CN115928828A - Double-wheel cement-soil-milling deep-stirring wall slurry supply device and method - Google Patents

Abstract

The application provides a two-wheel mills soil cement stirs wall confession thick liquid device and method deeply, wherein, two-wheel mills soil cement stirs wall confession thick liquid device deeply and includes: the grouting pump inlet is respectively communicated with the grout storage tank, a first control valve is arranged between the grouting pump inlet and the grout storage tank, a second control valve is arranged between the grouting pump inlet and the grout return barrel, and the grouting pump outlet is communicated with the grout return barrel; the tunneling assembly comprises a tunneling device, a tunneling displacement sensor and a slurry nozzle, and the slurry nozzle is communicated with the outlet of the grouting pump through a slurry supply pipe; and the control assembly comprises a PLC module and an electric gate valve, the input end of the PLC module is electrically connected with the tunneling displacement sensor and the flow meter, and the output end of the PLC module is electrically connected with the electric gate valve and the grouting pump. The application provides a two rounds of mills soil cement and stirs wall confession thick liquid device deeply has the automatic regulation and control and spouts the thick liquid volume size, prevents to cause the confession thick liquid to break eventually in order to ensure the advantage of supplying thick liquid in succession because of storage thick liquid of thick liquid case is not enough or the export blocks up.

Description

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

Technical Field

The disclosure relates to the technical field of hydroelectric construction, in particular to a device and a method for double-wheel milling cement soil deep mixing wall slurry supply.

Background

A double-wheel milling deep stirring construction method (CSM for short) is a non-soil-taking stirring wall forming device, namely a double-wheel milling head is used for milling soil to advance, a pump is used for conveying high-pressure cement slurry and air to the milling head through a guide rod while hydraulic milling is carried out on broken soil, and the high-pressure cement slurry and the air are fully stirred with an excavated original state substance, so that a diaphragm wall and a retaining wall are formed or a stratum is improved, and the method is a novel technology for efficient construction.

Aiming at the construction of a double-wheel milling cement-soil stirring impervious wall, many cases exist at home and abroad currently, but the construction process is not sound, a processing method aiming at special strata is lacked, particularly aiming at geological conditions with large stratum density change, large strength change and extremely high strength, the frequency of change of the sedimentation speed of a milling head is very large when the double-wheel milling is carried out, the cement incorporation ratio in the wall is ensured to be uniform so as to achieve the integral impervious index, the slurry spraying amount of the milling head is changed along with the change of the cement mixing ratio, and the high-frequency change of the instant slurry spraying amount of the milling head is caused by double change influence factors of stratum density classification and strength change in each type of strata. In addition, the conventional construction slurry supply station always causes the final break of slurry supply due to insufficient slurry storage amount or clogging of the outlet of the slurry storage tank, so that the double-wheel milling slurry spraying construction is forced to be finally broken. Influence the construction progress and the quality of the deep stirring wall body.

Disclosure of Invention

In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a device and a method for double-wheel milling cement soil deep mixing wall grout supply to solve the above-mentioned problems.

The application provides a double-wheel cement-soil milling deep-mixing wall slurry supply device which comprises a slurry supply assembly, a tunneling assembly and a control assembly;

the slurry supply assembly comprises: the grouting pump comprises a grouting pump, a grout storage tank, a grout return barrel, a grout supply pipe and a flowmeter, wherein an inlet of the grouting pump is respectively communicated with the grout storage tank and the grout return barrel, a first control valve is arranged between the grouting pump and the grout storage tank, a second control valve is arranged between the grouting pump and the grout return barrel, an outlet of the grouting pump is communicated with the grout return barrel, and the flowmeter is used for measuring the volume flow of grout in the grout supply pipe;

the tunneling assembly comprises: the slurry injection pump comprises a tunneling device, a tunneling displacement sensor and a slurry nozzle, wherein the tunneling displacement sensor and the slurry nozzle are arranged on the tunneling device;

the control assembly includes: PLC module and electric gate valve, electric gate valve is used for control the grouting pump export with break-make between the mud return barrel, the input of PLC module with tunnelling displacement sensor, flowmeter electricity are connected, the output with electric gate valve and grouting pump electricity are connected.

