Method, device and equipment for calculating maximum excavation height of tunnel face and medium

Abstract

The invention relates to the technical field of civil engineering, and discloses a method for calculating the maximum excavation height of a tunnel face, which comprises the following steps of: inquiring the excavation footage and advanced small duct support data of a damage range, and constructing an instability model based on the excavation footage and the advanced small duct support data to obtain a tunnel face instability model; constructing a calculation equation of virtual power of the tunnel face through a limit analysis upper-bound method to obtain a virtual power calculation equation; the external force power and the internal energy consumption of the tunnel face are calculated through the tunnel face instability model and the virtual power calculation equation, and the external force power and the internal energy consumption of the tunnel face are obtained; searching parameters required by the virtual power calculation equation to obtain required parameters; and in the excavation process of the tunnel face, a safety coefficient is set for the virtual power calculation equation, and the maximum excavation height of the tunnel face is calculated based on the required parameters. The invention further provides a device and equipment for calculating the maximum excavation height of the tunnel face and a storage medium. The safety of tunnel construction can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering, and in particular to a calculation method, device, equipment and medium for a maximum excavation height of a tunnel face. Background Art

[0002] In recent years, with the vigorous development of tunnel construction technology, more and more problems have been encountered, especially when encountering soft surrounding rock during tunnel construction. Since the maximum excavation height of the tunnel face is affected by many parameters, if the excavation height of the tunnel face is too small, it will be difficult to carry out construction. If the excavation height of the tunnel is too large, landslides are likely to occur.

[0003] Therefore, a solution is now proposed to address the above technical deficiencies. Summary of the invention

[0004] The present invention provides a calculation method, device, equipment and medium for the maximum excavation height of a tunnel face, the main purpose of which is to improve the safety of tunnel construction.

[0005] To achieve the above object, the present invention provides a method for calculating the maximum excavation height of a tunnel face, comprising:

[0006] Acquire the damage range of the excavated tunnel face, query the excavation footage and advance small pipe support data of the damage range, build an instability model based on the excavation footage and the advance small pipe support data, and obtain the tunnel face instability model;

[0007] The calculation equation of the virtual power of the tunnel face is constructed by the limit analysis upper limit method to obtain the calculation equation of the virtual power;

[0008] The external force power and internal energy consumption of the face are calculated by the face instability model and the virtual power calculation equation to obtain the face external force power and the face internal energy consumption;

[0009] Find the parameters required by the virtual power calculation equation to obtain the required parameters, wherein the required parameters are rock mass cohesion, rock mass friction angle, and tunnel excavation footage;

[0010] During the excavation of the tunnel face, a safety factor is set for the virtual power calculation equation, and the maximum excavation height of the tunnel face is calculated based on the required parameters.

[0011] Optionally, the instability model of the tunnel face includes: the destruction zone above the tunnel face is a cone C, the angle between the fracture surface of cone C and the horizontal plane is, the speed is, and the speed direction is vertically downward; the destruction zone in front of the tunnel face is a logarithmic spiral S, the logarithmic spiral S: speed v, the speed direction is downward along the sliding surface, and the logarithmic spiral equation in the model is:

[0012]

[0013] Among them, r is the variable polar diameter (radius of rotation of the logarithmic spiral), is the internal friction angle of the rock mass, θ is the variable angle, is the angle between the rotation radius and OA, 0≤θ≤π / 2.

[0014] Optionally, the calculating the external force power and internal energy consumption of the tunnel face by using the tunnel face instability model and the virtual power calculation equation to obtain the tunnel face external force power and the tunnel face internal energy consumption includes:

[0015] Acquire a structural dynamic field of the tunnel face, and query rock and soil blocks in the structural dynamic field to obtain a first block and a second block;

[0016] Obtaining block parameters of the first block and the second block, and respectively calculating the external force power of the first block and the second block through the logarithmic spiral in the tunnel face instability model to obtain the external force power of the first block and the external force power of the second block;

[0017] Obtaining velocity discontinuities of the first block and the second block according to the structural maneuvering field, and respectively obtaining internal energy dissipation power of the first block and the second block according to the velocity discontinuities;

[0018] The face external force power and face internal energy consumption are obtained based on the external force power of the first block and the external force power of the second block and the internal energy dissipation power of the first block and the second block.

[0019] Optionally, the calculation equation of the tunnel face virtual power is constructed by the limit analysis upper limit method to obtain the virtual power calculation equation, including:

[0020] By defining the instability mode of the tunnel face, the limit equilibrium state of the tunnel face when in operation is obtained;

[0021] Describing the force field and velocity field of the geological body in the tunnel face according to the limit equilibrium state to obtain the geological body force field and geological body velocity field;

[0022] A calculation equation for virtual power is constructed based on the geological body force field and the geological body velocity field to obtain the virtual power calculation equation.

