CN114266869A - Boundary representation method-based refined three-dimensional geological modeling method - Google Patents
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Abstract
The invention provides a boundary representation method-based refined three-dimensional geological modeling method, which comprises the following steps: s1: the method comprises the steps of generalizing and processing multi-source data, and creating a point model of a stratum; s2: creating a line model and establishing geological modeling constraint; s3: creating a ring model and acquiring a pinch-out range of the stratum; s4: fitting and generating a geological interface, and creating a surface model; s5: and (4) enclosing the body by the geological interface and performing attribute assignment to complete the creation of the three-dimensional geological information model. According to the boundary representation method-based refined three-dimensional geological modeling method, data processing, manual intervention, interpolation calculation, a surface algorithm and the like are integrated into each level, the model expression of each level is ensured to be error-free, then the next level is established, and finally the establishment of the whole three-dimensional geological information model is realized; the problems of inaccurate geological information expression, insufficient expert experience integration, difficult model modification and poor model graphic effect in the three-dimensional geological information model are solved.
Description
Technical Field
The invention relates to the technical field of three-dimensional geological modeling, in particular to a refined three-dimensional geological modeling method based on a boundary representation method.
Background
Along with the popularization and application of the Building Information Model (BIM) technology in the field of civil engineering, the application of the BIM technology in the field of engineering geology is gradually deepened, and the concept of the three-dimensional geological information model is proposed. In the recent City Information Model (CIM) technology, a city three-dimensional geological model is an important component of the city information model and is an effective means for realizing underground space multi-element information fusion visualization and reasonable utilization of city underground space resources.
The three-dimensional geological information model comprises geological geometric information, topological information and attribute information, the information is from surveying and mapping, exploration, field or indoor tests and the like, and has the characteristics of discreteness, multiple solutions and complexity, so that the stratum cannot be created in a dragging and placing family mode. In three-dimensional geological BIM applications, the most important and difficult task is to create a reasonable, accurate three-dimensional geological model.
At present, some three-dimensional geological model establishing method researches exist, such as a triangular prism model, a curved surface representation model and the like, and the establishment and the application of the three-dimensional geological model are preliminarily realized. However, the three-dimensional geological model obtained by the current method has many problems in terms of expression of unfavorable geology, geological structure and reliability and accuracy of the geological model, so that the application of the three-dimensional geological model stays in the primary stage of visualization, and the application of the BIM technology in the field of geotechnical investigation is restricted. Therefore, a method for creating an attractive, accurate and reliable three-dimensional geological information model is very important.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a refined three-dimensional geological modeling method based on a boundary representation method, which is characterized in that data processing, manual intervention, interpolation calculation, a surface algorithm and the like are integrated into each level according to the geometric thinking of points, lines, rings, surfaces and bodies, and after the model expression of each level is ensured to be error-free, the establishment of the next level is carried out, and the establishment of the whole three-dimensional geological information model is finally realized; the problems of inaccurate geological information expression, insufficient expert experience integration, difficult model modification and poor model graphic effect in the three-dimensional geological information model are solved.
In order to achieve the purpose, the invention provides a boundary representation-based refined three-dimensional geological modeling method, which comprises the following steps:
s1: the method comprises the steps of generalizing and processing multi-source data, and creating a point model of a stratum;
s2: creating a line model and establishing geological modeling constraint;
s3: creating a ring model and acquiring a pinch-out range of the stratum;
s4: fitting and generating a geological interface, and creating a surface model;
s5: and (4) enclosing the body by the geological interface and performing attribute assignment to complete the creation of the three-dimensional geological information model.
Preferably, the step of S1 further comprises the steps of:
s11: carrying out data generalization processing on the multi-source data;
s12: creating the point model of the formation in the form of model points;
s13: and auditing and modifying the point model.
Preferably, the step of S2 further comprises the steps of:
s21: creating the line model in the form of model line according to engineering data; the line model comprises a boundary line, a fault intersection line and an engineering interface line;
s22: the line model is labeled and classified.
Preferably, the step of S3 further comprises the steps of:
s31: sequentially and respectively connecting the boundary line, the fault intersection line and the engineering interface line to respectively obtain a boundary closed ring, a fault closed ring and an engineering interface closed ring;
s32: sequentially carrying out primary fitting on an upper interface and a lower interface of the stratum;
s33: performing surface intersection calculation on the stratum to obtain the pinch-out range of each stratum;
s34: adjusting the pinch-out range of the formation empirically; the pinch-out range forms a pinch-out confinement ring; the ring model comprises the boundary closed ring, the fault closed ring, the engineering interface closed ring and the pinch-out confinement ring.
