A soft soil foundation consolidation settlement calculation method and system suitable for random multi-stage loading

Abstract

This application discloses a method and system for calculating consolidation settlement of soft soil foundations under random multi-stage loading. The method includes: dividing the random multi-stage loading process into multiple load stages based on the actual load-time curve; calculating the total settlement of each load stage under individual action based on physical and mechanical parameters; calculating the degree of consolidation of each load stage at any time, based on one-dimensional consolidation theory, physical and mechanical parameters, and drainage conditions, starting from the application time of each load stage; calculating the consolidation settlement component of each applied load stage at any time, starting from the application time of the first load stage, based on the total settlement and degree of consolidation; and accumulating the consolidation settlement component of each applied load stage at any time step by step to obtain the total consolidation settlement of the entire random multi-stage loading process. This application can adapt to irregular, random multi-stage loading conditions, and the calculation method is simple and reliable, and can be widely used in the field of geotechnical engineering technology.

Description

Technical Field

[0001] This application relates to the field of geotechnical engineering technology, and in particular to a method and system for calculating consolidation settlement of soft soil foundations applicable to random multi-stage loading. Background Technology

[0002] Soft soil foundations are characterized by high water content, low permeability, high compressibility, and long consolidation settlement duration, resulting in significant settlement deformation and uneven settlement in engineering construction. Traditional methods for calculating consolidation settlement of soft soil foundations are mostly based on ideal conditions such as graded uniform loading and regular loading, which are difficult to adapt to the complex conditions of real-world engineering projects where loads vary randomly and are subject to multiple stages of irregular loading, including different graded loading rates, different loading times, and different intervals between loading stages. Summary of the Invention

[0003] The main objective of this application is to propose a method and system for calculating consolidation settlement of soft soil foundations under random multi-level loading, which can improve the accuracy and applicability of settlement prediction under complex loading conditions.

[0004] To achieve the above objectives, one aspect of this application proposes a method for calculating consolidation settlement of soft soil foundations under random multi-stage loading, comprising the following steps: Obtain the physical and mechanical parameters of the soft soil foundation, drainage conditions, and the actual load-time curves within the target period; Based on the actual loading-time curve, the random multi-level loading process is divided into multi-level loads, wherein each level of the load corresponds to a unique application time, load magnitude, and holding time. Based on the physical and mechanical parameters, calculate the total settlement of each load level under individual action; Based on the one-dimensional consolidation theory, according to the physical and mechanical parameters and the drainage conditions, the degree of consolidation of each load level at any time is calculated, starting from the application time of each load level. Based on the total settlement of the grades and the degree of consolidation, starting from the application time of the first grade load, calculate the consolidation settlement component of each grade of applied load at any time. The consolidation settlement components of each applied load at any time are accumulated step by step to obtain the total consolidation settlement of the entire random multi-level loading process.

[0005] In some embodiments, dividing the random multi-stage loading process into multi-stage loads based on the actual load-time curve specifically includes: Determine the total load, the number of load grades, and the coordinates of the corner points and calculation points of the actual load-time curve; Based on the total load and the number of load levels, the actual loading-time curve is divided to obtain multiple load levels. Based on the corner coordinates and the calculation point coordinates, calculate the width, maximum width, height of each load level, and the coordinates of the calculation point relative to each load level.

[0006] In some embodiments, calculating the total settlement of each load level under individual action based on the physical and mechanical parameters specifically includes: Based on the physical and mechanical parameters, calculate the depth, ultimate bearing capacity, and additional stress of each stratum under individual loads. Calculate the tangent modulus of each stratum based on the physical and mechanical parameters and the ultimate bearing capacity; Based on the depth, the tangent modulus, and the additional stress, calculate the settlement of each load level in each stratum. The settlement amounts of each load level in each stratum are summed to obtain the total settlement amount of each load level under individual action.

[0007] In some embodiments, the drainage conditions include conditions with drainage measures and conditions without drainage measures. The calculation of the degree of consolidation of each load level at any given time, based on one-dimensional consolidation theory and according to the physical and mechanical parameters and the drainage conditions, taking the application time of each load level as a starting point, specifically includes: With drainage measures in place, starting from the application time of each load level, the first degree of consolidation of each load level at any time is calculated based on the Terzaghi consolidation formula in one-dimensional consolidation theory and the radial consolidation considering the resistance of the smeared well, according to the physical and mechanical parameters. Without drainage measures, starting from the application time of each load level, the second degree of consolidation of each load level at any time is calculated based on the Terzaghi consolidation formula in one-dimensional consolidation theory and the physical and mechanical parameters. The degree of consolidation of different load levels at the same application time is different.

