CN116776641B - Method and device for evaluating shallow foundation horizontal bearing capacity on clay seabed - Google Patents
Method and device for evaluating shallow foundation horizontal bearing capacity on clay seabed Download PDFInfo
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Abstract
The invention relates to the technical field of ocean engineering, and discloses a method and a device for evaluating the horizontal bearing capacity of a shallow foundation on a clay seabed. According to the method for evaluating the horizontal bearing capacity of the shallow foundation on the clay seabed, provided by the invention, the seabed soil and the circulating wave load parameters corresponding to the preset time are collected at each preset time in the preset period, the three-dimensional seabed soil model corresponding to the preset time is reconstructed, and the circulating wave load parameters at the preset time are continuously applied to the shallow foundation model within the preset time starting from the preset time, so that the horizontal bearing capacity of the shallow foundation at the next preset time is measured. The horizontal bearing capacity corresponding to the shallow foundation at each moment in the whole period is obtained in such a way, and the obtained horizontal bearing capacity is higher in authenticity, so that the generated evaluation strategy is higher in accuracy, disasters such as slippage and overturning of the shallow foundation are avoided, and property loss is reduced.
Description
Technical Field
The invention relates to the technical field of ocean engineering, in particular to a method and a device for evaluating the horizontal bearing capacity of a shallow foundation on a clay seabed.
Background
The development and utilization scale of ocean resources is increasingly large, and the application of shallow foundations in ocean geotechnical engineering is also increasingly wide. The cyclic wave load is one of the most common loads in the marine environment, and can generate continuous and variable horizontal load on the shallow foundation on the seabed, so that the bearing capacity and stability of the shallow foundation are greatly influenced, and disasters such as slippage and capsizing of the shallow foundation are easily caused. Therefore, the method for researching the weakening degree of the horizontal bearing capacity of the shallow foundation on the clay seabed under the action of the cyclic wave load has obvious significance for designing the bearing capacity of the shallow foundation and preventing disaster risks.
At present, the research on the bearing capacity of the shallow foundation on the seabed is concentrated on the aspect of consolidation bearing capacity, and the research on the horizontal bearing capacity of the shallow foundation on the clay seabed under the action of cyclic wave load is obviously insufficient. The shallow foundation on the clay seabed is acted by the cyclic wave load for a long time, and the hyperstatic pore water pressure is continuously accumulated along with the change of time, so that the effective stress of the soil body is gradually reduced, and the shallow foundation is further caused to slip and overturn. Moreover, the existing research is slightly deficient in terms of a simplified evaluation method of the shallow foundation horizontal bearing capacity, and cannot provide the horizontal bearing capacity condition of the shallow foundation full service period.
Therefore, it is important to provide a method for evaluating the horizontal bearing capacity of a shallow foundation on a clay seabed under the action of cyclic wave load.
Disclosure of Invention
In view of the above, the present invention provides a method and apparatus for evaluating the horizontal bearing capacity of shallow foundation on clay seabed, so as to solve the problem that the horizontal bearing capacity of shallow foundation full service period cannot be provided in the related art.
In a first aspect, the invention provides a method for evaluating shallow foundation horizontal bearing capacity on a clay seabed, the method comprising:
calibrating the seabed soil collected at a first moment to obtain soil parameters, wherein the first moment is any one of a plurality of preset moments in a preset period; constructing a three-dimensional seabed soil model based on soil parameters and a preset construction mode, and embedding a pre-constructed shallow foundation model into the three-dimensional seabed soil model according to a preset depth, wherein the soil parameters correspond to the preset construction mode; acquiring a cyclic wave load parameter at a first moment; continuously applying a cyclic wave load parameter to the shallow foundation model within a preset duration, and measuring the horizontal bearing capacity corresponding to the second moment, wherein the preset duration takes the first moment as a starting moment and the second moment as a finishing moment; generating an evaluation strategy based on each preset time and the horizontal bearing capacity corresponding to each preset time when the first time is the last preset time in the preset period; and (3) evaluating the horizontal bearing capacity of the shallow foundation model based on the evaluation strategy and the circulating wave load parameters corresponding to each preset moment respectively.
Because waves continuously act on the shallow foundation and the seabed soil in the whole period of the shallow foundation service, the seabed soil and the structure of the shallow foundation are changed continuously along with time under the cyclic impact of the waves, and therefore the horizontal bearing capacity of the shallow foundation is changed at different moments. According to the method for evaluating the horizontal bearing capacity of the shallow foundation on the clay seabed, the seabed soil and the circulating wave load parameters corresponding to the preset time are collected at each preset time in the preset period, the three-dimensional seabed soil model corresponding to the preset time is reconstructed, the circulating wave load parameters at the preset time are continuously applied to the shallow foundation model within the preset time starting from the preset time, and therefore the horizontal bearing capacity of the shallow foundation at the next preset time is measured. The horizontal bearing capacity corresponding to the shallow foundation at each moment in the whole period is obtained in such a way, and the obtained horizontal bearing capacity is higher in authenticity, so that the generated evaluation strategy is higher in accuracy, disasters such as slippage and overturning of the shallow foundation are avoided, and property loss is reduced.
In an alternative embodiment, the soil parameters include: vertical effective stress, initial reference pore ratio, compression index, water volume weight, soil permeability coefficient and soil consolidation time.