[0023] Optionally, during the excavation process of the tunnel face, the virtual power calculation equation is set with a safety factor, and the maximum excavation height of the tunnel face is calculated based on the required parameters, including:

[0024] Acquiring engineering specifications, historical engineering data and risk assessment results during the tunnel face excavation process, and setting a safety factor for the virtual power calculation equation according to the engineering specifications, historical engineering data and risk assessment results;

[0025] Based on the required parameters and the safety factor, an optimal solution of the tunnel face instability model is obtained through an optimization algorithm;

[0026] Obtaining an optimization calculation result according to the optimal solution, evaluating the stability of the tunnel face, and adjusting the safety factor according to the evaluation result of the stability;

[0027] Based on the optimization calculation results and the adjusted safety factor, the maximum safe excavation height under the current geological conditions and support parameters is calculated.

[0028] Optionally, setting a safety factor for the virtual power calculation equation according to the engineering specifications, historical engineering data and risk assessment results includes:

[0029] According to the minimum requirements of engineering specifications, the statistical results of historical engineering data and the impact of risk assessment, a preliminary safety factor calculation is performed to obtain the initial safety factor;

[0030] weights are set for the statistical results of the historical engineering data, the minimum requirements of the engineering specifications and the impact of the risk assessment,

[0031] The weight is adjusted, and an adjustment result of the safety factor is obtained according to the adjustment of the weight, thereby obtaining a standard safety factor.

[0032] Optionally, the destruction range above the tunnel face is a cone, and the destruction range in front of the tunnel face is a logarithmic spiral.

[0033] In order to solve the above problems, the present invention further provides a device for calculating the maximum excavation height of a tunnel face, the device comprising:

[0034] A model building module is used to obtain the damage range of the excavated tunnel face, query the excavation footage and advance small pipe support data of the damage range, build an instability model based on the excavation footage and the advance small pipe support data, and obtain the instability model of the tunnel face;

[0035] An equation acquisition module is used to construct a calculation equation for the virtual power of the tunnel face by using a limit analysis upper limit method to obtain a calculation equation for the virtual power;

[0036] A parameter calculation module is used to calculate the external force power and internal energy consumption of the face through the face instability model and the virtual power calculation equation to obtain the external force power and internal energy consumption of the face; find the parameters required by the virtual power calculation equation to obtain the required parameters, wherein the required parameters are rock mass cohesion, rock mass friction angle, and tunnel excavation footage;

[0037] The height calculation module is used to set a safety factor for the virtual power calculation equation during the tunnel face excavation process, and calculate the maximum excavation height of the tunnel face based on the required parameters.

[0038] In order to solve the above problem, the present invention further provides an electronic device, the electronic device comprising:

[0039] at least one processor; and,

[0040] a memory communicatively connected to the at least one processor; wherein,

[0041] The memory stores a computer program executable by the at least one processor. The computer program is executed by the at least one processor so that the at least one processor can execute the method for calculating the maximum excavation height of the tunnel face as described above.

[0042] In order to solve the above problems, the present invention also provides a computer-readable storage medium, including a data storage area and a program storage area, the data storage area stores created data, and the program storage area stores a computer program; wherein, when the computer program is executed by a processor, the calculation method of the maximum excavation height of the tunnel face as described above is implemented.

[0043] The embodiment of the present invention first obtains the damage range of the excavated tunnel face, queries the excavation footage and the advance small duct support data of the damage range, constructs an instability model based on the excavation footage and the advance small duct support data, and obtains the instability model of the face; constructs a calculation equation for the virtual power of the tunnel face by the limit analysis upper limit method, and obtains the virtual power calculation equation; calculates the external force power and internal energy consumption of the face by the face instability model and the virtual power calculation equation, and obtains the external force power of the face and the internal energy consumption of the face; searches for the parameters required by the virtual power calculation equation, and obtains the required parameters; sets a safety factor for the virtual power calculation equation during the excavation of the tunnel face, and calculates the maximum excavation height of the tunnel face based on the required parameters. Therefore, the present invention proposes a method, device, electronic device and computer-readable storage medium for calculating the maximum excavation height of the tunnel face. By building a tunnel face instability model and calculating the external force power and internal energy consumption, the parameters required for the virtual power calculation equation are found, and the required parameters are obtained. Based on the setting of a safety factor for the virtual power calculation equation during the tunnel face excavation process, the maximum excavation height of the tunnel face is calculated, thereby improving the safety of tunnel construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A schematic flow chart of a method for calculating the maximum excavation height of a tunnel face provided by an embodiment of the present invention;

[0045] Figure 2 A schematic diagram of the structure of a tunnel face provided by an embodiment of the present invention;

[0046] Figure 3 A schematic diagram of a module of a device for calculating the maximum excavation height of a tunnel face provided by an embodiment of the present invention;

[0047] Figure 4 A schematic diagram of the internal structure of an electronic device for implementing a method for calculating the maximum excavation height of a tunnel face provided by an embodiment of the present invention.

