a driving mechanism, the transmission rods, the eccentric wheels, the transmission assembly and the driving mechanism are arranged in the mounting shell, the high-strength spring set is arranged outside the mounting shell and connected with the support plate, and the transmission rods are sleeved with the eccentric wheels in a one-to-one correspondence mode; the multiple sets of transmission rods are located in the same plane and symmetrically distributed, and the rotating directions of any two symmetrically-distributed transmission rods are opposite. Periodic high-frequency vibration waves cause small disturbance to surrounding soil, and the soil squeezing effect can be effectively reduced. The vibration type pile sinking can reduce the shear stress of the soil body around the pile body, so that the construction speed is obviously improved. And therefore, the device provided by the invention is wider in applicable soil texture range of the foundation.

Description

Technical Field

[0001] The invention relates to the technical field of pile driving, in particular to a high-frequency pile driving device and a construction method suitable for low clearance. Background Art

[0002] As the house grows in service life, there will be some problems with the overall stability and safety of the house, such as uneven settlement of the foundation, damage to the foundation, etc. At this time, the foundation needs to be reinforced to improve the bearing capacity of the foundation. When the use function of the house changes and it needs to add floors or expand, the strength of the foundation should also be strengthened.

[0003] In the prior art, the commonly used technologies for treating weak foundations and strengthening foundations include anchor pile reinforcement and grouting reinforcement. Anchor pile reinforcement often adopts static pressure construction, which uses the pull-out resistance of the anchor to statically press prefabricated piles or steel pipes into the soil body, and improves the original foundation bearing capacity through the pile bearing capacity. It is suitable for the reinforcement of foundation soils such as silt, silty soil, clay, silt and artificial fill. However, there is an obvious soil squeezing effect during the construction of anchor static pressure piles, which cannot be used in sensitive areas. The large end pile resistance leads to limitations in the depth of pile sinking. In addition, most of the static pressure pile drivers on the current market are self-propelled pile drivers, which are large in size, high in cost of use, and inconvenient to operate. Especially when used for the foundation reinforcement of low-rise old buildings, this type of pile driver cannot enter the construction. Therefore, higher requirements are placed on the construction process and construction equipment of anchor piles.

[0004] When the traditional anchor static pile foundation reinforcement technology is applied to indoor areas with low headroom, it has disadvantages such as obvious soil squeezing effect, low construction efficiency, and restrictions on construction machinery. Summary of the invention

[0005] Based on this, it is necessary to provide a high-frequency pile driving device and construction method suitable for low clearance to solve the problems of obvious soil squeezing effect, low construction efficiency and limited construction machinery in traditional anchor static pressure pile foundation.

[0006] The present application provides a high-frequency pile driving device adapted to low clearance, comprising:

[0007] The mounting frame comprises a supporting column, a bracket plate and a connecting piece. The bracket plate is fixed to the opposite end of the supporting column connected to one end of the foundation, and the connecting piece is connected to the side of the bracket plate close to the foundation.

[0008] The vibration mechanism comprises a high-strength spring group, a mounting shell, and multiple groups of transmission rods, multiple groups of eccentric wheels, a transmission assembly and a driving mechanism arranged in the mounting shell. The high-strength spring group is arranged outside the mounting shell and connected to the bracket plate. The multiple groups of eccentric wheels are arranged one by one and sleeved on the multiple groups of transmission rods. The driving mechanism is driven by the transmission assembly to make the multiple groups of transmission rods rotate synchronously. The multiple groups of transmission rods are symmetrically distributed in the same plane, and the rotation directions of any two symmetrically distributed transmission rods are opposite.

[0009] The clamp part is connected and linked with the multiple groups of eccentric wheels.

[0010] The anchor pile is fixed to the clamp part.

[0011] According to an embodiment of the present application, the driving mechanism includes a motor and a motor gear.

[0012] The transmission assembly includes a first transmission assembly and a second transmission assembly.

[0013] The driving mechanism is located between two sets of transmission rods and is connected through the first transmission assembly. The first transmission assembly includes a double gear and a steering gear. The double gear includes a small gear meshing with the motor gear and a large gear meshing with the steering gear. The steering gear is fixed to the end of the transmission rod.

