Shield cutting pile group cutter head cutter arrangement method and equipment

Abstract

The invention relates to a shield cutting pile group cutter head and cutter arrangement method and equipment. The method comprises the steps that rock stratum attributes of a construction area are obtained; determining a cutterhead structure form according to rock stratum attributes; calculating the cutterhead aperture ratio according to the rock stratum attributes; according to the total area of the cutterhead, the area demand coefficients of the various cutters, the distribution area radiuses of the various cutters, the number of the cutter distribution areas on the cutterhead and the weight coefficients of the cutter distribution areas on the cutterhead, the demand number of the various cutters on the cutterhead is calculated; according to the parameters of the cutter head and the parameters of various cutters, the number of the cutters on each track ring of the concentric circles in the concentric circle arrangement mode is calculated; the cutter service life under the current cutter arrangement mode is determined in real time; according to the service life of the cutter, the current cutter arrangement mode is optimized through a genetic algorithm or a particle swarm algorithm; the genetic algorithm or the particle swarm algorithm takes guarantee of the cutting efficiency as a constraint and takes maximization of the service life of the cutter as a target.

Description

Technical Field

[0001] The present application relates to the technical field of shield construction, and in particular to a method and equipment for arranging cutter heads of shield pile cutting cutters. Background Art

[0002] With the continuous advancement of urban infrastructure construction, subway rail transit construction faces more and more challenges. Among them, when the shield machine passes through the pile foundation of a building (structure), the traditional pile foundation treatment method, such as pile foundation replacement and manual bored pile removal of the intrusion pile foundation, has many problems such as high construction difficulty, high risk, high cost and long construction period.

[0003] When dealing with pile group cutting, the existing shield machines suffer from rapid tool wear and low excavation efficiency. Summary of the invention

[0004] In order to at least to some extent overcome the problems of rapid tool wear and low excavation efficiency in shield machines in the related art when dealing with pile group cutting, the present application provides a method and equipment for arranging cutter disc tools for shield cutting pile groups.

[0005] The scheme of this application is as follows:

[0006] According to a first aspect of an embodiment of the present application, a method for arranging cutter heads for cutting pile groups of a shield machine is provided, comprising:

[0007] Obtain rock formation properties in the construction area;

[0008] Determine the cutterhead structure according to the rock formation properties;

[0009] Calculating the cutterhead opening rate according to the rock formation properties;

[0010] The required number of each type of tool on the cutter disc is calculated based on the total area of ​​the cutter disc, the area requirement coefficient of each type of tool, the distribution area radius of each type of tool, the number of tool distribution areas on the cutter disc, and the weight coefficient of each tool distribution area on the cutter disc;

[0011] According to the parameters of the cutter head and various types of cutters, the number of cutters on each track circle of the concentric circle arrangement mode is calculated;

[0012] Determine tool life in real time under current tool arrangement;

[0013] According to the tool life, the current tool arrangement is optimized by genetic algorithm or particle swarm algorithm;

[0014] The genetic algorithm or particle swarm algorithm takes ensuring cutting efficiency as a constraint and maximizing tool life as a goal.

[0015] Preferably, calculating the cutterhead opening rate according to the rock formation properties includes:

[0016]

[0017] Where ξ represents the cutterhead opening ratio; p0 represents the static lateral earth pressure of the soil; p a represents active earth pressure; c represents soil cohesion; H represents the burial depth of the tunnel center; γ represents the soil bulk density; K0 represents the static lateral pressure coefficient of the soil; K1 represents the soil cohesion correction coefficient; K2 represents the soil friction angle correction coefficient; and L represents the length of the soil chamber.

[0018] Preferably, the method further comprises:

[0019] The spacing of the tool cutting paths is set with the goal of achieving full concrete cutting.

[0020] Preferably, the tool arrangement conditions include at least:

[0021] A main leading cutter is arranged on the lower side of the main cutter;

[0022] Auxiliary leading cutters are arranged on the left and right sides of the main cutter.

[0023] Preferably, the method further comprises:

[0024] Based on the cutting force distribution function, the tool arrangement follows the cutting force distribution optimization principle.

