A buffer layer parameter detection method, device, equipment and storage medium

Abstract

Embodiments of the present application disclose a kind of buffer layer parameter detection method, device, equipment and storage medium, method includes: obtaining the tunnel attribute information and surrounding rock attribute information of target tunnel;Tunnel attribute information includes: the size parameter and mechanical parameter of target tunnel;Surrounding rock attribute information includes: the mechanical parameter of rock mass of target tunnel;According to tunnel attribute information and surrounding rock attribute information determine buffer layer association information;Buffer layer association information includes: buffer layer thickness and buffer layer compression strain;In the case where buffer layer association information meets buffer layer reference condition, buffer layer association information is used as the target reference information for constructing sprayed polyurethane buffer layer in target tunnel.The technical scheme of the present application embodiment can predict buffer layer parameters in advance based on tunnel attribute parameters and surrounding rock attribute parameters, and determine the corresponding detection result according to the buffer layer parameters, improve the safety of tunnel construction, shorten the preparation period of tunnel construction.

Description

A method, apparatus, device, and storage medium for detecting buffer layer parameters. Technical Field

[0001] The embodiments of the present invention relate to the field of disaster prevention technology for large deformation tunnels, and in particular to a method, apparatus, equipment and storage medium for detecting buffer layer parameters. Background Technology

[0002] Deeply buried tunnels often contain weak rock masses with significant rheological properties and time-dependent weakening effects. To ensure tunnel safety, a buffer layer capable of absorbing the rheological deformation of the surrounding rock is typically installed between the secondary lining and the surrounding rock. The importance of buffer layer and other pressure-bearing support technologies in the long-term stability of tunnels subjected to large deformations in soft rock is evident. However, they have not been widely applied in tunnel engineering, mainly because the technology cannot predict the parameters of the buffer layer in advance, and the selection of these parameters requires careful consideration. Summary of the Invention

[0003] This invention provides a method, apparatus, device, and storage medium for detecting buffer layer parameters. It can predict buffer layer parameters in advance based on tunnel attribute parameters and surrounding rock attribute parameters, and determine the corresponding detection results based on the buffer layer parameters, thereby improving tunnel construction safety and greatly shortening the preparation cycle for tunnel construction.

[0004] In a first aspect, embodiments of the present invention provide a method for detecting buffer layer parameters, the method comprising:

[0005] Obtain tunnel attribute information and surrounding rock attribute information of the target tunnel; wherein, the tunnel attribute information includes: the size parameters and mechanical parameters of the target tunnel; the surrounding rock attribute information includes: the mechanical parameters of the rock mass of the target tunnel;

[0006] The buffer layer association information is determined based on the tunnel attribute information and the surrounding rock attribute information; wherein, the buffer layer association information includes: buffer layer thickness and buffer layer compressive strain;

[0007] If the buffer layer association information meets the buffer layer reference conditions, the buffer layer association information shall be used as the target reference information for constructing a sprayed polyurethane buffer layer in the target tunnel.

[0008] Secondly, embodiments of the present invention provide a buffer layer parameter detection device, the device comprising:

[0009] The tunnel parameter acquisition module is used to acquire tunnel attribute information and surrounding rock attribute information of the target tunnel; wherein, the tunnel attribute information includes: the size parameters and mechanical parameters of the target tunnel; the surrounding rock attribute information includes: the mechanical parameters of the rock mass of the target tunnel;

[0010] The buffer layer parameter determination module is used to determine buffer layer association information based on the tunnel attribute information and the surrounding rock attribute information; wherein, the buffer layer association information includes: buffer layer thickness and buffer layer compressive strain;

[0011] The buffer layer parameter detection module is used to use the buffer layer association information as the target reference information for constructing a sprayed polyurethane buffer layer in the target tunnel when the buffer layer association information meets the buffer layer reference conditions.

[0012] Thirdly, embodiments of the present invention provide a computer device, the computer device comprising:

[0013] One or more processors;

[0014] Memory, used to store one or more programs;

[0015] When the one or more programs are executed by the one or more processors, the one or more processors implement the buffer layer parameter detection method described in any embodiment.

[0016] Fourthly, embodiments of the present invention provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the buffer layer parameter detection method described in any embodiment.

[0017] The technical solution provided by this invention obtains tunnel attribute information and surrounding rock attribute information of the target tunnel. The tunnel attribute information includes the dimensional and mechanical parameters of the target tunnel. The surrounding rock attribute information includes the mechanical parameters of the rock mass of the target tunnel. Based on the tunnel attribute information and surrounding rock attribute information, buffer layer correlation information is determined. The buffer layer correlation information includes the buffer layer thickness and buffer layer compressive strain. When the buffer layer correlation information meets the buffer layer reference conditions, it is used as the target reference information for constructing a sprayed polyurethane buffer layer in the target tunnel. This invention solves the problem in the prior art of being unable to predict buffer layer parameters in advance. It can predict buffer layer parameters in advance based on tunnel attribute parameters and surrounding rock attribute parameters, and determine the corresponding test results based on the buffer layer parameters, thereby improving tunnel construction safety and significantly shortening the tunnel construction preparation cycle. Attached Figure Description

[0018] Figure 1 is a flowchart of a buffer layer parameter detection method provided in an embodiment of the present invention;

[0019] Figure 2 is a flowchart of another buffer layer parameter detection method provided by an embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of a target tunnel provided in an embodiment of the present invention;

[0021] Figure 4 is a schematic diagram of a coordinate system for the thickness and density of the buffer layer provided in the example of the present invention;

[0022] Figure 5 is a schematic diagram of a buffer layer parameter detection device provided in an embodiment of the present invention;

[0023] Figure 6 is a schematic diagram of the structure of a computer device provided in an embodiment of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Figure 1 is a flowchart of a buffer layer parameter detection method provided by an embodiment of the present invention. The embodiment of the present invention can be applied to scenarios where the parameters of the buffer layer in a tunnel are detected. The method can be executed by a buffer layer parameter detection device, which can be implemented by software and / or hardware.

