Method, device and equipment for determining safety coefficient of stability of tunnel face and medium

Abstract

The invention relates to the technical field of civil engineering, and discloses a tunnel face stability safety coefficient determination method, which comprises the following steps of: constructing a tunnel face instability model based on a preset logarithmic spiral block body and a cone at the upper part in a tunnel face; obtaining an initial virtual power calculation equation, and setting an initial loss coefficient for the initial virtual power calculation equation to obtain an adjusted virtual power calculation equation; querying required parameters, and calculating tunnel face external force power and tunnel face internal energy consumption based on the tunnel face instability model and the required parameters; the required parameters, the tunnel face external force power and the tunnel face internal energy consumption are substituted into the adjustment virtual power calculation equation, the stability safety coefficient is calculated, and the initial safety coefficient is obtained; and judging whether the tunnel face is stable or not according to the initial safety coefficient, and obtaining the stability safety coefficient of the tunnel face when the tunnel face is stable. The invention further provides a tunnel face stability safety coefficient determining device and equipment and a storage medium. The safety and efficiency 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 method, device, equipment and medium for determining a safety factor of tunnel face stability. Background Art

[0002] In recent years, with the vigorous development of tunnel construction technology, more and more problems have been encountered. Face instability may lead to serious safety accidents and economic losses during tunnel excavation. This has always been a problem that needs to be urgently solved in the construction of modern transportation underground projects at home and abroad.

[0003] This problem can be effectively avoided during the construction process by calculating the stability of the tunnel face and constantly adjusting the existing project progress. However, since the safety factor of the tunnel face stability is difficult to determine, tunnel face instability is prone to occur. If the excavation height of the tunnel face is too small, it will lead to problems such as slow excavation efficiency.

[0004] Therefore, a solution is now proposed to address the above technical deficiencies. Summary of the invention

[0005] The present invention provides a method, device, equipment and medium for determining the safety factor of tunnel face stability, the main purpose of which is to improve the safety and efficiency of tunnel construction.

[0006] To achieve the above object, the present invention provides a method for determining the safety factor of a tunnel face stability, comprising:

[0007] The instability model of the tunnel face is constructed based on the preset logarithmic spiral block and the upper cone in the tunnel face, and the instability model of the tunnel face is obtained;

[0008] Obtaining an initial virtual power calculation equation, and obtaining an adjusted virtual power calculation equation by setting an initial loss coefficient for the initial virtual power calculation equation;

[0009] Querying the parameters required for adjusting the virtual power calculation equation to obtain the required parameters, and calculating the external force power and internal energy consumption of the face based on the face instability model and the required parameters to obtain the face external force power and the face internal energy consumption;

[0010] Substituting the required parameters, the external force power of the face and the internal energy consumption of the face into the adjusted virtual power calculation equation, calculating the stability safety factor, and obtaining the initial safety factor;

[0011] Whether the tunnel face is stable is judged by the initial safety factor, and the tunnel face stability safety factor is obtained when the tunnel face is stable.

[0012] Optionally, the constructing of the instability model based on the preset logarithmic spiral block and the upper cone in the tunnel face to obtain the tunnel face instability model includes:

[0013] Obtaining the rotation radius of the logarithmic spiral block and the friction angle of the rock mass in the tunnel;

[0014] Obtain the physical and mechanical parameters of the cone above the tunnel face;

[0015] An original tunnel face instability model is constructed according to the rotation radius of the logarithmic spiral block, the friction angle of the rock mass in the tunnel, and the physical and mechanical parameters of the cone above the tunnel face;

[0016] The original tunnel face instability model is adjusted by querying the tunnel face excavation footage and the advanced small pipe support parameters to obtain the tunnel face instability model.

[0017] Optionally, the calculating the external force power and internal energy consumption of the tunnel face based on the tunnel face instability model and the required parameters to obtain the tunnel face external force power and the tunnel face internal energy consumption includes:

[0018] 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;

[0019] Obtaining the block parameters of the first block and the second block through the required parameters, and calculating the external force power of the first block and the second block respectively 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;

[0020] 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;

[0021] 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.

