A method and apparatus for geotechnical investigation analysis

Abstract

This invention provides a method and equipment for rock and soil geological exploration and analysis, belonging to the field of soil exploration technology. Specifically, it includes: determining a sampling pressure interval as a candidate pressure interval based on the degree of overlap between matching sampling pressure intervals for different soil types, and combining soil type data belonging to the matching sampling pressure interval; using the candidate pressure intervals and the sampling analysis data of the candidate pressure intervals, and combining the degree of overlap between the matching sampling pressure intervals and the candidate pressure intervals for soil types, determining the sampling processing methods for soil types in different candidate pressure intervals, thereby improving the accuracy of sampling processing.

Description

Technical Field

[0001] This invention belongs to the field of soil exploration technology, and in particular relates to a method and equipment for rock and soil geological exploration and analysis. Background Technology

[0002] In geotechnical engineering investigation, obtaining undisturbed soil samples and rock cores is crucial for acquiring the physical and mechanical parameters of the strata. Existing investigation methods typically employ drilling combined with samplers. For example, invention patent application CN202210303977.5, "Soft Soil Geological Investigation Device and Method," provides a similar technical solution, but it still has the following shortcomings:

[0003] When conducting soil sampling, if the pressure of the exploration and sampling equipment cannot be effectively controlled, it may be difficult to meet the requirements for the consistency of the sampled soil parameters or the degree of matching with the actual soil layer. Therefore, it is necessary to determine the analysis and processing method of pressure control intervals for different soil types based on the stability of sampling parameters in different pressure control intervals and their consistency with other pressure control intervals, so as to quickly obtain pressure control intervals suitable for the most soil types and thus improve the consistency and reliability of exploration and sampling processing. This has become an urgent technical problem to be solved.

[0004] To address the aforementioned technical problems, this application provides a method and equipment for rock and soil geological exploration and analysis. Summary of the Invention

[0005] To achieve the objectives of this invention, the following technical solution is adopted:

[0006] Specifically, this application provides a method for rock and soil geological exploration and analysis, which includes:

[0007] S1. Based on the geological survey data of rock and soil, determine the consistency of soil parameters in the sampling and processing process of rock and soil, use the consistency to determine the pressure control method in the sampling and processing process of different soil types, use the pressure control method in different soil types to determine the variation data of soil parameter sampling results of the soil type under different sampling and processing speeds, and determine the matching sampling pressure range of the soil type.

[0008] S2 determines the identification and processing method of the sampling pressure interval as a candidate pressure interval based on the degree of overlap of the matching sampling pressure intervals for different soil types and in combination with the soil type data of the sampling pressure interval belonging to the matching sampling pressure interval.

[0009] S3 utilizes the candidate pressure range and the sampling analysis data of the candidate pressure range, and combines the degree of overlap between the matching sampling pressure range of the soil type and the candidate pressure range to determine the sampling processing method for the soil type in different candidate pressure ranges.

[0010] The beneficial effects of this invention are as follows:

[0011] By utilizing the variation data of soil parameters under different sampling processing rates for different soil types, matching sampling pressure ranges for each soil type are determined. Within the framework of the established pressure control method (basic control method or other control methods), the most suitable "matching sampling pressure range" for the soil type is further screened from multiple candidate sampling pressure ranges. The core of this method is to evaluate the impact of different sampling processing rates on the sampling results and identify those pressure ranges that can maintain parameter stability under rate fluctuations. This ensures that subsequent sampling operations can be carried out under both efficient and robust conditions, thereby improving the accuracy and stability of soil sampling results.

[0012] By utilizing alternative pressure intervals and their sampling analysis data, as well as the overlap between soil type-matched sampling pressure intervals and alternative pressure intervals, the sampling processing methods for different soil types within different alternative pressure intervals are determined. Since different soil types have varying applicability to the same pressure interval, the number of alternative pressure intervals may not be greater than the number of soil types compatible with the already analyzed alternative pressure intervals. If well-matched alternative pressure intervals already exist, conducting comprehensive testing on all new alternative intervals across all soil types would be time-consuming and costly. Insufficient testing may also miss intervals with universal value. Therefore, considering the compatibility of existing alternative pressure intervals and their overlap with matching pressure intervals for each soil type, the sampling verification of each soil type is dynamically determined within specific alternative intervals. Ultimately, with minimal verification cost, the most effective pressure intervals compatible with the most soil types are selected, achieving efficient resource allocation.

[0013] Furthermore, the geological survey data includes sampling and processing procedures for different soil types and soil parameters obtained during different sampling and processing procedures.

[0014] Furthermore, the consistency of soil parameters during the sampling and processing of the soil and rock geology is determined based on the deviation rate of soil parameters between the sampling and processing processes of the soil type.

[0015] Furthermore, the method for determining the pressure control method during the soil type sampling and processing is as follows:

[0016] The deviation rate of soil parameters in different sampling and processing processes during the same sampling task is calculated based on the degree of consistency of soil parameters in different soil types during the sampling and processing process.

[0017] The deviation rate is used to determine the parameter variation sampling task in the soil type;

[0018] Using sampling task data with parameter variations in different soil types, a pressure control method is determined during the sampling and processing of the soil type.

[0019] Furthermore, the method for determining the matching sampling pressure range for the soil type is as follows:

[0020] S21 uses the variation data of soil parameter sampling results for the soil type at different sampling processing speeds to determine the variation data of soil parameter sampling results for the soil type at different sampling processing speeds within the sampling pressure range.

[0021] S22 uses the changing data to determine a stable sampling task within the sampling pressure range;

[0022] S23 determines the matching sampling pressure range for the soil type based on stable sampling task data within different sampling pressure ranges for the soil type.

[0023] In a second aspect, the present invention provides an apparatus comprising: a memory and a processor connected in communication, and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the aforementioned method for rock and soil geological exploration and analysis when running the computer program.

[0024] Other features and advantages will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0026] The above and other features and advantages of the present invention will become more apparent from a detailed description of exemplary embodiments thereof with reference to the accompanying drawings.

[0027] Figure 1 This is a flowchart of a method for rock and soil geological exploration and analysis.

[0028] Figure 2This is a flowchart illustrating the method for determining pressure control during soil type sampling and processing.

[0029] Figure 3 This is a flowchart illustrating the method for determining the matching sampling pressure range for soil types. Detailed Implementation

[0030] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0031] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended meaning of inclusion and that other elements / components / etc. may exist in addition to the listed elements / components / etc.

[0032] Example 1

[0033] To solve the above problems, according to one aspect of the present invention, such as Figure 1 As shown, a method for rock and soil geological exploration and analysis is provided, specifically including:

[0034] S1. Based on the geological survey data of rock and soil, determine the consistency of soil parameters in the sampling and processing process of rock and soil, use the consistency to determine the pressure control method in the sampling and processing process of different soil types, use the pressure control method in different soil types to determine the variation data of soil parameter sampling results of the soil type under different sampling and processing speeds, and determine the matching sampling pressure range of the soil type.

[0035] Furthermore, the geological survey data includes sampling and processing procedures for different soil types and soil parameters obtained during different sampling and processing procedures.

[0036] Furthermore, the consistency of soil parameters during the sampling and processing of the soil and rock geology is determined based on the deviation rate of soil parameters between the sampling and processing processes of the soil type.

