Method, device, medium and electronic equipment for evaluating roadbed stability in seasonally frozen soil areas

Abstract

The method, device, medium and electronic equipment for evaluating the stability of roadbed in seasonal frozen soil areas provided by the present invention mainly relate to the field of geotechnical and roadbed engineering technology. The method comprises: obtaining indoor cyclic dynamic triaxial test data of freeze-thaw samples of roadbed fill on site; collecting test parameters required for the schematic diagram according to the indoor cyclic dynamic triaxial test data of freeze-thaw samples of roadbed fill on site; obtaining a schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles and the schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles according to the required test parameters; evaluating the stability of the roadbed in seasonal frozen soil areas according to the schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles and the schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles. The device, medium and electronic equipment can be used to implement the method. It takes into account the coupling of freeze-thaw and dynamic loads and is closer to the on-site working conditions.

Description

Technical Field

[0001] The invention relates to the technical field of rock soil and roadbed engineering, and in particular to a method, a device, a medium and an electronic device for evaluating roadbed stability in seasonally frozen soil areas. Background Art

[0002] When the soil temperature is below 0℃, part of the water in the soil freezes into ice. At this time, the soil volume expands, resulting in soil frost heave. There are vast seasonal frozen soil areas in Northeast and Northwest China, and there are permafrost areas of about 1.85 to 1.9 million square kilometers in the northern part of Greater and Lesser Khingan Mountains, the Qinghai-Tibet Plateau, and the Tianshan and Altai Mountains. How to evaluate and deal with the frost damage caused by frozen soil and ensure the long-term service performance of the roadbed is an inevitable key issue. Summary of the invention

[0003] In view of this, the present invention provides a method, device, medium and electronic equipment for evaluating roadbed stability in seasonally frozen areas, which takes into account the coupling of freeze-thaw and dynamic loads, is closer to on-site working conditions, and is therefore more suitable for practical use.

[0004] In order to achieve the first objective above, the technical solution of the method for evaluating roadbed stability in seasonally frozen soil areas provided by the present invention is as follows:

[0005] The method for evaluating roadbed stability in seasonally frozen soil areas provided by the present invention comprises the following steps:

[0006] Obtain indoor cyclic dynamic triaxial test data of on-site roadbed fill freeze-thaw samples;

[0007] According to the indoor cyclic dynamic triaxial test data of the on-site roadbed fill freeze-thaw sample, the test parameters required for the schematic diagram are collected;

[0008] According to the required test parameters, a schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles and a schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles are obtained on the coordinate system;

[0009] According to the relationship diagram of the dynamic rebound modulus and the number of freeze-thaw cycles and the relationship diagram of the cumulative plastic strain and the number of freeze-thaw cycles, the functional relationship between the dynamic rebound modulus and the cumulative plastic strain is obtained to evaluate the stability of the roadbed in seasonally frozen areas.

[0010] The method for evaluating roadbed stability in seasonally frozen soil areas provided by the present invention can also be further implemented by adopting the following technical measures.

[0011] Preferably, the functional relationship between the dynamic modulus of elasticity and the cumulative plastic strain is obtained according to the schematic diagram of the relationship between the dynamic modulus of elasticity and the number of freeze-thaw cycles and the schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles, and the evaluation of the stability of the roadbed in the seasonal frozen soil area specifically includes the following steps:

[0012] According to the schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles and the schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles, a schematic diagram of the relationship between the dynamic rebound modulus and the cumulative plastic strain is obtained;

[0013] According to the schematic diagram of the relationship between the dynamic elastic modulus and the accumulated plastic strain, the fitting curve is obtained;

[0014] According to the fitting curve, a functional relationship between the dynamic rebound modulus and the accumulated plastic strain is obtained to evaluate the stability of the roadbed in the seasonally frozen soil area.

[0015] Preferably, the functional relationship between the dynamic modulus of elasticity and the cumulative plastic strain is obtained according to the schematic diagram of the relationship between the dynamic modulus of elasticity and the number of freeze-thaw cycles and the schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles, and the evaluation of the stability of the roadbed in the seasonal frozen soil area specifically includes the following steps:

[0016] According to the relationship diagram of dynamic elastic modulus with respect to the number of freeze-thaw cycles, the functional relationship between dynamic elastic modulus and the number of freeze-thaw cycles was fitted;

[0017] According to the diagram of the relationship between the plastic strain and the number of freeze-thaw cycles, the functional relationship between the plastic strain and the number of freeze-thaw cycles is obtained by fitting;

[0018] According to the functional relationship between the dynamic rebound modulus and the number of freeze-thaw cycles, and the functional relationship between the plastic strain and the number of freeze-thaw cycles, the functional relationship between the dynamic rebound modulus and the accumulated plastic strain is obtained to evaluate the stability of the roadbed in seasonally frozen areas.

