Intelligent cement-soil mixing pile construction equipment and construction method thereof

Abstract

This invention discloses an intelligent cement-soil mixing pile construction equipment and its construction method, belonging to the field of foundation treatment technology. The intelligent cement-soil mixing pile construction equipment includes: a frame; a cement mixing pile machine, which is mounted vertically on the frame; a static cone penetration testing (CPPT) device, which is parallel to the cement mixing pile machine and includes a static cone penetration drill rod and a static cone penetration probe. The upper end of the static cone penetration drill rod is connected to a drive device, and the drill rod is mounted vertically. The static cone penetration probe is located at the lower end of the drill rod, below the mixing head; and an intelligent analysis and control device, which is electrically connected to the cement mixing pile machine and the CPPT device. The intelligent analysis and control device includes an inclination sensor, an electromagnetic flowmeter, a depth sensor, a tension sensor, a current sensor, a computer, and a control console.

Description

Technical Field

[0001] This invention relates to the field of foundation treatment technology, and in particular to an intelligent cement-soil mixing pile construction equipment and its construction method. Background Technology

[0002] Cement-soil mixing piles are often used for soft soil foundation reinforcement due to their advantages such as simple and fast construction and minimal disturbance. However, the construction of cement-soil mixing piles is highly concealed, involves many construction procedures, and has closely connected processes. The main construction procedures are carried out underground. In addition, due to the certain interval between the boreholes in the preliminary geological exploration, the construction parameters guided by the geological conditions are not highly adaptable to every pile. All of these factors bring many challenges to the quality control of cement-soil mixing pile construction.

[0003] Currently, cement-soil mixing pile machines are often operated manually. The operator typically maintains the drilling and grouting speed based on the cement dosage specified in the design. However, the cement dosage is determined based on the softest soil layer, making it difficult for the operator to adjust parameters such as the grouting volume according to changes in actual soil layer parameters. Furthermore, the pile length for cement-soil mixing pile construction is usually determined by a "dual control principle," which combines the designed pile length with the pile machine's current value. However, in actual operation, factors such as the power of the construction equipment, its age, and power supply conditions can significantly affect the current value judgment, making precise control of the pile length difficult. If the pile length does not reach the bearing layer, it will seriously affect the construction quality; if it reaches too much of the bearing layer, it will damage the construction equipment and cause waste. Summary of the Invention

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes an intelligent cement-soil mixing pile construction equipment, which provides a method for measuring and analyzing the actual soil properties during cement mixing pile construction, and adjusting construction parameters such as grouting pressure, grouting flow rate, and pile length to improve the construction quality of cement mixing piles.

[0005] This invention also proposes a construction method for an intelligent cement-soil mixing pile construction equipment.

[0006] According to a first aspect of the present invention, an intelligent cement-soil mixing pile construction device includes: a frame; a cement mixing pile machine, which is mounted vertically on the frame and includes a drive device, a mixing shaft, a grout delivery pipe, and a mixing head. The drive device is mounted on the frame, the mixing shaft is mounted vertically at the lower end of the drive device, the mixing head is mounted at the lower end of the mixing shaft, and the grout delivery pipe is connected to the mixing shaft; a static cone penetration testing (CPPT) device, which is parallel to the cement mixing pile machine and includes a static cone penetration drill rod and a static cone penetration probe. The upper end of the static cone penetration drill rod is connected to the drive device and is mounted vertically. The static cone penetration probe is mounted at the lower end of the static cone penetration drill rod and is lower than the mixing head; and an intelligent analysis and control device, which is electrically connected to the cement mixing pile machine and the CPPT device and includes an inclination sensor, an electromagnetic flowmeter, a depth sensor, a tension sensor, a current sensor, a computer, and a control console.

