A dual-power high-speed mixing drilling rig and a construction method thereof

Abstract

This invention provides a dual-power high-speed mixing drill and its construction method, relating to the field of building engineering technology. It achieves coordinated drilling and mixing, improving construction stability and safety. The drill includes a chassis, a front end, a back end, a power system, and a control platform. The back end and control platform are mounted on the chassis. The power system is connected to the front end, which is also mounted on the chassis. A drive pressure plate chain at the front end connects the drive pressure plate to the load-bearing pile frame, and a rotary drive chain connects to the rotary drive assembly. The drive drill rod and drive pressure plate are connected via flanges, and the drive drill rod is pin-connected to an external drill rod or drill bit. Construction using this mixing drill includes adjusting the chassis and load-bearing pile frame. After the drill starts, the drive pressure plate and rotary drive assembly move along the drilling direction. The drill bit pumps out curing agent and high-pressure gas, and the rotary drive assembly assists in connecting and disassembling the drill rod. This method offers advantages such as convenient construction and low cost.

Description

Technical Field

[0001] This invention relates to the field of construction engineering technology, and in particular to a dual-power high-speed mixing drill and a method for construction using the dual-power high-speed mixing drill. Background Technology

[0002] With the rapid development of urban construction, land resources are becoming increasingly scarce, making the full development and utilization of underground space an inevitable trend in urban development. Urban underground space is developing towards greater depth and scale, and large-scale investment and planning will bring more challenges and difficulties to underground engineering construction. Currently, piling machinery is widely used in key projects such as municipal construction, subway construction, maintenance of mature buildings, water conservancy, and airport construction, with a large market demand. At the same time, higher requirements are being placed on the energy-saving, environmentally friendly, and high-efficiency performance of piling machinery.

[0003] Mixing drilling rigs are characterized by high installed power, high output torque, good hole quality, flexible and convenient operation, high construction efficiency, and low environmental pollution. Combined with different drilling tools, they can adapt to geological conditions in most regions, making them a major construction machine suitable for bored pile construction in building foundation engineering. However, due to the continuously expanding application range of mixing drilling rigs, and the varying load requirements under different construction conditions or methods, existing mixing drilling rigs, with their single drilling mode, can no longer meet the demands of drilling in diverse geological conditions. Furthermore, the weight and structural design of the mast severely restrict the height of the drilling rig tower, forcing the use of additional drill rods during deep and large foundation pit construction, significantly reducing construction efficiency. Summary of the Invention

[0004] To coordinate the drilling and mixing processes of a mixing drill and improve construction stability and safety, this invention provides a dual-power high-speed mixing drill and its construction method, overcoming the shortcomings of existing technologies. By combining the dual power structures, the torque transmission equipment and the propulsion equipment are separated, ensuring they do not interfere with each other and facilitating construction. Furthermore, the rotary power unit has a wide speed adjustment range and a large torque output. By setting up a rotary drive assembly, both axial and radial degrees of freedom can be simultaneously limited, and both axial and radial load-bearing capacities can be provided simultaneously, providing auxiliary support for the rotary table and making its axis more stable. The lightweight pile frame reduces the weight of the mast by using truss-type components, minimizing the impact of wind loads on construction and facilitating disassembly and transportation. By using steel pipes as the first mast section, the mast's strength is increased, and the mast's center of gravity is lowered, improving the stability and safety of the equipment.

