A shield machine tunnel excavation precision control method, device and computer storage medium

Abstract

A method and device for controlling the tunnel excavation accuracy of a shield machine, and a computer storage medium, relate to the technical field of tunnel construction, and include the steps of obtaining a construction sequence axis set of a shield machine and obtaining shield machine parameters to construct a finite element simulation model; obtaining the shield machine foam flow and soil parameters in real time and importing them into the above-mentioned finite element simulation model; calculating the shield machine tool wear, and generating tunnel axis deviation warning information when the shield machine tool wear exceeds the above-mentioned threshold. The present invention obtains the tool wear according to the soil parameters, and uses the shield machine foam flow to correct the tool wear to obtain a tool wear condition close to the real one. At the same time, according to the set threshold, when the tool wear exceeds the threshold, a tunnel axis deviation warning information is generated to prompt the shield machine operator, so as to facilitate timely processing and avoid the occurrence of tunnel axis deviation, thereby achieving the effect of controlling the tunnel excavation accuracy of the shield machine.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and particularly relates to a method, device and computer storage medium for controlling the tunneling accuracy of a shield machine. Background Art

[0002] A shield machine is a large-scale mechanical equipment specifically used for tunnel boring. It cuts the soil layer through the rotation of the boring head and the blades on the cutter head, and conveys the cut soil layer to the soil conveying device at the rear through a screw conveyor, and finally transports the soil layer out of the tunnel. At the same time, the shield machine uses a support system to support and stabilize the structure of the tunnel to ensure construction safety. Specifically, the cutting head of the shield machine usually consists of a cutter and a boring shield. The cutter is responsible for cutting underground rocks and soil, and the boring shield plays a role in supporting and protecting the cutting head. The propulsion system consists of a hydraulic system and a propulsion mechanism, which is responsible for providing power and controlling various actions of the shield machine to push the cutting head forward.

[0003] When the shield machine is tunneling, the cutter needs to cut the soil body. After the cutter wears, in addition to the reduction in work efficiency, the cutting ability and accuracy of the cutter decrease. For example, in hard rock formations, when the cutter wears and the cutter head cuts the rock, it cannot be carried out in a predetermined direction and angle, which will cause the tunneling direction of the shield machine to deviate. Because the cutting force of the worn cutter on the rock is uneven, the shield machine receives an unbalanced reaction force during the propulsion process, resulting in the tunnel axis deviating from the designed route. This deviation may be in the horizontal direction or the vertical direction, which will have many adverse effects on subsequent tunnel construction and use, and ultimately cause the tunnel axis to deviate, affecting the engineering construction. Summary of the Invention

[0004] Embodiments of the present invention provide a method, device and computer storage medium for controlling the tunneling accuracy of a shield machine, which can calculate the cutter wear amount according to the operating parameters of the shield machine, and can give an early warning when the tunnel axis may deviate through a set threshold, so as to avoid affecting the project.

[0005] A method for controlling the tunneling accuracy of a shield machine includes the following steps:

[0006] Obtain the construction sequence axes of several shield machines to form a construction sequence axis set;

[0007] Use the construction sequence axis set to obtain the threshold value of the influence of the cutter wear amount of the shield machine on the tunnel axis;

[0008] Use the construction sequence axis set and the obtained shield machine parameters to construct a finite element simulation model;

[0009] Real-time obtain the foam flow rate of the shield machine and the soil parameters and import them into the above finite element simulation model;

[0010] Calculate the tool wear of the shield machine. When the tool wear of the shield machine exceeds the above threshold, generate a tunnel axis deviation warning message.

[0011] Further, the construction sequence axis includes soil parameters and the tool wear of the shield machine. The acquisition process includes:

[0012] Construct a collection axis with the length of the construction route as the collection length;

[0013] Construct a linear coordinate system on the length of the construction route, and construct several collection points on the linear coordinate system;

[0014] Use the collection points to obtain the tool wear of the shield machine and the soil parameters;

[0015] Import the obtained tool wear of the shield machine and the soil parameters into the collection axis according to the coordinates to form a construction sequence axis.

[0016] Further, the soil parameters include a hardness parameter and a hardness distribution parameter.

[0017] Further, it includes the following steps:

[0018] Identify the tool replacement nodes on the construction sequence axis, and define the period between tool replacement nodes as the tool usage period;

[0019] Obtain the soil parameters and tool wear of all collection points on the construction sequence axis during all tool usage periods;

[0020] Analyze the above soil parameters and tool wear to obtain a first analysis model of the soil parameters and tool wear.