[0008] In some embodiments, the step of calculating the consolidation settlement component of each applied load at any time, based on the total graded settlement and the degree of consolidation, starting from the application time of the first grade load, specifically includes: With drainage measures in place, starting from the time when the load of that level is applied, the total settlement of each level of load is multiplied by the corresponding first degree of consolidation to obtain the first consolidation settlement of each level of load at any time. Then, based on the first consolidation settlement, the first consolidation settlement component of each level of applied load at any time is obtained. Without drainage measures, starting from the time when the load of each level is applied, the total settlement of each level of load is multiplied by the corresponding second degree of consolidation to obtain the second consolidation settlement of each level of load at any time. Then, based on the first consolidation settlement, the second consolidation settlement component of each level of applied load at any time is obtained.

[0009] In some embodiments, the step of accumulating the consolidation settlement components of each applied load at any given time to obtain the total consolidation settlement over the entire random multi-stage loading process specifically includes: With drainage measures in place, the first consolidation settlement component of each applied load at any time is accumulated step by step to obtain the first total consolidation settlement of the entire random multi-level loading process. Without drainage measures, the second consolidation settlement component of each applied load at any time is accumulated step by step to obtain the second total consolidation settlement of the entire random multi-level loading process.

[0010] In some embodiments, the method further includes: Based on the total consolidation settlement during the entire random multi-stage loading process, a full-cycle settlement-time curve is constructed.

[0011] To achieve the above objectives, another aspect of this application proposes a system for calculating consolidation settlement of soft soil foundations under random multi-stage loading, comprising: The parameter acquisition module is used to acquire the physical and mechanical parameters of the soft soil foundation, drainage conditions, and the actual load-time curve within the target period. The load division module is used to divide the random multi-level loading process into multiple load levels according to the actual loading-time curve, wherein each load level corresponds to a unique application time, load magnitude and holding time. The first calculation module is used to calculate the total settlement of each load level under individual action based on the physical and mechanical parameters. The second calculation module is used to calculate the degree of consolidation of each load level at any time, based on the one-dimensional consolidation theory, according to the physical and mechanical parameters and the drainage conditions, taking the application time of each load level as the starting point. The third calculation module is used to calculate the consolidation settlement component of each applied load at any time, based on the total graded settlement and the degree of consolidation, taking the application time of the first grade load as the starting point. The fourth calculation module is used to accumulate the consolidation settlement component of each applied load at any time to obtain the total consolidation settlement of the entire random multi-level loading process.

[0012] To achieve the above objectives, another aspect of this application provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the method described above.

[0013] To achieve the above objectives, another aspect of the embodiments of this application proposes a storage medium, which is a computer-readable storage medium for computer-readable storage, characterized in that the storage medium stores one or more programs, which can be executed by one or more processors to implement the method described above.

[0014] The embodiments of this application include at least the following beneficial effects: The method and system for calculating consolidation settlement of soft soil foundations applicable to random multi-level loading of this application first obtains the physical and mechanical parameters, drainage conditions, and actual loading-time curves within the target time period of the soft soil foundation; then, based on the actual loading-time curves, the random multi-level loading process is divided into multiple load levels, where each load level corresponds to a unique application time, load magnitude, and holding time; then, based on the physical and mechanical parameters, the total settlement of each load level under individual action is calculated; then, based on one-dimensional consolidation theory, according to the physical and mechanical parameters and drainage conditions, the degree of consolidation of each load level at any time is calculated, starting from the application time of each load level; furthermore, based on the total settlement of each level and the degree of consolidation, the consolidation settlement component of each applied load level at any time is calculated, starting from the application time of the first load level; finally, the consolidation settlement component of each applied load level at any time is accumulated moment by moment to obtain the total consolidation settlement of the entire random multi-level loading process. This application is based on one-dimensional consolidation theory, without considering rheology and secondary consolidation. It divides random multi-level loading into multiple independent load levels, and calculates the total settlement and degree of consolidation for each load level. The total consolidation settlement at any time is obtained by multiplying the total settlement of each load level by the corresponding degree of consolidation and then superimposing them. It can adapt to irregular and random multi-level loading conditions, and the calculation method is simple and accurate. It is suitable for settlement calculation and prediction of soft soil foundation filling projects. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments of this application are described below. It should be understood that the drawings described below are only for the purpose of clearly illustrating some embodiments of the technical solutions in this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 A flowchart illustrating the steps of a method for calculating consolidation settlement of soft soil foundations under random multi-stage loading, provided in one embodiment of this application; Figure 2 A schematic diagram of the load profile, graded strip profile, and settlement curve provided in one embodiment of this application; Figure 3 This application provides a full-cycle settlement-time curve for one embodiment of the present application. Figure 4 This application provides a schematic diagram of the structure of a soft soil foundation consolidation settlement calculation system suitable for random multi-level loading, as one embodiment of the present application. Figure 5 This is a schematic diagram of the hardware structure of an electronic device provided in one embodiment of this application. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit it. In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with those of this application; they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this application as detailed in the appended claims.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0019] Soft soil foundations are characterized by high water content, low permeability, high compressibility, and long consolidation settlement duration, resulting in significant settlement deformation and uneven settlement in engineering construction. Traditional methods for calculating consolidation settlement of soft soil foundations are mostly based on ideal conditions such as graded uniform loading and regular loading, which are difficult to adapt to the complex conditions of real-world engineering projects where loads vary randomly and are subject to multiple stages of irregular loading, including different graded loading rates, different loading times, and different intervals between loading stages.