[0022] Optionally, the step of substituting the required parameters, the external force power of the face and the internal energy consumption of the face into the adjusted virtual power calculation equation, calculating the stability safety factor and obtaining the initial safety factor comprises:

[0023] Calculating the energy dissipation rate of the leading small duct on the velocity discontinuity surface of the tunnel face based on the required parameters to obtain the duct energy dissipation rate;

[0024] The objective function is constructed by using the external force power of the face, the internal energy consumption of the face and the energy dissipation rate of the conduit, and the initial safety factor is obtained by calculation.

[0025] Optionally, judging whether the tunnel face is stable by using the initial safety factor and obtaining a tunnel face stability safety factor when the tunnel face is stable includes:

[0026] Whether the tunnel face is stable is determined by the initial safety factor:

[0027] When the tunnel face is stable, the loss coefficient of the adjusted virtual power calculation equation is increased, and the parameters required for the adjusted virtual power calculation equation are returned to be queried to obtain the required parameters, and the external force power and internal energy consumption of the tunnel face are calculated based on the tunnel face instability model and the required parameters to obtain the tunnel face external force power and the tunnel face internal energy consumption;

[0028] When the tunnel face is unstable, the tunnel face stability safety factor is obtained according to the initial safety factor.

[0029] Optionally, the logarithmic spiral is:

[0030]

[0031] 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.

[0032] Optionally, the initial depreciation coefficient is 1.

[0033] In order to solve the above problems, the present invention further provides a device for determining the safety factor of a tunnel face stability, the device comprising:

[0034] A model building module is used to build an instability model based on a preset logarithmic spiral block and an upper cone in the tunnel face to obtain an instability model of the tunnel face;

[0035] An equation adjustment module is used to obtain an initial virtual power calculation equation, and obtain an adjusted virtual power calculation equation by setting an initial loss coefficient for the initial virtual power calculation equation;

[0036] An energy consumption calculation module is used to query the parameters required for adjusting the virtual power calculation equation, obtain the required parameters, and calculate the external force power and internal energy consumption of the face based on the face instability model and the required parameters to obtain the face external force power and face internal energy consumption;

[0037] The safety factor determination module is used to substitute the required parameters, the external force power of the tunnel face and the internal energy consumption of the tunnel face into the adjusted virtual power calculation equation, calculate the stability safety factor, and obtain the initial safety factor; judge whether the tunnel face is stable according to the initial safety factor, and obtain the tunnel face stability safety factor when the tunnel face is stable.

[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, and the computer program is executed by the at least one processor so that the at least one processor can execute the method for determining the safety factor of tunnel face stability 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 method for determining the safety factor of the stability of the tunnel face as described above is implemented.

[0043] The embodiment of the present invention constructs an instability model based on a preset logarithmic spiral block and an upper cone in the tunnel face, obtains the tunnel face instability model, realizes the construction of the instability model, obtains the initial virtual power calculation equation, and obtains the adjusted virtual power calculation equation by setting the initial loss coefficient for the initial virtual power calculation equation. Then, the parameters required for the adjusted virtual power calculation equation are queried to obtain the required parameters, and the external force power and internal energy consumption of the tunnel face are calculated based on the tunnel face instability model and the required parameters to obtain the external force power of the tunnel face and the internal energy consumption of the tunnel face, thereby achieving the purpose of calculating various energy consumptions. Then, the required parameters, the external force power of the tunnel face and the internal energy consumption of the tunnel face are substituted into the adjusted virtual power calculation equation to calculate the stability safety factor to obtain the initial safety factor. Finally, whether the tunnel face is stable is judged by the initial safety factor, and the tunnel face stability safety factor when the tunnel tunnel face is stable is obtained. Therefore, the method, device, electronic device and computer-readable storage medium for determining the stability safety factor of the tunnel face proposed in the present invention solve the problem that the stability safety factor of the tunnel face is difficult to determine under the conditions of soft and broken surrounding rock, by establishing an instability and failure model of the tunnel excavation face, calculating the external force power and internal energy consumption, and substituting them into the virtual power equation, thereby improving the safety and efficiency of tunnel construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1A schematic flow chart of a method for determining a safety factor of a tunnel face stability 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 determining a safety factor of a tunnel face stability 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 determining a safety factor of tunnel face stability 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 determining the safety factor of palm face stability. The execution subject of the method for determining the safety factor of palm face stability 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 determining the safety factor of palm face stability 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 determining a safety factor of tunnel face stability provided by an embodiment of the present invention. In this embodiment, the method for determining a safety factor of tunnel face stability includes the following steps S1-S5:

[0052] S1. An instability model is constructed based on the preset logarithmic spiral block and the upper cone in the tunnel face to obtain the tunnel face instability model.

[0053] In the embodiment of the present invention, the logarithmic spiral block refers to a geometric model used in the instability failure model of the tunnel excavation face, which uses a logarithmic spiral to describe the geometric shape and mechanical characteristics of the rock mass. This model considers parameters such as the internal friction angle and rotation radius of the rock mass, and predicts the instability phenomenon that may occur during the tunnel excavation process by calculating the gravity power and internal energy dissipation rate of the rock block.

[0054] Furthermore, the upper cone in the tunnel face refers to a theoretical geometric body formed on the tunnel excavation surface, which is usually used in stability analysis to simulate the area where the rock and soil above the tunnel excavation surface may become unstable. It is used to evaluate the stability of the rock and soil above the tunnel excavation surface under the action of gravity and other external forces.

[0055] The instability model is a series of mathematical and physical models used to evaluate and predict unstable phenomena such as landslides and collapses that may occur in soil or rock masses under the influence of natural or human factors. It is based on different theories and methods, such as limit equilibrium theory, finite element analysis, statistical methods, etc., to help engineers take appropriate measures in design and construction to ensure the stability and safety of engineering structures.

[0056] In the embodiment of the present invention, the instability model is constructed based on the preset logarithmic spiral block and the upper cone in the tunnel face to obtain the tunnel face instability model, including:

[0057] Obtaining the rotation radius of the logarithmic spiral block and the friction angle of the rock mass in the tunnel;

[0058] Obtain the physical and mechanical parameters of the cone above the tunnel face;

[0059] An original tunnel face instability model is constructed according to the rotation radius of the logarithmic spiral block, the friction angle of the rock mass in the tunnel, and the physical and mechanical parameters of the cone above the tunnel face;

[0060] The original tunnel face instability model is adjusted by querying the tunnel face excavation footage and the advanced small pipe support parameters to obtain the tunnel face instability model.

[0061] In the embodiment of the present invention, the excavation footage refers to the distance advanced by each excavation operation during tunnel construction, which is related to the construction progress and the selection of construction methods. Reasonable excavation footage can balance the construction speed and the stability of the surrounding rock, and prevent the surrounding rock from becoming unstable due to over-fast excavation.

[0062] Furthermore, the small pipe support is a commonly used tunnel support technology, which is to drill holes around the tunnel face and insert slender steel pipes, and then inject grout into the pipes to enhance the stability and bearing capacity of the surrounding rock. The small pipe support can effectively control the deformation and crack development of the surrounding rock and improve the safety of the tunnel face.

[0063] S2. Obtain an initial virtual power calculation equation, and obtain an adjusted virtual power calculation equation by setting an initial loss coefficient for the initial virtual power calculation equation.

[0064] In an embodiment of the present invention, the virtual power calculation equation is a mathematical tool used to evaluate the stability of the tunnel face in tunnel engineering. By calculating the external force power and internal energy dissipation rate of the rock block, it is predicted whether the tunnel excavation face will become unstable. This method uses the upper limit method of limit analysis to integrate the power of external force and internal energy into an objective function, thereby judging the stability of the tunnel face and determining the required safety factor accordingly. When the calculation results show that the face may become unstable, the design can be optimized by adjusting the reduction factor and recalculating to ensure construction safety.

[0065] Furthermore, the reduction coefficient is a coefficient used to adjust certain parameters in the calculation model to ensure the stability of tunnel excavation. The initial reduction coefficient is a parameter used in the stability analysis of a tunnel excavation face. The initial reduction coefficient is a coefficient used to adjust certain parameters in the calculation model in order to take into account potential uncertainties and risks when calculating the safety factor of the stability of the tunnel face.

