A soil engineering geology classification method
By measuring the penetration value using penetration nails at soil marker points and classifying the soil for engineering geology, the problem of the lack of mechanical property indicators in existing soil classification methods is solved, achieving high-precision soil classification and construction reference.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
- Filing Date
- 2022-11-23
- Publication Date
- 2026-05-15
AI Technical Summary
Existing soil engineering geological classification methods are mainly based on the physical properties of soil, lacking the introduction of soil mechanical property indicators, and thus cannot provide reasonable reference for subsequent construction.
By marking multiple test points on the soil to be tested, penetrating each point with the same kinetic energy using a penetrating nail, measuring the penetration value, generating a penetration value statistics table, and classifying the soil according to its strength, calculating the classification interval value, forming a penetration interval, converting it into an engineering geological category, and finally characterizing the engineering geological classification of the soil on a numbered topographic map.
It enables the quantification of soil mechanical properties, improves classification accuracy, reduces errors, and provides a reasonable reference for construction from the perspective of soil mechanical properties.
Smart Images
Figure CN115730235B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of geotechnical engineering technology, specifically to a method for classifying soil engineering geology. Background Technology
[0002] In the field of geotechnical engineering, the mechanical strength of soil is an important indicator for evaluating soil quality and a crucial basis for construction decisions. It relates to issues such as the stability of soil slopes, soil foundation settlement, and the suitability of material selection. Therefore, classifying soil based on its mechanical strength is of paramount importance.
[0003] Existing soil engineering geological classification methods generally classify soils based on one or more indicators such as soil formation type, material composition, and density. However, these methods are mainly based on the physical properties of soils, and the introduction of soil mechanical properties is relatively scarce, which cannot provide reasonable reference for subsequent construction. Summary of the Invention
[0004] The purpose of this invention is to provide a soil engineering geological classification method that can solve the technical problem of the lack of soil mechanical property indicators in existing soil engineering geological classification methods.
[0005] This invention is achieved through the following technical solution:
[0006] A method for classifying soil in engineering geology includes the following steps:
[0007] Mark multiple test points on the soil to be tested;
[0008] Measure the coordinates of each of the points to be measured, and mark the coordinates of each of the points to be measured on the topographic map to obtain a numbered topographic map;
[0009] A penetration pin is obtained, and each of the test points is penetrated with the same kinetic energy using the penetration pin to obtain the penetration value of each test point, and a penetration value statistics table is generated.
[0010] Based on the soil strength, the soil to be tested is geologically classified to obtain multiple engineering geological categories of the soil to be tested, and a soil strength table is generated.
[0011] Based on the penetration value statistics table and the soil strength table, the classification interval value is calculated. The data interval formed by all the penetration values is divided equally according to the classification interval value to obtain multiple penetration intervals, and a soil engineering geological classification system table based on penetration value is generated.
[0012] According to the soil engineering geological classification system table based on penetration value, the penetration value in the penetration value statistics table is converted into the corresponding engineering geological category to obtain the soil engineering geological classification table of the test point;
[0013] Based on the engineering geological classification table of the soil at the test site, the soil to be tested is characterized by engineering geological classification on the numbered topographic map.
[0014] Optionally, the step of classifying and characterizing the soil to be tested according to the engineering geological classification table of the soil at the test point on the numbered topographic map includes the following steps:
[0015] The engineering geological category corresponding to each test point in the engineering geological classification table is marked on the numbered topographic map to form multiple blocks with the same engineering geological category.
[0016] The boundaries of each block are drawn on the numbered topographic map to classify and characterize the soil to be tested for engineering geology.
[0017] Optionally, when drawing the boundary, it is drawn from the center of the numbered topographic map outwards.
[0018] Optionally, when the number of test points included in any block is less than a preset value, the engineering geological category corresponding to the block is reduced by one level.
[0019] Optionally, calculating the classification interval value based on the penetration value statistics table and the soil strength table includes the following steps:
[0020] According to the penetration value statistics table, the maximum and minimum penetration values are obtained, and the difference between the maximum and minimum values is calculated to obtain the penetration difference;
[0021] Based on the soil strength table, the total number of all engineering geological categories is obtained;
[0022] The ratio of the penetration difference to the number of classes is calculated to obtain the classification interval value.
