Shield tail sealing control system and method

Abstract

The application discloses a shield tail sealing control system and method, wherein the system comprises a shield tail grease cavity state monitoring subsystem, a segment outside grouting state monitoring subsystem, a tail brush wear monitoring subsystem, a shield tail gap measuring subsystem and a shield tail sealing grease injection intelligent control subsystem; the shield tail grease cavity state monitoring subsystem is used for monitoring the state values of each point in the shield tail grease cavity in real time; the segment outside grouting state monitoring subsystem is used for monitoring the state values of segment outside grouting in real time; the tail brush wear monitoring subsystem is used for monitoring the wear amount of the front guard plate of the shield tail brush in real time; the shield tail gap measuring subsystem is used for measuring the gap values between the shield tail and the segment in real time; and the shield tail sealing grease injection intelligent control subsystem is used for determining the grease injection demand and controlling the opening and closing of the grease injection channel according to the grease injection demand. The application can master the state of shield tail sealing in real time, realize the control of shield tail sealing grease injection and save the cost of shield tail sealing grease injection.

Description

Technical Field

[0001] This invention relates to the field of advanced geological prediction technology for tunnel boring machines, and particularly to a shield tail sealing control system and method for shield tunneling machines. Background Technology

[0002] This section is intended to provide background or context for the embodiments of the invention set forth in the claims. The description herein is not an admission that it is prior art simply because it is included in this section.

[0003] The tail seal system plays a crucial role in the operation of a tunnel boring machine (TBM). Improper operation can lead to serious safety accidents. Currently, the grease injection method for the tail seal system is an open-loop control method. As TBM construction develops towards larger diameters, longer distances, and higher water pressures, the requirements for the tail seal system are becoming increasingly stringent, making precise control of the grease injection method particularly important. Because the state inside the tail brush cavity is unknown and there is no effective monitoring method, the grease injection amount is indirectly determined by increasing personnel to observe whether the tail seal is leaking and by monitoring construction parameters, which does not achieve precise grease injection and closed-loop control. Summary of the Invention

[0004] This invention provides a shield tail seal control system for tunnel boring machines, which enables precise grease injection into the shield tail seal and saves on the cost of shield tail seal grease injection. The system includes:

[0005] The system includes: shield tail grease chamber status monitoring subsystem, segment outer grouting status monitoring subsystem, tail brush wear monitoring subsystem, shield tail gap measurement subsystem, and shield tail sealing grease injection intelligent control subsystem.

[0006] The shield tail grease chamber status monitoring subsystem is used to: monitor the status values ​​of each point in the shield tail grease chamber in real time;

[0007] The segment external grouting status monitoring subsystem is used to: monitor the status values ​​of the segment external grouting in real time;

[0008] The tail brush wear monitoring subsystem is used to: monitor the wear amount of the front guard plate of the shield tail brush in real time;

[0009] The shield tail gap measurement subsystem is used to: measure the gap between the shield tail and the tunnel lining segments in real time;

[0010] The intelligent control subsystem for shield tail sealing grease injection is used to: determine the grease injection requirements based on the status values ​​of each point in the shield tail grease chamber and the corresponding judgment conditions, the status values ​​of the grouting outside the tunnel segment and the corresponding judgment conditions, the wear amount of the shield tail brush front guard plate and the corresponding judgment conditions, and the gap value between the shield tail and the tunnel segment and the corresponding judgment conditions; and control the opening and closing of the grease injection channel according to the grease injection requirements.

[0011] This invention also provides a method for controlling the tail seal of a tunnel boring machine, to achieve precise grease injection into the tail seal and save on the cost of tail seal grease injection. The method includes:

[0012] The status values ​​of each point in the shield tail grease chamber are monitored in real time using the shield tail grease chamber status monitoring subsystem.

[0013] The status values ​​of grouting on the outside of the tunnel segments are monitored in real time using the grouting status monitoring subsystem on the outside of the tunnel segments.

[0014] The wear of the shield tail brush front guard plate is monitored in real time using the tail brush wear monitoring subsystem;

[0015] The shield tail gap measurement subsystem is used to measure the gap between the shield tail and the tunnel lining segments in real time.

