A method for pilot hole preparation with large-diameter down-the-hole hammer in conjunction with vibratory compaction.

Abstract

This invention relates to the field of construction technology, specifically to a method for pre-drilling with a large-diameter down-the-hole hammer in conjunction with vibratory compaction. The method includes: collecting soil samples at different depths at the pre-drilling site using a sampling drill; analyzing the geology at these depths using a soil analyzer; checking the functions and parameters of the large-diameter down-the-hole hammer and auxiliary automatic pre-drilling equipment; and pre-setting the parameters of the automatic pre-drilling equipment based on the geological data from the different depths at the pre-drilling site. During construction, the parameters of the automatic pre-drilling equipment are adjusted according to the actual conditions at the pre-drilling site. This invention uses a motion execution module to input commands to a frequency converter, which in turn controls the actuator to move the pile driver and drive the down-the-hole hammer for auxiliary pre-drilling. This achieves a fully automated construction control system for large-diameter down-the-hole hammer pre-drilling, reducing manpower consumption and improving efficiency.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and more specifically, to a method for using a large-diameter down-the-hole hammer for borehole preparation in conjunction with vibratory compaction. Background Technology

[0002] Vibro-compaction is a method of borehole preparation using vibro-compaction compaction. It involves repeatedly vibrating horizontally with a vibro-compactor and flushing with water to cause momentary structural damage to the surrounding soil within a certain radial range. This reduces shear strength, rearranges soil particles, and increases relative density, thereby reinforcing the borehole wall. To achieve a fully automated construction control system for large-diameter down-the-hole hammer borehole preparation, reducing manpower and improving efficiency, a method for large-diameter down-the-hole hammer borehole preparation in conjunction with vibro-compaction is proposed. Summary of the Invention

[0003] 1. Technical problems to be solved

[0004] To address the problems existing in the prior art, the purpose of this invention is to provide a method for pre-hole drilling with a large-diameter down-the-hole hammer in conjunction with vibratory compaction. Its advantage is that it reduces manpower consumption and improves work efficiency during the pre-hole drilling process.

[0005] 2. Technical Solution

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A method for pilot hole preparation with a large-diameter down-the-hole hammer in conjunction with vibratory compaction includes S1, collecting soil samples at different depths underground at the pilot hole location, and using a soil analyzer to analyze the soil at the different depths to determine the geological characteristics at the different depths.

[0008] S2. Based on the geological characteristics of different depths at the test-tested pilot hole locations, determine the parameters of the large-diameter down-the-hole hammer and the auxiliary automatic pilot hole equipment;

[0009] S3. During construction, adjust the parameters of the automatic drilling equipment according to the actual conditions at the drilling site.

[0010] S4. During the construction process, the large-diameter down-the-hole hammer power head and automatic drilling equipment are controlled by the frequency converter cabinet to drill holes. At the same time, the automatic drilling equipment is coordinated and controlled by the control mechanism to assist the drilling construction.

[0011] S5. Upload the pilot hole construction data to the cloud data platform.

[0012] Optionally, a sampling drilling rig, in conjunction with a spiral drill rod and a rotary soil sampling drill, is used to drill and sample the soil at the pilot hole location. The sampled soil is then tested using a soil analyzer, and the parameters of the down-the-hole hammer and automatic pilot hole equipment are adjusted based on the detected geological characteristics.

[0013] Optionally, the automated drilling equipment includes a pile driver, an air compressor, a down-the-hole hammer, an intelligent control unit, and a control mechanism.

[0014] Optionally, the automatic drilling device is controlled by the intelligent control unit, which includes a main control terminal, an intelligent control module, a wireless transmission module, a motion signal transmission module, and a motion execution module. The intelligent control module is connected to the main control terminal, the wireless transmission module is connected to the intelligent control module, the motion signal transmission module is connected to the wireless transmission module, and the motion execution module is connected to the motion signal transmission module.

[0015] Optionally, the main control terminal is used to perform global control of the intelligent control module, the wireless transmission module, the motion signal transmission module, and the motion execution module. The intelligent control module is used to process and analyze the movement direction of the pile driver and the down-the-hole hammer. The wireless transmission module is used to transmit the movement direction of the pile driver and the down-the-hole hammer processed by the intelligent control module to the motion signal transmission module. The motion execution module is used to control the pile driver to execute the commands issued by the intelligent control module.

[0016] The optional intelligent control module includes an X-axis control module and a Y-axis control module. The X-axis control module is used to process the direction of movement of the pile driver along the X-axis, and the Y-axis control module is used to process the direction of movement of the pile driver along the Y-axis.

[0017] Optionally, the wireless transmission module is connected to a cloud data platform, which is used to store the construction process and data of the pilot hole.

