A method and system for evaluating the collapsibility sensitivity of loess foundation

Abstract

The invention discloses a method and system for evaluating the collapsibility sensitivity of a loess foundation, and relates to the technical field of collapsibility evaluation of loess. The method for evaluating the collapsibility sensitivity of a loess foundation obtains and pre-processes the current water state parameter set, the current soil environmental chemical parameter set, the current soil structure parameter set, and the current soil mechanical parameter set of the loess foundation and performs comprehensive analysis to obtain the current comprehensive collapsibility sensitivity index of the loess foundation; the current comprehensive collapsibility sensitivity index of the loess foundation is compared and analyzed with a preset collapsibility sensitivity threshold set, and the loess foundation is classified into collapsibility sensitivity levels according to the comparison and analysis results. The invention collects and analyzes data from multiple dimensions, thereby being able to comprehensively evaluate the stability of the loess foundation. Compared with traditional methods, this multi-parameter comprehensive analysis method can more accurately identify foundations of different risk levels and reduce potential risks caused by evaluation errors.

Description

Technical Field

[0001] The invention relates to the technical field of collapsibility evaluation of loess, and in particular to a method and system for evaluating the collapsibility sensitivity of a loess foundation. Background Art

[0002] The collapsibility sensitivity of loess foundation is one of the important indicators for assessing the risks of engineering construction. Loess, due to its unique geological composition and structure, exhibits significant collapsibility, especially when the moisture content changes, which directly affects the safety and stability of buildings and other structures. The collapsibility problem is particularly serious in areas where loess is widely distributed, such as the Loess Plateau. Therefore, accurately assessing the collapsibility sensitivity of loess foundation is crucial to ensure engineering safety and optimize design.

[0003] Traditional methods for evaluating collapsibility mainly rely on laboratory tests of soil samples, including collapsibility coefficient tests, soil moisture content determination, and soil physical and chemical property analysis. Although these methods can provide basic soil collapsibility data, they are often time-consuming and cannot reflect the collapsibility status of a large range of foundations in real time. In addition, traditional methods usually require a lot of manual operations and expertise, which to some extent limits their application in rapid land assessment and large-scale land development.

[0004] Prior art, such as the invention patent application with announcement number: CN115754236A, discloses a method for evaluating the collapsibility sensitivity of loess foundation, which includes the following steps: Step 1: sampling loess in the target loess to be evaluated and dividing it; Step 2: determining the relevant parameters of each numbered loess sample, which parameters include the collapsibility starting pressure P, the initial water content W1, and the saturated water content W2; Step 3: calculating the collapsibility sensitivity M of each numbered loess according to the formula M=(W2-W1) / P, and averaging the collapsibility sensitivity M of all numbered loess; Step 4: determining the collapsibility sensitivity of loess according to the collapsibility sensitivity M of loess, and taking corresponding disposal measures. By dividing and refining the loess foundation, its collapsibility sensitivity can be more accurately obtained, and correct disposal measures can be taken.

[0005] Based on the above scheme, it is found that the limitations of the existing technology include at least the following problems. First, in the existing technology, the evaluation of loess is often based on a single or limited sample, which makes it difficult to fully reflect the soil conditions at different depths and locations in the construction area. The measurement error of a single sample may be large. Therefore, in practical applications, this method is likely to lead to inaccurate assessment of the sensitivity of loess foundation to wetting, which in turn affects the safety of the building and the effective use of the land. Secondly, because the existing evaluation methods often ignore the complexity and diversity of the foundation, the evaluation results are not matched with the actual construction needs in terms of practicality and economic benefits. This mismatch is likely to lead to higher construction costs and longer construction periods, thereby greatly inhibiting the economic benefits and progress of the project. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a method and system for evaluating the collapsibility sensitivity of loess foundations, which solves the problem that in the prior art, the evaluation of loess is often based on a single or limited sample, which makes it difficult to fully reflect the soil conditions at different depths and locations in the construction area. The measurement error of a single sample may be large. Therefore, in practical applications, this method is likely to lead to inaccurate assessment of the collapsibility sensitivity of loess foundations, thereby affecting the safety of buildings and the effective use of land. Secondly, since the existing evaluation methods often ignore the complexity and diversity of the foundation, the evaluation results are not matched with the actual construction needs in terms of practicality and economic benefits. This mismatch is likely to lead to higher construction costs and longer construction periods, thereby greatly inhibiting the economic benefits and progress of the project.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a method for evaluating the collapsibility sensitivity of a loess foundation, comprising the following steps: obtaining and preprocessing a current water state parameter set, a current soil environmental chemical parameter set, a current soil structural parameter set, and a current soil mechanical parameter set of the loess foundation; performing comprehensive analysis on the current water state parameter set, the current soil environmental chemical parameter set, the current soil structural parameter set, and the current soil mechanical parameter set of the preprocessed loess foundation to obtain a current water state sensitivity index, a current soil environmental chemical stability index, a current soil structural stability index, and a current soil mechanical stability index of the loess foundation; performing comprehensive analysis on the current water state sensitivity index, the current soil environmental chemical stability index, the current soil structural stability index, and the current soil mechanical stability index of the loess foundation to obtain a current comprehensive collapsibility sensitivity index of the loess foundation; performing comparative analysis on the current comprehensive collapsibility sensitivity index of the loess foundation with a preset collapsibility sensitivity threshold set, and classifying the loess foundation into collapsibility sensitivity levels according to the comparative analysis results.

[0008] Furthermore, the current water state parameter set specifically includes the current soil moisture content value and the current groundwater level value; the current soil environmental chemical parameter set specifically includes the current soil organic matter content value, the current soil electrical conductivity value and the current soil pH value; the current soil structure parameter set specifically includes the current soil temperature value, the current soil dry density value and the current soil porosity ratio value; and the current soil mechanical parameter set specifically includes the current soil shear strength value and the current soil permeability coefficient value.

[0009] Furthermore, the specific formula for calculating the current comprehensive collapsibility sensitivity index of loess foundation is as follows: Among them, SxM is the current comprehensive collapsibility sensitivity index of loess foundation, SwM is the current water sensitivity index of loess foundation, α1 is the water sensitivity coefficient stored in the database, HxW is the current soil environmental chemical stability index of loess foundation, α2 is the soil environmental chemical coefficient stored in the database, WdW is the current soil structure stability index of loess foundation, α3 is the soil structure coefficient stored in the database, LxW is the current soil mechanical stability index of loess foundation, α4 ​​is the soil mechanical coefficient stored in the database, α1+α2+α3+α4=1, and e is a natural constant.

[0010] Furthermore, the specific steps for obtaining the current water sensitivity index of the loess foundation are as follows: obtain the current soil moisture reference value and the current groundwater level reference value of the loess foundation; conduct a comprehensive analysis on the current soil moisture reference value and the current groundwater level reference value of the loess foundation in combination with the current soil moisture value and the current groundwater level value, respectively, to obtain the current water sensitivity index of the loess foundation.

[0011] Furthermore, the specific formula for calculating the current water sensitivity index of loess foundation is as follows: Among them, SwM is the current water sensitivity index of loess foundation, ThS is the current soil moisture content of loess foundation, TsC is the current soil moisture reference value of loess foundation, DxS is the current groundwater level value of loess foundation, and DsC is the current groundwater level reference value of loess foundation.