[0016] The intelligent control subsystem for grease injection at the tail shield is used to determine the grease injection requirements based on the status values ​​and corresponding judgment conditions of each point in the grease chamber at the tail shield, the status values ​​and corresponding judgment conditions of the grouting outside the tunnel segment, the wear amount and corresponding judgment conditions of the front guard plate at the tail shield, and the gap value and corresponding judgment conditions between the tail shield and the tunnel segment. Based on the grease injection requirements, the opening and closing of the grease injection channel is controlled.

[0017] This invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described shield tail sealing control method for tunnel boring machines.

[0018] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described shield tail sealing control method for tunnel boring machines.

[0019] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described shield tail sealing control method for tunnel boring machines.

[0020] In this embodiment of the invention, an intelligent diagnostic subsystem is used to determine grease injection requirements based on the status values ​​and corresponding judgment conditions of various points within the shield tail grease chamber, the status values ​​and corresponding judgment conditions of grouting outside the tunnel segments, the wear amount and corresponding judgment conditions of the shield tail brush front guard plate, and the gap value and corresponding judgment conditions between the shield tail and the tunnel segments. Based on the judgment results, the opening and closing of the grease injection channels are controlled, and grease is injected into the shield tail sealing system. Through precise measurement of front-end sensing data from each subsystem, the status of the shield tail seal can be monitored in real time, enabling control of shield tail seal grease injection and saving on shield tail seal grease injection costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0022] Figure 1 This is a schematic diagram of the shield tail sealing control system of a tunnel boring machine in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of a specific shield tail sealing control system of a tunnel boring machine in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the shield tail sealing control system of a tunnel boring machine in a second specific embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the shield tail sealing control system of a tunnel boring machine in the third specific embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the shield tail sealing control system of a tunnel boring machine in an embodiment of the present invention;

[0027] Figure 6 This is a flowchart of the shield tail sealing control method in an embodiment of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0029] Figure 1 This is a schematic diagram of the shield tail sealing control system of a tunnel boring machine according to an embodiment of the present invention. The system includes:

[0030] The shield tail grease chamber status monitoring subsystem 101, the grouting status monitoring subsystem on the outside of the segments 102, the tail brush wear monitoring subsystem 103, the shield tail gap measurement subsystem 104, and the shield tail sealing grease injection intelligent control subsystem 105;

[0031] The shield tail grease chamber status monitoring subsystem 101 is used to: monitor the status values ​​of each point in the shield tail grease chamber in real time;

[0032] The segment outer grouting status monitoring subsystem 102 is used to: monitor the status value of the segment outer grouting in real time;

[0033] The tail brush wear monitoring subsystem 103 is used to: monitor the wear amount of the front guard plate of the shield tail brush in real time;

[0034] The shield tail gap measurement subsystem 104 is used to: measure the gap value between the shield tail and the tunnel lining segments in real time;

[0035] The intelligent control subsystem 105 for sealing grease injection at the tail shield is used to: determine the grease injection requirements based on the status values ​​of each point in the grease chamber at the tail shield and the corresponding judgment conditions, the status values ​​of the grouting outside the segment and the corresponding judgment conditions, the wear amount of the front guard plate of the tail shield and the corresponding judgment conditions, and the gap value between the tail shield and the segment and the corresponding judgment conditions; and control the opening and closing of the grease injection channel according to the grease injection requirements.

[0036] In one embodiment, the state values ​​of each point within the shield tail grease chamber include pressure, temperature, and water content;

[0037] The grouting status values ​​on the outside of the tunnel lining segments include pressure and temperature values.

[0038] In a specific embodiment, the shield tail grease chamber status monitoring subsystem 101 has several sensor modules installed inside the shield tail grease chamber, which can monitor the pressure, temperature and water content at various points in the shield tail grease chamber in real time; the segment outer grouting status monitoring subsystem 102 has several sensors installed at the rear of the tail shield, which can monitor the grouting pressure and temperature on the outside of the segment in real time; the tail brush wear monitoring subsystem 103 has several sensors installed on the front guard plate of the tail brush, which can monitor the wear of the front guard plate of the shield tail brush in real time; the shield tail gap measurement subsystem 104 has several sensors installed on the inner wall of the tail shield, which can measure the gap value between the tail shield and the segment in real time; and the shield tail sealing grease injection intelligent control subsystem 105 can perform closed-loop control and precise grease injection based on the data collected by each subsystem.