[0021] Further, obtain the tunnel axes corresponding to all tool usage periods, extract the abnormal tunnel axes and the corresponding tool wear and soil parameters among them, and obtain a second analysis model of the abnormal tunnel axes and the tool wear and soil parameters according to the soil parameters and the corresponding tool wear.

[0022] Further, the process of obtaining the threshold of the influence of the tool wear of the shield machine on the tunnel axis includes: using the second analysis model to construct different tool wear thresholds for different soil parameters.

[0023] Further, calculating the tool wear of the shield machine includes:

[0024] Input the soil parameters obtained in real time into the first analysis model to obtain a first wear amount;

[0025] Calibrate the first wear amount using the foam flow rate of the shield machine obtained in real time to obtain a second wear amount.

[0026] Further, the calibration process includes: importing soil parameters and foam flow rate into a finite element simulation model for simulation, and calibrating the first wear amount according to the calculated wear amount to obtain the second wear amount.

[0027] A computer device includes: a memory and a processor, which are communicatively connected to each other. The memory stores computer instructions, and the processor executes the computer instructions to execute the above method.

[0028] A computer-readable storage medium stores computer instructions thereon, and the computer instructions are used to cause a computer to execute the above method.

[0029] The beneficial effects of the above technical solutions provided by the embodiments of the present invention at least include:

[0030] The present invention obtains the wear amount of the cutter according to soil parameters, and at the same time corrects the wear amount of the cutter by using the foam flow rate of the shield machine to obtain a cutter wear condition close to the real situation. At the same time, according to the set threshold, when the cutter wear amount exceeds the threshold, a tunnel axis deviation warning message is generated to prompt the shield machine operator, so as to facilitate timely processing and avoid the occurrence of tunnel axis deviation.

[0031] Other features and advantages of the present invention will be described in the following specification, and part of them will become obvious from the specification, or be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained by the structures specifically pointed out in the written specification, claims, and drawings.

[0032] The technical solutions of the present invention will be further described in detail below with reference to the drawings and embodiments. Description of the Drawings

[0033] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the drawings:

[0034] Figure 1 is a flowchart of a method for controlling the tunneling accuracy of a shield machine disclosed in an embodiment of the present invention. Detailed Embodiments

[0035] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0036] Figure 1 A flowchart showing a method for controlling the tunneling accuracy of a shield machine, including the following steps:

[0037] S1. Obtain the construction sequence axes of several shield machines to form a set of construction sequence axes.

[0038] The construction sequence axis is defined as: a rectangular coordinate system constructed with the construction line, where the origin is the starting point of the construction line, the positive direction is from the starting point of the construction line to the ending point of the construction line. In the above rectangular coordinate system, map the parameters of tunnel construction (soil parameters, tool wear data) onto the rectangular coordinate system along the positive direction of the construction line to form a construction sequence axis.

[0039] The above process of obtaining the construction sequence axis includes:

[0040] S11. Construct a collection axis with the length of the construction line as the collection length;

[0041] S12. Construct a rectangular coordinate system on the length of the construction line and construct several collection points on the rectangular coordinate system;

[0042] S13. Use the collection points to obtain the tool wear amount of the shield machine and soil parameters;

[0043] S14. Import the obtained tool wear amount of the shield machine and soil parameters into the collection axis according to the coordinates to form a construction sequence axis.

[0044] The above soil parameters include hardness parameters and hardness distribution parameters.

[0045] Both the soil parameters and the tool wear amount are obtained by measurement. Among them, the tool wear data of one shield machine consists of several sub-tool wear data.

[0046] S2. Use the set of construction sequence axes to obtain the threshold value of the influence of the tool wear amount of the shield machine on the tunnel axis.

[0047] Before that, it is also necessary to obtain the tool replacement nodes.

[0048] Including the following steps:

[0049] S21. Identify the tool replacement nodes on the construction sequence axis. The period between tool replacement nodes is defined as the tool usage period.

[0050] Tool replacement includes full replacement or partial replacement. Regardless of which replacement method is used, the definition of the tool usage period is the usage period of the sub-tools. That is, the tool usage period of one shield machine consists of the usage periods of several sub-tools.

[0051] S22. Obtain the soil parameters and tool wear amounts of all the collection points on the construction sequence axis during the entire tool usage period.