[0019] Preferably, in the step of obtaining the required test parameters based on the indoor cyclic dynamic triaxial test data of the on-site roadbed fill freeze-thaw sample, the required test parameters include the number of freeze-thaw cycles, confining pressure, dynamic stress, loading frequency, initial moisture content, and initial compaction degree.

[0020] Preferably, according to the required test parameters, in the steps of obtaining a schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles and a schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles on a coordinate system, the horizontal coordinate of the schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles is the number of freeze-thaw cycles, the vertical coordinate of the schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles is the dynamic rebound modulus, and the schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles includes a scatter plot under set deviatoric stress conditions, and a curve graph obtained by fitting the scatter plot under the set deviatoric stress conditions.

[0021] Preferably, according to the required test parameters, in the steps of obtaining a schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles and a schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles on a coordinate system, the horizontal coordinate of the schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles is the number of freeze-thaw cycles, the vertical coordinate of the schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles is the cumulative plastic strain, and the schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles includes a scatter plot under set confining pressure conditions, and a curve graph obtained by fitting the scatter plot under the set confining pressure conditions.

[0022] Preferably, in the step of obtaining indoor cyclic dynamic triaxial test data of on-site roadbed fill freeze-thaw samples, the indoor cyclic dynamic triaxial test of the on-site roadbed fill freeze-thaw samples is carried out under conditions of no water replenishment or water replenishment.

[0023] In order to achieve the above second purpose, the technical solution of the seasonal frozen soil area roadbed stability evaluation device provided by the present invention is as follows:

[0024] The device for evaluating the stability of roadbed in seasonally frozen soil areas provided by the present invention comprises:

[0025] A test data acquisition unit, used to acquire indoor cyclic dynamic triaxial test data of on-site roadbed fill freeze-thaw samples;

[0026] A test parameter acquisition unit, used to obtain the required test parameters based on the indoor cyclic dynamic triaxial test data of the on-site roadbed fill freeze-thaw sample;

[0027] A schematic diagram drawing unit is used to obtain, on a coordinate system, a schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles and a schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles according to the required test parameters;

[0028] The function fitting and evaluation unit is used to obtain the functional relationship between the dynamic rebound modulus and the cumulative plastic strain according to the relationship diagram of the dynamic rebound modulus and the number of freeze-thaw cycles and the relationship diagram of the cumulative plastic strain and the number of freeze-thaw cycles, so as to evaluate the stability of the roadbed in the seasonal frozen soil area.

[0029] In order to achieve the third objective above, the technical solution of the computer-readable storage medium provided by the present invention is as follows:

[0030] The computer-readable storage medium provided by the present invention stores a seasonal frozen soil area roadbed stability evaluation program, and when the seasonal frozen soil area roadbed stability evaluation program is executed by a processor, the steps of the seasonal frozen soil area roadbed stability evaluation method provided by the present invention are implemented.

[0031] In order to achieve the fourth objective, the technical solution of the electronic device provided by the present invention is as follows:

[0032] The electronic device provided by the present invention comprises an indoor cyclic dynamic triaxial test device, a memory and a processor.

[0033] The indoor cyclic dynamic triaxial test device is used for indoor cyclic dynamic triaxial test of on-site roadbed fill freeze-thaw samples;

[0034] The memory stores a roadbed stability evaluation program in seasonal frozen soil areas;

[0035] When the seasonal frozen soil region roadbed stability evaluation program is executed by the processor, the steps of the seasonal frozen soil region roadbed stability evaluation method provided by the present invention are implemented.

[0036] After on-site sampling, the seasonal frozen soil area roadbed stability evaluation method, device, medium and electronic equipment provided by the present invention can obtain the deterioration effect of the roadbed under long-term freezing and thawing and vehicle dynamic load through indoor tests; the freeze-thaw test can adopt water replenishment conditions, and the test results are closer to the project when the groundwater level is shallow; the coupling of freeze-thaw and dynamic load is taken into account, which is closer to the on-site conditions than traditional freeze-thaw tests and dynamic load tests; the test cycle is short, the operation is simple, and the test data is consistent with the roadbed conditions in the seasonal frozen area, the coupling test is widely applicable, and the data credibility is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0038] Attached Figure 1A flowchart of the steps of the method for evaluating roadbed stability in seasonally frozen soil areas provided by an embodiment of the present invention;

[0039] Attached Figure 2 A schematic diagram of the relationship between the dynamic modulus of resilience and the number of freeze-thaw cycles involved in the method for evaluating the stability of a roadbed in a seasonally frozen soil region provided by an embodiment of the present invention;

[0040] Attached Figure 3 A schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles involved in the method for evaluating the stability of a roadbed in a seasonally frozen soil region provided by an embodiment of the present invention;