[0039] like Figure 2 The diagram shown is a schematic diagram of a specific shield tail sealing control system in an embodiment of the present invention. In one embodiment, the intelligent control subsystem for shield tail sealing grease injection includes: a data acquisition module 201.

[0040] The data acquisition module 201 is used to: preprocess the received status values ​​of each point in the shield tail grease chamber, the status values ​​of grouting on the outside of the segment, the wear amount of the shield tail brush front guard plate, and the gap value between the shield tail and the segment, and convert them into data formed by general signals.

[0041] like Figure 3 The diagram shown is a schematic diagram of a specific shield tail sealing control system in an embodiment of the present invention. In one embodiment, the intelligent control subsystem for shield tail sealing grease injection includes: a PLC module 301 and an intelligent diagnostic module 302.

[0042] PLC module 301 is used for:

[0043] It receives data from the data acquisition module and transmits it to the intelligent diagnostic module;

[0044] The system receives grease injection requests from the intelligent diagnostic module and controls the opening and closing of the grease injection channels based on these requests.

[0045] The intelligent diagnostic module 302 is used for:

[0046] The data received from the PLC module is input into the intelligent diagnostic algorithm. The intelligent diagnostic algorithm determines the grease injection requirements based on the status values ​​of each point in the shield tail grease chamber and the corresponding judgment conditions, the status values ​​of the grouting on the outside of the tunnel segment and the corresponding judgment conditions, the wear amount of the shield tail brush front guard plate and the corresponding judgment conditions, and the gap value between the shield tail and the tunnel segment and the corresponding judgment conditions, and then transmits the grease injection requirements to the PLC module.

[0047] In a specific embodiment, the data acquisition module 201 can preprocess the data collected by each subsystem, convert it into a common format, and transmit it to the PLC 203 of the PLC module 301. The PLC 203 of the PLC module 301 then uploads the common format data to the intelligent diagnostic module 302. In a specific embodiment, the intelligent diagnostic module performs the following processing:

[0048] (1) Display all front-end sensing information to the host computer to meet the two control modes of the shield tail sealing grease injection system: pressure and quantity.

[0049] (2) Compare the pressure values ​​P1 in the front cavity, P2 in the middle cavity, P3 in the rear cavity, and P4 in the grouting pressure on the outside of the segment at a certain point along the circumference of the shield tail grease cavity. W Assuming the forward breakdown pressure of a single shield tail brush is 'a' and the reverse breakdown pressure is 'b', then the pressure values ​​of each cavity satisfy the following judgment conditions: 0≤P1≤b, a≤P2-P1≤b, a≤P3-P2≤b, a≤P W -P3≤b, if the pressure values ​​at all points meet the above judgment conditions, the grease injection requirement is determined to be that the shield tail seal grease injection system is grease injected in the conventional manner. If the above judgment conditions are not judged, for example, if the pressure value at a certain point in a shield tail grease chamber is lower than the lower limit of the above judgment conditions, then the grease injection requirement is determined to be to increase the grease injection on both sides of that point; or, for example, if the pressure value at a certain point in a shield tail grease chamber is higher than the upper limit of the above judgment conditions, then the grease injection on both sides of that point is stopped until the above judgment conditions are met.

[0050] (3) The values ​​of a and b in condition (2) will change with the size of the shield tail gap value H at that point, and the values ​​of a and b are directly proportional to the shield tail gap value H.

[0051] (4) Compare the temperature value T at a certain point on the circumference of the shield tail grease cavity with the grouting temperature T on the outside of the segment. WIf the judgment condition is met: T > T W If the moisture content W = 0, then the required grease injection is determined to be a conventional grease injection strategy; if the judgment condition is met: T ≤ T W If the moisture content W > 50%, then the required grease injection is to increase the grease injection on both sides of this point.

[0052] (5) Compare the pressure values ​​P at various points along the circumference of a single shield tail grease chamber. ij (1≤i≤3,1≤j≤8), if the judgment condition is met: the pressure at a certain point is higher than the preset threshold, then the grease injection requirement is to stop grease injection on both sides of that point; if the judgment condition is met: the pressure at a certain point is lower than the preset threshold, then the grease injection requirement is to increase grease injection on both sides of that point.