[0005] A dual-power high-speed mixing drill includes a chassis, a drill front end, a drill back end, a power system, and a control platform. The drill back end and control platform are arranged on the chassis, and the power system is connected to the drill front end, which is mounted on the chassis. The drill back end includes a curing agent mixing system and a high-pressure gas supply system. The power system provides power to the chassis and the drill front end. The drill front end includes a load-bearing pile frame, a lightweight pile frame, a drive pressure plate, a rotary drive assembly, a drive drill rod, a drive pressure plate chain, and a rotary drive chain. The drive pressure plate includes a drive gear, a first driven gear, a second driven gear, a third driven gear, and a fourth driven gear. The drive gear, first driven gear, second driven gear, first passive gear, and drive gear cooperate with each other and are arranged at the lower end of the load-bearing pile frame. The second and third passive gears are arranged at the upper end of the load-bearing pile frame, and the third and fourth driven gears are arranged at the upper end of the lightweight pile frame. The frame includes a pile frame body and pile frame pulleys. The lower end of the pile frame body is connected to the load-bearing pile frame. Multiple pile frame pulleys are arranged on the pile frame body. The load-bearing pile frame includes a load-bearing pile frame body and a slide rail, which is arranged along the load-bearing pile frame body. The drive pressure plate includes a pressure plate base, an end protrusion, and a drive pressure plate body. A pressure plate slot is provided on the pressure plate base, and the pressure plate slot cooperates with the slide rail on the lightweight pile frame. The drive pressure plate chain connects the pressure plate base and the end protrusion respectively. The rotary drive... The moving assembly includes a rotating body, a rotating drive slot, a rotating drive chamber, and a locking device. The rotating drive slot cooperates with a slide rail on the load-bearing pile frame. The rotating drive chamber is configured on the rotating body. The locking device fixes the relative position of the rotating drive assembly and the load-bearing pile frame. The rotating drive chain is separately connected to the upper and lower end faces of the rotating body. The drive drill rod and the drive pressure plate are connected by a flange. The drive drill rod is connected to the external drill rod and drill bit by a pin.

[0006] Preferably, the cross-section of the drive drill pipe is polygonal, and the cross-section of the external drill pipe is polygonal or circular.

[0007] Preferably, the main body of the load-bearing pile frame is in the shape of a cylindrical tube, and the length of the load-bearing pile frame is greater than the length of the external drill rod, and the length of the load-bearing pile frame is also greater than the length of the drill bit.

[0008] Preferably, a fixed frame is welded to the end of the lightweight pile frame body, and the third driven gear and the fourth driven gear are symmetrically arranged on the fixed frame; the lightweight pile frame body is a truss structure.

[0009] Preferably, the diameter of the driving gear is larger than the diameters of the first driven gear, the second driven gear, the third driven gear, and the fourth driven gear; the first driven gear is mounted above the driving gear, and the second driven gear is mounted below the driving gear.

[0010] Preferably, the pressure plate slot is semi-circular; the driving gear, the first driven gear, the second driven gear, the first passive gear, the second passive gear, the third passive gear and the drive gear are provided with bearings in the middle, the bearings cooperate with the cylindrical shaft, and the end of the cylindrical shaft is welded and fixed to the load-bearing pile frame or the lightweight pile frame.

[0011] A construction method for a dual-power high-speed mixing drill rig, utilizing the aforementioned dual-power high-speed mixing drill rig, includes the following specific construction steps:

[0012] S1. Start the drilling rig through the control platform, adjust the position of the chassis and the front end of the drilling rig, and after adjusting the chassis to be horizontal and the drill rod to be vertical, run the drilling rig for 5-10 minutes.

[0013] S2. The drive pressure plate and rotary drive assembly work, driving the pressure plate body and rotary body to move downwards, and the drive pressure plate drives the drill rod and drill bit to move downwards; when the rotary body is 0-1m away from the lower end of the load-bearing pile frame, the locking device is activated, and the rotary drive assembly is fixed on the load-bearing pile frame.

[0014] S3. When the drill bit is 0-1m away from the ground, the rotary drive chamber of the rotary drive assembly moves downward. After the drill bit enters the soil, the curing agent mixing system and the high-pressure air supply system are started. The drilling rig back-end controls the drill bit to pump curing agent and high-pressure air into the soil.

[0015] S4. The connection operation of the external drill rod includes: when the upper part of the drill bit is 0.5-2m above the ground, shut down the drilling rig back-end and power system, separate the drive drill rod and drill bit, drive the pressure plate and rotary drive assembly to work, drive the pressure plate body and rotary body to move upward until the rotary drive assembly moves to the upper end of the load-bearing pile frame, drive the pressure plate and rotary drive assembly to stop working, connect the external drill rod between the drive drill rod and drill bit, repeat this step to connect multiple external drill rods until the borehole is stirred to the set depth;

[0016] S5. Drive the pressure plate and rotary drive assembly to work, drive the pressure plate body and rotary body to move upward, drive the drill rod, external drill rod and drill bit to move upward, start the curing agent mixing system and high pressure air supply system, and the drilling rig back-end controls the drill bit to continuously pump curing agent and high pressure air into the soil.

