CN118895792B - Foundation pit rotary spray injection reinforcement imaging method and device based on carbon powder reinforced three-dimensional printing conductive material - Google Patents

Abstract

The invention relates to the technical field of geological engineering, and discloses a foundation pit rotary spray injection reinforcement imaging method and device based on carbon powder reinforced three-dimensional printing conductive materials. The technical problems that in the prior art, a real-time monitoring and evaluating means is lacking in a foundation pit reinforcing process, a reinforcing effect is difficult to guarantee and reinforcing quality cannot be evaluated are solved. The foundation pit rotary spray injection reinforcement imaging method based on carbon powder reinforced three-dimensional printing conductive material comprises the steps of material preparation, 3D printing of conductive elements, rotary spray injection, resistivity data capturing and three-dimensional imaging. The foundation pit rotary spray injection reinforcing imaging device based on carbon powder reinforced three-dimensional printing conductive material comprises a mixer, a three-dimensional printer, a cleaning solidification device, rotary spray injection equipment and a resistivity imaging instrument. The invention not only improves the construction efficiency and the engineering quality, but also provides a new solution for monitoring and maintaining in the field of underground engineering.

Description

Foundation pit rotary spray injection reinforcement imaging method and device based on carbon powder reinforced three-dimensional printing conductive material

Technical Field

The invention relates to the technical field of geological engineering, in particular to a foundation pit rotary spray injection reinforcement imaging method and device based on carbon powder reinforced three-dimensional printing conductive materials.

Background

The foundation pit reinforcement is mainly used for improving stability and bearing capacity of the foundation pit and preventing collapse and settlement in geological engineering. The stability of the foundation pit directly affects the safety of the foundation and the superstructure, and especially in building and infrastructure engineering, foundation pit reinforcement is important. At present, foundation pit reinforcement technology mainly comprises a rotary spray irrigation injection method, an anchor rod reinforcement method, a soil nailing wall reinforcement method and the like. The rotary spraying pouring method has the advantages of wide application range, high construction speed, good reinforcement effect and the like, and is widely applied to foundation reinforcement engineering. Spin-spray injection is a technique in which grouting materials (such as cement slurry, chemical slurry, etc.) are injected into a crack, cavity, or weak layer of a foundation by high pressure. Through high-pressure injection and rotation, the grouting material can be fully mixed and solidified with the soil body of the foundation to form a reinforcing body, so that the bearing capacity and stability of the foundation are improved. However, the formation and distribution of the reinforcement bodies during rotary injection is difficult to monitor and evaluate in real time. Once cracks, hollows or other defects appear in the reinforcement body, the cracks, hollows or other defects are difficult to discover and repair in time, so that the reinforcement effect is poor, and even potential safety hazards appear. Conventional methods rely primarily on post quality testing, such as sampling and field testing, but these methods are often late and do not fully reflect the internal quality of the reinforcement. Uniformity and integrity of the reinforcement are difficult to ensure because the reinforcement process cannot be monitored in real time. There is the quality difference in the reinforcement body inside, leads to strengthening effect inhomogeneous, influences the overall stability of foundation ditch. The existing construction process and technical means are difficult to comprehensively control and optimize the reinforcement process, so that some potential problems are found after the construction is completed, and the difficulty and cost of maintenance and repair are increased. The existing reinforcement technology mainly depends on construction experience and field detection, and is difficult to comprehensively evaluate the internal quality of the reinforcement body. Once the reinforcement effect is not ideal, re-reinforcement may be required, increasing construction costs and time. In addition, due to the lack of scientific evaluation standards and methods, objective comparison and evaluation of reinforcement effects of different construction processes and materials are difficult, thereby affecting improvement and optimization of technology. In the conventional spin-spray injection method, the shape and size of the conductive element used are often difficult to precisely control, so that the resistivity distribution is uneven in the reinforcing process, and the monitoring effect of the resistivity imaging technology is affected. In addition, the conductive elements manufactured by the conventional method may have manufacturing defects such as holes, cracks, etc., which further affect the quality and reinforcing effect of the reinforcing material.

