TBM segment energy release layer material strength determination method, system, device and medium

Abstract

The application discloses a TBM segment energy release layer material strength determination method, system, device and medium, and relates to the technical field of computer and mathematical modeling. The method comprises the following steps: acquiring basic parameters, calculating the radial displacement of surrounding rock and the radial displacement of the lining segment, and taking the difference between the two displacements as the compression amount of the energy release layer; determining the real thickness of the energy release layer, which is greater than the compression amount of the energy release layer; updating the outer radius of the energy release layer and the radius of the excavated tunnel according to the real thickness of the energy release layer; calculating the three-dimensional constraint ultimate strength of the energy release layer before compression according to the updated outer radius of the energy release layer and the radius of the excavated tunnel, and taking the three-dimensional constraint ultimate strength as the first strength of the energy release layer; calculating the ultimate strength of the energy release layer material when the lining segment is not damaged, and taking the ultimate strength as the second strength of the energy release layer; and obtaining the final material strength of the energy release layer based on the first strength and the second strength. The application can maximize the optimal energy release performance effect of the energy release layer.

Description

Technical Field

[0001] This invention relates to the fields of computer and mathematical modeling technology, specifically to a method, system, equipment, and medium for determining the strength of the energy release layer material in TBM segments. Background Technology

[0002] With the acceleration of computer-aided intelligent and mechanized construction, TBM segments are now being extended to areas with high ground stress and deep underground engineering. Currently, reinforced concrete segments, steel segments, or steel-concrete composite segments are mainly used in engineering practice. However, in the high ground stress environment of deep-buried tunnels, they are susceptible to the effects of high ground stress and the creep of rock strata over time. The lining segment structure often suffers localized damage due to excessive internal stress, seriously affecting the service safety performance of the tunnel structure.

[0003] Therefore, in order to reduce the stress and stability of the lining segments under deep burial and high ground stress environment, an energy release layer structure that can release ground stress is added to the outside of the lining segments. This energy release layer realizes the release of ground stress gradient through controllable compression deformation, forming a stress buffer zone, thereby protecting the lining segments from damage or reducing damage, and ensuring the safety and stability of the tunnel during service.

[0004] However, the current design of energy release layers faces the challenge of determining the material strength under the influence of multiple factors. Due to the uncertainty of the stress field of deep rock strata, rock mass conditions, and tunnel burial depth, there is a lack of accurate and effective calculation methods for the strength of energy release layer materials. The setting of energy release layer material strength is not based on reasonable grounds. If the strength of energy release layer material is too high or too low, the selected energy release layer material will not be able to play its role effectively.

[0005] In view of the above, this application is hereby submitted. Summary of the Invention

[0006] The technical problem this invention aims to solve is that existing technologies rely on experience to select the material strength of the energy release layer, which cannot accurately determine the material strength and thus fails to maximize the optimal energy release performance. This invention aims to provide a method, system, equipment, and medium for determining the material strength of the energy release layer in TBM tunnel linings. This invention comprehensively considers the influence of factors such as the in-situ stress field of deep rock strata, the uncertainty of rock mass conditions, tunnel depth, and the size and material strength of the lining segments. It not only ensures a relatively accurate first strength for the energy release layer when it can be compressed, but also incorporates a second strength for the energy release layer when the lining segments are not damaged. Based on the first and second strengths, the final material strength of the energy release layer is obtained, making the final material strength more suitable for the service environment and performance of the TBM tunnel. This ensures that the TBM is not damaged under high in-situ stress and creep conditions in the constructed area, thereby guaranteeing that the energy release layer determined according to the material strength has the optimal energy release effect and providing a reasonable basis for subsequent energy release layer material strength configuration.

[0007] This invention is achieved through the following technical solution:

[0008] In a first aspect, the present invention provides a method for determining the strength of the energy release layer material of a TBM segment, the method comprising:

[0009] Obtain the basic parameters, and calculate the radial displacement of the surrounding rock and the radial displacement of the lining segments based on the basic parameters; and take the difference between the radial displacement of the surrounding rock and the radial displacement of the lining segments as the compression amount of the energy release layer;

[0010] Determine the true thickness of the energy release layer, which is greater than the compression of the energy release layer;

[0011] Based on the actual thickness of the energy release layer, update the outer radius of the energy release layer and the radius of the excavated tunnel to obtain the updated outer radius of the energy release layer and the radius of the excavated tunnel;

[0012] Based on the updated outer radius of the energy release layer, the radius of the excavated tunnel, and the foundation parameters, the three-dimensional constrained limit strength of the energy release layer before it can be compressed is calculated, and the three-dimensional constrained limit strength is taken as the first strength of the energy release layer.