[0026] As shown in Figure 1, the buffer layer parameter detection method includes the following steps:

[0027] S110. Obtain tunnel attribute information and surrounding rock attribute information of the target tunnel.

[0028] The target tunnel may be a tunnel whose parameters for its buffer layer need to be determined. Specifically, a sprayed polyurethane buffer layer needs to be added to the target tunnel as its internal buffer layer. For example, the target tunnel may include an initial support layer, a secondary lining layer, and a sprayed polyurethane buffer layer. Specifically, the outer layer of the target tunnel is the initial support layer, the inner layer is the secondary lining layer, and the sprayed polyurethane buffer layer is the intermediate layer between the initial support layer and the secondary lining layer.

[0029] Tunnel attribute information can include the target tunnel's dimensional and geological parameters. Specifically, tunnel attribute parameters can include parameters such as tunnel excavation radius, initial ground stress, and secondary lining thickness. Surrounding rock attribute information can include relevant attribute parameters of the target tunnel's surrounding rock. Specifically, surrounding rock attribute information can include parameters such as the target tunnel's rock mass's friction angle, cohesion, and shear modulus. Furthermore, the target tunnel's tunnel attribute information and surrounding rock attribute information can be obtained through appropriate machinery and equipment; the specific method of acquisition is not limited here.

[0030] S120. Determine the buffer layer association information based on the tunnel attribute information and the surrounding rock attribute information.

[0031] The buffer layer-related information can be the relevant parameter values ​​of the polyurethane buffer layer sprayed in the target tunnel. Specifically, the buffer layer-related information includes: buffer layer thickness and buffer layer compressive strain. Specifically, the extrusion deformation of the surrounding rock and the yield deformation of the secondary lining can be determined based on the tunnel attribute information and the surrounding rock attribute information. Then, these values ​​are substituted into the buffer layer thickness determination function to obtain the buffer layer thickness. Finally, the compressive strain of the buffer layer is determined based on the extrusion deformation of the surrounding rock, the yield deformation of the secondary lining, and the buffer layer thickness.

[0032] The buffer layer thickness can be the numerical value of the buffer layer thickness in the target tunnel. The buffer layer compressive strain can also be the numerical value of the buffer layer compressive strain in the target tunnel. The buffer layer thickness determination function can be a preset function for solving the buffer layer thickness. Specifically, the buffer layer thickness determination function can be determined from long-term experimental data on the buffer layer thickness. This invention innovatively proposes a buffer layer thickness determination function, which can predict the buffer layer thickness in advance based on this function, improving the accuracy of buffer layer parameter determination. This facilitates timely adjustments to the design of the target tunnel based on the predicted buffer layer thickness, improving tunnel construction safety and shortening the tunnel construction cycle.

[0033] S130. If the buffer layer association information meets the buffer layer reference conditions, the buffer layer association information shall be used as the target reference information for constructing a sprayed polyurethane buffer layer in the target tunnel.

[0034] The buffer layer reference conditions can be used as reference detection conditions to determine the feasibility of buffer layer parameters in the target tunnel. Specifically, a corresponding buffer layer parameter threshold range can be preset, and then the buffer layer association information of the target tunnel can be compared with the buffer layer parameter threshold range. Based on the comparison result, it can be determined whether the buffer layer association information meets the buffer layer reference conditions. For example, when the buffer layer association information of the target tunnel is within the buffer layer parameter threshold range, it can be determined that the buffer layer association information meets the buffer layer reference conditions; when the buffer layer association information of the target tunnel is not within the buffer layer parameter threshold range, it can be determined that the buffer layer association information does not meet the buffer layer reference conditions. This can be understood as follows: when the buffer layer association information meets the buffer layer reference conditions, construction based on the buffer layer association information is feasible and less likely to cause safety accidents. Conversely, when the buffer layer association information does not meet the buffer layer reference conditions, it can be considered that construction based on the buffer layer association information poses certain safety hazards, and the buffer layer association information is not feasible.

[0035] Furthermore, the target reference information can be the buffer layer construction information used to construct the sprayed polyurethane buffer layer in the target tunnel. Specifically, if the buffer layer association information meets the buffer layer reference conditions, it means that construction based on the buffer layer association information is feasible and less likely to cause safety accidents. Therefore, the buffer layer association information can be used as the target reference information for constructing the sprayed polyurethane buffer layer in the target tunnel, and then the sprayed polyurethane buffer layer can be constructed in the target tunnel based on the target reference information.

[0036] The technical solution provided by this invention obtains tunnel attribute information and surrounding rock attribute information of the target tunnel. The tunnel attribute information includes the dimensional and mechanical parameters of the target tunnel. The surrounding rock attribute information includes the mechanical parameters of the rock mass of the target tunnel. Based on the tunnel attribute information and surrounding rock attribute information, buffer layer correlation information is determined. The buffer layer correlation information includes the buffer layer thickness and buffer layer compressive strain. When the buffer layer correlation information meets the buffer layer reference conditions, it is used as the target reference information for constructing a sprayed polyurethane buffer layer in the target tunnel. This invention solves the problem in the prior art of being unable to predict buffer layer parameters in advance. It can predict buffer layer parameters in advance based on tunnel attribute parameters and surrounding rock attribute parameters, and determine the corresponding test results based on the buffer layer parameters, thereby improving tunnel construction safety and significantly shortening the tunnel construction preparation cycle.

[0037] Figure 2 is a flowchart of another buffer layer parameter detection method provided by an embodiment of the present invention. This embodiment is applicable to scenarios where parameters of a buffer layer in a tunnel are detected. Based on the above embodiments, this embodiment further explains how to determine buffer layer association information based on tunnel attribute information and surrounding rock attribute information; and how to determine the target buffer layer parameter detection result based on the buffer layer association information. This device can be implemented by software and / or hardware and integrated into a computer device with application development capabilities.