Based on the method, the invention provides a foundation pit rotary spray injection reinforcement imaging method based on carbon powder reinforced three-dimensional printing conductive material, the shape, the size and the distribution of the carbon powder reinforced conductive material can be precisely controlled by a three-dimensional printing technology, the uniformity and the monitoring accuracy of the reinforcement process are improved, simultaneously, the real-time monitoring and evaluation of the reinforcement process can be realized by combining with a resistivity imaging technology, the engineering quality and the safety are ensured, and the construction efficiency and the construction effect are greatly improved. With the continuous development of material science, three-dimensional printing technology and geological engineering technology in the future, the method is expected to be popularized and applied in more fields.

Disclosure of Invention

In view of the above technical problems, the present disclosure provides a foundation pit spin-spray injection reinforcement imaging method and device based on carbon powder reinforced three-dimensional printing conductive material, which solve the technical problems in the prior art that the foundation pit reinforcement process lacks real-time monitoring and evaluation means, the reinforcement effect is difficult to guarantee, and the reinforcement quality cannot be evaluated.

According to one aspect of the present disclosure, there is provided a foundation pit spin-spray injection reinforcement imaging method based on carbon powder reinforced three-dimensional printed conductive material, comprising the steps of:

(1) Mixing carbon powder with a polymer matrix material to prepare a carbon powder reinforced three-dimensional conductive material;

(2) Printing the mixed carbon powder reinforced three-dimensional conductive material into a conductive element by a three-dimensional printer;

(3) In the process of foundation pit reinforcement, embedding a conductive element into grouting materials by rotary sprinkling irrigation equipment and injecting the grouting materials into a foundation crack, a cavity or a weak layer, mixing and solidifying the grouting materials with a foundation soil body to form a reinforcement body with conductivity and real-time monitoring performance;

(4) Capturing resistivity data, namely monitoring the resistivity change of the inside of the reinforcing body in real time through resistivity imaging along with the gradual formation of the reinforcing body, so as to evaluate the formation and distribution condition of the reinforcing body;

(5) Three-dimensional imaging, namely analyzing the collected resistivity imaging data to generate a three-dimensional imaging diagram of the reinforcing body.

In some embodiments of the present disclosure, the particle size of the carbon fines in step (1) is less than 50 microns.

In some embodiments of the present disclosure, the polymer matrix material is an epoxy or polyethylene.

In some embodiments of the present disclosure, the mixing ratio of the carbon powder to the polymer matrix material is 15% to 85%.

In some embodiments of the present disclosure, the conductive element in the step (2) is in a mesh or grid structure to form a uniform resistivity distribution in the reinforcement body, the conductive element is sized to be 30mm long, 15mm wide and 5mm high to meet the ejection requirements and avoid clogging, and the conductive element printing parameters are set to be 0.1 mm thick, 50 mm/s at printing speed and 200 ℃ at printing temperature to ensure the printed conductive element size and mechanical properties.

In some embodiments of the present disclosure, after the printing of the conductive element in step (2), a step of post-treating the conductive element is further included before step (3), wherein the post-treatment includes cleaning and curing.

The foundation pit rotary spray grouting reinforcement imaging device based on the carbon powder reinforced three-dimensional printing conductive material is suitable for the foundation pit rotary spray grouting reinforcement imaging method based on the carbon powder reinforced three-dimensional printing conductive material, and comprises a mixer, wherein a carbon powder inlet and a polymer matrix material inlet are formed above the mixer, a material outlet of the mixer is connected with a material inlet of a three-dimensional printer, a conductive element outlet of the three-dimensional printer is connected with a cleaning solidification device, an outlet end of the cleaning solidification device is connected with an inlet end of rotary spray grouting equipment, grouting materials are contained in the rotary spray grouting equipment to embed the conductive element into the grouting materials and spray the grouting materials into a foundation to form a reinforcement body with conductivity and real-time monitoring performance, and the reinforcement body is connected with a resistivity imaging instrument.