[0023] Optionally, the step of dividing the data interval formed by all the penetration values equally according to the classification interval value to obtain multiple penetration intervals includes the following steps:
[0024] According to the penetration value statistics table, the maximum and minimum penetration values are obtained;
[0025] The closed interval formed by the maximum value and the minimum value is divided into multiple penetration intervals, and the difference between the maximum value and the minimum value of each penetration interval is the classification interval value.
[0026] Optionally, the step of using the penetrating nail to penetrate each of the test points with the same kinetic energy to obtain the penetration value of each of the test points includes the following steps:
[0027] The surface of the plumb bob to be tested is obtained by tidying up at each of the test points;
[0028] The penetration nail is used to penetrate each of the tested plumb surfaces multiple times with the same kinetic energy and a second preset interval, and a set of penetration values is obtained for each of the tested plumb surfaces.
[0029] Calculate the average value of each of the penetration value groups to obtain the penetration value of each of the test points.
[0030] Optionally, marking multiple test points on the soil to be tested includes the following steps:
[0031] Engineering geological mapping was performed on the soil to be tested, and multiple vertical profiles were obtained;
[0032] On each of the vertical sections, multiple test points are marked at a first preset interval.
[0033] Optionally, converting the penetration values in the penetration value statistics table into the corresponding engineering geological category includes the following steps:
[0034] The penetration value of each test point is compared with the numerical range of all penetration intervals to confirm the penetration interval corresponding to the penetration value.
[0035] Confirm the engineering geological category corresponding to the penetration section;
[0036] Replace the penetration value with the corresponding engineering geological category.
[0037] Optionally, the following steps may also be included:
[0038] Determine the geological conditions of the test site. If the geological conditions are complex, lower the corresponding engineering geological category in the engineering geological classification table of the soil at the test site by one level to revise the engineering geological classification table of the soil at the test site.
[0039] Compared with the prior art, the present invention has the following advantages and beneficial effects:
[0040] This invention provides a method for engineering geological classification of soil. It involves marking multiple test points on the soil to be tested, penetrating each point with a penetration tester to obtain a penetration value, and then quantifying the mechanical strength of the soil at each test point using this value. Based on this, the soil is geologically classified according to its strength to preliminarily determine all engineering geological categories encompassed by the soil as a whole. Furthermore, by calculating classification interval values, a correspondence is established between the penetration value and the engineering geological category, thus converting the penetration value of each test point into its corresponding engineering geological category, thereby determining the engineering geological category of each test point. Finally, a numbered topographic map is drawn, marking the engineering geological category of each test point, effectively representing the engineering geological category classification of different parts of the soil. This method is simple and easy to implement, can be directly applied to the soil to be tested, and the quantification of penetration values effectively improves classification accuracy and reduces errors. Therefore, this method can provide a reasonable reference for subsequent construction from the perspective of soil mechanical properties. Attached Figure Description
[0041] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:
[0042] Figure 1 A flowchart of the soil engineering geological classification method provided by the present invention. Detailed Implementation
[0043] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.
[0044] First, it should be noted that during their research and experimentation, the inventors discovered that the penetration depth of soils of different strengths by a penetrating nail with the same kinetic energy exhibits a clear regularity: soils with lower mechanical strength have a larger penetration depth, while soils with higher mechanical strength have a smaller penetration depth. Therefore, using a penetrating nail to test and characterize the mechanical properties of soil is sufficiently feasible.
[0045] It should be noted that the penetrating nail refers to a nail-like object with a pointed tip for penetrating.
[0046] Please refer to Figure 1 This invention provides a method for classifying soil in engineering geology, comprising the following steps:
[0047] S1. Mark multiple test points on the soil to be tested;
[0048] S2. Measure the coordinates of each of the points to be measured, and mark the coordinates of each of the points to be measured on the topographic map to obtain a numbered topographic map;
[0049] S3. Obtain the penetration nail, and use the penetration nail to penetrate each of the test points with the same kinetic energy to obtain the penetration value of each of the test points and generate a penetration value statistics table.
[0050] S4. Based on the soil strength, the soil to be tested is geologically classified to obtain multiple engineering geological categories of the soil to be tested, and a soil strength table is generated.
[0051] S5. Based on the penetration value statistics table and the soil strength table, calculate the classification interval value, divide the data interval formed by all the penetration values equally according to the classification interval value to obtain multiple penetration intervals, and generate a soil engineering geological classification system table based on the penetration value.