[0013] Based on the basic parameters, calculate the ultimate strength of the energy release layer when it protects the lining segments from damage, and take this ultimate strength as the second strength of the energy release layer.

[0014] The minimum value is selected from the first strength and the second strength, and any data that is less than the minimum value and within a preset distance from the minimum value is selected as the final material strength of the energy release layer.

[0015] Furthermore, the basic parameters include the dimensional parameters of the lining segments, the mechanical property parameters of the lining segments, the dimensional parameters of the energy release layer, the mechanical property parameters of the energy release layer, the mechanical property parameters of the surrounding rock in the area where the proposed TBM tunnel is located, and the excavation radius of the proposed TBM tunnel.

[0016] Furthermore, the dimensional parameters of the lining segments include the inner radius of the lining segments. Outer radius of lining segments and the thickness of the lining segments ;

[0017] The mechanical property parameters of the lining segments include the elastic modulus of the lining segments. Poisson's ratio of lining segments ;

[0018] The dimensional parameters of the energy release layer include the inner radius of the energy release layer. and the proposed thickness of the energy release layer ;

[0019] The mechanical properties of the energy release layer include the elastic modulus of the energy release layer material. and the Poisson ratio of the energy release layer ;

[0020] The mechanical properties of the surrounding rock in the area where the proposed TBM tunnel is located include the elastic modulus of the surrounding rock. Poisson's ratio of surrounding rock .

[0021] Furthermore, based on the basic parameters, the radial displacement of the surrounding rock and the radial displacement of the lining segments are calculated; and the difference between the radial displacement of the surrounding rock and the radial displacement of the lining segments is taken as the compression of the energy release layer, including:

[0022] Based on the mechanical property parameters of the lining segments, the mechanical property parameters of the energy release layer, and the mechanical property parameters of the surrounding rock in the area where the proposed TBM tunnel is located, the first and second material constants of the surrounding rock, the energy release layer, and the lining segments are calculated.

[0023] Based on the dimensional parameters of the lining segments, the dimensional parameters of the energy release layer, the radius of the surrounding rock, the first material constant, and the second material constant, several undetermined constants are calculated;

[0024] Calculate the radial displacement of the surrounding rock and the radial displacement of the lining segments based on the undetermined constants;

[0025] The difference between the radial displacement of the surrounding rock and the radial displacement of the lining segments is taken as the compression amount of the energy release layer.

[0026] Furthermore, the updated outer radius of the energy release layer and the radius of the excavated tunnel include:

[0027] The updated excavation tunnel radius is equal to the excavation tunnel radius of the proposed TBM tunnel minus the change in the energy release layer thickness. The change in the energy release layer thickness is equal to the proposed thickness of the energy release layer minus the actual thickness of the energy release layer.

[0028] The updated outer radius of the energy release layer is equal to the updated radius of the excavated tunnel.

[0029] Furthermore, the formula for calculating the first intensity is as follows:

[0030] ;

[0031] in, It is the first strength; F It is the three-dimensional constrained limit strength; The first calculation radius, To calculate the angle, The value range is from the inner radius of the emitting layer to the outer radius of the emitting layer. The value range is 0~360 o Different parts within the calculation range The value is ultimately selected based on the minimum value at different locations within the energy release layer. Value, as the strength of the energy release layer material value;β 1. β 2. β 3 and β 4 are undetermined constants, which are based on the updated excavated tunnel radius. Calculated.

[0032] Furthermore, the ultimate strength of the energy release layer protecting the lining segments from damage is calculated, and this ultimate strength is taken as the second strength of the energy release layer, including:

[0033] The second strength is calculated based on the inner radius of the lining segment, the outer radius of the lining segment, the second calculated radius, and the compressive strength of the lining segment material.

[0034] The formula for calculating the second intensity is:

[0035] ;

[0036] in, It is the second strength; The inner radius of the lining segment; The outer radius of the lining segment; The second calculation radius has a range of values. Different parts within the calculation range The value is ultimately selected based on the minimum value for lining different parts. Value, as the strength of the energy release layer material value; The compressive strength of the lining segment material.

[0037] Secondly, the present invention provides a system for determining the strength of the energy release layer material of a TBM segment, the system comprising:

[0038] The acquisition unit is used to acquire basic parameters, including the size parameters of the lining segments, the mechanical property parameters of the lining segments, the size parameters of the energy release layer, the mechanical property parameters of the energy release layer, the mechanical property parameters of the surrounding rock in the area where the proposed TBM tunnel is located, and the excavation radius of the proposed TBM tunnel.