According to the technical scheme that this application embodiment provided, supply thick liquid subassembly still includes pressure sensor, pressure sensor installs supply thick liquid pipe go up and with the input electricity of PLC module is connected, is used for measuring supply the intraductal pressure of thick liquid.

According to the technical scheme provided by the embodiment of the application, the outlet of the grouting pump is communicated to the top of the slurry return barrel.

According to the technical scheme that this application embodiment provided, grouting pump, back thick liquid bucket, confession thick liquid pipe and flowmeter are equipped with two sets ofly.

The application provides in a second aspect a method for supplying cement soil deep mixing wall slurry by double milling, comprising the following steps:

dividing a tunneling depth range to obtain a plurality of working depth areas;

determining the working depth area, and acquiring a first tunneling speed under the current working depth area;

acquiring a first area of a working surface of a hydraulic milling head and a first earthwork density of a current working depth area, and calculating the mass of the excavated earthwork;

obtaining the mass of the slurry required to be supplied by earthwork with unit mass, and calculating the theoretical slurry supply mass;

acquiring a first slurry volume flow and a first slurry density of supplied slurry, and calculating actual slurry supply mass;

adjusting the first slurry volumetric flow rate so that the actual slurry supply mass is equal to the theoretical slurry supply mass.

According to the technical scheme provided by the embodiment of the application, the calculating the tunneling earth volume specifically comprises the following steps:

and calculating the product of the first tunneling speed, the first area and the first earthwork density to obtain the tunneling earthwork amount.

Compared with the prior art, the beneficial effect of this application lies in:

on the first hand, the grouting pump, the grout storage box and the grout returning barrel are arranged, the inlet of the grouting pump is respectively communicated with the grout storage box and the grout returning barrel, a first control valve is arranged between the inlet of the grouting pump and the grout storage box, and a second control valve is arranged between the inlet of the grouting pump and the grout returning barrel;

in the second aspect, by arranging the flowmeter, the tunneling displacement sensor, the PLC module and the electric gate valve, when the tunneling displacement sensor detects that the tunneling speed of the tunneling device changes, the PLC module controls the electric gate valve to change the opening and closing degree and further change the volume flow of the slurry supplied to the slurry, and monitors the volume flow of the slurry through the flowmeter, so that the actual slurry supply quality is always equal to the required theoretical slurry supply quality, the automatic adjustment of the slurry supply amount is realized, and the construction efficiency is improved.

Drawings

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

FIG. 1 is a schematic structural diagram of a double-wheel cement soil deep mixing wall slurry supply device for milling provided by the present application;

FIG. 2 is an enlarged schematic view of a slurry supply assembly of the double-wheel cement-milling soil deep-stirring wall slurry supply apparatus shown in FIG. 1;

FIG. 3 is a schematic view of structural connection between a PLC module and a tunneling displacement sensor, a flowmeter, a pressure sensor, a grouting pump and an electric gate valve in the application;

FIG. 4 is a flowchart illustrating the steps of a method for double-milling soil cement deep-mixing wall grout supply provided by the present application;

reference numerals: 101. grouting pump; 102. a slurry storage tank; 103. a pulp returning barrel; 104. a slurry supply pipe; 105. a flow meter; 106. a pressure sensor; 107. a pulp inlet pipe; 108. a slurry return pipe; 109. a first control valve; 110. a second control valve; 201. a tunneling device; 202. a tunneling displacement sensor; 203. a slurry nozzle; 301. a PLC module; 302. an electrically operated valve; 303. a display/control interface.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example 1