[0052] From the construction sequence axes of several shield machines obtained, respectively take out the wear amount of each sub-tool of the shield machine and the corresponding soil parameters.

[0053] S23. Analyze the above-mentioned soil parameters and tool wear amounts to obtain a first analysis model of the relationship between soil parameters and tool wear amounts.

[0054] The above analysis is used to obtain an analysis model of the relationship between the wear amount of the shield machine's sub-tools and soil parameters. That is, the first analysis model is used to analyze the wear amounts of different sub-tools of the shield machine, and by inputting soil parameters and tool parameters, the wear amounts of different sub-tools of the shield machine can be obtained.

[0055] The first analysis model is composed of a neural network. After being trained using tool parameters, tool wear amounts, and soil parameters as samples, it can calculate the wear amounts of different sub-tools by inputting soil parameters and tool parameters.

[0056] Obtain the tunnel axes corresponding to the entire tool usage cycle, take out the abnormal tunnel axes and the corresponding tool wear amounts and soil parameters among them, and obtain a second analysis model of the abnormal tunnel axes, tool wear amounts, and soil parameters according to the soil parameters and the corresponding tool wear amounts.

[0057] The above process further includes:

[0058] From the tool wear amounts and soil parameters corresponding to the abnormal tunnel axes, take out the sub-tools with abnormal wear amounts among them;

[0059] Calculate the wear amount of the sub-tool and take out the corresponding soil parameters;

[0060] Obtain a second analysis model of the abnormal tunnel axes, tool wear amounts, and soil parameters according to the soil parameters and the corresponding tool wear amounts.

[0061] The second analysis model is composed of a neural network. After being trained using tunnel axis offset amounts, tool wear amounts, and soil parameters as samples, it can calculate the corresponding wear amount of the sub-tool, that is, the tool wear amount threshold, by inputting soil parameters.

[0062] The process of obtaining the threshold of the influence of the shield machine tool wear amount on the tunnel axis includes: using the second analysis model to construct different tool wear amount thresholds for different soil parameters.

[0063] S3. Use the construction sequence axis set and the obtained shield machine parameters to construct a finite element simulation model.

[0064] S4. Real-time obtain the shield machine foam flow rate and soil parameters and import them into the above finite element simulation model.

[0065] S5. Calculate the tool wear of the shield machine. When the tool wear of the shield machine exceeds the above threshold, generate a tunnel axis deviation warning message.

[0066] Calculating the tool wear of the shield machine includes:

[0067] S51. Input the soil parameters obtained in real time into the first analysis model to obtain the first wear amount;

[0068] S52. Calibrate the first wear amount by using the foam flow rate of the shield machine obtained in real time to obtain the second wear amount.

[0069] The calibration process includes: Importing the soil parameters and the foam flow rate into the finite element simulation model for simulation, and calibrating the first wear amount according to the calculated wear amount to obtain the second wear amount.

[0070] During the operation of the shield machine, by obtaining the foam flow rate of the shield machine and the soil parameters and importing them into the finite element simulation model, and using the real-time foam output condition of the shield machine to correct the tool wear situation. When the wear amount of any one of the sub-tools exceeds the threshold, it is determined that the tunnel axis may be abnormal, and a tunnel axis deviation warning message is generated to prompt the shield machine operator, so as to facilitate timely processing and avoid the occurrence of tunnel axis deviation, achieving the effect of controlling the tunnel excavation accuracy of the shield machine.

[0071] After receiving the prompt, the shield machine operator can take measures such as replacing the sub-tools with excessive wear amount or strengthening the attitude control of the shield machine to avoid the problem of axis deviation in the excavated tunnel.

[0072] A computer device includes: a memory and a processor, which are communicatively connected to each other. The memory stores computer instructions, and the processor executes the above method by executing the computer instructions.

[0073] A computer-readable storage medium stores computer instructions thereon, and the computer instructions are used to cause a computer to execute the above method.

[0074] The present invention obtains the tool wear amount according to the soil parameters, and at the same time uses the foam flow rate of the shield machine to correct the tool wear amount to obtain a tool wear situation close to the real one. At the same time, according to the set threshold, when the tool wear amount exceeds the threshold, a tunnel axis deviation warning message is generated to prompt the shield machine operator, so as to facilitate timely processing and avoid the occurrence of tunnel axis deviation, achieving the effect of controlling the tunnel excavation accuracy of the shield machine.