[0007] The intelligent cement-soil mixing pile construction equipment according to the first aspect of the present invention has at least the following beneficial effects: the soil layers to be drilled by the mixing head have all been detected by a static cone penetration test device, and the actual soil layer parameters have been analyzed by an intelligent analysis and control device. By real-time monitoring of data from tilt sensors, electromagnetic flowmeters, depth sensors, tension sensors, and current sensors, construction parameters adapted to the actual soil layers are analyzed and dynamically adjusted. Through the dynamic adjustment of construction parameters to adapt to the actual soil layer parameters during construction, the problem of uneven pile strength distribution caused by soil layer differences is improved. By comprehensively analyzing the designed pile length, the current value of the pile driver after the mixing head enters the bearing layer, and the actual soil layer parameters detected by the static cone penetration test device, the construction pile length is comprehensively determined, increasing the adaptability of the construction pile length to the actual soil layer.

[0008] According to some embodiments of the present invention, multiple tilt sensors are provided, which are respectively installed on the static cone penetration drill rod and the stirring shaft. The multiple tilt sensors are used to detect the perpendicularity of the stirring shaft and the static cone penetration drill rod to the ground.

[0009] According to some embodiments of the present invention, an electromagnetic flow meter is installed on the grout delivery pipe, and the electromagnetic flow meter is used to detect the grouting volume.

[0010] According to some embodiments of the present invention, the cement mixing pile machine also includes a winch, which is mounted on the frame and connected to the drive device via a wire rope. The winch is used to drive the mixing shaft and the static penetration drill rod to move up and down, and the depth sensor is mounted on the wire rope.

[0011] According to some embodiments of the present invention, a tension sensor is installed on the winch, and the tension sensor is used to detect the tension value when the winch is operating.

[0012] According to some embodiments of the present invention, a current sensor is installed on the cement mixing pile machine, and the current sensor is used to detect the current of the motor of the cement mixing pile machine.

[0013] A construction method for an intelligent cement-soil mixing pile construction device according to a second aspect embodiment of the present invention includes:

[0014] Step 1: Level the site;

[0015] Step 2: Lay out the layout, determine the pile positions of the mixing piles, and mark the corresponding construction points of the mixing piles and static cone penetration tests;

[0016] Step 3: The intelligent cement-soil mixing pile construction equipment undergoes self-inspection and relocation:

[0017] Step 4: Based on the design data, the soil to be treated is divided into layers according to the soil layer parameters, and the layers from the surface layer downwards are pre-defined as A1, A2, A3, A4, and A5.

[0018] Step 5: Use a static cone penetration test to determine the soil parameters of each soil layer;

[0019] Step 6: Cement-soil mixing construction.

[0020] According to some embodiments of the present invention, step 3 includes:

[0021] Step 3.1: After powering on, perform preliminary manual analysis on the readings of the electromagnetic flowmeter, depth sensor, tilt sensor, etc., displayed on the control host;

[0022] Step 3.2: Move the piling machine to the corresponding location, ensuring that the mixing head of the piling machine's mixing shaft and the static cone penetration test probe are aligned with the layout mark point;

[0023] Step 3.3: Correct the verticality of the pile driver's mixing shaft and the static penetration drill rod.

[0024] According to some embodiments of the present invention, step 5 includes:

[0025] Step 5.1: Turn on the power switch, preheat and adjust to normal working condition;

[0026] Step 5.2: Start the pile driver drive device and pressurize it to press the static cone penetration probe into the soil. The horizontal height of the static cone penetration probe should be 2m lower than the mixing head of the cement-soil mixing pile.

[0027] Step 5.3: Maintain a constant penetration speed until the A1 soil layer is penetrated;

[0028] Step 5.4: Analyze the cone tip resistance value and sidewall resistance value obtained by the intelligent analysis and control device through the preset program, accurately reflect the numerical relationship between soil depth and cone tip resistance and sidewall resistance, and comprehensively analyze the construction parameters such as cement admixture, drilling speed, and grouting speed given in the design documents to control the drilling speed and grouting volume of the cement-soil mixing pile machine drill rod.

[0029] Step 5.5: Compare the A1 soil layer parameters obtained by the static cone penetration test with the preset A1 soil layer parameters: If the preset A1 soil layer thickness is greater than 2m, the preset A1 soil layer is divided into sub-soil layers at 2m intervals. Determine whether the parameters of each sub-soil layer are the same as the design. If not, replace the preset A1 sub-soil layer parameters with the actual soil layer parameters after analysis. After completion, determine the soil layer parameters of the next sub-soil layer.