[0020] Existing technologies for handling random multi-stage loading typically employ simplified equivalents or piecewise averaging, which have the following shortcomings: 1. They cannot accurately reflect the random, discontinuous, and multi-period-changing loading paths; 2. They do not adequately consider the coupled effects of stress history, loading rate, and loading timing during the consolidation process; 3. The calculated results deviate significantly from the actual settlement observations, making it difficult to meet engineering accuracy requirements.

[0021] In view of this, this application proposes a method for calculating the consolidation settlement of soft soil foundations under random multi-stage loading. First, the physical and mechanical parameters of the soft soil foundation, drainage conditions, and the actual load-time curve within the target period are obtained. Then, based on the actual load-time curve, the random multi-stage loading process is divided into multiple load stages, where each load stage corresponds to a unique application time, load magnitude, and holding time. Next, based on the physical and mechanical parameters, the total settlement of each load stage under individual action is calculated. Then, based on one-dimensional consolidation theory, according to the physical and mechanical parameters and drainage conditions, the degree of consolidation of each load stage at any given time is calculated, starting from the application time of each load stage. Furthermore, based on the total settlement and degree of consolidation, the consolidation settlement component of each applied load stage at any given time is calculated, starting from the application time of the first load stage. Finally, the consolidation settlement component of each applied load stage at any given time is accumulated moment by moment to obtain the total consolidation settlement of the entire random multi-stage loading process. This application is based on one-dimensional consolidation theory, without considering rheology and secondary consolidation. It divides random multi-level loading into multiple independent load levels, and calculates the total settlement and degree of consolidation for each load level. The total consolidation settlement at any time is obtained by multiplying the total settlement of each load level by the corresponding degree of consolidation and then superimposing them. It can adapt to irregular and random multi-level loading conditions, and the calculation method is simple and accurate. It is suitable for settlement calculation and prediction of soft soil foundation filling projects.

[0022] Reference Figure 1 , Figure 1 This is a flowchart illustrating the steps of a method for calculating consolidation settlement of soft soil foundations under random multi-stage loading, as provided in one embodiment of this application. This embodiment proposes a method for calculating consolidation settlement of soft soil foundations under random multi-stage loading, which may include, but is not limited to, the following steps S101 to S106: Step S101: Obtain the physical and mechanical parameters of the soft soil foundation, drainage conditions, and the actual load-time curve within the target period; In some optional embodiments, the physical and mechanical parameters of the soft soil foundation include soil layer thickness, compression modulus, compression coefficient, consolidation coefficient, vertical drainage conditions, radial drainage conditions, etc.; drainage conditions include conditions with drainage measures and conditions without drainage measures; and the actual loading-time curve is determined based on the actual filling and loading process of the project.

[0023] Step S102: Based on the actual loading-time curve, the random multi-level loading process is divided into multi-level loads, where each level of load corresponds to a unique application time, load magnitude, and holding time. Specifically, the actual load-time curve is discretized into a multi-level stepped load sequence, thereby dividing the random multi-level loading process into multi-level strip loads. Each subdivided load level corresponds to an independent application time, load magnitude, and holding time to adapt to random and irregular loading paths.

[0024] As an optional implementation, step S102 can be further divided into the following steps S1021 to S1023: Step S1021: Determine the total load, the number of load grades, and the coordinates of the corner points and calculation points of the actual load-time curve; Step S1022: Based on the total load and the number of load levels, divide the actual loading-time curve to obtain multi-level loads; Step S1023: Based on the corner coordinates and calculation point coordinates, calculate the width, maximum width, height of each load level, and the coordinates of the calculation point relative to each load level.

[0025] Specifically, determine the total load. (Unit: kPa), Load Classification Number And the coordinates of the four corner points of the actual load-time curve (in counterclockwise order, including...) , ) and calculate point coordinates .

[0026] common For each level of strip load, calculate the width of the strip load. and height And the coordinates of the calculation point relative to each load level. ,in, .