[0037] Specifically, such as Figure 2 As shown, the method for determining the pressure control method during the soil type sampling and treatment process is as follows:

[0038] For different soil types, the most suitable pressure control method is dynamically determined based on the consistency of soil parameters (measured by deviation rate) during multiple sampling tasks. The core of this method lies in distinguishing between soil types that are "high-risk and require comprehensive monitoring" and "low-risk and can be trusted for authorization" through multi-level risk assessment. This ensures that exploration resources are accurately deployed to problem areas, thereby achieving scientific optimization of the sampling process while ensuring the integrity of the samples.

[0039] This method employs a tiered risk assessment process. First, it identifies sampling tasks with abnormal parameter variations (i.e., parameter variation sampling tasks), then calculates the proportion of anomalies for each soil type. Through multi-level threshold comparisons, soil types are categorized into different risk levels: soil types with severe problems (extremely high proportions) or widespread problems (widespread impact) are classified as high-risk, requiring comprehensive exploration using basic control methods to pinpoint the root cause; for soil types with minor local anomalies but overall controllable conditions, refined management is implemented based on their historical performance—those with a history of anomalies receive focused attention (basic control methods), while stable types without any anomalies are trusted and allowed to use alternative control methods covering only a portion of the pressure range each time. The essence of this logic is "serious scrutiny for those in doubt, simplification for those with confidence," rather than simply pursuing efficiency.

[0040] S11 measures the degree of consistency of soil parameters in different soil types during the sampling and processing process, and the deviation rate of soil parameters in different sampling and processing processes within the same sampling task.

[0041] Soil type: refers to a stratigraphic unit with similar physical and mechanical properties, as classified according to geotechnical engineering classification standards, such as clay, silt, sand, and gravel.

[0042] Sampling task: refers to the complete sampling process carried out in a survey project for a specific point or depth range.

[0043] Sampling and processing process: refers to the entire operation from lowering the sampling equipment, pressure control, sample collection to lifting, among which pressure control is the core variable.

[0044] Soil parameters: quantitative indicators that reflect the characteristics of soil and rock masses, such as water content, density, void ratio, and unconfined compressive strength.

[0045] Consistency: An index that measures the degree of dispersion between soil parameters obtained from different sampling processes (such as using different pressure control methods) in the same sampling task.

[0046] Deviation rate: A numerical value that quantifies the degree of consistency. It is usually calculated as the ratio of the standard deviation to the mean or the ratio of the maximum deviation to the mean, and is used to characterize the fluctuation range of parameters.

[0047] In the same sampling task, it is often necessary to compare the impact of multiple pressure control methods (such as different pressure holding thresholds) on sample quality. By calculating the deviation rate of soil parameters obtained from each treatment process, the consistency and stability of samples under different pressure control methods can be objectively evaluated. The higher the deviation rate, the greater the impact of pressure control on the parameters, and the more likely there may be issues with sample fidelity.

[0048] In a certain engineering survey, for the same clay layer sampling task, three parallel samplings were conducted using three pressure compensation values: 0.1 MPa, 0.2 MPa, and 0.3 MPa. The measured water contents were 32%, 31%, and 33%, respectively, with a calculated deviation rate of 6.25% (assuming the calculation method is (maximum value - minimum value) / mean). This deviation rate will be used for subsequent judgment.

[0049] S12 uses the deviation rate to determine the parameter variation sampling task in the soil type;

[0050] Sampling tasks with parameter variations: These are sampling tasks in which the deviation rate of soil parameters obtained from different sampling processes exceeds the preset allowable range (i.e., they do not meet the consistency requirements). These tasks indicate that the pressure control method has significantly disturbed the sample, and the original state of the sample is questionable.

[0051] The deviation rate is a continuous value, and an engineering-acceptable threshold (e.g., 5%) must be set to determine which tasks are abnormal. Tasks exceeding the threshold indicate that existing pressure control methods cannot guarantee sample integrity and require close attention.

[0052] Assume the preset deviation rate threshold is 5%. In the example above, the deviation rate of the clay layer sampling task is 6.25%, which is greater than 5%. Therefore, this task is marked as a "parameter variation sampling task" for that clay layer. If the deviation rate of another sand layer sampling task is 3%, it will not be marked.

[0053] S13 uses parameter variation sampling task data in different soil types to determine the pressure control method in the sampling process of the soil type.

[0054] Specifically, the parameter variation sampling task is a sampling task in which the deviation rate of soil parameters from the sampling process in the sampling task does not meet the requirements.

[0055] Furthermore, based on sampling task data showing parameter variations in different soil types, a pressure control method is determined during the sampling and processing of the soil type, specifically including:

[0056] S131 uses the parameter variation sampling task data in different soil types to determine the proportion of parameter variation sampling tasks in different soil types, and uses it as the parameter variation proportion to determine whether there is a soil type whose parameter variation proportion is greater than a preset variation proportion threshold. If so, the pressure control method in the sampling process of the soil type is determined to be the basic control method. If not, proceed to step S132.

[0057] Parameter variation percentage: For a specific soil type, the percentage of sampling tasks involving parameter variation out of the total number of sampling tasks for that type. This reflects the sensitivity of that soil type to pressure control.

[0058] Preset variation ratio threshold: A pre-set critical value. When the variation ratio of a parameter of a certain soil type exceeds this value, it is considered that the soil type generally has sampling quality problems and belongs to a high-risk type, requiring the most comprehensive control strategy for thorough diagnosis.

[0059] Basic control method: A pressure control strategy requires sampling and processing within all sampling pressure ranges using exploration sampling and processing equipment during the same sampling task, and comparing the differences in soil parameters between different pressure ranges. This method covers all possible pressure ranges and aims to comprehensively explore the optimal pressure point to completely solve the sampling distortion problem in high-risk strata.

[0060] If a high percentage of tasks for a particular soil type exhibit parameter anomalies, it indicates that the formation conditions for that type are complex or extremely sensitive to pressure, and any simplification may lead to data distortion. Therefore, a fundamental control method must be adopted, which involves sampling across all pressure ranges to obtain complete comparative data, thereby determining the most suitable pressure compensation value for that formation and fundamentally ensuring data reliability.

[0061] Assume there are 20 sampling tasks for the clay type, of which 15 are marked as parameter variation sampling tasks, with a parameter variation ratio of 75%. If the preset variation ratio threshold is 50%, then the proportion of the clay type (75% > 50%) is determined to be the "basic control method" for the pressure control of the clay type.

[0062] S132 uses the parameter variation ratio of different soil types to determine the soil types whose parameter variation ratio is within the preset variation ratio range, and regards them as poorly sampled soil types. It is then determined whether the proportion of the poorly sampled soil types in all soil types is greater than the preset soil type proportion threshold. If so, the overall sampling reliability is poor. Therefore, in order to quickly obtain the pressure control range of the exploration and sampling processing equipment that is suitable for all soil types, the pressure control method in the sampling and processing process of the soil type is determined as the basic control method. If not, proceed to step S133.

[0063] Preset variation range: A numerical interval (e.g., 20%~50%) is used to define soil types whose parameter variation ratios, while not reaching the extreme threshold of S131, are still at a relatively high level. These types are considered "poorly sampled soil types" and belong to the medium risk category.

[0064] Poorly sampled soil types: Soil types whose parameter variation ratio falls within the above range indicate that there are some problems with their sampling quality, but they have not yet reached the level of general anomalies.