In some embodiments of the present disclosure, the mixer is a V-shaped mixer, the V-shaped mixer includes a V-shaped mixing bin, carbon powder inlet and polymer matrix material inlet are set up respectively at V-shaped mixing bin top both ends, and the V-shaped mixing bin bottom sets up the compounding export, the V-shaped mixing bin runs through and sets up stirring subassembly, stirring subassembly includes the rotation motor, the power output shaft of rotation motor connects the axis of rotation, the axis of rotation runs through the V-shaped mixing bin, the axis of rotation middle part is located the V-shaped stirring bin and sets up a plurality of stirring rake.

In some embodiments of the present disclosure, the rotating shaft end is provided on the support frame via a rotating bearing.

In some embodiments of the disclosure, the cleaning and curing device comprises an ultrasonic cleaner comprising a housing, a cleaning tank is arranged in the housing to hold cleaning liquid, a transducer is arranged between the housing and the cleaning tank, the transducer comprises a plurality of ultrasonic vibrators to convert the sound energy of a power ultrasonic frequency source into mechanical vibration, ultrasonic waves are radiated to the cleaning liquid in the cleaning tank through the wall surface of the cleaning tank, and a basket is arranged in the cleaning tank to hold elements to be cleaned.

In some embodiments of the disclosure, the basket is connected with a lifting assembly, the lifting assembly comprises a bracket installed at the bottom of the basket, a buckle piece capable of buckling the basket is arranged on the bracket, the bracket is connected with one side of a lifting rod, a roller is installed on the other side of the lifting rod, and a sliding rail is arranged on the side wall of the cleaning tank to be matched with the roller for walking.

In some embodiments of the present disclosure, the lifter top mounts a hydraulic cylinder via a connecting plate.

In some embodiments of the disclosure, a cover plate is arranged at the top of the lifting rod, so that the lifting rod covers the top of the cleaning tank during cleaning.

In some embodiments of the present disclosure, a heating device is further disposed on an inner sidewall of the cleaning tank.

The invention has the beneficial effects that:

According to the invention, the carbon powder is introduced to enhance the three-dimensional printing conductive material, so that the conductive performance of the reinforcement body is obviously improved, and further, the real-time monitoring and evaluation of the reinforcement process are realized. By applying the resistivity imaging technology, engineers can know the reinforcing effect in time in the construction process, and engineering quality and safety are ensured. In addition, the method improves the reinforcement efficiency, reduces the construction cost and has wide application prospect.

The carbon powder and the three-dimensional printing material are mixed according to a certain proportion to prepare the three-dimensional printing material with structural strength and good conductivity.

The conductive element with the net-shaped or grid-shaped structure is convenient for forming uniform resistivity distribution in the reinforcement body, the size of the conductive element is designed, the printing parameters are optimized, and the printed element can meet the spraying requirement and can not cause hole blockage.

The high pressure and high speed of the spin injection ensures that the material can go deep into tiny cracks and gaps, and provides comprehensive reinforcing effect.

The resistivity imaging can capture the resistivity distribution condition inside the reinforcing body in real time so as to evaluate the formation and distribution condition of the reinforcing body, the change of resistivity data can reflect the coagulation process of the reinforcing material, the uniformity of the reinforcing body and potential hollows or weaknesses, and the possible problems can be found and processed in time by analyzing the data, so that the reliability of the reinforcing effect is ensured.

The collected resistivity imaging data are analyzed in detail to generate a three-dimensional imaging image of the reinforcing body, the three-dimensional imaging image can intuitively show the structure, uniformity and integrity of the reinforcing body, and the construction process and parameters can be optimized and adjusted based on the analysis results, so that the reinforcing effect is improved.