[0012] Furthermore, the specific steps for obtaining the current soil environmental chemical stability index of the loess foundation are as follows: obtaining the current soil organic matter content reference value, the current soil conductivity reference value, and the current soil pH reference value of the loess foundation; comprehensively analyzing the current soil organic matter content reference value, the current soil conductivity reference value, and the current soil pH reference value of the loess foundation in combination with the current soil organic matter content value, the current soil conductivity value, and the current soil pH value, respectively, to obtain the current soil environmental chemical stability index of the loess foundation, and the calculation formula is as follows: Among them, HxW is the current soil environmental chemical stability index of loess foundation, YjH is the current soil organic matter content value of loess foundation, YjC is the current soil organic matter content reference value of loess foundation, DdL is the current soil conductivity value of loess foundation, DdC is the current soil conductivity reference value of loess foundation, PH is the current soil PH value of loess foundation, and PHC is the current soil PH reference value of loess foundation.

[0013] Furthermore, the specific steps for obtaining the current soil structure stability index of the loess foundation are as follows: obtaining the current soil temperature reference value, the allowable soil temperature change value, the current soil dry density reference value, and the current soil porosity reference value of the loess foundation; comprehensively analyzing the current soil temperature reference value, the allowable soil temperature change value, the current soil dry density reference value, and the current soil porosity reference value of the loess foundation in combination with the current soil temperature value, the current soil dry density value, and the current soil porosity value, respectively, to obtain the current soil structure stability index of the loess foundation, and the specific formula is as follows: Among them, WdW is the current soil structure stability index of loess foundation, TwD is the current soil temperature value of loess foundation, TwC is the current soil temperature reference value of loess foundation, TwY is the allowable change value of soil temperature of loess foundation, GmD is the current soil dry density value of loess foundation, GmC is the current soil dry density reference value of loess foundation, KxB is the current soil porosity ratio value of loess foundation, and KxC is the current soil porosity ratio reference value of loess foundation.

[0014] Furthermore, the specific steps for obtaining the current soil mechanical stability index of the loess foundation are as follows: obtaining the current soil shear strength reference value and the current soil permeability coefficient reference value of the loess foundation; combining the current soil shear strength reference value and the current soil permeability coefficient reference value of the loess foundation with the current soil shear strength value and the current soil permeability coefficient value for comprehensive analysis, and obtaining the current soil mechanical stability index of the loess foundation, and the specific formula is as follows: Among them, LxW is the current soil mechanical stability index of loess foundation, JqQ is the current soil shear strength value of loess foundation, JqC is the current soil shear strength reference value of loess foundation, StX is the current soil permeability coefficient value of loess foundation, and StC is the current soil permeability coefficient reference value of loess foundation.

[0015] Furthermore, the collapsibility sensitivity threshold set includes a first collapsibility sensitivity threshold, a second collapsibility sensitivity threshold, and a third collapsibility sensitivity threshold. The current comprehensive collapsibility sensitivity index of the loess foundation is compared and analyzed with the preset collapsibility sensitivity threshold set respectively, and the specific steps of classifying the loess foundation into a collapsibility sensitivity level according to the comparison and analysis results are as follows: if the current comprehensive collapsibility sensitivity index of the loess foundation is lower than the first collapsibility sensitivity threshold, the loess foundation is marked as a collapsibility sensitive no-risk level; if the current comprehensive collapsibility sensitivity index of the loess foundation is higher than the first collapsibility sensitivity threshold and lower than the second collapsibility sensitivity threshold, the loess foundation is marked as a collapsibility sensitive low-risk level; if the current comprehensive collapsibility sensitivity index of the loess foundation is higher than the second collapsibility sensitivity threshold and lower than the third collapsibility sensitivity threshold, the loess foundation is marked as a collapsibility sensitive medium-risk level; if the current comprehensive collapsibility sensitivity index of the loess foundation is higher than the third collapsibility sensitivity threshold, the loess foundation is marked as a collapsibility sensitive high-risk level.

[0016] A collapsible sensitivity evaluation system for loess foundation comprises: a parameter acquisition module, an index analysis module, a collapsible sensitivity analysis module, and an evaluation analysis module; the parameter acquisition module is used to acquire and pre-process the current water state parameter set, the current soil environmental chemical parameter set, the current soil structural parameter set, and the current soil mechanical parameter set of the loess foundation; the index analysis module is used to perform comprehensive analysis on the pre-processed current water state parameter set, the current soil environmental chemical parameter set, the current soil structural parameter set, and the current soil mechanical parameter set of the loess foundation, respectively, to obtain the current water state sensitivity index of the loess foundation. number, current soil environmental chemical stability index, current soil structural stability index, current soil mechanical stability index; the collapsibility sensitivity analysis module is used to comprehensively analyze the current water sensitivity index, current soil environmental chemical stability index, current soil structural stability index, and current soil mechanical stability index of the loess foundation to obtain the current comprehensive collapsibility sensitivity index of the loess foundation; the evaluation and analysis module is used to compare and analyze the current comprehensive collapsibility sensitivity index of the loess foundation with the preset collapsibility sensitivity threshold set, and classify the loess foundation into collapsibility sensitivity levels according to the comparative analysis results.

[0017] The present invention has the following beneficial effects:

[0018] (1) The method for evaluating the collapsibility sensitivity of loess foundation can comprehensively evaluate the stability of loess foundation by collecting and analyzing data from multiple dimensions. Compared with traditional methods, this multi-parameter comprehensive analysis method can more accurately identify foundations of different risk levels and reduce potential risks caused by assessment errors. For example, by simultaneously considering the chemical properties and physical structure of the soil, it can more accurately predict the response of the soil under different environmental conditions, thereby providing a scientific basis for engineering design and land management.

[0019] (2) The loess foundation collapse sensitivity assessment method allows engineers and managers to optimize resource allocation according to specific risk levels through precise risk classification. For example, low-risk areas may not require frequent monitoring or intensive intervention, thus saving costs and resources. At the same time, timely intervention in high-risk areas can prevent potential land and building damage and avoid future repair and compensation costs. This method not only improves the efficiency of resource use, but also enhances the economic and sustainability of the project.

[0020] (3) The method for evaluating the sensitivity of loess foundation to subsidence ensures the safety and reliability of land use through detailed risk assessment. By scientifically classifying risk levels and taking corresponding preventive measures, it can significantly reduce construction accidents and land damage caused by foundation subsidence. In addition, this assessment method can also help to rationally plan land use, such as avoiding heavy construction projects in medium- and high-risk areas, while safely carrying out agricultural, residential and commercial development in low-risk areas, thereby ensuring the maximization of land use and the improvement of social and economic benefits.

[0021] (4) The loess foundation collapsibility sensitivity evaluation system realizes the automation of the entire evaluation process by integrating the parameter acquisition module, index analysis module, collapsibility sensitivity analysis module, and evaluation analysis module, thereby improving the efficiency of monitoring and evaluation. This automated system not only reduces the errors and time consumption of manual operations, but also updates the data and analysis results in real time to ensure the accuracy and real-time nature of the data obtained at every moment. Through automation technology, the system can continuously monitor the changes in the loess foundation and promptly detect potential collapsibility risks, so as to take preventive measures or make necessary interventions before the problem occurs. In addition, real-time monitoring can help engineering teams and decision makers quickly respond to changes in the soil environment, optimize construction plans and land management strategies, and thus ensure the smooth progress of construction projects and the optimization of land use.

[0022] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a flow chart of a method for evaluating the collapsibility sensitivity of loess foundation.