[0065] Preset soil type proportion threshold: A percentage threshold used to determine whether the number of "poorly sampled soil types" accounts for an excessively high proportion of all soil types. If the proportion is too high, it indicates that the problem is no longer an isolated phenomenon, but reflects a systemic defect in the overall sampling technology or equipment.

[0066] All soil types: refers to all soil types present in the survey site, regardless of whether there are parameter variation tasks.

[0067] If poorly sampled soil types constitute the majority of soil types, it indicates that the current conventional pressure control method may have failed entirely, and the risk has spread globally. In this case, routine operations must be suspended immediately, and all soil types must be upgraded to a basic control method for comprehensive testing to recalibrate equipment parameters or optimize processes, fundamentally addressing the systemic risk.

[0068] Assume there are four soil types: clay, silt, sand, and silty soil. Calculations show that the parameter variation rate for silt is 30%, and for silty soil, it's 25%, both falling within the preset variation range (20%~50%). Therefore, these two are classified as poorly sampled soil types. At this point, the number of poorly sampled soil types is 2, accounting for 50% of all soil types (4). If the preset soil type proportion threshold is 40%, then 50% > 40%, indicating poor overall reliability and a widespread problem. Therefore, pressure control methods for all four soil types are determined as the basic control methods to systematically investigate equipment or process defects and quickly obtain a pressure control range suitable for the entire field.

[0069] S133 Determine whether the soil type belongs to the poorly sampled soil type. If yes, determine that the pressure control method in the soil type sampling process is the basic control method. If no, proceed to step S134.

[0070] When the overall situation has not yet triggered global basic controls, individual risk assessments are required for each soil type. For soil types that are already poorly sampled (moderate risk), the high proportion of anomalies indicates that this type is inherently sensitive to stress and has systemic problems. Basic control methods are still needed for in-depth diagnosis to ensure that the sampling quality is improved.

[0071] This step is a local reinforcement in the case where S132 has not triggered globally, ensuring that medium-risk formations also receive sufficient attention and are thoroughly investigated.

[0072] Following the previous example, if the global proportion does not exceed the threshold, proceed to this step. For silt (a poorly sampled soil type), determine its pressure control method as the basic control method; while for clay (not a poorly sampled soil type, assuming its parameter variation rate is 10%), proceed to S134 for further judgment.

[0073] S134 determines whether the proportion of the poorly sampled soil type in all soil types with parameter variation sampling tasks is greater than a preset value for the type proportion. If yes, then the pressure control method in the sampling process of the soil type is determined to be another control method. If no, then the pressure control method in the sampling process of the soil type is determined according to whether there is a parameter variation sampling task for the soil type.

[0074] Soil types with parameter variation sampling tasks: These refer to soil types that have at least one sampling task marked as a parameter variation sampling task, i.e., soil types with anomaly records. This is the set of problematic soils.

[0075] Type Proportion Preset: A percentage threshold used to assess the dominance of poorly sampled soil types (medium risk) in the problematic soil set. If this proportion is high, it indicates that the main problems are concentrated in these medium-risk strata, while other soil types with anomaly records (i.e., those with parameter variation sampling tasks but not belonging to the poorly sampled type, such as the clay to be processed in S134) have a lower degree of anomaly and may be due to incidental factors.

[0076] Other control methods: One pressure control strategy requires that, within the same sampling task, sampling and processing equipment be used to sample within a preset number of sampling pressure intervals, and the differences in soil parameters between different sampling pressure intervals be compared. This method is suitable for stable soil types with low anomaly levels that can be effectively sampled under most pressure scenarios, and the validity of the samples can be confirmed without comprehensive exploration.

[0077] Based on whether there are parameter variations in soil type, the sampling task is to determine whether the currently considered soil type has any abnormal records in order to decide whether to give it special attention (basic control method) or to trust it (other control methods).

[0078] This step deals with the most delicate risk scenarios. When poorly sampled soil types (moderate risk) account for a high proportion of problematic soils, it indicates that the main problem is concentrated in a few clearly problematic strata. In this case, for other soil types with anomaly records but less severe (i.e., clay), the anomalies can be considered localized and sporadic, and their overall stability is acceptable. Therefore, relatively simplified control methods can be applied, and a comprehensive exploration is unnecessary.

[0079] Conversely, if the poorly sampled soil type accounts for a small percentage of the problematic soil, it indicates that the source of the problem is relatively dispersed. In this case, more caution is needed: for soil types with abnormal records (such as clay), even if the degree is minor, it should not be easily ignored and basic control methods should still be used for thorough investigation; while for soil types that have never had abnormal records (such as sandy soil), they can be trusted based on their stable historical performance and other control methods can be used.

[0080] This step is crucial for refined risk management. It distinguishes between the "concentration of the problem" and the "severity of the anomaly," enabling "trust authorization" for low-risk strata. That is, after confirming that the anomaly level is low and it is not the main focus of the contradiction, a simplified control strategy is allowed. This is not for the purpose of improving efficiency, but because it has proven to be reliable enough under most stress scenarios, and there is no need to repeat a comprehensive exploration.

[0081] Assume there are three soil types: clay, silt, and sand. Clay and silt are soil types with parameter variations in the sampling task (i.e., there have been anomalies). The parameter variation rate for clay is 15% (not reaching the poor sampling range of 20%~50%, which is considered a slight anomaly), for silt it is 30% (which is considered a poor sampling, and is considered a moderate anomaly), and for sand it is 0% (no anomaly).

[0082] The percentage of poorly sampled soil types (silt only) in soil types (clay and silt) with parameter variation sampling tasks is calculated as: 1 / 2 = 50%.

[0083] If the preset type percentage is 60%, then 50% < 60%, which does not meet the condition of "concentrated problems," indicating that the problem sources are dispersed (both clay and silt are present, but their properties are different). Therefore, the process proceeds to the judgment of "whether there are parameter variations based on soil type sampling task":

[0084] For clay, there is a sampling task involving parameter variations (albeit to a minor degree). To be on the safe side, the pressure control method for clay is determined to be the basic control method.

[0085] Since there is no parameter variation sampling task for sandy soil, and based on its long-term stable performance, it is trusted, and the pressure control method for sandy soil is determined to be another control method.

[0086] Specifically, based on whether there is a parameter variation sampling task for the soil type, a pressure control method is determined during the sampling and processing of the soil type, including:

[0087] If the soil type has a parameter variation sampling task, then the pressure control method in the sampling process of the soil type is determined to be the basic control method; otherwise, if the soil type does not have a parameter variation sampling task, then the pressure control method in the sampling process of the soil type is determined to be another control method.

[0088] Specifically, the basic control method involves using exploration and sampling equipment to perform sampling in all sampling pressure ranges within the same sampling task, and comparing the degree of difference in soil parameters between different sampling pressure ranges.

[0089] It is also understood that the other control methods involve using survey sampling and processing equipment to perform sampling and processing in a preset number of sampling pressure intervals within the same sampling task, and comparing the degree of difference in soil parameters between different sampling pressure intervals.

[0090] Specifically, such as Figure 3 As shown, the method for determining the matching sampling pressure range for the soil type is as follows:

[0091] For a specific soil type, within the framework of its established pressure control methods (basic control methods or other control methods), the most suitable "matching sampling pressure range" is further selected from multiple candidate sampling pressure ranges. The core of this approach is to evaluate the impact of different sampling rates on the sampling results, identifying those pressure ranges that maintain parameter stability even under rate fluctuations, thereby ensuring that subsequent sampling operations can be carried out under both efficient and robust conditions.