[0039] The first intermediate calculation unit is used to calculate the radial displacement of the surrounding rock and the radial displacement of the lining segments based on the basic parameters; and the difference between the radial displacement of the surrounding rock and the radial displacement of the lining segments is used as the compression amount of the energy release layer.

[0040] The second intermediate calculation unit is used to determine the true thickness of the energy release layer, which is greater than the compression amount of the energy release layer.

[0041] The update unit is used to update the outer radius of the energy release layer and the radius of the excavated tunnel based on the actual thickness of the energy release layer, so as to obtain the updated outer radius of the energy release layer and the radius of the excavated tunnel.

[0042] The first strength calculation unit is used to calculate the three-dimensional constrained limit strength of the energy release layer before it can be compressed, based on the updated outer radius of the energy release layer, the radius of the excavated tunnel, and the foundation parameters, and to use the three-dimensional constrained limit strength as the first strength of the energy release layer.

[0043] The second strength calculation unit is used to calculate the ultimate strength of the energy release layer material when the lining segments are not damaged, based on the basic parameters, and to use this ultimate strength as the second strength of the energy release layer.

[0044] The final material strength determination unit is used to select the minimum value from the first strength and the second strength, and select any data that is less than the minimum value and within a preset distance range from the minimum value as the final material strength of the energy release layer.

[0045] Thirdly, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-mentioned method for determining the strength of the energy release layer material of the TBM segment.

[0046] Fourthly, the present invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for determining the strength of the energy release layer material of a TBM segment.

[0047] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0048] This invention discloses a method, system, equipment, and medium for determining the strength of the energy release layer material in TBM tunnel linings. The invention calculates the first strength (i.e., the ultimate strength of the energy release layer before compression) and the second strength (i.e., the ultimate strength before protecting the lining segments from damage) of the energy release layer by comprehensively considering factors such as the mechanical properties of the surrounding rock, the lateral pressure coefficient, the tunnel burial depth, the structural dimensions of the lining segments, and the mechanical properties of the lining segments. The final material strength of the energy release layer is determined by taking the smaller value between the first and second strengths, ensuring that the energy release layer is compressed while also preventing damage to the lining segments. This invention not only prevents the energy release layer from failing to release tunnel surrounding rock stress due to excessively high material strength, but also prevents damage to the lining structure even after compression of the energy release layer, thus maximizing the optimal energy release performance of the energy release layer. This invention is universally applicable. In the field of TBM tunnels, regardless of the ground stress, surrounding rock mass, tunnel radius, lining material, etc., this method can be used to calculate and configure the ultimate strength of the energy release layer material suitable for a specific TBM tunnel composite energy release lining segment, and is not limited to a specific TBM tunnel project. Attached Figure Description

[0049] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0050] Figure 1 This is a flowchart of the method for determining the strength of the energy release layer material of TBM segments according to the present invention;

[0051] Figure 2 To determine the first strength of the energy release layer in this invention A simplified diagram of the mechanical model calculation;

[0052] Figure 3 Determining the second strength of the energy release layer for this invention Simplified calculation diagram of the mechanical model of the middle energizer;

[0053] Figure 4 Determining the second strength of the energy release layer for this invention Simplified calculation diagram of the mechanical model for intermediate lining segments;

[0054] Figure 5 This is a structural block diagram of a system for determining the strength of an energy release layer material according to the present invention. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0056] Example 1

[0057] like Figure 1 As shown, the present invention provides a method for determining the strength of the energy release layer material of a TBM segment, the method comprising:

[0058] S1, Obtain basic parameters; basic parameters include the dimensional parameters of the lining segments, the mechanical property parameters of the lining segments, the dimensional parameters of the energy release layer, the mechanical property parameters of the energy release layer, the mechanical property parameters of the surrounding rock in the area where the proposed TBM tunnel is located, and the excavation radius of the proposed TBM tunnel.

[0059] like Figure 2 As shown, Figure 2 The first annular region inside the first circular region is the lining segment, the second annular region outside the first annular region is the energy release layer, and the region outside the energy release layer represents the surrounding rock at the tunnel.

[0060] In this embodiment, as Figure 4 As shown, the dimensional parameters of the lining segments include the inner radius of the lining segments. Outer radius of lining segments and the thickness of the lining segments ;

[0061] The mechanical property parameters of the lining segments include the elastic modulus of the lining segments. Poisson's ratio of lining segments ;

[0062] The dimensional parameters of the energy release layer include the inner radius of the energy release layer. and the proposed thickness of the energy release layer ,like Figure 3 As shown;

[0063] The mechanical properties of the energy release layer include the elastic modulus of the energy release layer material. and the Poisson ratio of the energy release layer ;

[0064] The mechanical properties of the surrounding rock in the area where the proposed TBM tunnel is located include the elastic modulus of the surrounding rock. Poisson's ratio of surrounding rock .