The V-shaped mixer ensures that the carbon powder is thoroughly mixed with the polymer matrix material, thereby ensuring that the finally printed conductive element has good electrical conductivity and mechanical properties. The conductive element is manufactured by a 3D printing technology, the geometric shape and the size of the conductive element can be precisely controlled, and the conductive element contributes to improving the overall performance of the reinforcing body. The ultrasonic cleaner can effectively remove residues on the surface of the conductive element, and the heating device is favorable for quick solidification, so that the cleanliness and stability of the conductive element are ensured. The reinforcing body is connected with the resistivity imager, so that the conductivity change of the reinforcing body can be monitored in real time, timely feedback is provided for engineering personnel, and the construction parameters can be conveniently adjusted. The conductive element is embedded in the grouting material and is sprayed into the foundation to form a reinforcing body, so that the physical and mechanical properties of the foundation are enhanced, and the conductive element can be used as a part of a sensor network to monitor the foundation state due to the conductivity of the conductive element.

Drawings

FIG. 1 is a flow chart of a foundation pit spin-spray injection reinforcement imaging method based on carbon powder reinforced three-dimensional printed conductive material;

FIG. 2 is a schematic diagram of a mixer configuration;

FIG. 3 is a schematic view of a cleaning solidification device;

FIG. 4 is a left side view of the purge curing unit;

FIG. 5 is a cross-sectional view taken along the A-A plane of FIG. 4;

FIG. 6 is a front view of a purge curing unit;

FIG. 7 is a cross-sectional view taken along the B-B plane in FIG. 6;

The name of each part in the figure is 1, a mixer; 2, a V-shaped mixing bin, 3, a carbon powder inlet, 4, a polymer matrix material inlet, 5, a rotating motor, 6, a rotating shaft, 7, a mixing outlet, 8, a rotating bearing, 9, a support frame, 10, a cleaning solidifying device, 11, a shell, 12, a cleaning tank, 13, a transducer, 14, a bracket, 15, a fastener, 16, a lifting rod, 17, a roller, 18, a sliding rail, 19, a hydraulic cylinder, 20, a cover plate, 21, a heating device, 22 and a connecting plate.

Detailed Description

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.

Example 1

The embodiment discloses a foundation pit rotary spray injection reinforcement imaging method based on carbon powder reinforced three-dimensional printing conductive material, which is shown in fig. 1 to 7;

The method comprises the following steps:

(1) The material is prepared by selecting carbon powder with high purity and uniform particle size, and drying to remove water and impurities. The particle size of the carbon powder is controlled below 50 microns to ensure uniform dispersion in the matrix material. Meanwhile, a polymer with high strength and good corrosion resistance, such as epoxy resin or polyethylene, is selected. According to experimental data, the optimum mixing ratio of carbon fines to polymer matrix material is 15% to 85% (mass ratio) to ensure optimum electrical conductivity and mechanical strength of the final material. In a high speed mixer, the carbon fines are slowly added to the polymer matrix material and stirred for 30 minutes to ensure uniform mixing. Then defoaming is carried out in a vacuum environment, so that bubbles in the mixing process are removed, and the compactness of the material is ensured.

(2) 3D printing of the conductive element, namely designing the structure of the conductive element by utilizing CAD software, wherein the design considers the size and shape of the reinforced body embedded in the foundation pit, and a grid-shaped or grid-shaped structure is generally adopted to ensure uniform resistivity distribution. The conductive dimension is not easy to be oversized to avoid blockage, and can be set to be 30mm long, 15mm wide and 5mm high. Printing parameters including layer thickness (0.1 mm), printing speed (50 mm/s), printing temperature (200 ℃) and the like are set in the 3D printer to ensure that the printed conductive elements have accurate dimensions and good mechanical properties. And loading the mixed materials into a 3D printer, and printing the conductive elements layer by layer according to a designed model. After printing, the conductive element is subjected to post-treatment, such as cleaning, curing and the like, so that the performance stability of the conductive element is ensured.

(3) And (3) rotary sprinkling irrigation, namely checking the state of rotary sprinkling irrigation equipment, and ensuring that the equipment can provide stable high-pressure and high-speed spraying. The equipment mainly comprises a high-pressure pump, a rotary spray head, a grouting pipe and the like. The 3D printed conductive elements and the prefabricated grouting material are respectively loaded into two different bins of the equipment. In the foundation pit reinforcing area, a rotary spray injection device is started, and the conductive element and the grouting material are simultaneously sprayed into a foundation crack, a cavity or a weak layer at a high speed through a rotary spray head. During construction, by adjusting the injection pressure (typically 20-30 MPa) and injection velocity (about 5 m/s), it is ensured that the material is well mixed and filled into all fine cracks and voids.