[0038] As shown in Figure 2, the buffer layer parameter detection method includes the following steps:

[0039] S210. Obtain tunnel attribute information and surrounding rock attribute information of the target tunnel.

[0040] The target tunnel may be a tunnel whose parameters for its buffer layer need to be determined. Specifically, a sprayed polyurethane buffer layer needs to be added to the target tunnel as its internal buffer layer. For example, the target tunnel may include an initial support layer, a secondary lining layer, and a sprayed polyurethane buffer layer. Specifically, the outer layer of the target tunnel is the initial support layer, the inner layer is the secondary lining layer, and the sprayed polyurethane buffer layer is the intermediate layer between the initial support layer and the secondary lining layer.

[0041] For example, Figure 3 is a schematic diagram of the structure of a target tunnel provided in an embodiment of the present invention. As shown in Figure 3, the target tunnel consists of, from the inside out: a secondary lining layer, a sprayed polyurethane buffer layer, and an initial support layer.

[0042] Tunnel attribute information can include the target tunnel's dimensional and geological parameters. Specifically, tunnel attribute parameters can include parameters such as tunnel excavation radius, initial ground stress, and secondary lining thickness. Surrounding rock attribute information can include relevant attribute parameters of the target tunnel's surrounding rock. Specifically, surrounding rock attribute information can include parameters such as the target tunnel's rock mass's friction angle, cohesion, and shear modulus. Furthermore, the target tunnel's tunnel attribute information and surrounding rock attribute information can be obtained through appropriate machinery and equipment; the specific method of acquisition is not limited here.

[0043] S220. Determine the extrusion deformation of the surrounding rock and the yield deformation of the secondary lining based on the tunnel attribute information and the surrounding rock attribute information.

[0044] The surrounding rock extrusion deformation can be a numerical value of the extrusion deformation parameters of the surrounding rock of the target tunnel. Specifically, the surrounding rock extrusion deformation can be determined jointly based on tunnel attribute information and surrounding rock attribute information. For example, the extrusion deformation (u0) and deformation pressure (P) can be obtained based on elastoplastic theory. s The relationship between them. The formula for solving the extrusion deformation of the surrounding rock is shown below:

[0045]

[0046] in, denoted as rock friction angle (°); c is cohesion (kPa); G is shear modulus (MPa); R0 is tunnel excavation radius; P0 is initial ground stress.

[0047] Furthermore, the yield deformation of the secondary lining can be the yield deformation of the secondary lining layer of the target tunnel. Specifically, the yield deformation (u) of the secondary lining can be calculated based on its ultimate bearing capacity (Py) and equivalent stiffness (K). y Specifically, the formula for calculating the yield deformation of the secondary lining is shown below:

[0048]

[0049] The ultimate bearing capacity (Py) and equivalent stiffness (K) of the secondary lining can be calculated using the following formula:

[0050]

[0051] Where σ2 is the uniaxial strength of the secondary lining; E2 is the elastic modulus of the secondary lining; ν2 is the Poisson's ratio of the secondary lining; R0 is the tunnel excavation radius; and t2 is the thickness of the secondary lining.

[0052] S230. Determine the buffer layer association information based on the surrounding rock extrusion deformation and the secondary lining yield deformation.

[0053] The buffer layer-related information can be the relevant parameter values ​​of the polyurethane buffer layer sprayed in the target tunnel. Specifically, the buffer layer-related information includes: buffer layer thickness and buffer layer compressive strain. The buffer layer-related information is determined based on tunnel and surrounding rock properties, including: substituting the surrounding rock extrusion deformation and secondary lining yield deformation into the buffer layer thickness determination function to obtain the buffer layer thickness; and determining the buffer layer compressive strain based on the surrounding rock extrusion deformation, secondary lining yield deformation, and buffer layer thickness.

[0054] The buffer layer thickness can be the numerical value of the buffer layer thickness in the target tunnel. The buffer layer compressive strain can also be the numerical value of the buffer layer compressive strain in the target tunnel. The buffer layer thickness determination function can be a preset function for solving the buffer layer thickness. Specifically, the buffer layer thickness determination function can be determined from long-term experimental data on the buffer layer thickness. This invention innovatively proposes a buffer layer thickness determination function, which can predict the buffer layer thickness in advance based on this function, improving the accuracy of buffer layer parameter determination. This facilitates timely adjustments to the design of the target tunnel based on the predicted buffer layer thickness, improving tunnel construction safety and shortening the tunnel construction cycle.

[0055] Specifically, the function for determining the thickness of the buffer layer is:

[0056]

[0057] Where tc represents the thickness of the buffer layer; N represents the fitting parameters of the first buffer layer. M represents the fitting parameters for the second buffer layer, M = 0.00095ρ 1.5 ; ρ represents the density of the buffer layer, ρ∈[25,150kg / m3]; u0 represents the extrusion deformation of the surrounding rock; Py represents the ultimate bearing capacity of the secondary lining; R0 is the tunnel excavation radius; σ2 represents the uniaxial strength of the secondary lining concrete; t2 is the thickness of the secondary lining.

[0058] Furthermore, after determining the buffer layer thickness, the compressive strain of the buffer layer can be determined based on the surrounding rock extrusion deformation, the yield deformation of the secondary lining, and the buffer layer thickness. Specifically, this is determined based on the ultimate elastic deformation (u) of the secondary lining under the ultimate condition. y The compressive strain (ε) of the buffer layer can be calculated from the extrusion deformation (u0) of the surrounding rock. c )for:

[0059]

[0060] S240. Construct an initial coordinate system and determine the buffer layer thickness reference curve in the initial coordinate system according to the buffer layer thickness determination function.

