Unsaturated soil humidification deformation analysis method and device considering water-force coupling

Abstract

The invention relates to the technical field of highway engineering design, in particular to an unsaturated soil humidification deformation analysis method and device considering water-force coupling, and the method comprises the steps: constructing a water-force coupling constitutive model meeting a first preset condition; performing verification processing on a unit body level and a model level of the water-force coupling constitutive model to obtain a constitutive model meeting a preset verification condition; and establishing an unsaturated slope geometric model meeting a second preset condition by using the constitutive model meeting the preset verification condition, so as to determine an analysis result of the unsaturated soil humidification deformation by using the unsaturated slope geometric model. Therefore, the problems that a certain deviation exists between an embankment slope humidification deformation simulation result and real deformation, the research cost is high, the efficiency is low and the accuracy of embankment slope deformation analysis is reduced due to the fact that the research on embankment slope humidification deformation under the rainfall condition in the prior art is mainly based on a model test are solved.

Description

Technical Field

[0001] The present application relates to the technical field of highway engineering design, and in particular to a method and device for analyzing the wetting deformation of unsaturated soil considering water-mechanical coupling. Background Art

[0002] The hydraulic and mechanical behaviors of unsaturated soil are easily affected by the external environment, such as rainfall, evaporation, and changes in the groundwater level. Among them, rainfall increases the saturation of the soil and reduces the suction; evaporation is just the opposite. The deformation, strength, and permeability of the soil are closely related to the saturation and suction.

[0003] In the related technologies, the research on embankment slope deformation under rainfall conditions is mainly based on model tests. According to the existing finite element and finite difference analysis software, the consideration of effective stress is mainly based on the Terzaghi effective stress principle, so as to analyze the specific situation of embankment slope deformation under rainfall conditions.

[0004] However, in related technologies, the research on the wetting deformation of embankment slopes under rainfall conditions is mainly based on model tests, which leads to a certain deviation between the simulation results of the wetting deformation of embankment slopes and the actual deformation. In addition, the research cost is high and the efficiency is low, which reduces the accuracy of the embankment slope deformation analysis and needs to be solved urgently. Summary of the invention

[0005] The present application provides a method and device for analyzing the wetting deformation of unsaturated soil considering water-mechanical coupling, so as to solve the problem that the research on the wetting deformation of embankment slope under rainfall conditions in the related technology is mainly based on model tests, resulting in a certain deviation between the simulation results of the wetting deformation of the embankment slope and the actual deformation, and the research cost is high and the efficiency is low, which reduces the accuracy of the deformation analysis of the embankment slope.

[0006] The first aspect of the present application provides an unsaturated soil wetting deformation analysis method considering water-mechanical coupling, comprising the following steps: constructing a water-mechanical coupling constitutive model that meets a first preset condition; performing verification processing on the unit body level and the model level of the water-mechanical coupling constitutive model to obtain a constitutive model that meets the preset verification conditions; using the constitutive model that meets the preset verification conditions to establish an unsaturated slope geometric model that meets a second preset condition, so as to use the unsaturated slope geometric model to determine the analysis result of the unsaturated soil wetting deformation.

[0007] Optionally, in one embodiment of the present application, constructing a water-mechanical coupling constitutive model that meets a first preset condition includes: updating the stress calculation formula in the initial constitutive model to obtain an updated stress calculation formula; based on the updated stress calculation formula, adjusting the calculation method of the yield equation and compression index of the initial constitutive model until the first preset condition is met, thereby generating the water-mechanical coupling constitutive model.

[0008] Optionally, in one embodiment of the present application, the unit cell level and the model level of the water-mechanical coupling constitutive model are verified to obtain a constitutive model that meets preset verification conditions, including: obtaining a first mechanical-hydraulic parameter at the unit cell level, and loading the first mechanical-hydraulic parameter using a target stress path to obtain a first loaded numerical simulation result; obtaining a second mechanical-hydraulic parameter at the model level, and loading the second mechanical-hydraulic parameter using the target stress path to obtain a second loaded numerical simulation result; and respectively verifying the first numerical simulation result and the second numerical simulation result with target test data to obtain the constitutive model that meets the preset verification conditions.

[0009] Optionally, in one embodiment of the present application, the first numerical simulation result and the second numerical simulation result are respectively verified with the target test data to obtain the constitutive model that meets the preset verification conditions, including: comparing the first numerical simulation result with the target test data to obtain a first comparison result; comparing the second numerical simulation result with the target test data to obtain a second comparison result; judging whether the first comparison result and the second comparison result both meet the preset verification criteria; if the first comparison result and the second comparison result both meet the preset verification criteria, then obtaining the constitutive model that meets the preset verification conditions according to the water-mechanical coupling constitutive model, otherwise the constitutive model that meets the preset verification conditions is not obtained.