In an alternative embodiment, the preset time is determined in the following manner:
when the first moment is the first preset moment in a preset period, determining a service sub-period based on soil parameters and the geometric dimension of the shallow foundation model, wherein the preset period comprises the service sub-period; dividing the service sub-period into a plurality of time periods in equal proportion according to the preset duration, and taking the starting time of each time period as the preset time.
In an alternative embodiment, determining the service sub-period based on soil parameters and geometry of the shallow base model includes:
determining a compressive modulus based on the vertical effective stress, the initial reference pore ratio, and the compressive index; determining a consolidation coefficient based on the compression modulus, the volume weight of water, and the permeability coefficient of the soil; and determining a service sub-period based on the consolidation coefficient, the soil consolidation time and the geometric dimension.
In an alternative embodiment, generating an evaluation policy based on each preset time and a horizontal bearing capacity corresponding to each preset time includes:
fitting each preset time and the horizontal bearing capacity corresponding to each preset time respectively to generate a shallow foundation horizontal bearing capacity weakening curve, and evaluating the strategy as the shallow foundation horizontal bearing capacity weakening curve.
The evaluation strategy in the embodiment is embodied in a curve mode, so that the defect that the horizontal bearing capacity condition in the shallow foundation full service period cannot be provided in the related technology is overcome, and the efficiency of work and judgment is improved due to the simple fitting mode, the intuitiveness and the clarity of the curve.
In an alternative embodiment, the cyclic wave load parameter includes a cyclic wave load amplitude, and estimating the horizontal bearing capacity of the shallow foundation model based on the estimation strategy and the cyclic wave load parameter corresponding to each preset time, including:
screening out the maximum value of the cyclic wave load amplitude values from the cyclic wave load amplitude values respectively corresponding to the preset moments; determining the minimum value of the horizontal bearing capacity from the shallow foundation horizontal bearing capacity weakening curve; comparing the minimum value of the horizontal bearing capacity with the maximum value of the cyclic wave load amplitude to generate a comparison result; and evaluating the horizontal bearing capacity of the shallow foundation model based on the comparison result.
According to the method, the maximum value of the load amplitude of the circulating waves in the whole period is compared with the minimum value of the horizontal bearing capacity of the shallow foundation in the whole period, so that the bearing level of the horizontal bearing capacity of the shallow foundation can be accurately estimated, a user can conveniently judge whether the current shallow foundation model can be put into use or not, and disasters such as slippage and overturning of the shallow foundation caused by weak bearing capacity of the horizontal bearing capacity of the shallow foundation are avoided.
In an alternative embodiment, evaluating the horizontal load bearing capacity of the shallow base model based on the comparison results includes:
and when the comparison result is that the minimum value of the horizontal bearing capacity is smaller than or equal to the maximum value of the cyclic wave load amplitude, determining that the horizontal bearing capacity of the shallow foundation model is weak.
In an alternative embodiment, after determining that the horizontal bearing capacity of the shallow foundation model is weak, the method further comprises:
the dimensions and the embedding depth of the shallow foundation model are adjusted, and the horizontal bearing capacity of the adjusted shallow foundation model is estimated by reusing the estimation method of the first aspect or any implementation mode corresponding to the first aspect.
According to the embodiment, the shallow foundation model with high horizontal bearing capacity is determined through continuous adjustment and evaluation, so that the actual production application of the shallow foundation is performed based on the corresponding size and the embedding depth of the shallow foundation model, and the service quality of the shallow foundation in the service period is indirectly ensured.
In a second aspect, the present invention provides an apparatus for estimating the horizontal bearing capacity of a shallow foundation on a clay seabed, the apparatus comprising:
the calibration module is used for calibrating the seabed soil collected at the first moment to obtain soil parameters, wherein the first moment is any one of a plurality of preset moments in a preset period; the construction module is used for constructing a three-dimensional seabed soil model based on soil parameters and a preset construction mode, and embedding the pre-constructed shallow foundation model into the three-dimensional seabed soil model according to a preset depth, wherein the soil parameters correspond to the preset construction mode; the acquisition module is used for acquiring the circulating wave load parameter at the first moment; the measuring module is used for continuously applying the cyclic wave load parameter to the shallow foundation model within a preset time length, measuring the horizontal bearing capacity corresponding to the second moment, wherein the preset time length takes the first moment as the starting moment and takes the second moment as the ending moment; the generating module is used for generating an evaluation strategy based on each preset time and the horizontal bearing capacity corresponding to each preset time respectively until the first time is the last preset time in the preset period; the evaluation module is used for evaluating the horizontal bearing capacity of the shallow foundation model based on the evaluation strategy and the circulating wave load parameters corresponding to each preset moment respectively.
In an alternative embodiment, the soil parameters in the calibration module include: vertical effective stress, initial reference pore ratio, compression index, water volume weight, soil permeability coefficient and soil consolidation time.
In an alternative embodiment, the calibration module includes:
the determining sub-module is used for determining a service sub-period based on soil parameters and the geometric dimension of the shallow foundation model when the first moment is the first preset moment in a preset period, wherein the preset period comprises the service sub-period; the dividing sub-module is used for dividing the service sub-period into a plurality of time periods according to the preset time length in equal proportion, and taking the starting time of each time period as the preset time.
