Double-wheel milling cement soil deep mixing wall slurry supply device and method

Abstract

The present application provides a double-wheel milling cement soil deep mixing wall slurry supply device and method, wherein the double-wheel milling cement soil deep mixing wall slurry supply device includes: a slurry supply component, including a grouting pump, a slurry storage box, a return slurry barrel, a slurry supply pipe and a flow meter, the grouting pump inlet is respectively connected to the slurry storage box and a first control valve is provided therebetween, and is connected to the return slurry barrel and a second control valve is provided therebetween, and the grouting pump outlet is connected to the return slurry barrel; an excavation component, including an excavation device, an excavation displacement sensor and a slurry nozzle, the slurry nozzle is connected to the grouting pump outlet through a slurry supply pipe; a control component, including a PLC module and an electric gate valve, the PLC module input end is electrically connected to the excavation displacement sensor and the flow meter, and the output end is electrically connected to the electric gate valve and the grouting pump. The double-wheel milling cement soil deep mixing wall slurry supply device provided by the present application has the advantages of automatically regulating the amount of slurry sprayed, preventing slurry supply interruption due to insufficient slurry storage in the slurry storage box or clogging of the outlet, and ensuring continuous slurry supply.

Description

Technical Field

[0001] The present disclosure generally relates to the technical field of hydropower construction, and in particular to a double-wheel milling cement soil deep mixing wall slurry supply device and method. Background Art

[0002] The Double Wheel Milling Deep Mixing Method (CSM) is a non-soil-extracting wall-forming equipment. It uses a double-wheel milling head to mill the soil. While the hydraulic milling machine breaks up the soil, a pump delivers high-pressure cement slurry and air to the milling head through a guide rod. The slurry is fully mixed with the loosened original material to form an anti-seepage wall, a retaining wall or to improve the stratum. It is a new technology for efficient construction.

[0003] Numerous examples exist domestically and internationally for the construction of cement-soil mixing cut-off walls using twin-wheel milling. However, the construction process is incomplete and lacks tailored methods for addressing specific strata, particularly those with high density and strength variations. During twin-wheel milling, the milling head's settling velocity fluctuates significantly. To ensure uniform cement incorporation within the wall and achieve overall anti-seepage performance, the milling head's grouting volume must also vary accordingly. The dual influence of stratum density classification and strength variations within each stratum type results in frequent fluctuations in the milling head's instantaneous grouting volume. Existing methods, both domestically and internationally, employ conventional pumps for manual variable slurry control or variable frequency pumps and inverters for semi-automatic control, both of which are insufficient. Furthermore, conventional slurry supply stations often experience slurry interruptions due to insufficient slurry storage or blockage in the slurry tank outlet, forcing the twin-wheel milling and shotcreting process to be interrupted. This impacts construction progress and the quality of the deep-mixed wall. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a double-wheel milling cement soil deep mixing wall slurry supply device and method to solve the above-mentioned problems.

[0005] In a first aspect, the present application provides a double-wheel milling cement soil deep mixing wall slurry supply device, comprising a slurry supply component, a tunneling component, and a control component;

[0006] The slurry supply assembly includes: a grouting pump, a slurry storage box, a slurry return barrel, a slurry supply pipe and a flow meter. The inlet of the grouting pump is respectively connected to the slurry storage box and the slurry return barrel, and a first control valve is provided between the inlet of the grouting pump and the slurry storage box, and a second control valve is provided between the inlet of the grouting pump and the slurry return barrel. The outlet of the grouting pump is connected to the slurry return barrel. The flow meter is used to measure the volume flow of the slurry in the slurry supply pipe.

[0007] The excavation assembly includes: an excavation device, an excavation displacement sensor installed on the excavation device, and a slurry nozzle, wherein the slurry nozzle is connected to the grouting pump outlet through the slurry supply pipe;

[0008] The control component includes: a PLC module and an electric gate valve, the electric gate valve is used to control the connection and disconnection between the grouting pump outlet and the slurry return barrel, the input end of the PLC module is electrically connected to the excavation displacement sensor and the flow meter, and the output end is electrically connected to the electric gate valve and the grouting pump.

[0009] According to the technical solution provided in the embodiment of the present application, the slurry supply assembly also includes a pressure sensor. The slurry supply assembly also includes a pressure sensor. The pressure sensor is installed on the slurry supply pipe and electrically connected to the input end of the PLC module for measuring the pressure in the slurry supply pipe.

