An evaluation method for earth-rock dam impervious earth material based on contour cloud picture

Abstract

The application discloses a kind of contour cloud-based earth-rock dam impervious soil evaluation method, to solve the problems of time-consuming and insufficient accuracy in determining useful soil distribution range and soil reserves in the prior art, comprising the following steps: obtaining the geometric characteristics and physical parameters of soil yard;Based on the geometric characteristics, a three-dimensional geological model of the soil yard is constructed;The soil property test sampling point coordinates and physical parameters are imported into the three-dimensional geological model to form a point set;Based on the point set attribute interpolation, the attribute values of all grid cells in the soil layer area are obtained;Based on the attribute values of the grid cells, an attribute contour cloud is generated;Filter the grid cells with attribute values meeting the engineering requirements and establish the corresponding area;Calculate the volume of the soil in the area with attribute values meeting the engineering requirements.The application visualizes the soil properties and distribution through three-dimensional software, facilitating statistical analysis of soil properties, and enables quick and accurate determination of the distribution range and reserves of useful soil in the soil yard.

Description

Technical Field

[0001] This invention relates to the field of geological exploration technology, and more specifically, to a method for evaluating seepage-proof soil materials for earth-rock dams based on contour cloud maps. Background Technology

[0002] Currently used plan and profile diagrams combined with parameter tables are insufficient to intuitively and accurately reflect the spatial zoning and stratification differences of soil properties, making it difficult to statistically analyze the soil properties of a specific area. This results in a rather general understanding and evaluation of soil properties in traditional soil yard exploration, making it difficult to accurately determine the detailed distribution of good and poor soil. In soil yards with complex physical properties, the soil layers revealed during mining often differ significantly from the initial exploration findings. Methods for calculating soil reserves, such as the average thickness method and the parallel section method, are labor-intensive, time-consuming, and have low accuracy. Therefore, there is an urgent need for an evaluation method that can accurately determine the distribution range of useful soil within a soil yard and its reserves. Summary of the Invention

[0003] This invention addresses the technical problems mentioned in the background section by providing a method for evaluating seepage-proof soil materials for earth-rock dams based on contour maps.

[0004] This invention is achieved through the following technical solution:

[0005] A method for evaluating seepage-proof soil materials for earth-rock dams based on contour maps includes the following steps:

[0006] Topographic mapping and exploration of the soil yard are conducted to obtain the geometric characteristics of the soil layers, and soil samples are tested to obtain the physical property parameters of the soil.

[0007] A three-dimensional geological model of the soil yard was constructed on the GOCAD software platform based on the aforementioned geometric features;

[0008] The coordinates of the soil physical property test sampling points and the corresponding physical property parameters are compiled into a text file, which is then imported into a three-dimensional geological model to form a point set. The coordinates of the sampling points determine the location of the point set, and the physical property parameters determine the attributes of the point set.

[0009] Based on the attribute values ​​of the sampling points, the attribute values ​​of all grid cells within the soil layer area are obtained by interpolation;

[0010] Based on the attribute values ​​of each grid cell, an attribute contour map is generated in the soil layer area, which can intuitively present the spatial differences in soil properties and the distribution of useful materials in the material yard. Engineers can use this to analyze and evaluate the material yard.

[0011] Within the soil layer area, select grid cells whose attribute values ​​meet the engineering requirements and establish the corresponding area;

[0012] The volume of soil in the area whose attribute values ​​meet the engineering requirements is calculated.

[0013] In some possible embodiments, the geometric characteristics of the soil layers in the soil yard include the surface topography of the soil yard, the thickness of the soil layers, and the distribution range of the soil layers.

[0014] In some possible embodiments, the physical properties include, but are not limited to, clay content, P5 content, and natural moisture content.

[0015] In some possible embodiments, the contour map includes, but is not limited to, clay content contour lines, P5 content contour lines, and natural moisture content contour lines.

[0016] In some possible implementations, when filtering attribute values, one or more attribute values ​​can be used as filtering criteria.

[0017] In some possible embodiments, constructing a three-dimensional geological model of the soil yard includes the following steps:

[0018] Import the topographic points of the earthwork site obtained from topographic mapping into GOCAD, generate a point set, and generate a topographic surface based on the point set.

[0019] Based on the borehole coordinates and depth, generate boreholes in the model and set bottom interface markers at the corresponding locations on the bottom interface of the soil layer.

[0020] A plane is generated below the terrain surface, and this plane is fitted to the borehole bottom interface marker to generate the soil bottom interface surface.

[0021] A three-dimensional volume (Voxet) is created based on the extent of the soil and material site.

[0022] A soil "region" is created in a three-dimensional volume (Voxet) based on the topographic surface and the bottom interface of the soil layer.

[0023] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0024] This invention provides a method for evaluating soil materials for seepage prevention in earth-rock dams based on contour cloud maps. Based on geological surveys, exploration, and experimental results, it utilizes a 3D modeling software platform to assign soil material property parameters to a 3D geological model of the soil material site. The contour cloud maps of these parameters visually display the differences in soil properties at different locations within the site, facilitating statistical analysis of soil properties in various areas. This allows for a relatively quick and accurate determination of the reserves and distribution range of useful soil materials, making the soil properties and useful soil material reserves within the site visible. This is beneficial for the rational evaluation of candidate soil material sites, and subsequent soil extraction work can be carried out with refined extraction based on the distribution of useful soil materials, improving extraction efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the evaluation method for seepage prevention soil materials of earth-rock dams based on contour cloud maps, provided in an embodiment of the present invention. Detailed Implementation

[0027] 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.

[0028] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to practice the invention. In other embodiments, well-known structures, circuits, materials, or methods have not been specifically described in order to avoid obscuring the invention.