[0010] Optionally, in one embodiment of the present application, the method of determining the analysis result of the unsaturated soil wetting deformation using the unsaturated slope geometric model includes: performing finite difference calculation on the unsaturated slope geometric model to obtain finite difference calculation results; and performing unsaturated soil wetting deformation analysis using the finite difference calculation results to obtain the analysis result of the unsaturated soil wetting deformation.

[0011] The second aspect of the present application provides an unsaturated soil wetting deformation analysis device considering water-mechanical coupling, including: a construction module, used to construct a water-mechanical coupling constitutive model that meets a first preset condition; a determination module, used to verify the unit body level and model level of the water-mechanical coupling constitutive model to obtain a constitutive model that meets the preset verification conditions; an analysis module, used to use the constitutive model that meets the preset verification conditions to establish an unsaturated slope geometric model that meets the second preset condition, so as to use the unsaturated slope geometric model to determine the analysis result of the unsaturated soil wetting deformation.

[0012] Optionally, in one embodiment of the present application, the construction module includes: a determination unit, used to update the stress calculation formula in the initial constitutive model to obtain an updated stress calculation formula; a generation unit, used to adjust the calculation method of the yield equation and compression index of the initial constitutive model based on the updated stress calculation formula until the first preset condition is met, thereby generating the water-mechanical coupling constitutive model.

[0013] Optionally, in one embodiment of the present application, the determination module includes: a first acquisition unit, used to acquire the first mechanical-hydraulic parameters at the unit body level, and load the first mechanical-hydraulic parameters using the target stress path to obtain the loaded first numerical simulation results; a second acquisition unit, used to acquire the second mechanical-hydraulic parameters at the model level, and load the second mechanical-hydraulic parameters using the target stress path to obtain the loaded second numerical simulation results; a verification unit, used to verify the first numerical simulation results and the second numerical simulation results with target test data, respectively, to obtain the constitutive model that meets the preset verification conditions.

[0014] Optionally, in one embodiment of the present application, the verification unit includes: a first comparison subunit, used to compare the first numerical simulation result with the target test data to obtain a first comparison result; a second comparison subunit, used to compare the second numerical simulation result with the target test data to obtain a second comparison result; a judgment subunit, used to judge whether the first comparison result and the second comparison result both meet the preset verification criteria; a processing subunit, used to obtain the constitutive model that meets the preset verification conditions according to the water-mechanical coupling constitutive model if the first comparison result and the second comparison result both meet the preset verification criteria, otherwise the constitutive model that meets the preset verification conditions is not obtained.

[0015] Optionally, in one embodiment of the present application, the analysis module includes: a calculation unit, used to perform finite difference calculation on the unsaturated slope geometric model to obtain a finite difference calculation result; and a third acquisition unit, used to perform unsaturated soil wetting deformation analysis using the finite difference calculation result to obtain an analysis result of the unsaturated soil wetting deformation.

[0016] A third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the unsaturated soil wetting deformation analysis method considering water-mechanical coupling as described in the above embodiment.

[0017] The fourth aspect of the present application provides a computer-readable storage medium, which stores a computer program. When the program is executed by a processor, it implements the above-mentioned unsaturated soil wetting deformation analysis method considering water-mechanical coupling.

[0018] The fifth aspect of the present application provides a computer program product, including a computer program, which, when executed, is used to implement the above-mentioned unsaturated soil wetting deformation analysis method considering water-mechanical coupling.

[0019] The embodiment of the present application can verify the unit level and model level of the water-mechanical coupling constitutive model that meets the first preset condition, obtain the constitutive model that meets the verification condition, and then establish the unsaturated slope geometry model that meets the second preset condition, so as to use the unsaturated slope geometry model to determine the analysis results of the unsaturated soil wetting deformation, effectively reduce the research cost, and improve the accuracy of the embankment slope deformation analysis. Thus, it solves the problem that the research on the wetting deformation of the embankment slope under rainfall conditions in the related technology is mainly based on model tests, resulting in a certain deviation between the simulation results of the wetting deformation of the embankment slope and the actual deformation, and the research cost is high and the efficiency is low, which reduces the accuracy of the embankment slope deformation analysis.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1 A flowchart of a method for analyzing unsaturated soil wetting deformation considering water-mechanical coupling provided according to an embodiment of the present application;

[0023] Figure 2 A schematic diagram of the calculation relationship of the water-mechanical coupling constitutive model of a specific embodiment of the present application;

[0024] Figure 3 A schematic diagram of the dimensions and boundary conditions of an unsaturated slope geometric model of a specific embodiment of the present application;