[0014] The second transmission assembly includes a plurality of steering wheel groups, and the plurality of steering wheel groups are respectively arranged between two adjacent transmission rods of the remaining groups for synchronous transmission.

[0015] According to an embodiment of the present application, the number of the multiple groups of transmission rods is 4.

[0016] According to an implementation of the present application, the eccentric wheel is located in the middle of the transmission rod and is fixed and limited by bearings located on both sides of the eccentric wheel.

[0017] According to an embodiment of the present application, it also includes an electric winch, which is located on the support plate, and the connecting member is connected to a steel wire rope of the electric winch.

[0018] According to an embodiment of the present application, a guide rail is further included, wherein the guide rail is sleeved on the support column, and the mounting shell is connected to the guide rail.

[0019] According to an embodiment of the present application, the clamp part includes a clamp body, an electric hydraulic push rod and a clamp, the clamp body has a mounting hole for the anchor pile to be installed and a clamp hole connected to the side of the mounting hole, the clamp is arranged in the clamp hole and connected to the electric hydraulic push rod.

[0020] According to an embodiment of the present application, the clamp is a detachable structure, and the clamp includes clamps that match different pile types.

[0021] According to an embodiment of the present application, a counterweight mechanism is also included, and the counterweight mechanism is a steel base or a precast concrete base.

[0022] The steel base comprises steel and embedded anchor rods, and the steel is fixed to one end of the support column connected to the foundation.

[0023] The precast concrete base comprises a precast concrete block and a pre-embedded connecting piece, and the precast concrete block is fixed to one end of the support column connected to the foundation.

[0024] The present application also provides a low-headroom pile driving construction method, which uses the above-mentioned high-frequency pile driving device to perform pile driving construction.

[0025] The above-mentioned high-frequency pile driving device is suitable for low clearance. Each group of two symmetrically distributed transmission rods rotates to drive the corresponding eccentric wheels to rotate in opposite directions, thus forming synchronous upward and downward forces and offsetting the respective horizontal forces, thereby forming a group of power sources. Multiple groups of transmission rods are multiple groups of power sources, which are synchronously superimposed to generate power. In addition, the energy of the high-strength spring group compressed by the eccentric wheel is released when the eccentric force moves downward, further superimposing the kinetic energy, so it has a greater pile driving ability and a deeper pile driving depth. The periodic high-frequency vibration wave causes less disturbance to the surrounding soil, which can effectively reduce the soil squeezing effect. Vibration pile driving can reduce the shear stress of the soil around the pile body, so that the construction rate is significantly improved. The low disturbance feature makes the device of the present invention applicable to a wider range of foundation soil types. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic structural diagram of a high-frequency pile driving device suitable for low headroom according to an embodiment of the present application;

[0028] Figure 2 A schematic diagram of the internal structure of the vibration mechanism of an embodiment of the present application;

[0029] Figure 3 This is a schematic structural diagram of a clamp portion according to an embodiment of the present application;

[0030] Figure 4 A schematic diagram of the rotation direction of an embodiment of the present application;

[0031] FIG5( a ) is a schematic diagram of the distribution of the exciting force generated by the eccentric wheel in the embodiment of the present application in a plane;

[0032] FIG5( b ) is a schematic diagram of the distribution of the exciting force generated by the eccentric wheel of the embodiment of the present application;

[0033] FIG5( c ) is a schematic diagram of the exciting force generation principle of an embodiment of the present application.

[0034] 11. Support column; 12. Guide rail; 13. Bracket plate; 14. Electric winch; 15. Wire rope; 21. Connector; 22. High-strength spring group; 23. Eccentric wheel; 24. Double gear; 25. Bearing; 26. Transmission rod; 27. Steering gear; 28. Motor; 31. Bolt connector; 32. Electric hydraulic push rod; 33. Removable clamp; 41. Existing structure; 42. Steel base; 43. Embedded anchor rod; 44. Bolt; 51. Anchor pile. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0036] The applicant has found through research that the traditional anchor static pile foundation reinforcement technology has the following disadvantages when applied to indoor areas with low headroom:

[0037] (1) Obvious soil squeezing effect: During the construction of anchor static pressure piles, the surrounding soil deforms and moves due to the squeezing effect of the pile body. As the pile group becomes denser, the soil displacement around the pile body increases, which will cause large lateral displacement and floating of surrounding existing buildings and pipelines. Therefore, it is less suitable for construction environments with dense pipelines.