[0027] Based on corner coordinates and load classification Calculate the left coordinate of the strip load. And the right coordinate of the strip load : ; ; Based on the left coordinate of the strip load And the right coordinate of the strip load Calculate the width of each level of strip load. : ; Subtracting the horizontal coordinates of the bottom surface of the load application plane yields the maximum width of the strip load. : ; Based on total load and load classification number Calculate the height of each level of strip load. (The height of each strip load is equal): ; Calculate the coordinates of the point left coordinate of the strip load Subtracting the values ​​yields the coordinates of the calculation point relative to each load level. : .

[0028] Step S103: Calculate the total settlement of each load level under individual action based on the physical and mechanical parameters. Specifically, for the first For each level of random load, based on the load increment and the foundation compression characteristics, the nonlinear tangent modulus method is used to calculate the total settlement under the individual action of this level of load. .

[0029] As an optional implementation, step S103 can be further divided into the following steps S1031 to S1034: Step S1031: Based on the physical and mechanical parameters, calculate the depth, ultimate bearing capacity, and additional stress of each stratum under individual load. Step S1032: Calculate the tangent modulus of each stratum based on physical and mechanical parameters and ultimate bearing capacity; Step S1033: Calculate the settlement of each load level in each stratum based on the depth, tangent modulus, and additional stress. Step S1034: The settlement of each load level in each stratum is accumulated to obtain the total settlement of each load level under individual action.

[0030] Specifically, obtain the load classification number from the physical and mechanical parameters. internal friction angle (Unit: degrees), cohesion (Unit: kPa), number of stratigraphic layers Total thickness of strata (Unit: m) Depth of strata (unit: m), natural bulk density (Unit: kN / m) 3 ), initial modulus (Unit: MPa) and stress ratio correction factor .

[0031] Calculate the ultimate bearing capacity of each stratum under each load level. ， Add initial modulus Calculate the tangent modulus Calculate the total settlement for each load level. and total settlement .

[0032] First, based on the internal friction angle Determine the bearing capacity coefficient of the first foundation. Second foundation bearing capacity coefficient and the bearing capacity coefficient of the third foundation : ; ; ; Based on the number of stratigraphic layers and total thickness of strata Calculate the depth of each stratigraphic unit. : ; in, Indicates the first The depth of the stratigraphic calculation unit, Indicates the first The depth of the stratigraphic calculation unit.

[0033] Furthermore, according to the first Depth of each stratigraphic unit , No. Depth of each stratigraphic unit and the depth of burial strata Calculate the intermediate burial depth of each stratigraphic unit. : ; Based on natural density Calculate the unit weight of soil in each stratum. : ; And based on the intermediate burial depth and soil density Calculate the self-weight of each soil layer: ; According to the bearing capacity coefficient of the foundation ( , as well as ), soil unit weight Soil self-weight Cohesion and the maximum width of the load obtained from the aforementioned steps. The ultimate bearing capacity of each stratum was calculated. : ; Then, based on the width of each level of strip load obtained from the aforementioned steps... and intermediate burial depth Calculation coefficient for additional stress on a strip base subjected to uniformly distributed load. and : , ; Based on the coefficient of additional stress and Calculate the additional stress coefficient of a strip base subjected to a uniformly distributed load. : ; Then based on the additional stress coefficient The strip load height obtained from the aforementioned steps Calculate the additional stress when a strip load is applied to the unit. : ; The sum of the self-weight stress and the additional stress on the foundation The following formula is used to calculate: ; Among them, if (i.e., the first level of load), then the sum of the self-weight stress and the additional stress on the foundation. ;like (i.e., the second level of load to the first level) If the load is a level 1 load, then the sum of the self-weight stress and the additional stress on the foundation is... .

[0034] Based on stress ratio correction factor The sum of self-weight stress and additional stress Initial modulus Ultimate bearing capacity of various strata Calculate the tangent modulus of each stratum. : ; Subsidence of the unit stratum The following formula is used to calculate: ; The settlement of each stratum is summed to obtain the total settlement of each load level under individual action. : ; Furthermore, calculate the total settlement under the total load. : .

[0035] Step S104: Based on the one-dimensional consolidation theory, according to the physical and mechanical parameters and drainage conditions, take the application time of each load level as the starting point and calculate the degree of consolidation of each load level at any time. Specifically, with the first Starting from the moment the first load is applied, and based on one-dimensional consolidation theory, considering both with and without drainage measures, the calculation is performed at any given time. The degree of consolidation corresponding to this load level or Since the different load levels are applied at different times, the degree of consolidation of different load levels at the same time is different.

