A screw anchor screwing device and a piling method

Abstract

The application relates to the technical field of engineering construction equipment, in particular to a screw anchor screwing device and a piling method, wherein the screw anchor screwing device comprises a screw anchor body, the screw anchor body is connected with a plurality of anchor discs, a screwing assembly is used for driving the screw anchor body to rotate, a high-frequency vibration assembly is used for driving the screw anchor body to produce rotational vibration around the axis of the screw anchor body, an anchor disc adjusting assembly comprises an output mechanism and an air pressure opening and closing mechanism, and a resistance reducing assembly comprises a recovery mechanism and a release mechanism. In the application, the high-frequency vibration assembly can effectively reduce the frictional resistance between the soil and the anchor disc of the anchor rod, the anchor disc adjusting assembly can effectively break hard soil blocks around the anchor disc during use, the resistance reducing assembly can recycle the air of the anchor disc adjusting assembly and release the air into the gaps around the screw blade, and the friction between soil particles is reduced.

Description

Technical Field

[0001] This invention relates to the field of engineering construction equipment technology, specifically to a spiral anchor tightening device and a pile driving method. Background Technology

[0002] Helical anchor foundations are a widely used type of foundation in engineering structures. Due to their unique construction and superior load-bearing performance, they have received increasing attention and application in the engineering field in recent years. Helical anchor foundations were initially mainly used in the foundations of power line towers and communication towers. They work by rotating a helical anchor disc deep into the soil, generating enormous tensile and lateral load-bearing forces. With technological advancements, the application of helical anchors has gradually expanded to multiple fields such as construction, bridges, and marine engineering.

[0003] The construction of helical anchor foundations requires specialized screwing equipment, typically hydraulically or electrically driven torque converters. The choice of equipment depends on the size of the helical anchor, the scale of the project, and site feasibility. At the construction site, the helical anchor is positioned according to the design location. Precise control of angle and direction is necessary during positioning to ensure load-bearing capacity and stability after installation. The construction equipment rotates the helical anchor, using its helical disc like a screw, to gradually screw it into the soil until the design depth is reached. During this process, the applied torque must be strictly monitored to ensure successful penetration of the soil and avoid damage to the blades or shaft. Torque is one of the key control parameters during construction. The applied torque must not only be sufficient to overcome soil resistance but also ensure sufficient friction between the soil and the helical disc to guarantee the final load-bearing capacity of the helical anchor. Therefore, the construction equipment is usually equipped with a torque monitoring system to provide real-time feedback on the mechanical conditions during construction.

[0004] Existing single-bolt anchors (with the largest anchor disc diameter in existing projects less than 1m) have limited load-bearing capacity, making it difficult to implement single-anchor structures for high-voltage transmission towers. Large helical anchors or those in dense soil sites require excessively high tightening torque, making installation difficult. Summary of the Invention

[0005] The purpose of this invention is to provide a spiral anchor tightening device and a piling method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] On the one hand, a spiral anchor tightening device is provided, comprising:

[0008] A spiral anchor body, wherein the spiral anchor body is connected to a plurality of anchor discs;

[0009] A screwing assembly is disposed on one side of the auger anchor body, and the screwing assembly is used to drive the auger anchor body to rotate;

[0010] A high-frequency vibration component is disposed between the helical anchor body and the screwing component, and the high-frequency vibration component is used to drive the helical anchor body to generate rotational vibration about its axis.

[0011] An anchor plate adjustment assembly, the anchor plate adjustment assembly includes an output mechanism and a pneumatic opening and closing mechanism, the output mechanism is used to input airflow into the pneumatic opening and closing mechanism, the pneumatic opening and closing mechanism is used to drive the anchor plate to periodically open and close;

[0012] The drag reduction component includes a recovery mechanism and a release mechanism. When the air pressure opening and closing mechanism drives the anchor plate to reset, the air discharged is recovered by the recovery mechanism and fed into the release mechanism. The release mechanism is used to release the air released by the air pressure opening and closing mechanism into the gap between the anchor plate and the soil, thereby reducing the friction between soil particles.

[0013] Preferably, the spiral anchor body includes an anchor rod and an anchor head, the anchor disc includes a spiral anchor disc and a conical spiral anchor disc, the spiral anchor discs are evenly spaced on the anchor rod, and the conical spiral anchor discs are disposed on the anchor head.

[0014] Preferably, the turning assembly includes a turning motor connected to the auger body, and the turning motor is used to drive the auger body to rotate.