[0024] Figure 2 The present invention is a flowchart of the specific steps for obtaining the current water sensitivity index of a loess foundation in a method for evaluating the collapsibility sensitivity of a loess foundation.

[0025] Figure 3 The present invention is a block diagram of a system for evaluating the collapsibility sensitivity of loess foundation. DETAILED DESCRIPTION

[0026] The embodiment of the present application provides a method and system for evaluating the collapsibility sensitivity of loess foundations, which solves the problem in the prior art that the evaluation of loess is often based on a single or limited sample, which makes it difficult to fully reflect the soil conditions at different depths and locations in the construction area. The measurement error of a single sample may be large. Therefore, in practical applications, this method is likely to lead to inaccurate assessment of the collapsibility sensitivity of loess foundations, thereby affecting the safety of buildings and the effective use of land. Secondly, since the existing evaluation methods often ignore the complexity and diversity of the foundation, the evaluation results are not matched with the actual construction needs in terms of practicality and economic benefits. This mismatch is likely to lead to higher construction costs and longer construction periods, thereby greatly inhibiting the economic benefits and progress of the project.

[0027] The overall idea of ​​the problem in the embodiment of this application is as follows:

[0028] First, the relevant parameters of loess foundation are collected, including water state, environmental chemistry, structure and mechanical parameters. These data involve soil moisture content, groundwater level, organic matter content, electrical conductivity, pH value, soil temperature, dry density, porosity, shear strength and permeability coefficient. After collection, these data are preprocessed, such as cleaning and standardization, to ensure the accuracy and consistency of the data. Using the preprocessed data, each parameter set is comprehensively analyzed to calculate the corresponding sensitivity index, including water state sensitivity index, environmental chemistry stability index, structural stability index and mechanical stability index. These indices are obtained through specific calculation formulas, reflecting the influence of various aspects on the collapsibility sensitivity of loess foundation. The calculated sensitivity indices are integrated to form a comprehensive collapsibility sensitivity index, which is compared with the preset collapsibility sensitivity threshold. According to the results, the loess foundation is divided into no risk, low risk, medium risk or high risk levels. The key to this step is to accurately evaluate the stability of the loess foundation and provide a basis for subsequent management and intervention.

[0029] See also Figure 1The embodiment of the present invention provides a technical solution: a method for evaluating the collapsibility sensitivity of a loess foundation, comprising the following steps: obtaining and preprocessing a current water state parameter set, a current soil environmental chemical parameter set, a current soil structural parameter set, and a current soil mechanical parameter set of the loess foundation; performing comprehensive analysis on the current water state parameter set, the current soil environmental chemical parameter set, the current soil structural parameter set, and the current soil mechanical parameter set of the preprocessed loess foundation to obtain a current water state sensitivity index, a current soil environmental chemical stability index, a current soil structural stability index, and a current soil mechanical stability index of the loess foundation; performing comprehensive analysis on the current water state sensitivity index, the current soil environmental chemical stability index, the current soil structural stability index, and the current soil mechanical stability index of the loess foundation to obtain a current comprehensive collapsibility sensitivity index of the loess foundation; performing comparative analysis on the current comprehensive collapsibility sensitivity index of the loess foundation and a preset collapsibility sensitivity threshold set, and classifying the loess foundation into collapsibility sensitivity levels according to the comparative analysis results.

[0030] The current water state parameter set specifically includes the current soil moisture content value and the current groundwater level value; the current soil environmental chemistry parameter set specifically includes the current soil organic matter content value, the current soil electrical conductivity value and the current soil pH value; the current soil structure parameter set specifically includes the current soil temperature value, the current soil dry density value and the current soil porosity ratio value; the current soil mechanical parameter set specifically includes the current soil shear strength value and the current soil permeability coefficient value.

[0031] The soil moisture value represents the percentage of water in the soil sample, reflecting the wetness of the soil. It is directly obtained using soil moisture sensors, such as capacitive or time domain reflectometry (TDR) sensors. These devices can provide accurate measurements of soil moisture in real time.

[0032] The groundwater level value indicates the height of the groundwater surface relative to the ground, which directly affects the soil moisture status and soil mechanical properties. It is directly obtained through water level meters installed in monitoring wells, such as pressure sensors or ultrasonic water level meters, which can automatically record and transmit groundwater level data.

[0033] The soil organic matter content value indicates the proportion of organic matter in the soil, which affects soil structure and nutrient cycling. It is directly obtained using a near-infrared spectroscopy (NIR) sensor, which can analyze soil samples without destroying the samples and provide an estimate of the organic matter content value.

[0034] The soil conductivity value reflects the content of salt and other dissolved substances in the soil. High conductivity indicates high salt content, which affects plant growth and increases the risk of soil collapse. It is directly obtained using a soil conductivity sensor, that is, the sensor is directly inserted into the soil to provide instant soil conductivity readings.

[0035] Soil pH indicates the acidity and alkalinity of the soil, which has an important influence on the chemical properties and biological activity of the soil. It is directly obtained using a soil pH sensor, which means it can be directly inserted into the soil on site for measurement and real-time monitoring of soil pH changes.

[0036] The soil temperature value indicates the real-time temperature of the soil, which affects water evaporation, biological activity and chemical reaction rate. It is directly obtained through soil temperature sensors, such as thermocouples or thermistors. These devices can provide continuous soil temperature data.

[0037] The soil dry density value indicates the mass of soil per unit volume and is an important indicator for evaluating soil compaction and pore space. It is directly obtained using a nuclear density meter, which uses the principle of radiation attenuation to non-destructively measure the dry density of soil.

[0038] The soil porosity ratio is the ratio of the volume of soil solid particles to the volume of pores, which is key to soil drainage and air capacity. It is usually calculated by comparing the soil dry density value obtained above with the known particle density (such as 2.65g / cm 3 ) calculated.

[0039] The soil shear strength value indicates the ability of soil to resist shear deformation, which critically affects the stability and bearing capacity of the soil. It is directly obtained using portable shear test equipment, such as a portable shear tester.

[0040] The soil permeability coefficient value indicates the ability of the soil to allow water to pass through, which affects the drainage and collapsibility sensitivity of the soil. It is directly obtained using a permeameter.

[0041] In addition, the soil shear strength value and soil permeability coefficient value are the results of taking the average of multiple measurements at multiple points on the loess foundation using a portable shear meter and a permeameter respectively.

[0042] Specifically, the specific formula for calculating the current comprehensive collapsibility sensitivity index of loess foundation is as follows: Among them, SxM is the current comprehensive collapsibility sensitivity index of loess foundation, SwM is the current water sensitivity index of loess foundation, α1 is the water sensitivity coefficient stored in the database, HxW is the current soil environmental chemical stability index of loess foundation, α2 is the soil environmental chemical coefficient stored in the database, WdW is the current soil structure stability index of loess foundation, α3 is the soil structure coefficient stored in the database, LxW is the current soil mechanical stability index of loess foundation, α4 ​​is the soil mechanical coefficient stored in the database, α1+α2+α3+α4=1, e is a natural constant, among which the above data are all unitless data, so they can be directly calculated and analyzed.

[0043] It needs to be explained that the specific calculation process of α1, α2, α3, and α4 is: normalize the current soil moisture reference value and the current groundwater level reference value of the loess foundation respectively, and perform weighted analysis after normalization (the weighted coefficient is the proportion of the two in the sum of the two), to obtain the current water state and value of the loess foundation.