[0036] As an optional implementation, the drainage conditions include conditions with drainage measures and conditions without drainage measures. Step S104 can be further divided into the following steps S1041 to S1042: Step S1041: Under the condition of drainage measures, taking the application time of each load level as the starting point, based on Terzaghi's consolidation degree formula in one-dimensional consolidation theory and the radial consolidation degree considering the resistance of the smear well, calculate the first degree of consolidation of each load level at any time according to physical and mechanical parameters. Specifically, the soil compression modulus is first obtained from the physical and mechanical parameters. (Unit: MPa) Specific gravity of water (Unit: kN / m) 3 Single-sided drainage depth (Unit: m) Vertical permeability coefficient of soil layer (Unit: cm / s) Horizontal permeability coefficient of soil layer (Unit: cm / s). Depth of plastic drainage belt. (Unit: m) Thickness of plastic drainage strip (Unit: m) Width of plastic drainage belt (Unit: m) Drainage belt spacing (Unit: m), effective drainage coefficient for triangular or square layout Horizontal penetration coefficient of the coating area (Unit: cm / s) Permeability coefficient of plastic drainage board (Unit: cm / s) Ratio of the diameter of the smeared area to the equivalent diameter Consolidation time (Unit: day). Loading levels Loading time per level Settlement at each level (i.e., the total settlement calculated in the aforementioned steps); loading calculation time. (Unit: day), Calculation time ( The unit is days.

[0037] Next, calculate the degree of consolidation under conditions with and without drainage (the units of the variables need to be converted to a unified standard unit during the calculation), in the following formula. .

[0038] According to the width of the plastic drainage belt And the thickness of plastic drainage strip Calculate the equivalent diameter of the plastic drainage board. : ; The effective drainage coefficient is arranged according to a triangle or square. Spacing between drainage belts Calculate the effective drainage diameter of the plastic drainage board. : ; According to the width of the plastic drainage belt , thickness of plastic drainage strip and the permeability coefficient of plastic drainage boards Calculate the vertical water flow rate of the plastic drainage board. : ; According to the effective drainage diameter of the plastic drainage board and strip load height Calculate the radial coefficient : ; Then, based on the horizontal permeability coefficient of the soil layer Horizontal penetration coefficient of the coating area and the ratio of the diameter of the smeared area to the equivalent diameter. Calculate the radial coating effect coefficient : ; According to the depth of the plastic drainage belt Horizontal permeability coefficient of soil layer Vertical water flow of plastic drainage board Calculate the radial well resistance coefficient : ; Then consider the radial coefficient of the coating and well resistance effects. for: ; Based on soil compression modulus Vertical permeability coefficient of soil layer Horizontal permeability coefficient of soil layer and the specific gravity of water Calculate the vertical consolidation coefficient and radial consolidation coefficient : , ; The loading time is converted to obtain the converted loading time. : ; Furthermore, based on the vertical consolidation coefficient Radial consolidation coefficient Loading conversion time Single-sided drainage depth and the effective drainage diameter of the plastic drainage board Calculate the vertical consolidation time factor and radial consolidation time factor : , ; Vertical consolidation The following formula is used to calculate: ; Radial consolidation degree considering well resistance The following formula is used to calculate: ; Finally, the first degree of consolidation under drainage conditions is calculated using the following formula for each day. : .

[0039] Step S1042: Under the condition of no drainage measures, taking the application time of each load level as the starting point, and based on Terzaghi's degree of consolidation formula in one-dimensional consolidation theory, calculate the second degree of consolidation of each load level at any time according to physical and mechanical parameters. The degree of consolidation of different load levels at the same application time is different.

[0040] Specifically, the second degree of consolidation under the condition of no drainage measures is calculated using the following formula. : .

[0041] Step S105: Based on the total settlement and degree of consolidation of each stage, starting from the time of application of the first stage load, calculate the consolidation settlement component of each stage of applied load at any time. As an optional implementation, step S105 can be further divided into the following steps S1051 to S1052: Step S1051: Under the condition of drainage measures, starting from the time of application of the load level, multiply the total settlement of each load level by the corresponding first degree of consolidation to obtain the first consolidation settlement of each load level at any time, and then obtain the first consolidation settlement component of each applied load level at any time based on the first consolidation settlement. Step S1052: Under the condition of no drainage measures, starting from the time of application of the load level, multiply the total settlement of each load level by the corresponding second degree of consolidation to obtain the second consolidation settlement of each load level at any time. Then, based on the first consolidation settlement, obtain the second consolidation settlement component of each applied load level at any time.

[0042] Specifically, under conditions with drainage measures, the first The first consolidation settlement of the load level, starting from the moment the load level is applied. for: ; Then, taking the loading time of the first level of load as the starting point, the first consolidation settlement component of a certain level of load on a certain day is obtained. for: ; Under conditions without drainage measures, the first The second consolidation settlement of the load level, starting from the time the load level is applied. for: ; Therefore, taking the loading time of the first level of load as the starting point, the second consolidation settlement component of a certain level of load on a certain day is obtained as follows: : ; in, , , .