[0030] Step 5.6: Repeat steps 5.2 to 5.5 until the static cone penetration test probe is about to drill into the design pile bottom within 2m. Then, start the pile length determination program. Use the tension sensor installed on the transmission chain and the current sensor installed on the motor to collect the tension and current values ​​when the current exceeds the rated current and is maintained for 10 seconds as the limit values. Combine the soil layer parameters fed back by the static cone tip resistance and side wall resistance with the design data to determine the construction pile length of the mixing pile.

[0031] According to some embodiments of the present invention, step 6 includes:

[0032] Step 6.1: Start the cement-soil mixing pile machine. After the static penetration probe is inserted 2m into the soil, the mixing head of the cement-soil mixing pile machine is pressurized and inserted into the soil with the drive device. According to the instructions given by the intelligent analysis and control device based on the soil layer parameters, cement slurry is sprayed, and the mixing blades on the mixing drill head fully mix the solid material and the soil.

[0033] Step 6.2: Maintain continuous monitoring and recording of the electromagnetic flowmeter, depth sensor, tilt sensor, tension sensor installed on the cement-soil mixing pile machine and the current sensor installed on the motor;

[0034] Step 6.3: When the static cone penetration probe and the cement-soil mixing pile machine mixing head are drilling simultaneously, maintain a uniform penetration speed and control the verticality of the drill rod.

[0035] Step 6.4: When the construction pile length is reached, reverse the pressure device, start lifting and stirring, until the mixing head is raised to a height of 0.4m above the original ground.

[0036] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0038] Figure 1 This is a structural schematic diagram of the intelligent cement-soil mixing pile construction equipment according to an embodiment of the present invention.

[0039] Figure label:

[0040] 100 racks;

[0041] Cement mixing pile machine 200; drive unit 210; mixing shaft 220; grout delivery pipe 230; mixing head 240; winch 250; wire rope 260;

[0042] Static cone penetration test acquisition device 300; static cone penetration drill rod 310; static cone penetration probe 320;

[0043] Intelligent analysis and control device 400; tilt sensor 410; electromagnetic flowmeter 420; depth sensor 430; tension sensor 440; current sensor 450; computer 460; control console 470. Detailed Implementation

[0044] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0045] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0046] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0047] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0048] refer to Figure 1 This invention describes an intelligent cement-soil mixing pile construction equipment and its construction method according to embodiments of the present invention.

[0049] like Figure 1 As shown, the intelligent cement-soil mixing pile construction equipment according to an embodiment of the present invention includes: a frame 100; a cement mixing pile machine 200, which is mounted vertically on the frame 100 and includes a drive device 210, a mixing shaft 220, a grouting pipe 230, and a mixing head 240. The drive device 210 is mounted on the frame 100, the mixing shaft 220 is mounted vertically at its lower end, the mixing head 240 is mounted at its lower end, and the grouting pipe 230 is connected to the mixing shaft 220; and a static cone penetration testing device 300, which is parallel to the cement mixing pile machine 200. The device 300 includes a static cone penetration test rod 310 and a static cone penetration probe 320. The upper end of the static cone penetration test rod 310 is connected to the drive device 210. The static cone penetration test rod 310 is set in the vertical direction. The static cone penetration probe 320 is set at the lower end of the static cone penetration test rod 310 and is lower than the mixing head 240. The intelligent analysis and control device 400 is electrically connected to the cement mixing pile machine 200 and the static cone penetration test acquisition device 300. The intelligent analysis and control device 400 includes an inclination sensor 410, an electromagnetic flowmeter 420, a depth sensor 430, a tension sensor 440, a current sensor 450, a computer 460, and a control console 470.