[0038] (2) Low construction efficiency: During the construction of anchor static piles, the shear stress generated in the soil around the pile body increases with the increase of depth. The greater the resistance of the pile body, the longer the single pile sinking time is, and the pile sinking depth is also limited to a certain extent.

[0039] (3) Construction machinery has limitations: Static pressure piles require a larger power source, which results in most pile driving machinery being larger in size and cannot be used in foundation reinforcement projects with low clearance conditions.

[0040] Based on this, the present application provides a high-frequency pile driving device adapted to low clearance, including a mounting frame, a vibration mechanism, a clamping part and an anchor pile 51. The mounting frame includes a support column 11, a bracket plate 13 and a connecting member 21, wherein the bracket plate 13 is fixed to the opposite end of the support column 11 connected to one end of the foundation, and the connecting member 21 is connected to the side of the bracket plate 13 close to the foundation.

[0041] The device of the present invention is surrounded by a support frame, that is, a mounting frame. The support column 11 includes two ends, one end of which is connected to the foundation to play a role of fixing with the foundation; and the other end is connected to the bracket plate 13.

[0042] In order to ensure the fixing effect of the support column 11, or the stability of the support column 11, in some embodiments, a counterweight mechanism is also included, and the counterweight mechanism is a steel base 42 or a precast concrete base. The steel base 42 includes a steel and a pre-embedded anchor rod 43, and the steel is fixed to one end of the support column 11 connected to the foundation. The precast concrete base includes a precast concrete block and a pre-embedded connector 21, and the precast concrete block is fixed to one end of the support column 11 connected to the foundation.

[0043] The function of the counterweight foundation system is to ensure the stability of the entire device, and can be divided into two types: the first type uses a steel base 42, which includes steel and embedded anchor rods 43, and is suitable for the ground of the existing structure 41 foundation.

[0044] Exemplarily, the base of the entire device is made of steel material, fixed to the existing structure 41 by pre-buried anchor rods 43, and bolts 44 are welded on the steel base 42. For example, a bolt 44 hole is set at the bottom of the support column 11 to connect with the steel base 42, and the upper part of the support column 11 is also connected to the support plate through the bolt 44 hole, thereby forming a support frame that can support and bear loads.

[0045] The second type uses a precast concrete base, which includes precast concrete blocks and embedded connectors 21 and is suitable for muddy ground with poor soil quality.

[0046] For example, if the ground is muddy, the counterweight system of the support frame is two precast concrete blocks, on which bolts 44 are pre-embedded, and can be directly connected to the support column 11 .

[0047] The vibration mechanism includes a high-strength spring group 22, a mounting shell, and multiple groups of transmission rods 26, multiple groups of eccentric wheels 23, a transmission assembly and a driving mechanism arranged in the mounting shell. The high-strength spring group 22 is arranged outside the mounting shell and connected to the bracket plate 13. The multiple groups of eccentric wheels 23 are arranged one by one and sleeved on the multiple groups of transmission rods 26. The driving mechanism is driven by the transmission assembly to make the multiple groups of transmission rods 26 rotate synchronously. The multiple groups of transmission rods 26 are symmetrically distributed in the same plane, and the rotation directions of any two symmetrically distributed transmission rods 26 are opposite. The clamp part is connected and linked with the multiple groups of eccentric wheels 23. The anchor pile 51 is fixed to the clamp part.

[0048] The lower part of the connector 21 is provided with a plurality of holes, which are connected to the high-strength spring group 22. The advantages of the high-strength spring connector 21 are as follows: as a flexible connection, it can reduce the damage of the connector 21 caused by high-frequency vibration; when the pile is vibrated, the eccentric force is upward, and the spring absorbs and stores energy; when the eccentric force is downward, the spring releases energy, further adding kinetic energy.