In an alternative embodiment, determining the sub-module includes:
a first determination unit for determining a compression modulus based on the vertical effective stress, the initial reference void ratio, and the compression index; a second determining unit for determining a consolidation coefficient based on the compression modulus, the volume weight of water and the permeability coefficient of soil; and the third determining unit is used for determining the service subcycle based on the consolidation coefficient, the soil body consolidation time and the geometric dimension.
In an alternative embodiment, the generating module includes:
The fitting sub-module is used for fitting each preset time and the horizontal bearing capacity corresponding to each preset time respectively to generate a shallow foundation horizontal bearing capacity weakening curve, and the evaluation strategy is the shallow foundation horizontal bearing capacity weakening curve.
In a third aspect, the present invention provides a computer device comprising: the processor is in communication connection with the memory, and the memory stores computer instructions, and the processor executes the computer instructions to perform the method for evaluating the shallow foundation horizontal bearing capacity on the clay seabed according to the first aspect or any of the corresponding embodiments.
In a fourth aspect, the present invention provides a computer-readable storage medium having stored thereon computer instructions for causing a computer to perform the method of assessing shallow foundation horizontal bearing capacity on a clay seabed of the first aspect or any of its corresponding embodiments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for evaluating shallow foundation horizontal bearing capacity on a clay seabed according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for estimating shallow foundation horizontal bearing capacity on a clay seabed according to an embodiment of the present invention;
FIG. 3 is a block diagram of an evaluation apparatus for shallow foundation horizontal bearing capacity on a clay seabed according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a hardware structure of a computer device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The development and utilization scale of ocean resources is increasingly large, and the application of shallow foundations in ocean geotechnical engineering is also increasingly wide. Because shallow foundations on clay seabed are acted by cyclic wave load for a long time, the hyperstatic pore water pressure can be accumulated continuously along with the change of time, so that the effective stress of soil is gradually reduced, and the shallow foundations slip and overturn are caused. However, the existing research is slightly deficient in terms of a simplified evaluation method of the horizontal bearing capacity of the shallow foundation, and cannot provide the horizontal bearing capacity condition of the full service period of the shallow foundation. The embodiment of the invention provides a method for evaluating the horizontal bearing capacity of a shallow foundation on a clay seabed, which is used for obtaining an evaluation strategy of the horizontal bearing capacity by measuring the horizontal bearing capacity corresponding to each preset moment in a preset period, so that the evaluation of the horizontal bearing capacity of the shallow foundation is completed, and disasters such as slippage, overturning and the like of the shallow foundation are avoided.
In accordance with an embodiment of the present invention, there is provided an embodiment of a method for evaluating shallow foundation horizontal bearing capacity on a clay seabed, it being noted that the steps shown in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and, although a logical sequence is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than that shown herein.
In this embodiment, a method for evaluating the shallow foundation horizontal bearing capacity on the clay seabed is provided, which can be used in a computer device, and fig. 1 is a flowchart of a method for evaluating the shallow foundation horizontal bearing capacity on the clay seabed according to an embodiment of the present invention, as shown in fig. 1, the flowchart includes the following steps:
and step S101, calibrating the seabed soil collected at the first moment to obtain soil parameters.
Specifically, the first time is any one of a plurality of preset times in a preset period, and the preset period is a service period of a shallow foundation, such as 5 years or 3 years. The shallow foundation service period may be determined based on the actual application scenario of the shallow foundation, and is not specifically limited herein.
Specifically, the calibration mode of the seabed soil corresponds to the soil parameters, the calibration modes are different, and the obtained soil parameters are different. Therefore, the calibration mode of the soil parameters is not specifically limited herein, and those skilled in the art can make corresponding selections based on the required soil parameters. For example, the seabed soil can be calibrated in the modes of direct shear test, sand layer vibration liquefaction test, infinite side compressive strength, consolidation test, triaxial compression test and the like, so that soil parameters corresponding to the calibration modes are obtained.
Step S102, a three-dimensional seabed soil model is built based on soil parameters and a preset building mode, and the pre-built shallow foundation model is embedded into the three-dimensional seabed soil model according to a preset depth.
Specifically, the soil parameters correspond to the preset construction mode. As can be seen from the description in step S101, the soil parameters correspond to the calibration mode, so when any one of the preset construction mode, the soil parameters, and the calibration mode is determined, the other two are determined. It should be noted that, the preset construction mode, that is, the construction mode of the three-dimensional seabed soil model, is not particularly limited, and a person skilled in the art may select according to actual needs. For example, a three-dimensional seabed soil model can be constructed by a molar coulomb model or a small strain model and the like.
Specifically, when the three-dimensional seabed soil model is constructed, the soil parameters obtained in the step S101 are required to be input into a construction model corresponding to a preset construction mode, so that the finally obtained three-dimensional seabed soil model is kept consistent with the seabed soil collected on the engineering site as much as possible.
Specifically, the preset depth, that is, the depth of the shallow foundation embedded into the three-dimensional seabed soil under normal conditions, can be adjusted according to practical conditions, and is not particularly limited herein.
Step S103, acquiring a cyclic wave load parameter at a first moment.
Specifically, the cyclic wave load parameters include wave load frequency, wave load amplitude, and the like. The cyclic wave load parameter can be obtained by a wave meter. The wave meter is an instrument for observing the space-time distribution characteristic of waves, and uses a pressure sensor to measure the pressure of waves on the water surface, and converts the measured signals into electric signals for processing and displaying, so that the cyclic wave load parameters can be provided. In this embodiment, the method for obtaining the cyclic wave load parameter is not particularly limited, and can be freely selected by those skilled in the art.