[0065] S2, based on the basic parameters, calculate the radial displacement of the surrounding rock and the radial displacement of the lining segments; and use the difference between the radial displacement of the surrounding rock and the radial displacement of the lining segments as the compression amount of the energy release layer;

[0066] Step S2 specifically includes:

[0067] S21. Based on the mechanical performance parameters of the lining segments, the mechanical performance parameters of the energy release layer, and the mechanical performance parameters of the surrounding rock in the area where the proposed TBM tunnel is located, calculate the first and second material constants of the surrounding rock, the energy release layer, and the lining segments.

[0068] ;in, i As a variable, take H Time represents the energy release layer, taking C The time indicates the lining segments, take W Time indicates surrounding rock; and They are respectively i Poisson's ratio and the material's elastic modulus; and They are respectively i The first material constant and the second material parameter;

[0069] S22, based on the size parameters of the lining segments, the size parameters of the energy release layer, the radius of the surrounding rock, the first material constant, and the second material constant, calculate multiple undetermined constants; In the formula, E 1 is an undetermined constant; H C The first material constant of the lining segments; I H The second material constant of the energy release layer;H H The first material constant of the energy release layer; I C This is the second material constant for the lining segments; r W The radius of the excavated tunnel; r H The inner radius of the energy release layer; r C1 The inner radius of the lining segment;

[0070] In the formula, E 2 is an undetermined constant; H C The first material constant of the lining segments; I H The second material constant of the energy release layer; H H The first material constant of the energy release layer; I C This is the second material constant for the lining segments; r W The radius of the excavated tunnel; r H The inner radius of the energy release layer; r C1 The inner radius of the lining segment;

[0071] In the formula, ω These are undetermined constants; H W The first material constant of the surrounding rock; I H The second material constant of the energy release layer; r W The radius of the excavated tunnel; r H The inner radius of the energy release layer; E 1 These are undetermined constants; H H The first material constant of the energy release layer;

[0072] In the formula, η These are undetermined constants; H W The first material constant of the surrounding rock; H H The first material constant of the energy release layer; I W This is the second material constant of the surrounding rock; r W The radius of the excavated tunnel; r HThe inner radius of the energy release layer; χ These are undetermined constants; M These are undetermined constants; E 2 These are undetermined constants;

[0073] In the formula, M These are undetermined constants; r H The inner radius of the energy release layer; I H The second material constant of the energy release layer; r W The radius of the excavated tunnel; r H The inner radius of the energy release layer;

[0074] In the formula, χ These are undetermined constants; r W The radius of the excavated tunnel; I C This is the second material constant for the lining segments; r W The radius of the excavated tunnel; r H The inner radius of the energy release layer;

[0075] In the formula, ψ These are undetermined constants; H W The first material constant of the surrounding rock; χ These are undetermined constants; M These are undetermined constants; E 2 These are undetermined constants; H H The first material constant of the energy release layer; I W This is the second material constant of the surrounding rock; r H The inner radius of the energy release layer; r W The radius of the excavated tunnel;

[0076] In the formula, α 1 is an undetermined constant; P This is ground stress; k This is the lateral pressure coefficient; ω These are undetermined constants; r H The inner radius of the energy release layer; r C1 The inner radius of the lining segment; E 1These are undetermined constants;

[0077] In the formula, α 2 is an undetermined constant; P This is ground stress; k This is the lateral pressure coefficient; ω These are undetermined constants; r H The inner radius of the energy release layer; r C1 The inner radius of the lining segment; E 1 These are undetermined constants;

[0078] In the formula, α 3 is an undetermined constant; P This is ground stress; k This is the lateral pressure coefficient; ψ These are undetermined constants; r H The inner radius of the energy release layer; r C1 The inner radius of the lining segment; E 2 These are undetermined constants;

[0079] In the formula, α 4 is an undetermined constant; P This is ground stress; k This is the lateral pressure coefficient; ψ These are undetermined constants; r H The inner radius of the energy release layer; r C1 The inner radius of the lining segment; E 2 These are undetermined constants;

[0080] In the formula, α 5 is an undetermined constant; P This is ground stress; k This is the lateral pressure coefficient; ψ These are undetermined constants; r H The inner radius of the energy release layer; r C1 The inner radius of the lining segment; E 2 These are undetermined constants;

[0081] In the formula, α 6 is an undetermined constant; P This is ground stress; k This is the lateral pressure coefficient; ψThese are undetermined constants; r H The inner radius of the energy release layer; r C1 The inner radius of the lining segment; E 2 These are undetermined constants;

[0082] In the formula, β 1. β Both 2 are undetermined constants; P This is ground stress; k This is the lateral pressure coefficient; ω These are undetermined constants; r H The inner radius of the energy release layer; r W The radius of the excavated tunnel; E 1 These are undetermined constants;

[0083] In the formula, β 3 and β 4 are all undetermined constants; P This is ground stress; k This is the lateral pressure coefficient; ψ These are undetermined constants; r H The inner radius of the energy release layer; r W The radius of the excavated tunnel; E 2 The constant coefficient is to be determined.