[0049] In the vibration mechanism, the number of eccentric wheels 23 and transmission rods 26 is the same, and they are fixed one-to-one on the transmission rods 26. The total number of transmission rods 26 is an even number, and all transmission rods 26 are located in the same plane, and are symmetrically arranged in pairs; similarly, the eccentric wheels 23 on the corresponding transmission rods 26 are also symmetrically arranged.

[0050] The driving mechanism can be a motor or an internal combustion engine, which transmits through the transmission assembly to make multiple groups of transmission rods 26 rotate synchronously, driving the corresponding eccentric wheels 23 to rotate. All transmission rods 26 rotate synchronously, and the rotation directions of two symmetrical transmission rods 26 are opposite, and the corresponding eccentric wheels 23 also rotate in opposite directions.

[0051] In some embodiments, the number of the plurality of transmission rods 26 is 4. Taking this as an example, the rotation of the transmission rod 26 and the eccentric wheel 23 is described.

[0052] In general, when the eccentric wheels 23 rotate synchronously downward, a downward force is generated, and when they turn synchronously upward, an upward pulling force is generated, thereby forming a periodic up and down reciprocating motion. The present invention has a total of 4 eccentric wheels 23, all in the same plane. It is assumed that this plane is the XY plane, and the eccentric wheels 23 are numbered. Eccentric wheels No. 1 and No. 3 are a group of vibration sources, and eccentric wheels No. 2 and No. 4 are a group of vibration sources. After the device is working, eccentric wheels No. 1 and No. 3 rotate in the XZ plane. At this time, eccentric wheel No. 1 23 rotates clockwise, and eccentric wheel No. 3 rotates counterclockwise. Eccentric wheels No. 2 and No. 4 rotate in the YZ plane. At this time, eccentric wheel No. 4 rotates clockwise, and eccentric wheel No. 2 23 rotates counterclockwise, such as Figure 4As shown. To further illustrate, the four eccentrics 23 move synchronously. When they move upward synchronously, a negative exciting force F- is generated. When they move horizontally synchronously, the exciting forces cancel each other out to F0. When they move downward synchronously, an exciting force F+ is generated, as shown in FIG5(b). The distribution of the exciting force in the plane is shown in FIG5(a). The anchor pile 51 is located in the middle of the plane. Since each group of eccentrics 23 rotates relatively, the bending moments generated in the process can cancel each other out. A schematic diagram of the periodic exciting wave is shown in FIG5(c).

[0053] The clamp part is connected and linked with the plurality of eccentric wheels 23. If the vibration mechanism is provided with a connecting plate, the connecting plate is driven to move up and down by the eccentric wheel 23. The clamp part is connected and fixed with the vibration mechanism by a bolt connector 31.

[0054] The high-frequency pile driving device adapted to low clearance is characterized in that each group of two symmetrically distributed transmission rods 26 rotate to drive the corresponding eccentric wheels 23 to rotate in opposite directions, thus forming synchronous upward and downward forces and offsetting the respective horizontal forces, thereby forming a group of power sources. Multiple groups of transmission rods 26 are multiple groups of power sources, which are synchronously superimposed to generate power. In addition, the energy of the high-strength spring group 22 compressed by the eccentric wheel 23 is released when the eccentric force moves downward, further superimposing the kinetic energy, so that it has a greater pile driving ability and a deeper pile driving depth. The periodic high-frequency vibration wave causes less disturbance to the surrounding soil, which can effectively reduce the soil squeezing effect. Vibration pile driving can reduce the shear stress of the soil around the pile body, so that the construction rate is significantly improved. The low disturbance feature makes the device of the present invention applicable to a wider range of foundation soil types.

[0055] According to an embodiment of the present application, the driving mechanism includes a motor and a motor gear. The transmission assembly includes a first transmission assembly and a second transmission assembly. The driving mechanism is located between two groups of transmission rods 26 and is connected by the first transmission assembly. The first transmission assembly includes a double gear 24 and a steering gear 27. The double gear 24 includes a small gear meshing with the motor gear and a large gear meshing with the steering gear 27. The steering gear 27 is fixed to the end of the transmission rod 26. The second transmission assembly includes multiple groups of steering wheel groups, which are respectively arranged between two adjacent transmission rods 26 of the remaining groups for synchronous transmission.