[0048] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0049] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0050] The embodiment of the present application provides a method for calculating the maximum excavation height of a face. The execution subject of the method for calculating the maximum excavation height of a face includes but is not limited to at least one of the electronic devices such as a server and a terminal that can be configured to execute the method provided in the embodiment of the present application. Among them, the server can be an independent server, or it can be a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content delivery networks (Content Delivery Network, CDN), and big data and artificial intelligence platforms. In other words, the method for calculating the maximum excavation height of a face can be executed by software or hardware installed on a remote device or a server device, and the software can be a blockchain platform. The server includes but is not limited to: a single server, a server cluster, a cloud server or a cloud server cluster, etc.

[0051] Reference Figure 1 FIG. 1 is a flow chart of a method for calculating the maximum excavation height of a tunnel face provided by an embodiment of the present invention. In this embodiment, the method for calculating the maximum excavation height of a tunnel face includes the following steps S1-S5:

[0052] S1. Obtain the damage range of the excavated tunnel face, query the excavation footage and advance small duct support data of the damage range, construct an instability model based on the excavation footage and the advance small duct support data, and obtain the tunnel face instability model.

[0053] The destruction range above the tunnel face is a cone, and the destruction range in front of the tunnel face is a logarithmic spiral.

[0054] In the embodiment of the present invention, the damage range of the tunnel face refers to the area where the rock and soil within a certain range near the tunnel face is damaged or unstable due to factors such as ground stress release, mechanical properties of the rock and soil body itself, and construction disturbance during the tunnel excavation process. The construction of the tunnel face instability model is to predict and evaluate this damage range, so as to take corresponding support measures to ensure construction safety.

[0055] The tunnel face can be limited by geometric shapes to predict areas where instability may occur during excavation, and measures can be taken in advance.

[0056] The destruction range above the tunnel face and the destruction range in front of the tunnel face will be removed according to the equipment adopted. When other equipment is adopted, the destruction range above the tunnel face and the destruction range in front of the tunnel face will change.

[0057] Furthermore, the logarithmic spiral is used in tunnel engineering to describe a self-similar expansion pattern of the damage area in front of the tunnel face, reflecting the complexity that the damage range may grow exponentially as excavation progresses, which helps engineers predict and evaluate tunnel stability, optimize support design, and ensure construction safety.

[0058] In the embodiment of the present invention, the instability model of the tunnel face includes: the destruction zone above the tunnel face is a cone C, the angle between the fracture surface of the cone C and the horizontal plane is, the speed is, and the speed direction is vertically downward; the destruction zone in front of the tunnel face is a logarithmic spiral S, the logarithmic spiral S: speed v, the speed direction is downward along the sliding surface, and the logarithmic spiral equation in the model is:

[0059]

[0060] Among them, r is the variable polar diameter (radius of rotation of the logarithmic spiral), is the internal friction angle of the rock mass, θ is the variable angle, is the angle between the rotation radius and OA, 0≤θ≤π / 2.

[0061] Furthermore, the damage range and accurate prediction of the tunnel face are crucial to the safety of tunnel engineering. By constructing an instability model, we can better understand the mechanism of tunnel face instability and provide a scientific basis for tunnel construction.

[0062] S2. Constructing a calculation equation for the virtual power of the tunnel face by using the upper limit method of limit analysis to obtain a calculation equation for the virtual power.

[0063] In the embodiment of the present invention, the virtual power may also be referred to as virtual work or virtual work displacement, which means that in a geological tunnel environment, when the system is in a state of equilibrium, for any virtual displacement, the sum of the work done by the internal forces of the system is zero.

[0064] Furthermore, the upper limit method of limit analysis is an analysis method used in geotechnical engineering and structural engineering. It is based on the concept of limit equilibrium to evaluate the behavior of a structure or geological body when it reaches its bearing limit. It is suitable for the analysis of engineering problems such as underground structures, slope stability, and foundation bearing capacity.

[0065] Among them, limit equilibrium assumes that the material of a structure or geological body is in a state of complete yield when it reaches its bearing capacity limit. At this time, the stability of the structure is in a critical state.

[0066] Furthermore, the calculation of the virtual power complies with the principle of virtual work, that is, under the limit state, the sum of the products of the internal force of the structure and any virtual displacement is equal to zero.