[0041] Attached Figure 4 A schematic diagram of the signal flow relationship between the functional modules in the seasonal frozen soil area roadbed stability evaluation device provided for the implementation of the present invention;

[0042] Attached Figure 5 A schematic diagram of the structure of an operating device for evaluating the stability of a roadbed in a seasonally frozen soil region in a hardware operating environment according to an embodiment of the present invention;

[0043] Description of reference numerals:

[0044] σ d - The deviatoric stress on the test specimen during the indoor cyclic triaxial test;

[0045] σ 3 - The confining pressure applied to the test sample during the indoor cyclic triaxial test;

[0046] σ d =σ 1 -σ 3 ,

[0047] in,

[0048] σ 1 -The axial stress applied to the test specimen during the indoor cyclic triaxial test. DETAILED DESCRIPTION

[0049] In view of this, the present invention provides a method, device, medium and electronic equipment for evaluating roadbed stability in seasonally frozen areas, which takes into account the coupling of freeze-thaw and dynamic loads, is closer to on-site working conditions, and is therefore more suitable for practical use.

[0050] After arduous efforts, the inventors found that in seasonal frozen soil areas, highway subgrades in service are subject to long-term dynamic loads from overlying vehicles and experience at least one freeze-thaw cycle every year. Although the bond between soil particles becomes stronger and the shear strength temporarily increases significantly after the soil freezes, the soil will experience thaw settlement and attenuation of mechanical properties after melting. Frost heave, thaw settlement deformation, etc. will lead to excessive uneven deformation of the subgrade, uneven road surface, and even road surface slurrying, bulging and cracking of slope protection panels, etc., which will seriously affect the service life of the subgrade project and increase the subsequent maintenance costs. For the evaluation of the stability of the subgrade, the dynamic modulus of resilience and the cumulative plastic strain are the two most important indicators. The dynamic modulus of resilience reflects the ability of the subgrade to resist vertical deformation in the elastic stage, and is the indicator that best reflects the strength and stability of the subgrade; the cumulative plastic strain represents the cumulative plastic deformation of the subgrade under the action of long-term vehicle dynamic loads. Both indicators can accurately reflect the performance of the subgrade under long-term vehicle loads.

[0051] The roadbed in seasonal frozen soil areas is not only affected by the freezing and thawing of the soil caused by seasonal changes every year, but also by the dynamic loads of vehicles day after day. In fact, the roadbed in normal service will be affected by both of the above factors at the same time. Under the combined effects of freezing and thawing and dynamic loads, the roadbed filler will deteriorate to a certain extent, resulting in a decrease in the dynamic modulus of resilience and an increase in the cumulative plastic strain. How to reasonably evaluate this phenomenon and achieve the coupling effect of the two is an important issue that needs to be solved in the roadbed in seasonal frozen soil areas. In this regard, a specific freeze-thaw test device can be used to conduct dynamic triaxial tests on samples that have undergone freeze-thaw cycles to achieve the coupling of the two. By selecting parameters to simulate the actual engineering state, the dynamic modulus of resilience and cumulative plastic strain obtained can be fitted with formulas, which can accurately evaluate the stability of the roadbed in seasonal frozen areas.

[0052] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of a method, device, medium and electronic device for evaluating the stability of roadbed in seasonal frozen soil areas proposed by the present invention, its specific implementation method, structure, features and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0053] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B. Specifically, it is understood that: A and B may be included at the same time, A may exist alone, or B may exist alone, and any of the above three situations may be met.

[0054] Example of roadbed stability evaluation method in seasonally frozen soil areas

[0055] See attached Figure 1 -Attached Figure 3 The method for evaluating roadbed stability in seasonally frozen soil areas provided by the embodiment of the present invention comprises the following steps:

[0056] Step S1: obtaining indoor cyclic dynamic triaxial test data of on-site roadbed fill freeze-thaw samples;

[0057] Step S2: collecting the test parameters required for the schematic diagram based on the indoor cyclic dynamic triaxial test data of the on-site roadbed fill freeze-thaw sample;

[0058] Step S3: According to the required test parameters, a schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles and a schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles are obtained on the coordinate system;

[0059] Step S4: Evaluate the stability of the roadbed in the seasonally frozen soil area according to the relationship diagram of the dynamic rebound modulus with respect to the number of freeze-thaw cycles and the relationship diagram of the cumulative plastic strain with respect to the number of freeze-thaw cycles.