[0025] Figure 4 A flowchart of a method for analyzing the wetting deformation of unsaturated soil considering water-mechanical coupling according to a specific embodiment of the present application;

[0026] Figure 5 It is a structural schematic diagram of an unsaturated soil wetting deformation analysis device considering water-mechanical coupling provided according to an embodiment of the present application;

[0027] Figure 6 It is a schematic diagram of the structure of an electronic device provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0029] The following describes the unsaturated soil wetting deformation analysis method and device considering water-mechanical coupling of the embodiment of the present application with reference to the accompanying drawings. In view of the problem that the research on the wetting deformation of the embankment slope under rainfall conditions in the related art mentioned in the above background technology is mainly based on model tests, resulting in a certain deviation between the simulation results of the wetting deformation of the embankment slope and the actual deformation, and the research cost is high and the efficiency is low, which reduces the accuracy of the deformation analysis of the embankment slope, the present application provides an unsaturated soil wetting deformation analysis method considering water-mechanical coupling, in which the unit body level and the model level of the water-mechanical coupling constitutive model that meets the first preset condition can be verified and processed to obtain a constitutive model that meets the verification condition, and then an unsaturated slope geometric model that meets the second preset condition is established, so as to use the unsaturated slope geometric model to determine the analysis result of the wetting deformation of the unsaturated soil, effectively reduce the research cost, and improve the accuracy of the deformation analysis of the embankment slope. Thus, the problem that the research on the wetting deformation of the embankment slope under rainfall conditions in the related art is mainly based on model tests, resulting in a certain deviation between the simulation results of the wetting deformation of the embankment slope and the actual deformation, and the research cost is high and the efficiency is low, which reduces the accuracy of the deformation analysis of the embankment slope.

[0030] Specifically, Figure 1 A flow chart of a method for analyzing the wetting deformation of unsaturated soil considering water-mechanical coupling provided in an embodiment of the present application.

[0031] like Figure 1 As shown in the figure, the unsaturated soil wetting deformation analysis method considering water-mechanical coupling includes the following steps:

[0032] In step S101, a water-mechanical coupling constitutive model that meets a first preset condition is constructed.

[0033] In the embodiment of the present application, the first preset condition is a condition under which the wetting deformation of unsaturated soil can be analyzed after the initial constitutive model is modified.

[0034] It can be understood that the embodiment of the present application can construct a water-mechanical coupling constitutive model that meets the first preset condition in the following steps. For example, in the embodiment of the present application, certain codes of the original Cam-Clay model in FLAC (Fast Lagrangian Analysis of Continuum) can be used to supplement it. The influence of suction is considered in the initial constitutive model in the following steps. The built-in Two-Phase Flow function in FLAC is used to replace the stress mode with the Bishop effective stress mode. The calculation of the yield equation and the compression index is modified, and the modified water-mechanical coupling constitutive model is compiled based on a certain environment, wherein the compilation environment is set by relevant technical personnel and is not specifically limited here, which effectively improves the feasibility of analyzing the wetting deformation of unsaturated soil.

[0035] Among them, in one embodiment of the present application, a water-mechanical coupling constitutive model that meets the first preset condition is constructed, including: updating the stress calculation formula in the initial constitutive model to obtain an updated stress calculation formula; based on the updated stress calculation formula, adjusting the yield equation and the calculation method of the compression index of the initial constitutive model until the first preset condition is met, thereby generating a water-mechanical coupling constitutive model.

[0036] For example, Figure 2 As shown, the embodiment of the present application can use the built-in Two-Phase Flow function of FLAC to switch the stress mode to the Bishop effective stress mode, and the formula is:

[0037] p′=p-μ a +S r s (1)

[0038] Where p is the average total stress, u a is the pore gas pressure, S r is the saturation and s is the suction.

[0039] Among them, the LC (loading collapse) yield line expression under isotropic stress state is:

[0040]

[0041] Among them, p' 0y and p' y Corresponding to the effective yield stress of soil under saturated state and suction s respectively; p' nis the effective stress without deformation when the suction decreases, that is, the average effective stress corresponding to the intersection of soil compression curves under different suctions; κ is the rebound index of the soil; λ(0) and λ(s) correspond to the slopes of the normal consolidation line under saturation and when the suction is s, respectively.

[0042] Among them, the calculation formula of the normal consolidation line slope λ(s) when the suction is s is:

[0043]

[0044] Among them, p a is the standard atmospheric pressure; s is a material parameter used to control the slope of the normal consolidation line as suction changes.

[0045] Secondly, the yield function f and the potential function g are in the form of the modified Cambridge model, and the Bishop effective pressure is used to replace the effective pressure under saturated soil conditions. The expression is as follows:

[0046] f=g=q 2 +M 2 p′(p′-p′ y )=0 (4)

[0047] Where M is the slope of the critical state line; q is the deviatoric stress.