[0067] In the embodiment of the present invention, the calculation equation of the tunnel face virtual power is constructed by the limit analysis upper limit method to obtain the virtual power calculation equation, including:

[0068] By defining the instability mode of the tunnel face, the limit equilibrium state of the tunnel face when in operation is obtained;

[0069] Describing the force field and velocity field of the geological body in the tunnel face according to the limit equilibrium state, and obtaining the geological body force field and geological body velocity field;

[0070] A calculation equation for virtual power is constructed based on the geological body force field and the geological body velocity field to obtain the virtual power calculation equation.

[0071] It is understood that the force field of the geological body refers to the distribution of forces on each point in the geological body. When working at the tunnel face, the force field includes the initial stress field caused by the ground stress and the stress redistribution caused by the excavation activity. The force field is usually described by the stress tensor, which contains the normal stress and shear stress components.

[0072] Furthermore, the velocity field refers to the distribution of the velocity of each point in the geological body. During tunnel excavation, the velocity field reflects the deformation and movement of the rock and soil body, including the displacement and strain rate of the rock and soil body. The velocity field is usually related to the stress state, material properties and external forces of the geological body.

[0073] S3. Calculate the external force power and internal energy consumption of the tunnel face by using the tunnel face instability model and the virtual power calculation equation to obtain the external force power and internal energy consumption of the tunnel face.

[0074] In the embodiment of the present invention, the external force power generally refers to the power generated by the external force acting on the tunnel face, such as the gravity of the rock block, which reflects the influence of the external force on the stability of the tunnel face.

[0075] Furthermore, the internal energy consumption refers to the energy consumed inside the rock block due to friction, shear and other factors during the tunnel excavation process. The internal energy consumption can effectively reflect the mechanical characteristics and operating status of the rock block.

[0076] Among them, by calculating the external force power and internal energy consumption, the stability of the tunnel face can be evaluated. If the external force power is greater than the internal energy consumption, the tunnel face may become unstable, otherwise it may remain stable.

[0077] In the embodiment of the present invention, the blocks in the tunnel face include the first block (ABD) and the second block (OBC), and the two blocks belong to different parts of the tunnel, so the calculation methods of the external force power and internal energy consumption of the two are also different. The external force power is generally gravity power.

[0078] In the embodiment of the present invention, the external force power and internal energy consumption of the tunnel face are calculated by the tunnel face instability model and the virtual power calculation equation to obtain the tunnel face external force power and the tunnel face internal energy consumption, including:

[0079] Acquire a structural dynamic field of the tunnel face, and query rock and soil blocks in the structural dynamic field to obtain a first block and a second block;

[0080] Obtaining block parameters of the first block and the second block, and respectively calculating the external force power of the first block and the second block through the logarithmic spiral in the tunnel face instability model to obtain the external force power of the first block and the external force power of the second block;

[0081] Obtaining velocity discontinuities of the first block and the second block according to the structural maneuvering field, and respectively obtaining internal energy dissipation power of the first block and the second block according to the velocity discontinuities;

[0082] The face external force power and face internal energy consumption are obtained based on the external force power of the first block and the external force power of the second block and the internal energy dissipation power of the first block and the second block.

[0083] In the embodiment of the present invention, the structural maneuvering field refers to a theoretical framework that simulates and evaluates the mechanical behavior and stability of the tunnel excavation face and its surrounding rock and soil during the construction process in the tunnel face stability analysis, by establishing a theoretical framework that includes elements such as geometric models, mechanical parameters, external and internal force analysis, instability mode simulation, and calculation equation establishment, thereby providing scientific guidance and decision-making basis for tunnel construction.

[0084] In the embodiment of the present invention, the logarithmic spiral is:

[0085]

[0086] Among them, r is the variable polar diameter (radius of rotation of the logarithmic spiral), is the internal friction angle of the rock mass, θ is the variable angle, is the angle between the rotation radius and OA, 0≤θ≤π / 2.

[0087] Furthermore, the external force power of the first block and the second block are calculated respectively through the logarithmic spiral in the tunnel face instability model, and the formulas for obtaining the external force power of the first block and the external force power of the second block are as follows:

[0088]

[0089] Among them, Figure 2 As shown in the figure, h is the tunnel excavation height, L is the excavation footage, O is the starting coordinate of the logarithmic spiral, A, B, C, and D are points on the failure surface, and when the tunnel face is unstable, according to the previous assumption, the vertex angle of the upper failure cone in front of the tunnel face is The isosceles triangle ABD (equivalent to the first block) with a height of H and a base of r0+L on the cone is destroyed. The bisector of its fixed focus remains vertical with a speed of v. a When the rock mass in the tunnel face is destroyed along the logarithmic spiral line BC, the velocity of block OBC (equivalent to the second block) is v b , the friction angle and cohesion of the rock mass are and c.