(4) And (3) capturing resistivity data, namely arranging resistivity imaging equipment around the foundation pit reinforcement area, wherein the resistivity imaging equipment comprises electrodes, a data acquisition device and a computer control system. The electrode spacing and arrangement mode are adjusted according to actual conditions, so that the whole reinforcement area is ensured to be covered. The resistivity imaging system is started to monitor the resistivity change inside the reinforcement body in real time. The acquisition frequency was set to once every 10 minutes to capture subtle changes in the consolidation process. And transmitting the acquired resistivity data to a computer, and processing and analyzing the resistivity data by professional software to generate a resistivity distribution map in the reinforcing body. And judging the formation process and uniformity of the reinforcing body according to the change condition of the resistivity.

(5) And (3) three-dimensional imaging, namely integrating resistivity imaging data with site construction parameters (such as grouting quantity, grouting pressure and the like), and generating a three-dimensional model of the reinforcing body through three-dimensional modeling software. And generating a three-dimensional imaging chart of the reinforcing body by using high-resolution image processing software. The image should clearly show the structure, uniformity and integrity of the stiffener. And carrying out detailed analysis on the generated three-dimensional imaging graph, and evaluating the reinforcement effect. And optimizing and adjusting construction process and parameters according to analysis results, such as grouting amount, injection pressure and the like, so as to improve reinforcement effect and engineering quality.

The foundation pit rotary spray grouting reinforcement imaging device based on the carbon powder reinforced three-dimensional printing conductive material is suitable for the foundation pit rotary spray grouting reinforcement imaging method based on the carbon powder reinforced three-dimensional printing conductive material, and comprises a mixer 1, wherein a carbon powder inlet and a polymer matrix material inlet are formed above the mixer 1, a material outlet of the mixer is connected with a material inlet of a three-dimensional printer, a conductive element outlet of the three-dimensional printer is connected with a cleaning and solidifying device, an outlet end of the cleaning and solidifying device is connected with an inlet end of rotary spray grouting equipment, grouting materials are contained in the rotary spray grouting equipment so as to embed the conductive element into grouting materials to spray the foundation to form a reinforcing body with conductivity and real-time monitoring performance, and the reinforcing body is connected with a resistivity imaging instrument.

The mixer 1 is V-arrangement blender, and V-arrangement blender includes V-arrangement blending bunker 2, and V-arrangement blending bunker 2 top both ends set up carbon powder inlet port 3 and polymer matrix material inlet port 4 respectively, and V-arrangement blending bunker 2 bottom sets up compounding export 7,V shape blending bunker 2 and runs through and set up stirring subassembly, and stirring subassembly is including rotating motor 5, and the power output shaft of rotating motor 5 connects axis of rotation 6, and axis of rotation 6 runs through V-arrangement blending bunker 2, and axis of rotation 6 middle part is located V-arrangement blending bunker 2 and sets up a plurality of stirring rake.

The end of the rotating shaft 6 is arranged on a supporting frame 9 through a rotating bearing 8.

The cleaning and solidifying device 10 comprises an ultrasonic cleaner, the ultrasonic cleaner comprises a shell 11, a cleaning tank 12 for containing cleaning liquid is arranged in the shell 11, a transducer 13 is arranged between the shell 11 and the cleaning tank 12, the transducer comprises a plurality of ultrasonic vibrators for converting sound energy of a power ultrasonic frequency source into mechanical vibration, ultrasonic waves are radiated to the cleaning liquid in the cleaning tank 12 through the wall surface of the cleaning tank 12, and a basket for containing elements to be cleaned is arranged in the cleaning tank 12.