[0017] S6. When the lower end of the drive drill rod is raised to the ground, the rotary drive assembly works, and the rotary body moves upward until the rotary drive assembly moves to the upper end of the load-bearing pile frame. The locking device of the rotary drive assembly is activated, and the rotary drive assembly is fixed to the upper end of the load-bearing pile frame. At the same time, the drive drill rod continues to be raised upward. The lifting speed of the drive drill rod is less than or equal to the lifting speed of the rotary drive assembly.

[0018] S7. The removal operation of the external drill rod includes: when the distance between the lower end of the drive drill rod and the rotary drive assembly is 0.2-1m, shut down the drilling rig back-end and power system, separate the external drill rod and drive drill rod, remove the external drill rod, drive the pressure plate to work, drive the pressure plate body and drive drill rod to move downward, connect the drive drill rod and external drill rod, lift the drive drill rod again, repeat this step to remove multiple drill rods until the drill bit leaves the soil and a mixing pile is formed at the drilling location;

[0019] S8. Level the soil surface around the mixing pile, pour the curing agent back into the mixing pile and fill it with solidified soil to the design elevation.

[0020] More preferably, when the torque of the drive drill pipe is greater than 15000 N·m, the working power of the rotary drive chamber is increased by the power system to keep the output speed of the rotary drive chamber in the range of 5-15 r / min, and at the same time the output power of the drive pressure plate is increased by the power system to keep the downward movement speed of the drive pressure plate in the range of 0.2-1 m / min.

[0021] More preferably, the downward moving speed of the driving pressure plate body and the rotary body is controlled within the range of 0.2-1m / min, and the upward moving speed of the driving pressure plate body and the rotary body is controlled within the range of 0.5-2m / min.

[0022] More preferably, the amount of curing agent used in the soil accounts for 10%-40%, and the curing agent includes powder and slurry. The powder curing agent is delivered by a high-pressure air pump with a pressure greater than 0.8 MPa, and the mass ratio of the slurry curing agent to water is greater than 0.8:1.

[0023] The present invention provides a dual-power high-speed mixing drill and its construction method, the beneficial effects of which include:

[0024] (1) By combining the dual power structure, the torque transmission equipment and the propulsion equipment are separated, and the rotation of the drill rod and the propulsion are not affected by each other, which facilitates construction. The rotary power device has a wide speed adjustment range and a large torque output, which ensures the coordinated cooperation of drilling and mixing. (2) By setting the rotary power device, the axial and radial degrees of freedom can be limited at the same time, and the axial and radial bearing capacity can be provided at the same time. It can play an auxiliary support role for the rotary table, making the axis of the rotary drive rotating chamber more stable. (3) The lightweight pile frame reduces the weight of the mast by using truss components, reduces the impact of wind load on construction, and facilitates disassembly and transportation. (4) The load-bearing pile frame is made of steel pipe, which increases the strength of the load-bearing pile frame, lowers the center of gravity of the tower, and improves the stability and safety of the equipment. Attached Figure Description

[0025] Figure 1This is a schematic diagram of the front end of a dual-power high-speed mixing drill.

[0026] Figure 2 This is a structural schematic diagram of a load-bearing pile frame;

[0027] Figure 3 This is a schematic diagram of the structure at the end of a lightweight pile frame;

[0028] Figure 4 This is a schematic diagram of the installation structure of the drive pressure plate;

[0029] Figure 5 This is a top view of the drive pressure plate;

[0030] Figure 6 This is a structural schematic diagram of a lightweight piling frame;

[0031] Figure 7 This is a schematic diagram of the rotary drive assembly;

[0032] Figure 8 This is a schematic diagram of the working status of the front end of the dual-power high-speed mixing drill.

[0033] In the diagram: 1-Lightweight pile frame, 2-Bearing pile frame, 3-Drive pressure plate, 4-Rotary drive assembly, 5-Drive drill rod, 6-Drill bit, 7-Fixing frame, 8-Drive pressure plate chain, 9-Rotary drive chain, 10-Drive gear, 11-First driven gear, 12-Second driven gear, 13-Third driven gear, 14-Fourth driven gear, 15-Drive gear, 16-First passive gear, 17-Second passive gear, 18-Third passive gear, 19-Rotary body, 20-Rotary drive slot, 21-Rotary drive rotating chamber, 22-Slide rail, 23-Pressure plate base, 24-End protrusion, 25-Drive pressure plate body, 26-Pressure plate slot, 27-External drill rod. Detailed Implementation

[0034] Combination Figures 1 to 8 As shown, a specific implementation method of a dual-power high-speed mixing drill and its construction method provided by the present invention will be described.