[0048] Elastic volume strain dε of the initial constitutive model v e and plastic volume strain dε v p The following formula is used for calculation, namely:

[0049]

[0050] Among them, e is the current void ratio, K is the bulk modulus, dε v e is the elastic volume strain, dε v p is the plastic volume strain.

[0051] Again, the specific volume v is updated according to the total volume strain, and the specific volume is related to the void ratio as follows:

[0052] v new =v old (1-dε v ) (7)

[0053] v=1+e (8)

[0054] Among them, v is the specific volume, e is the current porosity, dε is v is the total volume strain, vold is the specific volume of the previous step, v new is the specific volume of the new step.

[0055] Furthermore, if Figure 2 As shown, in the embodiment of the present application, a function related to the void ratio and the air intake value can be established, and the void ratio of each unit can be called by the Fish function. The function expression is as follows:

[0056] 1 / α=-Ae+B (9)

[0057] Among them, A and B are fitting parameters, and 1 / α is the intake value.

[0058] Next, the embodiment of the present application can use the porosity ratio of each unit obtained above to assign and update the hydraulic parameters of each unit body, and the vG model is selected to describe the soil-water characteristic curve, which is in the following form:

[0059]

[0060] Wherein, 1 / α is the intake value; m and n are fitting parameters, and it is assumed that m=1-1 / n.

[0061] Therefore, the embodiment of the present application can modify the initial constitutive model to generate a water-mechanical coupling constitutive model, which effectively improves the feasibility of analyzing the wetting deformation of unsaturated soil.

[0062] In step S102, the unit cell level and the model level of the hydraulic-mechanical coupling constitutive model are verified to obtain a constitutive model that meets preset verification conditions.

[0063] In the embodiment of the present application, the preset verification condition is satisfied when the numerical simulation results of the water-mechanical coupling constitutive model are consistent with the experimental data verification.

[0064] It can be understood that the embodiment of the present application can verify the unit level and model level of the water-mechanical coupling constitutive model in the following steps, that is, the numerical simulation results of the water-mechanical coupling constitutive model can be compared with the test data. When the numerical simulation results of the water-mechanical coupling constitutive model are consistent with the test data, it can be determined that the water-mechanical coupling constitutive model meets the verification conditions, that is, the constitutive model that meets the preset verification conditions is obtained, which effectively improves the accuracy of the unsaturated soil wetting deformation analysis.

[0065] Among them, in one embodiment of the present application, the unit body level and the model level of the water-mechanical coupling constitutive model are verified and processed to obtain a constitutive model that meets the preset verification conditions, including: obtaining the first mechanical-hydraulic parameter at the unit body level, and loading the first mechanical-hydraulic parameter using the target stress path to obtain a first numerical simulation result of the loading; obtaining the second mechanical-hydraulic parameter at the model level, and loading the second mechanical-hydraulic parameter using the target stress path to obtain a second numerical simulation result of the loading; and respectively verifying the first numerical simulation result and the second numerical simulation result with the target test data to obtain a constitutive model that meets the preset verification conditions.

[0066] For example, the embodiment of the present application can load the water-mechanical coupling constitutive model in FLAC, and can assign the initial mechanical-hydraulic parameters of the nodes and regions at the unit level of the water-mechanical coupling constitutive model to obtain the first mechanical-hydraulic parameters at the unit level, and use the stress path of the experiment to load the first mechanical-hydraulic parameters to obtain the first numerical simulation result of the loading; then, the initial mechanical-hydraulic parameters at the model level of the water-mechanical coupling constitutive model can also be assigned to obtain the second mechanical-hydraulic parameters at the model level, and use the stress path of the experiment to load the second mechanical-hydraulic parameters to obtain the second numerical simulation result of the loading, so that the embodiment of the present application can extract numerical simulation data such as displacement, stress, and pore pressure from the simulation, and respectively verify the first numerical simulation results and the second numerical simulation results in the following steps with the target test data to verify the accuracy of the model, thereby obtaining a constitutive model that meets the verification conditions, effectively improving the accuracy of the wetting deformation analysis of unsaturated soil.

[0067] Among them, the embodiment of the present application can realize the corresponding stress path loading test simulation in FLAC through stress and strain control, and compare the test results with the simulation results to verify the embedded constitutive model.

[0068] Optionally, in one embodiment of the present application, the first numerical simulation result and the second numerical simulation result are respectively verified with the target test data to obtain a constitutive model that meets preset verification conditions, including: comparing the first numerical simulation result with the target test data to obtain a first comparison result; comparing the second numerical simulation result with the target test data to obtain a second comparison result; judging whether both the first comparison result and the second comparison result meet the preset verification criteria; if both the first comparison result and the second comparison result meet the preset verification criteria, then obtaining a constitutive model that meets the preset verification conditions according to the water-mechanical coupling constitutive model, otherwise not obtaining a constitutive model that meets the preset verification conditions.