[0066] In the embodiment of the present invention, the initial loss coefficient is generally assumed to be 1.

[0067] S3. Query the parameters required for adjusting the virtual power calculation equation to obtain the required parameters, and calculate the external force power and internal energy consumption of the tunnel face based on the tunnel face instability model and the required parameters to obtain the tunnel face external force power and the tunnel face internal energy consumption.

[0068] In the embodiment of the present invention, the required parameters include parameters related to determining external force power and internal energy and internal consumption to ensure that the virtual power equation can accurately reflect the actual situation of the tunnel excavation surface. These parameters are key input values ​​for stability analysis, and they directly affect the accuracy and reliability of the calculation results. They include but are not limited to the physical properties of rock blocks, the mechanical properties of rock and soil, the geometric dimensions of the tunnel excavation surface, the parameters of the advance small guide tube, etc.

[0069] Among them, the mechanical properties of rock and soil include internal friction angle, cohesion, etc. These parameters are crucial for calculating internal energy and internal friction.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] Further, the calculating the external force power and internal energy consumption of the tunnel face based on the tunnel face instability model and the required parameters to obtain the tunnel face external force power and the tunnel face internal energy consumption includes:

[0075] 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;

[0076] Obtaining the block parameters of the first block and the second block through the required parameters, and calculating the external force power of the first block and the second block respectively 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;

[0077] 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;

[0078] 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.

[0079] 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.

[0080] In the embodiment of the present invention, the logarithmic spiral is:

[0081]

[0082] 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.

[0083] 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:

[0084]

[0085] 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 height of the destruction cone is H, and the base is r 0 +L isosceles triangle ABD (equivalent to the first block), its fixed focus bisector 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.

[0086] Furthermore, the external force power of the first block is:

[0087]

[0088] The external force power of the second block is:

[0089]

[0090] The internal energy dissipation powers of the first block and the second block are respectively:

[0091]

[0092] S4. Substituting the required parameters, the external force power of the face and the internal energy consumption of the face into the adjusted virtual power calculation equation, calculating the stability safety factor, and obtaining the initial safety factor.

[0093] In the embodiment of the present invention, the stability safety factor of the face refers to a quantitative indicator for evaluating the ability of the face (i.e., the tunnel excavation face) to maintain stability under specific geological and construction conditions in a tunnel or underground project. It comprehensively considers factors such as the physical and mechanical properties of the rock and soil mass, the geometric shape of the excavation face, the construction method, and support measures. A numerical value that reflects the safety of the face against instability is obtained through calculation, and is usually used to guide construction design and ensure construction safety.

[0094] Furthermore, the required parameters, the external force power of the face and the internal energy consumption of the face are substituted into the adjusted virtual power calculation equation to calculate the stability safety factor and obtain the initial safety factor, including:

[0095] Calculating the energy dissipation rate of the leading small duct on the velocity discontinuity surface of the tunnel face based on the required parameters to obtain the duct energy dissipation rate;

[0096] The objective function is constructed by using the external force power of the face, the internal energy consumption of the face and the energy dissipation rate of the conduit, and the initial safety factor is obtained by calculation.

[0097] In the embodiment of the present invention, the objective function is:

[0098]

[0099] Wherein, μ is the initial safety factor, is the catheter energy dissipation rate.

[0100] Furthermore, the energy dissipation rate of the grouting tube on the velocity discontinuities AD and AB is = is equal to the sum of the energy dissipation rates of the steel and concrete in the grouting pipe, and the energy dissipation rates of the steel and concrete in the grouting pipe on the velocity discontinuity are equal to the product of their respective shear strength, fracture surface length, and velocity. The velocity direction along the velocity discontinuity is the same as the velocity direction v of the block above the advance support. a The angle is φ, which is v a cosφ, the effect of the external insertion angle of the leading small pipe is ignored here. Assume that the inner diameter and outer diameter of a single grouting small pipe are A h , A g , l h , l g Available h ,d g The calculation formula is as follows:

[0101]

[0102]

[0103] Where n is the number of small tubes passing through a unit length; A h is the area of ​​concrete; A g is the area of ​​the steel; l h is the length of the concrete along the shear plane; l g is the length of the steel along the shear plane, [τ] h is the allowable shear strength of concrete; [τ] g It is the allowable shear strength of steel.