[0044] The current soil organic matter content reference value, the current soil conductivity reference value, and the current soil pH reference value of the loess foundation are normalized respectively, and then weighted analysis is performed after normalization (the weighted coefficient is the proportion of the three in the sum of the three), and the current soil environmental chemistry and value of the loess foundation are obtained.

[0045] The current soil temperature reference value, the current soil dry density reference value, and the current soil porosity reference value of the loess foundation are normalized respectively, and then weighted analysis is performed after normalization (the weighted coefficient is the proportion of the three in the sum of the three), and the current soil structure and value of the loess foundation are obtained.

[0046] The current soil shear strength reference value and the current soil permeability coefficient reference value of the loess foundation are normalized respectively, and then a weighted analysis is performed after the normalization (the weighted coefficient is the proportion of the two in the sum of the two), so as to obtain the current soil strength and value of the loess foundation.

[0047] The current water state and value, current soil environmental chemistry and value, current soil structure and value, current soil strength and value of the loess foundation are summed and analyzed to obtain the current comprehensive collapsibility sensitivity and value of the loess foundation. Then the current water state and value, current soil environmental chemistry and value, current soil structure and value, current soil strength and value of the loess foundation are ratio analyzed with the current comprehensive collapsibility sensitivity and value, and the ratio analysis results are the corresponding coefficients stored in the database.

[0048] In this implementation scheme, different parameters (such as water content, conductivity, pH value, etc.) are converted into unitless standardized values ​​through normalization processing even if they have significant differences in dimension and numerical range. This processing ensures the comparability of data and allows the effective integration of data from different measurement standards and scales, thereby improving the accuracy and reliability of the overall analysis. The weighted analysis takes into account the relative importance of each parameter in the overall evaluation, making the final sensitivity index more representative and targeted. For example, if the water state change in a certain area has a greater impact on collapsibility, then when calculating the comprehensive collapsibility sensitivity index, the water state parameter can be given a higher weight. This method allows the evaluation system to flexibly adjust the influence of each parameter to adapt to the specific geological conditions of different regions. and environmental conditions, the output of the system, namely the comprehensive collapsibility sensitivity index and its comparison with the preset threshold, directly supports the decision-making process, such as the need for preventive measures, improvement plans or adjustments to the monitoring intensity. This precise risk classification not only helps to prevent over-investment (such as investing too much resources in low-risk areas), but also ensures that high-risk areas receive sufficient attention and financial support, thereby achieving a balance between economy and safety. Through the system's dynamic data analysis and real-time update functions, the evaluation method can respond to changes in environmental and geological conditions in a timely manner and predict possible risk development trends. This not only increases the foresight of potential problems in the future, but also provides a time window for taking preventive measures, reduces the probability of sudden land problems, and ensures the safety and sustainability of the project.

[0049] Specifically, Figure 2 As shown in the figure, the specific steps for obtaining the current water sensitivity index of the loess foundation are as follows: obtain the current soil moisture reference value and the current groundwater level reference value of the loess foundation; comprehensively analyze the current soil moisture reference value and the current groundwater level reference value of the loess foundation in combination with the current soil moisture value and the current groundwater level value, and obtain the current water sensitivity index of the loess foundation.

[0050] The specific formula for calculating the current water sensitivity index of loess foundation is as follows: Among them, SwM is the current water sensitivity index of loess foundation, ThS is the current soil moisture content of loess foundation, TsC is the current soil moisture reference value of loess foundation, DxS is the current groundwater level value of loess foundation, and DsC is the current groundwater level reference value of loess foundation.

[0051] Among them, it needs to be explained that the current soil moisture reference value of loess foundation represents the ideal or typical soil moisture content under the current loess foundation conditions. It represents the normal or optimum level of soil moisture in the absence of environmental stress (such as excessive drought or wet conditions). It is obtained by accessing meteorological or soil science databases, which usually collect and provide historical average soil moisture data for specific areas.

[0052] The current groundwater level reference value of loess foundation indicates the ideal or typical groundwater level under the current loess foundation conditions. This value reflects the healthy or balanced state that the groundwater level should maintain under certain environmental and seasonal conditions. The recommended groundwater level is obtained from reports issued by local hydrogeological research institutions. These reports generally provide an ideal range of groundwater levels based on years of observation and analysis, and the median value of the ideal range is used as a reference value.

[0053] In this implementation scheme, by combining actual measured values ​​with ideal or typical reference values, the method can more comprehensively evaluate the water sensitivity of loess foundation. This comparative analysis helps to clarify the deviation between current environmental conditions and ideal conditions, thereby providing data support for further risk assessment and management decisions. This method ensures the objectivity and scientific nature of the assessment, making the assessment results more reliable and useful. By introducing historical and typical reference values, the assessment method not only reflects the current status, but also performs trend analysis and prediction based on historical data. This analysis method that combines history and reality makes the prediction more accurate and provides a powerful decision support tool for land use and engineering construction, which helps to identify potential risks early, take preventive measures, and reduce Reduce possible property losses and safety accidents. Through accurate water sensitivity index, the rational allocation of resources can be effectively guided. For example, if the actual water level in a certain area is significantly different from the reference value, more intensive monitoring or strengthened soil improvement measures may be required. On the contrary, if the actual value is close to the ideal value, the monitoring frequency can be reduced to save costs. This method helps managers make more cost-effective decisions and maximize the return on investment through scientific data analysis. This method helps evaluate and adjust land management strategies to adapt to environmental changes by continuously tracking and comparing the differences between actual water states and ideal water states. This is crucial to adapting to the challenges brought about by climate change and other environmental factors, and can improve the sustainability of land use and ecological balance.

[0054] Specifically, the specific steps for obtaining the current soil environmental chemical stability index of the loess foundation are as follows: obtaining the current soil organic matter content reference value, the current soil conductivity reference value, and the current soil pH reference value of the loess foundation; comprehensively analyzing the current soil organic matter content reference value, the current soil conductivity reference value, and the current soil pH reference value of the loess foundation in combination with the current soil organic matter content value, the current soil conductivity value, and the current soil pH value, respectively, to obtain the current soil environmental chemical stability index of the loess foundation, and the calculation formula is as follows: Among them, HxW is the current soil environmental chemical stability index of loess foundation, YjH is the current soil organic matter content value of loess foundation, YjC is the current soil organic matter content reference value of loess foundation, DdL is the current soil conductivity value of loess foundation, DdC is the current soil conductivity reference value of loess foundation, PH is the current soil PH value of loess foundation, and PHC is the current soil PH reference value of loess foundation.

[0055] Among them, it needs to be explained that the current reference value of soil organic matter content of loess foundation indicates the current soil organic matter content of loess foundation under ideal or standard conditions. This value usually reflects the optimal level of soil fertility and biological activity, which helps to support good vegetation growth and soil structure. It is obtained from the soil research report provided locally.

[0056] The current soil conductivity reference value of loess foundation indicates the ideal conductivity of the soil that the loess foundation should currently have under ideal or standard conditions. This value helps to evaluate the salt management of the soil. Low conductivity usually indicates a lower salt content, which is suitable for the growth of most plants. It is obtained from research reports provided by local environmental monitoring stations or relevant research institutions.

[0057] The current soil pH reference value of loess foundation indicates the pH value of the soil in the loess foundation that is currently in the state of optimal fertility and chemical stability under ideal or standard conditions. Different plants have different requirements for soil pH, but generally speaking, most plants grow best between pH 6.0 and 7.5. It is obtained from publications or databases of agricultural and environmental sciences.