[0090] Furthermore, the external force power of the first block is:

[0091]

[0092] The external force power of the second block is:

[0093]

[0094] The internal energy dissipation powers of the first block and the second block are respectively:

[0095]

[0096] S4. Find the parameters required by the virtual power calculation equation to obtain the required parameters, wherein the required parameters are rock mass cohesion, rock mass friction angle, and tunnel excavation footage.

[0097] In the embodiment of the present invention, the required parameters are crucial for evaluating the stability of the tunnel face, among which the rock cohesion and friction angle reflect the mechanical properties of geotechnical materials and determine the shear strength of the materials when subjected to shear, while the tunnel excavation footage is related to the construction progress and the exposed area of ​​the tunnel face, affecting the support requirements and the stability of the excavation face.

[0098] Furthermore, the required parameters can provide a scientific basis for setting the safety factor and determining the maximum excavation height.

[0099] S5. Setting a safety factor for the virtual power calculation equation during the tunnel face excavation process, and calculating the maximum excavation height of the tunnel face based on the required parameters.

[0100] In the embodiment of the present invention, the maximum excavation height generally refers to the maximum vertical height or depth allowed for excavation under the premise of ensuring the stability of the tunnel face (i.e., tunnel excavation face). This height is determined after comprehensive consideration of geological conditions, support measures, construction methods, and safety requirements, and is used to guide the excavation depth during the construction process to prevent the face from becoming unstable or collapsing.

[0101] In an embodiment of the present invention, during the tunnel face excavation process, the virtual power calculation equation sets a safety factor, and calculates the maximum excavation height of the tunnel face based on the required parameters, including:

[0102] Acquiring engineering specifications, historical engineering data and risk assessment results during the tunnel face excavation process, and setting a safety factor for the virtual power calculation equation according to the engineering specifications, historical engineering data and risk assessment results;

[0103] Based on the required parameters and the safety factor, an optimal solution of the tunnel face instability model is obtained through an optimization algorithm;

[0104] Obtaining an optimization calculation result according to the optimal solution, evaluating the stability of the tunnel face, and adjusting the safety factor according to the evaluation result of the stability;

[0105] Based on the optimization calculation results and the adjusted safety factor, the maximum safe excavation height under the current geological conditions and support parameters is calculated.

[0106] Furthermore, setting a safety factor for the virtual power calculation equation according to the engineering specifications, historical engineering data and risk assessment results includes:

[0107] According to the minimum requirements of engineering specifications, the statistical results of historical engineering data and the impact of risk assessment, a preliminary safety factor calculation is performed to obtain the initial safety factor;

[0108] weights are set for the statistical results of the historical engineering data, the minimum requirements of the engineering specifications and the impact of the risk assessment,

[0109] The weight is adjusted, and an adjustment result of the safety factor is obtained according to the adjustment of the weight, thereby obtaining a standard safety factor.

[0110] The embodiment of the present invention first obtains the damage range of the excavated tunnel face, queries the excavation footage and the advance small duct support data of the damage range, constructs an instability model based on the excavation footage and the advance small duct support data, and obtains the instability model of the face; constructs a calculation equation for the virtual power of the tunnel face by the limit analysis upper limit method, and obtains the virtual power calculation equation; calculates the external force power and internal energy consumption of the face by the face instability model and the virtual power calculation equation, and obtains the external force power of the face and the internal energy consumption of the face; searches for the parameters required by the virtual power calculation equation, and obtains the required parameters; sets a safety factor for the virtual power calculation equation during the excavation of the tunnel face, and calculates the maximum excavation height of the tunnel face based on the required parameters. Therefore, the present invention proposes a method, device, electronic device and computer-readable storage medium for calculating the maximum excavation height of the tunnel face. By building a tunnel face instability model and calculating the external force power and internal energy consumption, the parameters required for the virtual power calculation equation are found, and the required parameters are obtained. Based on the setting of a safety factor for the virtual power calculation equation during the tunnel face excavation process, the maximum excavation height of the tunnel face is calculated, thereby improving the safety of tunnel construction.

[0111] like Figure 3 The figure is a schematic diagram of a module of a device for calculating the maximum excavation height of a tunnel face according to the present invention.

[0112] The calculation device 100 for the maximum excavation height of the tunnel face of the present invention can be installed in an electronic device. According to the functions to be implemented, the calculation device for the maximum excavation height of the tunnel face can include a model building module 101, an equation acquisition module 102, a parameter calculation module 103 and a height calculation module 104. The module of the present invention can also be called a unit, which refers to a series of computer program segments that can be executed by a processor of an electronic device and can complete fixed functions, which are stored in the memory of the electronic device.