The basket is connected with a lifting assembly, the lifting assembly comprises a bracket 14 arranged at the bottom of the basket, a buckle piece 15 for buckling the basket is arranged on the bracket 14, the bracket 14 is connected with one side of a lifting rod 16, a roller 17 is arranged on the other side of the lifting rod 16, and a sliding rail 18 is arranged on the side wall of the cleaning tank 12 so as to be matched with the roller 17 to walk.

The hydraulic cylinder 19 is arranged on the top of the lifting rod 16 through a connecting plate 22.

A cover plate 20 is arranged on the top of the lifting rod 16, and covers the top of the cleaning tank 12 during cleaning.

A heating device 21 is also provided on the inner side wall of the cleaning tank 12.

In operation, first a material is prepared and carbon fines and polymer matrix material are added to V-shaped mixing silo 2 through inlets 3 and 4, respectively. The rotating motor 5 drives the rotating shaft 6 to rotate, and the stirring paddles positioned in the V-shaped mixing bin 2 stir along with the rotating shaft, so that the carbon refined powder and the polymer matrix are fully mixed. The fully mixed conductive material is output from the mixing outlet 7 and enters the next step. The mixed carbon powder enhances the delivery of the three-dimensional conductive material from the mixer 1 to the material inlet of the three-dimensional printer. Three-dimensional printers print conductive material into desired conductive elements (e.g., mesh or grid-like structures) according to preset parameters (e.g., layer thickness, print speed, print temperature, etc.). The printed conductive element is fed into the purge curing unit 10. In the ultrasonic cleaner, the conductive element is placed in the basket, and the conductive element is cleaned by mechanical vibration generated by the ultrasonic vibrator to remove surface residues. After the cleaning is completed, the conductive element continues to be cured in the cleaning tank 12, and the heating device 21 can accelerate the curing process. The cleaned and cured conductive element is transported from the cleaning curing unit 10 to the inlet end of the spin-spray injection apparatus. The grouting material is filled in the rotary grouting equipment, and when the equipment is started, the conductive element and the grouting material are sprayed into the foundation together. The conductive elements combine with the grouting material to form a conductive reinforcement that enhances the stability and load carrying capacity of the foundation. While the reinforcing body is formed, the resistivity change inside the reinforcing body is monitored in real time by a connected resistivity imager. The collected data is used to generate a three-dimensional image of the reinforcement body to evaluate the reinforcement effect. The whole device realizes the automatic process from material mixing to reinforcement formation and real-time monitoring, and greatly improves the construction efficiency and the monitoring accuracy.

While certain preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (9)