[0056] As shown in the figure, a motor is arranged inside the vibration mechanism as a power source. After the motor is powered on, the electrical energy is converted into mechanical energy, and the mechanical energy drives the eccentric wheel 23 to rotate through the transmission mechanism. The motor gear is engaged with the double gear 24, and the upper part of the double gear 24 is a small gear and the lower part is a large gear, such as a bevel gear. The upper small gear is engaged with the motor gear, and the lower bevel gear is engaged with the steering gear 27, and is connected through the transmission rod 26 to transfer kinetic energy. The bevel gear is the same as the steering gear 27, so as to achieve synchronous rotation. This is the transmission process of the first transmission component, which is arranged between the two groups of transmission rods 26 in the lower left corner.

[0057] The second transmission assembly is arranged between the transmission rods 26 of the remaining groups. Each group of steering wheel groups is arranged between two transmission rods 26. The steering wheel group includes two steering gears 27 meshing with each other.

[0058] The transmission assembly of the above structure has a simple structure and high reliability.

[0059] According to the implementation of the present application, the eccentric wheel 23 is located in the middle of the transmission rod 26 and is fixed and limited by bearings 25 located on both sides of the eccentric wheel 23.

[0060] The eccentric wheel 23 is installed in the middle of the transmission rod 26, and bearings 25 are arranged on both sides of the eccentric wheel 23 to play a limiting role. The eccentric wheel 23 of this type has a stable structure and is not prone to axial displacement.

[0061] According to the embodiment of the present application, an electric winch 14 is further included. The electric winch 14 is located on the support plate 13 , and the connecting member 21 is connected to the steel wire rope 15 of the electric winch 14 .

[0062] An electric winch 14 is arranged on the upper part of the support plate, and a steel wire rope 15 is wound around the electric winch 14 to fix the bidirectional high-frequency vibration structure. After the pile is sunk, the device can be lifted to reset. The top opening of the connector 21 is fixed to the steel wire rope 15. This method makes it easy to lift and lower the vibration mechanism.

[0063] According to an embodiment of the present application, a guide rail 12 is further included. The guide rail 12 is sleeved on the support column 11 , and the mounting shell is connected to the guide rail 12 .

[0064] The entire vibration system is connected to the support frame through a connecting plate and a guide rail 12, and the guide rail 12 can limit the vibration device from shaking horizontally.

[0065] According to an embodiment of the present application, the clamp part includes a clamp body, an electric hydraulic push rod 32 and a clamp, the clamp body has a mounting hole for the anchor pile 51 to be installed and a clamp hole connected to the side of the mounting hole, the clamp is arranged in the clamp hole and connected to the electric hydraulic push rod 32.

[0066] The clamp part mainly functions to lock the anchor pile 51 . The hydraulic feature provides a greater gripping force, which can prevent the anchor pile 51 from loosening and falling off. The clamp part comprises an electric hydraulic push rod 32 , a detachable clamp 33 and a connector 21 .

[0067] A hole is left in the middle of the clamp body, and grooves are left on the four sides to place the electric hydraulic push rod 32. A connecting channel, i.e., an angle hole, is provided between the groove and the middle hole. The electric hydraulic push rod 32 uses the motor 28 as a power source. The motor 28 rotates, so that the hydraulic oil outputs the pressure oil through the bidirectional gear pump, and is sent to the working oil cylinder through the oil circuit integrated block to realize the reciprocating motion of the piston rod. The electric hydraulic push rod 32 has a self-locking function, and stops moving after the clamp locks the pile head. The end of the electric hydraulic push rod 32 is connected to the clamp by a bolt 44.

[0068] According to an embodiment of the present application, the clamp is a detachable structure, and the clamp includes clamps that match different pile types.

[0069] The clamp is detachable and can be designed according to the pile type. The detachable clamp 33 can be designed according to the cross-sectional shape of the pile, which is more flexible and convenient.