[0010] According to the technical solution provided in the embodiment of the present application, the outlet of the grouting pump is connected to the top of the slurry return barrel.

[0011] According to the technical solution provided in the embodiment of the present application, the grouting pump, the slurry return barrel, the slurry supply pipe and the flow meter are provided in two groups.

[0012] A second aspect of the present application provides a double-wheel milling cement soil deep mixing wall slurry supply method, comprising the following steps:

[0013] Divide the excavation depth range to obtain several working depth zones;

[0014] Determine the working depth zone, and obtain a first excavation speed in the current working depth zone;

[0015] Obtain the first area of ​​the hydraulic milling head working surface and the first earthwork density of the current working depth area to calculate the excavation earthwork mass;

[0016] Obtain the mass of slurry required for unit mass of earthwork and calculate the theoretical slurry supply mass;

[0017] Obtaining a first slurry volume flow rate and a first slurry density of the supplied slurry, and calculating an actual slurry supply mass;

[0018] The first slurry volume flow rate is adjusted so that the actual slurry supply mass is equal to the theoretical slurry supply mass.

[0019] According to the technical solution provided in the embodiment of the present application, the calculation of the excavation earthwork volume specifically includes:

[0020] The product of the first excavation speed, the first area and the first earthwork density is calculated to obtain the excavation earthwork volume.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] In a first aspect, the grouting pump, the slurry storage box, and the return slurry barrel are provided, the grouting pump inlet is connected to the slurry storage box and the return slurry barrel respectively, and a first control valve is provided between the grouting pump and the slurry storage box, and a second control valve is provided between the grouting pump and the return slurry barrel. When the slurry storage box is insufficient or the outlet is blocked, causing slurry supply interruption, the slurry storage box outlet can be unblocked by closing the first control valve, while continuing to supply slurry through the return slurry barrel to ensure continuous slurry supply construction;

[0023] Secondly, by setting the flow meter, excavation displacement sensor, PLC module and electric gate valve, when the excavation displacement sensor detects a change in the excavation speed of the excavation device, the PLC module controls the electric gate valve to change the opening and closing degree and thus changes the slurry volume flow rate of the supplied slurry, and monitors the slurry volume flow rate through the flow meter to ensure that the actual slurry supply quality is always equal to the required theoretical slurry supply quality, thereby realizing automatic adjustment of the slurry supply amount and improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0025] Figure 1 This is a schematic diagram of the structure of the double-wheel milling cement soil deep mixing wall slurry supply device provided in this application;

[0026] Figure 2 for Figure 1 The structure of the slurry supply assembly in the double-wheel milling cement soil deep mixing wall slurry supply device shown is an enlarged schematic diagram;

[0027] Figure 3 This is a schematic diagram of the structural connection between the PLC module and the tunneling displacement sensor, flow meter, pressure sensor, grouting pump and electric gate valve in this application;

[0028] Figure 4 A flowchart of the steps of the double-wheel milling cement soil deep mixing wall slurry supply method provided in this application;

[0029] Figure numbers: 101, grouting pump; 102, slurry storage box; 103, slurry return barrel; 104, slurry supply pipe; 105, flow meter; 106, pressure sensor; 107, slurry inlet pipe; 108, slurry return pipe; 109, first control valve; 110, second control valve; 201, excavation device; 202, excavation displacement sensor; 203, slurry nozzle; 301, PLC module; 302, electric gate valve; 303, display / control interface. DETAILED DESCRIPTION

[0030] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0031] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] Example 1

[0033] Please refer to Figure 1-3 , the present application provides a double-wheel milling cement soil deep mixing wall slurry supply device, including a slurry supply component, a tunneling component and a control component;

[0034] The slurry supply assembly includes: a grouting pump 101, a slurry storage box 102, a slurry return barrel 103, a slurry supply pipe 104 and a flow meter 105. The inlet of the grouting pump 101 is communicated with the slurry storage box 102 and the slurry return barrel 103 respectively, and a first control valve 109 is provided between the inlet of the grouting pump 101 and the slurry storage box 102, and a second control valve 110 is provided between the inlet of the grouting pump 101 and the slurry return barrel 103. The outlet of the grouting pump 101 is communicated with the slurry return barrel 103. The flow meter 105 is used to measure the volume flow rate of the slurry in the slurry supply pipe 104;

[0035] The excavation assembly includes: an excavation device 201, an excavation displacement sensor 202 installed on the excavation device 201, and a slurry nozzle 203. The slurry nozzle 203 is connected to the outlet of the grouting pump 101 through the slurry supply pipe 104.