[0035] A dual-power high-speed mixing drilling rig includes a chassis, a drilling rig front end, a drilling rig back end, a power system, and a control platform. The drilling rig back end and control platform are located on the chassis. The control platform controls all parts of the drilling rig. The power system is connected to the drilling rig front end and includes a pressure plate power system, a circumferential rotation power system, a vertical rotation power system, a chassis power system, a pile frame power system, and a drilling rig accessory power system, providing power to each part. It can be electrically or hydraulically driven. The drilling rig front end is mounted on the chassis and moves with it. Furthermore, the angle and direction of the drilling rig front end and the chassis can be changed according to construction needs. The drilling rig back end includes a curing agent mixing system and a high-pressure air supply system. The curing agent mixing system provides the mixed curing agent to the drill bit, and the high-pressure air supply system provides high-pressure air to the drill bit. The power system provides power to the chassis and the drilling rig front end, and controls and adjusts the chassis level and the angle between the drilling rig front end and the soil.

[0036] The drilling rig's front end includes a load-bearing pile frame 2, a lightweight pile frame 1, a drive pressure plate 3, a rotary drive assembly 4, a drive drill rod 5, a drive pressure plate chain 8, and a rotary drive chain 9. These components work together to achieve dual-power propulsion for drilling and rotation. The drive pressure plate 3 includes a drive gear 15, a first driven gear 11, a second driven gear 12, a third driven gear 13, and a fourth driven gear 14. The drive gear 15 provides power, and each driven gear, in conjunction with the drive gear, drives the movement of the drive pressure plate chain 8. The first driven gear 11, the second driven gear 12, the first passive gear 16, and the drive gear 15 work together and are positioned at the lower end of the load-bearing pile frame 2. The second passive gear 17 and the third passive gear 18 are positioned at the upper end of the load-bearing pile frame, and the third driven gear 13 and the fourth driven gear 14 are positioned at the upper end of the lightweight pile frame 1. The rotary drive chain 9 connects the rotary drive assembly 4, the first driven gear 11, the drive gear 15, the first driven gear 16, the second driven gear 12, the second driven gear 17, and the third driven gear 18, controlling the rotary drive assembly to move along the load-bearing pile frame via gear transmission. The diameter of the drive gear 10 is larger than the diameters of the first driven gear 11, the second driven gear 12, the third driven gear 13, and the fourth driven gear 14. The first driven gear 11 is installed above the drive gear, and the second driven gear 12 is installed below the drive gear. The pressure plate slot 26 is semi-circular. Bearings are provided in the middle of the drive gear 10, the first driven gear 11, the second driven gear 12, the first driven gear 16, the second driven gear 17, the third driven gear 18, and the drive gear 15. The bearings cooperate with the cylindrical shaft, and the end of the cylindrical shaft is welded and fixed to the load-bearing pile frame or light pile frame.

[0037] The lightweight pile frame 1 includes a pile frame body and pile frame pulleys. The lower end of the pile frame body is connected to the load-bearing pile frame, and multiple pile frame pulleys are arranged on the pile frame body. A fixed frame 7 is welded to the end of the lightweight pile frame body, and a third driven gear 13 and a fourth driven gear 14 are symmetrically arranged on the fixed frame. The driving gear 10 cooperates with the third driven gear 13 and the fourth driven gear 14 to control the drive pressure plate 3 to move up and down along the lightweight pile frame body. The lightweight pile frame body is a truss structure, which can be composed of multiple hollow cylindrical members. The hollow cylindrical members are welded to form multiple triangular components, which are then combined to form the lightweight pile frame body. A connection mechanism can be set between the lightweight pile frame body and the chassis, and the connection structure can also control the tilt angle of the lightweight pile frame.