Referring to fig. 1-3, the present application provides a double-wheel cement soil milling deep mixing wall slurry supply device, which includes a slurry supply assembly, a tunneling assembly and a control assembly;

the slurry supply assembly comprises: the grouting pump comprises a grouting pump 101, a slurry storage tank 102, a slurry return barrel 103, a slurry supply pipe 104 and a flow meter 105, wherein the inlet of the grouting pump 101 is respectively communicated with the slurry storage tank 102 and the slurry return barrel 103, a first control valve 109 is arranged between the grouting pump 101 and the slurry storage tank 102, a second control valve 110 is arranged between 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, and the flow meter 105 is used for measuring the volume flow of slurry in the slurry supply pipe 104;

the tunneling assembly comprises: the slurry injection device comprises a tunneling device 201, a tunneling displacement sensor 202 and a slurry nozzle 203, wherein the tunneling displacement sensor 202 and the slurry nozzle 203 are installed on the tunneling device 201, and the slurry nozzle 203 is communicated with the outlet of the slurry injection pump 101 through a slurry supply pipe 104;

the control assembly includes: PLC module 301 and electric gate valve 302, electric gate valve 302 is used for control slip casting pump 101 export with break-make between the slip casting bucket 103, PLC module 301's input with tunnelling displacement sensor 202, flowmeter 105 electricity are connected, the output with electric gate valve 302 and slip casting pump 101 electricity are connected.

Specifically, the slurry supply assembly further comprises a slurry inlet pipe 107 and a slurry return pipe 108, an inlet of the grouting pump 101 is communicated with the slurry storage tank 102 and the slurry return barrel 103 through the slurry inlet pipe 107, the slurry inlet pipe 107 comprises a first inlet and a second inlet, the first inlet is communicated with an outlet of the slurry storage tank 102, the second inlet is communicated with an outlet of the slurry return barrel 103, the first control valve 109 is installed at the first inlet and used for controlling the connection or disconnection of the first inlet, the second control valve 110 is installed at the second inlet and used for controlling the connection or disconnection 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 communicated with the inlet of the grouting pump 101; one end of the slurry return pipe 108 is communicated with the slurry supply pipe 104, and the other end is communicated with the inlet of the slurry return barrel 103, so that the outlet of the grouting pump 101 is communicated with the slurry return barrel 103.

Specifically, the large-capacity slurry return barrel 103 is selected as the slurry return barrel 103, so that the slurry return barrel can be used for recovering the returned slurry on one hand, and the slurry storage barrel can be used for standby slurry storage on the other hand, so that continuous slurry supply can be ensured when the slurry in the slurry storage tank 102 is insufficient, and influence on construction caused by insufficient slurry supply is avoided.

Specifically, electric gate valve 302 is installed on the mud return pipe 108, under the unchangeable condition of the thick liquid volumetric flow that provides after the pressurization of grouting pump 101, change through control electric gate valve 302's the degree of opening and shutting changes the thick liquid volumetric flow of backward flow, indirectly changes supply thick liquid volumetric flow in the thick liquid pipe 104, compare in traditional confession thick liquid device will electric gate valve 302 is installed advance on the thick liquid pipeline, install on the mud return pipe more easily right supply thick liquid volumetric flow in the thick liquid pipe 104 to control.

Specifically, referring to the figure, the input end of the PLC module is respectively connected to the flowmeter 105, the tunneling displacement sensor 202, and the power supply, and the output end is electrically connected to the electric gate valve 302.

Specifically, in a certain embodiment, the tunneling device 201 is a hydraulic mill, the tunneling displacement sensor 202 is mounted on the hydraulic mill, and the tunneling displacement sensor 202 obtains the displacement of the hydraulic mill and obtains the tunneling speed of the hydraulic mill according to the sinking time; the slurry supply pipe 104 is communicated with the slurry nozzle 203, the flowmeter 105 is mounted on the slurry supply pipe 104 and is positioned between the slurry nozzle 203 and the interface of the slurry supply pipe 104 and the slurry return pipe 108, as the tunneling device 201 tunnels downwards, the slurry nozzle 203 continuously conducts slurry spraying, and the flowmeter 105 monitors the volume flow of the slurry in the slurry supply pipe 104 in real time, so as to obtain the volume flow of the slurry at the slurry nozzle 203; in an actual situation, the tunneling speed of the tunneling device 201 changes due to a change in the formation strength, at this time, the tunneling displacement sensor 202 detects and obtains the tunneling speed of the hydraulic mill 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 volume flow rate of the slurry at the slurry supply pipe 104 changes, until the PLC module 301 receives a second signal sent by the flow meter 105, the electric gate valve 302 is controlled to stop changing, and the second signal is that the volume flow rate of the slurry detected by the flow meter 105 matches the tunneling speed corresponding to the first signal, that is, at the current tunneling speed, slurry supply is performed with the volume flow rate of the slurry, so that the actual slurry supply quality can be guaranteed to be equal to the required theoretical slurry supply quality, and the purpose of automatically adjusting the volume flow rate to guarantee the uniform slurry mixing ratio is achieved.