[0061] The initial coordinate system can be used to describe the buffer layer thickness and density. Specifically, the horizontal axis of the initial coordinate system represents the buffer layer density, and the vertical axis represents the buffer layer thickness. The horizontal axis direction corresponds to the increasing direction of the buffer layer density, and the vertical axis direction corresponds to the increasing direction of the buffer layer thickness. The buffer layer thickness reference curve can be used to evaluate the feasibility of the buffer layer thickness. Specifically, the buffer layer thickness reference curve can be determined in the initial coordinate system based on the buffer layer thickness determination function. For example, the buffer layer thickness corresponding to different buffer layer density values ​​can be determined based on the buffer layer thickness determination function, thereby obtaining multiple pairs of data regarding the buffer layer density and buffer layer thickness. Each pair of data is then mapped to the initial coordinate system, resulting in multiple mapped coordinate points. Each mapped coordinate point is then fitted to obtain the buffer layer thickness reference curve.

[0062] S250. Map the thickness of the buffer layer to the initial coordinate system to obtain the thickness mapping coordinate point.

[0063] The thickness mapping coordinate point can be the coordinate point corresponding to the thickness of the buffer layer of the target tunnel in the initial coordinate system. Specifically, based on the calculated buffer layer thickness and corresponding buffer layer density value of the target tunnel, the corresponding coordinate point can be found in the initial coordinate system and used as the thickness mapping coordinate point.

[0064] S260. Based on the positional correspondence between the thickness mapping coordinate points and the buffer layer thickness reference curve, determine the target buffer layer parameter detection result. If the target buffer layer parameter detection result indicates that the buffer layer association information meets the buffer layer reference conditions, use the buffer layer association information as the buffer layer association information for constructing a sprayed polyurethane buffer layer in the target tunnel.

[0065] The target buffer layer parameter detection result can be a result of whether the buffer layer association information meets the buffer layer reference conditions. Specifically, the target buffer layer parameter detection result can be determined based on the upper and lower correspondence between the thickness mapping coordinate point and the buffer layer thickness reference curve. For example, when the thickness mapping coordinate point is above the buffer layer thickness reference curve, it can be determined that the buffer layer association information meets the buffer layer reference conditions; when the thickness mapping coordinate point is below the buffer layer thickness reference curve, it can be determined that the buffer layer association information does not meet the buffer layer reference conditions. This can be understood as follows: when the thickness mapping coordinate point is above the buffer layer thickness reference curve, construction based on the buffer layer thickness corresponding to the thickness mapping coordinate point is feasible and unlikely to cause safety accidents. Conversely, when the thickness mapping coordinate point is below the buffer layer thickness reference curve, construction based on the buffer layer thickness corresponding to the thickness mapping coordinate point is considered to pose certain safety hazards, and that buffer layer thickness is not feasible.

[0066] Optionally, a compressive strain reference range can be obtained, and a thickness reference range can be determined based on the compressive strain reference range; a thickness reference region can be determined in the initial coordinate system based on the thickness reference range; and the buffer layer thickness detection result can be determined based on the positional correspondence between the thickness mapping coordinate points and the thickness reference region.

[0067] The compressive strain reference range can be a preset reference threshold range for the compressive strain of the buffer layer. The thickness reference range can be a reference threshold range for the thickness of the buffer layer. Specifically, based on the correspondence between the compressive strain and the thickness of the buffer layer, the two extreme points of the thickness reference range can be transformed into two extreme points for the thickness of the buffer layer, and then the thickness reference range can be constructed based on these two extreme points. Optionally, the compressive strain reference range can be set manually. For example, based on the deformation characteristics of sprayed polyurethane foam, when the compressive strain of the foam is greater than 50%, its deformation capacity decreases sharply, and it can be considered to have no deformation capacity at 80% strain. To fully utilize the buffer layer's ability to absorb surrounding rock deformation and without excessive strain, we recommend a compressive strain ε. c ∈[50%, 80%]. Therefore, considering density as a variable, within the specified range, it can be calculated based on t. c The value is then used to calculate the compressive strain (ε). c When the compressive strain is between 50% and 80%, it indicates that the density meets the requirements for large deformation.

[0068] Furthermore, the thickness reference region can be a reference area for the buffer layer thickness in the initial coordinate system. Furthermore, the buffer layer thickness detection result can be the result of detecting whether the buffer layer thickness is optimal. Specifically, the buffer layer thickness detection result can be determined based on the positional correspondence between the thickness mapping coordinate point and the thickness reference region. For example, when the thickness mapping coordinate point is within the height reference region, the buffer layer thickness detection result can be determined as optimal, and this buffer layer thickness can meet the large deformation requirements. When the thickness mapping coordinate point is not within the thickness reference region, the buffer layer thickness detection result can be determined as poor, and this buffer layer thickness may not meet the large deformation requirements. The buffer layer thickness detection result can be understood as a more stringent detection result compared to the target buffer layer parameter detection result. When the thickness mapping coordinate point is within the thickness reference region, the buffer layer thickness is not only reasonable but also meets the large deformation requirements. Considering all factors, this buffer layer thickness is optimal.

[0069] Optionally, based on the thickness reference range, a thickness reference region is determined in the initial coordinate system, including: determining a first curve boundary point and a second curve boundary point in the buffer layer thickness reference curve based on the thickness reference range; wherein the ordinate of the first curve boundary point is smaller than the ordinate of the second curve boundary point; extending along the vertical axis from the first curve boundary point to determine a first boundary ray, and extending along the horizontal axis in the opposite direction from the second curve boundary point to determine a second boundary ray; and determining the thickness reference region based on the first boundary ray, the second boundary ray, and the buffer layer thickness reference curve.