[0038] The load-bearing pile frame 2 includes a main body and a slide rail 22. The slide rail 22 is arranged along the main body of the load-bearing pile frame to facilitate the movement of the rotary drive assembly. The main body of the load-bearing pile frame is in the shape of a cylindrical tube. The length of the load-bearing pile frame 2 is greater than the length of the external drill rod 27, and the length of the load-bearing pile frame 2 is also greater than the length of the drill bit 6.

[0039] The drive pressure plate 3 includes a pressure plate base 23, an end protrusion 24, and a drive pressure plate body 25. A pressure plate slot 26 is provided on the pressure plate base 23, which engages with a slide rail on the lightweight pile frame 1. A drive pressure plate chain 8 connects the pressure plate base and the end protrusion. The rotary drive assembly 4 includes a rotary body 19, a rotary drive slot 20, a rotary drive rotating chamber 21, and a locking device. The rotary drive slot 20 engages with a slide rail 22 on the load-bearing pile frame. The rotary drive rotating chamber 21 is mounted on the rotary body. The locking device fixes the relative position of the rotary drive assembly 4 and the load-bearing pile frame 2. The rotary drive chain separately connects the upper and lower ends of the rotary body, thereby controlling the vertical movement of the rotary body. The drive drill rod and the drive pressure plate are connected by a flange to ensure connection stability.

[0040] The drive drill pipe is connected to the external drill pipe and drill bit via pins. The drive drill pipe has a polygonal cross-section, while the external drill pipe has a polygonal or circular cross-section.

[0041] A construction method for a dual-power high-speed mixing drill rig, utilizing the aforementioned dual-power high-speed mixing drill rig, includes the following specific construction steps:

[0042] S1. Start the drilling rig through the control platform, adjust the position of the chassis and the front end of the drilling rig, and after adjusting the chassis to be horizontal and the drill rod to be vertical, run the drilling rig for 5-10 minutes.

[0043] S2. The drive pressure plate and rotary drive assembly work, driving the pressure plate body and rotary body to move downwards, and the drive pressure plate drives the drill rod and drill bit to move downwards; when the rotary body is 0-1m away from the lower end of the load-bearing pile frame, the locking device is activated, and the rotary drive assembly is fixed on the load-bearing pile frame; while starting the locking device of the rotary drive assembly, the vertical rotary power system is shut down so that the rotary drive assembly is locked on the load-bearing pile frame.

[0044] S3. When the drill bit is 0-1m away from the ground, the rotary drive chamber of the rotary drive assembly moves downward. After the drill bit enters the soil, the curing agent mixing system and the high-pressure gas supply system are activated. The drilling rig's back-end controls the drill bit to pump curing agent and high-pressure gas into the soil. The curing agent and high-pressure gas are evenly mixed into the soil.

[0045] S4. The connection operation of the external drill rod includes: when the upper part of the drill bit is 0.5-2m above the ground, shut down the drilling rig back-end and power system, separate the drive drill rod and drill bit, drive the pressure plate and rotary drive assembly to work, drive the pressure plate body and rotary body to move upward until the rotary drive assembly moves to the upper end of the load-bearing pile frame, drive the pressure plate and rotary drive assembly to stop working, connect the external drill rod between the drive drill rod and drill bit, repeat this step to connect multiple external drill rods until the borehole is stirred to the set depth.

[0046] Specifically, when additional drill rods are needed, when the top of the drill bit is 0.5-2m from the ground, shut down the pressure plate power system, vertical rotation power system, and circumferential rotation power system. After shutting down the drilling rig's backstage, release the locking device between the drive drill rod and the drill bit, separating the drive drill rod from the drill bit. Then, start the pressure plate power system and vertical rotation power system to make the drive gear and drive gear rotate in opposite directions, thereby driving the drive pressure plate and rotation drive assembly to move upwards. When the rotation drive assembly moves to the top of the load-bearing pile frame, shut down the pressure plate power system and vertical rotation power system, and then attach the upper part of the external drill rod... The lower part is connected and locked to the drive drill rod and drill bit respectively. If multiple external drill rods need to be added, repeat this step in a similar manner. Open the drilling rig back panel, and insert the previous external drill rod into the soil by stirring downwards. Then, release the locking device between the previous drill rod and the drive drill rod, move the drive pressure plate and rotary drive assembly upwards, and add the next drill rod. Repeat the operation until the last external drill rod is added. Perform the above steps. When the last drill rod is added or no more drill rods need to be added, continue to drive the drive drill rod, drill bit or external drill rod to rotate and move downwards until the set depth is reached.