And step S104, continuously applying a cyclic wave load parameter to the shallow foundation model within a preset time period, and measuring the horizontal bearing capacity corresponding to the second moment.
Specifically, the preset duration takes the first moment as the starting moment and the second moment as the ending moment. The time length between any two adjacent preset time points is the preset time length in a plurality of preset time points in the preset period. If the preset period is 1 month, the preset time is zero point of each day in the month, and then the preset time period is 1 day.
Step S105, generating an evaluation strategy based on each preset time and the horizontal bearing capacity corresponding to each preset time when the first time is the last preset time in the preset period.
Specifically, step S101 to step S104 are repeatedly executed until the horizontal bearing capacity at each preset time in the preset period is obtained, and an evaluation strategy is generated based on each preset time and the horizontal bearing capacity corresponding to each preset time, where the evaluation strategy is used to characterize the variation or fluctuation of the shallow basic horizontal bearing capacity in the preset period.
And S106, evaluating the horizontal bearing capacity of the shallow foundation model based on the evaluation strategy and the circulating wave load parameters corresponding to each preset moment.
Specifically, the horizontal bearing capacity of the shallow foundation model corresponding to each preset moment exists in the evaluation strategy, and the load applied to the shallow foundation model at each moment is included in the cyclic wave load parameter, so that the horizontal bearing capacity of the shallow foundation model is evaluated based on the evaluation strategy and the cyclic wave load parameter.
Because waves continuously act on the shallow foundation and the seabed soil in the whole period of the shallow foundation service, the seabed soil and the structure of the shallow foundation are changed continuously along with time under the cyclic impact of the waves, and therefore the horizontal bearing capacity of the shallow foundation is changed at different moments. According to the method for evaluating the horizontal bearing capacity of the shallow foundation on the clay seabed, the seabed soil and the circulating wave load parameters corresponding to the preset time are collected at each preset time in the preset period, the three-dimensional seabed soil model corresponding to the preset time is reconstructed, the circulating wave load parameters at the preset time are continuously applied to the shallow foundation model within the preset time starting from the preset time, and therefore the horizontal bearing capacity of the shallow foundation at the next preset time is measured. The horizontal bearing capacity corresponding to the shallow foundation at each moment in the whole period is obtained in such a way, and the obtained horizontal bearing capacity is higher in authenticity, so that the generated evaluation strategy is higher in accuracy, disasters such as slippage and overturning of the shallow foundation are avoided, and property loss is reduced.
In the present embodiment, the above step S101 is further defined.
And step S101, calibrating the seabed soil collected at the first moment to obtain soil parameters.
In this embodiment, the seabed soil is calibrated by performing a consolidation experiment and a triaxial compression experiment, so as to obtain basic parameters, namely an initial compression parameter, a rebound parameter, an initial reference pore ratio, a poisson ratio, a permeability coefficient, a water volume weight, an internal friction angle, a vertical effective stress and soil consolidation time. The internal friction angle and the vertical effective stress are obtained through a triaxial compression test, and the rest basic parameters are obtained through a consolidation test.
After the basic parameters are obtained, the initial compression parameters are transformed to obtain target compression parameters; transforming the rebound parameters to obtain an expansion index; and (5) converting the internal friction angle to obtain the critical state stress ratio.
(1) The target compression parameters are determined in the following ways:
wherein,for the target compression parameter +.>Is the initial compression parameter.
(2) The expansion index is determined in the following manner:
wherein,for the expansion index>Is a rebound parameter.
(3) The critical state stress ratio is determined in the following manner:
wherein,is critical state stress ratio, + >Is the internal friction angle.
After the parameters are obtained, the soil parameters are composed of target compression parameters, expansion indexes, critical state stress ratio, initial reference pore ratio, poisson ratio, permeability coefficient, water volume weight, vertical effective stress and soil consolidation time.
Illustratively, in this embodiment, the preset time is determined as follows:
and a step a1, when the first moment is the first preset moment in a preset period, determining a service sub-period based on the soil parameters and the geometric dimension of the shallow foundation model, wherein the preset period comprises the service sub-period.
Step a11, determining the compression modulus based on the vertical effective stress, the initial reference pore ratio and the compression index.
Specifically, the compression modulus is determined by:
wherein,for compression modulus>For the compression index>For the initial reference void ratio, +.>Is the vertical effective stress.
Step a12, determining a consolidation coefficient based on the compression modulus, the volume weight of water and the permeability coefficient of soil.
Specifically, the consolidation coefficient is determined in the following manner:
wherein,for consolidation coefficient, +.>Is the permeability coefficient of soil->Is the volume weight of water, the%>Is the compression modulus.
Step a13, determining a service sub-period based on the consolidation coefficient, the soil body consolidation time and the geometric dimension.
Specifically, the service sub-period is determined in the following manner:
wherein,for service subcycle +.>For consolidation coefficient, +.>For soil body consolidation time, & lt + & gt>Is a shallow base geometry.
And a2, dividing the service sub-period into a plurality of time periods in equal proportion according to the preset duration, and taking the starting time of each time period as the preset time.
