Shield tunneling machine tunnel excavation precision control method and device and computer storage medium

Abstract

The invention discloses a shield tunneling machine tunnel excavation precision control method and device and a computer storage medium, and relates to the technical field of tunnel construction, and the method comprises the steps: obtaining a construction sequence axis set of a shield tunneling machine, and obtaining shield tunneling machine parameters to construct a finite element simulation model; acquiring foam flow and soil parameters of the shield tunneling machine in real time, and importing the foam flow and the soil parameters into the finite element simulation model; according to the method, the abrasion loss of the cutter is obtained according to the soil body parameters, meanwhile, the abrasion loss of the cutter is corrected through the foam flow of the shield tunneling machine, the cutter abrasion condition close to the real condition is obtained, meanwhile, the abrasion loss of the shield tunneling machine is calculated, and tunnel axis deviation early warning information is generated when the abrasion loss of the shield tunneling machine exceeds the threshold value. And according to the set threshold value, when the abrasion loss of the cutter exceeds the threshold value, tunnel axis deviation early warning information is generated to prompt an operator of the shield tunneling machine, so that timely processing is facilitated, the condition of tunnel axis deviation is avoided, and the effect of controlling the tunnel excavation precision of the shield tunneling machine is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and in particular to a shield machine tunnel excavation accuracy control method, equipment and computer storage medium. Background Art

[0002] The shield machine is a large-scale mechanical equipment specially used for tunnel excavation. The soil layer is cut by the rotation of the tunneling head and the blades on the cutter disc. The cut soil layer is transported to the rear soil transport device through a screw conveyor, and finally the soil layer is transported out of the tunnel. At the same time, the shield machine supports and stabilizes the structure of the tunnel through a support system to ensure construction safety. Specifically, the cutting head of the shield machine is usually composed of a cutter and a tunneling shield. The cutter is responsible for cutting underground rocks and soil, and the tunneling 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 the various actions of the shield machine to push the cutting head forward.

[0003] When the shield machine is excavating, the cutter needs to cut the soil. After the cutter is worn, in addition to the reduced work efficiency, the cutting ability and precision of the cutter are reduced. For example, in hard rock formations, after the cutter is worn, the cutterhead cannot cut the rock in the predetermined direction and angle, which will cause the excavation direction of the shield machine to deviate. Because the cutting force of the worn cutter on the rock is uneven, the shield machine is subjected to an unbalanced reaction force during the advancement process, causing the tunnel axis to deviate from the designed route. This deviation may be in the horizontal direction or in the vertical direction, which will have many adverse effects on the subsequent tunnel construction and use, and ultimately cause the axis of the tunnel to deviate, affecting the construction of the project. Summary of the invention

[0004] The embodiment of the present invention provides a shield machine tunnel excavation accuracy control method, equipment and computer storage medium, which can calculate the tool wear amount according to the operating parameters of the shield machine, and can issue an early warning when the tunnel axis may deviate through the set threshold to avoid affecting the project.

[0005] A shield machine tunnel excavation accuracy control method comprises the following steps: Obtain construction sequence axes of several shield machines to form a construction sequence axis set; The threshold value of shield machine tool wear affecting the tunnel axis is obtained by using the construction sequence axis set; 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.

[0006] Furthermore, the construction sequence axis includes soil parameters and shield machine tool wear, and 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 the construction sequence axis.

[0007] Furthermore, the soil parameters include hardness parameters and hardness distribution parameters.

[0008] Further, the following steps are included: 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.

[0009] Furthermore, the tunnel axes corresponding to all tool use cycles are obtained, 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.

[0010] Furthermore, 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.

[0011] Furthermore, 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.

[0012] Furthermore, 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 a second wear amount.

[0013] A computer device comprises: 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 above method by executing the computer instructions.

[0014] A computer-readable storage medium stores computer instructions, wherein the computer instructions are used to enable a computer to execute the above method.

[0015] The beneficial effects of the above technical solution provided by the embodiment of the present invention include at least: The present invention obtains the wear amount of the tool according to the soil parameters, and uses the foam flow rate of the shield machine to correct the wear amount of the tool, so as to obtain a tool wear condition close to the actual condition. 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.

[0016] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0017] The technical solution of the present invention is further described in detail below through the drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying 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 and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 The present invention is a flowchart of a method for controlling the tunnel excavation accuracy of a shield machine disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth 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.

[0020] Figure 1 A flow chart showing a method for controlling the tunnel excavation accuracy of a shield machine is shown, comprising the following steps: S1, obtain the construction sequence axes of several shield machines to form a construction sequence axis set.

[0021] The construction sequence axis is defined as: a linear coordinate system constructed based on the construction route, in which the origin is the starting point of the construction route, and the positive direction is from the starting point of the construction route to the end point of the construction route. In the above linear coordinate system, the parameters of tunnel construction (soil parameters, tool wear data) are mapped onto the linear coordinate system according to the positive direction of the construction route to form a construction sequence axis.

[0022] The above construction sequence axis acquisition process includes: S11, constructing a collection axis with the length of the construction route as the collection length; S12, constructing a straight line coordinate system on the length of the construction route, and constructing a number of collection points on the straight line coordinate system; S13, using the collection points to obtain the shield machine tool wear and soil parameters; S14, importing the acquired shield machine tool wear amount and soil parameters into the acquisition axis according to the coordinates to form a construction sequence axis.

[0023] The above soil parameters include hardness parameters and hardness distribution parameters.

[0024] The soil parameters and tool wear are obtained by measurement, where the tool wear data of a shield machine is composed of several sub-tool wear data.

[0025] S2, using the construction sequence axis set, obtains the threshold value of the shield machine tool wear affecting the tunnel axis.