[0084] In step S22 above, the present invention comprehensively considers the influence of factors such as the stress field of deep rock strata, the uncertainty of rock mass conditions, and tunnel burial depth, combined with the stress field... P and lateral pressure coefficient k Calculation of parameters, including geostress. P Reflects tunnel burial depth; lateral pressure coefficient k The lateral pressure of the surrounding rock is a mechanical property parameter of the surrounding rock.

[0085] S23, Calculate the radial displacement of the surrounding rock and the radial displacement of the lining segments based on the undetermined constants; including:

[0086] According to the undetermined constant ω , η and ψ Calculate the radial displacement of the surrounding rock:

[0087] ;

[0088] in, This represents the radial displacement of the surrounding rock. θTo calculate the angle; , For the first material constant and the second material parameter of the surrounding rock;

[0089] According to the undetermined constant α 1. α 2. α 3. α 4. α 5 and α 6. Calculate the radial displacement of the lining segments:

[0090] ;

[0091] in, This refers to the radial displacement of the lining segments; To calculate the angle: , These are the first material constant and the second material parameter of the lining segment, respectively.

[0092] S24. Based on the radial displacement of the surrounding rock and the radial displacement of the lining segments, the difference between the radial displacement of the surrounding rock and the radial displacement of the lining segments is taken as the compression amount of the energy release layer.

[0093] ;

[0094] in, This represents the compression of the energy release layer.

[0095] S3, determine the true thickness of the energy release layer, which is greater than the compression of the energy release layer; that is... , This represents the actual thickness of the energy release layer.

[0096] S4. Based on the actual thickness of the energy release layer, update the outer radius of the energy release layer and the radius of the excavated tunnel to obtain the updated outer radius of the energy release layer and the radius of the excavated tunnel.

[0097] In this embodiment, the updated excavation tunnel radius is equal to the excavation tunnel radius of the proposed TBM tunnel minus the change in the energy release layer thickness, and the change in the energy release layer thickness is equal to the proposed thickness of the energy release layer minus the actual thickness of the energy release layer.

[0098] The updated outer radius of the energy release layer is equal to the updated radius of the excavated tunnel, such as... Figure 2 As shown.

[0099] S5. Based on the updated outer radius of the energy release layer, the radius of the excavated tunnel, and the foundation parameters, calculate the three-dimensional constrained limit strength of the energy release layer before it can be compressed, and take the three-dimensional constrained limit strength as the first strength of the energy release layer.

[0100] Step S5 specifically includes:

[0101] S51, based on the updated tunnel excavation radius For the undetermined constant β 1. β 2. β 3 and β 4. Update;

[0102] S52. Adopt the updated undetermined constants. β 1. β 2. β 3 and β 4. Calculate the first strength of the energy release layer. :

[0103] ;

[0104] in, It is the first strength; F It is the three-dimensional constrained limit strength; The first calculation radius, To calculate the angle, The value range is from the inner radius of the emitting layer to the outer radius of the emitting layer. The value range is 0~360 o Different parts within the calculation range The value is ultimately selected based on the minimum value at different locations within the energy release layer. Value, as the strength of the energy release layer material value; β 1. β 2. β 3 and β 4 are undetermined constants, which are based on the updated excavated tunnel radius. Calculated.

[0105] S6. Based on the basic parameters, calculate the ultimate strength of the energy release layer material when the lining segments are not damaged, and use the ultimate strength as the second strength of the energy release layer.

[0106] Step S6 specifically includes:

[0107] S61. Calculate the second strength value based on the inner radius of the lining segment, the outer radius of the lining segment, the second calculated radius, and the compressive strength of the lining segment material; ;

[0108] in, It is the second strength; The inner radius of the lining segment; The outer radius of the lining segment; The second calculation radius has a range of values. Different parts within the calculation range The value is ultimately selected based on the minimum value for lining different parts. Value, as the strength of the energy release layer material value; The compressive strength of the lining segment material.

[0109] S7. Select the minimum value from the first strength and the second strength, and select any data that is less than the minimum value and within a preset distance range from the minimum value as the final material strength of the energy release layer.