[0092] This method uses sampling rate as a perturbation variable to examine the consistency of soil parameters under different rates within each sampling pressure interval. First, the deviation rate is calculated to identify "stable sampling tasks" that can resist rate perturbation within each pressure interval. Then, the proportion of stable sampling tasks within each pressure interval is statistically analyzed. Through multi-level judgment: for cases with sufficient stable intervals, they are directly adopted as matching intervals; for cases with insufficient stable intervals, a fine-tuning process is performed based on the type of pressure control method (basic or other), retaining as many valuable pressure intervals as possible while ensuring reliability.

[0093] S21 uses the variation data of soil parameter sampling results for the soil type at different sampling processing speeds to determine the variation data of soil parameter sampling results for the soil type at different sampling processing speeds within the sampling pressure range.

[0094] Sampling speed: refers to the rate at which the equipment advances or rotates during sampling, usually expressed in meters per minute or millimeters per second. Variations in speed can affect the smoothness of the core entering the inner tube and the response time of pressure control.

[0095] Sampling pressure range: refers to the specific pressure compensation value range set in the pressure control method, such as 0.1MPa~0.2MPa, 0.2MPa~0.3MPa, etc. Each range represents a specific pressure holding condition.

[0096] Variable data: refers to a series of soil parameter measurements and their dispersion data caused by using different sampling processing speeds within the same sampling pressure range and the same sampling task.

[0097] Sampling and processing speed is a variable that is difficult to keep strictly constant in field operations. If a certain pressure range can produce stable soil parameters under different speeds, it indicates that the range is not sensitive to operational details and has good engineering robustness. Conversely, if the parameters fluctuate significantly with speed, the reliability of the pressure range is questionable and it is not suitable as a matching range for routine operations.

[0098] Three sampling tasks were conducted on silty clay (Class B soil) within a pressure range of 0.2 MPa to 0.3 MPa. In each task, samples were taken at three different speeds: 0.5 m / min, 1.0 m / min, and 1.5 m / min, and the natural moisture content was measured. For example, the moisture content of Task B-1 at the three speeds was 31%, 32%, and 31.5%, respectively. The deviation rate was calculated.

[0099] S22 uses the changing data to determine a stable sampling task within the sampling pressure range;

[0100] Stable sampling task: This refers to a sampling task in which, within a specific sampling pressure range, the deviation rate of soil parameters obtained at different sampling processing rates remains within a preset deviation rate range for the same sampling task. The deviation rate range is usually consistent with or more stringent than the threshold used in S11.

[0101] Deviation rate is a core indicator for measuring consistency. Only when parameter fluctuations at all speeds are controlled within an acceptable range can a task be considered "stable" under that pressure range, and its sampling results be reliable and unaffected by speed interference.

[0102] The preset deviation rate threshold is 5%. For Task B-1, within the 0.2MPa~0.3MPa range, the maximum deviation of water content at the three velocities is 1%, with a deviation rate of approximately 3.2%, which is less than 5%. Therefore, Task B-1 is marked as a "stable sampling task" for this pressure range. If another task, B-2, has a deviation rate of 6% in this range, it will not be marked.

[0103] S23 determines the matching sampling pressure range for the soil type based on stable sampling task data within different sampling pressure ranges for the soil type.

[0104] It should be noted that the stable sampling task refers to a sampling task in which the deviation rate of the soil parameter sampling results under different sampling processing speeds within the sampling pressure range is all within a preset deviation rate range.

[0105] Specifically, based on the soil type, stable sampling task data within different sampling pressure ranges are used to determine the matching sampling pressure range for the soil type, including:

[0106] S231 defines the sampling pressure interval where the proportion of stable sampling tasks is above a preset task proportion threshold as the stable sampling interval. It then determines whether the number of stable sampling intervals for the soil type is less than a preset stable interval number threshold. If yes, proceed to step S232; otherwise, simply use the stable sampling interval as the matching sampling pressure interval for the soil type.

[0107] Percentage of stable sampling tasks: For a specific sampling pressure range, the percentage of stable sampling tasks out of the total number of sampling tasks in that range. This reflects the overall stability level of that pressure range.

[0108] Preset task quantity percentage threshold: A pre-set percentage threshold. When the percentage of stable tasks in a certain pressure range exceeds this value, the overall performance of that range is considered stable and can be rated as a "stable sampling range".

[0109] Stable sampling range: The proportion of stable tasks meets the standard and is preliminarily identified as a reliable sampling pressure range.

[0110] A preset threshold for the number of stable intervals is set as an integer to determine whether the soil type has a sufficient number of stable sampling intervals. If there are enough (not less than the threshold), these intervals are directly adopted as the final result; if there are not enough (less than the threshold), subsequent steps are required for more refined screening to discover as many valuable intervals as possible.

[0111] First, use a percentage threshold to filter out intervals with excellent overall performance and directly include them in the matching set. If there are enough such excellent intervals (reaching a preset threshold), it indicates that there are sufficient reliable choices for this soil type, and the screening process can be completed. If the number of excellent intervals is insufficient, it indicates that the problem is more complex, and further analysis is needed to determine whether other intervals have value for retention.

[0112] Assume there are three candidate pressure ranges for silty clay (Type B): P1 (0.1~0.2MPa), P2 (0.2~0.3MPa), and P3 (0.3~0.4MPa). Each range has 10 sampling tasks. Statistically, P1 has 9 stable tasks (90%), P2 has 8 (80%), and P3 has 3 (30%). Setting a preset threshold of 75% for the percentage of stable tasks, P1 and P2 are considered stable sampling ranges. The preset threshold for the number of stable ranges is 2. Type B soil has 2 stable ranges, which equals the threshold; therefore, the screening is complete, and the matching sampling pressure ranges for Type B soil are P1 and P2. If the percentage of stable tasks for P3 is only 30%, it will not be included.

[0113] S232 determines whether the sampling pressure range belongs to a stable sampling range. If yes, it determines that the sampling pressure range belongs to the matching sampling pressure range of the soil type. If no, it proceeds to step S233.

[0114] S233 determines whether the pressure control method in the soil type sampling process belongs to the basic control method. If yes, it determines that the remaining sampling pressure intervals do not belong to the matching sampling pressure intervals of the soil type. If no, it determines that the sampling pressure interval belongs to the matching sampling pressure intervals of the soil type if there are stable sampling tasks in the sampling pressure interval and the number of sampling tasks in the sampling pressure interval is less than the preset sampling task number threshold.

[0115] The basic control method, as previously described, is a rigorous strategy requiring comprehensive sampling across all stress ranges and is suitable for high- or moderate-risk soil types. In this context, it implies that the stability assessment for this soil type should be conducted with the utmost conservatism.

[0116] Preset sampling task quantity threshold: An integer threshold used to determine whether there are a sufficiently small number of reliable sampling tasks within a certain unstable interval, so that they can be "exceptionally" included in the matching set. This is typically suitable for situations with a small amount of data but acceptable performance.

[0117] For soil types that employ basic control methods (typically problem strata), the screening criteria must be extremely stringent. Even if a certain interval has a small number of stable tasks, they are all excluded because the overall proportion is insufficient and the type itself carries a high risk, making it unwise to risk adopting them.