[0075] It should be understood that the specific order or hierarchy of steps in the disclosure process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of the present disclosure. The appended method claims present the elements of the various steps in an exemplary order and are not intended to be limited to the specific order or hierarchy recited.

[0076] In the above detailed description, various features are combined in a single embodiment to simplify the present disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are expressly recited in each claim. On the contrary, as reflected by the appended claims, the invention lies in a state less than all the features of the single disclosed embodiment. Accordingly, the appended claims are hereby expressly incorporated into the detailed description, where each claim stands on its own as a separate preferred embodiment of the invention.

[0077] Those skilled in the art should also understand that the various illustrative logical blocks, modules, circuits, and algorithmic steps described in connection with the embodiments herein can be implemented as electronic hardware, computer software, or combinations thereof. To clearly illustrate the interchangeability of hardware and software, the various illustrative components, blocks, modules, circuits, and steps have been generally described in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and the design constraints imposed on the overall system. Skilled artisans may implement the described functionality in a variant manner for each particular application, but such implementation decisions should not be construed as departing from the scope of the present disclosure.

[0078] The steps of a method or algorithm described in connection with the embodiments herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination thereof. The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may be located in an ASIC. The ASIC may be located in a user terminal. Of course, the processor and the storage medium may also exist as discrete components in a user terminal.

[0079] For software implementation, the techniques described in this application can be implemented by modules (e.g., procedures, functions, etc.) that perform the functions described in this application. These software codes can be stored in a memory unit and executed by a processor. The memory unit can be implemented within the processor or outside the processor. In the latter case, it is communicatively coupled to the processor via various means, which are well known in the art.

[0080] The above description includes examples of one or more embodiments. Of course, it is not possible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but those of ordinary skill in the art should recognize that the various embodiments can be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. In addition, with respect to the term "comprising" as used in the specification or claims, this term is inclusive in a manner similar to the term "including" as interpreted when used as a transitional word in a claim. Further, any use of the term "or" in the claims or specification is to mean "non-exclusive or".

Claims

1. A shield machine tunnel excavation accuracy control method, characterized in that: The following steps are involved: Obtain construction sequence axes of several shield machines to form a construction sequence axis set; The construction sequence axis includes soil parameters and shield machine tool wear. The acquisition process includes: Construct a collection axis with the length of the construction route as the collection length; Construct a straight line coordinate system along the length of the construction route, and construct several collection points on the straight line coordinate system; Use the collection points to obtain the shield machine tool wear and soil parameters; The acquired shield machine tool wear and soil parameters are imported into the acquisition axis according to the coordinates to form a construction sequence axis; the threshold value of the shield machine tool wear affecting the tunnel axis is obtained by using the construction sequence axis set; The steps include: Identify the tool replacement nodes on the construction sequence axis, and the tool use cycle is defined between the tool replacement nodes; Obtain soil parameters and tool wear at all collection points of the construction sequence axis of the entire tool use cycle; The soil parameters and tool wear are analyzed to obtain a first analysis model of the soil parameters and tool wear; The tunnel axes corresponding to all tool use cycles are obtained, and the abnormal tunnel axes and the corresponding tool wear and soil parameters are taken out, and the second analysis model of the abnormal tunnel axis, tool wear and soil parameters is obtained according to the soil parameters and the corresponding tool wear; The process of obtaining the threshold value of the shield machine cutter wear affecting the tunnel axis includes: using the second analysis model to construct different cutter wear threshold values ​​for different soil parameters; The finite element simulation model is constructed using the construction sequence axis set and the obtained shield machine parameters; Obtain the foam flow rate and soil parameters of the shield machine in real time and import them into the above finite element simulation model; The wear amount of the shield machine cutter is calculated, and when the wear amount of the shield machine cutter exceeds the above threshold, a tunnel axis deviation warning message is generated.

2. The method according to claim 1, characterized in that Soil parameters include hardness parameters and hardness distribution parameters.

3. The method according to claim 1, characterized in that The calculated shield machine tool wear includes: Inputting the soil parameters acquired in real time into the first analysis model to obtain a first wear amount; The first wear amount is calibrated by using the real-time acquisition of the shield machine foam flow rate to obtain the second wear amount.

4. The method according to claim 3, characterized in that The calibration process includes: importing soil parameters and foam flow into a finite element simulation model for simulation, calibrating the first wear amount according to the calculated wear amount, and obtaining the second wear amount.

5. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method according to any one of claims 1 to 4 by executing the computer instructions.

6. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the method according to any one of claims 1 to 4.

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