[0110] In practical implementation, it is assumed that the inner radius of the lining segments of the proposed TBM tunnel is 5.5m, the outer radius of the lining segments is 6.2m, the lining segments are made of C50 concrete, the initial proposed thickness of the energy release layer is 20cm, the ground stress P is taken as 25MPa, and the lateral pressure coefficient is... k Take 1.2 and calculate the angle. The mechanical parameters of the structural materials at 90° are shown in Table 1.

[0111] Table 1 Mechanical parameters of surrounding rock, lining, and energy release layer

[0112]

[0113] (1) Calculate the compressibility of the energy release layer Determine the following parameters:

[0114] 1) Ground stress P = 25 MPa, lateral pressure coefficient k =1.2, Proposed thickness of the energy release layer =20cm, elastic modulus of energy release layer material =141.54MPa, Poisson's ratio of the releasing layer =0.001, Excavated tunnel radius =6.4m, elastic modulus of surrounding rock =1GPa, Poisson's ratio of surrounding rock =0.4, inner radius of lining segment =5.5m, lining segment thickness =70cm, elastic modulus of lining segment material =35GPa, Poisson's ratio of lining segment material =0.2.

[0115] 2) The formulas for calculating the material constants I and H from the above parameters are as follows:

[0116] ;

[0117] in, i As a variable, take H Time represents the energy release layer, taking C The time indicates the lining segments, take W Time indicates surrounding rock; and They are respectively i Poisson's ratio and the material's elastic modulus; and They are respectively i The first material constant and the second material parameter;

[0118] Seek 、 、 、 、 、 The values ​​are: 1.4, 2.996, 2.2, 0.3571, 0.0121, and 14.5833.

[0119] 3) Substitute the material constants and structural form into the constant equations to obtain the undetermined constants. , , , M , , , , , , , , , , , , , The corresponding expression is obtained. =1.03067, =1.02721, =0.242, M= 3875507, = 3203604, = -1, = 2.0 = 5.5, = 399.5, = 0.179, = 7.716, = 50.419, = -3050, =0.7024, = 0.00030, = -0.0413, = 15.749.

[0120] 4) Based on the undetermined constants and dimensional parameters, the radial displacement of the surrounding rock and lining segments is calculated using the expressions corresponding to these displacements. = 5.96cm = 2.99cm.

[0121] 5) Compression amount Seeking = 2.97cm.

[0122] 6) Determine the true thickness of the energy release layer. The intended thickness of the energy release layer is greater than the compression of the energy release layer. Therefore, the intended thickness of the energy release layer is taken as the actual thickness of the energy release layer. =20cm.

[0123] (2) Substituting into the formula for calculating the undetermined constant, we obtain the new constant: Since the actual thickness of the energy release layer in this example... The value of 20cm remains unchanged, meaning the undetermined constant does not change.

[0124] (3) The obtained undetermined coefficients = 5.5, = 399.5, = 0.179, = 7.716, substitute to find the first strength formula , here θ Calculations can be performed on different parts of the lining circumference within a range of 0~360°. The value is based on the right wall of the tunnel lining. θ Taking 90° as an example, we can obtain... = 20.84 MPa, and finally, calculations were performed on different parts of the energy release layer. The value of is used as the strength of the energy release layer material. value.

[0125] (4) Calculate the ultimate strength of the energy release layer material to protect the lining structure from damage. Determine the following parameters:

[0126] 1) Inner radius of the lining segment =5.5m, outer radius =6.2m, compressive strength of lining segments =50MPa;

[0127] 2) Calculate the second strength: , here Pick hour The value is at its minimum at this time. =5.33MPa.

[0128] (3) Determine the ultimate strength of the energy release layer material Calculation formula: Seeking <5.33MPa.

[0129] Selecting the ultimate strength of the energy release layer material When selecting a strength of less than 5.33 MPa, it is important to note that the strength should not be too small, but close to it. This ensures that the energy release layer is compressed while also preventing damage to the lining segments, thus allowing the energy release layer to achieve its optimal energy release effect.

[0130] In summary, this invention is universally applicable. Regardless of the ground stress, surrounding rock mass, tunnel radius, lining material, etc. in the field of TBM tunnels, this method can be used to calculate and configure the strength of the energy release layer material suitable for a specific TBM tunnel, and is not limited to a specific TBM tunnel project.

[0131] Example 2

[0132] like Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that this embodiment provides a system for determining the strength of the TBM segment energy release layer material, which corresponds one-to-one with a method for determining the strength of the energy release layer material in Embodiment 1; the system includes:

[0133] The acquisition unit is used to acquire basic parameters, including the size parameters of the lining segments, the mechanical property parameters of the lining segments, the size parameters of the energy release layer, the mechanical property parameters of the energy release layer, the mechanical property parameters of the surrounding rock in the area where the proposed TBM tunnel is located, and the excavation radius of the proposed TBM tunnel.