[0043] Step S106: Accumulate the consolidation settlement component of each applied load at any time to obtain the total consolidation settlement of the entire random multi-level loading process.

[0044] Specifically, at any time The total settlement is the sum of the consolidation settlement components of all applied loads, i.e. or .

[0045] As an optional implementation, step S106 can be further divided into the following steps S1061 to S1062: Step S1061: Under the condition of drainage measures, the first consolidation settlement component of each applied load at any time is accumulated step by step to obtain the first total consolidation settlement of the entire random multi-level loading process. Step S1062: Under the condition of no drainage measures, the second consolidation settlement component of each applied load at any time is accumulated step by step to obtain the second total consolidation settlement of the entire random multi-level loading process.

[0046] With drainage measures in place, the first total consolidation settlement on a certain day, starting from the moment the first level of load is applied. for: ; Without drainage measures, the second total consolidation settlement on a certain day, starting from the moment the first load was applied. for: .

[0047] As a further optional implementation, the method for calculating consolidation settlement of soft soil foundations under random multi-stage loading may also include the following step S107: Step S107: Construct a full-cycle settlement-time curve based on the total consolidation settlement during the entire random multi-stage loading process.

[0048] Specifically, for the entire filling and consolidation process of random multi-stage loading, the load is calculated and accumulated moment by moment and stage by stage in the above manner to obtain the full-cycle settlement-time curve. Among them, the full-cycle settlement-time curve, with time as the horizontal axis and total settlement as the vertical axis, can intuitively reflect the real-time change law of soft soil foundation settlement during the entire process of random multi-stage loading, and can be used for engineering design, construction control and settlement prediction.

[0049] It should be noted that, in the embodiments of this application, the same loading can be further subdivided into multiple levels, thereby enabling accurate simulation of random, irregular, and multi-time-period changing loading paths, and the entire process adopts the basic formula of one-dimensional consolidation, without the need for complex calculations.

[0050] The following section provides a detailed explanation of the method for calculating consolidation settlement of soft soil foundations applicable to random multi-stage loading, using specific examples.

[0051] Boundary conditions: Total strip load =80kPa, load classification number =10. The x and y coordinates of the corner point of the trapezoidal strip load are (0,0;10,0;7.75,4;2.25,4). Calculate the coordinates of the point. =5m, formation pulse depth =0m, total stratum thickness =10m, number of stratigraphic layers =20, internal friction angle =6 degrees, cohesion =6kPa, initial modulus =2MPa, natural bulk density =17kN / m 3 Stress ratio correction factor =1.

[0052] Soil compression modulus =1 MPa, the specific gravity of water =10kN / m 3 Single-sided drainage depth =10m, vertical permeability coefficient of soil layer =1e-7cm / s, horizontal permeability coefficient of soil layer =1e-7cm / s, depth of plastic drainage belt =10m, thickness of plastic drainage board =0.004m, width of plastic drainage board =0.1m, drainage board spacing =1m, effective drainage coefficient of triangular arrangement =1.05, horizontal penetration coefficient of the coating area =3.33e-8cm / s, permeability coefficient of plastic drainage board =10cm / s, the ratio of the diameter of the smeared area to the equivalent diameter =2.5, consolidation time =180 days, loading levels =10, loading time per level =1, 3, 5, 7, 9, 14, 16, 18, 20, 22 (days), loading calculation time length =356 days, calculation time =60, 180, 365 (days).

[0053] Calculate the total settlement at the midpoint of the load. =1123mm, settlement per load level =72, 77, 83, 89, 97, 107, 119, 134, 156, 189 (mm).

[0054] Total consolidation settlement on day 60 with drainage measures (60) = 639 mm, degree of consolidation (60) = 57%, consolidation settlement under conditions without drainage measures (60) = 85 mm, degree of consolidation (60) = 8%.

[0055] Total consolidation settlement on day 180 with drainage measures (180) = 1059 mm, degree of consolidation (180) = 94%; Total consolidation settlement under conditions without drainage measures (180) = 152 mm, degree of consolidation (180) = 14%.

[0056] Total consolidation settlement on day 365 with drainage measures (365) = 1120 mm, degree of consolidation (365) = 99.7%; Total consolidation settlement under conditions without drainage measures (365) = 221 mm, degree of consolidation (365) = 20%.

[0057] Load profile, graded strip profile and settlement curve as shown in Figure 2 As shown, the full-cycle settlement-time curve is as follows: Figure 3 As shown, there is a significant difference in consolidation settlement with and without drainage treatment.