Specifically, under normal conditions, the first control valve 109 and the second control valve 110 are both controlled to be in a conduction state, at this time, both the slurry storage tank 102 and the slurry return barrel 103 are conducted with the grouting pump 101, and the grouting pump 101 is supplied with slurry through both the slurry storage tank 102 and the slurry return barrel 103; when the slurry storage tank 102 is insufficient in slurry storage or the outlet is blocked, a worker manually puts the first control valve 109 into a blocking state to facilitate checking or dredging the slurry supply tank 102, keeps the second control valve 110 in a conducting state, and then the slurry return barrel 103 is continuously conducted with the grouting pump 101, and the slurry return barrel 103 is matched with the grouting pump 101 to continuously supply slurry, so that the problem of slurry supply stop caused by insufficient slurry storage of the slurry supply tank 102 or blocking of the outlet in the traditional method is effectively prevented, the construction efficiency is improved, and the construction progress is prevented from being influenced.

Specifically, the PLC module includes a display/control interface 303 configured to display measurement results of the flowmeter 105 and the tunneling displacement sensor 202, and control parameters in the adjustment device; the PLC module is also used for.

Specifically, the flow meter 105 can also be used for inspection before construction, and the first control valve 109 is opened for a period of time to observe whether the value of the flow meter 105 is normal, so as to judge whether the slurry storage tank is empty, and if the slurry storage tank is empty, the slurry storage tank needs to be shut down for maintenance.

The working principle is as follows:

on the first hand, by arranging the grouting pump 101, the slurry storage tank 102 and the slurry return barrel 103, the inlet of the grouting pump 101 is respectively communicated with the slurry storage tank 102 and the slurry return barrel 103, a first control valve 109 is arranged between the grouting pump 101 and the slurry storage tank 102, and a second control valve 110 is arranged between the grouting pump 101 and the slurry return barrel 103, when slurry supply is interrupted due to insufficient slurry storage or slurry storage in the slurry storage tank 102 or slurry supply at the outlet is blocked, the outlet of the slurry storage tank 102 can be dredged by closing the first control valve 109, and continuous slurry supply construction can be ensured by continuing slurry supply through the slurry return barrel 102;

in the second aspect, by arranging the flow meter 105, the tunneling displacement sensor 202, the PLC module 301 and the electric gate valve 302, when the tunneling displacement sensor 202 detects that the tunneling speed of the tunneling device 201 changes, the PLC module 301 controls the electric gate valve 302 to change the opening and closing degree and further change the volume flow of the supplied slurry, and monitors the volume flow of the slurry through the flow meter 105, so that the actual slurry supply quality is always equal to the required theoretical slurry supply quality, the automatic adjustment of the slurry supply amount is realized, and the construction efficiency is improved.

In a preferred embodiment, the slurry supply assembly further comprises a pressure sensor 106, the pressure sensor 106 is installed on the slurry supply pipe 104 and located between the interface of the slurry supply pipe 104 and the slurry return pipe 108 and the slurry supply pump 101, and the pressure sensor 106 is electrically connected with the input end of the PLC module 301 and is used for measuring the pressure in the slurry supply pipe 104 and displaying the pressure on the display module.

Specifically, the pressure sensor 106 is arranged, so that the pressure in the slurry supply pipe 104 can be monitored, and whether the pipeline is smooth or not during construction is judged; the method can also be used for self-checking of pipeline smoothness before construction begins.

In a preferred embodiment, the outlet of the grouting pump 101 is communicated to the top of the slurry return barrel 103.