[0036] The control component includes: a PLC module 301 and an electric gate valve 302. The electric gate valve 302 is used to control the connection and disconnection between the outlet of the grouting pump 101 and the slurry bucket 103. The input end of the PLC module 301 is electrically connected to the excavation displacement sensor 202 and the flow meter 105, and the output end is electrically connected to the electric gate valve 302 and the grouting pump 101.

[0037] Specifically, the slurry supply assembly also includes a slurry inlet pipe 107 and a slurry return pipe 108. The inlet of the grouting pump 101 is connected to the slurry storage box 102 and the slurry return barrel 103 through the slurry inlet pipe 107. The slurry inlet pipe 107 includes a first inlet and a second inlet. The first inlet is connected to the outlet of the slurry storage box 102, and the second inlet is connected to the outlet of the slurry return barrel 103. The first control valve 109 is installed at the first inlet for controlling the conduction or blocking of the first inlet. The second control valve 110 is installed at the second inlet for controlling the conduction or blocking of the second inlet, wherein the first control valve 109 and the second control valve 110 are both manual control valves; the outlet of the slurry inlet pipe 107 is connected to the inlet of the grouting pump 101; one end of the slurry return pipe 108 is connected to the slurry supply pipe 104, and the other end is connected to the inlet of the slurry return barrel 103, so that the outlet of the grouting pump 101 is connected to the slurry return barrel 103.

[0038] Specifically, the slurry return barrel 103 uses a large-capacity slurry return barrel 103, so that it can be used to recover the returned slurry on the one hand, and can be used for standby slurry storage on the other hand, so as to ensure continuous slurry supply when the slurry in the slurry storage box 102 is insufficient, avoiding affecting the construction due to insufficient slurry supply.

[0039] Specifically, the electric gate valve 302 is installed on the return slurry pipe 108. Under the condition that the volume flow rate of the slurry provided by the grouting pump 101 after pressurization remains unchanged, the volume flow rate of the returned slurry is changed by controlling the opening and closing degree of the electric gate valve 302, thereby indirectly changing the volume flow rate of the slurry in the slurry supply pipe 104. Compared with the traditional slurry supply device that installs the electric gate valve 302 on the slurry inlet pipeline, it is easier to control the volume flow rate of the slurry in the slurry supply pipe 104 by installing it on the return slurry pipeline.

[0040] Specifically, please refer to the figure. The input end of the PLC module is connected to the flow meter 105, the excavation displacement sensor 202 and the power supply respectively, and the output end is electrically connected to the electric gate valve 302.

[0041] Specifically, in a certain embodiment, the excavation device 201 is a hydraulic milling machine, and the excavation displacement sensor 202 is installed on the hydraulic milling machine. The excavation displacement sensor 202 obtains the displacement of the hydraulic milling machine and obtains the excavation speed of the hydraulic milling machine according to the sinking time; the slurry supply pipe 104 is connected to the slurry nozzle 203, and the flow meter 105 is installed on the slurry supply pipe 104 and is located between the interface between the slurry supply pipe 104 and the slurry return pipe 108 and the slurry nozzle 203. As the excavation device 201 excavates downward, the slurry nozzle 203 continues to spray slurry, and the flow meter 105 monitors the slurry volume flow rate in the slurry supply pipe 104 in real time, thereby obtaining the slurry volume flow rate at the slurry nozzle 203; in actual situations, the excavation speed of the excavation device 201 changes due to changes in stratum strength. Change, at this time the excavation displacement sensor 202 detects and obtains the excavation speed of the hydraulic milling machine at this time to generate a first signal, and sends the first signal to the PLC module 301. After receiving the first signal, the PLC module 301 controls the electric gate valve 302 to change the opening and closing degree, so that the slurry volume flow at the slurry supply pipe 104 changes, until the PLC module 301 receives the second signal from the flow meter 105 and controls the electric gate valve 302 to stop changing. The second signal is the slurry volume flow detected by the flow meter 105, which matches the excavation speed corresponding to the first signal. That is, at the current excavation speed, supplying slurry at this slurry volume flow can ensure that the actual slurry supply quality is equal to the required theoretical slurry supply quality, thereby achieving the purpose of automatically adjusting the slurry volume flow to ensure a uniform slurry incorporation ratio.