[0118] For soil types using other control methods (typically stable strata), the screening criteria can be appropriately relaxed. If a non-stable region, although its overall proportion is not high, contains clearly defined stable sampling tasks, and the total number of tasks in that region is small (possibly due to insufficient data accumulation), then that region can be included in the matching set based on this limited evidence of stability, thereby increasing operational flexibility.

[0119] Following the previous example, Class B soil entered the screening process in S231 due to insufficient number of stable intervals. P1 and P2 have been included, while P3 is pending judgment.

[0120] Scenario 1: If the pressure control method for Class B soil is the basic control method (meaning it carries a higher risk), then according to S233, P3 is excluded and does not belong to the matching sampling pressure range. The final matching range for Class B soil is P1 and P2.

[0121] Scenario 2: If the pressure control method for Class B soil is another control method (meaning its risk is lower), then check P3: P3 has 10 sampling tasks, 3 of which are stable sampling tasks. Assuming the preset threshold for the number of sampling tasks is 5, 10 > 5, which does not meet the condition of "the number of sampling tasks is less than the threshold", therefore P3 is still excluded.

[0122] If P3 has only 4 sampling tasks, 3 of which are stable tasks, then 4 < 5, which meets the condition. Therefore, P3 is identified as the matching sampling pressure range for soil type B. This means that although the overall stability rate of P3 is not high, it is trusted and included in the matching set because its limited number of tasks have shown stability and the risk of soil type B itself is controllable.

[0123] S2 determines the identification and processing method of the sampling pressure interval as a candidate pressure interval based on the degree of overlap of the matching sampling pressure intervals for different soil types and in combination with the soil type data of the sampling pressure interval belonging to the matching sampling pressure interval.

[0124] Specifically, the method for determining the sampling pressure range as the candidate pressure range is as follows:

[0125] Having already identified matching sampling pressure intervals for each soil type, this method further identifies, from a global perspective, which matching sampling pressure intervals can be selected as general "candidate pressure intervals" for priority use in subsequent explorations. The core of this method lies in assessing the "stability resource endowment" of the soil type served by each pressure interval—that is, whether these soil types already have sufficient and easily accessible stable sampling intervals in other intervals. For intervals serving soil types with "scarce stable resources," lenient inclusion criteria are applied; for intervals serving soil types with "abundant stable resources," strict inclusion criteria are used.

[0126] This method first calculates the pressure overlap coefficient between different soil types to measure their similarity in matching intervals. Then, it uses a multi-level judgment process: first, it checks if the overall overlap is too low; if so, a lenient pre-defined treatment method is directly applied. If the overlap is high, it further examines the number of overlapping intervals, the quality of the service objects served by the intervals, and the situation of deviating soil types. The core of S332 is to assess how many of the soil types matched by the interval are "stable soil types" that already have sufficient stable intervals. If the proportion of stable soil types is high, it indicates that the interval serves "abundant" objects, and stricter treatment methods can be applied. If the proportion of stable soil types is low, it indicates that the interval serves "infertile" objects, and S333 is needed to further examine the dependence of these infertile objects on the interval to determine whether a lenient pre-defined treatment method should be applied.

[0127] S31 determines the number of overlaps between matching sampling pressure intervals of different soil types based on the degree of overlap between these intervals, and uses the number of overlaps to determine the pressure overlap coefficient between the soil type and other soil types.

[0128] Matched sampling pressure range: refers to the set of pressure ranges suitable for sampling of each soil type, determined through the aforementioned step S23.

[0129] Number of overlaps: The number of intervals contained in the intersection of the sets of matching sampling pressure intervals for any two soil types.

[0130] Pressure coincidence coefficient: An indicator that quantifies the similarity between two soil types in terms of pressure range selection, determined by the product of the number of coincidences and a preset proportional coefficient. The preset proportional coefficient is a factor used to amplify or reduce the weight of the number of coincidences.

[0131] Different soil types may have different matching ranges, but some ranges may be applicable to multiple soil types. By calculating the number of overlaps and converting it into a pressure overlap coefficient, the commonalities in pressure demand between two soil types can be quantitatively assessed. The higher the coefficient, the stronger their dependence on the same pressure range, which facilitates unified scheduling.

[0132] Suppose there are three soil types, A, B, and C. The matching interval for A is {Ⅰ,Ⅱ}, for B it is {Ⅰ,Ⅱ}, and for C it is {Ⅱ,Ⅲ}. Then the overlap between A and B is 2, the overlap between A and C is 1, and the overlap between B and C is 1. If the preset proportionality coefficient is 0.5, then the pressure overlap coefficient between A and B is 2 × 0.5 = 1.0, between A and C it is 0.5, and between B and C it is 0.5.

[0133] S32 defines the soil type that belongs to the matching sampling pressure range as the matching soil type of the sampling pressure range;

[0134] Matching soil types: For a specific sampling pressure range, all soil types that include that range in their matching sampling pressure range constitute the set of matching soil types for that range.

[0135] Each stress zone may be favored by multiple soil types. Identifying the matching soil type for each zone is fundamental to subsequent assessments of its importance and service targets.

[0136] The matching soil types for interval I are A and B; the matching soil types for interval II are A, B, and C; and the matching soil type for interval III is C.

[0137] S33 utilizes the pressure overlap coefficient between the soil type and other soil types, and combines it with the matching soil type data of the sampling pressure interval, to determine the matching sampling pressure interval as a candidate pressure interval identification processing method.

[0138] Specifically, the pressure overlap coefficient between the soil type and other soil types is determined by multiplying the number of overlapping sampling pressure intervals between the soil type and other soil types with a preset proportional coefficient.

[0139] It is understood that, based on the pressure overlap coefficient between the soil type and other soil types, the average pressure overlap coefficient between different soil types is determined. If the average pressure overlap coefficient between different soil types is less than the preset overlap coefficient threshold, then the identification and processing method of determining all matching sampling pressure intervals as candidate pressure intervals is the preset processing method.

[0140] The average pressure coincidence coefficient is the sum of the pressure coincidence coefficients between all different soil types divided by the logarithm, reflecting the overall similarity of soil types in the selection of pressure ranges throughout the site.

[0141] Preset overlap coefficient threshold: A pre-set critical value used to determine whether the overall similarity is too low.

[0142] Pre-defined processing method: A method for identifying candidate pressure intervals, the judgment criterion being: if the number of soil types whose sampling results meet the requirements for a matched sampling pressure interval exceeds the target number, then the matched sampling pressure interval is determined to belong to the candidate pressure interval. The target number is a relatively low threshold.

[0143] If the overall overlap is very low, it indicates that the stress requirements of different soil types vary greatly, making it difficult to find a universally applicable range. In this case, the threshold should be lowered, and a more lenient pre-defined treatment method should be adopted to retain as many ranges as possible to meet the individual needs of different soil types.

[0144] Calculate the average pressure overlap coefficient of AB, AC, and BC. If the preset overlap coefficient threshold is 0.8 and the average value is 0.67 < 0.8, then all matching intervals (Ⅰ, Ⅱ, Ⅲ) will be identified using the preset processing method. If the preset overlap coefficient threshold is 0.6, then proceed to the next step.