[0070] The first curve boundary point can be the coordinate point corresponding to the minimum value in the thickness reference range on the buffer layer thickness reference curve. The second curve boundary point can be the coordinate point corresponding to the maximum value in the thickness reference range on the buffer layer thickness reference curve. The first boundary curve can be a ray formed by the first curve boundary points. Specifically, the first boundary curve can be obtained by extending along the vertical axis from the first curve boundary point. Similarly, the second boundary curve can be a ray formed by the second curve boundary points. Specifically, the second boundary ray can be determined by extending along the horizontal axis in the opposite direction from the second curve boundary point. Furthermore, the closed region formed by the first boundary ray, the second boundary ray, and the buffer layer thickness reference curve can be considered as the thickness reference region.

[0071] As an example, an embodiment for determining buffer layer association information is described below. Specifically, this embodiment includes the following steps:

[0072] S1: Statistical analysis of tunnel geometry and surrounding rock parameters;

[0073] S2: Calculate the extrusion deformation of the surrounding rock;

[0074] S3: Calculate the yield deformation of the secondary lining;

[0075] S4: Determine the thickness and density of the sprayed polyurethane buffer layer;

[0076] The amount of extrusion deformation of the surrounding rock is determined using the following method:

[0077] According to the elastic-plastic theory, the extrusion deformation (u0) and the deformation pressure (P) can be obtained. s The relationship between them:

[0078]

[0079] In the formula, c and G represent the rock mass friction angle (°), cohesion (kPa), and shear modulus (MPa), respectively. R0 is the tunnel excavation radius, and P0 is the initial ground stress.

[0080] Furthermore, the yield deformation of the secondary lining is determined using the following method:

[0081] Based on existing research, the yield deformation (u) of the secondary lining can be calculated from its ultimate bearing capacity (Py) and its equivalent stiffness (K). y ):

[0082]

[0083] The ultimate bearing capacity (Py) and equivalent stiffness (K) of the secondary lining can be calculated using the following formula:

[0084]

[0085] In the formula, σ2, E2, and ν2 are the uniaxial strength, elastic modulus, and Poisson's ratio of the secondary lining concrete, respectively; R0 is the tunnel excavation radius; and t2 is the thickness of the secondary lining.

[0086] Furthermore, the thickness of the sprayed polyurethane buffer layer is determined using the following method:

[0087] Based on numerous indoor compression tests of sprayed polyurethane foam, and considering the ultimate bearing capacity of the secondary lining, the thickness (t) of the buffer layer under different densities (ρ) is proposed. c The formula for calculating ) is:

[0088]

[0089] In the formula, And M = 0.00095ρ 1.5All are density-related parameters obtained from experimental fitting, and ρ∈[25,150kg / m³]. 3 ].

[0090] Furthermore, the density of the spray-applied urethane buffer layer was determined using the following method:

[0091] Based on the ultimate elastic deformation (u) of the secondary lining under the ultimate condition y The compressive strain (ε) of the sprayed polyurethane buffer layer can be calculated from the extrusion deformation (u0) of the surrounding rock. c )for:

[0092]

[0093] Based on the deformation characteristics of sprayed polyurethane foam, its deformation capacity decreases sharply when the foam strain exceeds 50%, and it can be considered to have no deformation capacity at 80% strain. To fully utilize the buffer layer's ability to absorb surrounding rock deformation and to avoid excessive application, we recommend ε... c ∈[50%, 80%]. Therefore, considering density as a variable, within the specified range, it can be calculated based on t. c The value is then used to calculate the compressive strain (ε). c When the compressive strain is between 50% and 80%, it indicates that the density meets the requirements for large deformation.

[0094] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention targets a specific sprayable buffer layer material, which has the advantage of being sprayable; secondly, it proposes calculation formulas for the density and laying thickness of the material, which can be determined based on existing geological survey and design data, and has the advantages of advanced prediction and simplicity and rationality, making it more suitable for dynamic design adjustments during on-site construction, and has high feasibility, economic and promotional value.

[0095] The following uses a circular tunnel as a verification example to illustrate the rationality of the method. For example, Figure 4 is a schematic diagram of a coordinate system regarding the thickness and density of the buffer layer provided by this invention. The curve formed by the dashed lines is the buffer layer thickness reference curve corresponding to Example 1, and the triangular-like area above this curve is the thickness reference area corresponding to Example 1. The curve formed by the solid lines is the buffer layer thickness reference curve corresponding to Example 2, and the triangular-like area above this curve is the thickness reference area corresponding to Example 2.

[0096] Example 1:

[0097] The basic parameters of the circular tunnel are R0 = 6.5m, t1 = 0.24m, t2 = 0.5m, P0 = 7.5MPa, ν p=0.1, ν2 = 0.2, E0 = 0.8GPa, E2 = 30GPa, σ2 = 30MPa, c = 0.58 MPa. According to existing literature, when the polyurethane buffer layer thickness is 20 cm and the density is 80 kg / m³... 3 When the compressive strain is between 50% and 80%, the buffer layer thickness can meet the requirements for large deformation prevention. Furthermore, when using the method proposed in this study, the predicted curves for the density and thickness of the polyurethane buffer layer are shown in Figure 4. It should be noted that when the data points are distributed above the predicted curve, it indicates that the thickness of the buffer layer meets the requirements for absorbing the deformation of the surrounding rock and has a margin; when the data points are distributed below the predicted curve, it indicates that the thickness of the buffer layer is less than the minimum thickness required for absorbing the deformation of the surrounding rock and does not meet the requirements for large deformation prevention. It can be seen that the parameters suggested in existing literature are higher than the predicted curve, indicating that this predicted curve effectively encompasses the reasonable parameters. Furthermore, when the compressive strain is between 50% and 80%, the buffer layer thickness recommended by this method is between 10.8 and 17.4 cm, and the density is between 57.5 and 105.4 kg / m³. 3 As shown in the shaded area of ​​Figure 4, this method not only predicts thickness and density reasonably, but also yields range values ​​rather than definite solutions, greatly facilitating material selection during actual spraying operations.