[0042] Specifically, under normal circumstances, the first control valve 109 and the second control valve 110 are both controlled to be in the conducting state. At this time, the slurry storage box 102 and the return slurry barrel 103 are both connected to the grouting pump 101, and the grouting pump 101 is supplied with slurry through the slurry storage box 102 and the return slurry barrel 103; when the slurry storage box 102 does not store enough slurry or the outlet is blocked, the worker manually places the first control valve 109 in the blocking state to facilitate the inspection or dredging of the slurry storage box 102, and keeps the second control valve 110 in the conducting state. At this time, the return slurry barrel 103 continues to be connected to the grouting pump 101, and the grouting pump 101 continues to supply slurry through the return slurry barrel 103 in cooperation with the grouting pump 101, effectively preventing the problem of slurry supply suspension caused by insufficient slurry storage box 102 or blockage at the outlet in traditional methods, thereby improving construction efficiency and avoiding affecting construction progress.

[0043] Specifically, the PLC module includes a display / control interface 303 for displaying the measurement results of the flow meter 105 and the excavation displacement sensor 202, and controlling and adjusting parameters in the equipment; the PLC module is also used for.

[0044] Specifically, the flow meter 105 can also be used for inspection work before construction. By opening the first control valve 109 for a period of time, observing whether the value of the flow meter 105 is normal, and then judging whether the slurry storage box is empty, if it is empty, it is necessary to shut down for maintenance.

[0045] Working principle:

[0046] First, by providing the grouting pump 101, the slurry storage box 102, and the slurry return barrel 103, the inlet of the grouting pump 101 is connected to the slurry storage box 102 and the slurry return barrel 103 respectively, and a first control valve 109 is provided between the inlet of the grouting pump 101 and the slurry storage box 102, and a second control valve 110 is provided between the inlet of the grouting pump 101 and the slurry return barrel 103. When the slurry storage box 102 is insufficient or the outlet is blocked, causing the slurry supply to be interrupted, the outlet of the slurry storage box 102 can be dredged by closing the first control valve 109, while continuing to supply slurry through the slurry return barrel 103 to ensure continuous slurry supply construction;

[0047] Secondly, by setting the flow meter 105, the excavation displacement sensor 202, the PLC module 301 and the electric gate valve 302, when the excavation displacement sensor 202 detects that the excavation speed of the excavation device 201 has changed, the PLC module 301 controls the electric gate valve 302 to change the opening and closing degree, thereby changing the slurry volume flow rate of the supplied slurry, and monitors the slurry volume flow rate through the flow meter 105, ensuring that the actual slurry supply quality is always equal to the required theoretical slurry supply quality, realizing automatic adjustment of the slurry supply amount, and improving construction efficiency.

[0048] In a preferred embodiment, the slurry supply assembly also includes a pressure sensor 106, which is installed on the slurry supply pipe 104 and is located between the interface between the slurry supply pipe 104 and the return slurry pipe 108 and the grouting pump 101. The pressure sensor 106 is electrically connected to the input end of the PLC module 301 and is used to measure the pressure in the slurry supply pipe 104 and display it on the display module.

[0049] Specifically, by providing the pressure sensor 106, the pressure in the slurry supply pipe 104 can be monitored to determine whether the pipeline is unobstructed during construction; it can also be used for self-inspection of pipeline unobstructedness before construction begins.

[0050] In a preferred embodiment, the outlet of the grouting pump 101 is connected to the top of the slurry barrel 103 .

[0051] Specifically, the inlet of the slurry barrel 103 is set at the top, the outlet of the grouting pump 101 is connected to one end of the slurry pipe 108, and the other end of the slurry pipe 108 is suspended on the top of the slurry barrel 103 to prevent an interface from being set between the slurry pipe 108 and the slurry barrel 103, thereby avoiding the impact of slurry leakage on construction due to the interface.

[0052] In a preferred embodiment, the grouting pump 101 , the slurry return barrel 103 , the slurry supply pipe 104 and the flow meter 105 are provided in two groups.

[0053] In a certain embodiment, the grouting pump 101 adopts the BW450 model. Only one grouting pump 101 of this model can achieve the purpose of slurry supply. By setting the grouting pump 101, the return slurry barrel 103, the slurry supply pipe 104 and the flow meter 105 into two groups, one group or two groups can be used for slurry supply during the construction process. On the one hand, the slurry supply efficiency can be improved, and on the other hand, the fault tolerance of the device is improved. When one group is used for slurry supply, if a fault occurs at a certain position in this group and the slurry supply stops, the grouting pump 101 in the faulty group can be controlled to stop working and the other group can be started at the same time; when the two groups work at the same time, even if one of the groups is damaged, the other group can continue to supply slurry to ensure that the device will not be completely in a state of stagnation.