[0113] In this embodiment, the functions of each module / unit are as follows:

[0114] The model building module 101 is used to obtain the damage range of the excavated tunnel face, query the excavation footage and the advance small pipe support data of the damage range, build an instability model based on the excavation footage and the advance small pipe support data, and obtain the instability model of the tunnel face;

[0115] An equation acquisition module 102 is used to construct a calculation equation for the virtual power of the tunnel face by using a limit analysis upper limit method to obtain a calculation equation for the virtual power;

[0116] The parameter calculation module 103 is used to calculate the external force power and internal energy consumption of the tunnel face through the tunnel face instability model and the virtual power calculation equation to obtain the tunnel face external force power and the tunnel face internal energy consumption; find the parameters required by the virtual power calculation equation to obtain the required parameters, wherein the required parameters are rock mass cohesion, rock mass friction angle, and tunnel excavation footage;

[0117] The height calculation module 104 is used to set a safety factor for the virtual power calculation equation during the tunnel face excavation process, and calculate the maximum excavation height of the tunnel face based on the required parameters.

[0118] In detail, each module in the device 100 for calculating the maximum excavation height of the tunnel face in the embodiment of the present invention is used in the same manner as described above. Figure 1 The calculation method of the maximum excavation height of the tunnel face is the same technical means and can produce the same technical effect, so it will not be repeated here.

[0119] like Figure 4 , which is a schematic diagram of the structure of an electronic device for realizing the calculation method of the maximum excavation height of the tunnel face according to the present invention.

[0120] The electronic device may include a processor 10, a memory 11, a communication bus 12 and a communication interface 13, and may also include a computer program stored in the memory 11 and executable on the processor 10, such as a calculation program for the maximum excavation height of the tunnel face.

[0121] In some embodiments, the processor 10 may be composed of an integrated circuit, for example, a single packaged integrated circuit, or a plurality of packaged integrated circuits with the same or different functions, including one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and combinations of various control chips, etc. The processor 10 is the control core (ControlUnit) of the electronic device, and uses various interfaces and lines to connect various components of the entire electronic device, and executes or executes programs or modules stored in the memory 11 (for example, a calculation program for executing the maximum excavation height of the tunnel face, etc.), and calls data stored in the memory 11 to execute various functions of the electronic device and process data.

[0122] The memory 11 includes at least one type of readable storage medium, and the readable storage medium includes a flash memory, a mobile hard disk, a multimedia card, a card-type memory (for example, an SD or DX memory, etc.), a magnetic memory, a disk, an optical disk, etc. In some embodiments, the memory 11 may be an internal storage unit of an electronic device, such as a mobile hard disk of the electronic device. In other embodiments, the memory 11 may also be an external storage device of an electronic device, such as a plug-in mobile hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the electronic device. Further, the memory 11 may also include both an internal storage unit of the electronic device and an external storage device. The memory 11 can not only be used to store application software and various types of data installed in the electronic device, such as the code of the calculation program of the maximum excavation height of the face, but also be used to temporarily store data that has been output or is to be output.

[0123] The communication bus 12 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. The bus is configured to realize connection and communication between the memory 11 and at least one processor 10, etc.

[0124] The communication interface 13 is used for communication between the above-mentioned electronic device and other devices, including a network interface and a user interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), which is generally used to establish a communication connection between the electronic device and other electronic devices. The user interface may be a display (Display), an input unit (such as a keyboard (Keyboard)), and optionally, the user interface may also be a standard wired interface, a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, and an OLED (Organic Light-Emitting Diode, organic light-emitting diode) touch device, etc. Among them, the display may also be appropriately referred to as a display screen or a display unit, which is used to display information processed in the electronic device and to display a visual user interface.

[0125] Figure 4 Only an electronic device with components is shown, and those skilled in the art will understand that Figure 4 The structure shown does not constitute a limitation on the electronic device, and may include fewer or more components than shown in the figure, or combine certain components, or arrange the components differently.

[0126] For example, although not shown, the electronic device may also include a power source (such as a battery) for supplying power to each component. Preferably, the power source may be logically connected to the at least one processor 10 through a power management device, so that the power management device can realize functions such as charging management, discharging management, and power consumption management. The power source may also include one or more DC or AC power sources, recharging devices, power failure detection circuits, power converters or inverters, power status indicators, and other arbitrary components. The electronic device may also include a variety of sensors, Bluetooth modules, Wi-Fi modules, etc., which will not be repeated here.

[0127] It should be understood that the embodiment is for illustration only and the scope of the patent application is not limited to this structure.