[0060] After on-site sampling, the method for evaluating the stability of roadbed in seasonal frozen soil areas provided by the embodiment of the present invention can obtain the degradation effect of the roadbed under long-term freezing and thawing and vehicle dynamic loads through indoor tests; the freeze-thaw test can adopt water replenishment conditions, and the test results are closer to the project when the groundwater level is shallow; the coupling of freeze-thaw and dynamic loads is taken into account, which is closer to the on-site conditions than traditional freeze-thaw tests and dynamic load tests; the test cycle is short, the operation is simple, and the test data is consistent with the roadbed conditions in the seasonal frozen zone, the coupling test is widely applicable, and the data credibility is high.

[0061] Among them, step S4 includes the following steps between the step of evaluating the stability of the roadbed in the seasonal frozen soil area according to the schematic diagram of the relationship between the dynamic modulus of elasticity and the number of freeze-thaw cycles, the schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles, and the step of evaluating the stability of the roadbed in the seasonal frozen soil area: step S4': according to the schematic diagram of the relationship between the dynamic modulus of elasticity and the number of freeze-thaw cycles, the schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles, the functional relationship between the dynamic modulus of elasticity and the cumulative plastic strain is obtained. In this case, not only a single-dimensional quantitative relationship is used, but also an expansion of the functional relationship between the dynamic modulus of elasticity and the cumulative plastic strain is performed, so that the relationship between each data can be understood in more dimensions.

[0062] Among them, step S4' obtains the functional relationship between the dynamic elastic modulus and the cumulative plastic strain according to the relationship diagram of the dynamic elastic modulus with respect to the number of freeze-thaw cycles and the relationship diagram of the cumulative plastic strain with respect to the number of freeze-thaw cycles, and evaluates the stability of the roadbed in the seasonal frozen soil area, specifically including the following steps:

[0063] Step S411: According to the relationship diagram of the dynamic modulus of elasticity with respect to the number of freeze-thaw cycles and the relationship diagram of the cumulative plastic strain with respect to the number of freeze-thaw cycles, a relationship diagram of the dynamic modulus of elasticity with respect to the cumulative plastic strain is obtained; specifically, in this case, since the horizontal coordinates of the relationship diagram of the dynamic modulus of elasticity with respect to the number of freeze-thaw cycles and the relationship diagram of the cumulative plastic strain with respect to the number of freeze-thaw cycles are both the number of freeze-thaw cycles, taking the number of freeze-thaw cycles 2 as an example, in Figure 2 In the diagram of the relationship between the dynamic elastic modulus and the number of freeze-thaw cycles, a vertical line is drawn with the number of freeze-thaw cycles 2 as the foot of the vertical line. Figure 2 Each curve has one intersection point, namely A, B, C, and D. A perpendicular line is drawn from the intersection points A, B, C, and D to the ordinate, and the intersection points with the ordinate are a, b, c, and d, respectively. The readings of a, b, c, and d are the values ​​of the dynamic elastic modulus corresponding to each curve. In this embodiment, the reading of a is about 35 MPa, the reading of b is about 26 MPa, the reading of c is about 28 MPa, and the reading of d is about 23 MPa. Figure 3 In the diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles, a vertical line is drawn with the number of freeze-thaw cycles 2 as the foot of the vertical line. Figure 3 Each curve has one intersection, M, N, and P, respectively. The intersections M, N, and P are perpendicular to the ordinate, and the intersections with the ordinate are m, n, and p, respectively. The readings of m, n, and p are the cumulative plastic strain values ​​corresponding to each curve. In this embodiment, the reading of m is about 0.9%, the reading of n is about 0.62%, and the reading of p is about 0.36%. In this case, the number of freeze-thaw cycles can be described in sequence as 3, 4, and 5 times, respectively. The dynamic modulus of resilience and the cumulative plastic strain values ​​for more times are given. On this basis, the dynamic modulus of resilience and the cumulative plastic strain values ​​are given a schematic diagram of the relationship between the dynamic modulus of resilience and the cumulative plastic strain. The curve diagram between the dynamic modulus of resilience under the corresponding constraint conditions and the cumulative plastic strain can be obtained. At this time, since the drawing method and principle of each curve diagram are the same, the system error can be eliminated, and therefore, more dimensional data relationships can be obtained, making the data analysis results more diversified. Step S412: obtaining a fitting curve according to the schematic diagram of the relationship between the dynamic elastic modulus and the accumulated plastic strain;

[0064] Step S413: According to the fitting curve, the functional relationship between the dynamic elastic modulus and the cumulative plastic strain is obtained to evaluate the roadbed stability in the seasonally frozen soil area.

[0065] In this case, the method for evaluating the stability of roadbed in seasonal frozen soil areas provided by an embodiment of the present invention is based on the schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles, and the schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles. With the number of freeze-thaw cycles as the medium, a schematic diagram of the relationship between the dynamic rebound modulus and the cumulative plastic strain is obtained, and then curve fitting is performed. The idea is simple and the implementation is convenient.