[0054] Example 2

[0055] Please refer to Figure 4 The present application provides a double-wheel milling cement soil deep mixing wall slurry supply method, comprising the following steps:

[0056] S1: Divide the excavation depth range to obtain several working depth zones;

[0057] S2: Determine the working depth zone and obtain a first excavation speed in the current working depth zone;

[0058] S3: Obtaining a first area of ​​the hydraulic milling head working surface and a first earthwork density of the current working depth area, and calculating the excavation earthwork mass;

[0059] S4: Obtain the mass of slurry required for unit mass of earthwork and calculate the theoretical slurry supply mass;

[0060] S5: obtaining a first slurry volume flow rate and a first slurry density of the supplied slurry, and calculating an actual slurry supply mass;

[0061] S6: Adjusting the first slurry volume flow rate so that the actual slurry supply mass is equal to the theoretical slurry supply mass.

[0062] In a preferred embodiment, the calculation of the excavation earthwork volume specifically includes:

[0063] The product of the first excavation speed, the first area and the first earthwork density is calculated to obtain the excavation earthwork volume.

[0064] Specifically, in step S1, the excavation depth range of the excavation device 201 is divided into several working depth zones according to the different densities in different depth ranges of the stratum, and the earth density in the same working depth zone is approximately the same.

[0065] Specifically, in step S2 , the depth of the tunneling device 201 is obtained at the control end of the tunneling device 201 , the working depth zone of the tunneling device 201 is determined, and the first tunneling speed of the tunneling device 201 is obtained through the tunneling displacement sensor 202 .

[0066] Specifically, in step S3, the first area is obtained by measuring hydraulic milling working surfaces of different sizes, the first earthwork density is obtained according to actual survey, and the excavation earthwork mass per unit time is calculated according to the first excavation speed, the first area and the first earthwork density.

[0067] Furthermore, the mass of excavated earthwork per unit time is calculated according to formula (1): (one)

[0069] Where, It represents the mass of earthwork excavated per unit time. Indicates the first excavation speed, represents the first area, Indicates the first earthwork density.

[0070] Specifically, in step S4, the mass of slurry required for a unit mass of earthwork is calculated in advance through experiments, the mass of slurry required for a unit mass of earthwork is obtained during construction, and the mass of slurry required for a unit mass of earthwork is multiplied by the mass of the excavated earthwork to calculate the theoretical slurry supply mass.

[0071] Furthermore, the theoretical slurry supply quality is calculated according to formula (2):

[0072] (two)

[0073] Where, Indicates the mass of slurry required for unit mass of earthwork. Indicates the theoretical slurry quality.

[0074] Specifically, in step S5, the first slurry volume flow rate is measured by the flow meter 105, the first slurry density is obtained by the water-cement ratio during slurry mixing, and the actual slurry supply quality is calculated by multiplying the first slurry volume flow rate and the first slurry density.

[0075] Furthermore, the actual slurry quality is calculated according to formula (3):

[0076] (three)

[0077] Where, Indicates the actual slurry quality, represents the first slurry volume flow rate, Indicates the first slurry density.

[0078] Specifically, in step S6, the first slurry volume flow rate is adjusted so that the actual slurry supply mass is equal to the theoretical slurry supply mass, ensuring a uniform slurry mixing ratio in the earthwork to achieve the overall anti-seepage index.

[0079] Furthermore, combining formulas (1), (2), and (3) yields the relationship of formula (4):

[0080] (Four).

[0081] Working process:

[0082] The equation of formula (IV) is written into the PLC module 301 through a program. When constructing in the same working depth zone, the first slurry density is , first area , first earthwork density , the mass of slurry required for unit mass of earthwork are fixed values. Due to the difference in soil hardness, the first excavation speed The PLC module 301 controls the electric gate valve 302 to change the opening and closing degree, and changes the first slurry volume flow rate by controlling the slurry volume flow rate of the return slurry pipe 108. Until the equation relationship of formula (IV) is established, the PLC module 301 controls the electric gate valve 302 to stop changing the opening and closing degree, ensuring that the actual slurry supply quality is equal to the theoretical slurry supply quality, ensuring that the slurry mixing ratio in the wall is uniform to meet the anti-seepage requirements, and realizing automatic adjustment of the actual slurry supply quality;

[0083] When constructing in different working depth zones, the operator manually adjusts the first earthwork density of the different working depth zones. , so that formula (IV) can adapt to different working depth zones, so that when constructing in different working depth zones, the actual slurry supply quality can be automatically adjusted.