[0053] (6) Compare the wear value L of the front guard plate of the shield tail brush, and determine whether L exceeds the safety threshold Y according to the judgment condition. If the judgment condition 0≤L≤Y is met, the grease injection requirement is to perform grease injection. If the judgment condition L≥Y is met, the grease injection requirement is to increase the grease injection on both sides of the point to ensure the sealing ability of the shield tail brush at the point.

[0054] After the intelligent diagnostic module performs the above processing in sequence, it transmits the processing results of each time period to the PLC. After receiving the signal, the PLC sends an instruction to the control module. The control module controls the solenoid valve to open or close, thereby controlling whether the grease injection channel is open, completing the closed-loop control and precise grease injection of the tail seal system.

[0055] like Figure 4 The diagram shown is a schematic diagram of the shield tail sealing control system of a tunnel boring machine in one embodiment of the present invention. In one embodiment, the intelligent control subsystem for shield tail sealing grease injection includes: a control module 401 connected to the coil end of the solenoid valve.

[0056] The PLC module 301 is also used for the grease injection requirements, generating switching instructions to control the grease injection channel, and sending them to the control module 401;

[0057] The control module 401 is used to control the solenoid valve to perform the following actions after receiving a switching command:

[0058] When the command is open, the solenoid valve coil is energized and the contacts close.

[0059] When the command is "off", the solenoid valve coil is de-energized and the contacts open.

[0060] In a specific embodiment, the intelligent diagnostic module can perform logical judgment and trend warning on key parameters such as the status parameters (pressure, temperature and moisture content) of each point in the shield tail grease chamber, the grouting status parameters (pressure and temperature) on the outside of the segment, the shield tail gap value, and the wear value of the front guard plate of the tail brush, and generate instruction information to transmit to the control module. After receiving the instruction information, the control module starts to control the start and stop of the shield tail grease pump and the opening and closing of the solenoid valves of each grease pipe, thereby achieving precise grease injection.

[0061] like Figure 5 The diagram shows the schematic of the shield tail sealing control system in an embodiment of the present invention. In this embodiment, an intelligent diagnostic subsystem is used to determine the grease injection requirements based on the state values ​​and corresponding judgment conditions of various points within the shield tail grease chamber, the state values ​​and corresponding judgment conditions of the grouting outside the tunnel segments, the wear amount and corresponding judgment conditions of the shield tail brush front guard plate, and the gap value and corresponding judgment conditions between the shield tail and the tunnel segments. Based on the judgment results, the opening and closing of the grease injection channels are controlled, and grease is injected into the shield tail sealing system. Through precise measurement of the sensing data at the front end of each subsystem, the state of the shield tail seal can be monitored in real time, enabling control of shield tail seal grease injection and saving on shield tail seal grease injection costs.

[0062] This invention also provides a method for controlling the tail seal of a tunnel boring machine (TBM), as described in the following embodiments. Since the principle behind this device is similar to that of a TBM tail seal control system, the implementation of this method can be found in the implementation of the TBM tail seal control system, and repeated details will not be elaborated further.

[0063] like Figure 6 The diagram shows a flowchart of a shield tail sealing control method for a tunnel boring machine according to an embodiment of the present invention. The method includes:

[0064] Step 601: Use the shield tail grease chamber status monitoring subsystem to monitor the status values ​​of each point in the shield tail grease chamber in real time;

[0065] Step 602: The status value of grouting on the outside of the tunnel segment is monitored in real time using the grouting status monitoring subsystem on the outside of the tunnel segment;

[0066] Step 603: Use the tail brush wear monitoring subsystem to monitor the wear of the shield tail brush front guard plate in real time;

[0067] Step 604: Measure the gap between the shield tail and the tunnel lining segments in real time using the shield tail gap measurement subsystem;

[0068] Step 605: Using the intelligent control subsystem for shield tail sealing grease injection, determine the grease injection requirements based on the status values ​​and corresponding judgment conditions of each point in the shield tail grease chamber, the status values ​​and corresponding judgment conditions of the grouting outside the tunnel segment, the wear amount of the shield tail brush front guard plate and corresponding judgment conditions, and the gap value between the shield tail and the tunnel segment and corresponding judgment conditions; and control the opening and closing of the grease injection channel according to the grease injection requirements.