[0066] Among them, step S4' obtains the functional relationship between the dynamic elastic modulus and the cumulative plastic strain according to the relationship diagram of the dynamic elastic modulus with respect to the number of freeze-thaw cycles and the relationship diagram of the cumulative plastic strain with respect to the number of freeze-thaw cycles, and evaluates the stability of the roadbed in the seasonal frozen soil area, specifically including the following steps:

[0067] Step S421: According to the relationship diagram of the dynamic elastic modulus with respect to the number of freeze-thaw cycles, a functional relationship X=f(y 1 ), where X represents the number of freeze-thaw cycles, y 1 Represents the dynamic modulus of elasticity. For details on the relevant constraints, see the attached Figure 2 ;

[0068] Step S422: According to the relationship diagram of the plastic strain with respect to the number of freeze-thaw cycles, a functional relationship X=f(y 2 ), where X represents the number of freeze-thaw cycles, y 2 represents the accumulated plastic strain. For details of the relevant constraints, see the attached Figure 3 ;

[0069] Step S423: According to the functional relationship between the dynamic elastic modulus and the number of freeze-thaw cycles, X=f(y 1 ), the functional relationship between plastic strain and the number of freeze-thaw cycles is X = f (y 2 ), the functional relationship between the dynamic elastic modulus and the accumulated plastic strain is obtained as f(y 1 )=f(y 2 ), the constraints include the Figure 2 , Attachment Figure 3 All constraints of the relationship are used to evaluate the stability of the roadbed in seasonal frozen areas. At this time, since the constraints of each relationship are the same when the relationship is obtained, the system error can be eliminated. Therefore, more dimensional data relationships can be obtained, making the data analysis results more diversified.

[0070] In this case, the functional relationship between the dynamic elastic modulus and the cumulative plastic strain is obtained based on the functional relationship between the dynamic elastic modulus and the number of freeze-thaw cycles and the functional relationship between the plastic strain and the number of freeze-thaw cycles, which places lower requirements on curve fitting.

[0071] Among them, in the step of obtaining the required test parameters based on the indoor cyclic dynamic triaxial test data of the on-site roadbed fill freeze-thaw specimens, the required test parameters include the number of freeze-thaw cycles, confining pressure, dynamic stress, loading frequency, initial moisture content, and initial compaction degree.

[0072] Among them, according to the required test parameters, in the coordinate system, the relationship diagram of the dynamic rebound modulus with respect to the number of freeze-thaw cycles and the relationship diagram of the cumulative plastic strain with respect to the number of freeze-thaw cycles are obtained respectively. The horizontal coordinate of the relationship diagram of the dynamic rebound modulus with respect to the number of freeze-thaw cycles is the number of freeze-thaw cycles, and the vertical coordinate of the relationship diagram of the dynamic rebound modulus with respect to the number of freeze-thaw cycles is the dynamic rebound modulus. The relationship diagram of the dynamic rebound modulus with respect to the number of freeze-thaw cycles includes a scatter plot under the set deviatoric stress condition, and a curve diagram obtained by fitting the scatter plot under the set deviatoric stress condition. In this embodiment, during the indoor cyclic dynamic triaxial test, the deviatoric stresses to which the test sample is subjected are 20kPa, 30kPa, 40kPa, and 50kPa, respectively. Therefore, 4 curve diagrams obtained by fitting the scatter plot under the set deviatoric stress condition can be drawn, see the attached Figure 2 .

[0073] Among them, according to the required test parameters, in the coordinate system, the relationship diagram of the dynamic rebound modulus relative to the number of freeze-thaw cycles and the relationship diagram of the cumulative plastic strain relative to the number of freeze-thaw cycles are obtained respectively. The horizontal coordinate of the relationship diagram of the cumulative plastic strain relative to the number of freeze-thaw cycles is the number of freeze-thaw cycles, and the vertical coordinate of the relationship diagram of the cumulative plastic strain relative to the number of freeze-thaw cycles is the cumulative plastic strain. The relationship diagram of the cumulative plastic strain relative to the number of freeze-thaw cycles includes a scatter plot under the set confining pressure conditions, and a curve diagram obtained by fitting the scatter plot under the set confining pressure conditions. In this embodiment, during the indoor cyclic dynamic triaxial test, the confining pressures applied to the test sample are 20kPa, 30kPa, and 40kPa, respectively. Therefore, 3 curve diagrams obtained by fitting the scatter plot under the set confining pressure conditions can be drawn, see the attached Figure 3 .

[0074] Among them, in the process of obtaining the indoor cyclic dynamic triaxial test data of the on-site roadbed fill freeze-thaw sample, the indoor cyclic dynamic triaxial test of the on-site roadbed fill freeze-thaw sample is carried out according to the working conditions of no water replenishment or water replenishment. In this case, since the working conditions considered are more accurate, the evaluation method of roadbed stability in seasonal frozen soil areas is more accurate.