[0134] The first intermediate calculation unit is used to calculate the radial displacement of the surrounding rock and the radial displacement of the lining segments based on the basic parameters; and the difference between the radial displacement of the surrounding rock and the radial displacement of the lining segments is used as the compression amount of the energy release layer.

[0135] The second intermediate calculation unit is used to determine the true thickness of the energy release layer, which is greater than the compression amount of the energy release layer.

[0136] The update unit is used to update the outer radius of the energy release layer and the radius of the excavated tunnel based on the actual thickness of the energy release layer, so as to obtain the updated outer radius of the energy release layer and the radius of the excavated tunnel.

[0137] The first strength calculation unit is used to calculate the three-dimensional constrained limit strength of the energy release layer before it can be compressed, based on the updated outer radius of the energy release layer, the radius of the excavated tunnel, and the foundation parameters, and to use the three-dimensional constrained limit strength as the first strength of the energy release layer.

[0138] The second strength calculation unit is used to calculate the ultimate strength of the energy release layer material when the lining segments are not damaged, based on the basic parameters, and to use this ultimate strength as the second strength of the energy release layer.

[0139] The final material strength determination unit is used to select the minimum value from the first strength and the second strength, and select any data that is less than the minimum value and within a preset distance range from the minimum value as the final material strength of the energy release layer.

[0140] The execution process of each unit can be carried out according to the steps of the method for determining the strength of an energy release layer material in Example 1, and will not be described in detail in this example.

[0141] Meanwhile, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-mentioned method for determining the strength of the energy release layer material of the TBM segment.

[0142] Meanwhile, the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-mentioned method for determining the strength of the energy release layer material of a TBM segment.

[0143] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0144] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0145] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0146] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0147] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for determining the strength of the energy release layer material in a TBM segment, characterized in that, The method includes: Obtain the basic parameters, and calculate the radial displacement of the surrounding rock and the radial displacement of the lining segments based on the basic parameters; and take the difference between the radial displacement of the surrounding rock and the radial displacement of the lining segments as the compression amount of the energy release layer; Determine the true thickness of the energy release layer, which is greater than the compression of the energy release layer; Based on the actual thickness of the energy release layer, update the outer radius of the energy release layer and the radius of the excavated tunnel to obtain the updated outer radius of the energy release layer and the radius of the excavated tunnel; Based on the updated outer radius of the energy release layer, the radius of the excavated tunnel, and the foundation parameters, the three-dimensional constrained limit strength of the energy release layer before it can be compressed is calculated, and the three-dimensional constrained limit strength is taken as the first strength of the energy release layer. Based on the basic parameters, calculate the ultimate strength of the energy release layer when it protects the lining segments from damage, and take this ultimate strength as the second strength of the energy release layer. The minimum value is selected from the first strength and the second strength, and any data that is less than the minimum value and within a preset distance from the minimum value is selected as the final material strength of the energy release layer. The formula for calculating the first intensity is: ； in, The first strength is given by F; the three-dimensional constrained limit strength is given by F. The first calculation radius, To calculate the angle, The value range is from the inner radius of the emitting layer to the outer radius of the emitting layer. The value range is 0~360 o Different parts within the calculation range The value is ultimately selected based on the minimum value at different locations within the energy release layer. Value, as the strength of the energy release layer material Values; β1, β2, β3, and β4 are undetermined constants, which are determined based on the updated excavated tunnel radius. Calculated; The formula for calculating the second intensity is: ； in, It is the second strength; The inner radius of the lining segment; The outer radius of the lining segment; The second calculation radius has a range of values. Different parts within the calculation range The value is ultimately selected based on the minimum value for lining different parts. Value, as the strength of the energy release layer material value; The compressive strength of the lining segment material.

2. The method for determining the strength of the energy release layer material of a TBM segment according to claim 1, characterized in that, The basic parameters include the dimensional parameters of the lining segments, the mechanical property parameters of the lining segments, the dimensional parameters of the energy release layer, the mechanical property parameters of the energy release layer, the mechanical property parameters of the surrounding rock in the area where the proposed TBM tunnel is located, and the excavation radius of the proposed TBM tunnel.