[0128] The calculation program for the maximum excavation height of the tunnel face stored in the memory 11 of the electronic device is a combination of multiple computer programs. When running in the processor 10, the following can be achieved:

[0129] Acquire the damage range of the excavated tunnel face, query the excavation footage and advance small pipe support data of the damage range, build an instability model based on the excavation footage and the advance small pipe support data, and obtain the tunnel face instability model;

[0130] The calculation equation of the virtual power of the tunnel face is constructed by the limit analysis upper limit method to obtain the calculation equation of the virtual power;

[0131] The external force power and internal energy consumption of the face are calculated by the face instability model and the virtual power calculation equation to obtain the face external force power and the face internal energy consumption;

[0132] Find the parameters required by the virtual power calculation equation to obtain the required parameters, wherein the required parameters are rock mass cohesion, rock mass friction angle, and tunnel excavation footage;

[0133] During the excavation of the tunnel face, a safety factor is set for the virtual power calculation equation, and the maximum excavation height of the tunnel face is calculated based on the required parameters.

[0134] Specifically, the specific implementation method of the processor 10 for the above-mentioned computer program can refer to Figure 1 The description of the relevant steps in the corresponding embodiments will not be repeated here.

[0135] Furthermore, if the module / unit integrated in the electronic device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a non-volatile computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile. For example, the computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, and a read-only memory (ROM).

[0136] The present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor of an electronic device, the computer program can implement:

[0137] Acquire the damage range of the excavated tunnel face, query the excavation footage and advance small pipe support data of the damage range, build an instability model based on the excavation footage and the advance small pipe support data, and obtain the tunnel face instability model;

[0138] The calculation equation of the virtual power of the tunnel face is constructed by the limit analysis upper limit method to obtain the calculation equation of the virtual power;

[0139] The external force power and internal energy consumption of the face are calculated by the face instability model and the virtual power calculation equation to obtain the face external force power and the face internal energy consumption;

[0140] Find the parameters required by the virtual power calculation equation to obtain the required parameters, wherein the required parameters are rock mass cohesion, rock mass friction angle, and tunnel excavation footage;

[0141] During the excavation of the tunnel face, a safety factor is set for the virtual power calculation equation, and the maximum excavation height of the tunnel face is calculated based on the required parameters.

[0142] In the several embodiments provided by the present invention, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the modules is only a logical function division, and there may be other division methods in actual implementation.

[0143] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0144] In addition, each functional module in each embodiment of the present invention may be integrated into one processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional modules.

[0145] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0146] Therefore, no matter from which point of view, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is limited by the appended claims rather than the above description, so it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any attached figure mark in the claims should not be regarded as limiting the claims involved.

[0147] The blockchain referred to in this invention is a new application mode of computer technologies such as distributed data storage, peer-to-peer transmission, consensus mechanism, encryption algorithm, etc. Blockchain is essentially a decentralized database, a string of data blocks generated by cryptographic methods. Each data block contains a batch of network transaction information, which is used to verify the validity of its information (anti-counterfeiting) and generate the next block. Blockchain can include the underlying blockchain platform, platform product service layer, and application service layer.

[0148] The embodiments of the present application can acquire and process relevant data based on artificial intelligence technology. Among them, artificial intelligence (AI) is the theory, method, technology and application system that uses digital computers or machines controlled by digital computers to simulate, extend and expand human intelligence, perceive the environment, acquire knowledge and use knowledge to obtain the best results.

[0149] In addition, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in the system claim can also be implemented by one unit or device through software or hardware. The second and other words are used to indicate names, but not to indicate any particular order.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for calculating the maximum excavation height of a tunnel face, characterized in that: The method comprises: Acquire the damage range of the excavated tunnel face, query the excavation footage and advance small pipe support data of the damage range, build an instability model based on the excavation footage and the advance small pipe support data, and obtain the tunnel face instability model; The calculation equation of the virtual power of the tunnel face is constructed by the limit analysis upper limit method to obtain the calculation equation of the virtual power; The external force power and internal energy consumption of the face are calculated by the face instability model and the virtual power calculation equation to obtain the face external force power and the face internal energy consumption; Find the parameters required by the virtual power calculation equation to obtain the required parameters, wherein the required parameters are rock mass cohesion, rock mass friction angle, and tunnel excavation footage; During the excavation of the tunnel face, a safety factor is set for the virtual power calculation equation, and the maximum excavation height of the tunnel face is calculated based on the required parameters.

2. The method for calculating the maximum excavation height of the tunnel face according to claim 1, characterized in that: The instability model of the tunnel face includes: the destruction zone above the tunnel face is a cone C, the angle between the fracture surface of cone C and the horizontal plane is, the speed is, and the speed direction is vertically downward; the destruction zone in front of the tunnel face is a logarithmic spiral S, the logarithmic spiral S: speed v, the speed direction is downward along the sliding surface, and the logarithmic spiral equation in the model is: Among them, r is the variable polar diameter (radius of rotation of the logarithmic spiral), is the friction angle in the rock mass, θ is the variable angle, is the angle between the rotation radius and OA, 0≤θ≤ π / 2.