[0098] Example 2:

[0099] The basic parameters of the circular tunnel are R0 = 4.572m, t1 = 0.25m, t2 = 0.35m, P0 = 6.895MPa, ν p =0.12, ν2 = 0.2, E0 = 1GPa, E2 = 16.5GPa, σ2 = 16.5MPa, c = 0.3 MPa. According to existing literature, a polyurethane buffer layer thickness of 15, 30, or 50 cm can meet the requirements for large deformation prevention. Furthermore, using the method proposed in this study, the predicted curves for the density and thickness of the polyurethane buffer layer are shown in Figure 4. Similarly, the parameters suggested in existing literature are higher than those in the predicted curve, indicating that the predicted curve effectively encompasses the reasonable parameters. Furthermore, when the compressive strain is between 50% and 80%, the buffer layer thickness recommended by this method is between 14.9 and 23.9 cm, and the density is between 37.3 and 70.9 kg / m³. 3 As shown in the shaded area of ​​Figure 4, this method not only predicts thickness and density reasonably, but also yields range values ​​rather than definite solutions, greatly facilitating material selection during actual spraying operations.

[0100] The technical solution provided by this invention involves acquiring tunnel attribute information and surrounding rock attribute information of the target tunnel; determining the surrounding rock extrusion deformation and secondary lining yield deformation based on the tunnel attribute information and surrounding rock attribute information; determining buffer layer association information based on the surrounding rock extrusion deformation and secondary lining yield deformation; constructing an initial coordinate system; determining a buffer layer thickness reference curve in the initial coordinate system based on a buffer layer thickness determination function; mapping the buffer layer thickness value to the initial coordinate system to obtain thickness mapping coordinate points; determining the target buffer layer parameter detection result based on the positional correspondence between the thickness mapping coordinate points and the buffer layer thickness reference curve; and, if the target buffer layer parameter detection result indicates that the buffer layer information meets the buffer layer reference conditions, using the buffer layer association information as the buffer layer association information for constructing a sprayed polyurethane buffer layer in the target tunnel. This invention solves the problem of the inability to predict buffer layer parameters in advance in the prior art. It can predict buffer layer parameters in advance based on tunnel attribute parameters and surrounding rock attribute parameters, and determine the corresponding detection results based on the buffer layer parameters, thereby improving tunnel construction safety and significantly shortening the tunnel construction preparation cycle.

[0101] Figure 5 is a schematic diagram of a buffer layer parameter detection device provided in an embodiment of the present invention. The present invention can be applied to scenarios where parameters of the buffer layer in a tunnel are detected. The device can be implemented by software and / or hardware and integrated into a computer device with application development capabilities.

[0102] As shown in Figure 5, the buffer layer parameter detection device includes: a tunnel parameter acquisition module 310, a buffer layer parameter determination module 320, and a buffer layer parameter detection module 330.

[0103] The tunnel parameter acquisition module 310 is used to acquire tunnel attribute information and surrounding rock attribute information of the target tunnel; wherein the tunnel attribute information includes: the size parameters and mechanical parameters of the target tunnel; the surrounding rock attribute information includes: the mechanical parameters of the rock mass of the target tunnel; the buffer layer parameter determination module 320 is used to determine buffer layer association information based on the tunnel attribute information and the surrounding rock attribute information; wherein the buffer layer association information includes: buffer layer thickness and buffer layer compressive strain; the buffer layer parameter detection module 330 is used to, if the buffer layer association information meets the buffer layer reference conditions, use the buffer layer association information as the target reference information for constructing a sprayed polyurethane buffer layer in the target tunnel.

[0104] The technical solution provided by this invention involves acquiring tunnel attribute information and surrounding rock attribute information of a target tunnel; wherein the target tunnel includes a sprayed polyurethane buffer layer; determining buffer layer association information based on the tunnel attribute information and the surrounding rock attribute information; and determining the target buffer layer parameter detection results based on the buffer layer association information. This invention solves the problem in the prior art of being unable to predict buffer layer parameters in advance. It can predict buffer layer parameters in advance based on tunnel attribute parameters and surrounding rock attribute parameters, and determine the corresponding detection results based on the buffer layer parameters, thereby improving tunnel construction safety and significantly shortening the tunnel construction preparation cycle.

[0105] In one optional implementation, the buffer layer parameter determination module 320 is specifically used to: determine the surrounding rock extrusion deformation and the secondary lining yield deformation based on the tunnel attribute information and the surrounding rock attribute information; and determine the buffer layer association information based on the surrounding rock extrusion deformation and the secondary lining yield deformation.

[0106] In one optional implementation, the buffer layer associated information includes: buffer layer thickness and buffer layer compressive strain. The buffer layer parameter determination module 320 includes: a buffer layer associated information determination unit, used to: substitute the surrounding rock extrusion deformation and the secondary lining yield deformation into the buffer layer thickness determination function to obtain the buffer layer thickness; and determine the buffer layer compressive strain based on the surrounding rock extrusion deformation, the secondary lining yield deformation, and the buffer layer thickness.

[0107] In one optional implementation, the buffer layer thickness determination function is:

[0108]

[0109] Among them, t c Indicates the thickness of the buffer layer; N represents the fitting parameters of the first buffer layer. M represents the fitting parameters for the second buffer layer, M = 0.00095ρ 1.5 ρ represents the density of the buffer layer, ρ∈[25,150kg / m³] 3 ]; u0 represents the extrusion deformation of the surrounding rock; Py represents the ultimate bearing capacity of the secondary lining; R0 is the tunnel excavation radius; σ2 represents the uniaxial strength of the secondary lining concrete; t2 is the thickness of the secondary lining.