[0025] Preferably, according to the parameters of the cutter head and the parameters of various types of cutters, the number of cutters on each track circle of the concentric circles in the concentric circle arrangement mode is calculated, including:

[0026]

[0027] Among them, N i represents the number of tools on track circle i; D represents the diameter of the cutter head; α represents the tool angle; w c Indicates the average tool width; H m Indicates the average material hardness; Lc indicates the tool length.

[0028] Preferably, determining the tool life under the current tool arrangement in real time includes:

[0029] Real-time detection of tool wear through wear detection knives and multiple sensors;

[0030] According to the tool wear and construction progress, the tool life under the current tool arrangement is determined based on the prediction model.

[0031] Preferably, the method further comprises:

[0032] When geological changes occur in the construction area, the tool configuration and layout are adjusted according to the geological changes in the construction area.

[0033] Preferably, the method further comprises:

[0034] Adjust tool configuration and layout according to tool wear and construction progress.

[0035] According to a second aspect of an embodiment of the present application, there is provided a shield cutting pile group cutter head tool arrangement device, comprising:

[0036] Processor and memory;

[0037] The processor and the memory are connected via a communication bus:

[0038] Wherein, the processor is used to call and execute the program stored in the memory;

[0039] The memory is used to store a program, and the program is used to execute at least one of the above methods for arranging cutter heads of shield cutting pile groups.

[0040] The technical solution provided by the present application may include the following beneficial effects: the shield cutting pile cutter head tool arrangement method in the present technical solution includes: obtaining the rock properties of the construction area; determining the cutter head structure according to the rock properties; calculating the cutter head opening rate according to the rock properties; calculating the required number of various types of cutters on the cutter head according to the total area of ​​the cutter head, the area requirement coefficient of various types of cutters, the distribution area radius of various types of cutters, the number of tool distribution areas on the cutter head, and the weight coefficient of each tool distribution area on the cutter head; calculating the number of cutters on each trajectory circle of the concentric circles under the concentric circle arrangement mode according to the cutter head parameters and the parameters of various types of cutters; determining the tool life under the current tool arrangement mode in real time; optimizing the current tool arrangement mode according to the tool life by genetic algorithm or particle swarm algorithm; the genetic algorithm or particle swarm algorithm takes ensuring cutting efficiency as a constraint and maximizing the tool life as a goal.

[0041] In this technical solution, by obtaining the rock formation properties in the construction area and optimizing the cutter disc structure accordingly, it is possible to accurately adapt to the hardness, friction coefficient and other characteristics of different rock formations, ensure that the cutter cuts under the most appropriate conditions, and improve cutting efficiency. By calculating the required number of cutters, layout and service life of the cutters, and performing real-time monitoring, excessive wear or uneven wear can be avoided, thereby extending the service life of the cutters. By adjusting the cutter layout in real time, the cutter configuration can be adjusted according to geological changes, so that the shield machine can more flexibly respond to geologically complex construction environments and ensure the stability and efficiency of tunneling. By optimizing the cutter layout through genetic algorithms or particle swarm algorithms, the cutting efficiency is ensured while maximizing the service life of the cutters, and reducing the frequent replacement and maintenance costs caused by excessive wear of the cutters.

[0042] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0044] Figure 1 It is a schematic flow chart of a method for arranging cutter heads for cutting pile groups in a shield machine provided by an embodiment of the present application;

[0045] Figure 2 is a cross-sectional view of a cutter head tool arrangement provided by one embodiment of the present application;

[0046] Figure 3 is a top view of a cutter head tool arrangement provided by one embodiment of the present application;

[0047] Figure 4 It is a structural schematic diagram of a shield cutting pile group cutter head tool arrangement device provided by an embodiment of the present application.