[0058] In this embodiment, by comparing the actual measured values ​​with the reference values ​​under ideal or standard conditions, the evaluation method can accurately reflect the current fertility and biological activity status of the soil, which not only helps to identify possible problems with the soil (such as nutrient deficiency or salinization), but also ensures that soil management measures can improve soil quality in a targeted manner and support healthy vegetation growth. In addition, this method can also help evaluate the sustainable utilization capacity of the soil and provide a scientific basis for long-term land management and agricultural production. Through the comprehensive evaluation of soil organic matter, electrical conductivity and pH value, soil improvement and management strategies can be more effectively guided. For example, if the soil electrical conductivity is higher than the ideal value, it indicates that the soil salinity may be high, and appropriate salt removal measures can be taken at this time. Apply fertilizer or choose salt-tolerant plants for planting; if the soil pH value deviates from the ideal range, the soil pH can be adjusted by applying lime or sulfuric acid to optimize plant growth conditions. This precise soil chemical status assessment helps to formulate more effective soil management plans, improve land use efficiency and crop yields, and an accurate soil environmental chemical stability index can provide important information for land planning and utilization. In environmentally sensitive or restricted areas, such as areas with frequent floods or severe droughts, reasonable soil management and utilization strategies are particularly critical. Through scientific soil chemical assessments, we can ensure that land use strategies match the actual soil conditions, thereby avoiding inappropriate agricultural practices and land development, reducing environmental pressures, and improving the overall health and stability of the ecosystem.

[0059] Specifically, the specific steps for obtaining the current soil structure stability index of the loess foundation are as follows: obtaining the current soil temperature reference value of the loess foundation, the soil temperature allowable change value (the maximum allowable temperature change range value), the current soil dry density reference value, and the current soil porosity reference value; the current soil temperature reference value of the loess foundation, the soil temperature allowable change value (the maximum allowable temperature change range value), the current soil dry density reference value, and the current soil porosity reference value are combined with the current soil temperature value, the current soil dry density value, and the current soil porosity value for comprehensive analysis to obtain the current soil structure stability index of the loess foundation, and the specific formula is as follows: Among them, WdW is the current soil structure stability index of loess foundation, TwD is the current soil temperature value of loess foundation, TwC is the current soil temperature reference value of loess foundation, TwY is the allowable change value of soil temperature of loess foundation, GmD is the current soil dry density value of loess foundation, GmC is the current soil dry density reference value of loess foundation, KxB is the current soil porosity ratio value of loess foundation, and KxC is the current soil porosity ratio reference value of loess foundation.

[0060] Among them, it needs to be explained that the current soil temperature reference value of the loess foundation represents the soil temperature of the loess foundation under the current ideal state, which usually reflects the normal temperature of the soil in the area in the current season. It obtains long-term meteorological data from the local meteorological station, including the average soil temperature, and then performs mean analysis, and uses the mean result as a reference value.

[0061] The allowable variation value of soil temperature of loess foundation (maximum allowable temperature variation range value) indicates the maximum range in which soil temperature is allowed to fluctuate from its average value in order to keep soil functions and biological activity intact. The normal fluctuation range of soil temperature is obtained from research reports on soil temperature conducted by environmental or agricultural research institutions.

[0062] The current soil dry density reference value of loess foundation indicates the soil dry density of loess foundation under the current ideal state, reflecting the normal state of the soil when it is not affected by physical processes such as compaction or expansion. The ideal dry density value of the soil is obtained from soil testing agencies or building specifications.

[0063] The current soil porosity reference value of loess foundation represents the ideal soil porosity, which indicates the ideal ratio of pore space to solid material in the loess foundation soil under the current ideal state. The ideal porosity of this loess foundation soil type is obtained from soil science literature or research.

[0064] In this embodiment, by combining the actual measured values ​​of the current soil temperature, dry density and porosity with the ideal reference values, the method can accurately evaluate the structural stability of the soil. This comprehensive evaluation takes into account multiple aspects of the physical properties of the soil, ensuring the comprehensiveness and comprehensiveness of the evaluation. The ideal reference value provides a standard for the evaluation, making it possible to objectively judge whether the current state of the soil is suitable for the expected land use or construction activities. By understanding the structural stability of the soil in advance, engineering failures or ecological damage caused by soil structural problems can be prevented. For example, if the dry density and porosity of the soil indicate that the soil is prone to compression or collapse, corresponding improvement measures can be taken before construction, such as selecting appropriate foundation reinforcement technology or changing the construction plan. This preventive management reduces the cost of subsequent repair and maintenance and improves the safety and reliability of the project. An accurate soil structure stability index can help land planners and decision makers to rationally plan land use and resource allocation. For example, areas with higher soil structure stability can be planned as heavy-load construction projects or important agricultural production areas; areas with lower soil structure stability can adopt more conservative land use strategies, such as setting up parks or other low-impact uses. This not only improves the efficiency of land use, but also helps protect the environment and prevent environmental problems caused by improper land use. By monitoring the allowable range and real-time status of soil temperature, the soil's ability to respond to environmental changes can be evaluated, especially in areas with significant climate change. This information is crucial for predicting the possible response of the soil and helps to take timely adaptation measures to reduce the negative impact of climate change on soil structure and function.

[0065] Specifically, the specific steps for obtaining the current soil mechanical stability index of the loess foundation are as follows: obtain the current soil shear strength reference value and the current soil permeability coefficient reference value of the loess foundation; comprehensively analyze the current soil shear strength reference value and the current soil permeability coefficient reference value of the loess foundation in combination with the current soil shear strength value and the current soil permeability coefficient value, respectively, to obtain the current soil mechanical stability index of the loess foundation, and the specific formula is as follows: Among them, LxW is the current soil mechanical stability index of loess foundation, JqQ is the current soil shear strength value of loess foundation, JqC is the current soil shear strength reference value of loess foundation, StX is the current soil permeability coefficient value of loess foundation, and StC is the current soil permeability coefficient reference value of loess foundation.

[0066] Among them, it needs to be explained that the current soil shear strength reference value of loess foundation refers to the shear strength that the loess foundation should currently have under ideal or typical conditions. Shear strength is the ability of soil to resist shear deformation and damage, which is crucial for evaluating the stability of soil and its ability to support structures. The recommended value of soil shear strength is obtained from local construction and engineering standards.

[0067] The current soil permeability reference value of loess foundation indicates the permeability that the soil of loess foundation should currently have under ideal conditions without pollution or structural changes. The permeability reflects the ability of soil to allow water and other fluids to pass through. It is a key indicator for evaluating soil drainage and environmental sensitivity. The standard value of the permeability is obtained from the hydrogeological report of the loess area.