[0110] In one optional implementation, the buffer layer parameter detection module 330 is specifically used for: constructing an initial coordinate system; determining a buffer layer thickness reference curve in the initial coordinate system according to the buffer layer thickness determination function; wherein the horizontal axis of the initial coordinate system is the direction of increasing buffer layer density, and the vertical axis is the direction of increasing buffer layer thickness; mapping the buffer layer thickness to the initial coordinate system to obtain thickness mapping coordinate points; determining the target buffer layer parameter detection result according to the positional correspondence between the thickness mapping coordinate points and the buffer layer thickness reference curve; wherein the target buffer layer parameter detection result is the detection result that the buffer layer association information meets the buffer layer reference conditions.

[0111] In an optional embodiment, the buffer layer parameter detection device further includes a buffer layer thickness detection module, configured to: obtain a compressive strain reference range and determine a thickness reference range based on the compressive strain reference range; determine a thickness reference region in the initial coordinate system based on the thickness reference range; and determine the buffer layer thickness detection result based on the positional correspondence between the thickness mapping coordinate points and the thickness reference region.

[0112] In one optional embodiment, the buffer layer thickness detection module includes a thickness reference region determination unit, configured to: determine a first curve boundary point and a second curve boundary point in the buffer layer thickness reference curve based on the thickness reference range; wherein the ordinate of the first curve boundary point is smaller than the ordinate of the second curve boundary point; extend along the longitudinal axis starting from the first curve boundary point to determine a first boundary ray, and extend along the opposite transverse axis starting from the second curve boundary point to determine a second boundary ray; and determine the thickness reference region based on the first boundary ray, the second boundary ray, and the buffer layer thickness reference curve.

[0113] The buffer layer parameter detection device provided in this embodiment of the invention can execute the buffer layer parameter detection method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method.

[0114] Figure 6 is a schematic diagram of a computer device provided in an embodiment of the present invention. Figure 6 shows a block diagram of an exemplary computer device 12 suitable for implementing embodiments of the present invention. The computer device 12 shown in Figure 6 is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of the present invention. The computer device 12 can be any terminal device with computing capabilities and can be configured in a buffer layer parameter detection device.

[0115] As shown in Figure 6, the computer device 12 is presented in the form of a general-purpose computing device. The components of the computer device 12 may include, but are not limited to: one or more processors or processing units 16, system memory 28, and a bus 18 connecting different system components (including system memory 28 and processing unit 16).

[0116] Bus 18 can be one or more of several bus architectures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of the various bus architectures. For example, these architectures include, but are not limited to, the Industry Standard Architecture (ISA) bus, the Micro Channel Architecture (MAC) bus, the Enhanced ISA bus, the Video Electronics Standards Association (VESA) local bus, and the Peripheral Component Interconnect (PCI) bus.

[0117] Computer device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by computer device 12, including volatile and non-volatile media, removable and non-removable media.

[0118] System memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache 32. Computer device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, storage system 34 may be used to read and write non-removable, non-volatile magnetic media (not shown in FIG. 6, commonly referred to as a "hard disk drive"). Although not shown in FIG. 6, disk drives for reading and writing to removable non-volatile disks (e.g., "floppy disks") and optical disk drives for reading and writing to removable non-volatile optical disks (e.g., CD-ROMs, DVD-ROMs, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 via one or more data media interfaces. System memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of various embodiments of the present invention.

[0119] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in system memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. Program modules 42 typically perform the functions and / or methods described in the embodiments of the present invention.

[0120] Computer device 12 can also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), and with one or more devices that enable a user to interact with computer device 12, and / or with any device that enables computer device 12 to communicate with one or more other computing devices (e.g., network card, modem, etc.). This communication can be performed via input / output (I / O) interface 22. Furthermore, computer device 12 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 20. As shown in Figure 6, network adapter 20 communicates with other modules of computer device 12 via bus 18. It should be understood that, although not shown in Figure 6, other hardware and / or software modules can be used in conjunction with computer device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0121] Processing unit 16 executes various functional applications and data processing by running programs stored in system memory 28, such as implementing the buffer layer parameter detection method provided in this embodiment, which includes:

[0122] Obtain tunnel attribute information and surrounding rock attribute information of the target tunnel; wherein, the tunnel attribute information includes: the size parameters and mechanical parameters of the target tunnel; the surrounding rock attribute information includes: the mechanical parameters of the rock mass of the target tunnel;

[0123] The buffer layer association information is determined based on the tunnel attribute information and the surrounding rock attribute information; wherein, the buffer layer association information includes: buffer layer thickness and buffer layer compressive strain;

[0124] If the buffer layer association information meets the buffer layer reference conditions, the buffer layer association information shall be used as the target reference information for constructing a sprayed polyurethane buffer layer in the target tunnel.

[0125] This embodiment provides a computer-readable storage medium storing a computer program thereon. When executed by a processor, the program implements the buffer layer parameter detection method as provided in any embodiment of the present invention, including:

[0126] Obtain tunnel attribute information and surrounding rock attribute information of the target tunnel; wherein, the tunnel attribute information includes: the size parameters and mechanical parameters of the target tunnel; the surrounding rock attribute information includes: the mechanical parameters of the rock mass of the target tunnel;

[0127] The buffer layer association information is determined based on the tunnel attribute information and the surrounding rock attribute information; wherein, the buffer layer association information includes: buffer layer thickness and buffer layer compressive strain;

[0128] If the buffer layer association information meets the buffer layer reference conditions, the buffer layer association information shall be used as the target reference information for constructing a sprayed polyurethane buffer layer in the target tunnel.