[0048] Figure numerals: profiling knife - 101; peripheral protection knife - 102; peripheral knife - 103; grouting port protection knife - 104; main cutting knife - 105; fishtail knife - 106; injection port - 107; processor - 21; memory - 22. DETAILED DESCRIPTION

[0049] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0050] Figure 1 This is a schematic diagram of a process flow of a shield cutting pile group cutter head tool arrangement method provided by an embodiment of the present application, referring to Figure 1 , a shield cutting pile group cutter head tool arrangement method, comprising:

[0051] S11: Obtain rock formation properties in the construction area;

[0052] Rock formation properties include key parameters such as hardness, strength, and water content of the rock formation.

[0053] Preferably, in this embodiment, a rock formation attribute database can be established according to the rock formation attributes of the construction area.

[0054] S12: Determine the cutterhead structure according to the rock formation properties;

[0055] The cutter disc structures usually have three types: spoke type, spoke panel type, and panel type, and the corresponding opening rates are usually around 65%, 35%, and 20%.

[0056] The spoke cutterhead is designed as a bracket structure that radiates outward from the center of the hub. This structure has a high opening rate, generally up to 60%-95%, which ensures good soil fluidity and reduces the aggregation of clay. It is most suitable for loose geological conditions, such as sandy soil or soft soil, because its open design is conducive to soil discharge and air circulation.

[0057] The spoke panel cutterhead combines the advantages of the spoke and panel cutters. Some panels are added to the spokes to form a structure with a degree of closure between the two. The opening rate is relatively low, about 35%-50%. This design is suitable for more complex geological conditions and can better balance the stability and soil discharge efficiency during the excavation process. It is particularly suitable for sandy soil or semi-consolidated soil layers containing stones.

[0058] The panel cutter disc is a completely closed or semi-closed panel design, leaving only the necessary openings for the cutter to penetrate. The opening rate is low, about 30%. Due to the presence of the panel, it provides better structural rigidity and stability, protecting the cutter from impact. It is suitable for harder formations or soils with larger gravels, such as hard rock, frozen soil or formations with a lot of impurities. The stable structure of the panel cutter disc can effectively cope with high pressure and strong friction.

[0059] In actual practice, the open type without cutter disc is applicable to single sand and gravel, boulder and other strata. The open type without cutter disc should be used with caution when the construction area contains clay strata and the excavation surface is stable and difficult to control.

[0060] The spoke cutter disc is suitable for sandy gravel and waterless clay. The spoke cutter disc should be used with caution when the maximum particle size of the pebbles exceeds the slag discharge capacity of the screw conveyor.

[0061] The spoke panel cutterhead (including composite cutterhead) is applicable to composite formations, ordinary clay and gravel sand formations. Spoke panel cutterhead has the widest application range. It is used in both earth pressure balance shield and slurry balance shield.

[0062] The applicable strata for panel-type cutterheads are water-rich silt strata and silty fine sand strata, and they are usually only used in slurry balance shields.

[0063] Taking the geological conditions of the current construction area as a sand and gravel base as an example, a spoke type cutter disc is used.

[0064] S13: Calculate the cutterhead opening rate according to the rock formation properties;

[0065] Calculate the cutterhead opening rate based on rock formation properties, including:

[0066]

[0067] Where ξ represents the cutterhead opening ratio; p0 represents the static lateral earth pressure of the soil; p a represents active earth pressure; c represents soil cohesion; H represents the burial depth of the tunnel center; γ represents the soil bulk density; K0 represents the static lateral pressure coefficient of the soil; K1 represents the soil cohesion correction coefficient; K2 represents the soil friction angle correction coefficient; and L represents the length of the soil chamber.

[0068] Generally, K1 is 4.3 and K2 is 1.8.

[0069] S14: Calculate the required number of each type of cutting tool on the cutter disc according to the total area of ​​the cutter disc, the area requirement coefficient of each type of cutting tool, the radius of the distribution area of ​​each type of cutting tool, the number of cutting tool distribution areas on the cutter disc, and the weight coefficient of each cutting tool distribution area on the cutter disc;

[0070] Calculate tool pass formula:

[0071]

[0072] Among them, N i is the number of tools of type i; R is the total area of ​​the cutter head; A i is the area requirement coefficient of the i-th type of tool; R j is the radius of the tool distribution area; B j is the weight coefficient of the jth area; m is the number of tool distribution areas.