[0145] Additionally, it is understandable that if the average pressure coincidence coefficient between different soil types is not less than a preset coincidence coefficient threshold, the following content is also included:

[0146] S331 will take the sampling pressure intervals that all belong to the matching sampling pressure intervals in different soil types as the overlapping intervals, and determine whether the number of overlapping intervals is less than the preset overlapping interval number threshold. If so, the identification and processing method of all matching sampling pressure intervals as candidate pressure intervals will be the preset processing method. If not, proceed to step S332.

[0147] Overlapping intervals: Pressure intervals that are listed as matching sampling pressure intervals in all soil types, i.e., globally universal intervals.

[0148] Preset threshold for the number of overlapping intervals: An integer threshold used to determine whether the number of general intervals is sufficient.

[0149] When the overall similarity is high, further examine whether there are intervals applicable to all soil types. If such universal intervals are few or even non-existent, it indicates that although pairs are similar, there is a lack of global consensus. In this case, it is still advisable to adopt a lenient pre-defined processing method to retain more options.

[0150] Assuming the matching intervals of A, B, and C are {Ⅰ,Ⅱ}, {Ⅰ,Ⅱ}, and {Ⅱ,Ⅲ} respectively, then the overlapping interval is {Ⅱ} (only Ⅱ is shared by all three), and the number is 1. If the preset threshold for the number of overlapping intervals is 2, then 1 < 2, so all matching intervals (Ⅰ, Ⅱ, Ⅲ) are processed using the preset method. If the threshold is 1, then proceed to the next step.

[0151] S332 Based on the number of matching soil types in the sampling pressure interval, determine the proportion of the number of matching soil types in the sampling pressure interval among all soil types, and use it as the correlation coefficient of the sampling pressure interval. Determine whether the correlation coefficient of the sampling pressure interval is greater than the preset correlation coefficient threshold. If yes, the matching sampling pressure interval is identified as a candidate pressure interval using the preset processing method. If no, proceed to step S333.

[0152] Correlation coefficient: For a given sampling pressure interval, the proportion of matching soil types out of the total number of soil types. It reflects the coverage of that interval.

[0153] Preset correlation coefficient threshold: A percentage threshold used to determine whether the proportion of soil types matched in the interval is high among all soil types. If the correlation coefficient is greater than the threshold, it means that there are many soil types matched in the interval, so the interval can be processed using a lenient preset method; otherwise, if the correlation coefficient is not greater than the threshold, further evaluation is required in S333.

[0154] Assuming that the correlation coefficient of interval II is 1 based on the preliminary judgment, the interval is determined to be processed using a lenient preset method.

[0155] Based on the matching soil types of the matching sampling pressure intervals, S333 determines the matching soil types in which the number of matching sampling pressure intervals with the preset processing method is less than a preset interval number threshold, and identifies these as deviation soil types. If the number of deviation soil types in the matching sampling pressure intervals is above a preset type number threshold, the matching sampling pressure interval is identified as the preset processing method as a candidate pressure interval. If the number of deviation soil types in the matching sampling pressure intervals is not above the preset type number threshold, the matching sampling pressure interval is identified as another processing method as a candidate pressure interval.

[0156] Specifically, the preset processing method determines that the matching sampling pressure interval belongs to the candidate pressure interval when the number of soil types that meet the requirements of the sampling results of the matching sampling pressure interval is greater than or equal to the target number (e.g., not less than 1). Other processing methods determine that the matching sampling pressure interval belongs to the candidate pressure interval when the number of soil types that meet the requirements of the sampling results of the matching sampling pressure interval is greater than or equal to the preset target number, wherein the target number is less than the preset target number.

[0157] Deviation Soil Type: For a given soil type, if the number of matching sampling pressure intervals that have been determined to use the preset processing method is less than the preset interval number threshold, it indicates that the available "relaxed selection intervals" for this soil type are insufficient, resulting in a stable sampling resource gap, and thus it becomes a "deviation" type. These soil types are precisely the group with the highest dependence on the current interval.

[0158] Preset type quantity threshold: An integer threshold used to determine whether the number of deviation soil types reaches a level requiring special consideration for the current interval. If the number of deviation soil types is large enough, it indicates that the current interval is of significant value in filling resource gaps for multiple soil types, and a lenient preset treatment method should be adopted to ensure its inclusion.

[0159] Other processing methods: Another method for identifying candidate pressure intervals uses the following criteria: if the number of soil types whose sampling results for a matched pressure interval meet the requirements is greater than or equal to a preset target number (not less than 2), then the matched sampling pressure interval is determined to be a candidate pressure interval. The preset target number is a relatively high threshold.

[0160] For the intervals entering S333, the soil types they serve are mostly stable, resource-poor "infertile" types. This step further assesses how many of these infertile types are "deviant soil types" that are strongly dependent on the current interval—that is, they have few leniently selected intervals available elsewhere, making this interval crucial for them. If there are enough such deviant soil types, it indicates that the interval has significant "timely assistance" value and should be treated with lenient pre-set methods. If there are few deviant soil types, it indicates that although these soil types are generally infertile, the current interval is not their sole or primary dependence, and other stricter treatment methods can be used.

[0161] Continuing with the previous example, the matching soil types in interval I are B and C, both of which have entered S333. It is necessary to determine whether B and C are biased soil types.

[0162] For soil type B, there are two matching intervals: I and II. Interval II has already undergone a preset processing method and has a quantity of 1. The preset interval quantity threshold is 2, and since 1 < 2, B is a biased soil type.

[0163] For soil C, I and II are matched in the same way. II has been treated using a preset method and its quantity is 1 < 2. C is also a deviated soil type.

[0164] The number of soil types with deviation in interval I is 2. If the preset threshold for the number of types is 1, then 2 ≥ 1, therefore interval I adopts a lenient preset processing method. If the preset threshold for the number of types is 3, then 2 < 3, therefore interval I adopts a stricter other processing method.

[0165] It is understood that determining whether the sampling results of the matched sampling pressure range meet the requirements specifically includes:

[0166] If, in the sampling task, the deviation rate between the matched sampling pressure interval and other sampling pressure intervals in different soil parameters all meet the requirements (all less than 5%), then the other sampling pressure intervals are determined as the result association intervals.

[0167] Sampling tasks with a number of associated intervals greater than or equal to a preset threshold (3) are considered reliable sampling tasks for the matching sampling pressure interval. If the number of reliable sampling tasks for the matching sampling pressure interval in the soil type is greater than a preset threshold (e.g., greater than 10), then the soil type is determined to be a soil type for which the sampling results of the matching sampling pressure interval meet the requirements.

[0168] S3 utilizes the candidate pressure range and the sampling analysis data of the candidate pressure range, and combines the degree of overlap between the matching sampling pressure range of the soil type and the candidate pressure range to determine the sampling processing method for the soil type in different candidate pressure ranges.

[0169] Specifically, the method for determining the sampling and processing methods for the soil type in different candidate pressure ranges is as follows:

[0170] In the preliminary steps, this invention has determined the matching sampling pressure intervals for each soil type through multi-level decision-making and identified candidate pressure intervals. However, the number of candidate pressure intervals may be large, and the applicability of the same pressure interval varies among different soil types. Comprehensive testing of all candidate intervals on all soil types would be time-consuming and costly; insufficient testing might miss intervals with universal value. Therefore, a scientific method is needed to dynamically determine which candidate intervals each soil type should be sampled and verified on, based on the number of candidate intervals and existing adaptation data for each interval, ultimately selecting the effective pressure intervals that best suit the most soil types, thus achieving efficient resource allocation.