[0068] In this embodiment, by accurately calculating the shear strength and permeability coefficient of the soil, this method can effectively evaluate the behavior and response of the soil under different engineering loads. The shear strength is a key indicator for determining whether the soil can support the structural load, while the permeability coefficient is related to the soil's drainage capacity and stability under long-term water flow. An accurate mechanical stability index helps predict the performance of the soil in actual engineering applications, thereby guiding engineering design and construction to ensure the safety and durability of buildings and infrastructure. Accurate understanding of the permeability of the soil helps optimize water resource management and prevent water-related environmental problems, such as groundwater pollution and surface water accumulation. For example, highly permeable soils may require specific management measures to prevent pollutants from quickly penetrating into the groundwater layer. At the same time, low permeability soils may cause severe water accumulation during floods and require special drainage solutions. Through this analysis, Adaptive measures can be formulated in advance to reduce the impact of natural disasters and human activities on the environment. An accurate soil mechanical stability index can help land planners and developers make more reasonable land use decisions. For example, soils with high shear strength and suitable permeability coefficients may be more suitable for the construction of heavy buildings or industrial facilities, while soils with low shear strength and high permeability coefficients may be more suitable for agriculture or protected areas. This assessment method can maximize the benefits of land resources while taking into account the needs of environmental protection and sustainable development. By comparing actual measured values ​​with ideal reference values, soil defects and deficiencies can be identified, so that soil remediation and improvement can be carried out in a targeted manner. For example, if the measured soil shear strength is lower than the ideal value, it may be necessary to increase its bearing capacity by compaction or adding stabilizing materials. Such targeted improvement measures can ensure the durability and effectiveness of the remediation effect.

[0069] Specifically, the collapsibility sensitivity threshold set includes a first collapsibility sensitivity threshold, a second collapsibility sensitivity threshold, and a third collapsibility sensitivity threshold. The current comprehensive collapsibility sensitivity index of the loess foundation is compared and analyzed with the preset collapsibility sensitivity threshold set respectively, and the specific steps of classifying the loess foundation into collapsibility sensitivity levels according to the comparison and analysis results are as follows: if the current comprehensive collapsibility sensitivity index of the loess foundation is lower than the first collapsibility sensitivity threshold, the loess foundation is marked as a collapsibility sensitive no-risk level; if the current comprehensive collapsibility sensitivity index of the loess foundation is higher than the first collapsibility sensitivity threshold and lower than the second collapsibility sensitivity threshold, the loess foundation is marked as a collapsibility sensitive low-risk level; if the current comprehensive collapsibility sensitivity index of the loess foundation is higher than the second collapsibility sensitivity threshold and lower than the third collapsibility sensitivity threshold, the loess foundation is marked as a collapsibility sensitive medium-risk level; if the current comprehensive collapsibility sensitivity index of the loess foundation is higher than the third collapsibility sensitivity threshold, the loess foundation is marked as a collapsibility sensitive high-risk level.

[0070] Among them, the first collapsibility sensitivity threshold, which is the lowest threshold, is usually based on the lower limit of the stable state of the soil before collapsing in historical data, and is used to distinguish between no risk and low risk levels. If the comprehensive soil collapsibility sensitivity index is lower than this threshold, it means that the soil structure is stable and the possibility of being affected by collapsing is extremely low, and usually no special measures are required.

[0071] The second collapsibility sensitivity threshold is used to distinguish between low-risk and medium-risk levels. It is set according to the parameter range at which the soil begins to show signs of collapsing but has not yet reached a dangerous state. Soil that exceeds this threshold but does not reach the third threshold has a certain risk of collapsing and requires regular monitoring and some preventive measures, such as improving the drainage system or using foundation reinforcement technology.

[0072] The third collapsibility sensitivity threshold, which is the highest threshold, is usually based on the upper limit of the stable state that the soil exhibited before collapsing in historical data and is used to distinguish between medium and high risk levels. Soils exceeding this threshold indicate a serious collapsibility problem and require urgent measures to prevent possible structural damage or other serious consequences.

[0073] In this implementation scheme, by setting clear collapse sensitivity thresholds, this method can accurately identify and classify the risk level of loess foundations. Each threshold corresponds to a different risk level, from no risk to high risk. This classification enables engineers and land managers to have a clearer understanding of the current condition of the soil and take appropriate measures based on the actual risk level. This method helps to avoid a "one-size-fits-all" management strategy, but instead allows targeted treatment of soil problems and improves the efficiency and effectiveness of treatment measures. By distinguishing different risk levels, resources can be reasonably allocated to ensure that high-risk areas receive sufficient attention and investment, while avoiding unnecessary or excessive intervention in low-risk areas. For example, more expensive foundation improvement measures will only be taken when the soil collapse sensitivity index exceeds the high-risk threshold. This strategy The strategy not only reduces unnecessary expenditures, but also ensures that limited financial and material resources are used where they are most needed. Through the threshold system, soil areas that are close to or have exceeded critical risk points can be identified in a timely manner, and early warnings can be given, preventive measures can be taken, or emergency responses can be prepared. This predictive and forward-looking management strategy helps prevent possible disasters, such as preventing heavy construction projects from being carried out in high-risk areas that are sensitive to waterlogging, thereby significantly reducing potential economic losses and personnel safety risks. During the project planning and implementation stages, through clear waterlogging sensitivity risk assessments, engineering solutions and construction technologies can be selected more scientifically to avoid the use of inappropriate construction methods in high-risk areas. This approach further ensures the long-term stability and reliability of construction projects by reducing possible future maintenance problems and the risk of engineering failures.

[0074] The specific example of classifying the collapsibility sensitivity of loess foundation is as follows, and the existing data are as follows:

[0075] Current soil moisture value: 18%.

[0076] Reference value of soil moisture content: 15%.

[0077] Current groundwater level: 2.8 meters.

[0078] Reference value of groundwater level: 3 meters.

[0079] Current soil organic matter content value: 3%.

[0080] Reference value of soil organic matter content: 3.5%.

[0081] Current soil conductivity value: 1.5dS / m.

[0082] Reference value of soil conductivity: 1.0dS / m.

[0083] Current soil pH: 7.0.

[0084] Soil PH reference value: 6.8.

[0085] Current soil temperature: 18℃.

[0086] Reference soil temperature: 20℃.

[0087] Allowable variation of soil temperature: 5℃.

[0088] Current soil dry density: 1.6g / cm 3 .

[0089] Soil dry density reference value: 1.8g / cm 3 .

[0090] Current soil porosity ratio: 0.45.

[0091] Reference value of soil porosity ratio: 0.50.

[0092] Current soil shear strength value: 120kPa.

[0093] Reference value of soil shear strength: 150kPa.

[0094] Current soil permeability coefficient value: 1.2×10 -5 cm / s.

[0095] Soil permeability coefficient reference value: 1.0×10 -5 cm / s.

[0096] The first collapsibility sensitivity threshold: 0.2, that is, when the comprehensive collapsibility sensitivity index of loess foundation is lower than 0.2, the soil is considered to have no risk of collapsibility.

[0097] The second collapsibility sensitivity threshold: 0.5, that is, when the comprehensive collapsibility sensitivity index of loess foundation is between 0.2 and 0.5, the soil is considered to have a low to medium risk of collapsibility and requires regular monitoring.

[0098] The third collapsibility sensitivity threshold is 0.8. That is, if the collapsibility sensitivity index exceeds 0.8, it is considered that there is a serious collapsibility problem in the loess foundation and emergency measures must be taken immediately.

[0099] From the above parameters, the specific calculation process of the current water state and value of the loess foundation is as follows:

[0100] The normalized value of soil moisture content=15% / 100%=0.15. In this embodiment, the reference maximum value of soil moisture content is 100%.

[0101] The normalized value of the groundwater level=3 meters / 10 meters=0.3. In this embodiment, the reference maximum groundwater level is 10 meters.

[0102] The current water state and value of the loess foundation = (0.15*0.33)+(0.3*0.67)=0.2505.