Specifically, the setting of backrush bucket 103 entry is at the top, grouting pump 101 export with backrush pipe 108 one end intercommunication, the other end suspension of backrush pipe 108 with backrush bucket 103 top prevents backrush pipe 108 with set up the interface between the backrush bucket 103, avoid because the interface leaks to starch and causes the influence to the construction.

In a preferred embodiment, two sets of the grouting pump 101, the return barrel 103, the slurry supply pipe 104 and the flow meter 105 are provided.

In one embodiment, the grouting pump 101 is of BW450 type, the grouting pump 101 of this type can achieve the purpose of slurry supply by only using one grouting pump 101, and the grouting barrel 103, the slurry supply pipe 104 and the flow meter 105 are set into two groups, so that one group can be used for slurry supply in the construction process, and two groups can be used for slurry supply, on one hand, the slurry supply efficiency can be improved, and on the other hand, the fault tolerance of the device can be improved; when two groups work simultaneously, even if one group is damaged, the other group can be used for continuously supplying slurry, so that the device cannot be completely in a state of stagnation work.

Example 2

Referring to fig. 4, the present application provides a method for milling cement soil deeply mixed wall slurry by two wheels, comprising the following steps:

s1: dividing a tunneling depth range to obtain a plurality of working depth zones;

s2: determining the working depth area, and acquiring a first tunneling speed in the current working depth area;

s3: acquiring a first area of a working surface of the hydraulic milling head and a first earthwork density of a current working depth area, and calculating the mass of the excavated earthwork;

s4: obtaining the mass of the slurry required to be supplied to earthwork of unit mass, and calculating the theoretical slurry supply mass;

s5: acquiring a first slurry volume flow and a first slurry density of supplied slurry, and calculating actual slurry supply mass;

s6: adjusting the first slurry volumetric flow rate such that the actual slurry feed mass equals the theoretical slurry feed mass.

In a preferred embodiment, the calculating the heading earth volume specifically includes:

and calculating the product of the first tunneling speed, the first area and the first earthwork density to obtain the tunneling earthwork amount.

Specifically, in step S1, the tunneling depth range of the tunneling device 201 is divided according to the different densities in different depth ranges of the stratum, and a plurality of working depth zones are divided, and the earthwork densities in the same working depth zone are approximately the same.

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 where the tunneling device 201 is located is determined, and the first tunneling speed of the tunneling device 201 is obtained through the tunneling displacement sensor 202.

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

Further, the mass of the excavated earth in unit time is calculated according to the formula (I):

in the formula, M _t The mass of the excavated earth in unit time is expressed,

denotes the first tunneling speed, S denotes the first area, p _t Representing a first earth density.

Specifically, in step S4, the mass of the slurry required to be supplied per unit mass of earthwork is calculated in advance through a test, the mass of the slurry required to be supplied per unit mass of earthwork is obtained during construction, and the mass of the slurry required to be supplied per unit mass of earthwork and the mass of the excavated earthwork are multiplied by each other to calculate the theoretical slurry supply mass.

Further, the theoretical pulp supply quality is calculated and expressed according to the formula (II):

M _h ＝N·M _t (II)

Wherein N represents the mass of slurry to be supplied per unit mass of earthwork, and M _h Representing the theoretical pulp quality.

Specifically, in step S5, the flowmeter 105 measures and obtains the first slurry volume flow rate, the first slurry density is obtained by the water-cement ratio during slurry proportioning, and the actual slurry supply quality is calculated and obtained by multiplying the first slurry volume flow rate and the first slurry density.

Further, calculating the actual pulp supply quality is expressed according to the formula (III):

in the formula, M _s The actual pulp supply quality is shown,

represents the first slurry volume flow rate, p _c Representing the first slurry density.

Specifically, in step S6, the volume flow rate of the first slurry is adjusted to make the actual slurry supply quality equal to the theoretical slurry supply quality, so as to ensure that the slurry doping ratio in the earthwork is uniform, and thus the integral anti-seepage index is achieved.