[0069] For example, the embodiment of the present application can perform finite difference calculation on the first mechanical-hydraulic parameter at the unit body level to obtain a first numerical simulation result, and compare the first numerical simulation result with known experimental data or theoretical predictions, such as displacement, stress, pore pressure, etc., to obtain a first comparison result; in addition, finite difference calculation can be performed on the second mechanical-hydraulic parameter at the model level to obtain a second numerical simulation result, and compare the second numerical simulation result with known experimental data or theoretical predictions to obtain a second comparison result; and when both the first comparison result and the second comparison result meet the verification criteria, that is, the difference between the simulation result and the test data is within the range allowed by a certain standard, the model verification is considered to be successful, then a constitutive model that meets the verification conditions is obtained according to the water-mechanical coupling constitutive model, otherwise a constitutive model that meets the verification conditions is not obtained, such as, if the difference between the simulation result and the test data exceeds the allowable range of a certain standard, it is necessary to review the assumptions and parameter settings of the model, and adjust the model, thereby effectively improving the accuracy of the wetting deformation analysis of unsaturated soil.

[0070] In step S103, an unsaturated slope geometric model that meets the second preset condition is established using the constitutive model that meets the preset verification condition, so as to determine the analysis result of the unsaturated soil wetting deformation using the unsaturated slope geometric model.

[0071] In the embodiment of the present application, satisfying the second preset condition is a condition for assigning hydraulic and mechanical parameters to the unsaturated slope geometric model.

[0072] It can be understood that the embodiment of the present application can use the constitutive model that meets the verification conditions to establish an unsaturated slope geometric model that meets the second preset condition. For example, the embodiment of the present application can use the constitutive model that meets the verification conditions to simulate the unsaturated embankment filling material and assign hydraulic and mechanical parameters to the material, so as to simulate the wetting deformation process of the unsaturated embankment filling material, perform a mechanical analysis of the wetting deformation of the unsaturated embankment under rainfall, and then obtain the analysis results of the wetting deformation of the unsaturated soil, effectively reducing the research cost and improving the accuracy of the embankment slope deformation analysis.

[0073] Among them, the Mohr-Coulomb constitutive model is selected for the foundation, and the density, elastic modulus, Poisson's ratio, internal friction angle and cohesion of the material are input; the embankment adopts the verified unsaturated soil water-mechanical coupling constitutive model, and the density of the material, the slope of the saturated state compression curve, the slope of the rebound curve, the slope of the critical state line, the initial specific volume, the standard atmospheric pressure, the Poisson's ratio and the effective stress without deformation when the suction decreases are input; the hydraulic parameters include initial saturation, permeability coefficient and air intake value.

[0074] Among them, in one embodiment of the present application, the unsaturated slope geometric model is used to determine the analysis results of the unsaturated soil wetting deformation: including: performing finite difference calculation on the unsaturated slope geometric model to obtain finite difference calculation results; using the finite difference calculation results to perform unsaturated soil wetting deformation analysis to obtain the analysis results of the unsaturated soil wetting deformation.

[0075] For example, the embodiment of the present application can perform finite difference analysis and calculation on the unsaturated slope geometric model, and then subdivide the grid for re-analysis and calculation, that is, perform sensitivity analysis on the grid size when dividing the grid, and screen out the model whose calculation results no longer change with the grid as the final unsaturated slope geometric model. Specifically, the embodiment of the present application can set boundary conditions for the unsaturated slope geometric model that is assigned material and unit attributes and divided into grids, wherein the set boundary conditions are: setting the vertical and horizontal displacements of the bottom edge of the model and the horizontal displacement of the side edge of the model through the fix command, and then setting the seepage boundary conditions of the model through the fix seepage command. Under the above conditions, the unsaturated slope geometric model is subjected to finite difference calculation, and the calculation results of the top surface settlement of the unsaturated slope geometric model and the lateral displacement of the slope fracture surface are extracted from the finite difference calculation results, thereby simulating the wetting deformation process of the unsaturated embankment filler, and effectively improving the comprehensiveness of the analysis of the wetting deformation of unsaturated soil.

[0076] It can be seen from this that the embodiment of the present application can embed the constitutive model related to unsaturated soil in the existing software through secondary development, that is, the unsaturated soil constitutive model considering the suction effect is added to the finite difference program, filling the gap that the wetting deformation cannot be accurately considered in the finite difference analysis of unsaturated embankments, and can more accurately simulate the water-mechanical coupling characteristics of unsaturated soil, and study engineering problems related to the wetting deformation of unsaturated embankments.