[0069] This invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described shield tail sealing control method for tunnel boring machines.

[0070] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described shield tail sealing control method for tunnel boring machines.

[0071] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described shield tail sealing control method for tunnel boring machines.

[0072] Based on the construction experience of tunnel boring machines under different geological conditions, dynamic adjustment of grease injection is carried out. In order to accurately collect the status information in the tail brush cavity and overcome the difficulties of difficult cable exit and narrow space in the tail brush cavity, the tail grease cavity status monitoring subsystem adopts a series connection to upload the parameter information collected by multiple modules. Alternative implementation methods of this invention include: (1) The parameter information collected by multiple modules can be uploaded using a single cable, resulting in insufficient tail brush cavity parameter information. (2) The parameter information collected by each module can be uploaded through wireless communication, but the disadvantage is that the information is easily lost and the surrounding metal has too much influence on the wireless signal.

[0073] In this embodiment of the invention, an intelligent diagnostic subsystem is used to determine grease injection requirements based on the status values ​​and corresponding judgment conditions of various points within the shield tail grease chamber, the status values ​​and corresponding judgment conditions of grouting outside the tunnel segments, the wear amount and corresponding judgment conditions of the shield tail brush front guard plate, and the gap value and corresponding judgment conditions between the shield tail and the tunnel segments. Based on the judgment results, the opening and closing of the grease injection channels are controlled, and grease is injected into the shield tail sealing system. Through precise measurement of front-end sensing data from each subsystem, the status of the shield tail seal can be monitored in real time, enabling control of shield tail seal grease injection and saving on shield tail seal grease injection costs.