[0070] The high-frequency pile sinking device suitable for low headroom is composed of loose parts that are assembled after arriving at the construction site. The height of the device is less than 3m. The device is small in size and can be used in workshops and basements with small headroom.

[0071] The present application also provides a low-headroom pile driving construction method, which uses the above-mentioned high-frequency pile driving device to perform pile driving construction.

[0072] After the high-frequency pile driving device is assembled, the anchor pile 51 is placed in the corresponding position inside the device. The device is lowered by the electric winch 14 so that the pile head enters the fixture hole, and the electric hydraulic push rod 32 is opened to fix the anchor pile 51. Then the bidirectional high-frequency vibration device is turned on to drive the pile.

[0073] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A high-frequency pile driving device suitable for low headroom, characterized in that: include: The mounting frame comprises a support column, a bracket plate and a connecting piece, wherein the bracket plate is fixed to the opposite end of the support column connected to one end of the foundation, and the connecting piece is connected to a side of the bracket plate close to the foundation; The vibration mechanism comprises a high-strength spring group, a mounting shell, and multiple groups of transmission rods, multiple groups of eccentric wheels, a transmission assembly and a driving mechanism arranged in the mounting shell, wherein the high-strength spring group is arranged outside the mounting shell and connected to the bracket plate, and the multiple groups of eccentric wheels are arranged one by one and sleeved on the multiple groups of transmission rods; the driving mechanism is driven by the transmission assembly to make the multiple groups of transmission rods rotate synchronously; the multiple groups of transmission rods are located in the same plane and are symmetrically distributed, and the rotation directions of any two symmetrically distributed transmission rods are opposite; A fixture part, connected and linked with the multiple groups of eccentric wheels; The anchor pile is fixed to the clamp part.

2. The high-frequency pile driving device according to claim 1, characterized in that: The driving mechanism comprises a motor and a motor gear; The transmission assembly includes a first transmission assembly and a second transmission assembly; The driving mechanism is located between two sets of transmission rods and is connected by the first transmission assembly. The first transmission assembly includes a double gear and a steering gear. The double gear includes a small gear meshing with the motor gear and a large gear meshing with the steering gear. The steering gear is fixed to the end of the transmission rod. The second transmission assembly includes a plurality of steering wheel groups, and the plurality of steering wheel groups are respectively arranged between two adjacent transmission rods of the remaining groups for synchronous transmission.

3. The high-frequency pile driving device according to claim 2, characterized in that: The number of the multiple groups of transmission rods is 4.

4. The high-frequency pile driving device according to claim 2, characterized in that: The eccentric wheel is located in the middle of the transmission rod and is fixed and limited by bearings located on both sides of the eccentric wheel.

5. The high-frequency pile driving device according to claim 1, characterized in that: It also includes an electric winch, which is located on the support plate, and the connecting member is connected to the steel wire rope of the electric winch.

6. The high-frequency pile driving device according to claim 1, characterized in that: It also includes a guide rail, which is sleeved on the support column, and the installation shell is connected to the guide rail.

7. The high-frequency pile driving device according to claim 2, characterized in that: The clamp part includes a clamp body, an electric hydraulic push rod and a clamp. The clamp body has a mounting hole for the anchor pile to be installed and a clamp hole connected to the side of the mounting hole. The clamp is arranged in the clamp hole and connected to the electric hydraulic push rod.

8. The high-frequency pile driving device according to claim 7, characterized in that: The clamp is a detachable structure, and the clamp includes clamps matching different pile types.

9. The high frequency pile driving device according to any one of claims 1 to 8, characterized in that: It also includes a counterweight mechanism, which is a steel base or a precast concrete base; The steel base comprises steel and embedded anchor rods, and the steel is fixed to one end of the support column connected to the foundation; The precast concrete base comprises a precast concrete block and a pre-embedded connecting piece, and the precast concrete block is fixed to one end of the support column connected to the foundation.

10. A low-headroom pile construction method, characterized in that: The high-frequency pile driving device according to any one of claims 1 to 9 is used for pile driving construction.

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