[0052] S6. According to the soil engineering geological classification system table based on penetration value, convert the penetration value in the penetration value statistics table into the corresponding engineering geological category to obtain the soil engineering geological classification table of the test point.
[0053] S7. Based on the engineering geological classification table of the soil at the test point, classify and characterize the soil at the test point on the numbered topographic map.
[0054] The soil engineering geological classification method provided by this invention involves marking multiple test points on the soil to be tested, penetrating each test point with a penetration tester to obtain a penetration value, and using the penetration value to quantify the mechanical strength of the soil at the test point. Based on this, the soil to be tested is geologically classified according to strength to initially determine all engineering geological categories encompassed by the soil as a whole. Furthermore, by calculating classification interval values, a correspondence is established between the penetration value and the engineering geological category, thereby converting the penetration value of each test point into its corresponding engineering geological category, thus determining the engineering geological category of each test point. Finally, a numbered topographic map is drawn, marking the engineering geological category of each test point, effectively representing the engineering geological category classification of different parts of the soil to be tested. This method is simple and easy to implement, can be directly applied to the soil to be tested, and the quantification of penetration value data effectively improves classification accuracy and reduces errors. Therefore, this method can provide a reasonable reference for subsequent construction from the perspective of soil mechanical properties.
[0055] Furthermore, marking multiple test points on the soil to be tested includes the following steps:
[0056] S1.1 Perform engineering geological mapping on the soil to be tested to obtain multiple vertical profiles;
[0057] It should be noted that engineering geological mapping is carried out using multiple mutually perpendicular profiles, which can significantly improve the geometric spatial coverage of engineering geological mapping.
[0058] S1.2 Mark multiple test points on each vertical profile at a first preset interval.
[0059] Specifically, the marking method involves spraying paint onto the test points and marking the test number next to the test points.
[0060] Furthermore, marking multiple test points on each of the vertical profiles indicates:
[0061] S1.2.1 Mark multiple test points on each vertical profile at a first preset interval.
[0062] Specifically, the first spacing is 1-2m.
[0063] Specifically, in step S2, the coordinates of each of the points to be measured are generally measured using any of the existing measuring instruments such as RTK.
[0064] It should be noted that RTK stands for Real-time kinematic, a carrier phase differential technique that uses real-time processing of carrier phase observations from two measurement stations. The carrier phase data acquired by the base station is sent to the user receiver for differential calculation of coordinates. This is a new and commonly used satellite positioning measurement method, and RTK can provide centimeter-level positioning accuracy in real-time in the field.
[0065] Furthermore, the step of using the penetrating nail to penetrate each of the test points with the same kinetic energy to obtain the penetration value of each test point includes the following steps:
[0066] S3.1. At each of the test points, the plumb bob surface to be tested is obtained;
[0067] Specifically, the surface of the plumb bob is obtained by taking the point to be tested as the center and arranging it with a radius of 5cm.
[0068] S3.2. Using the penetration nail, each of the tested plumb bob surfaces is vertically penetrated multiple times with the same kinetic energy and a second preset spacing, and a penetration value group is obtained for each of the tested plumb bob surfaces.
[0069] It should be noted that the penetration value refers to the depth to which the penetration pin penetrates.
[0070] It should be noted that any existing device can be used to energize the penetrating nail. For example, any existing energizing device that accumulates elastic potential energy through a spring and then converts the elastic potential energy into kinetic energy can be used. Alternatively, any existing magnetic energizing device can be used. Or, any existing hammer with a fixed striking force can be used to vertically strike the tail end of the penetrating nail. As long as a fixed kinetic energy can be imparted to the penetrating nail so that it moves along the axial direction, it is acceptable.
[0071] It should be noted that a scale line can be set along the axial direction on the penetration pin to determine the penetration depth; alternatively, any measuring tool in the prior art can be used to measure the length of the portion of the penetration pin outside the plumb line to be measured, and then the penetration depth can be calculated.
[0072] S3.3 Calculate the average value of each of the penetration value groups to obtain the penetration value of each of the test points.
[0073] It should be noted that the penetration value group includes multiple independent penetration values, and the average value refers to the arithmetic mean of multiple penetration values within the penetration value group.
[0074] Specifically, the second spacing is 5cm.