Specifically, the preset duration may be determined by one skilled in the art, and is not specifically limited herein. The shorter the preset time length is, the more the number of preset time is, and the higher the accuracy of the finally obtained evaluation strategy is. Conversely, the longer the preset duration, the fewer the number of preset moments, and the coarser the evaluation strategy will be.
For example, the service sub-period is 4 months of a certain year, 30 days are taken, and the preset time is 5 days, then 30 days can be divided into 6 time periods, and the starting time of the 6 time periods, namely 4 months 1 day zero point, 4 months 6 day zero point, 4 months 11 day zero point, 4 months 16 day zero point, 4 months 21 day zero point and 4 months 26 day zero point are respectively taken as preset time.
In the present embodiment, the above step S102 is further defined.
Step S102, a three-dimensional seabed soil model is built based on soil parameters and a preset building mode, and the pre-built shallow foundation model is embedded into the three-dimensional seabed soil model according to a preset depth.
In this embodiment, the lower load surface modified cambridge model is used to construct a three-dimensional seabed soil model, and in the construction process, the soil parameters acquired in the step S101 need to be input into the lower load surface modified cambridge model to ensure that the constructed three-dimensional seabed soil model is closer to the seabed soil of the actual engineering site. The lower load surface correction Cambridge model in the embodiment is a constitutive model for simulating the mechanical characteristics of a soil body, and the weakening degree of the shallow foundation horizontal bearing capacity of the clay seabed under the action of cyclic wave load can be accurately represented because the model can consider the super-consolidation of the soil body and the mechanical characteristics of the soil body under the action of cyclic load.
In this embodiment, a method for evaluating the shallow foundation horizontal bearing capacity of a clay seabed is provided, which may be used in a computer device, and fig. 2 is a flowchart of a method for evaluating the shallow foundation horizontal bearing capacity of a clay seabed according to an embodiment of the present invention, as shown in fig. 2, the flowchart includes the following steps:
step S201, calibrating the seabed soil collected at the first moment to obtain soil parameters. Please refer to step S101 in the embodiment shown in fig. 1 in detail, which is not described herein.
Step S202, a three-dimensional seabed soil model is built based on soil parameters and a preset building mode, and the pre-built shallow foundation model is embedded in the three-dimensional seabed soil model according to a preset depth, wherein the soil parameters correspond to the preset building mode. Please refer to step S102 in the embodiment shown in fig. 1 in detail, which is not described herein.
Step S203, obtaining a cyclic wave load parameter at a first moment. Please refer to step S103 in the embodiment shown in fig. 1 in detail, which is not described herein.
And S204, continuously applying a cyclic wave load parameter to the shallow foundation model within a preset time period, and measuring the horizontal bearing capacity corresponding to the second moment. Please refer to step S104 in the embodiment shown in fig. 1 in detail, which is not described herein.
Step S205, generating an evaluation strategy based on each preset time and the horizontal bearing capacity corresponding to each preset time when the first time is the last preset time in the preset period.
In this embodiment, the generating process of the evaluation strategy includes fitting each preset time and the horizontal bearing capacity corresponding to each preset time to generate a shallow basic horizontal bearing capacity weakening curve, where the evaluation strategy is the shallow basic horizontal bearing capacity weakening curve. The evaluation strategy in the embodiment is embodied in a curve mode, so that the defect that the horizontal bearing capacity condition in the shallow foundation full service period cannot be provided in the related technology is overcome, and the efficiency of work and judgment is improved due to the simple fitting mode, the intuitiveness and the clarity of the curve.
Step S206, the horizontal bearing capacity of the shallow foundation model is estimated based on the estimation strategy and the circulating wave load parameters corresponding to the preset moments respectively.
Specifically, the step S206 includes:
step S2061, screening out the maximum value of the cyclic wave load amplitude from the cyclic wave load amplitudes corresponding to the preset moments.
In step S2062, the minimum level of the horizontal load bearing capacity is determined from the shallow base horizontal load bearing capacity weakening curve.
Step S2063, comparing the minimum value of the horizontal bearing capacity with the maximum value of the cyclic wave load amplitude, and generating a comparison result.
Step S2064, estimating the horizontal bearing capacity of the shallow foundation model based on the comparison result.
In some alternative embodiments, step S2064 described above includes:
and b1, when the comparison result is that the minimum value of the horizontal bearing capacity is smaller than or equal to the maximum value of the cyclic wave load amplitude, determining that the horizontal bearing capacity of the shallow foundation model is weak.
And b2, when the comparison result shows that the minimum value of the horizontal bearing capacity is larger than the maximum value of the cyclic wave load amplitude, determining that the horizontal bearing capacity of the shallow foundation model is strong, and indicating that the current shallow foundation model can be put into practical use.
According to the method, the maximum value of the load amplitude of the circulating waves in the whole period is compared with the minimum value of the horizontal bearing capacity of the shallow foundation in the whole period, so that the bearing level of the horizontal bearing capacity of the shallow foundation can be accurately estimated, a user can conveniently judge whether the current shallow foundation model can be put into use or not, and disasters such as slippage and overturning of the shallow foundation caused by weak bearing capacity of the horizontal bearing capacity of the shallow foundation are avoided.
In some alternative embodiments, after step b1 above,
the dimensions and the embedding depth of the shallow foundation model are adjusted, and the horizontal bearing capacity of the adjusted shallow foundation model is estimated by reusing the estimation method of the first aspect or any implementation mode corresponding to the first aspect.