[0050] like Figure 1 As shown, the cement-soil mixing pile machine includes a grouting pipe 230, a mixing shaft 220, and a drive unit 210. The drive unit 210 is connected to the mixing shaft 220. The lower end of the mixing shaft 220 is equipped with a clamp for limiting movement and a mixing head 240. The mixing head 240 consists of rotating mixing blades and a grouting nozzle. The grouting pipe 230 is connected to the mixing shaft 220. A static cone penetration test device is installed outside the cement-soil mixer. The top of the static cone penetration drill rod 310 is installed and connected below the drive unit 210 for downward pressure. The static cone penetration probe 320 is horizontally positioned 2m below the bottom of the mixing head 240. The intelligent analysis and control device 400 consists of an inclination sensor 410, an electromagnetic flowmeter 420, a depth sensor 430, a tension sensor 440, a current sensor 450, a computer 460, and a control console 470.

[0051] In actual use, the mixing head 240 of the cement-soil mixing pile machine is driven by a motor in the drive device 210 to rotate, press down, and lift. The grouting volume is measured by a battery flow meter installed on the grouting pipe 230. The current and tension values ​​during the operation of the cement-soil mixing pile machine can be measured by current sensor 450 and tension sensor 440 to identify the pile length after entering the bearing layer. The drive device 210 of the cement-soil mixing pile machine is equipped with an adjustable speed motor, which is connected to a frequency converter. The frequency converter is connected to an intelligent analysis and control device 400, which can control the drilling speed of the drill rod during drilling and lifting. The double-bridge static cone penetration test probe 320 is a double-bridge probe that can measure the cone tip resistance and sidewall resistance of the soil layer. During construction, the horizontal height of the double-bridge probe should be two meters lower than the mixing head 240 of the pile machine. The measured data is transmitted wirelessly or via wired to the intelligent analysis and control device 400 to analyze and obtain the soil parameters of the stratum where the static cone penetration test probe 320 is located. The tilt sensor 410 is installed on the drill frame. An iron block is welded to the drill rod frame using a welding machine, and then two Φ4 screws are used to fix the tilt sensor 410 to the iron block. The tilt sensor 410 measures angles in two directions: front-back and left-right. Tilt measurement ensures the perpendicularity of the pile driver's mixing shaft 220 and the static probe drill rod to the ground. The electromagnetic flowmeter 420 is installed by disconnecting the existing grouting pipe at a suitable point on the drill rig and then connecting the flowmeter in series. During installation, the arrow of the electromagnetic flowmeter 420 must be aligned with the actual flow direction of the cement slurry. A corresponding reducer should be selected based on the diameter of the existing grouting pipe, and the connection should be secured with clamps or wire. A depth sensor 430 is installed on the steel wire rope 260 of the cement-soil mixing pile driver. The depth sensor 430 includes a photoelectric encoder and a transmission component base. The photoelectric encoder is driven by the transmission steel wire rope 260 through the transmission component. On the piling machine derrick, select a suitable location to drill a hole. Securely fix the depth sounder to the derrick with screws. Loosen the clamping wheel and place the transmission wire rope 260 between the clamping wheel and the transmission wheel. Fine-tune the depth sounder base to ensure the transmission wire rope 260 is in the normal driving position. Then, fix the base and adjust the clamping force between the clamping wheel and the transmission wheel to ensure that the transmission wire rope 260 does not slip and drive the rotating wheel to rotate when it moves. Make the rotation of the photoelectric encoder consistent with the linear displacement of the wire rope 260, and connect it to the drive device 210. The speed and depth of drill rod lifting and lowering can be recorded by connecting to the intelligent analysis and control device 400. The tension sensor 440 is set on the force transmission rope of the winch 250 on the frame 100 to monitor the tension value of the winch 250 in real time during operation. Locate one of the three-phase live wires in the piling machine electrical control cabinet, insert the current sensor 450, and fix the sensor with screws.The intelligent analysis and control device 400, control console 470, and computer 460 are placed next to the drilling rig's operating platform for easy observation and operation by the operator. When in use, the interfaces of the electromagnetic flowmeter 420, depth sensor 430, tilt sensor 410, and current sensor 450 should be connected to the corresponding interfaces on the control console 470, and the power cord should be connected. Then, the power cord should be plugged into a 220V AC power supply.

[0052] The specific construction methods using this intelligent cement-soil mixing pile construction equipment include:

[0053] (1) Level the site;

[0054] (2) Set out the layout, determine the pile positions of the mixing piles, and mark the corresponding construction points of the mixing piles and static cone penetration test.