[0073] S15: Calculating the number of tools on each track of the concentric circles in the concentric circle arrangement mode according to the tool disc parameters and the parameters of various tools;

[0074] From a geometric perspective, the cutterhead tool arrangement methods mainly include Archimedean spiral arrangement method and concentric circle arrangement method. Usually, in order to better control the unbalanced torque and unbalanced radial force of the cutterhead during full-section excavation, the Archimedean spiral arrangement method is most commonly used. However, when the shield machine is cutting pile foundations, the tools involved in cutting piles are in dynamic changes, and it is difficult to use the Archimedean spiral arrangement method. Therefore, the concentric circle arrangement mode is used in this embodiment.

[0075] According to the parameters of the cutter head and various types of tools, the number of tools on each track circle of the concentric circle arrangement mode is calculated, including:

[0076]

[0077] Among them, N irepresents the number of tools on track circle i; D represents the diameter of the cutter head; α represents the tool angle; w c Indicates the average tool width; H m Indicates the average material hardness; Lc indicates the tool length.

[0078] S16: Determine the tool life under the current tool arrangement mode in real time;

[0079] S17: Optimizing the current tool arrangement mode by genetic algorithm or particle swarm algorithm according to tool life;

[0080] It should be noted that the genetic algorithm simulates the principles of natural selection and genetics and is suitable for dealing with complex search spaces and discrete optimization problems; while the particle swarm optimization algorithm imitates the predation behavior of bird flocks and is good at dealing with continuous optimization problems, especially in parameter optimization and function optimization.

[0081] Genetic algorithm or particle swarm algorithm takes cutting efficiency as constraint and maximizing tool life as goal.

[0082] In this technical solution, by obtaining the rock formation properties in the construction area and optimizing the cutter disc structure accordingly, it is possible to accurately adapt to the hardness, friction coefficient and other characteristics of different rock formations, ensure that the cutter cuts under the most appropriate conditions, and improve cutting efficiency. By calculating the required number of cutters, layout and service life of the cutters, and performing real-time monitoring, excessive wear or uneven wear can be avoided, thereby extending the service life of the cutters. By adjusting the cutter layout in real time, the cutter configuration can be adjusted according to geological changes, so that the shield machine can more flexibly respond to geologically complex construction environments and ensure the stability and efficiency of tunneling. By optimizing the cutter layout through genetic algorithms or particle swarm algorithms, the cutting efficiency is ensured while maximizing the service life of the cutters, and reducing the frequent replacement and maintenance costs caused by excessive wear of the cutters.

[0083] It should be noted that the method also includes:

[0084] The spacing of the tool cutting paths is set with the goal of achieving full concrete cutting.

[0085] Based on the principle of achieving full concrete cutting, the spacing of the tool cutting tracks is accurately set to ensure that each part can be effectively cut, improving cutting efficiency and quality. Setting the spacing of the tool cutting tracks can ensure full concrete cutting, avoid incomplete cutting of some areas, and improve the quality of the tunnel. By optimizing the spacing, the workload of each tool can be balanced, avoiding local overload caused by too many tools working together, thereby increasing the overall service life of the tool.

[0086] It should be noted that the tool arrangement conditions at least include:

[0087] A main leading cutter is arranged on the lower side of the main cutter;

[0088] Auxiliary leading cutters are arranged on the left and right sides of the main cutter.

[0089] This embodiment adopts the concept of multiple rib cutting and the optimization scheme of three-dimensional layout of tools. Specifically, Figure 2 As shown in the figure, if the shell knife is used as the main cutter, the main leading cutter is the advanced shell knife, and the secondary leading cutter is the secondary advanced shell knife. The advanced shell knife is formed by placing a thick steel plate under the original shell knife. The tracks of adjacent advanced shell knives are set to a larger spacing to keep the concrete between the two tracks intact and avoid the concrete protective layer on the pile side from peeling off in pieces. During the initial cutting, the advanced shell knife pre-cuts the steel bars into shorter segments (the first cutting) to ensure structural stability.