[0029] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] In the description of this invention, the terms "front," "rear," "left," "right," "up," "down," "vertical," "horizontal," "high," "low," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0031] like Figure 1As shown, in one embodiment of the method for evaluating the seepage-proof soil material of earth-rock dams based on contour maps provided by the present invention, the method includes the following steps:

[0032] S1. Obtain the geometric characteristics of the soil yard and the physical properties of the soil.

[0033] The geometric characteristics of a soil yard mainly include its surface topography, soil layer thickness, and distribution range. Topographic data of the soil yard can be obtained through topographic mapping. Columnar soil samples can be obtained by drilling at the soil yard to understand the soil layer thickness and distribution range. The soil samples can then be tested to obtain the soil physical property parameters.

[0034] The physical properties of the soil material mainly include, but are not limited to, the clay content, P5 content, and natural moisture content.

[0035] S2. Construct a three-dimensional geological model in the GOCAD software platform based on the geometric features of the soil and material site.

[0036] Specifically, it may include the following steps:

[0037] S21: Create a terrain surface.

[0038] The terrain data obtained from topographic surveying is imported into the model to form a point set, and the terrain surface is generated based on the point set.

[0039] S22: Hole generation.

[0040] Based on the borehole coordinates and depth, generate boreholes in the model and set bottom interface markers at the bottom interface of the soil layer.

[0041] S23: Establish the bottom interface of the soil layer.

[0042] A plane is generated below the topographic surface; this plane is fitted to the borehole markers representing the bottom interface of the soil layer to generate the bottom interface surface; the number of boreholes will directly affect the degree to which the surface shape closely approximates the actual bottom interface of the soil layer, and the model will be continuously improved as the engineering survey work continues to deepen.

[0043] S24: Create a three-dimensional volume (Voxet).

[0044] A three-dimensional volume (Voxet) is created based on the area of ​​the soil and material site. The size of the three-dimensional volume should be slightly larger than the area of ​​the soil and material site. The mesh density of the three-dimensional volume is determined according to the accuracy requirements of the site survey.

[0045] S25: Use the "Geological Features Based" function to create a "Region" to create a soil region in a three-dimensional volume (Voxet) between the topographic surface and the bottom interface of the soil layer.

[0046] S3. Compile the coordinates of the soil physical property test sampling points and the corresponding physical property parameters into a text file, and import it into the model to form a point set. The sampling point coordinates determine the spatial location of the point set, and the physical property parameters determine the attributes of the point set.

[0047] S4. Assign the attributes of the sampling point set to the adjacent 3D volume mesh, and further use the "Initialize Attributes (Multi-mesh)" function to interpolate to obtain the attribute values ​​of all meshes (including the soil layer area) in the 3D volume.

[0048] S5. Generate contour maps within the soil layer area based on the attribute values ​​of each grid.

[0049] Independent contour lines 1, 2, 3, etc., are established based on the attribute values ​​of each sampling point. Examples include contour lines for clay content, P5 content, and natural moisture content. These contour lines visually represent the spatial differences in soil properties and the distribution of usable materials within the material yard, allowing engineers to analyze and evaluate the material yard accordingly.

[0050] S6. Filter the 3D volumetric mesh and establish the corresponding region.

[0051] Within the soil layer region established in S25, grid cells with attribute values ​​meeting the requirements are selected, and these grids are used to establish a new region. When selecting attribute values, a single attribute value can be used as the selection criterion; for example, grids with a clay content attribute value greater than 14% meet the requirements. Alternatively, multiple attribute values ​​can be used as selection criteria; for example, grids with a clay content attribute value greater than 14% and a P5 content attribute value less than 30% meet the requirements. Of course, the selection criteria can be adjusted accordingly based on the actual geographical environment and engineering requirements.

[0052] S7. Obtain the required soil volume.

[0053] GOCAD automatically calculates and displays the volume of the area selected in S6, which is the amount of usable soil.

[0054] 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 evaluating seepage-proof soil materials for earth-rock dams based on contour maps, characterized in that, Includes the following steps: Obtain the surface topography, soil layer thickness, soil layer distribution range, clay content, P5 content, and natural moisture content of the soil yard. A three-dimensional geological model of the soil yard is constructed on the GOCAD software platform based on the surface topography, soil layer thickness, and soil layer distribution range of the soil yard. The coordinates of the soil physical property test sampling points and the corresponding physical property parameters are compiled into a text file, which is then imported into a three-dimensional geological model to form a point set. The sampling point coordinates correspond to the spatial location of the point set, and the physical property parameters correspond to the attributes of the point set. Based on the point set attributes, the attribute values ​​of all grid cells within the soil layer area are obtained by interpolation; Based on the attribute values ​​of the grid cells, an attribute contour map is generated in the soil layer area. The contour map includes clay content contour lines, P5 content contour lines, and natural moisture content contour lines. Within the soil layer area, grid cells whose attribute values ​​meet the engineering requirements are selected using a single attribute value or multiple attribute values ​​as screening criteria, and corresponding areas are established. The volume of soil within the area whose attribute values ​​meet the engineering requirements is calculated. The construction of a three-dimensional geological model of the soil includes the following steps: Generate terrain surfaces in GOCAD based on the surface topography of the soil yard; Generate boreholes in GOCAD based on borehole coordinates and depth, and set bottom interface markers at the corresponding positions on the bottom interface of the soil layer. Generate a plane below the terrain surface and fit the plane to the bottom interface mark to generate the soil bottom interface surface; Establish a three-dimensional volume based on the area of ​​the soil and material yard; Soil regions are established in a three-dimensional volume based on the terrain surface and the bottom interface surface of the soil layer.

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