[0075] It should be noted that the geological classification of the soil to be tested based on soil strength to obtain multiple engineering geological categories of the soil to be tested refers to: conducting a geological survey of the soil to be tested, including information such as soil type, particle size composition and proportion, density, and water content, to preliminarily and macroscopically characterize the mechanical strength of the soil to be tested, and then geologically classifying it according to the different mechanical strengths to obtain multiple engineering geological categories.
[0076] Furthermore, the step of calculating the classification interval value based on the penetration value statistics table and the soil strength table includes the following steps:
[0077] S5.1. According to the penetration value statistics table, obtain the maximum and minimum penetration values, calculate the absolute value of the difference between the maximum and minimum values, and obtain the penetration difference.
[0078] S5.2. Based on the soil strength table, obtain the number of all engineering geological categories.
[0079] S5.3 Calculate the ratio of the penetration difference to the number of classes to obtain the classification interval value.
[0080] Furthermore, the step of dividing the data interval formed by all the penetration values equally according to the classification interval value to obtain multiple penetration intervals includes the following steps:
[0081] S5.1. According to the penetration value statistics table, obtain the maximum and minimum values of the penetration value;
[0082] S5.4. Divide the closed interval formed by the maximum value and the minimum value into multiple penetration intervals, and the absolute value of the difference between the maximum value and the minimum value of each penetration interval is the classification interval value.
[0083] Further, converting the penetration values in the penetration value statistics table into the corresponding engineering geological category includes the following steps:
[0084] S6.1. Compare the penetration value of each of the test points with the numerical range of all the penetration intervals to confirm the penetration interval corresponding to the penetration value.
[0085] S6.2 Confirm the engineering geological category corresponding to the penetration section;
[0086] S6.3 Replace the penetration value with the corresponding engineering geological category.
[0087] Preferably, the method further includes the following steps:
[0088] S6.4 Determine the geological conditions of the test point. If the geological conditions are complex, reduce the corresponding engineering geological category in the engineering geological classification table of the soil at the test point by one level to correct the engineering geological classification table of the soil at the test point.
[0089] It should be noted that the aforementioned complex geological conditions refer to various deteriorating conditions in this field, such as the development of groundwater.
[0090] Furthermore, the step of classifying and characterizing the soil to be tested according to the engineering geological classification table of the soil at the test point on the numbered topographic map includes the following steps:
[0091] S7.1 Mark the engineering geological category corresponding to each test point in the engineering geological classification table on the numbered topographic map to form multiple blocks with the same engineering geological category;
[0092] S7.2 Draw the boundary of each block on the numbered topographic map to classify and characterize the soil to be tested in an engineering geological manner.
[0093] Specifically, when drawing the boundary, it is drawn from the center of the numbered topographic map outwards.
[0094] Preferably, in step S7.3, when the number of test points included in any block is less than a preset value, the engineering geological category corresponding to the block is reduced by one level.
[0095] It should be noted that the preset value can be determined according to the actual number of test points selected. When the total number of test points is large, the preset value is increased accordingly, and vice versa. For example, if the total number of test points is 20, the preset value can be set to 2. In other embodiments, it can be determined according to the implementer's requirements for classification accuracy. The higher the accuracy requirement, the smaller the preset value needs to be set.
[0096] Example
[0097] This embodiment provides a method for classifying soil in engineering geology, including the following steps:
[0098] A. Mark multiple test points on the soil to be tested.
[0099] Specifically, engineering geological mapping is performed on the soil to be measured to obtain multiple vertical profiles. Multiple test points are sprayed and marked on each vertical profile at intervals of 1-2m, and a number is recorded next to each test point. The coordinates of each test point are measured by RTK, and the coordinates of each test point are marked on the topographic map to obtain a numbered topographic map.
[0100] B. Select a type of penetration nail and use the penetration nail to penetrate each test point with the same kinetic energy to obtain the penetration value of each test point and generate a penetration value statistics table, as shown in Table 1.
[0101] Specifically, the plumb bob surface to be tested is obtained by arranging the center of the test point with a radius of 5cm. The penetrating nail is used to penetrate each plumb bob surface vertically multiple times with the same kinetic energy and a spacing of 5cm. The number of penetrations for each plumb bob surface is 3. A set of penetration values is obtained for each plumb bob surface. The arithmetic mean of each set of penetration values is calculated to obtain the penetration value of each test point and generate a penetration value statistics table.