[0129] The computer storage medium of this invention can be any combination of one or more computer-readable media. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. For example, a computer-readable storage medium can be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0130] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of sending, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0131] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0132] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0133] Those skilled in the art will understand that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. Optionally, they can be implemented using computer-executable program code, thereby allowing them to be stored in a storage device for execution by a computing device, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0134] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A method for detecting buffer layer parameters, characterized in that, include: Acquire tunnel attribute information and surrounding rock attribute information of the target tunnel; wherein, the tunnel attribute information includes: dimensional parameters and mechanical parameters of the target tunnel; the surrounding rock attribute information includes: mechanical parameters of the rock mass of the target tunnel; determine buffer layer association information based on the tunnel attribute information and the surrounding rock attribute information; wherein, the buffer layer association information includes: buffer layer thickness and buffer layer compressive strain; if the buffer layer association information meets the buffer layer reference conditions, use the buffer layer association information as the target reference information for constructing a sprayed polyurethane buffer layer in the target tunnel; wherein, the step of determining the buffer layer association information based on the tunnel attribute information and the surrounding rock attribute information... The associated information includes: determining the extrusion deformation of the surrounding rock and the yield deformation of the secondary lining based on the tunnel attribute information and the surrounding rock attribute information; determining the buffer layer association information based on the extrusion deformation of the surrounding rock and the yield deformation of the secondary lining; wherein, determining the buffer layer association information based on the extrusion deformation of the surrounding rock and the yield deformation of the secondary lining includes: substituting the extrusion deformation of the surrounding rock and the yield deformation of the secondary lining into the buffer layer thickness determination function to obtain the buffer layer thickness; determining the compressive strain of the buffer layer based on the extrusion deformation of the surrounding rock, the yield deformation of the secondary lining, and the buffer layer thickness; wherein, the buffer layer thickness determination function is: Where tc represents the thickness of the buffer layer; N represents the fitting parameters of the first buffer layer, N= M represents the fitting parameters for the second buffer layer, M= ρ represents the buffer layer density, ρ∈[25,150 kg / m³] 3 ]; u0 represents the extrusion deformation of the surrounding rock; Py represents the ultimate bearing capacity of the secondary lining; R0 is the tunnel excavation radius; σ2 represents the uniaxial strength of the secondary lining concrete; t2 is the thickness of the secondary lining.

2. The method according to claim 1, characterized in that, After determining the buffer layer association information, the method further includes: constructing an initial coordinate system, and determining a buffer layer thickness reference curve in the initial coordinate system according to the buffer layer thickness determination function; wherein, the horizontal axis of the initial coordinate system is the direction of increasing buffer layer density, and the vertical axis is the direction of increasing buffer layer thickness; mapping the buffer layer thickness to the initial coordinate system to obtain thickness mapping coordinate points; determining the target buffer layer parameter detection result according to the positional correspondence between the thickness mapping coordinate points and the buffer layer thickness reference curve; wherein, the target buffer layer parameter detection result is the detection result that the buffer layer association information meets the buffer layer reference conditions.

3. The method according to claim 2, characterized in that, The method further includes: obtaining a compressive strain reference range and determining a thickness reference range based on the compressive strain reference range; determining a thickness reference region in the initial coordinate system based on the thickness reference range; and determining the buffer layer thickness detection result based on the positional correspondence between the thickness mapping coordinate points and the thickness reference region.

4. The method according to claim 3, characterized in that, The step of determining the thickness reference region in the initial coordinate system based on the thickness reference range includes: determining a first curve boundary point and a second curve boundary point in the buffer layer thickness reference curve based on the thickness reference range; wherein the ordinate of the first curve boundary point is smaller than the ordinate of the second curve boundary point; extending along the longitudinal axis from the first curve boundary point to determine a first boundary ray, and extending along the opposite transverse axis from the second curve boundary point to determine a second boundary ray; and determining the thickness reference region based on the first boundary ray, the second boundary ray, and the buffer layer thickness reference curve.

5. A buffer layer parameter detection device, characterized in that, The device includes: a tunnel parameter acquisition module for acquiring tunnel attribute information and surrounding rock attribute information of a target tunnel; wherein the tunnel attribute information includes: dimensional parameters and mechanical parameters of the target tunnel; the surrounding rock attribute information includes: mechanical parameters of the rock mass of the target tunnel; a buffer layer parameter determination module for determining buffer layer correlation information based on the tunnel attribute information and the surrounding rock attribute information; wherein the buffer layer correlation information includes: buffer layer thickness and buffer layer compressive strain; and a buffer layer parameter detection module for using the buffer layer correlation information as target reference information for constructing a sprayed polyurethane buffer layer in the target tunnel when the buffer layer correlation information meets the buffer layer reference conditions; wherein the buffer layer... The buffer layer parameter determination module is specifically used for: determining the extrusion deformation of the surrounding rock and the yield deformation of the secondary lining based on the tunnel attribute information and the surrounding rock attribute information; determining buffer layer correlation information based on the extrusion deformation of the surrounding rock and the yield deformation of the secondary lining; wherein, the buffer layer correlation information includes: buffer layer thickness and buffer layer compressive strain, and the buffer layer parameter determination module includes: a buffer layer correlation information determination unit, used for: substituting the extrusion deformation of the surrounding rock and the yield deformation of the secondary lining into the buffer layer thickness determination function to obtain the buffer layer thickness; determining the buffer layer compressive strain based on the extrusion deformation of the surrounding rock, the yield deformation of the secondary lining, and the buffer layer thickness; wherein, the buffer layer thickness determination function is: Among them, t c Indicates the thickness of the buffer layer; N represents the fitting parameters of the first buffer layer, N= M represents the fitting parameters for the second buffer layer, M= ρ represents the buffer layer density, ρ∈[25,150 kg / m³] 3 ]; u0 represents the extrusion deformation of the surrounding rock; Py represents the ultimate bearing capacity of the secondary lining; R0 is the tunnel excavation radius; σ2 represents the uniaxial strength of the secondary lining concrete; t2 is the thickness of the secondary lining.

6. A computer device, characterized in that, The computer device includes: one or more processors; a memory for storing one or more programs; and when the one or more programs are executed by the one or more processors, the one or more processors implement the buffer layer parameter detection method as described in any one of claims 1-4.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the buffer layer parameter detection method as described in any one of claims 1-4.

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