[0047] S5. Drive the pressure plate and rotary drive assembly to work, drive the pressure plate body and rotary body to move upward, drive the drill rod, external drill rod and drill bit to move upward, start the curing agent mixing system and high pressure air supply system, and the drilling rig back-end controls the drill bit to continuously pump curing agent and high pressure air into the soil.

[0048] S6. When the lower end of the drive drill rod is raised to the ground, the rotary drive assembly operates, and the rotary body moves upward until the rotary drive assembly moves to the upper end of the load-bearing pile frame. The locking device of the rotary drive assembly is activated, and the rotary drive assembly is fixed to the upper end of the load-bearing pile frame. At the same time, the drive drill rod continues to be raised upward. The lifting speed of the drive drill rod is less than or equal to the lifting speed of the rotary drive assembly.

[0049] S7. The removal operation of the external drill rod includes: when the distance between the lower end of the drive drill rod and the rotary drive assembly is 0.2-1m, shut down the drilling rig backstage and power system, separate the external drill rod and drive drill rod, remove the external drill rod, drive the pressure plate to work, drive the pressure plate body and drive drill rod to move downward, connect the drive drill rod and external drill rod, raise the drive drill rod again, repeat this step to remove multiple drill rods until the drill bit leaves the soil and a mixing pile is formed at the drilling location.

[0050] Specifically, if an external drill rod is present, when the distance between the lower end of the drive drill rod and the rotary drive assembly is 0.2-1.0m, shut down the pressure plate power system and the circumferential rotary power system, close the drilling rig's back-end, release the locking devices between the upper and lower parts of the external drill rod and the drive drill rod and drill bit respectively, remove the external drill rod, and then start the pressure plate power system to make the drive gear rotate forward, thereby driving the drive pressure plate and drive drill rod to move downward until the drive drill rod is reconnected to the drill bit and locked. If multiple external drill rod sections are present, repeat this step similarly. After removing the upper first external drill rod section, start the pressure plate power system to make the drive gear rotate forward, thereby driving the drive pressure plate and drive drill rod to move downward until the drive drill rod is reconnected to the next external drill rod section and locked. Lift the drive drill rod upwards. When the distance between the lower end of the drive drill rod and the rotary drive assembly is 0.2-1.0m, turn off the pressure plate power system and the circumferential rotary power system, and close the drilling rig's backstage. Release the locking devices between the upper and lower parts of the external drill rod and the drive drill rod and drill bit, respectively. Remove the section of the external drill rod. Repeat the operation until the last external drill rod is removed, so that the drive drill rod and drill bit are reconnected and locked. When the last section of the external drill rod has been released, or when there are no released external drill rods, turn on the pressure plate power system to make the drive gear rotate in the reverse direction, thereby driving the drive pressure plate and drive drill rod to move upwards. Turn on the circumferential rotary power system to make the rotary drive rotating chamber rotate in the reverse direction. Finally, after the drill bit is completely detached from the soil, turn off the pressure plate power system and the circumferential rotary power system, and close the drilling rig's backstage.

[0051] S8. Level the soil surface around the mixing pile, pour the curing agent back into the mixing pile and fill it with solidified soil to the design elevation.

[0052] The above steps can be repeated until the construction is completed.

[0053] When the torque of the drive drill pipe is greater than 15000 N·m, the working power of the rotary drive chamber is increased through the power system to keep the output speed of the rotary drive chamber in the range of 5-15 r / min. At the same time, the output power of the drive pressure plate is increased through the power system to keep the downward movement speed of the drive pressure plate in the range of 0.2-1 m / min.

[0054] The downward movement speed of the driving pressure plate body and the rotary body is controlled within the range of 0.2-1m / min, and the upward movement speed of the driving pressure plate body and the rotary body is controlled within the range of 0.5-2m / min.

[0055] The amount of curing agent used in the soil is 10%-40%, and the curing agent includes powder and slurry. The powder curing agent is delivered by a high-pressure air pump with a pressure greater than 0.8 MPa. The mass ratio of the slurry curing agent to water is greater than 0.8:1.