[0171] S41 uses the candidate pressure range data to determine the number of candidate pressure ranges;

[0172] Alternative pressure zones: refers to the set of pressure zones identified through the aforementioned steps (S31~S33) that are to be preferentially recommended for use in subsequent exploration.

[0173] The number of candidate intervals determines the complexity of subsequent decision-making. When the number is small, a comprehensive testing strategy can be used to ensure data integrity; when the number is large, differential screening needs to be introduced to avoid unnecessary testing.

[0174] This step provides the basis for judgment on the first-level branch of the decision tree, demonstrating the adaptability of the method.

[0175] S42 determines the matching sampling pressure interval for sampling and analysis, which is selected as the candidate pressure interval, based on the degree of overlap between the matching sampling pressure interval and the candidate pressure interval for the soil type, and uses it as the analysis pressure interval.

[0176] Matched sampling pressure range: refers to the set of pressure ranges suitable for sampling of a specific soil type, determined by step S23.

[0177] Analysis of pressure ranges: For a certain soil type, those ranges that are also candidate pressure ranges in the matching sampling pressure range are the ranges that need to be focused on and may be sampled and verified for that soil type.

[0178] Each soil type only needs to focus on the intervals that are both suitable for it and have potential universal value, without blindly testing all alternative intervals. This step combines the personalized needs of each soil type with the global set of alternatives, focusing on key intervals.

[0179] This achieves a mapping from global candidates to individual concerns, defining the scope for subsequent targeted testing.

[0180] S43 Based on the number of candidate pressure intervals and the sampling analysis and processing data of the candidate pressure intervals, the soil type analysis pressure interval and the soil type data of the candidate pressure intervals belonging to the matching sampling pressure intervals are determined, and the sampling processing method of the soil type in the candidate pressure interval is determined.

[0181] Furthermore, if the number of candidate pressure intervals is less than a pre-set threshold for the number of candidate pressure intervals, then in order to determine in which soil types the candidate pressure intervals are suitable, the candidate pressure intervals are sampled in all soil types to determine in which soil types the candidate pressure intervals are suitable.

[0182] At this point, there are few candidate intervals, and no suitable candidate interval has yet been determined. Therefore, comprehensive testing is conducted. Thus, to determine which soil types each candidate pressure interval is suitable for, samples of each candidate pressure interval are processed across all soil types to obtain the suitability of each interval across all soil types.

[0183] Furthermore, if the number of candidate pressure ranges is not less than a pre-set threshold for the number of candidate pressure ranges, then the following is included:

[0184] S431 uses the sampling analysis data of the candidate pressure range to determine the suitable soil type of the candidate pressure range, and determines whether there is a candidate pressure range in which the proportion of the suitable soil type in all soil types is greater than a preset suitable proportion threshold. If yes, proceed to step S432. If no, the candidate pressure range is sampled and processed in all soil types to determine in which soil type the candidate pressure range is suitable.

[0185] Suitable soil type: refers to the soil type whose sampling results within a certain alternative pressure range meet the requirements in the existing historical sampling data (for the definition of meeting the requirements, please refer to the determination of "sampling results meet the requirements" in the previous steps, which means that the number of reliable sampling tasks exceeds the threshold).

[0186] Preset adaptation percentage threshold: A pre-set percentage used to determine whether a candidate range has shown high universality.

[0187] If no candidate interval has a high fitting rate, it means that the known applicability of each interval is very limited. Blindly selecting may miss important information. Therefore, it is necessary to conduct comprehensive testing to understand the true performance of all intervals.

[0188] This step filters out intervals that already have a certain general basis for focused processing, avoiding wasting time on intervals that are completely unsolvable.

[0189] It is understood that the suitable soil type is the soil type whose sampling results within the alternative pressure range meet the requirements.

[0190] S432 uses soil type data of the candidate pressure interval belonging to the matching sampling pressure interval to determine the soil type of the candidate pressure interval belonging to the matching sampling pressure interval, and determines whether the number of soil types of the candidate pressure interval belonging to the matching sampling pressure interval is greater than the threshold of the number of matching types. If so, the candidate pressure interval is sampled in all soil types to determine in which soil type the candidate pressure interval is suitable. If not, proceed to step S433.

[0191] Matching type quantity threshold: An integer threshold used to determine how many soil types are listed as matching intervals (i.e., theoretically suitable intervals) for a given candidate interval.

[0192] If a range already has a high compatibility rate, and is also listed as a matching range by a large number of soil types, it indicates that the range has high theoretical value and is worth conducting comprehensive testing to confirm its true universality. Conversely, if the compatibility rate is high but the number of matching ranges is small, the universality of the range may be limited to a few soil types, and comprehensive testing is not necessary; a more refined and targeted judgment can be made.

[0193] This step further differentiates the different situations within the "high fit" range, avoiding the allocation of excessive testing resources to ranges that may only be applicable to a few soil types.

[0194] S433 The candidate pressure range with the proportion of the suitable soil type in all soil types greater than the preset suitable proportion threshold is taken as the potential usable pressure range. It is determined whether there is a potential usable pressure range in the analysis pressure range of the soil type. If yes, proceed to step S434. If no, the candidate pressure range is sampled in the soil type to determine whether the candidate pressure range is suitable in the soil type.

[0195] Potentially available pressure range: refers to those high-value ranges where the adaptation rate exceeds the threshold, but have not yet been determined to require full testing.

[0196] For a specific soil type, if its analytical pressure range includes a potentially usable range, it means that the soil type already has a wide range of analytical pressure ranges covering other soil types. If its analytical pressure range does not contain any potentially usable ranges, it means that the soil type does not have a wide range of analytical pressure ranges covering other soil types. In this case, it is necessary to directly test these ranges to determine if there is a suitable pressure value for the soil type.

[0197] S434 determines whether the candidate pressure range belongs to the matching sampling pressure range of the soil type. If so, the candidate pressure range is sampled in the soil type to determine whether the candidate pressure range is suitable for the soil type. If not, the candidate pressure range is not sampled in the soil type for the time being. Sampling is performed in the soil type where the candidate pressure range belongs to the matching sampling pressure range and the soil type with the most potential available pressure ranges whose current sampling results meet the requirements. When the sampling results in any soil type whose sampling results do not meet the requirements meet the requirements, sampling is performed in that soil type.

[0198] The logic here is somewhat complex, but the core principle is to prioritize testing soil types that might improve the general applicability of the interval. Specifically, for a potentially usable interval that doesn't belong to the current soil type's matching interval, instead of immediately testing it on the current soil type, we identify those soil types that currently don't meet the requirements among those matching the interval, and select the one that will increase the number of compatible soil types for the interval the most. Once this test is successful (i.e., the soil type becomes compatible), we then return to testing the current soil type, because by then the interval's general applicability has improved, and the testing value of the current soil type has also increased.

[0199] This strategy aims to maximize the universality of intervals with a minimal number of tests. By prioritizing testing of key types that may make the intervals adaptable to more diverse environments, the value of the intervals can be quickly enhanced, making them more persuasive when other types are tested subsequently.

[0200] Finally, after all tests were completed, the pressure range with the largest number of adaptable soil types was selected as the effective universal pressure range, ensuring its applicability across multiple soil types. The entire method controls the overall test scale by using a threshold for the number of candidate ranges; comprehensive testing is conducted when the number of ranges is small, while differentiated analysis is performed when the number of ranges is large, achieving an optimal balance between testing costs and information acquisition.