[0018] Optionally, the control mechanism includes a verticality sensor, a down-the-hole hammer bottom position display device, a pilot hole depth sensor, a frequency converter cabinet, and an electric actuator. The verticality sensor is used to detect the verticality of the down-the-hole hammer to the ground. The down-the-hole hammer bottom position display device is used to observe and display the situation of the bottom of the down-the-hole hammer relative to the ground. The pilot hole depth sensor is used to acquire the depth of the down-the-hole hammer into the ground during pilot hole construction. The frequency converter cabinet is used to control the operation of the electric actuator. Starting the actuator is used to control the piling machine to adjust the height and position of the down-the-hole hammer. The electric actuator is connected to the motion execution module.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the advantages of this invention are:

[0021] This solution calculates the longitudinal and lateral movement distances of the down-the-hole hammer using the X-axis and Y-axis control modules of the intelligent control module. The data calculated by the intelligent control module is then transmitted wirelessly to the motion signal transmission module, which in turn transmits the electrical signals of the calculated data to the motion execution module. The motion execution module then inputs commands to the frequency converter, which in turn controls the actuator to move the pile driver and assist in borehole preparation. This fully automated construction control system enables large-diameter down-the-hole hammer borehole preparation, reducing manpower consumption and improving efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a flowchart of the present invention;

[0024] Figure 2 This is a system diagram of the intelligent control unit of the present invention;

[0025] Figure 3 This is a diagram of the control mechanism of the present invention.

[0026] Explanation of the labels in the diagram:

[0027] 1. Main control unit; 2. Intelligent control module; 3. X-axis control module; 4. Y-axis control module; 5. Cloud data platform; 6. Wireless transmission module; 7. Motion signal transmission module; 8. Motion execution module; 9. Electric actuator; 10. Control mechanism; 11. Verticality sensor; 12. Bottom position display device of down-the-hole hammer; 13. Hole depth sensor; 14. Frequency converter cabinet. Detailed Implementation

[0028] 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.

[0029] Please see Figure 1-3 In this implementation plan:

[0030] Example: Down-the-hole hammer for pilot hole construction

[0031] S1. Collect soil samples at different depths underground at the borehole location, and use a soil analyzer to analyze the soil at these different depths to determine the geological characteristics at these different depths.

[0032] The soil at the pilot borehole location is drilled and sampled using a sampling drilling rig in conjunction with a spiral drill rod and a rotary soil sampling drill. Different down-the-hole hammers with varying parameters are selected based on geological conditions and the characteristics of the thick overburden. These geological conditions and stratigraphic characteristics are referred to as geological features. Geological features can be categorized into two main types according to their formation process: A. Complex strata formed by tectonic movements. The pressure, tension, and shear forces generated by tectonic movements cause joints, fissures, cracks, faults, and foliation in the rock strata. In particular, hard or medium-hard brittle rocks are subjected to severe tectonic forces, forming complex strata. B. Complex strata formed by external geological forces, namely weathered layers, alluvial layers, diluvial layers, and aeolian layers. Weathering transforms rock strata into loosely lithified, poorly cemented weathered layers, while various sedimentary layers formed by alluvial, diluvial, and aeolian processes generally contain clay, quicksand, pebbles, gravel, and boulders, thus creating complex strata.

[0033] S2. Based on the geological characteristics of different depths at the test-tested pilot hole locations, determine the parameters of the large-diameter down-the-hole hammer and the auxiliary automatic pilot hole equipment;

[0034] In this example, the parameters for selecting the down-the-hole hammer are as follows:

[0035] Maximum drilling diameter, maximum drilling depth, overall dimensions, engine parameters, power head, main winch, auxiliary winch, pressurized winch, mast inclination angle, etc.

[0036] Among them, the maximum drilling diameter is the drilling diameter of the down-the-hole hammer; the maximum drilling depth is the length of the down-the-hole hammer; the power head is a power unit that can realize the main motion and feed motion and has automatic workpiece circulation; the main winch is used to raise and lower the drill bit, and also to raise and lower the casing; the auxiliary winch is used to assist the main winch in its work; the pressure winch is used to pressurize the power head; the mast inclination angle is an angle between the mast and the vertical line, which is generally controlled at about 15°.

[0037] The parameters for selecting the piling machine in this example are as follows:

[0038] Maximum pile driving force (t), maximum working hydraulic pressure of the main unit, maximum working hydraulic pressure of the crane, number of pile driving speed settings, single longitudinal displacement, single lateral displacement, single rotation angle, lifting stroke, etc. Among them, the maximum pile driving force is used to control the pile driving speed and pile driving stroke of the pile driver; single longitudinal displacement and single lateral displacement are the strokes of the pile driver that can control the single longitudinal and single lateral movement of the down-the-hole hammer; lifting stroke is the lifting distance of the pile driver controlling the down-the-hole hammer; the number of pile driving speed settings is the adjustment of different speeds when the pile driver is working.