[0102] Table 1. Penetration Value Statistics
[0103] Test point Penetration value (mm) sy1 45 sy2 52 sy3 35 sy4 39 sy5 41 sy6 36 sy7 12 sy8 18 sy9 16 sy10 62 sy11 65 … …
[0104] C. Conduct a geological survey of the soil to be tested, including information such as soil type, particle size composition and proportion, density, and water content. Perform a preliminary, macroscopic characterization of the mechanical strength of the soil to be tested. Based on the different mechanical strengths, classify the soil into multiple engineering geological categories to obtain multiple (usually 5) engineering geological categories for the soil to be tested, and generate a soil strength table, as shown in Table 2.
[0105] Table 2 Soil Strength Status
[0106]
[0107]
[0108] D. Based on the penetration value statistics table (Table 1) and the soil strength table (Table 2), the classification interval values are calculated. The data intervals formed by dividing all penetration values equally according to the classification interval values are used to obtain multiple penetration intervals. A soil engineering geological classification system table based on penetration values is generated, as shown in Table 3.
[0109] Specifically, according to the penetration value statistics table (Table 1), the maximum and minimum penetration values are obtained. In this embodiment, the maximum value is 70 and the minimum value is 10 (not all values are shown in the table). The absolute value of the difference between the maximum and minimum values is calculated to obtain the penetration difference, i.e., 70-10=60. According to the soil strength table (Table 2), the number of all engineering geological categories is obtained. In this embodiment, there are a total of 5 categories, so the number of categories is 5. The ratio of the penetration difference to the number of categories is calculated to obtain the classification interval value, i.e., 60 / 5=12. The classification interval value = 12. The closed interval [10,70] formed by the maximum and minimum values is divided into multiple penetration intervals. The absolute value of the difference between the maximum and minimum values in each penetration interval is the classification interval value, i.e., the five penetration intervals [10,22], (22,34], (34,46], (46,58], and (58,70].
[0110] Table 3. Soil Engineering Geological Classification System Based on Penetration Value
[0111] Engineering Geology Category Penetration range (mm) Mechanical strength condition Ⅴ 10≤x≤22 Very bad Ⅳ 22＜x≤34 Difference Ⅲ 34＜x≤46 generally Ⅱ 46＜x≤58 good Ⅰ 58＜x≤70 very good
[0112] E. According to the soil engineering geological classification system table based on penetration value (Table 3), the penetration values in the penetration value statistics table (Table 1) are converted into the corresponding engineering geological categories to obtain the soil engineering geological classification table of the test points, as shown in Table 4.
[0113] Specifically, the penetration value of each test point is compared with the numerical range of all penetration intervals to confirm the penetration interval corresponding to the penetration value, then the engineering geological category corresponding to the penetration interval is confirmed, and then the penetration value is replaced with the corresponding engineering geological category.
[0114] Table 4. Engineering Geological Classification of Soil at Test Points
[0115]
[0116]
[0117] F. Determine the geological conditions of the test site. If the geological conditions are complex, reduce the corresponding engineering geological category in the engineering geological classification table of the soil at the test site by one level to correct the engineering geological classification table of the soil at the test site. The corrected table is shown in Table 5.
[0118] Table 5. Engineering Geological Classification of Soil at Test Sites (Revised)
[0119] Test point Engineering Geology Category (Revised) sy1 Ⅲ sy2 Ⅱ sy3 Ⅲ sy4 Ⅲ sy5 Ⅳ sy6 Ⅳ sy7 Ⅴ sy8 Ⅴ sy9 Ⅴ sy10 Ⅰ sy11 Ⅰ … …
[0120] G. Based on the engineering geological classification table of the soil at the test point, classify and characterize the soil at the test point on the numbered topographic map.
[0121] Specifically, the engineering geological category corresponding to each test point in the engineering geological classification table is marked on the numbered topographic map to form multiple blocks with the same engineering geological category. The boundary of each block is drawn from the center outward on the numbered topographic map to perform engineering geological classification and characterization of the soil to be tested.
[0122] H. More preferably, when the number of test points included in any block is less than a preset value, the engineering geological category corresponding to the block is reduced by one level. In this embodiment, the preset value is set to 3, that is, when the number of test points included in a block is less than 3, the engineering geological category of the block is reduced by one level to generalize to a lower level block. Other embodiments can adaptively set the required preset value according to the actual accuracy requirements.