Further, combining the formulas (one), (two), (three) can obtain the relationship of the formula (four):

the working process comprises the following steps:

the equation relation of the formula (IV) is written into the PLC module 301 through a program, and when construction is carried out in the same working depth area, the first slurry density rho _c A first area S, a first earth density rho _t The mass N of the slurry required to be supplied per unit mass of earthwork is a fixed value, and the first tunneling speed is caused by the difference in hardness of the earthwork

Will change, at this moment, the equality relation of the formula (four) does not hold, the PLC module 301 controls the electric gate valve 302 to change the opening and closing degree, and changes the first pulp volume flow ≥ by controlling the pulp volume flow rate refluxed in the pulp returning pipe 108>

Until the equality relation of the formula (IV) is established, the PLC module 301 controls the electric gate valve 302 to stop changing the opening and closing degree, so that the actual slurry supply quality is equal to the theoretical slurry supply quality, the uniform doping ratio of the slurry in the wall is ensured to meet the anti-seepage requirement, and the automatic adjustment of the actual slurry supply quality is realized;

when the construction is carried out under different working depth zones, an operator manually adjusts the winning first earthwork density rho of the different working depth zones _t And the formula (IV) can adapt to different working depth areas, so that the actual pulp supply quality can be automatically adjusted during construction in different working depth areas.

In one embodiment, when two sets of the grouting pump 101, the slurry return barrel 103, the slurry supply pipe 104 and the flow meter 105 are simultaneously operated to supply slurry, the volumetric flow rate of the slurry measured by the flow meter 105 is

The PLC module 301 is required to add the volume flows of the slurries measured by the two flow meters 105 to obtain the first volume flow of the slurry, so as to finally ensure that the actual slurry supply quality is equal to the required theoretical slurry supply quality, thereby achieving the purpose of automatically regulating and controlling the slurry spraying amount.

The foregoing description is only exemplary of the preferred embodiments of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (6)

1. A double-wheel cement soil milling deep-mixing wall slurry supply device is characterized by comprising a slurry supply assembly, a tunneling assembly and a control assembly;

the slurry supply assembly comprises: the grouting pump comprises a grouting pump (101), a grouting tank (102), a grout returning barrel (103), a grout supplying pipe (104) and a flowmeter (105), wherein an inlet of the grouting pump (101) is communicated with the grouting tank (102) and the grout returning barrel (103) respectively, a first control valve (109) is arranged between the grouting tank (102), a second control valve (110) is arranged between the grouting tank (103), an outlet of the grouting pump (101) is communicated with the grout returning barrel (103), and the flowmeter (105) is used for measuring the volume flow of grout in the grout supplying pipe (104);

the tunneling assembly comprises: the slurry injection device comprises a tunneling device (201), a tunneling displacement sensor (202) and a slurry nozzle (203), wherein the tunneling displacement sensor (202) and the slurry nozzle (203) are installed on the tunneling device (201), and the slurry nozzle (203) is communicated with the outlet of the slurry injection pump (101) through a slurry supply pipe (104);

the control assembly includes: PLC module (301) and electric gate valve (302), electric gate valve (302) are used for control grouting pump (101) export with break-make between grout returning bucket (103), the input of PLC module (301) with tunnelling displacement sensor (202), flowmeter (105) electricity are connected, the output with electric gate valve (302) and grouting pump (101) electricity are connected.

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

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

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

5. A cement soil deep-stirring wall slurry supply method for double-wheel milling is characterized by comprising the following steps:

dividing a tunneling depth range to obtain a plurality of working depth zones;

determining the working depth area, and acquiring a first tunneling speed under the current working depth area;

acquiring a first area of a working surface of a hydraulic milling head and a first earthwork density of a current working depth area, and calculating the mass of the excavated earthwork;

obtaining the mass of the slurry required to be supplied to earthwork of unit mass, and calculating the theoretical slurry supply mass;

acquiring a first slurry volume flow and a first slurry density of supplied slurry, and calculating actual slurry supply mass;

adjusting the first slurry volumetric flow rate so that the actual slurry supply mass is equal to the theoretical slurry supply mass.

6. The double-wheel cement soil deep mixing wall slurry supply method for milling according to claim 5, wherein the calculating of the tunneling earth volume specifically comprises:

and calculating the product of the first tunneling speed, the first area and the first earthwork density to obtain the tunneling earthwork amount.

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