[0056] The dual-power high-speed mixing drilling rig and its construction method separate the torque transmission equipment and the propulsion equipment through a dual-power structure combination, ensuring that the rotation of the drill rod and the propulsion do not affect each other, facilitating construction. The rotary power unit has a wide speed adjustment range and a large torque output, ensuring coordinated drilling and mixing. By setting a rotary power device, it is possible to simultaneously limit axial and radial degrees of freedom and provide axial and radial load-bearing capacity, which can play an auxiliary support role for the rotary table, making the axis of the rotary drive chamber more stable. The lightweight pile frame reduces the weight of the mast by using truss components, reducing the impact of wind load on construction and facilitating disassembly and transportation. The load-bearing pile frame is made of steel pipe, which increases the strength of the load-bearing pile frame and lowers the center of gravity of the tower, improving the stability and safety of the equipment.

[0057] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A construction method for a dual-power high-speed mixing drill, characterized in that, Construction is carried out using a dual-power high-speed mixing drilling rig, which includes a chassis, a drilling rig front end, a drilling rig back end, a power system, and a control platform. The drilling rig back end and control platform are arranged on the chassis, and the power system is connected to the drilling rig front end, which is mounted on the chassis. The drilling rig back end includes a curing agent mixing system and a high-pressure air supply system. The power system provides power to the chassis and the drilling rig front end. The drilling rig front end includes a load-bearing pile frame, a lightweight pile frame, a drive pressure plate, a rotary drive assembly, a drive drill rod, a drive pressure plate chain, and a rotary drive chain. The drive pressure plate includes a drive gear, a first driven gear, and a second driven gear. The third and fourth driven gears, along with the drive gear, provide power. The first, second, third, and fourth driven gears, in conjunction with the drive gear, drive the pressure plate chain. The first, second, and third driven gears, along with the drive gear, cooperate and are positioned at the lower end of the load-bearing pile frame. The second and third driven gears are positioned at the upper end of the load-bearing pile frame, and the third and fourth driven gears are positioned at the upper end of the lightweight pile frame. The lightweight pile frame includes a pile frame body and pile frame pulleys. The lower end of the pile frame body is connected to the load-bearing pile frame, and the pile frame body is equipped with... The system includes multiple pile frame pulleys; the load-bearing pile frame comprises a main body and a slide rail, with the slide rail arranged along the main body of the load-bearing pile frame; the drive pressure plate comprises a pressure plate base, an end protrusion, and a drive pressure plate body, with a pressure plate slot on the pressure plate base that engages with the slide rail on the lightweight pile frame; the drive pressure plate chain connects the pressure plate base and the end protrusion respectively; the rotary drive assembly comprises a rotary body, a rotary drive slot, a rotary drive rotating chamber, and a locking device, with the rotary drive slot engaging with the slide rail on the load-bearing pile frame, the rotary drive rotating chamber positioned on the rotary body, and the locking device securing the rotary drive assembly. The relative position of the load-bearing pile frame; the rotary drive chain is separately connected to the upper and lower end faces of the rotary body, and the rotary drive chain connects the rotary drive assembly, the first driven gear, the drive gear, the first driven gear, the second driven gear, the second driven gear, and the third driven gear, controlling the rotary drive assembly to move along the load-bearing pile frame through gear transmission; the drive drill rod and the drive pressure plate are connected by a flange; the drive drill rod is connected to the external drill rod and drill bit by a pin; the diameter of the drive gear is larger than the diameters of the first driven gear, the second driven gear, the third driven gear, and the fourth driven gear; The first driven gear is installed above the driving gear, and the second driven gear is installed below the driving gear; the pressure plate slot is semi-circular; the driving gear, the first driven gear, the second driven gear, the first passive gear, the second passive gear, the third passive gear and the drive gear are provided with bearings in the middle, the bearings cooperate with the cylindrical shaft, and the end of the cylindrical shaft is welded and fixed to the load-bearing pile frame or the lightweight pile frame; The specific construction steps of this method are as follows: S1. Start the drilling rig through the control platform, adjust the position of the chassis and the front end of the drilling rig, and after adjusting the chassis to be horizontal and the drill rod to be vertical, run the drilling rig for 5-10 minutes. S2. The drive pressure plate and rotary drive assembly work, driving the pressure plate body and rotary body to move downwards, and the drive pressure plate drives the drill rod and drill bit to move downwards; when the rotary body is 0-1m away from the lower end of the load-bearing pile frame, the locking device is activated, and the rotary drive assembly is fixed on the load-bearing pile frame. S3. When the drill bit is 0-1m away from the ground, the rotary drive chamber of the rotary drive assembly moves downward. After the drill bit enters the soil, the curing agent mixing system and the high-pressure air supply system are started. The drilling rig back-end controls the drill bit to pump curing agent and high-pressure air into the soil. S4. The connection operation of the external drill rod includes: when the upper part of the drill bit is 0.5-2m above the ground, shut down the drilling rig back-end and power system, separate the drive drill rod and drill bit, drive the pressure plate and rotary drive assembly to work, drive the pressure plate body and rotary body to move upward until the rotary drive assembly moves to the upper end of the load-bearing pile frame, drive the pressure plate and rotary drive assembly to stop working, connect the external drill rod between the drive drill rod and drill bit, repeat this step to connect multiple external drill rods until the borehole is stirred to the set depth; S5. Drive the pressure plate and rotary drive assembly to work, drive the pressure plate body and rotary body to move upward, drive the drill rod, external drill rod and drill bit to move upward, start the curing agent mixing system and high pressure air supply system, and the drilling rig back-end controls the drill bit to continuously pump curing agent and high pressure air into the soil. S6. When the lower end of the drive drill rod is raised to the ground, the rotary drive assembly works, and the rotary body moves upward until the rotary drive assembly moves to the upper end of the load-bearing pile frame. The locking device of the rotary drive assembly is activated, and the rotary drive assembly is fixed to the upper end of the load-bearing pile frame. At the same time, the drive drill rod continues to be raised upward. The lifting speed of the drive drill rod is less than or equal to the lifting speed of the rotary drive assembly. S7. The removal operation of the external drill rod includes: when the distance between the lower end of the drive drill rod and the rotary drive assembly is 0.2-1m, shut down the drilling rig back-end and power system, separate the external drill rod and drive drill rod, remove the external drill rod, drive the pressure plate to work, drive the pressure plate body and drive drill rod to move downward, connect the drive drill rod and external drill rod, lift the drive drill rod again, repeat this step to remove multiple drill rods until the drill bit leaves the soil and a mixing pile is formed at the drilling location; S8. Level the soil surface around the mixing pile, pour the curing agent back into the mixing pile and fill it with solidified soil to the design elevation.