[0055] (3) Intelligent mixing pile construction equipment performs self-inspection and relocation:

[0056] a. After powering on, perform preliminary manual analysis on the readings of the electromagnetic flowmeter 420, depth sensor 430, tilt sensor 410, etc. displayed on the control host. If the data is abnormal, adjust it to the normal value before starting the construction operation.

[0057] b. Move the piling machine to the corresponding position, ensuring that the piling machine's mixing shaft 220, mixing head 240, and static cone penetration probe 320 are aligned with the layout mark point.

[0058] c. Correct the verticality of the pile driver mixing shaft 220 and static penetration drill rod 310 by adjusting the tilt sensor 410, and control the verticality deviation within 1.0%.

[0059] (4) Based on the design data, the soil to be treated is divided into layers according to the soil layer parameters, and the layers are pre-defined as A1, A2, A3, A4, A5... from the surface layer downwards;

[0060] (5) Static cone penetration test device 2 to determine soil parameters

[0061] a. Turn on the power switch, preheat and adjust to normal working condition, and wait to determine the soil parameters of layer A1;

[0062] b. Start the pile driver drive device and pressurize the static cone penetration probe 320 into the soil. The horizontal height of the static cone penetration probe 320 is two meters lower than the mixing head 240 of the cement-soil mixing pile, and ensure that the verticality deviation is controlled within 1.0% throughout the entire penetration process.

[0063] c. The penetration speed should be controlled at around 0.02 m / s, and a uniform penetration speed should be maintained until the A1 soil layer is penetrated;

[0064] d. The sampling frequency is set at 0.1m per penetration, and the cone tip resistance value and sidewall resistance value are input into the intelligent analysis and control device 400.

[0065] e. The intelligent analysis and control device 400 analyzes the sampled cone tip resistance value and sidewall resistance value through a preset program, accurately reflecting the numerical relationship between soil layer depth and cone tip resistance and sidewall resistance. It also analyzes the given construction parameters such as cement admixture, drilling speed, and grouting speed in the design documents to control the drilling speed and grouting volume of the cement-soil mixing pile machine drill rod during drilling and lifting.

[0066] In step (5)e above, the soil layer parameters for cone tip resistance and sidewall resistance preset in the intelligent analysis and control device 400 are normalized and calculated using the following formula:

[0067] Qt=qn / σv′0

[0068] qn=qt-σv0

[0069] Fr=fs / (qt-σv0)×100%

[0070] In the formula:

[0071] Q t For the normalized cone tip resistance, q n q represents the net cone tip resistance. t To measure the cone tip resistance, σ v0 For the total overlying stress, σ v ′0 is the effective stress of the overlying layer, F r For the normalized friction ratio, f s This is the measured side friction ratio.

[0072] Based on the Robertson soil classification map, the soil layer type in each section can be obtained by using the normalized static cone penetration test information, and the relationship between soil layer parameters and drilling depth can be derived.

[0073] f. Compare the A1 soil layer parameters obtained from the static cone penetration test with the preset A1 soil layer parameters: If the preset A1 soil layer thickness is greater than 2m, the preset A1 soil layer is divided into sub-soil layers A1-1, A1-2, A1-3, etc. at 2m intervals, and it is determined whether the parameters of each sub-soil layer are the same as the design. If not, the preset A1 sub-soil layer parameters are replaced with the actual soil layer parameters after analysis. After completion, the soil layer parameters of the next sub-soil layer are determined. If the preset A1 soil layer thickness is less than or equal to 2m, the soil layer parameters of the soil layer are directly determined according to 5(e).

[0074] g. Repeat step bf above until the static cone penetration probe 320 is about to drill into the design pile bottom within 2m (or is located 1m above the top surface of the bearing layer). Then, start the pile length determination program. Use the tension sensor 440 installed on the transmission chain and the current sensor 450 installed on the motor to collect the tension value and current value when the current exceeds the rated current and is maintained for 10 seconds as the limit value. Combine the soil layer parameters fed back by the static cone tip resistance and side wall resistance with the design data to comprehensively determine the construction pile length of the mixing pile.