[0103] Based on the above parameters, the specific calculation process of the current soil environmental chemistry and value of the loess foundation is as follows:

[0104] The normalized value of soil organic matter content=3.5% / 10%=0.35. In this embodiment, the maximum reference value of the organic matter content is 10%.

[0105] The normalized value of soil conductivity=1.0 dS / m / 2.0 dS / m=0.5. In this embodiment, the maximum reference value of conductivity is 2.0 dS / m.

[0106] Soil pH normalized value=6.8 / 14≈0.486. In this embodiment, the standard range of pH value is 1-14, that is, the maximum pH value is 14.

[0107] The current soil environmental chemistry and value of loess foundation = (0.35*0.262)+(0.5*0.374)+(0.486*0.364)=0.4556.

[0108] From the above parameters, the specific calculation process of the current soil structure and value of the loess foundation is as follows:

[0109] The normalized value of soil temperature = 20°C / 50°C = 0.4. In this embodiment, the maximum possible range of soil temperature is 50°C.

[0110] Normalized soil dry density = 1.8 g / cm 3 / 2.5g / cm 3 =0.72. In this embodiment, the maximum reference value of soil dry density is 2.5 g / cm 3 .

[0111] The normalized value of soil porosity ratio=0.5 / 1.0=0.5. In this embodiment, the maximum reference porosity ratio is 1.0.

[0112] The current soil structure and value of loess foundation = (0.4*0.247)+(0.72*0.444)+(0.5*0.309)=0.57298.

[0113] From the above parameters, the specific calculation process of the current soil mechanical properties and values ​​of the loess foundation is as follows:

[0114] Normalized value of soil shear strength=150 kPa / 300 kPa=0.5. In this embodiment, the maximum reference soil shear strength is 300 kPa.

[0115] Normalized value of soil permeability coefficient = 1.0 × 10 -5 cm / s / 5.0×10 -5 cm / s=0.2. In this embodiment, the maximum reference permeability coefficient is 5.0×10 -5 cm / s.

[0116] The current soil strength and value of loess foundation = (0.5*0.714)+(0.2*0.286)=0.4142. Therefore, the specific calculation process of water sensitivity coefficient, soil environmental chemical coefficient, soil structure coefficient and soil strength coefficient is:

[0117] Water sensitivity coefficient = 0.2505 / (0.2505+0.4556+0.57298+0.4142)≈0.148.

[0118] Soil environmental chemical coefficient = 0.4556 / (0.2505+0.4556+0.57298+0.4142)≈0.269.

[0119] Soil structure coefficient = 0.57298 / (0.2505+0.4556+0.57298+0.4142)≈0.338.

[0120] Soil mechanical coefficient = 0.4142 / (0.2505+0.4556+0.57298+0.4142)≈0.245. Substituting the above data into the specific formula of the current comprehensive collapsible sensitivity index of loess foundation, we get:

[0121] Ln(1+(0.148*(1.2*0.933)+0.269*(0.857*0.223*0.971)+0.338*(1.4*0.889*0.1)+0. 245*(0.8*1.2)) / 1.198)=ln(1+(0.166+0.05+0.042+0.2352) / 1.198)≈ln1.412≈0.345.

[0122] It is obtained that the current comprehensive collapsibility sensitivity index of the loess foundation is 0.345, which is between the first collapsibility sensitivity threshold and the second collapsibility sensitivity threshold: 0.2-0.5. Therefore, it is concluded that the loess foundation is at medium risk of collapsibility and requires regular monitoring.

[0123] See also Figure 3The embodiment of the present invention provides a technical solution: a collapsible sensitivity evaluation system for loess foundation, comprising: a parameter acquisition module, an index analysis module, a collapsible sensitivity analysis module, and an evaluation analysis module; the parameter acquisition module is used to acquire and pre-process the current water state parameter set, the current soil environmental chemical parameter set, the current soil structure parameter set, and the current soil mechanical parameter set of the loess foundation; the index analysis module is used to perform comprehensive analysis on the current water state parameter set, the current soil environmental chemical parameter set, the current soil structure parameter set, and the current soil mechanical parameter set of the pre-processed loess foundation, respectively, to obtain the collapsible sensitivity evaluation module of the loess foundation. The current water sensitivity index, current soil environmental chemical stability index, current soil structural stability index, and current soil mechanical stability index of the loess foundation are comprehensively analyzed by the collapsible sensitivity analysis module to obtain the current comprehensive collapsible sensitivity index of the loess foundation; the evaluation and analysis module is used to compare and analyze the current comprehensive collapsible sensitivity index of the loess foundation with the preset collapsible sensitivity threshold set, and classify the loess foundation into collapsible sensitivity levels according to the comparative analysis results.

[0124] In summary, this application has at least the following effects:

[0125] By collecting and analyzing data from multiple dimensions, the stability of loess foundations can be comprehensively evaluated. Compared with traditional methods, this multi-parameter comprehensive analysis method can more accurately identify foundations of different risk levels and reduce potential risks caused by assessment errors. For example, by simultaneously considering the chemical properties and physical structure of the soil, the soil's response under different environmental conditions can be more accurately predicted, thus providing a scientific basis for engineering design and land management.

[0126] Accurate risk classification allows engineers and managers to optimize resource allocation according to specific risk levels. For example, low-risk areas may not require frequent monitoring or in-depth intervention, thus saving costs and resources. At the same time, timely intervention in high-risk areas can prevent potential land and building damage and avoid future repair and compensation costs. This approach not only improves the efficiency of resource use, but also enhances the economic and sustainability of the project.

[0127] The safety and reliability of land use are ensured through meticulous risk assessment. By scientifically classifying risk levels and taking corresponding preventive measures, construction accidents and land damage caused by foundation collapse can be significantly reduced. In addition, this assessment method also helps to rationally plan land use, such as avoiding heavy construction projects in medium- and high-risk areas, while safely carrying out agricultural, residential and commercial development in low-risk areas, thereby ensuring maximum land use and improved socio-economic benefits.

[0128] By integrating the parameter acquisition module, index analysis module, collapsibility sensitivity analysis module, and evaluation analysis module, the entire evaluation process is automated, thereby improving the efficiency of monitoring and evaluation. This automated system not only reduces manual operation errors and time consumption, but also updates data and analysis results in real time to ensure the accuracy and real-time nature of the data obtained at every moment. Through automation technology, the system can continuously monitor changes in loess foundations and promptly detect potential collapsibility risks, so as to take preventive measures or make necessary interventions before problems occur. In addition, real-time monitoring can help engineering teams and decision makers quickly respond to changes in the soil environment, optimize construction plans and land management strategies, and thus ensure the smooth progress of construction projects and the optimization of land use.