[0015] Preferably, the high-frequency vibration component includes a device box, a fixed support, electrode blocks, an actuation bracket, and response blocks. The device box contains a fixed support, and four electrode blocks are arranged around the fixed support. The actuation bracket is coaxially connected to the spiral anchor body, and four response blocks are arranged around the actuation bracket. The current in the electrode blocks is adjusted to drive the response blocks to reciprocate.

[0016] Preferably, the spiral anchor body has a hollow structure, and the output mechanism includes an air pump and a main pipe. The output end of the air pump is connected to the main pipe, and the main pipe is coaxially connected to the spiral anchor body.

[0017] Preferably, the spiral anchor disc includes a fixed part and a movable part. The fixed part is fixedly connected to the anchor rod, and the movable part is movably connected to the fixed part. The pneumatic opening and closing mechanism includes a pneumatic push rod. Several sets of pneumatic push rods are arranged along the main pipe. Each set of pneumatic push rods corresponds to the spiral anchor disc. The pneumatic push rods are interconnected with the main pipe, and the pneumatic push rods are used to drive the movable part to move.

[0018] Preferably, the recycling mechanism includes an electromagnetic connecting valve and an air tank, wherein the electromagnetic connecting valve is connected to the exhaust end of the pneumatic push rod, and the air tank is connected to the electromagnetic connecting valve.

[0019] Preferably, the release mechanism includes a proportional valve, which is connected to the exhaust port of the gas tank and to the fixing part.

[0020] On the other hand, a piling method is provided for using the aforementioned spiral anchor tightening device, comprising the following steps:

[0021] A. Fix the spiral anchor tightening device to the drilling rig;

[0022] B. Start the screwing assembly to drive the auger anchor body to rotate and begin rotational propulsion;

[0023] C. As the main body of the spiral anchor advances, the high-frequency vibration component is activated to drive the main body of the spiral anchor to rotate around its axis, and the pneumatic opening and closing mechanism is activated to drive the anchor plate to open and close periodically.

[0024] D. When the air pressure opening and closing mechanism releases pressure, the release mechanism releases air into the gap between the anchor plate and the soil, reducing friction between soil particles.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: the high-frequency vibration component in this application can effectively reduce the frictional resistance between the soil and the anchor bolt / anchor plate, and reduce the resistance torque of the soil on the entire helical anchor. The anchor plate adjustment component can effectively break up hard soil blocks around the anchor plate during use, thereby reducing the screwing resistance. The drag reduction component can recover and utilize the air in the anchor plate adjustment component and release the air into the gaps around the helical blades, reducing the friction between soil particles, thereby further improving the propulsion process. Under the combined action of the high-frequency vibration component, the anchor plate adjustment component, and the drag reduction component, for helical anchors of the same size, the torque required by the screwing motor in this application will be less than that of ordinary screwing motors. Similarly, under the condition of applying the same torque, the helical anchor size that this application can screw is larger than that of ordinary helical anchor screwing devices (i.e., larger anchor plate diameter, number of anchor plates, and anchor bolt diameter). Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention. Figure 1 ;

[0027] Figure 2 This is a three-dimensional structural diagram of the present invention. Figure 2 (The anchor bolts are rendered with a transparent effect).

[0028] Figure 3 This is a schematic diagram of the internal structure of the device box of the present invention;

[0029] Figure 4 This is a schematic diagram of the internal structure of the response block of the present invention;

[0030] Figure 5 This is a schematic diagram showing the position and structure of the fixed part and the movable part of the present invention;

[0031] Figure 6 This is a schematic diagram of the internal structure of the fixing part of the present invention;

[0032] Figure 7 This is a schematic diagram showing the location and structure of the main pipeline, pneumatic push rod, and air tank of the present invention;

[0033] Figure 8 This is a schematic diagram of the connection structure of the electromagnetic communication valve, gas tank, and proportional valve of the present invention.

[0034] In the diagram: 1 Anchor bolt, 2 Anchor head, 3 Spiral anchor disc, 4 Conical spiral anchor disc, 5 Twisting motor, 6 Equipment box, 7 Fixed support, 8 Electrode block, 9 Actuating bracket, 10 Response block, 11 Air pump, 12 Main pipeline, 13 Pneumatic push rod, 14 Electromagnetic connecting valve, 15 Air tank, 16 Proportional valve, 301 Fixed part, 302 Moving part, 1001 Permanent magnet, 1002 Coil. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figure 1-8 The present invention provides a technical solution:

[0037] A spiral anchor tightening device, as shown in the instruction manual. Figure 1 As shown, it includes:

[0038] The main body of the spiral anchor is connected to several anchor discs;

[0039] The screwing assembly is located on one side of the auger anchor body and is used to drive the auger anchor body to rotate.