1. A method for foundation pit rotary jetting and grouting reinforcement imaging based on carbon powder enhanced three-dimensional printed conductive materials, characterized in that it comprises the following steps: (1) Material preparation: mixing carbon powder with a polymer matrix material to prepare a carbon powder-reinforced three-dimensional conductive material; (2) 3D printing of conductive elements: The mixed carbon powder reinforced three-dimensional conductive material is printed into conductive elements by a three-dimensional printer; the conductive elements are mesh or grid structures to form a uniform resistivity distribution in the reinforced body; the conductive elements are sized to be 30 mm long, 15 mm wide, and 5 mm high to meet the injection requirements and avoid clogging; the conductive element printing parameters are set to a layer thickness of 0.1 mm, a printing speed of 50 mm/s, and a printing temperature of 200°C to ensure the size and mechanical properties of the printed conductive elements; (3) Rotary jet grouting: During the foundation pit reinforcement process, the conductive elements are embedded in the grouting material through the rotary jet grouting equipment and sprayed into the cracks, voids or weak layers of the foundation. The grouting material is mixed and consolidated with the foundation soil to form a reinforced body with conductive and real-time monitoring properties. (4) Capturing resistivity data: As the reinforcement is gradually formed, the resistivity changes inside the reinforcement are monitored in real time through resistivity imaging, thereby evaluating the formation and distribution of the reinforcement; (5) Three-dimensional imaging: Analyze the collected resistivity imaging data to generate a three-dimensional image of the reinforced body. 2. The method for foundation pit rotary jetting reinforcement imaging based on carbon powder enhanced three-dimensional printed conductive material according to claim 1, characterized in that: the particle size of the carbon powder in step (1) is less than 50 microns. 3. The foundation pit rotary jet injection reinforcement imaging method based on carbon powder enhanced three-dimensional printed conductive material as described in claim 1 is characterized in that: the polymer matrix material is epoxy resin or polyethylene. 4. The method for foundation pit rotary jet injection reinforcement imaging based on carbon powder enhanced three-dimensional printed conductive material as described in claim 1 is characterized in that the mixing ratio of the carbon powder to the polymer matrix material is 15%:85%. 5. The method for foundation pit rotary jet injection reinforcement imaging based on carbon powder enhanced three-dimensional printed conductive material as claimed in claim 1, characterized in that: after the conductive element of step (2) is printed, before step (3), it also includes a step of post-processing the conductive element, and the post-processing includes cleaning and curing. 6. The method for foundation pit rotary jet grouting reinforcement imaging based on carbon powder enhanced three-dimensional printed conductive material as described in claim 5 is characterized in that: a foundation pit rotary jet grouting reinforcement imaging device based on carbon powder enhanced three-dimensional printed conductive material is used, comprising a mixer, a carbon powder inlet and a polymer matrix material inlet are arranged above the mixer, the material outlet of the mixer is connected to the material inlet of the three-dimensional printer, the conductive element outlet of the three-dimensional printer is connected to a cleaning and curing device, the outlet end of the cleaning and curing device is connected to the inlet end of the rotary jet grouting equipment, the rotary jet grouting equipment contains grouting material inside to embed the conductive element into the grouting material and spray it into the foundation to form a reinforced body with conductive and real-time monitoring properties; the reinforced body is connected to a resistivity imager. 7. The method for foundation pit rotary jet injection reinforcement imaging based on carbon powder enhanced three-dimensional printed conductive material as described in claim 6 is characterized in that: the mixer is a V-shaped mixer, the V-shaped mixer includes a V-shaped mixing bin, and the two ends of the top of the V-shaped mixing bin are respectively provided with a carbon powder inlet and a polymer matrix material inlet, and a mixing outlet is provided at the bottom of the V-shaped mixing bin. A stirring component is arranged through the V-shaped mixing bin, and the stirring component includes a rotating motor, and the power output shaft of the rotating motor is connected to a rotating shaft, and the rotating shaft passes through the V-shaped mixing bin, and a plurality of stirring paddles are arranged in the middle of the rotating shaft in the V-shaped stirring bin; the end of the rotating shaft is arranged on a support frame via a rotating bearing. 8. The method for foundation pit rotary jet injection reinforcement imaging based on carbon powder enhanced three-dimensional printed conductive material as described in claim 6 is characterized in that: the cleaning and curing device includes an ultrasonic cleaner, the ultrasonic cleaner includes a shell, a cleaning tank for accommodating cleaning liquid is arranged in the shell, a transducer is installed between the shell and the cleaning tank, the transducer includes a plurality of ultrasonic vibrators to convert the sound energy of the power ultrasonic frequency source into mechanical vibration, and radiate the ultrasonic wave to the cleaning liquid in the cleaning tank through the wall of the cleaning tank, and a net basket for accommodating the components to be cleaned is arranged in the cleaning tank. 9. The method for foundation pit rotary jet injection reinforcement imaging based on carbon powder enhanced three-dimensional printed conductive material as described in claim 8 is characterized in that: the net basket is connected to a lifting component, the lifting component includes a bracket installed at the bottom of the net basket, the bracket is provided with a fastener that can snap the net basket, the bracket is connected to one side of the lifting rod, and the other side of the lifting rod is installed with a roller, and a slide rail is provided on the side wall of the cleaning tank to cooperate with the roller to move; a hydraulic cylinder is installed on the top of the lifting rod through a connecting plate; a cover plate is provided on the top of the lifting rod to cover the top of the cleaning tank during cleaning; a heating device is also provided on the inner wall of the cleaning tank.