[0058] The above describes the method for calculating consolidation settlement of soft soil foundations under random multi-stage loading, as described in the embodiments of this application. It can be recognized that the embodiments of this application have the following advantages: I. Based on one-dimensional consolidation theory, without considering rheology and secondary consolidation, random multi-level loading is divided into multiple independent loads, which can directly adapt to complex loading conditions with random multi-level, irregularity, and different intensities at different times.

[0059] Second, the total settlement and degree of consolidation of each load level are calculated independently. The degree of consolidation varies under different loads at the same time, which is more consistent with the actual consolidation process.

[0060] Third, the total consolidation settlement is obtained by superimposing the settlement at each level in real time. The physical meaning is clear, the formula is simple, and it is easy to use in engineering.

[0061] Fourth, it requires no complex theories or numerical models, has high computational efficiency and reliable accuracy, and is suitable for rapid prediction and design calculations in on-site engineering.

[0062] Reference Figure 4 This application also provides a system for calculating consolidation settlement of soft soil foundations under random multi-stage loading, comprising: The parameter acquisition module is used to acquire the physical and mechanical parameters of the soft soil foundation, drainage conditions, and the actual load-time curve within the target period. The load division module is used to divide the random multi-level loading process into multiple load levels based on the actual loading-time curve. Each load level corresponds to a unique application time, load magnitude, and holding time. The first calculation module is used to calculate the total settlement of each load level under individual action based on physical and mechanical parameters. The second calculation module is used to calculate the degree of consolidation of each load level at any time, based on the one-dimensional consolidation theory, physical and mechanical parameters, and drainage conditions, starting from the application time of each load level. The third calculation module is used to calculate the consolidation settlement component of each applied load at any time, based on the total settlement and degree of consolidation of each stage, starting from the time of application of the first stage load. The fourth calculation module is used to accumulate the consolidation settlement component of each applied load at any time step by step to obtain the total consolidation settlement of the entire random multi-level loading process.

[0063] It is understood that the content of the above method embodiments is applicable to this system embodiment. The specific functions implemented in this system embodiment are the same as those in the above method embodiments, and the beneficial effects achieved are also the same as those achieved in the above method embodiments.

[0064] This application also provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the above-described method. This electronic device can be any smart terminal, including tablet computers, in-vehicle computers, etc.

[0065] It is understood that the content of the above method embodiments is applicable to this device embodiment. The specific functions implemented by this device embodiment are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0066] Please see Figure 5 , Figure 5 The hardware structure of an electronic device according to another embodiment is illustrated. The electronic device includes: The processor 1001 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this application. The memory 1002 can be implemented as a read-only memory (ROM), static storage device, dynamic storage device, or random access memory (RAM). The memory 1002 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 1002 and is called and executed by the processor 1001 using the methods described in the embodiments of this application. Input / output interface 1003 is used to implement information input and output; The communication interface 1004 is used to enable communication and interaction between this device and other devices. Communication can be achieved through wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.). Bus 1005 transmits information between various components of the device (e.g., processor 1001, memory 1002, input / output interface 1003, and communication interface 1004); The processor 1001, memory 1002, input / output interface 1003 and communication interface 1004 are connected to each other within the device via bus 1005.

[0067] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method.

[0068] It is understood that the content of the above method embodiments is applicable to this storage medium embodiment. The specific functions implemented in this storage medium embodiment are the same as those in the above method embodiments, and the beneficial effects achieved are also the same as those achieved in the above method embodiments.

[0069] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0070] It is understood that the content of the above method embodiments is applicable to the embodiments of this program product. The specific functions implemented by the embodiments of this program product are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0071] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0072] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0073] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0074] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0075] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0076] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0077] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0078] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0079] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0080] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0081] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0082] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A method for calculating the consolidation settlement of soft soil foundation suitable for random multi-stage loading, characterized in that, Includes the following steps: Obtain the physical and mechanical parameters of the soft soil foundation, drainage conditions, and the actual load-time curves within the target period; Based on the actual loading-time curve, the random multi-level loading process is divided into multi-level loads, wherein each level of the load corresponds to a unique application time, load magnitude, and holding time. Based on the physical and mechanical parameters, calculate the total settlement of each load level under individual action; Based on the one-dimensional consolidation theory, according to the physical and mechanical parameters and the drainage conditions, the degree of consolidation of each load level at any time is calculated, starting from the application time of each load level. Based on the total settlement of the grades and the degree of consolidation, starting from the application time of the first grade load, calculate the consolidation settlement component of each grade of applied load at any time. The consolidation settlement components of each applied load at any time are accumulated step by step to obtain the total consolidation settlement of the entire random multi-level loading process.