[0074] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0075] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0076] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0077] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0078] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A shield tail sealing control system for a tunnel boring machine, characterized in that, include: The system includes: shield tail grease chamber status monitoring subsystem, segment outer grouting status monitoring subsystem, tail brush wear monitoring subsystem, shield tail gap measurement subsystem, and shield tail sealing grease injection intelligent control subsystem. The shield tail grease chamber status monitoring subsystem is used to: monitor the status values ​​of each point in the shield tail grease chamber in real time; The segment external grouting status monitoring subsystem is used to: monitor the status values ​​of the segment external grouting in real time; The tail brush wear monitoring subsystem is used to: monitor the wear amount of the front guard plate of the shield tail brush in real time; The shield tail gap measurement subsystem is used to: measure the gap between the shield tail and the tunnel lining segments in real time; The intelligent control subsystem for shield tail sealing grease injection is used to: determine the grease injection requirements based on the status values ​​and corresponding judgment conditions of each point in the shield tail grease chamber, the status values ​​and corresponding judgment conditions of the grouting outside the segment, the wear amount and corresponding judgment conditions of the shield tail brush front guard plate, and the gap value and corresponding judgment conditions between the shield tail and the segment. Control the opening and closing of the grease injection channel according to the grease injection requirements; The intelligent control subsystem for shield tail sealing grease injection includes: a PLC module and an intelligent diagnostic module; PLC modules are used for: It receives data from the data acquisition module and transmits it to the intelligent diagnostic module; Receive the grease injection request sent by the intelligent diagnostic module, and control the opening and closing of the grease injection channel according to the grease injection request; The intelligent diagnostic module is used for: The data received from the PLC module is input into the intelligent diagnostic algorithm. The intelligent diagnostic algorithm determines the grease injection requirements based on the status values ​​and corresponding judgment conditions of each point in the shield tail grease chamber, the status values ​​and corresponding judgment conditions of the grouting on the outside of the segment, the wear amount and corresponding judgment conditions of the shield tail brush front guard plate, and the gap value and corresponding judgment conditions between the shield tail and the segment. The grease injection requirements are then transmitted to the PLC module. The intelligent diagnostic module performs the following processing: (1) Display all front-end sensing information to the host computer to meet the two control modes of the shield tail sealing grease injection system: pressure and quantity. (2) Compare the pressure values ​​P1 in the front cavity, P2 in the middle cavity, P3 in the rear cavity, and P on the outside of the grouting chamber along the circumferential direction of the shield tail grease cavity. W Let the forward breakdown pressure of a single shield tail brush be *a*, and the reverse breakdown pressure be *b*. Then the pressure values ​​of each cavity satisfy the following judgment conditions: 0 ≤ P1 ≤ b, a ≤ P2 - P1 ≤ b, a ≤ P3 - P2 ≤ b, a ≤ P W -P3≤b, if the pressure values ​​at all points meet the above judgment conditions, it is determined that the grease injection requirement is for the shield tail seal grease injection system to be grease injected in the conventional manner. If the above judgment conditions are not judged, and the pressure value at the point of the shield tail grease cavity is lower than the lower limit of the above judgment conditions, it is determined that the grease injection requirement is to increase the grease injection on both sides of that point. If the pressure value at the point of the shield tail grease cavity is higher than the upper limit of the above judgment conditions, then the grease injection on both sides of that point is stopped until the above judgment conditions are met. (3) The values ​​of a and b in condition (2) will change with the size of the shield tail gap value H at that point, and the values ​​of a and b are directly proportional to the shield tail gap value H; (4) Compare the temperature value T at a certain point on the circumference of the shield tail grease chamber with the grouting temperature T on the outside of the segment. W If the judgment condition is met: T > T W If the moisture content W=0, then the required grease injection is determined to be a conventional grease injection strategy; if the judgment condition is met: T≤T W If the moisture content W > 50%, then the required grease injection is to increase the grease injection on both sides of this point. (5) Compare the pressure values ​​P at various points along the circumference of a single shield tail grease chamber. ij 1≤i≤3, 1≤j≤8. If the judgment condition is met: the pressure at the point is higher than the preset threshold, then the grease injection requirement is to stop grease injection on both sides of the point. If the judgment condition is met: the pressure at the point is lower than the preset threshold, then the grease injection requirement is to increase grease injection on both sides of the point. (6) Compare the wear value L of the front guard plate of the shield tail brush, and determine whether L exceeds the safety threshold Y according to the judgment condition. If the judgment condition 0≤L≤Y is met, the grease injection requirement is to perform grease injection. If the judgment condition L≥Y is met, the grease injection requirement is to increase the grease injection on both sides of the point to ensure the sealing ability of the shield tail brush at the point. After the intelligent diagnostic module performs the above processing in sequence, it transmits the processing results of each time period to the PLC. After receiving the signal, the PLC sends an instruction to the control module. The control module controls the solenoid valve to open or close, thereby controlling whether the grease injection channel is open, completing the closed-loop control and precise grease injection of the tail seal system.

2. The system as described in claim 1, characterized in that, The state values ​​of each point within the shield tail grease chamber include pressure, temperature, and water content; The grouting status values ​​on the outside of the tunnel lining segments include pressure and temperature values.

3. The system as described in claim 2, characterized in that, The intelligent control subsystem for shield tail sealing grease injection includes: a data acquisition module; The data acquisition module is used to: preprocess the received status values ​​of each point in the shield tail grease chamber, the status values ​​of grouting on the outside of the tunnel segment, the wear amount of the shield tail brush front guard plate, and the gap value between the shield tail and the tunnel segment, and convert them into data formed by general signals.

4. The system as described in claim 2, characterized in that, The intelligent control subsystem for shield tail sealing grease injection includes: a control module connected to the coil end of the solenoid valve; The PLC module is also used to generate switching commands for controlling the grease injection channel according to the grease injection requirements, and send them to the control module; Upon receiving a switching command, the control module controls the solenoid valve to perform the following actions: When the command is open, the solenoid valve coil is energized and the contacts close. When the command is "off", the solenoid valve coil is de-energized and the contacts open.