[0040] A high-frequency vibration component is disposed between the helical anchor body and the screwing component. The high-frequency vibration component is used to drive the helical anchor body to generate rotational vibration around its axis.

[0041] Anchor plate adjustment assembly, which includes an output mechanism and a pneumatic opening and closing mechanism. The output mechanism is used to input airflow into the pneumatic opening and closing mechanism, and the pneumatic opening and closing mechanism is used to drive the anchor plate to open and close periodically.

[0042] The drag reduction component includes a recovery mechanism and a release mechanism. When the air pressure opening and closing mechanism drives the anchor plate to reset, the air that is discharged is recovered by the recovery mechanism and fed into the release mechanism. The release mechanism is used to release the air released by the air pressure opening and closing mechanism into the gap between the anchor plate and the soil, thereby reducing the friction between soil particles.

[0043] The main body of the spiral anchor includes an anchor rod 1 and an anchor head 2. The anchor rod 1 is used to install the spiral anchor disc 3. The anchor head 2 has a conical structure. The anchor disc includes a spiral anchor disc 3 and a conical spiral anchor disc 4. The spiral anchor discs 3 are evenly spaced on the anchor rod 1, and the conical spiral anchor disc 4 is located on the anchor head 2.

[0044] The screwing assembly includes a screwing motor 5, which is a quasi-static torque motor. The torque is applied in a unidirectional direction, which is the screwing direction of the helical anchor. The output end of the screwing motor 5 is fixedly connected to the helical anchor body. The screwing motor 5 is used to drive the helical anchor body to rotate. During construction, as the screwing depth increases and the anchor plate enters the soil, the soil resistance torque on the helical anchor body and the anchor plate gradually increases. The torque provided by the screwing motor 5 is used to overcome the soil resistance torque on the helical anchor.

[0045] The high-frequency vibration assembly includes an equipment box 6, a fixed support 7, electrode blocks 8, an actuation bracket 9, and response blocks 10. The equipment box 6 is used to install other components of the high-frequency vibration assembly. The fixed support 7 is provided inside the equipment box 6. The fixed support 7 is used to connect the equipment box 6 and the output shaft of the screw motor 5 to each other. Four electrode blocks 8 are arranged around the fixed support 7. The actuation bracket 9 is coaxially connected to the helical anchor body. Four response blocks 10 are arranged around the actuation bracket 9. The response block 10 includes a permanent magnet 1001 and a coil 1002. The current in the electrode blocks 8 is adjusted to drive the response blocks 10 to reciprocate. The amplitude and frequency of the reciprocating motion of the response blocks 10 are controlled by adjusting the magnitude and direction of the current in the electrode blocks 8. The reciprocating torque excitation received by the actuation bracket 9 is transmitted to the helical anchor body to which it is connected.

[0046] The main body of the spiral anchor is hollow. The output mechanism includes an air pump 11 and a main pipe 12. The output shaft of the rotary motor 5 is a hollow shaft, which passes through the rotary motor 5. The main pipe 12 passes through the hollow shaft and is connected to the air pump 11. The main pipe 12 and the air pump 11 are connected to each other through a rotatable air connector. The output end of the air pump 11 is connected to the main pipe 12, and the main pipe 12 is coaxially connected to the main body of the spiral anchor.

[0047] The spiral anchor plate 3 includes a fixed part 301 and a movable part 302. The fixed part 301 is fixedly connected to the anchor rod 1. In this embodiment, the movable part 302 is a columnar structure. In actual use, the shape of the movable part can be adapted to the usage requirements (for example, the shape can be changed to a wedge or cone). The movable part 302 is movably connected to the fixed part 301. The pneumatic opening and closing mechanism includes a pneumatic push rod 13. Several sets of pneumatic push rods 13 are arranged along the main pipe 12. Each set of pneumatic push rods 13 is arranged corresponding to the spiral anchor plate 3. The pneumatic push rods 13 and the main pipe 12 are interconnected. The pneumatic push rods 13 are used to drive the movable part 302 to move, thereby breaking the surrounding soil through high-frequency opening and closing, and reducing the spiraling resistance.

[0048] The recovery mechanism includes an electromagnetic connecting valve 14 and an air tank 15. When the pneumatic push rod 13 is reset, the electromagnetic connecting valve 14 will open. The electromagnetic connecting valve 14 is connected to the exhaust end of the pneumatic push rod 13, and the air tank 15 is connected to the electromagnetic connecting valve 14. The release mechanism includes a proportional valve 16, which is connected to the exhaust port of the air tank 15 and to the fixing part 301. The proportional valve 16 is used to release the air in the air tank 15 into the gap around the spiral anchor plate 3, reducing the friction between soil particles and thus improving the propulsion process.