According to the embodiment, the shallow foundation model with high horizontal bearing capacity is determined through continuous adjustment and evaluation, so that the actual production application of the shallow foundation is performed based on the corresponding size and the embedding depth of the shallow foundation model, and the service quality of the shallow foundation in the service period is indirectly ensured.
As a preferred embodiment of the embodiments of the present invention, the following describes the present invention in detail in connection with a practical application scenario.
Firstly, collecting seabed soil to be laid with a shallow foundation on an engineering site, and calibrating the collected seabed soil to obtain soil parameters. After obtaining the soil parameters, determining a service sub-period based on the soil parameters, and equally dividing the service sub-period according to preset time length to obtain n preset time points, namely、/>、…、/>The time periods formed between any two preset moments are respectively +. >、/>、…、/>. Meanwhile, a three-dimensional seabed soil model is built based on the obtained soil parameters and a preset building mode, and the pre-built shallow foundation model is embedded into the three-dimensional seabed soil model according to a preset depth.
Second, obtainThe cyclic wave load parameter at the moment and is +.>Applying the cyclic wave load parameter to the shallow foundation model continuously in a time period, wherein the cyclic wave load parameter is +.>Measuring the horizontal bearing capacity of a shallow foundation at the moment +.>Form data (+)>，/>）。
Again, atCollecting the seabed soil in the three-dimensional seabed soil model at any time, measuring the collected seabed soil,obtain->And (3) reconstructing a three-dimensional seabed soil model based on the acquired soil parameters, and re-embedding the shallow foundation model into the reconstructed seabed soil model. Acquisition->The cyclic wave load parameter at the moment and is +.>Applying the cyclic wave load parameter to the shallow foundation model continuously in a time period, wherein the cyclic wave load parameter is +.>Measuring the horizontal bearing capacity of a shallow foundation at the moment +.>Form data (+)>，/>). This operation is performed continuously until it is available (/ -)>，/>) And ending the iterative operation.
Finally, the data obtained at each moment，/>）、（/>，/>）、…、（/>，/>) Fitting is carried out, and a weakening curve of the shallow foundation horizontal bearing capacity in a preset period is obtained. And obtaining the minimum value of the horizontal bearing capacity in the whole period from the curve, screening the maximum value of the cyclic wave load amplitude from the cyclic wave load parameters corresponding to each moment, comparing the minimum value of the horizontal bearing capacity with the maximum value of the cyclic wave load amplitude, and evaluating the horizontal bearing capacity of the shallow foundation model according to the comparison result, so as to determine whether to put the parameters corresponding to the shallow foundation model into production.
In this embodiment, an apparatus for evaluating the shallow foundation horizontal bearing capacity on the clay seabed is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and will not be described again. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
The embodiment provides an apparatus for evaluating a shallow foundation horizontal bearing capacity on a clay seabed, as shown in fig. 3, comprising:
the calibration module 301 is configured to calibrate the seabed soil collected at a first moment to obtain a soil parameter, where the first moment is any one of a plurality of preset moments in a preset period.
The construction module 302 is configured to construct a three-dimensional seabed soil model based on soil parameters and a preset construction mode, and embed the pre-constructed shallow foundation model into the three-dimensional seabed soil model according to a preset depth, where the soil parameters correspond to the preset construction mode.
The acquiring module 303 is configured to acquire a cyclic wave load parameter at a first moment.
And the measurement module 304 is configured to continuously apply a cyclic wave load parameter to the shallow foundation model within a preset duration, measure a horizontal bearing capacity corresponding to the second moment, and take the first moment as a starting moment and the second moment as an ending moment for the preset duration.
The generating module 305 is configured to generate an evaluation policy based on each preset time and the horizontal bearing capacity corresponding to each preset time until the first time is the last preset time in the preset period.
And the evaluation module 306 is used for evaluating the horizontal bearing capacity of the shallow foundation model based on the evaluation strategy and the circulating wave load parameters corresponding to each preset moment respectively.
In some alternative embodiments, the soil parameters in the calibration module include: vertical effective stress, initial reference pore ratio, compression index, water volume weight, soil permeability coefficient and soil consolidation time.
In some alternative embodiments, calibration module 301 includes:
and the determining sub-module is used for determining the first time in a preset period based on the soil parameters and the geometric dimension of the shallow foundation model when the first time is the first preset time in the preset period, wherein the preset period comprises a service sub-period.
The dividing sub-module is used for dividing the service sub-period into a plurality of time periods in equal proportion, and taking the starting time of each time period as a preset time.
In some alternative embodiments, determining the sub-module includes:
a first determination unit for determining a compression modulus based on the vertical effective stress, the initial reference void ratio, and the compression index.
And a second determining unit for determining a consolidation coefficient based on the compression modulus, the volume weight of water and the permeability coefficient of soil.
And the third determining unit is used for determining the service subcycle based on the consolidation coefficient, the soil body consolidation time and the geometric dimension.
In some alternative embodiments, the generating module 305 includes:
the fitting sub-module is used for fitting each preset time and the horizontal bearing capacity corresponding to each preset time respectively to generate a shallow foundation horizontal bearing capacity weakening curve, and the evaluation strategy is the shallow foundation horizontal bearing capacity weakening curve.