[0129] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0130] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for evaluating the collapsibility sensitivity of loess foundation, characterized in that: The following steps are involved: Obtain and preprocess the current water state parameter set, current soil environmental chemical parameter set, current soil structure parameter set, and current soil mechanical parameter set of the loess foundation; Comprehensive analysis is performed on the current water state parameter set, current soil environmental chemical parameter set, current soil structural parameter set, and current soil mechanical parameter set of the pre-treated loess foundation to obtain the current water state sensitivity index, current soil environmental chemical stability index, current soil structural stability index, and current soil mechanical stability index of the loess foundation; The current comprehensive collapsibility sensitivity index of the loess foundation is obtained by comprehensively analyzing the current water sensitivity index, current soil environmental chemical stability index, current soil structural stability index, and current soil mechanical stability index of the loess foundation. The current comprehensive collapsibility sensitivity index of loess foundation is compared and analyzed with the preset collapsibility sensitivity threshold set, and the loess foundation is classified into collapsibility sensitivity levels according to the comparative analysis results; The current water state parameter set specifically includes the current soil moisture content value and the current groundwater level value; the current soil environmental chemical parameter set specifically includes the current soil organic matter content value, the current soil electrical conductivity value, and the current soil pH value; the current soil structure parameter set specifically includes the current soil temperature value, the current soil dry density value, and the current soil porosity ratio value; the current soil mechanical parameter set specifically includes the current soil shear strength value and the current soil permeability coefficient value; The specific formula for calculating the current comprehensive collapsibility sensitivity index of loess foundation is as follows: Among them, SxM is the current comprehensive collapsibility sensitivity index of loess foundation, SwM is the current water sensitivity index of loess foundation, α1 is the water sensitivity coefficient stored in the database, HxW is the current soil environmental chemical stability index of loess foundation, α2 is the soil environmental chemical coefficient stored in the database, WdW is the current soil structure stability index of loess foundation, α3 is the soil structure coefficient stored in the database, LxW is the current soil mechanical stability index of loess foundation, α4 ​​is the soil mechanical coefficient stored in the database, α1+α2+α3+α4=1, and e is a natural constant; The specific steps to obtain the current water sensitivity index of loess foundation are as follows: Obtain the current soil moisture reference value and the current groundwater level reference value of the loess foundation; The current soil moisture reference value and the current groundwater level reference value of the loess foundation are combined with the current soil moisture value and the current groundwater level value of the loess foundation for comprehensive analysis to obtain the current water state sensitivity index of the loess foundation; The specific formula for calculating the current water sensitivity index of loess foundation is as follows: Among them, SwM is the current water sensitivity index of loess foundation, ThS is the current soil moisture value of loess foundation, TsC is the current soil moisture reference value of loess foundation, DxS is the current groundwater level value of loess foundation, and DsC is the current groundwater level reference value of loess foundation; The specific steps to obtain the current soil environmental chemical stability index of loess foundation are as follows: Obtain the current soil organic matter content reference value, current soil conductivity reference value, and current soil pH reference value of the loess foundation; The current soil organic matter content reference value, the current soil conductivity reference value, and the current soil pH reference value of the loess foundation are combined with the current soil organic matter content value, the current soil conductivity value, and the current soil pH value of the loess foundation for comprehensive analysis to obtain the current soil environmental chemical stability index of the loess foundation. The calculation formula is as follows: Among them, HxW is the current soil environmental chemical stability index of loess foundation, YjH is the current soil organic matter content value of loess foundation, YjC is the current soil organic matter content reference value of loess foundation, DdL is the current soil conductivity value of loess foundation, DdC is the current soil conductivity reference value of loess foundation, PH is the current soil PH value of loess foundation, and PHC is the current soil PH reference value of loess foundation.

2. The method for evaluating the collapsibility sensitivity of loess foundation according to claim 1, characterized in that: The specific steps to obtain the current soil structure stability index of loess foundation are as follows: Obtain the current soil temperature reference value, soil temperature allowable change value, current soil dry density reference value, and current soil porosity ratio reference value of the loess foundation; The current soil temperature reference value, soil temperature allowable change value, current soil dry density reference value, and current soil porosity reference value of the loess foundation are combined with the current soil temperature value, current soil dry density value, and current soil porosity value of the loess foundation for comprehensive analysis to obtain the current soil structure stability index of the loess foundation. The specific formula is as follows: Among them, WdW is the current soil structure stability index of loess foundation, TwD is the current soil temperature value of loess foundation, TwC is the current soil temperature reference value of loess foundation, TwY is the allowable change value of soil temperature of loess foundation, GmD is the current soil dry density value of loess foundation, GmC is the current soil dry density reference value of loess foundation, KxB is the current soil porosity ratio value of loess foundation, and KxC is the current soil porosity ratio reference value of loess foundation.

3. The method for evaluating the collapsibility sensitivity of loess foundation according to claim 1, characterized in that: The specific steps to obtain the current soil mechanical stability index of loess foundation are as follows: Obtain the current soil shear strength reference value and the current soil permeability coefficient reference value of the loess foundation; The current soil shear strength reference value and the current soil permeability coefficient reference value of the loess foundation are combined with the current soil shear strength value and the current soil permeability coefficient value of the loess foundation for comprehensive analysis to obtain the current soil mechanical stability index of the loess foundation. The specific formula is as follows: Among them, LxW is the current soil mechanical stability index of loess foundation, JqQ is the current soil shear strength value of loess foundation, JqC is the current soil shear strength reference value of loess foundation, StX is the current soil permeability coefficient value of loess foundation, and StC is the current soil permeability coefficient reference value of loess foundation.

4. The method for evaluating the collapsibility sensitivity of loess foundation according to claim 1, characterized in that: The collapsibility sensitivity threshold set includes a first collapsibility sensitivity threshold, a second collapsibility sensitivity threshold, and a third collapsibility sensitivity threshold. The current comprehensive collapsibility sensitivity index of the loess foundation is compared and analyzed with the preset collapsibility sensitivity threshold set, and the specific steps of classifying the loess foundation into collapsibility sensitivity levels according to the comparison and analysis results are as follows: If the current comprehensive collapsibility sensitivity index of the loess foundation is lower than the first collapsibility sensitivity threshold, the loess foundation is marked as collapsible sensitivity without risk level; If the current comprehensive collapsibility sensitivity index of the loess foundation is higher than the first collapsibility sensitivity threshold and lower than the second collapsibility sensitivity threshold, the loess foundation is marked as a low risk level of collapsibility sensitivity; If the current comprehensive collapsibility sensitivity index of the loess foundation is higher than the second collapsibility sensitivity threshold and lower than the third collapsibility sensitivity threshold, the loess foundation is marked as a medium risk level of collapsibility sensitivity; If the current comprehensive collapsibility sensitivity index of the loess foundation is higher than the third collapsibility sensitivity threshold, the loess foundation will be marked as a high risk level of collapsibility sensitivity.

5. A system for evaluating the collapsibility sensitivity of loess foundation, using the method for evaluating the collapsibility sensitivity of loess foundation according to any one of claims 1 to 4, characterized in that: include: Parameter acquisition module, index analysis module, collapsibility sensitivity analysis module, and evaluation analysis module; The parameter acquisition module is used to acquire and pre-process the current water state parameter set, the current soil environmental chemical parameter set, the current soil structure parameter set, and the current soil mechanical parameter set of the loess foundation; The index analysis module is used to comprehensively analyze the current water state parameter set, the current soil environmental chemical parameter set, the current soil structural parameter set, and the current soil mechanical parameter set of the pre-treated loess foundation, respectively, to obtain the current water state sensitivity index, the current soil environmental chemical stability index, the current soil structural stability index, and the current soil mechanical stability index of the loess foundation; The collapsibility sensitivity analysis module is used to comprehensively analyze the current water sensitivity index of the loess foundation, the current soil environmental chemical stability index, the current soil structural stability index, and the current soil mechanical stability index to obtain the current comprehensive collapsibility sensitivity index of the loess foundation; The evaluation and analysis module is used to compare and analyze the current comprehensive collapsible sensitivity index of the loess foundation with the preset collapsible sensitivity threshold set, and classify the loess foundation into collapsible sensitivity levels according to the comparison and analysis results.

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