[0075] (6) Cement-soil mixing construction

[0076] a. After the cement-soil mixing pile machine is turned on and the static penetration probe 320 is inserted 2m into the soil, the mixing head 240 of the cement-soil mixing pile machine is pressurized and inserted into the soil along with the drive device. According to the instructions given by the intelligent analysis and control device 400 based on the soil layer parameter analysis, cement slurry is sprayed and the mixing blades on the mixing drill head fully mix the solid material and the soil.

[0077] b. Maintain continuous monitoring and recording of the electromagnetic flowmeter 420, depth sensor 430, tilt sensor 410, tension sensor 440 installed on the cement-soil mixing pile machine and the current sensor 450 installed on the motor.

[0078] c. When the static penetration probe 320 and the cement-soil mixing head 240 of the cement-soil mixing pile machine are drilling simultaneously, maintain the penetration speed at about 0.02m / s and maintain a uniform penetration speed. At the same time, the verticality of the drill rod needs to be controlled (the deviation should be controlled within 1.0%).

[0079] d. When the construction pile length determined in (5)f is reached, the pressurization device is reversed, and it is lifted and stirred until the stirring head 240 is lifted to a height of 0.4m above the original ground.

[0080] e. Complete the construction of the cement-soil mixing pile at the pile location.

[0081] During the construction of the mixing pile, because the bottom horizontal height of the static cone penetration test probe 320 is 2 meters lower than the bottom horizontal height of the mixing head 240, the static cone penetration test probe 320 contacts the undisturbed soil before the mixing head 240 during construction. That is, the soil layers drilled by the mixing head 240 have all been tested by the static cone penetration test device, and sufficient time is allowed to adjust the construction parameters to adapt to the actual soil layers.

[0082] Therefore, the soil layers to be drilled by the mixing head 240 have all been detected by the static cone penetration test device, and the actual soil layer parameters have been analyzed by the intelligent analysis and control device 400. By monitoring the data of the tilt sensor 410, electromagnetic flowmeter 420, depth sensor 430, tension sensor 440, and current sensor 450 in real time, the device analyzes and provides construction parameters adapted to the actual soil layers and makes dynamic adjustments. By dynamically adjusting the construction parameters to adapt to the actual soil layer parameters during the construction process, the problem of uneven pile strength distribution caused by soil layer differences is improved. By comprehensively analyzing the designed pile length, the current value of the pile driver after the mixing head 240 enters the bearing layer, and the actual soil layer parameters detected by the static cone penetration test device, the construction pile length is comprehensively judged, increasing the adaptability of the construction pile length to the actual soil layer.