[0123] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. A method for classifying soil in engineering geology, characterized in that, Includes the following steps: Mark multiple test points on the soil to be tested; Measure the coordinates of each of the points to be measured, and mark the coordinates of each of the points to be measured on the topographic map to obtain a numbered topographic map; A penetration pin is obtained, and each of the test points is penetrated with the same kinetic energy using the penetration pin to obtain the penetration depth of the penetration pin at each test point, i.e. the penetration value, and a penetration value statistics table is generated. Based on the soil strength, the soil to be tested is geologically classified to obtain multiple engineering geological categories of the soil to be tested, and a soil strength table is generated. Based on the penetration value statistics table and the soil strength table, the classification interval value is calculated. The data interval formed by all the penetration values is divided equally according to the classification interval value to obtain multiple penetration intervals, and a soil engineering geological classification system table based on penetration value is generated. According to the soil engineering geological classification system table based on penetration value, the penetration value in the penetration value statistics table is converted into the corresponding engineering geological category to obtain the soil engineering geological classification table of the test point; Based on the engineering geological classification table of the soil at the test site, the soil to be tested is classified and characterized by engineering geological classification on the numbered topographic map. The step of calculating the classification interval value based on the penetration value statistics table and the soil strength table includes the following steps: According to the penetration value statistics table, the maximum and minimum penetration values are obtained, and the difference between the maximum and minimum values is calculated to obtain the penetration difference; Based on the soil strength table, the total number of all engineering geological categories is obtained; Calculate the ratio of the penetration difference to the number of classes to obtain the classification interval value; The step of dividing the data interval formed by all the penetration values equally according to the classification interval value to obtain multiple penetration intervals includes the following steps: According to the penetration value statistics table, the maximum and minimum penetration values are obtained; The closed interval formed by the maximum value and the minimum value is divided into multiple penetration intervals, and the difference between the maximum value and the minimum value of each penetration interval is the classification interval value.
2. The soil engineering geological classification method according to claim 1, characterized in that, The step of classifying and characterizing the soil to be tested according to the engineering geological classification table of the soil at the test site on the numbered topographic map includes the following steps: The engineering geological category corresponding to each test point in the engineering geological classification table is marked on the numbered topographic map to form multiple blocks with the same engineering geological category. The boundaries of each block are drawn on the numbered topographic map to classify and characterize the soil to be tested for engineering geology.
3. The soil engineering geological classification method according to claim 2, characterized in that, When drawing the boundary, it is drawn from the center of the numbered topographic map outwards.
4. The soil engineering geological classification method according to claim 2, characterized in that, When the number of test points included in any block is less than a preset value, the engineering geological category corresponding to the block is reduced by one level.
5. The method for classifying soil engineering geology according to claim 1, characterized in that, The process of using the penetrating nail to penetrate each of the test points with the same kinetic energy to obtain the penetration value of each test point includes the following steps: The surface of the plumb bob to be tested is obtained by tidying up at each of the test points; The penetration nail is used to penetrate each of the tested plumb surfaces multiple times with the same kinetic energy and a second preset interval, and a set of penetration values is obtained for each of the tested plumb surfaces. Calculate the average value of each of the penetration value groups to obtain the penetration value of each of the test points.
6. The method for classifying soil engineering geology according to claim 1, characterized in that, Marking multiple test points on the soil to be tested includes the following steps: Engineering geological mapping was performed on the soil to be tested, and multiple vertical profiles were obtained; On each of the vertical sections, multiple test points are marked at a first preset interval.
7. The method for classifying soil engineering geology according to claim 1, characterized in that, The step of converting the penetration value in the penetration value statistics table into the corresponding engineering geological category includes the following steps: The penetration value of each test point is compared with the numerical range of all penetration intervals to confirm the penetration interval corresponding to the penetration value. Confirm the engineering geological category corresponding to the penetration section; Replace the penetration value with the corresponding engineering geological category.
8. The method for classifying soil engineering geology according to claim 1, characterized in that, It also includes the following steps: Determine the geological conditions of the test site. If the geological conditions are complex, lower the corresponding engineering geological category in the engineering geological classification table of the soil at the test site by one level to revise the engineering geological classification table of the soil at the test site.