In some alternative embodiments, the cyclic wave load parameter includes a cyclic wave load amplitude, and the evaluation module 306 includes:
and the screening sub-module is used for screening the maximum value of the cyclic wave load amplitude values from the cyclic wave load amplitude values respectively corresponding to the preset moments.
And the determining submodule is used for determining the minimum value of the horizontal bearing capacity from the shallow foundation horizontal bearing capacity weakening curve.
And the comparison sub-module is used for comparing the minimum value of the horizontal bearing capacity with the maximum value of the cyclic wave load amplitude value to generate a comparison result.
And the evaluation sub-module is used for evaluating the horizontal bearing capacity of the shallow foundation model based on the comparison result.
In some alternative embodiments, the evaluation sub-module includes:
and a fourth determining unit for determining that the horizontal bearing capacity of the shallow foundation model is weak when the comparison result is that the minimum value of the horizontal bearing capacity is less than or equal to the maximum value of the cyclic wave load amplitude.
In an alternative embodiment, after the fourth determining unit, further comprising:
and the adjusting unit is used for adjusting the size and the embedding depth of the shallow foundation model, and the horizontal bearing capacity of the adjusted shallow foundation model is estimated by reusing the estimation method of the first aspect or any implementation mode corresponding to the first aspect.
Further functional descriptions of the above respective modules and units are the same as those of the above corresponding embodiments, and are not repeated here.
An evaluation device of the shallow foundation horizontal bearing capacity on the clay seabed in this embodiment is presented in the form of a functional unit, here an ASIC (Application Specific Integrated Circuit ) circuit, a processor and a memory executing one or more software or fixed programs, and/or other devices that can provide the above functions.
The embodiment of the invention also provides computer equipment, which is provided with the device for evaluating the shallow foundation horizontal bearing capacity on the clay seabed shown in the figure 3.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a computer device according to an alternative embodiment of the present invention, as shown in fig. 4, the computer device includes: one or more processors 10, memory 20, and interfaces for connecting the various components, including high-speed interfaces and low-speed interfaces. The various components are communicatively coupled to each other using different buses and may be mounted on a common motherboard or in other manners as desired. The processor may process instructions executing within the computer device, including instructions stored in or on memory to display graphical information of the GUI on an external input/output device, such as a display device coupled to the interface. In some alternative embodiments, multiple processors and/or multiple buses may be used, if desired, along with multiple memories and multiple memories. Also, multiple computer devices may be connected, each providing a portion of the necessary operations (e.g., as a server array, a set of blade servers, or a multiprocessor system). One processor 10 is illustrated in fig. 4.
The processor 10 may be a central processor, a network processor, or a combination thereof. The processor 10 may further include a hardware chip, among others. The hardware chip may be an application specific integrated circuit, a programmable logic device, or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general-purpose array logic, or any combination thereof.
Wherein the memory 20 stores instructions executable by the at least one processor 10 to cause the at least one processor 10 to perform the methods shown in implementing the above embodiments.
The memory 20 may include a storage program area that may store an operating system, at least one application program required for functions, and a storage data area; the storage data area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, memory 20 may optionally include memory located remotely from processor 10, which may be connected to the computer device 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.
Memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk, or solid state disk; the memory 20 may also comprise a combination of the above types of memories.
The computer device also includes a communication interface 30 for the computer device to communicate with other devices or communication networks.
The embodiments of the present invention also provide a computer readable storage medium, and the method according to the embodiments of the present invention described above may be implemented in hardware, firmware, or as a computer code which may be recorded on a storage medium, or as original stored in a remote storage medium or a non-transitory machine readable storage medium downloaded through a network and to be stored in a local storage medium, so that the method described herein may be stored on such software process on a storage medium using a general purpose computer, a special purpose processor, or programmable or special purpose hardware. The storage medium can be a magnetic disk, an optical disk, a read-only memory, a random access memory, a flash memory, a hard disk, a solid state disk or the like; further, the storage medium may also comprise a combination of memories of the kind described above. It will be appreciated that a computer, processor, microprocessor controller or programmable hardware includes a storage element that can store or receive software or computer code that, when accessed and executed by the computer, processor or hardware, implements the methods illustrated by the above embodiments.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the appended claims.
Claims (9)
1. A method of evaluating shallow foundation horizontal bearing capacity on a clay seabed, the method comprising:
calibrating the seabed soil collected at a first moment to obtain soil parameters, wherein the first moment is any one of a plurality of preset moments in a preset period;
constructing a three-dimensional seabed soil model based on the soil parameters and a preset construction mode, and burying a pre-constructed shallow foundation model into the three-dimensional seabed soil model according to a preset depth, wherein the soil parameters correspond to the preset construction mode;
acquiring a cyclic wave load parameter at a first moment;
continuously applying the cyclic wave load parameter to the shallow foundation model within a preset time length, and measuring the horizontal bearing capacity corresponding to a second moment, wherein the preset time length takes the first moment as a starting moment and the second moment as a finishing moment;
generating an evaluation strategy based on the preset time and the horizontal bearing capacity respectively corresponding to the preset time until the first time is the last preset time in the preset period;
The horizontal bearing capacity of the shallow foundation model is estimated based on the estimation strategy and the circulating wave load parameters corresponding to each preset moment respectively;
the soil body parameters comprise: vertical effective stress, initial reference pore ratio, compression index, water volume weight, soil permeability coefficient and soil consolidation time;
the determination mode of the preset time is as follows:
when the first moment is the first preset moment in the preset period, determining a service sub-period based on the soil parameters and the geometric dimension of the shallow foundation model, wherein the preset period comprises the service sub-period;
dividing the service sub-period into a plurality of time periods in equal proportion according to the preset duration, and taking the starting time of each time period as the preset time;
the determining a service sub-period based on the soil parameters and the geometric dimensions of the shallow foundation model comprises the following steps:
determining a compressive modulus based on the vertical effective stress, an initial reference void ratio, and a compressive index;
determining a consolidation coefficient based on the compression modulus, the volume weight of the water, and the permeability coefficient of the soil;
and determining the service sub-period based on the consolidation coefficient, the soil consolidation time and the geometric dimension.