[0026] Before that, the tool change node needs to be obtained.

[0027] The steps include: S21, identifying the tool replacement nodes on the construction sequence axis, and the tool usage cycle is defined as the period between tool replacement nodes.

[0028] Tool replacement includes full replacement or partial replacement. Regardless of the type of replacement, the definition of the tool life cycle is the life cycle of the sub-tools, that is, the tool life cycle of a shield machine is composed of the life cycles of several sub-tools.

[0029] S22, obtaining soil parameters and tool wear amounts of all collection points of the construction sequence axis of all tool use cycles.

[0030] From the obtained construction sequence axes of several shield machines, the wear amount of each shield machine's cutter and the corresponding soil parameters are taken out respectively.

[0031] S23, analyzing the soil parameters and tool wear to obtain a first analysis model of the soil parameters and tool wear.

[0032] The above analysis is used to obtain the relationship analysis model between the wear of shield machine sub-cutters and soil parameters, that is, the first analysis model is used to analyze the wear of different sub-cutters of the shield machine, and the wear of different sub-cutters of the shield machine is obtained by inputting soil parameters and cutter parameters.

[0033] The first analysis model is composed of a neural network. After training using tool parameters, tool wear and soil parameters as samples, it is found that the wear of different sub-tools can be calculated by inputting soil parameters and tool parameters.

[0034] 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. 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.

[0035] The above process also includes: From the tool wear and soil parameters corresponding to the abnormal tunnel axis, extract the sub-tool with abnormal wear; Calculate the wear of the sub-tools and extract the corresponding soil parameters; According to the soil parameters and the corresponding tool wear, the second analysis model of the abnormal tunnel axis, tool wear and soil parameters is obtained.

[0036] The second analysis model is composed of a neural network. After training with tunnel axis offset, tool wear and soil parameters as samples, the corresponding sub-tool wear, i.e. tool wear threshold, can be calculated by inputting soil parameters.

[0037] 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.

[0038] S3, construct a finite element simulation model using the construction sequence axis set and the obtained shield machine parameters.

[0039] S4, obtaining the shield machine foam flow and soil parameters in real time and importing them into the above finite element simulation model.

[0040] S5, calculating the shield machine tool wear amount, and when the shield machine tool wear amount exceeds the above threshold, generating tunnel axis deviation warning information.

[0041] The calculated shield machine tool wear includes: S51, inputting the soil parameters acquired in real time into a first analysis model to obtain a first wear amount; S52, calibrating the first wear amount by using the real-time acquired shield machine foam flow rate to obtain a second wear amount.

[0042] 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.

[0043] During the operation of the shield machine, the shield machine's foam flow and soil parameters are imported into the finite element simulation model, and the real-time foam output of the shield machine is used to correct the wear of the tool. When the wear of any of the sub-tools exceeds the threshold, it is judged that the tunnel axis may be abnormal, and a tunnel axis deviation warning message is generated to prompt the shield machine operator so that timely processing can be carried out to avoid the occurrence of tunnel axis deviation and achieve the effect of controlling the shield machine tunnel excavation accuracy.

[0044] After receiving the prompt, the shield machine operator can replace the sub-cutters with excessive wear or strengthen the control of the shield machine's posture to avoid the problem of axis deviation in the excavated tunnel.

[0045] A computer device comprises: 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 above method by executing the computer instructions.

[0046] A computer-readable storage medium stores computer instructions, wherein the computer instructions are used to enable a computer to execute the above method.

[0047] The present invention obtains the wear amount of the tool according to the soil parameters, and uses the foam flow rate of the shield machine to correct the wear amount of the tool, so as to obtain a tool wear condition close to the actual condition. 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, thereby achieving the effect of controlling the tunnel excavation accuracy of the shield machine.

[0048] It should be understood that the specific order or hierarchy of steps in the disclosed 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 protection of the present disclosure. The attached 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 described.

[0049] In the above detailed description, various features are grouped together in a single embodiment to simplify the 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 clearly stated in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0050] Those skilled in the art will also appreciate that the various illustrative logic blocks, modules, circuits, and algorithmic steps described in conjunction with the embodiments herein can all be implemented as electronic hardware, computer software, or a combination thereof. In order to clearly illustrate the interchangeability between hardware and software, various illustrative components, blocks, modules, circuits, and steps are generally described above around their functions. Whether such functions are implemented as hardware or software depends on specific applications and the design constraints imposed on the entire system. A skilled person can implement the described functions in an alternative manner for each specific application, but such implementation decisions should not be interpreted as departing from the scope of protection of the present disclosure.

[0051] The steps of the method or algorithm described in conjunction with the embodiments herein may be directly embodied as hardware, a software module executed by a processor, or a combination thereof. The software module may be located in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a mobile disk, a CD-ROM, or any other form of storage medium well known in the art. An exemplary storage medium is connected to the processor so that the processor can read information from the storage medium and can write information to the storage medium. Of course, the storage medium may also be an integral part of 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 be present in a user terminal as discrete components.

[0052] For software implementation, the techniques described in this application can be implemented with 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 coupled to the processor in a communication manner via various means, which are well known in the art.

[0053] The above description includes examples of one or more embodiments. Of course, it is impossible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may 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 protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", just as "including," is explained as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended 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 threshold value of shield machine tool wear affecting the tunnel axis is obtained by using the construction sequence axis set; 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 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 the construction sequence axis.

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

4. The method according to claim 2, characterized in that 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.

5. The method according to claim 4, characterized in that 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. 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.

6. The method according to claim 5, characterized in that 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.

7. The method according to claim 6, 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.

8. The method according to claim 7, 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.

9. 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 8 by executing the computer instructions.

10. 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 8.

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