2. The construction method of a dual-power high-speed mixing drill according to claim 1, characterized in that, When the torque of the drive drill rod is greater than 15000 N•m, the working power of the rotary drive rotating chamber is increased by the power system to keep the output speed of the rotary drive rotating chamber in the range of 5-15 r / min. At the same time, the output power of the drive pressure plate is increased by the power system to keep the downward movement speed of the drive pressure plate in the range of 0.2-1 m / min.

3. The construction method of a dual-power high-speed mixing drill according to claim 1, characterized in that, The downward moving speed of the driving pressure plate body and the rotating body is controlled within the range of 0.2-1m / min, and the upward moving speed of the driving pressure plate body and the rotating body is controlled within the range of 0.5-2m / min.

4. The construction method of a dual-power high-speed mixing drill according to claim 1, characterized in that, The amount of curing agent used in the soil is 10%-40%, and the curing agent includes powder and slurry. The powder curing agent is delivered by a high-pressure air pump with a pressure greater than 0.8 MPa. The mass ratio of the slurry curing agent to water is greater than 0.8:

1.

5. The construction method of a dual-power high-speed mixing drill according to claim 1, characterized in that, The cross-section of the drive drill rod is polygonal, and the cross-section of the external drill rod is polygonal or circular.

6. The construction method of a dual-power high-speed mixing drill according to claim 1, characterized in that, The main body of the load-bearing pile frame is in the shape of a cylindrical tube. The length of the load-bearing pile frame is greater than the length of the external drill rod, and the length of the load-bearing pile frame is also greater than the length of the drill bit.

7. The construction method of a dual-power high-speed mixing drill according to claim 1, characterized in that, The lightweight pile frame body has a fixed frame welded to its end, and the third driven gear and the fourth driven gear are symmetrically arranged on the fixed frame; the lightweight pile frame body is a truss structure.

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