[0049] Working principle: During use, the rotary motor 5 drives the spiral anchor body to rotate. During the rotation, the current inside the electrode block 8 is changed to drive the response block 10 to move. When the response block 10 moves, it drives the actuator bracket 9 to move, thereby causing the spiral anchor body to vibrate at high frequency. At the same time, the air pump 11 drives the pneumatic push rod 13 to reciprocate, thereby driving the moving part 302 to move. This breaks up the surrounding soil through high-frequency opening and closing, reducing the spiraling resistance. When the pneumatic push rod 13 retracts, the air inside the pneumatic push rod 13 is input into the air tank 15 through the electromagnetic connecting valve 14 for storage. The air in the air tank 15 is then released into the gaps around the spiral anchor disc through the proportional valve 16, reducing the friction between soil particles and further improving the propulsion process.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spiral anchor tightening device, characterized in that, include: A spiral anchor body, wherein the spiral anchor body is connected to a plurality of anchor discs; A screwing assembly is disposed on one side of the auger anchor body, and the screwing assembly is used to drive the auger anchor body to rotate; A high-frequency vibration component is disposed between the helical anchor body and the screwing component, and the high-frequency vibration component is used to drive the helical anchor body to generate rotational vibration about its axis. An anchor plate adjustment assembly, the anchor plate adjustment assembly includes an output mechanism and a pneumatic opening and closing mechanism, the output mechanism is used to input airflow into the pneumatic opening and closing mechanism, the pneumatic opening and closing mechanism is used to drive the anchor plate to periodically open and close; The drag reduction component includes a recovery mechanism and a release mechanism. When the air pressure opening and closing mechanism drives the anchor plate to reset, the air that is discharged is recovered by the recovery mechanism and input into the release mechanism. The release mechanism is used to release the air when the air pressure opening and closing mechanism depressurizes into the gap between the anchor plate and the soil, thereby reducing the friction between soil particles. The spiral anchor body includes an anchor rod and an anchor head, and the anchor disc includes a spiral anchor disc and a conical spiral anchor disc; The high-frequency vibration component includes a device box, a fixed support, electrode blocks, an actuating bracket, and a response block. The device box contains a fixed support, and four electrode blocks are arranged around the fixed support. The actuating bracket is coaxially connected to the spiral anchor body, and four response blocks are arranged around the actuating bracket. The current in the electrode blocks is adjusted to drive the response blocks to reciprocate. The spiral anchor body has a hollow structure, and the output mechanism includes an air pump and a main pipe. The output end of the air pump is connected to the main pipe, and the main pipe is coaxially connected to the spiral anchor body. The spiral anchor disc includes a fixed part and a movable part. The movable part is a columnar structure. The fixed part is fixedly connected to the anchor rod, and the movable part is movably connected to the fixed part. The pneumatic opening and closing mechanism includes a pneumatic push rod. Several sets of pneumatic push rods are arranged along the main pipeline. Each set of pneumatic push rods corresponds to the spiral anchor disc. The pneumatic push rods are interconnected with the main pipeline. The pneumatic push rods are used to drive the movable part to move, thereby breaking the surrounding soil through high-frequency opening and closing, and reducing the spiraling resistance.

2. The spiral anchor tightening device according to claim 1, characterized in that: The spiral anchor discs are evenly spaced on the anchor bolt, and the conical spiral anchor discs are located on the anchor head.

3. The spiral anchor tightening device according to claim 2, characterized in that: The turning assembly includes a turning motor, which is connected to the auger body and is used to drive the auger body to rotate.

4. The spiral anchor tightening device according to claim 1, characterized in that: The recovery mechanism includes an electromagnetic connecting valve and an air tank. The electromagnetic connecting valve is connected to the exhaust end of the pneumatic push rod, and the air tank is connected to the electromagnetic connecting valve.

5. The spiral anchor tightening device according to claim 4, characterized in that: The release mechanism includes a proportional valve, which is connected to the exhaust port of the gas tank and the fixing part.

6. A piling method for using the spiral anchor tightening device according to any one of claims 1 to 5, characterized in that, Includes the following steps: A. Fix the spiral anchor tightening device to the drilling rig; B. Start the screwing assembly to drive the auger anchor body to rotate and begin rotational propulsion; C. As the main body of the spiral anchor advances, the high-frequency vibration component is activated to drive the main body of the spiral anchor to rotate around its axis, and the pneumatic opening and closing mechanism is activated to drive the anchor plate to open and close periodically. D. When the air pressure opening and closing mechanism releases pressure, the release mechanism releases air into the gap between the anchor plate and the soil, reducing friction between soil particles.

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