2. The method of claim 1, wherein, The step of dividing the random multi-stage loading process into multi-stage loads based on the actual loading-time curve specifically includes: Determine the total load, the number of load grades, and the coordinates of the corner points and calculation points of the actual load-time curve; Based on the total load and the number of load levels, the actual loading-time curve is divided to obtain multiple load levels. Based on the corner coordinates and the calculation point coordinates, calculate the width, maximum width, height of each load level, and the coordinates of the calculation point relative to each load level.

3. The method of claim 1, wherein, The calculation of the total settlement of each load level under individual action based on the physical and mechanical parameters specifically includes: Based on the physical and mechanical parameters, calculate the depth, ultimate bearing capacity, and additional stress of each stratum under individual loads. Calculate the tangent modulus of each stratum based on the physical and mechanical parameters and the ultimate bearing capacity; Based on the depth, the tangent modulus, and the additional stress, calculate the settlement of each load level in each stratum. The settlement amounts of each load level in each stratum are summed to obtain the total settlement amount of each load level under individual action.

4. The method of claim 1, wherein, The drainage conditions include conditions with and without drainage measures. Based on one-dimensional consolidation theory, and according to the physical and mechanical parameters and the drainage conditions, the degree of consolidation of each load level at any given time is calculated, starting from the application time of each load level. Specifically, this includes: With drainage measures in place, starting from the application time of each load level, the first degree of consolidation of each load level at any time is calculated based on the Terzaghi consolidation formula in one-dimensional consolidation theory and the radial consolidation considering the resistance of the smeared well, according to the physical and mechanical parameters. Without drainage measures, starting from the application time of each load level, the second degree of consolidation of each load level at any time is calculated based on the Terzaghi consolidation degree formula in one-dimensional consolidation theory and the physical and mechanical parameters. The degree of consolidation of different load levels at the same application time is different.

5. The method of claim 4, wherein, The step of calculating the consolidation settlement component of each applied load at any time, based on the total settlement and the degree of consolidation, taking the application time of the first level of load as the starting point, specifically includes: With drainage measures in place, starting from the time when the load of that level is applied, the total settlement of each level of load is multiplied by the corresponding first degree of consolidation to obtain the first consolidation settlement of each level of load at any time. Then, based on the first consolidation settlement, the first consolidation settlement component of each level of applied load at any time is obtained. Without drainage measures, starting from the time when the load of each level is applied, the total settlement of each level of load is multiplied by the corresponding second degree of consolidation to obtain the second consolidation settlement of each level of load at any time. Then, based on the first consolidation settlement, the second consolidation settlement component of each level of applied load at any time is obtained.

6. The method of claim 5, wherein, The step of summing up the consolidation settlement components at any given time for each applied load level to obtain the total consolidation settlement for the entire random multi-level loading process specifically includes: With drainage measures in place, the first consolidation settlement component of each applied load at any time is accumulated step by step to obtain the first total consolidation settlement of the entire random multi-level loading process. Without drainage measures, the second consolidation settlement component of each applied load at any time is accumulated step by step to obtain the second total consolidation settlement of the entire random multi-level loading process.

7. The method according to any one of claims 1 to 6, characterized in that, The method further includes: Based on the total consolidation settlement during the entire random multi-stage loading process, a full-cycle settlement-time curve is constructed.

8. A system for calculating the consolidation settlement of soft ground suitable for random multi-stage loading, characterized by, include: The parameter acquisition module is used to acquire the physical and mechanical parameters of the soft soil foundation, drainage conditions, and the actual load-time curve within the target period. The load division module is used to divide the random multi-level loading process into multiple load levels according to the actual loading-time curve, wherein each load level corresponds to a unique application time, load magnitude and holding time. The first calculation module is used to calculate the total settlement of each load level under individual action based on the physical and mechanical parameters. The second calculation module is used to calculate the degree of consolidation of each load level at any time, based on the one-dimensional consolidation theory, according to the physical and mechanical parameters and the drainage conditions, taking the application time of each load level as the starting point. The third calculation module is used to calculate the consolidation settlement component of each applied load at any time, based on the total graded settlement and the degree of consolidation, taking the application time of the first grade load as the starting point. The fourth calculation module is used to accumulate the consolidation settlement component of each applied load at any time to obtain the total consolidation settlement of the entire random multi-level loading process.

9. An electronic device, comprising: The electronic device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the method of any one of claims 1 to 7.

10. A storage medium, the storage medium being a computer-readable storage medium for computer-readable storage, characterized in that, The storage medium stores one or more programs, which are executable by one or more processors to implement the method according to any one of claims 1 to 7. The storage medium stores one or more programs, which are executable by one or more processors to implement the method according to any one of claims 1 to 7.

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