[0090] Subsequently, the ordinary large shell knife cuts the shorter steel bar segments for the second time. Even if the steel bar is not completely disconnected, a groove with a spacing of about 8 cm can be formed on it. This pre-cutting process makes it easier to bend or break the steel bar in subsequent processing, which makes it easier to discharge through the screw conveyor, optimizing the discharge process.

[0091] In order to reduce the wear of the advance shell knife when cutting at the forefront, auxiliary advance shell knives are arranged on both sides to form a protective barrier and balance the tool loss.

[0092] In the specific implementation, considering the material conditions and equipment limitations, the steel plate thickness hl was selected as 65mm (about 3 times the diameter of the steel bar) and h2 was selected as 30mm (about half of hl) to ensure cutting efficiency and tool durability. At the same time, according to the limitation of the inner diameter of the screw conveyor of 0.67m, the track spacing L of the leading shell knife was determined to be 64cm, and the track spacing of the secondary leading shell knife was determined to be 48cm, taking into account both cutting effect and mechanical compatibility.

[0093] It is understandable that arranging the main leading cutter under the main cutter and the auxiliary leading cutters on the left and right of the main cutter can improve the cutting accuracy and stability of the tool and effectively improve the cutting efficiency. The arrangement of the auxiliary leading cutter can reduce the burden on the main cutter and improve the cutting load distribution on the cutter disc, thereby improving the uniformity of the cutting process and extending the service life of the tool.

[0094] It should be noted that the method also includes:

[0095] Based on the cutting force distribution function, the tool arrangement follows the cutting force distribution optimization principle.

[0096] The cutting force distribution function is expressed as:

[0097]

[0098] Among them, k is a constant, x is the tool position, s is the tool spacing, h is the tool cutting depth, D is the cutter head diameter, and α is the tool arrangement depth.

[0099] In practice, the tool arrangement that follows the cutting force distribution optimization principle is as follows: Figure 3 As shown:

[0100] The main cutters are evenly distributed in the outer diameter area of ​​the cutter disc, the diameter-protecting main cutter is located near the center of the cutter disc, the leading cutter is arranged in front of the main cutter and is divided into 15 circles, the peripheral cutter protection cutter is arranged at the edge of the cutter disc, the peripheral ring tearing cutter cooperates with the peripheral cutter protection cutter and is arranged along the center of the spoke, the cutter ring protection cutter is arranged around the center of the cutter disc, a larger three-pronged fishtail knife is designed in the center, the wear detection cutter is arranged in a position that is easy to monitor, and the grouting port protection cutter is located around the grouting port of the cutter disc.

[0101] The above arrangement has calculated the number of tools on each track circle of the concentric circle arrangement mode. The concentric circle includes 15 track circles, represented by 1# to 15#. Figure 3 As shown, the guide knife is arranged in front of the main cutter, with 2 guide knives on each circle of 2#~1# circle trajectory, 3 guide knives on each circle of 9#~3# circle trajectory, arranged in 2 layers, and 4 guide knives on each circle of 15#~10# circle trajectory, arranged in 2 layers, about 10-20cm away from the edge of the main cutter, to ensure that the guide knife can pre-treat the rock layer and reduce the cutting burden of the main cutter.

[0102] The peripheral knife protection knife fits tightly to the edge of the cutter disc. The height of the peripheral knife protection knife is arranged in three layers, assuming the height is 160mm, 140mm, and 120mm, and the excavation diameter is 6390mm. Protection knives are added on both sides of the tool with uniform spacing. The outer circle tearing knife and the peripheral knife protection knife are staggered to improve the edge cutting efficiency and protect the edge structure of the cutter disc.

[0103] According to the structure of the center area of ​​the cutter disc, the cutter ring protection knives are evenly distributed to form a protection circle to enhance the overall structural strength of the cutter disc

[0104] The root of the fishtail knife is designed to be conical and arranged in the center of the cutter disc to optimize the cutting trajectory; the wear detection knife is arranged in the easily worn area to monitor the tool status in real time; the grouting port protection knife is close to the grouting port to ensure the safety of the grouting operation area.