[0075] Embodiment of the device for evaluating roadbed stability in seasonally frozen soil areas

[0076] See attached Figure 4The device for evaluating roadbed stability in seasonal frozen soil areas provided by the embodiment of the present invention comprises:

[0077] A test data acquisition unit, used to acquire indoor cyclic dynamic triaxial test data of on-site roadbed fill freeze-thaw samples;

[0078] The test parameter acquisition unit is used to obtain the required test parameters based on the indoor cyclic dynamic triaxial test data of the on-site roadbed fill freeze-thaw sample;

[0079] A schematic diagram drawing unit is used to obtain, on a coordinate system, a schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles and a schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles according to the required test parameters;

[0080] The function fitting and evaluation unit is used to obtain the functional relationship between the dynamic rebound modulus and the cumulative plastic strain according to the relationship diagram of the dynamic rebound modulus and the number of freeze-thaw cycles, and the relationship diagram of the cumulative plastic strain and the number of freeze-thaw cycles, so as to evaluate the stability of the roadbed in the seasonal frozen soil area.

[0081] After on-site sampling, the seasonal frozen soil area roadbed stability evaluation device provided by the embodiment of the present invention can obtain the degradation effect of the roadbed under long-term freezing and thawing and vehicle dynamic load through indoor tests; the freeze-thaw test can adopt water replenishment conditions, and the test results are closer to the project when the groundwater level is shallow; the coupling of freeze-thaw and dynamic load is taken into account, which is closer to the on-site conditions than traditional freeze-thaw tests and dynamic load tests; the test cycle is short, the operation is simple, and the test data is consistent with the roadbed conditions in the seasonal frozen area, the coupling test is widely applicable, and the data credibility is high.

[0082] Computer Readable Storage Medium Embodiments

[0083] The computer-readable storage medium provided in the embodiment of the present invention stores a seasonal frozen soil area roadbed stability evaluation program. When the seasonal frozen soil area roadbed stability evaluation program is executed by the processor, the steps of the seasonal frozen soil area roadbed stability evaluation method provided in the present invention are implemented.

[0084] After on-site sampling of the computer-readable storage medium provided by the embodiment of the present invention, the degradation effect of the roadbed under long-term freeze-thaw and vehicle dynamic load can be obtained through indoor tests; the freeze-thaw test can adopt water replenishment conditions, and the test results are closer to the project when the groundwater level is shallow; the coupling of freeze-thaw and dynamic load is taken into account, which is closer to the on-site conditions than traditional freeze-thaw tests and dynamic load tests; the test cycle is short, the operation is simple, and the test data is consistent with the roadbed conditions in the seasonal freezing zone, the coupling test is widely applicable, and the data credibility is high.

[0085] Electronic device embodiment

[0086] The electronic device provided by the present invention comprises an indoor cyclic dynamic triaxial test device, a memory and a processor.

[0087] The indoor cyclic dynamic triaxial test device is used for indoor cyclic dynamic triaxial test of on-site roadbed fill freeze-thaw samples;

[0088] The memory stores a program for evaluating the stability of the roadbed in seasonally frozen soil areas;

[0089] When the seasonal frozen soil region roadbed stability evaluation program is executed by the processor, the steps of the seasonal frozen soil region roadbed stability evaluation method provided by the present invention are implemented.

[0090] After on-site sampling of the electronic device provided by the embodiment of the present invention, the degradation effect of the roadbed under long-term freezing and thawing and vehicle dynamic load can be obtained through indoor tests; the freeze-thaw test can adopt water replenishment conditions, and the test results are closer to the project when the groundwater level is shallow; the coupling of freeze-thaw and dynamic load is taken into account, which is closer to the on-site conditions than traditional freeze-thaw tests and dynamic load tests; the test cycle is short, the operation is simple, and the test data is consistent with the roadbed conditions in the seasonal freezing zone, the coupling test is widely applicable, and the data credibility is high.

[0091] Among them, refer to Figure 5 , Figure 5 This is a schematic diagram of the structure of operating equipment for evaluating roadbed stability in seasonally frozen soil areas in the hardware operating environment involved in an embodiment of the present invention.

[0092] like Figure 5 As shown, the operating equipment for evaluating the stability of the roadbed in the seasonal frozen soil area may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen Display, an input unit such as a keyboard Keyboard, and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface such as a wireless fidelity WIreless-FIdelity, WI-FI interface. The memory 1005 may be a high-speed random access memory RandomAccess Memory, RAM memory, or a stable non-volatile memory Non-Volatile Memory, NVM, such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0093] Those skilled in the art will understand that Figure 5The structure shown in the figure does not constitute a limitation on the operating equipment for evaluating the stability of roadbed in seasonally frozen soil areas, and may include more or less components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0094] like Figure 5 As shown, the memory 1005 as a storage medium may include an operating system, a data storage module, a network communication module, a user interface module, and an operating program for evaluating the stability of roadbed in seasonally frozen soil areas.