3. The method for determining the strength of the energy release layer material of a TBM segment according to claim 2, characterized in that, The dimensional parameters of the lining segments include the inner radius of the lining segments, the outer radius of the lining segments, and the thickness of the lining segments; The mechanical performance parameters of the lining segments include the elastic modulus and Poisson's ratio of the lining segments; The dimensional parameters of the energy release layer include the inner radius of the energy release layer and the intended thickness of the energy release layer; The mechanical performance parameters of the energy release layer include the elastic modulus of the energy release layer material and the Poisson's ratio of the energy release layer. The mechanical properties of the surrounding rock in the area where the proposed TBM tunnel is located include the elastic modulus and Poisson's ratio of the surrounding rock.

4. The method for determining the strength of the energy release layer material of a TBM segment according to claim 2, characterized in that, Based on the basic parameters, calculate the radial displacement of the surrounding rock and the radial displacement of the lining segments; The difference between the radial displacement of the surrounding rock and the radial displacement of the lining segments is taken as the compression of the energy release layer, including: Based on the mechanical property parameters of the lining segments, the mechanical property parameters of the energy release layer, and the mechanical property parameters of the surrounding rock in the area where the proposed TBM tunnel is located, the first and second material constants of the surrounding rock, the energy release layer, and the lining segments are calculated. Based on the dimensional parameters of the lining segments, the dimensional parameters of the energy release layer, the radius of the surrounding rock, the first material constant, and the second material constant, several undetermined constants are calculated; Calculate the radial displacement of the surrounding rock and the radial displacement of the lining segments based on the undetermined constants; The difference between the radial displacement of the surrounding rock and the radial displacement of the lining segments is taken as the compression amount of the energy release layer.

5. The method for determining the strength of the energy release layer material of a TBM segment according to claim 1, characterized in that, The updated outer radius of the energy release layer and the radius of the excavated tunnel include: The updated excavation tunnel radius is equal to the excavation tunnel radius of the proposed TBM tunnel minus the change in the energy release layer thickness. The change in the energy release layer thickness is equal to the proposed thickness of the energy release layer minus the actual thickness of the energy release layer. The updated outer radius of the energy release layer is equal to the updated radius of the excavated tunnel.

6. A system for determining the strength of TBM segment energy release layer material, characterized in that, The system includes: The acquisition unit is used to acquire basic parameters, including the size parameters of the lining segments, the mechanical property parameters of the lining segments, the size parameters of the energy release layer, the mechanical property parameters of the energy release layer, the mechanical property parameters of the surrounding rock in the area where the proposed TBM tunnel is located, and the excavation radius of the proposed TBM tunnel. The first intermediate calculation unit is used to calculate the radial displacement of the surrounding rock and the radial displacement of the lining segments based on the basic parameters; and the difference between the radial displacement of the surrounding rock and the radial displacement of the lining segments is used as the compression amount of the energy release layer. The second intermediate calculation unit is used to determine the true thickness of the energy release layer, which is greater than the compression amount of the energy release layer. The update unit is used to update the outer radius of the energy release layer and the radius of the excavated tunnel based on the actual thickness of the energy release layer, so as to obtain the updated outer radius of the energy release layer and the radius of the excavated tunnel. The first strength calculation unit is used to calculate the three-dimensional constrained limit strength of the energy release layer before it can be compressed, based on the updated outer radius of the energy release layer, the radius of the excavated tunnel, and the foundation parameters, and to use the three-dimensional constrained limit strength as the first strength of the energy release layer. The second strength calculation unit calculates the ultimate strength of the energy release layer when the lining segments are protected from damage based on the basic parameters, and uses this ultimate strength as the second strength of the energy release layer. The final material strength determination unit is used to select the minimum value from the first strength and the second strength, and select any data that is less than the minimum value and within a preset distance range from the minimum value as the final material strength of the energy release layer. The formula for calculating the first intensity is: ； in, The first strength is given by F; the three-dimensional constrained limit strength is given by F. The first calculation radius, To calculate the angle, The value range is from the inner radius of the emitting layer to the outer radius of the emitting layer. The value range is 0~360 o Different parts within the calculation range The value is ultimately selected based on the minimum value at different locations within the energy release layer. Value, as the strength of the energy release layer material Values; β1, β2, β3, and β4 are undetermined constants, which are determined based on the updated excavated tunnel radius. Calculated; The formula for calculating the second intensity is: ； in, It is the second strength; The inner radius of the lining segment; The outer radius of the lining segment; The second calculation radius has a range of values. Different parts within the calculation range The value is ultimately selected based on the minimum value for lining different parts. Value, as the strength of the energy release layer material value; The compressive strength of the lining segment material.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method for determining the strength of the energy release layer material of the TBM segment as described in any one of claims 1 to 5.

8. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the method for determining the strength of the energy release layer material of the TBM segment as described in any one of claims 1 to 5.

Images