3. The method for calculating the maximum excavation height of a tunnel face according to claim 1, characterized in that: The step of calculating the external force power and internal energy consumption of the face through the face instability model and the virtual power calculation equation to obtain the face external force power and the face internal energy consumption includes: Acquire a structural dynamic field of the tunnel face, and query rock and soil blocks in the structural dynamic field to obtain a first block and a second block; Obtaining block parameters of the first block and the second block, and respectively calculating the external force power of the first block and the second block through the logarithmic spiral in the tunnel face instability model to obtain the external force power of the first block and the external force power of the second block; Obtaining velocity discontinuities of the first block and the second block according to the structural maneuvering field, and respectively obtaining internal energy dissipation power of the first block and the second block according to the velocity discontinuities; The face external force power and face internal energy consumption are obtained based on the external force power of the first block and the external force power of the second block and the internal energy dissipation power of the first block and the second block.

4. The method for calculating the maximum excavation height of a tunnel face according to claim 1, characterized in that: The calculation equation of the virtual power of the tunnel face is constructed by the limit analysis upper limit method to obtain the virtual power calculation equation, including: By defining the instability mode of the tunnel face, the limit equilibrium state of the tunnel face when in operation is obtained; Describing the force field and velocity field of the geological body in the tunnel face according to the limit equilibrium state, and obtaining the geological body force field and geological body velocity field; A calculation equation for virtual power is constructed based on the geological body force field and the geological body velocity field to obtain the virtual power calculation equation.

5. The method for calculating the maximum excavation height of a tunnel face according to claim 1, characterized in that: The step of setting a safety factor for the virtual power calculation equation during the tunnel face excavation process and calculating the maximum excavation height of the tunnel face based on the required parameters includes: Acquiring engineering specifications, historical engineering data and risk assessment results during the tunnel face excavation process, and setting a safety factor for the virtual power calculation equation according to the engineering specifications, historical engineering data and risk assessment results; Based on the required parameters and the safety factor, an optimal solution of the tunnel face instability model is obtained through an optimization algorithm; Obtaining an optimization calculation result according to the optimal solution, evaluating the stability of the tunnel face, and adjusting the safety factor according to the evaluation result of the stability; Based on the optimization calculation results and the adjusted safety factor, the maximum safe excavation height under the current geological conditions and support parameters is calculated.

6. The method for calculating the maximum excavation height of the tunnel face according to claim 5, characterized in that: The step of setting a safety factor for the virtual power calculation equation according to the engineering specifications, historical engineering data and risk assessment results includes: According to the minimum requirements of engineering specifications, the statistical results of historical engineering data and the impact of risk assessment, a preliminary safety factor calculation is performed to obtain the initial safety factor; weights are set for the statistical results of the historical engineering data, the minimum requirements of the engineering specifications and the impact of the risk assessment, The weight is adjusted, and an adjustment result of the safety factor is obtained according to the adjustment of the weight, thereby obtaining a standard safety factor.

7. The method for calculating the maximum excavation height of a tunnel face according to any one of claims 1 to 6, characterized in that: The destruction range above the tunnel face is a cone, and the destruction range in front of the tunnel face is a logarithmic spiral.

8. A device for calculating the maximum excavation height of a tunnel face, characterized in that: The device comprises: A model building module is used to obtain the damage range of the excavated tunnel face, query the excavation footage and advance small pipe support data of the damage range, build an instability model based on the excavation footage and the advance small pipe support data, and obtain the instability model of the tunnel face; An equation acquisition module is used to construct a calculation equation for the virtual power of the tunnel face by using a limit analysis upper limit method to obtain a calculation equation for the virtual power; A parameter calculation module is used to calculate the external force power and internal energy consumption of the face through the face instability model and the virtual power calculation equation to obtain the external force power and internal energy consumption of the face; find the parameters required by the virtual power calculation equation to obtain the required parameters, wherein the required parameters are rock mass cohesion, rock mass friction angle, and tunnel excavation footage; The height calculation module is used to set a safety factor for the virtual power calculation equation during the tunnel face excavation process, and calculate the maximum excavation height of the tunnel face based on the required parameters.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and, a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the method for calculating the maximum excavation height of a tunnel face according to any one of claims 1 to 7.

10. A computer-readable storage medium, comprising a data storage area and a program storage area, wherein the data storage area stores created data and the program storage area stores a computer program; wherein: When the computer program is executed by a processor, the method for calculating the maximum excavation height of a tunnel face according to any one of claims 1 to 7 is implemented.

Images