[0039] S3. During construction, adjust the parameters of the automatic drilling equipment according to the actual conditions at the drilling site.

[0040] In this example, when drilling in hard rock formations with relatively hard geology, the optimal single-turn angle is approximately 11°. When adjusting the pile driver parameters, the pile driving speed setting can be adjusted based on the following data:

[0041] The overburden is 40–60 r / min; soft rock is 30–50 r / min; medium-hard rock is 20–40 r / min; and hard rock is 10–30 r / min.

[0042] In this example, when drilling in geological strata with limestone (classified as sedimentary rock by genetic origin), the selected piling machine parameters can be: low speed range of 20 r / min to 40 r / min; maximum pile driving force (t) of 800 t; maximum working hydraulic pressure of the main unit of 26 MPa; maximum working hydraulic pressure of the crane of 20 MPa; maximum theoretical pile driving speed of 8.8 m / min; 4 speed settings; single longitudinal displacement of 3.5 m; single lateral displacement of 0.7 m; and single rotation angle of 11°. The down-the-hole hammer can be a medium-frequency, high-impact hammer paired with a carbide ball-tooth drill bit. The drill bit specifications can be φ380, φ360, φ340, φ273, φ219, and φ168.

[0043] S4. During the construction process, the large-diameter down-the-hole hammer power head and automatic drilling equipment are controlled by the frequency converter cabinet (14) to drill holes. At the same time, the automatic drilling equipment is controlled by the control mechanism (10) to assist in the drilling construction.

[0044] Please see Figure 2 The drilling device is controlled by an intelligent control unit, which includes a main control terminal 1, an intelligent control module 2, a wireless transmission module 6, a motion signal transmission module 7, and a motion execution module 8. The intelligent control module 2 is connected to the main control terminal 1, the wireless transmission module 6 is connected to the intelligent control module 2, the motion signal transmission module 7 is connected to the wireless transmission module 6, and the motion execution module 8 is connected to the motion signal transmission module 7.

[0045] In this example, the main control terminal 1 is used to globally control the intelligent control module 2, the wireless transmission module 6, the motion signal transmission module 7, and the motion execution module 8. For example, it controls the intelligent control module 2, the wireless transmission module 6, the motion signal transmission module 7, and the motion execution module 8 to start and stop. The intelligent control module 2 is used to process and analyze the movement direction of the pile driver and the down-the-hole hammer. The wireless transmission module 6 is used to transmit the movement direction of the pile driver and the down-the-hole hammer processed by the intelligent control module 2 to the motion signal transmission module 7. The motion execution module 8 is used to control the pile driver to execute the commands issued by the intelligent control module 2. The intelligent control module 2 includes an X-axis control module 3 and a Y-axis control module 4. The X-axis control module 3 is used to process the direction of movement of the pile driver along the X-axis, and the Y-axis control module 4 is used to process the direction of movement of the pile driver along the Y-axis.

[0046] The drilling equipment is equipped with a control mechanism 10, which includes a verticality sensor 11, a downhole hammer bottom position display device 12, a drilling depth sensor 13, a frequency converter cabinet 14, and an electric actuator 9.

[0047] Please see Figure 3 The verticality sensor 11 is used to detect the verticality of the down-the-hole hammer to the ground. In some embodiments, the verticality sensor 11 may be, for example, a vertical Hall sensor. The down-the-hole hammer bottom position display device 12 is used to observe and display the position of the down-the-hole hammer bottom relative to the ground. In some embodiments, the down-the-hole hammer bottom position display device 12 may be, for example, an image sensor. The pilot hole depth sensor 13 is used to acquire the depth of the down-the-hole hammer entering the ground during pilot hole construction. In some embodiments, the depth sensor may be a laser depth sensor. The frequency converter cabinet 14 is a control cabinet that uses a frequency converter to drive the power unit. The frequency converter cabinet 14 is used to provide frequency conversion power to the motor to change the motor speed, and to control the operation of the electric actuator 9 by providing frequency conversion power to the motor in the electric actuator 9. The electric actuator 9 is used to control the pile driver to adjust the height and position of the down-the-hole hammer. The electric actuator 9 is connected to the motion execution module 8.

[0048] In this example, the principle of the laser depth sensor is as follows:

[0049] A laser depth sensor emits a pulse from a laser source, and the sensor detects the reflection of this pulse on the target object to record its time of flight. By utilizing the constant speed of light, the system can calculate the distance to the target object.

[0050] During the pilot hole construction, the bottom position display device 12 of the down-the-hole hammer is used to observe and display the bottom of the down-the-hole hammer relative to the ground and the predetermined pilot hole position. The X-axis control module 3 and Y-axis control module 4 of the intelligent control module 2 calculate the longitudinal and lateral movement distance of the down-the-hole hammer, and transmit the data calculated by the intelligent control module 2 to the motion signal transmission module 7 through the wireless transmission module 6. The motion signal transmission module 7 transmits the electrical signal of the calculated data to the motion execution module 8. The motion execution module 8 inputs instructions to the frequency converter, and the frequency converter controls the actuator to control the pile driver to move the down-the-hole hammer for auxiliary pilot hole construction.