[0104] S5. Determine whether the tunnel face is stable by using the initial safety factor, and obtain a tunnel face stability safety factor when the tunnel face is stable.

[0105] In the embodiment of the present invention, judging whether the tunnel face is stable by using the initial safety factor and obtaining the tunnel face stability safety factor when the tunnel face is stable includes:

[0106] Whether the tunnel face is stable is determined by the initial safety factor:

[0107] When the tunnel face is stable, the loss factor of the adjustment virtual power calculation equation is increased, and the process returns to S3;

[0108] When the tunnel face is unstable, the tunnel face stability safety factor is obtained according to the initial safety factor.

[0109] In the embodiment of the present invention, in the step of increasing the loss coefficient of the adjusted virtual power calculation equation and returning to S3, the loss coefficient is generally increased by 0.1 at a time.

[0110] Furthermore, obtaining the tunnel face stability safety factor according to the initial safety factor is obtained by reducing the initial safety factor by a preset threshold value.

[0111] The embodiment of the present invention constructs an instability model based on a preset logarithmic spiral block and an upper cone in the tunnel face, obtains the tunnel face instability model, realizes the construction of the instability model, obtains the initial virtual power calculation equation, and obtains the adjusted virtual power calculation equation by setting the initial loss coefficient for the initial virtual power calculation equation. Then, the parameters required for the adjusted virtual power calculation equation are queried to obtain the required parameters, and the external force power and internal energy consumption of the tunnel face are calculated based on the tunnel face instability model and the required parameters to obtain the external force power of the tunnel face and the internal energy consumption of the tunnel face, thereby achieving the purpose of calculating various energy consumptions. Then, the required parameters, the external force power of the tunnel face and the internal energy consumption of the tunnel face are substituted into the adjusted virtual power calculation equation to calculate the stability safety factor to obtain the initial safety factor. Finally, whether the tunnel face is stable is judged by the initial safety factor, and the tunnel face stability safety factor when the tunnel tunnel face is stable is obtained. Therefore, the method, device, electronic device and computer-readable storage medium for determining the stability safety factor of the tunnel face proposed in the present invention solve the problem that the stability safety factor of the tunnel face is difficult to determine under the conditions of soft and broken surrounding rock, by establishing an instability and failure model of the tunnel excavation face, calculating the external force power and internal energy consumption, and substituting them into the virtual power equation, thereby improving the safety and efficiency of tunnel construction.

[0112] like Figure 3 The figure shows a module schematic diagram of the device for determining the safety factor of the tunnel face stability according to the present invention.

[0113] The device 100 for determining the safety factor of the stability of a tunnel face of the present invention can be installed in an electronic device. According to the functions to be implemented, the device for determining the safety factor of the stability of a tunnel face can include a model building module 101, an equation adjustment module 102, an energy consumption calculation module 103 and a safety factor determination module 104. The module of the present invention can also be referred to as 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, and is stored in the memory of the electronic device.

[0114] In this embodiment, the functions of each module / unit are as follows:

[0115] The model building module 101 is used to build an instability model based on a preset logarithmic spiral block and an upper cone in the tunnel face to obtain an instability model of the tunnel face;

[0116] The equation adjustment module 102 is used to obtain an initial virtual power calculation equation, and obtain an adjusted virtual power calculation equation by setting an initial loss coefficient for the initial virtual power calculation equation;

[0117] The energy consumption calculation module 103 is used to query the parameters required for adjusting the virtual power calculation equation, obtain the required parameters, and calculate the external force power and internal energy consumption of the face based on the face instability model and the required parameters to obtain the face external force power and face internal energy consumption;

[0118] The safety factor determination module 104 is used to substitute the required parameters, the external force power of the tunnel face and the internal energy consumption of the tunnel face into the adjusted virtual power calculation equation, calculate the stability safety factor, and obtain the initial safety factor; judge whether the tunnel face is stable according to the initial safety factor, and obtain the tunnel face stability safety factor when the tunnel face is stable.