[0077] For example, Figure 3 As shown, the embodiment of the present application can extract the design geometric parameters: the slope height is selected as 6m, the top surface width is 8m, and the slope ratio is selected as 1:1.5 (vertical to horizontal); the foundation soil thickness is selected as 6m, and the total width is set to 30m; according to the extracted geometric parameters, the FLAC finite difference software is used to establish the following Figure 3 The unsaturated slope geometry model of the model size diagram and boundary conditions; then, in the embodiment of the present application, when setting the boundary conditions and rainfall conditions, the horizontal displacement of the model side constraints and the vertical displacement of the model bottom constraints can be set; the rainfall conditions are applied to the embankment and the top of the foundation through the apply discharge command, and then, a loop calculation statement is established using the Fish language to update the hydraulic parameters every 1000 steps. After multiple loop calculations, the slope reaches a saturated state, thereby obtaining the analysis results of the unsaturated soil wetting deformation and improving the accuracy of the simulation results.

[0078] For example, Figure 4 As shown, the working principle of the embodiment of the present application is described in detail in the following specific embodiment.

[0079] Step S401: constructing a water-mechanical coupling constitutive model that meets the first preset condition.

[0080] Step S402: verifying the unit cell level and the model level of the hydraulic-mechanical coupling constitutive model that meets the first preset condition.

[0081] Step S403: Determine whether the numerical simulation result is consistent with the target test data. When the numerical simulation result is consistent with the target test data, execute step S404; otherwise, execute step S402.

[0082] Step S404: Establish an unsaturated slope geometry model using the constitutive model that meets the verification conditions, and set hydraulic and mechanical parameters.

[0083] Step S405: Mechanical analysis of the wetting deformation of the unsaturated slope under rainfall, that is, the embodiment of the present application can simulate the wetting deformation process of the unsaturated embankment filling, effectively improving the comprehensiveness and accuracy of the analysis of the wetting deformation of the unsaturated soil.

[0084] According to the unsaturated soil wetting deformation analysis method considering water-mechanical coupling proposed in the embodiment of the present application, the unit body level and the model level of the water-mechanical coupling constitutive model that meets the first preset condition can be verified and processed to obtain a constitutive model that meets the verification condition, and then an unsaturated slope geometric model that meets the second preset condition is established, so as to use the unsaturated slope geometric model to determine the analysis results of the unsaturated soil wetting deformation, effectively reduce the research cost, and improve the accuracy of the embankment slope deformation analysis. Thus, the problem that the research on the wetting deformation of the embankment slope under rainfall conditions in the related technology is mainly based on model tests, resulting in a certain deviation between the simulation results of the wetting deformation of the embankment slope and the actual deformation, and the research cost is high and the efficiency is low, which reduces the accuracy of the embankment slope deformation analysis.

[0085] Next, an unsaturated soil wetting deformation analysis device considering water-mechanical coupling proposed in an embodiment of the present application is described with reference to the accompanying drawings.

[0086] Figure 5 It is a block diagram of an unsaturated soil wetting deformation analysis device considering water-mechanical coupling according to an embodiment of the present application.

[0087] like Figure 5 As shown, the unsaturated soil wetting deformation analysis device 10 considering water-mechanical coupling includes: a construction module 100, a determination module 200 and an analysis module 300.

[0088] Specifically, the construction module 100 is used to construct a water-mechanical coupling constitutive model that meets the first preset condition.

[0089] The determination module 200 is used to verify the unit level and model level of the water-mechanical coupling constitutive model to obtain a constitutive model that meets preset verification conditions.

[0090] The analysis module 300 is used to establish an unsaturated slope geometric model that meets a second preset condition using the constitutive model that meets the preset verification condition, so as to determine the analysis result of the unsaturated soil wetting deformation using the unsaturated slope geometric model.

[0091] Optionally, in one embodiment of the present application, the construction module 100 includes: a determination unit and a generation unit.

[0092] The determination unit is used to update the stress calculation formula in the initial constitutive model to obtain an updated stress calculation formula.

[0093] The generation unit is used to adjust the yield equation and the calculation method of the compression index of the initial constitutive model based on the updated stress calculation formula until the first preset condition is met, thereby generating a water-mechanical coupling constitutive model.

[0094] Optionally, in one embodiment of the present application, the determination module 200 includes: a first acquisition unit, a second acquisition unit and a verification unit.

[0095] The first acquisition unit is used to acquire the first mechanical-hydraulic parameters at the unit body level, and load the first mechanical-hydraulic parameters using the target stress path to obtain a first numerical simulation result of the loading.