[0083] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A construction method for an intelligent cement-soil mixing pile construction equipment, characterized in that, This intelligent cement-soil mixing pile construction equipment includes: Rack (100); A cement mixing pile machine (200) is mounted on a frame (100) in a vertical direction. The cement mixing pile machine (200) includes a drive device (210), a mixing shaft (220), a grout delivery pipe (230), and a mixing head (240). The drive device (210) is mounted on the frame (100). The mixing shaft (220) is mounted at the lower end of the drive device (210) in a vertical direction. The mixing head (240) is mounted at the lower end of the mixing shaft (220). The grout delivery pipe (230) is connected to the mixing shaft (220). A static cone penetration testing device (300) is provided, which is arranged parallel to the cement mixing pile machine (200). The static cone penetration testing device (300) includes a static cone penetration drill rod (310) and a static cone penetration probe (320). The upper end of the static cone penetration drill rod (310) is connected to the driving device (210). The static cone penetration drill rod (310) is arranged in the vertical direction. The static cone penetration probe (320) is located at the lower end of the static cone penetration drill rod (310) and is lower than the mixing head (240). The intelligent analysis and control device (400) is electrically connected to the cement mixing pile machine (200) and the static penetration acquisition device (300). The intelligent analysis and control device (400) includes an inclination sensor (410), an electromagnetic flowmeter (420), a depth sensor (430), a tension sensor (440), a current sensor (450), a computer (460), and a control console (470). The construction method includes: Step 1: Level the site; Step 2: Lay out the layout, determine the pile positions of the mixing piles, and mark the corresponding construction points of the mixing piles and static cone penetration tests; Step 3: The intelligent cement-soil mixing pile construction equipment undergoes self-inspection and relocation; Step 4: Based on the design data, the soil to be treated is divided into layers according to the soil layer parameters, and the layers from the surface layer downwards are pre-defined as A1, A2, A3, A4, and A5. Step 5: Use a static cone penetration test to determine the soil parameters of each soil layer; Step 6: Cement-soil mixing construction; Step 5 includes: Step 5.1: Turn on the power switch, preheat, and adjust to normal operating condition; Step 5.2: Start the driving device (210) of the pile driver and pressurize it to press the static penetration probe (320) into the soil. The horizontal height of the static penetration probe (320) is 2m lower than the mixing head (240) of the cement-soil mixing pile. Step 5.3: Maintain a constant penetration speed until the A1 soil layer is penetrated; Step 5.4: Analyze the collected cone tip resistance value and sidewall resistance value through the preset program of the intelligent analysis and control device (400), accurately reflect the numerical relationship between soil layer depth and cone tip resistance and sidewall resistance, and comprehensively analyze the construction parameters such as cement admixture amount, drilling speed, and grouting speed given in the design document to control the drilling speed and grouting volume of the cement-soil mixing pile machine drill rod; Step 5.5: Compare the A1 soil layer parameters obtained by the static cone penetration test with the preset A1 soil layer parameters: If the preset A1 soil layer thickness is greater than 2m, the preset A1 soil layer is divided into sub-soil layers at 2m intervals. Determine whether the parameters of each sub-soil layer are the same as the design. If not, replace the preset A1 sub-soil layer parameters with the actual soil layer parameters after analysis. After completion, determine the soil layer parameters of the next sub-soil layer. Step 5.6: Repeat steps 5.2 to 5.5 until the static cone penetration probe (320) is about to drill into the design pile bottom within 2m. Then, start the pile length determination program. The tension and current values ​​collected by the tension sensor (440) installed on the transmission chain and the current sensor (450) installed on the motor when the current exceeds the rated current and is maintained for 10 seconds are used as limit values. Combined with the soil layer parameters fed back by the static cone tip resistance and side wall resistance and the design data, the construction pile length of the mixing pile is determined.

2. The construction method of the intelligent cement-soil mixing pile construction equipment according to claim 1, characterized in that, Step 3 includes: Step 3.1: After powering on, perform preliminary manual analysis on the readings of the electromagnetic flowmeter (420), the depth sensor (430), and the tilt sensor (410) displayed on the control host; Step 3.2: Move the piling machine to the corresponding position, ensuring that the mixing shaft (220), mixing head (240), and static cone penetration probe (320) of the piling machine are aligned with the layout mark point; Step 3.3: Correct the verticality of the mixing shaft (220) and the static penetration drill rod (310) of the piling machine.

3. The construction method of the intelligent cement-soil mixing pile construction equipment according to claim 2, characterized in that, Step 6 includes: Step 6.1: Start the cement-soil mixing pile machine. After the static penetration probe (320) is inserted into the soil for 2m, the mixing head (240) of the cement-soil mixing pile machine is pressurized into the soil along with the drive device (210). Cement slurry is sprayed according to the instructions given by the intelligent analysis and control device (400) based on the soil layer parameter analysis, and the mixing blades on the mixing drill head fully mix the solid material and the soil. Step 6.2: Continuously monitor and record the electromagnetic flowmeter (420), depth sensor (430), tilt sensor (410), tension sensor (440) installed on the cement-soil mixing pile machine, and the current sensor (450) installed on the motor; Step 6.3: When the static penetration probe (320) and the mixing head (240) of the cement-soil mixing pile machine are drilling simultaneously, maintain a uniform penetration speed and control the verticality of the drill rod at the same time; Step 6.4: When the construction pile length is reached, the pressurization device is reversed, and lifting and stirring are started until the stirring head (240) is raised to a height of 0.4m above the original ground.

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