5. A method for controlling the tail seal of a tunnel boring machine, characterized in that, include: The status values ​​of each point in the shield tail grease chamber are monitored in real time using the shield tail grease chamber status monitoring subsystem. The status values ​​of grouting on the outside of the tunnel segments are monitored in real time using the grouting status monitoring subsystem on the outside of the tunnel segments. The wear of the shield tail brush front guard plate is monitored in real time using the tail brush wear monitoring subsystem; The shield tail gap measurement subsystem is used to measure the gap between the shield tail and the tunnel lining segments in real time. The intelligent control subsystem for shield tail sealing grease injection determines the grease injection requirements based on the status values ​​and corresponding judgment conditions of each point in the shield tail grease chamber, the status values ​​and corresponding judgment conditions of the grouting outside the segment, the wear amount and corresponding judgment conditions of the shield tail brush front guard plate, and the gap value and corresponding judgment conditions between the shield tail and the segment. Control the opening and closing of the grease injection channel according to the grease injection requirements; The intelligent control subsystem for shield tail sealing grease injection includes: a PLC module and an intelligent diagnostic module; PLC modules are used for: It receives data from the data acquisition module and transmits it to the intelligent diagnostic module; Receive the grease injection request sent by the intelligent diagnostic module, and control the opening and closing of the grease injection channel according to the grease injection request; The intelligent diagnostic module is used for: The data received from the PLC module is input into the intelligent diagnostic algorithm. The intelligent diagnostic algorithm determines the grease injection requirements based on the status values ​​and corresponding judgment conditions of each point in the shield tail grease chamber, the status values ​​and corresponding judgment conditions of the grouting on the outside of the segment, the wear amount and corresponding judgment conditions of the shield tail brush front guard plate, and the gap value and corresponding judgment conditions between the shield tail and the segment. The grease injection requirements are then transmitted to the PLC module. The intelligent diagnostic module performs the following processing: (1) Display all front-end sensing information to the host computer to meet the two control modes of the shield tail sealing grease injection system: pressure and quantity. (2) Compare the pressure values ​​P1 in the front cavity, P2 in the middle cavity, P3 in the rear cavity, and P on the outside of the grouting chamber along the circumferential direction of the shield tail grease cavity. W Let the forward breakdown pressure of a single shield tail brush be *a*, and the reverse breakdown pressure be *b*. Then the pressure values ​​of each cavity satisfy the following judgment conditions: 0 ≤ P1 ≤ b, a ≤ P2 - P1 ≤ b, a ≤ P3 - P2 ≤ b, a ≤ P W -P3≤b, if the pressure values ​​at all points meet the above judgment conditions, it is determined that the grease injection requirement is for the shield tail seal grease injection system to be grease injected in the conventional manner. If the above judgment conditions are not judged, and the pressure value at the point of the shield tail grease cavity is lower than the lower limit of the above judgment conditions, it is determined that the grease injection requirement is to increase the grease injection on both sides of that point. If the pressure value at the point of the shield tail grease cavity is higher than the upper limit of the above judgment conditions, then the grease injection on both sides of that point is stopped until the above judgment conditions are met. (3) The values ​​of a and b in condition (2) will change with the size of the shield tail gap value H at that point, and the values ​​of a and b are directly proportional to the shield tail gap value H; (4) Compare the temperature value T at a certain point on the circumference of the shield tail grease chamber with the grouting temperature T on the outside of the segment. W If the judgment condition is met: T > T W If the moisture content W=0, then the required grease injection is determined to be a conventional grease injection strategy; if the judgment condition is met: T≤T W If the moisture content W > 50%, then the required grease injection is to increase the grease injection on both sides of this point. (5) Compare the pressure values ​​P at various points along the circumference of a single shield tail grease chamber. ij 1≤i≤3, 1≤j≤8. If the judgment condition is met: the pressure at the point is higher than the preset threshold, then the grease injection requirement is to stop grease injection on both sides of the point. If the judgment condition is met: the pressure at the point is lower than the preset threshold, then the grease injection requirement is to increase grease injection on both sides of the point. (6) Compare the wear value L of the front guard plate of the shield tail brush, and determine whether L exceeds the safety threshold Y according to the judgment condition. If the judgment condition 0≤L≤Y is met, the grease injection requirement is to perform grease injection. If the judgment condition L≥Y is met, the grease injection requirement is to increase the grease injection on both sides of the point to ensure the sealing ability of the shield tail brush at the point. After the intelligent diagnostic module performs the above processing in sequence, it transmits the processing results of each time period to the PLC. After receiving the signal, the PLC sends an instruction to the control module. The control module controls the solenoid valve to open or close, thereby controlling whether the grease injection channel is open, completing the closed-loop control and precise grease injection of the tail seal system.

6. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method of claim 5.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method of claim 5.

8. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the method of claim 5.

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