[0095] exist Figure 5 In the operating device for evaluating the stability of roadbed in seasonal frozen soil areas shown in the figure, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the operating device for evaluating the stability of roadbed in seasonal frozen soil areas of the present invention can be arranged in the operating device for evaluating the stability of roadbed in seasonal frozen soil areas, and the operating device for evaluating the stability of roadbed in seasonal frozen soil areas calls the operating program for evaluating the stability of roadbed in seasonal frozen soil areas stored in the memory 1005 through the processor 1001, and executes the operating method for evaluating the stability of roadbed in seasonal frozen soil areas provided in the embodiment of the present invention.

[0096] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0097] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for evaluating roadbed stability in seasonally frozen areas, characterized in that: The following steps are involved: Obtain indoor cyclic dynamic triaxial test data of on-site roadbed fill freeze-thaw samples; According to the indoor cyclic dynamic triaxial test data of the on-site roadbed fill freeze-thaw sample, the test parameters required for the schematic diagram are collected; According to the required test parameters, a schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles and a schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles are obtained on the coordinate system; Based on the relationship diagram of dynamic elastic modulus and the number of freeze-thaw cycles, and the relationship diagram of cumulative plastic strain and the number of freeze-thaw cycles, the stability of the roadbed in seasonal frozen soil areas is evaluated. Between the step of providing a schematic diagram of the relationship between the dynamic modulus of elasticity and the number of freeze-thaw cycles, the schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles, and the step of evaluating the stability of the roadbed in the seasonally frozen soil area, the following steps are also included: According to the relationship diagram of the dynamic rebound modulus with respect to the number of freeze-thaw cycles and the relationship diagram of the cumulative plastic strain with respect to the number of freeze-thaw cycles, a functional relationship between the dynamic rebound modulus and the cumulative plastic strain is obtained; in, According to the relationship diagram of the dynamic rebound modulus with respect to the number of freeze-thaw cycles and the relationship diagram of the cumulative plastic strain with respect to the number of freeze-thaw cycles, obtaining the functional relationship between the dynamic rebound modulus and the cumulative plastic strain, the evaluation of the roadbed stability in the seasonally frozen soil area specifically includes the following steps: According to the schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles and the schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles, a schematic diagram of the relationship between the dynamic rebound modulus and the cumulative plastic strain is obtained; According to the schematic diagram of the relationship between the dynamic elastic modulus and the accumulated plastic strain, the fitting curve is obtained; According to the fitting curve, a functional relationship between the dynamic elastic modulus and the cumulative plastic strain is obtained to evaluate the stability of the roadbed in the seasonally frozen soil area; or, According to the relationship diagram of the dynamic rebound modulus with respect to the number of freeze-thaw cycles and the relationship diagram of the cumulative plastic strain with respect to the number of freeze-thaw cycles, obtaining the functional relationship between the dynamic rebound modulus and the cumulative plastic strain, the evaluation of the roadbed stability in the seasonally frozen soil area specifically includes the following steps: According to the relationship diagram of dynamic elastic modulus with respect to the number of freeze-thaw cycles, the functional relationship between dynamic elastic modulus and the number of freeze-thaw cycles was fitted; According to the diagram of the relationship between the plastic strain and the number of freeze-thaw cycles, the functional relationship between the plastic strain and the number of freeze-thaw cycles is fitted; According to the functional relationship between the dynamic rebound modulus and the number of freeze-thaw cycles, and the functional relationship between the plastic strain and the number of freeze-thaw cycles, the functional relationship between the dynamic rebound modulus and the accumulated plastic strain is obtained to evaluate the stability of the roadbed in seasonally frozen areas.

2. The method for evaluating roadbed stability in seasonally frozen soil areas according to claim 1, characterized in that: In the step of obtaining the required test parameters based on the indoor cyclic dynamic triaxial test data of the on-site roadbed fill freeze-thaw sample, the required test parameters include the number of freeze-thaw cycles, confining pressure, dynamic stress, loading frequency, initial moisture content, and initial compaction degree.

3. The method for evaluating roadbed stability in seasonally frozen soil areas according to claim 1, characterized in that: According to the required test parameters, in the steps of obtaining a schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles and a schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles on a coordinate system, the abscissa of the schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles is the number of freeze-thaw cycles, the ordinate of the schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles is the dynamic rebound modulus, and the schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles includes a scatter plot under a set deviatoric stress condition, and a curve graph obtained by fitting the scatter plot under the set deviatoric stress condition.