[0119] In detail, each module described in the device for determining the safety factor of the tunnel face stability 100 in the embodiment of the present invention is used in the same manner as described above. Figure 1 The above-mentioned method for determining the safety factor of the tunnel face stability has the same technical means and can produce the same technical effect, so it will not be repeated here.

[0120] like Figure 4 , which is a schematic diagram of the structure of an electronic device for implementing the method for determining the safety factor of tunnel face stability according to the present invention.

[0121] 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 program for determining a safety factor of face stability.

[0122] 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 various functions of the electronic device and processes data by running or executing programs or modules stored in the memory 11 (for example, executing a program for determining the safety factor of the stability of the face, etc.), and calling data stored in the memory 11.

[0123] 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 be used not only to store application software and various types of data installed in the electronic device, such as the code of the program for determining the safety factor of the stability of the face, but also to temporarily store data that has been output or is to be output.

[0124] 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.

[0125] 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.

[0126] Figure 4 Only an electronic device with components is shown, and those skilled in the art will understand that Figure 4The 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.

[0127] 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.

[0128] It should be understood that the embodiment is for illustration only and the scope of the patent application is not limited to this structure.

[0129] The program for determining the safety factor of the stability 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:

[0130] The instability model of the tunnel face is constructed based on the preset logarithmic spiral block and the upper cone in the tunnel face, and the instability model of the tunnel face is obtained;

[0131] Obtaining an initial virtual power calculation equation, and obtaining an adjusted virtual power calculation equation by setting an initial loss coefficient for the initial virtual power calculation equation;

[0132] Querying the parameters required for adjusting the virtual power calculation equation to obtain the required parameters, and calculating the external force power and internal energy consumption of the face based on the face instability model and the required parameters to obtain the face external force power and the face internal energy consumption;

[0133] Substituting the required parameters, the external force power of the face and the internal energy consumption of the face into the adjusted virtual power calculation equation, calculating the stability safety factor, and obtaining the initial safety factor;

[0134] Whether the tunnel face is stable is judged by the initial safety factor, and the tunnel face stability safety factor is obtained when the tunnel face is stable.

[0135] Specifically, the specific implementation method of the processor 10 for the above computer program can refer to Figure 1 The description of the relevant steps in the corresponding embodiments will not be repeated here.

[0136] 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).

[0137] 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:

[0138] The instability model of the tunnel face is constructed based on the preset logarithmic spiral block and the upper cone in the tunnel face, and the instability model of the tunnel face is obtained;

[0139] Obtaining an initial virtual power calculation equation, and obtaining an adjusted virtual power calculation equation by setting an initial loss coefficient for the initial virtual power calculation equation;

[0140] Querying the parameters required for adjusting the virtual power calculation equation to obtain the required parameters, and calculating the external force power and internal energy consumption of the face based on the face instability model and the required parameters to obtain the face external force power and the face internal energy consumption;

[0141] Substituting the required parameters, the external force power of the face and the internal energy consumption of the face into the adjusted virtual power calculation equation, calculating the stability safety factor, and obtaining the initial safety factor;

[0142] Whether the tunnel face is stable is judged by the initial safety factor, and the tunnel face stability safety factor is obtained when the tunnel face is stable.

[0143] 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.

[0144] 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.

[0145] 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.

[0146] 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.

[0147] 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.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] 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 determining the safety factor of a tunnel face stability, characterized in that: The method comprises: The instability model of the tunnel face is constructed based on the preset logarithmic spiral block and the upper cone in the tunnel face, and the instability model of the tunnel face is obtained; Obtaining an initial virtual power calculation equation, and obtaining an adjusted virtual power calculation equation by setting an initial loss coefficient for the initial virtual power calculation equation; Querying the parameters required for adjusting the virtual power calculation equation to obtain the required parameters, and calculating the external force power and internal energy consumption of the face based on the face instability model and the required parameters to obtain the face external force power and the face internal energy consumption; Substituting the required parameters, the external force power of the face and the internal energy consumption of the face into the adjusted virtual power calculation equation, calculating the stability safety factor, and obtaining the initial safety factor; Whether the tunnel face is stable is judged by the initial safety factor, and the tunnel face stability safety factor is obtained when the tunnel face is stable.