2. The method of claim 1, wherein generating the evaluation policy based on the respective preset times and the respective corresponding horizontal bearing capacities at the respective preset times comprises:
fitting the preset moments and the horizontal bearing capacity corresponding to the preset moments respectively to generate a shallow foundation horizontal bearing capacity weakening curve, wherein the evaluation strategy is the shallow foundation horizontal bearing capacity weakening curve.
3. The method of claim 2, wherein the cyclic wave load parameter comprises a cyclic wave load amplitude, and wherein the estimating the horizontal bearing capacity of the shallow foundation model based on the estimation strategy and the cyclic wave load parameter respectively corresponding to the preset moments comprises:
screening out the maximum value of the cyclic wave load amplitude values from the cyclic wave load amplitude values respectively corresponding to the preset moments;
determining the minimum value of the horizontal bearing capacity from the shallow foundation horizontal bearing capacity weakening curve;
comparing the minimum value of the horizontal bearing capacity with the maximum value of the cyclic wave load amplitude to generate a comparison result;
and evaluating the horizontal bearing capacity of the shallow foundation model based on the comparison result.
4. A method according to claim 3, wherein said evaluating the horizontal load bearing capacity of the shallow foundation model based on the comparison result comprises:
and when the comparison result is that the minimum value of the horizontal bearing capacity is smaller than or equal to the maximum value of the cyclic wave load amplitude, determining that the horizontal bearing capacity of the shallow foundation model is weak.
5. The method of claim 4, further comprising, after said determining that the horizontal loading capacity of the shallow base model is weak:
adjusting the size and the embedding depth of the shallow foundation model, and re-using the assessment method according to any one of claims 1 to 4 to assess the horizontal bearing capacity of the adjusted shallow foundation model.
6. An apparatus for evaluating the horizontal bearing capacity of a shallow foundation on a clay seabed, the apparatus comprising:
the calibration module is used for calibrating the seabed soil collected at a first moment to obtain soil parameters, wherein the first moment is any one of a plurality of preset moments in a preset period;
the construction module is used for constructing a three-dimensional seabed soil model based on the soil parameters and a preset construction mode, and burying a pre-constructed shallow foundation model into the three-dimensional seabed soil model according to a preset depth, wherein the soil parameters correspond to the preset construction mode;
The acquisition module is used for acquiring the circulating wave load parameter at the first moment;
the measuring module is used for continuously applying the cyclic wave load parameter to the shallow foundation model within a preset time length, and measuring the horizontal bearing capacity corresponding to a second moment, wherein the preset time length takes the first moment as a starting moment and the second moment as a finishing moment;
the generating module is used for generating an evaluation strategy based on the preset time and the horizontal bearing capacity respectively corresponding to the preset time until the first time is the last preset time in the preset period;
the evaluation module is used for evaluating the horizontal bearing capacity of the shallow foundation model based on the evaluation strategy and the circulating wave load parameters corresponding to the preset moments respectively;
the soil body parameters in the calibration module comprise: vertical effective stress, initial reference pore ratio, compression index, water volume weight, soil permeability coefficient and soil consolidation time;
the calibration module comprises:
a determining sub-module, configured to determine a service sub-period based on the soil parameter and the geometric dimension of the shallow base model when the first time is a first preset time in the preset period, where the preset period includes the service sub-period;
The segmentation submodule is used for equally dividing the service subcycle into a plurality of time segments according to the preset duration, and taking the starting time of each time segment as the preset time;
the determining submodule includes:
a first determination unit for determining a compression modulus based on the vertical effective stress, an initial reference void ratio, and a compression index;
a second determining unit for determining a consolidation coefficient based on the compression modulus, the volume weight of water and the permeability coefficient of the soil;
and a third determining unit, configured to determine the service sub-period based on the consolidation coefficient, the soil consolidation time and the geometric dimension.
7. The apparatus of claim 6, wherein the generating module comprises:
and the fitting sub-module is used for fitting the preset moments and the horizontal bearing forces corresponding to the preset moments respectively to generate a shallow basic horizontal bearing force weakening curve, and the evaluation strategy is the shallow basic horizontal bearing force weakening curve.
8. A computer device, comprising:
a memory and a processor in communication with each other, the memory having stored therein computer instructions which, upon execution, perform the method of assessing shallow foundation horizontal bearing capacity on a clay seabed of any of claims 1 to 5.
9. A computer-readable storage medium having stored thereon computer instructions for causing a computer to perform the method of assessing shallow foundation horizontal bearing capacity on a clay seabed according to any of claims 1 to 5.
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