[0096] The second acquisition unit is used to acquire the second mechanical-hydraulic parameters at the model level, and load the second mechanical-hydraulic parameters using the target stress path to obtain a second numerical simulation result of the loading.

[0097] The verification unit is used to verify the first numerical simulation result and the second numerical simulation result with the target test data respectively to obtain a constitutive model that meets the preset verification conditions.

[0098] Optionally, in one embodiment of the present application, the verification unit includes: a first comparison subunit, a second comparison subunit, a judgment subunit and a processing subunit.

[0099] The first comparison subunit is used to compare the first numerical simulation result with the target test data to obtain a first comparison result.

[0100] The second comparison subunit is used to compare the second numerical simulation result with the target test data to obtain a second comparison result.

[0101] The judging subunit is used to judge whether the first comparison result and the second comparison result both meet a preset verification standard.

[0102] The processing subunit is used to obtain a constitutive model that meets the preset verification conditions according to the water-mechanical coupling constitutive model if both the first comparison result and the second comparison result meet the preset verification criteria, otherwise, the constitutive model that meets the preset verification conditions is not obtained.

[0103] Optionally, in one embodiment of the present application, the analysis module 300 includes: a calculation unit and a third acquisition unit.

[0104] The calculation unit is used to perform finite difference calculation on the unsaturated slope geometric model to obtain finite difference calculation results.

[0105] The third acquisition unit is used to perform unsaturated soil wetting deformation analysis using finite difference calculation results to obtain analysis results of unsaturated soil wetting deformation.

[0106] It should be noted that the above explanation of the embodiment of the unsaturated soil wetting deformation analysis method considering water-mechanical coupling is also applicable to the unsaturated soil wetting deformation analysis device considering water-mechanical coupling of this embodiment, and will not be repeated here.

[0107] According to the unsaturated soil wetting deformation analysis device considering water-mechanical coupling proposed in the embodiment of the present application, the unit body level and the model level of the water-mechanical coupling constitutive model that meets the first preset condition can be verified and processed to obtain a constitutive model that meets the verification condition, and then an unsaturated slope geometric model that meets the second preset condition is established, so as to use the unsaturated slope geometric model to determine the analysis results of the unsaturated soil wetting deformation, effectively reduce the research cost, and improve the accuracy of the embankment slope deformation analysis. Thus, the problem that the research on the wetting deformation of the embankment slope under rainfall conditions in the related technology is mainly based on model tests, resulting in a certain deviation between the simulation results of the wetting deformation of the embankment slope and the actual deformation, and the research cost is high and the efficiency is low, which reduces the accuracy of the embankment slope deformation analysis.

[0108] Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device may include:

[0109] A memory 601 , a processor 602 , and a computer program stored in the memory 601 and executable on the processor 602 .

[0110] When the processor 602 executes the program, the unsaturated soil wetting deformation analysis method considering water-mechanical coupling provided in the above embodiment is implemented.

[0111] Furthermore, the electronic device further comprises:

[0112] The communication interface 603 is used for communication between the memory 601 and the processor 602 .

[0113] The memory 601 is used to store computer programs that can be executed on the processor 602 .

[0114] The memory 601 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0115] If the memory 601, the processor 602 and the communication interface 603 are implemented independently, the communication interface 603, the memory 601 and the processor 602 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 6 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0116] Optionally, in a specific implementation, if the memory 601, the processor 602 and the communication interface 603 are integrated on a chip, the memory 601, the processor 602 and the communication interface 603 can communicate with each other through an internal interface.

[0117] The processor 602 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0118] This embodiment also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the above-mentioned unsaturated soil wetting deformation analysis method considering water-mechanical coupling is implemented.

[0119] This embodiment also provides a computer program product, including a computer program. When the computer program is executed, it is used to implement the above unsaturated soil wetting deformation analysis method considering water-mechanical coupling.

[0120] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0121] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0122] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0123] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways as necessary and then storing it in a computer memory.

[0124] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one or a combination of the following technologies known in the art: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0125] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0126] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0127] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for analyzing the wetting deformation of unsaturated soil considering water-mechanical coupling, characterized in that: The following steps are involved: Constructing a water-mechanical coupling constitutive model that meets the first preset condition; Performing verification processing on the unit body level and the model level of the water-mechanical coupling constitutive model to obtain a constitutive model that meets preset verification conditions; The constitutive model that meets the preset verification condition is used to establish an unsaturated slope geometric model that meets the second preset condition, so as to determine the analysis result of the unsaturated soil wetting deformation using the unsaturated slope geometric model.

2. The method according to claim 1, characterized in that The constructing of a water-mechanical coupling constitutive model that meets the first preset condition includes: Updating the stress calculation formula in the initial constitutive model to obtain an updated stress calculation formula; Based on the updated stress calculation formula, the yield equation and the calculation method of the compression index of the initial constitutive model are adjusted until the first preset condition is met, and the water-mechanical coupling constitutive model is generated.