[0084] In one embodiment, when two groups of the grouting pumps 101, the slurry return barrels 103, the slurry supply pipes 104 and the flow meter 105 work simultaneously to supply slurry, the slurry volume flow rate measured by the flow meter 105 is , the slurry volume flow rates measured by the two flow meters 105 must be added together through the PLC module 301 to obtain the first slurry volume flow rate, ultimately ensuring that the actual slurry supply quality is equal to the required theoretical slurry supply quality, thereby achieving the purpose of automatically controlling the spraying amount.

[0085] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A double-wheel milling cement soil deep mixing wall slurry supply device, characterized in that: Including slurry supply components, tunneling components and control components; The slurry supply assembly comprises: a grouting pump (101), a slurry storage box (102), a slurry return barrel (103), a slurry supply pipe (104) and a flow meter (105); the inlet of the grouting pump (101) is respectively connected to the slurry storage box (102) and the slurry return barrel (103); a first control valve (109) is provided between the inlet of the grouting pump (101) and the slurry storage box (102); and a second control valve (110) is provided between the inlet of the grouting pump (101) and the slurry return barrel (103); the outlet of the grouting pump (101) is connected to the slurry return barrel (103); the flow meter (105) is used to measure the volume flow rate of the slurry in the slurry supply pipe (104); when the slurry storage box (102) is insufficient or the outlet is blocked, causing the slurry supply to be interrupted, the outlet of the slurry storage box (102) can be cleared by closing the first control valve (109), while the slurry is continuously supplied through the slurry return barrel (103) to ensure continuous slurry supply construction; The excavation assembly comprises: an excavation device (201), an excavation displacement sensor (202) installed on the excavation device (201), and a slurry nozzle (203); the slurry nozzle (203) is connected to the outlet of the grouting pump (101) through the slurry supply pipe (104); The control component comprises: a PLC module (301) and an electric gate valve (302), wherein the electric gate valve (302) is used to control the on / off between the outlet of the grouting pump (101) and the slurry return barrel (103), an input end of the PLC module (301) is electrically connected to the excavation displacement sensor (202) and the flow meter (105), and an output end is electrically connected to the electric gate valve (302) and the grouting pump (101); when the excavation displacement sensor (202) detects a change in the excavation speed of the excavation device (201), the PLC module (301) controls the electric gate valve (302) to change the opening and closing degree, thereby changing the slurry volume flow rate of the supplied slurry, and monitors the slurry volume flow rate through the flow meter (105), thereby ensuring that the actual slurry supply quality is always equal to the required theoretical slurry supply quality, realizing automatic adjustment of the slurry supply amount, and improving construction efficiency.

2. The double-wheel milling cement soil deep mixing wall slurry supply device according to claim 1 is characterized in that: The slurry supply assembly further comprises a pressure sensor (106), which is mounted on the slurry supply pipe (104) and electrically connected to the input end of the PLC module (301) for measuring the pressure in the slurry supply pipe (104).

3. The double-wheel milling cement soil deep mixing wall slurry supply device according to claim 1 is characterized in that: The outlet of the grouting pump (101) is connected to the top of the slurry return barrel (103).

4. The double-wheel milling cement soil deep mixing wall slurry supply device according to claim 1 is characterized in that: The grouting pump (101), the slurry return barrel (103), the slurry supply pipe (104) and the flow meter (105) are provided in two groups.

5. A double-wheel milling cement soil deep mixing wall slurry supply method, using the double-wheel milling cement soil deep mixing wall slurry supply device according to any one of claims 1 to 4, characterized in that: The following steps are involved: Divide the excavation depth range to obtain several working depth zones; Determine the working depth zone, and obtain a first excavation speed in the current working depth zone; Obtain the first area of ​​the hydraulic milling head working surface and the first earthwork density of the current working depth area to calculate the excavation earthwork mass; Obtain the mass of slurry required for unit mass of earthwork and calculate the theoretical slurry supply mass; Obtaining a first slurry volume flow rate and a first slurry density of the supplied slurry, and calculating an actual slurry supply mass; The first slurry volume flow rate is adjusted so that the actual slurry supply mass is equal to the theoretical slurry supply mass.

6. The double-wheel milling cement soil deep mixing wall slurry supply method according to claim 5 is characterized in that: The calculation of the excavation earthwork mass specifically includes: The product of the first excavation speed, the first area and the first earthwork density is calculated to obtain the excavation earthwork volume.

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