2. The method for determining the safety factor of tunnel face stability according to claim 1, characterized in that: The instability model is constructed based on the preset logarithmic spiral block and the upper cone in the tunnel face to obtain the tunnel face instability model, including: Obtaining the rotation radius of the logarithmic spiral block and the friction angle of the rock mass in the tunnel; Obtain the physical and mechanical parameters of the cone above the tunnel face; An original tunnel face instability model is constructed according to the rotation radius of the logarithmic spiral block, the friction angle of the rock mass in the tunnel, and the physical and mechanical parameters of the cone above the tunnel face; The original tunnel face instability model is adjusted by querying the tunnel face excavation footage and the advanced small pipe support parameters to obtain the tunnel face instability model.

3. The method for determining the safety factor of the tunnel face stability according to claim 1, characterized in that: The step of calculating the external force power and internal energy consumption of the face based on the face instability model and the required parameters 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 the block parameters of the first block and the second block through the required parameters, and calculating the external force power of the first block and the second block respectively 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 determining the safety factor of tunnel face stability according to claim 1, characterized in that: Substituting the required parameters, the external force power of the face and the internal energy consumption of the face into the adjusted virtual power calculation equation, calculating the stability safety factor, and obtaining the initial safety factor, includes: Calculating the energy dissipation rate of the leading small duct on the velocity discontinuity surface of the tunnel face based on the required parameters to obtain the duct energy dissipation rate; The objective function is constructed by using the external force power of the face, the internal energy consumption of the face and the energy dissipation rate of the conduit, and the initial safety factor is obtained by calculation.

5. The method for determining the safety factor of tunnel face stability according to claim 1, characterized in that: The determining whether the tunnel face is stable by using the initial safety factor and obtaining the tunnel face stability safety factor when the tunnel face is stable includes: Whether the tunnel face is stable is determined by the initial safety factor: When the tunnel face is stable, the loss coefficient of the adjusted virtual power calculation equation is increased, and the parameters required for the adjusted virtual power calculation equation are returned to be queried to obtain the required parameters, and the external force power and internal energy consumption of the tunnel face are calculated based on the tunnel face instability model and the required parameters to obtain the tunnel face external force power and the tunnel face internal energy consumption; When the tunnel face is unstable, the tunnel face stability safety factor is obtained according to the initial safety factor.

6. The method for determining the safety factor of the tunnel face stability according to claim 3, characterized in that: The logarithmic spiral is: Where r is the rotation radius 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 the edge, 0≤θ≤ π / 2.

7. The method for determining the safety factor of the tunnel face stability according to any one of claims 1 to 6, characterized in that: The initial depreciation coefficient is 1.

8. A device for determining the safety factor of a tunnel face stability, characterized in that: The device comprises: A model building module is used to build an instability model based on a preset logarithmic spiral block and an upper cone in the tunnel face to obtain an instability model of the tunnel face; An equation adjustment module is used to obtain an initial virtual power calculation equation, and obtain an adjusted virtual power calculation equation by setting an initial loss coefficient for the initial virtual power calculation equation; An energy consumption calculation module is used to query the parameters required for adjusting the virtual power calculation equation, obtain the required parameters, and calculate the external force power and internal energy consumption of the face based on the face instability model and the required parameters to obtain the face external force power and face internal energy consumption; The safety factor determination module is used to substitute the required parameters, the external force power of the tunnel face and the internal energy consumption of the tunnel face into the adjusted virtual power calculation equation, calculate the stability safety factor, and obtain the initial safety factor; judge whether the tunnel face is stable according to the initial safety factor, and obtain the tunnel face stability safety factor when the tunnel face is stable.

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 perform the method for determining the safety factor of tunnel face stability 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 determining the safety factor of tunnel face stability according to any one of claims 1 to 7 is implemented.

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