3. The method according to claim 1, characterized in that The verification process is performed on the unit level and the model level of the water-mechanical coupling constitutive model to obtain a constitutive model that meets the preset verification conditions, including: Acquiring first mechanical-hydraulic parameters at the unit body level, and loading the first mechanical-hydraulic parameters using a target stress path to obtain a first numerical simulation result of the loading; Acquiring a second mechanical-hydraulic parameter at the model level, and loading the second mechanical-hydraulic parameter using the target stress path to obtain a second numerical simulation result of the loading; The first numerical simulation result and the second numerical simulation result are respectively verified with target test data to obtain the constitutive model that meets the preset verification conditions.

4. The method according to claim 3, characterized in that The first numerical simulation result and the second numerical simulation result are respectively verified with target test data to obtain the constitutive model that meets the preset verification conditions, including: Comparing the first numerical simulation result with target test data to obtain a first comparison result; Comparing the second numerical simulation result with the target test data to obtain a second comparison result; Determining whether both the first comparison result and the second comparison result meet a preset verification standard; If both the first comparison result and the second comparison result meet the preset verification criteria, the constitutive model meeting the preset verification conditions is obtained according to the water-mechanical coupling constitutive model; otherwise, the constitutive model meeting the preset verification conditions is not obtained.

5. The method according to claim 1, characterized in that The analysis results of determining the unsaturated soil wetting deformation using the unsaturated slope geometric model include: Performing finite difference calculation on the unsaturated slope geometric model to obtain finite difference calculation results; The finite difference calculation result is used to perform unsaturated soil wetting deformation analysis to obtain the analysis result of the unsaturated soil wetting deformation.

6. An unsaturated soil wetting deformation analysis device considering water-mechanical coupling, characterized in that: include: A construction module, used to construct a water-mechanical coupling constitutive model that meets the first preset condition; A determination module is used to verify the unit level and model level of the water-mechanical coupling constitutive model to obtain a constitutive model that meets preset verification conditions; The analysis module is used to establish an unsaturated slope geometric model that meets the second preset condition by using the constitutive model that meets the preset verification condition, so as to determine the analysis result of the unsaturated soil wetting deformation by using the unsaturated slope geometric model.

7. The device according to claim 6, characterized in that The building blocks include: Determine a unit for updating a stress calculation formula in an initial constitutive model to obtain an updated stress calculation formula; A generating unit is used to adjust the calculation method of the yield equation and the compression index of the initial constitutive model based on the updated stress calculation formula until the first preset condition is met, thereby generating the water-mechanical coupling constitutive model.

8. The device according to claim 6, characterized in that The determination module comprises: A first acquisition unit is used to acquire a first mechanical-hydraulic parameter at the unit body level, and load the first mechanical-hydraulic parameter using a target stress path to obtain a first numerical simulation result of the loading; A second acquisition unit is used to acquire a second mechanical-hydraulic parameter at the model level, and load the second mechanical-hydraulic parameter using the target stress path to obtain a loaded second numerical simulation result; A verification unit is used to verify the first numerical simulation result and the second numerical simulation result with target test data respectively, so as to obtain the constitutive model that meets the preset verification conditions.

9. The device according to claim 8, characterized in that The verification unit comprises: A first comparison subunit, used for comparing the first numerical simulation result with target test data to obtain a first comparison result; A second comparison subunit, used for comparing the second numerical simulation result with the target test data to obtain a second comparison result; A judging subunit, used to judge whether both the first comparison result and the second comparison result meet a preset verification standard; A processing subunit is used to obtain the constitutive model that meets the preset verification conditions according to the water-mechanical coupling constitutive model if both the first comparison result and the second comparison result meet the preset verification criteria, otherwise the constitutive model that meets the preset verification conditions is not obtained.

10. The device according to claim 6, characterized in that The analysis module comprises: A calculation unit, used for performing finite difference calculation on the unsaturated slope geometric model to obtain a finite difference calculation result; The third acquisition unit is used to perform unsaturated soil wetting deformation analysis using the finite difference calculation result to obtain the analysis result of the unsaturated soil wetting deformation.

11. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the unsaturated soil wetting deformation analysis method considering water-mechanical coupling as described in any one of claims 1 to 5.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the unsaturated soil wetting deformation analysis method considering water-mechanical coupling as described in any one of claims 1 to 5.

13. A computer program product, comprising a computer program, characterized in that The computer program is executed by a processor to implement the unsaturated soil wetting deformation analysis method considering water-mechanical coupling as described in any one of claims 1 to 5.

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