4. The method for evaluating roadbed stability in seasonally frozen soil areas according to claim 1, characterized in that: According to the required test parameters, in the steps of obtaining a schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles and a schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles on a coordinate system, the abscissa of the schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles is the number of freeze-thaw cycles, the ordinate of the schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles is the cumulative plastic strain, and the schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles includes a scatter plot under set confining pressure conditions, and a curve graph obtained by fitting the scatter plot under the set confining pressure conditions.

5. The method for evaluating roadbed stability in seasonally frozen soil areas according to claim 1, characterized in that: During the step of obtaining indoor cyclic dynamic triaxial test data of the on-site roadbed fill freeze-thaw sample, the indoor cyclic dynamic triaxial test of the on-site roadbed fill freeze-thaw sample is performed under no water replenishment or water replenishment conditions.

6. A device for evaluating roadbed stability in seasonally frozen areas, characterized in that: include: A test data acquisition unit, used to acquire indoor cyclic dynamic triaxial test data of on-site roadbed fill freeze-thaw samples; A test parameter acquisition unit, used to obtain the required test parameters based on the indoor cyclic dynamic triaxial test data of the on-site roadbed fill freeze-thaw sample; A schematic diagram drawing unit is used to obtain, on a coordinate system, a schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles and a schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles according to the required test parameters; A function fitting and evaluation unit, for evaluating the stability of the roadbed in the seasonally frozen soil area by obtaining a functional relationship between the dynamic elastic modulus and the cumulative plastic strain according to a schematic diagram of the relationship between the dynamic elastic modulus and the number of freeze-thaw cycles and a schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles; Between the step of providing a schematic diagram of the relationship between the dynamic modulus of elasticity and the number of freeze-thaw cycles, the schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles, and the step of evaluating the stability of the roadbed in the seasonally frozen soil area, the following steps are also included: According to the relationship diagram of the dynamic rebound modulus with respect to the number of freeze-thaw cycles and the relationship diagram of the cumulative plastic strain with respect to the number of freeze-thaw cycles, a functional relationship between the dynamic rebound modulus and the cumulative plastic strain is obtained; in, According to the relationship diagram of the dynamic rebound modulus with respect to the number of freeze-thaw cycles and the relationship diagram of the cumulative plastic strain with respect to the number of freeze-thaw cycles, obtaining the functional relationship between the dynamic rebound modulus and the cumulative plastic strain, the evaluation of the roadbed stability in the seasonally frozen soil area specifically includes the following steps: According to the schematic diagram of the relationship between the dynamic rebound modulus and the number of freeze-thaw cycles and the schematic diagram of the relationship between the cumulative plastic strain and the number of freeze-thaw cycles, a schematic diagram of the relationship between the dynamic rebound modulus and the cumulative plastic strain is obtained; According to the schematic diagram of the relationship between the dynamic elastic modulus and the accumulated plastic strain, the fitting curve is obtained; According to the fitting curve, a functional relationship between the dynamic elastic modulus and the cumulative plastic strain is obtained to evaluate the stability of the roadbed in the seasonally frozen soil area; or, According to the relationship diagram of the dynamic rebound modulus with respect to the number of freeze-thaw cycles and the relationship diagram of the cumulative plastic strain with respect to the number of freeze-thaw cycles, obtaining the functional relationship between the dynamic rebound modulus and the cumulative plastic strain, the evaluation of the roadbed stability in the seasonally frozen soil area specifically includes the following steps: According to the relationship diagram of dynamic elastic modulus with respect to the number of freeze-thaw cycles, the functional relationship between dynamic elastic modulus and the number of freeze-thaw cycles was fitted; According to the diagram of the relationship between the plastic strain and the number of freeze-thaw cycles, the functional relationship between the plastic strain and the number of freeze-thaw cycles is fitted; According to the functional relationship between the dynamic rebound modulus and the number of freeze-thaw cycles, and the functional relationship between the plastic strain and the number of freeze-thaw cycles, the functional relationship between the dynamic rebound modulus and the accumulated plastic strain is obtained to evaluate the stability of the roadbed in seasonally frozen areas.

7. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a seasonal frozen soil area roadbed stability evaluation program, and when the seasonal frozen soil area roadbed stability evaluation program is executed by the processor, the steps of the seasonal frozen soil area roadbed stability evaluation method described in any one of claims 1-5 are implemented.

8. An electronic device, characterized in that: It includes an indoor cyclic triaxial test device, a memory and a processor. The indoor cyclic dynamic triaxial test device is used for indoor cyclic dynamic triaxial test of on-site roadbed fill freeze-thaw samples; The memory stores a roadbed stability evaluation program in seasonal frozen soil areas; When the seasonal frozen soil area roadbed stability evaluation program is executed by the processor, the steps of the seasonal frozen soil area roadbed stability evaluation method described in any one of claims 1 to 5 are implemented.

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