[0105] By making the tool layout follow the cutting force distribution optimization principle, it can ensure that the tool distribution meets the cutting force distribution requirements, making the load of each tool more balanced, thereby improving the overall cutting efficiency and tool life. Optimizing the cutting force distribution avoids excessive wear of the tool in a local area, prolongs the tool life, and improves the cutting accuracy and quality.

[0106] It should be noted that the tool life under the current tool arrangement mode is determined in real time, including:

[0107] Real-time detection of tool wear through wear detection knives and multiple sensors;

[0108] According to the tool wear and construction progress, the tool life under the current tool arrangement is determined based on the prediction model.

[0109] During the operation, the shield machine cutter will constantly contact and cut soil or concrete and other geological materials. As time goes by, the cutter will gradually wear out, resulting in a decrease in cutting efficiency, and may even fail at some point. The wear state of the cutter directly affects the efficiency and quality of the construction, as well as the timing of cutter replacement. By real-time monitoring of cutter wear and combining it with the construction progress, it is possible to evaluate the service life of the current cutter configuration, predict the time for cutter replacement in advance, and avoid work interruptions or reduced construction quality due to excessive cutter wear.

[0110] In this technical solution, a series of sensors or wear monitoring devices can be used to detect the wear of the tool during the cutting process. These sensors can include force sensors, vibration sensors, temperature sensors, etc., which can reflect the degree of wear of the tool during operation. Combined with the construction progress (such as progress, operation time, tunnel length, etc.), the service life of the tool is predicted through an algorithm model.

[0111] Force sensor: Installed on the tool or cutterhead, it monitors changes in cutting force in real time. As the tool wears, the cutting force may change, and the sensor can detect these changes.

[0112] Vibration sensor: monitors the vibration of the tool. Severely worn tools usually produce irregular vibration signals, and the vibration sensor can detect this change.

[0113] Temperature sensor: As the tool wears, the friction during cutting increases, which may cause the tool surface temperature to rise. By monitoring the temperature change, the degree of tool wear can be indirectly inferred.

[0114] According to the construction progress information (such as construction progress, working hours, tunnel advancement distance, etc.), combined with wear data, the remaining service life of the tool is predicted through mathematical models (such as linear regression model, neural network model, etc.). The common practice is to deduce the wear rate and expected life of the tool through simulation and calculation based on the known wear curve or historical data.

[0115] By detecting tool wear in real time and predicting tool life in combination with the construction progress, the efficiency and reliability of the construction process can be significantly improved. First, it can prevent the tool from suddenly failing due to excessive wear, thereby reducing downtime and delays caused by tool failure during construction. Second, real-time wear monitoring enables the construction team to replace or adjust the tool in time before it is completely worn out, ensuring the stability of construction quality and progress. Finally, by predicting tool life in combination with the construction progress, the tool maintenance and replacement plan can be accurately arranged, thereby reducing the frequency and related costs of tool maintenance and replacement.

[0116] Furthermore, the method also includes:

[0117] When geological changes occur in the construction area, the tool configuration and layout are adjusted according to the geological changes in the construction area.

[0118] This technical solution enhances the flexibility of the construction method, and can timely adjust the configuration of the tool according to geological changes, so that the construction can better adapt to the complex geological environment and avoid construction difficulties caused by geological changes. Timely adjustment of the tool layout according to geological changes can ensure the stability of the cutting process, reduce the construction risks caused by improper tool configuration, and improve the safety of construction.

[0119] Furthermore, the method also includes:

[0120] Adjust tool configuration and layout according to tool wear and construction progress.

[0121] By combining the construction progress with the tool wear, the tool configuration can be flexibly adjusted to optimize the use of the tool at different stages, thereby improving construction efficiency and tool life. By timely adjusting the tool layout and configuration, premature damage or excessive wear of the tool is avoided, the frequent replacement and maintenance of the tool is reduced, and the tool use cost is reduced.