[0201] If there are four soil types: silty clay (Type A), silty clay (Type B), fine sand (Type C), and gravel (Type D), the matching sampling pressure ranges and alternative pressure ranges for each soil type have been determined through preliminary steps (S1~S3) as follows:

[0202] Matching intervals: Class A: II and III; Class B: I and II; Class C: I and III; Class D: III and IV.

[0203] Alternative pressure ranges: As identified by S33, there are four ranges: I, II, III, and IV. The number of alternative ranges is 4.

[0204] The threshold for the number of pre-selected pressure ranges is set to 3. The actual number is 4 ≥ 3, so we proceed to scenario two (differentiation analysis).

[0205] Step S41: Number of alternative pressure ranges = 4.

[0206] Step S42: Determine the analytical pressure range for each soil type (i.e., the portion of the matched range that belongs to the candidate range and has already been analyzed):

[0207] Category A: Matching intervals II and III are both alternatives; the analysis of pressure interval II is preferred.

[0208] Category B: Matching intervals I and II are both alternatives, therefore the pressure interval to be analyzed is II.

[0209] Category C: Matching intervals I and III are both alternatives, therefore the pressure interval to be analyzed is III.

[0210] Category D: Matching intervals III and IV are both alternatives, therefore the pressure interval to be analyzed is III.

[0211] Step S43: Make differentiated decisions.

[0212] Preliminary data preparation: Based on historical sampling data, the currently suitable soil types (i.e., soil types that meet the sampling requirements) for each candidate pressure range are statistically analyzed. A preset suitability percentage threshold of 60% and a matching type quantity threshold of 2 are set. Existing suitability data is as follows:

[0213] Interval II: Suitable soil types are A, B, and C (3 types), accounting for 75% > 60%, a high percentage.

[0214] Interval III: Suitable soil types are B, C, and D (3 types), accounting for 75% > 60%, a high percentage.

[0215] Step S431: There are alternative pressure ranges (II and III) with an adaptation ratio greater than 60%, so proceed to S432.

[0216] Step S432: For interval I of the analysis strategy to be determined, the soil types that belong to the matching sampling pressure interval (i.e., which soil types have matching intervals that include I) are C and B, with a quantity of 2, which is not greater than the matching type quantity threshold of 2 (equal to), so proceed to S433.

[0217] Step S433: Designate high-proportion zones II and III as potential available pressure zones. Now, make judgments for each soil type separately.

[0218] Taking soil type A as an example:

[0219] The analysis pressure range for A is II and III, where both II and III are potentially usable ranges. Therefore, there is a potentially usable range, so proceed to S434.

[0220] Step S434: For each soil type, determine whether the potential available interval in its analysis pressure interval belongs to the matching interval of that soil type.

[0221] Soil type A:

[0222] I does not belong to the matching interval of A, so I will not be tested on A for the time being.

[0223] Example 2

[0224] In a second aspect, the present invention provides an apparatus comprising: a memory and a processor connected in communication, and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the aforementioned method for rock and soil geological exploration and analysis when running the computer program.

[0225] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the embodiments of apparatus, devices, and non-volatile computer storage media are basically similar to the method embodiments, so the descriptions are relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0226] The foregoing has described specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired result. In some embodiments, multitasking and parallel processing are possible or may be advantageous.

[0227] The above description is merely one or more embodiments of this specification and is not intended to limit this specification. Various modifications and variations can be made to the one or more embodiments of this specification by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of one or more embodiments of this specification should be included within the scope of the claims of this specification.

Claims

1. A method of geotechnical investigation analysis, characterized by, Specifically, it includes: Based on the geological survey data, the consistency of soil parameters during the sampling and processing of the soil is determined. The consistency is used to determine the pressure control method for the sampling and processing of different soil types. The pressure control method for different soil types is used to determine the variation data of soil parameter sampling results for the soil type under different sampling and processing speeds, and the matching sampling pressure range for the soil type is determined. Based on the degree of overlap of matching sampling pressure intervals for different soil types, and combined with soil type data belonging to the matching sampling pressure interval, a method for identifying and processing the sampling pressure interval as a candidate pressure interval is determined. Using the candidate pressure range and the sampling analysis data of the candidate pressure range, and combining the degree of overlap between the matching sampling pressure range and the candidate pressure range for the soil type, the sampling processing method for the soil type in different candidate pressure ranges is determined. The method for determining the pressure control method during the sampling and treatment process of the aforementioned soil type is as follows: By assessing the consistency of soil parameters across different soil types during the sampling and processing process, the deviation rate of soil parameters in different sampling and processing processes within the same sampling task can be determined. The deviation rate is used to determine the parameter variation sampling task in the soil type; Using parameter variation sampling task data in different soil types, determine the pressure control method in the sampling and processing process of the soil type; The method for determining the sampling pressure range as the candidate pressure range is as follows: The degree of overlap between matching sampling pressure intervals for different soil types is used to determine the number of overlaps between matching sampling pressure intervals for different soil types, and the number of overlaps is used to determine the pressure overlap coefficient between the soil type and other soil types. Soil types belonging to the sampling pressure range are defined as the matching soil types for the sampling pressure range. A method for identifying and processing the matching sampling pressure interval as a candidate pressure interval by utilizing the pressure overlap coefficient between the soil type and other soil types, and combining it with the matching soil type data of the sampling pressure interval.

2. The method of geotechnical analysis according to claim 1, wherein, The geological survey data includes sampling and processing procedures for different soil types and soil parameters obtained during these procedures.

3. The method of geotechnical analysis according to claim 1, wherein, The consistency of soil parameters during the sampling and processing of the soil type is determined based on the deviation rate of soil parameters between sampling and processing stages.

4. The geotechnical investigation analysis method of claim 1, wherein, The method for determining the parameter variation sampling task is as follows: The sampling process in which the deviation rate of soil parameters from the sampling process in the sampling task does not meet the requirements is identified, and the sampling task in which the deviation rate does not meet the requirements is identified as the parameter variation sampling task.

5. The geotechnical analysis method of claim 1, wherein, Based on sampling task data of parameter variations in different soil types, a pressure control method is determined during the sampling and processing of the soil types, specifically including: Using parameter variation sampling task data in different soil types, the proportion of parameter variation sampling tasks in different soil types is determined and used as the parameter variation ratio. When it is determined that there is a soil type whose parameter variation ratio is greater than a preset variation ratio threshold, the pressure control method in the sampling process of that soil type is determined as the basic control method.

6. The geotechnical investigation analysis method of claim 1, wherein, The pressure overlap coefficient between the soil type and other soil types is determined by multiplying the number of overlaps in the matching sampling pressure intervals between the soil type and other soil types by a preset proportional coefficient.

7. The rock and soil geological exploration and analysis method as described in claim 1, characterized in that, Based on the pressure overlap coefficient between the soil type and other soil types, the average pressure overlap coefficient between different soil types is determined. If the average pressure overlap coefficient between different soil types is less than the preset overlap coefficient threshold, then all matching sampling pressure intervals are identified as candidate pressure intervals. This identification and processing method is the preset processing method.

8. An apparatus comprising: A memory and processor connected by communication, and a computer program stored in the memory and capable of running on the processor, characterized in that, when the processor runs the computer program, it executes a rock and soil geological exploration and analysis method according to any one of claims 1-7.

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