[0051] S5. Upload the borehole construction data to the cloud data platform (5);

[0052] The wireless transmission module 6 is connected to the cloud data platform 5, which is used to store data related to the construction process of the pilot hole (such as video data, image data, etc. during the pilot hole construction process) for easy storage and subsequent viewing.

[0053] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A method for pilot-hole drilling with a large-diameter down-the-hole hammer in conjunction with vibratory compaction, characterized in that, Includes the following steps: S1. Collect soil samples at different depths underground at the borehole location, and use a soil analyzer to analyze the soil at these different depths to determine the geological characteristics at these different depths. By using a sampling drilling rig in conjunction with a spiral drill rod and a rotary soil sampling drill, the soil at the pilot hole location is drilled and sampled. Based on the geological conditions and the characteristics of the thick overburden strata, different parameters of down-the-hole hammers are selected. The geological features are divided into two main categories according to the different formation processes of the strata: complex strata formed by tectonic movements and complex strata formed by external geological forces. S2. Based on the geological characteristics of different depths at the test drilling locations, determine the parameters of the large-diameter down-the-hole hammer and the automatic drilling equipment; The automatic drilling equipment includes a pile driver, an air compressor, a down-the-hole hammer, an intelligent control unit, and a control mechanism; The automatic drilling device is controlled by the intelligent control unit, which includes a main control terminal, an intelligent control module, a wireless transmission module, a motion signal transmission module, and a motion execution module. The intelligent control module is connected to the main control terminal, the wireless transmission module is connected to the intelligent control module, the motion signal transmission module is connected to the wireless transmission module, and the motion execution module is connected to the motion signal transmission module. The intelligent control module includes an X-axis control module and a Y-axis control module. The X-axis control module is used to process the direction of movement of the pile driver along the X-axis, and the Y-axis control module is used to process the direction of movement of the pile driver along the Y-axis. The control mechanism includes a verticality sensor, a down-the-hole hammer bottom position display device, a pilot hole depth sensor, a frequency converter cabinet, and an electric actuator. The verticality sensor is used to detect the verticality of the down-the-hole hammer to the ground. The down-the-hole hammer bottom position display device is used to observe and display the situation of the bottom of the down-the-hole hammer relative to the ground. The pilot hole depth sensor is used to acquire the depth of the down-the-hole hammer into the ground during pilot hole construction. The frequency converter cabinet is used to control the operation of the electric actuator. Starting the actuator is used to control the pile driver to adjust the height and position of the down-the-hole hammer. The electric actuator is connected to the motion execution module. The selection parameters for the down-the-hole hammer include: maximum borehole diameter, maximum borehole depth, overall dimensions, engine parameters, power head, main winch, auxiliary winch, pressurized winch, and mast inclination. The parameters for selecting the pile driver are as follows: maximum pile driving force, maximum working hydraulic pressure of the main unit, maximum working hydraulic pressure of the crane, number of pile driving speed levels, single longitudinal displacement, single lateral displacement, single rotation angle, and lifting stroke; S3. During construction, adjust the parameters of the automatic drilling equipment according to the actual conditions at the drilling site. When drilling in hard rock formations, the single rotation angle is 11°. When adjusting the pile driver parameters, the pile driving speed setting should be adjusted according to the following data: 40-60 r / min for overburden; 30-50 r / min for soft rock; 20-40 r / min for medium-hard rock; and 10-30 r / min for hard rock. S4. During the construction process, the large-diameter down-the-hole hammer power head and automatic drilling equipment are controlled by the frequency converter cabinet to drill holes. At the same time, the automatic drilling equipment is coordinated and controlled by the control mechanism to assist the drilling construction. S5. Upload the pilot hole construction data to the cloud data platform.

2. The method for large-diameter down-the-hole hammer pilot hole preparation in conjunction with vibratory compaction as described in claim 1, characterized in that: The central control unit is used to perform global control of the intelligent control module, the wireless transmission module, the motion signal transmission module, and the motion execution module. The intelligent control module is used to process and analyze the movement direction of the pile driver and the down-the-hole hammer. The wireless transmission module is used to transmit the movement direction of the pile driver and the down-the-hole hammer processed by the intelligent control module to the motion signal transmission module. The motion execution module is used to control the pile driver to execute the commands issued by the intelligent control module.

3. The method for large-diameter down-the-hole hammer pilot hole preparation in conjunction with vibratory compaction as described in claim 2, characterized in that: The wireless transmission module is connected to a cloud data platform, which is used to store the construction process and data of the pilot hole.

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