[0122] Embodiment 2

[0123] A shield cutting pile group cutter head tool arrangement device, referring to Figure 4 ,include:

[0124] Processor 21 and memory 22;

[0125] The processor 21 and the memory 22 are connected via a communication bus:

[0126] The processor 21 is used to call and execute the program stored in the memory 22;

[0127] The memory 22 is used to store a program, and the program is used for at least one of the shield cutting pile group cutter head tool arrangement methods in the above embodiments.

[0128] Equipped with processors and memory, it can realize automatic calculation and optimization of tool placement process, reduce manual intervention, and improve the automation level and accuracy of the construction process. Through sensors, the use of tools can be monitored in real time, and feedback can be given to the processor immediately. The tool configuration can be adjusted according to the feedback results, effectively improving the flexibility and response speed of construction. The construction data and optimization algorithms saved in the memory can provide operators with detailed tool management and placement plans, improve construction efficiency and reduce the occurrence of errors.

[0129] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0130] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0131] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0132] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0133] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0134] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0135] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0136] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0137] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for arranging cutter heads for cutting pile groups in a shield machine, characterized in that: include: Obtain rock formation properties in the construction area; Determine the cutterhead structure according to the rock formation properties; Calculating the cutterhead opening rate according to the rock formation properties; The required number of each type of tool on the cutter disc is calculated based on the total area of ​​the cutter disc, the area requirement coefficient of each type of tool, the distribution area radius of each type of tool, the number of tool distribution areas on the cutter disc, and the weight coefficient of each tool distribution area on the cutter disc; According to the parameters of the cutter head and various types of cutters, the number of cutters on each track circle of the concentric circle arrangement mode is calculated; Determine tool life in real time under current tool arrangement; According to the tool life, the current tool arrangement is optimized by genetic algorithm or particle swarm algorithm; The genetic algorithm or particle swarm algorithm takes ensuring cutting efficiency as a constraint and maximizing tool life as a goal.

2. The method according to claim 1, characterized in that: The cutterhead opening rate is calculated according to the rock formation properties, including: Where ξ represents the cutterhead opening ratio; p0 represents the static lateral earth pressure of the soil; p a represents active earth pressure; c represents soil cohesion; H represents the burial depth of the tunnel center; γ represents the soil bulk density; K0 represents the static lateral pressure coefficient of the soil; K1 represents the soil cohesion correction coefficient; K2 represents the soil friction angle correction coefficient; and L represents the length of the soil chamber.

3. The method according to claim 1, characterized in that The method further comprises: The spacing of the tool cutting paths is set with the goal of achieving full concrete cutting.

4. The method according to claim 1, characterized in that: Tool arrangement conditions include at least: A main leading cutter is arranged on the lower side of the main cutter; Auxiliary leading cutters are arranged on the left and right sides of the main cutter.

5. The method according to claim 1, characterized in that The method further comprises: Based on the cutting force distribution function, the tool arrangement follows the cutting force distribution optimization principle.

6. The method according to claim 1, characterized in that According to the parameters of the cutter head and various types of tools, the number of tools on each track circle of the concentric circle arrangement mode is calculated, including: Among them, N i represents the number of tools on track circle i; D represents the diameter of the cutter head; α represents the tool angle; w c Indicates the average tool width; H m Indicates the average material hardness; Lc indicates the tool length.

7. The method according to claim 1, characterized in that Determine tool life in real time for the current tool arrangement, including: Real-time detection of tool wear through wear detection knives and multiple sensors; According to the tool wear and construction progress, the tool life under the current tool arrangement is determined based on the prediction model.

8. The method according to claim 1, characterized in that The method further comprises: When geological changes occur in the construction area, the tool configuration and layout are adjusted according to the geological changes in the construction area.

9. The method according to claim 7, characterized in that: The method further comprises: Adjust tool configuration and layout according to tool wear and construction progress.

10. A shield cutting pile group cutter head tool arrangement device, characterized in that: include: Processor and memory; The processor and the memory are connected via a communication bus: Wherein, the processor is used to call and execute the program stored in the memory; The memory is used to store a program, and the program is used to execute at least a method for arranging cutter heads for pile group cutting of a shield machine as described in any one of claims 1-9.

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