Preferably, the step of S4 further comprises the steps of:
s41: performing virtual point encryption in the determined pinch-out constraint ring;
s42: fitting the upper boundary and the lower boundary of the formation by an interpolation method;
s43: and generating fault planes and engineering interfaces in other ring models except the pinch-out constraint ring.
Preferably, the step of S5 further comprises the steps of:
s51: confirming the topological relation between the upper interface and the lower interface of each stratum according to the formation mechanism of each stratum, and cutting the upper interface and the lower interface of each stratum;
s52: sequentially carrying out curved surface surrounding on each stratum, and carrying out curved surface stitching at the position where the curved surface of the stratum in the modeling range is lost to generate a geologic body;
s53: and performing attribute hooking on the geologic body to complete the creation of the three-dimensional geological information model.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. according to the method, generalization and fusion processing of multi-source data are considered, so that geological information with different levels, different sources and different precisions can participate in the expression of the three-dimensional geological information model, and the accuracy and the rationality of the model are improved. The source of the point data is rich, so that effective complementation can be formed, and the defect of dispersion of exploration data is overcome; secondly, after the point model is established, the point model can be edited and modified, and after the online constraint and ring model is established according to an algorithm, the online constraint and ring model can be modified according to the experience of an engineer, so that the range and the topology of the stratum are more in line with the reality.
2. The invention adopts a boundary representation model of point, line, ring, surface and body five-level structure hierarchy for establishing a three-dimensional geological model, is convenient for outlining unfavorable geological bodies such as a lens body, an ancient river channel, a light and dark creek, a pincushion, an interlayer, a fault and the like, and adjusts the structural form and the sequence of the point, the line, the ring and the surface by an engineer, thereby expressing the generation mechanism and the sequence of the unfavorable geological bodies and solving the complexity problem of geological phenomena.
3. The invention considers the important function of engineer experience on the three-dimensional geological model creation in five levels of points, lines, rings, surfaces and bodies, adjusts unreasonable places in the three-dimensional geological expression by corresponding manual interaction means, and solves the problem of multiple solutions of geological phenomena. The dispersion of geological data causes the expression of a geological body to have no fixed solution, the experience of an engineer is very important at this time, and the engineer can carry out a series of adjustments on the model in the data processing and model creating processes to ensure that the created geological model is a reasonable understanding of price comparison and reality.
4. The invention adopts a boundary representation method and a method for adding virtual point interpolation, so that the model is processed smoothly and has clear layers, the geological structure is reflected correctly, and the visualization effect is good. The geological model created by the method has the feeling of seamless connection, smooth ground surface transition, clear perspective and integration.
Drawings
Fig. 1 is a schematic flow chart of a boundary representation-based method for refining three-dimensional geological modeling according to an embodiment of the present invention.
Detailed Description
The following description of the preferred embodiment of the present invention, with reference to the accompanying drawings and fig. 1, will provide a better understanding of the function and features of the invention.
Referring to fig. 1, a method for refining three-dimensional geological modeling based on a boundary representation according to an embodiment of the present invention includes:
s1: the method comprises the steps of generalizing and processing multi-source data, and creating a point model of a stratum;
the data sources of the three-dimensional geological information model are various, and the three-dimensional geological information model comprises literature data of relevant departments, field investigation, field in-situ test, indoor geotechnical test, engineering surveying and mapping, aerial remote sensing, geophysical exploration and the like. The data have differences in emphasis, form, precision and the like, and interference and errors need to be eliminated, so that redundant information is reduced.
The step of S1 further includes the steps of:
s11: carrying out data generalization processing on multi-source data;
s12: creating a point model of the formation in the form of model points;
s13: and auditing and modifying the point model.
S2: creating a line model and establishing geological modeling constraint;
the step of S2 further includes the steps of:
s21: creating a line model in the form of a model line according to the engineering data; the line model comprises a boundary line, a fault intersection line and an engineering interface line;
s22: the line models are labeled and classified.
S3: creating a ring model and acquiring a pinch-out range of the stratum;
the step of S3 further includes the steps of:
s31: sequentially and respectively connecting the boundary line, the fault intersection line and the engineering interface line to respectively obtain a boundary closed ring, a fault closed ring and an engineering interface closed ring;
s32: sequentially carrying out primary fitting on an upper interface and a lower interface of the stratum;
s33: performing curved surface intersection calculation on the stratum to obtain the pinch-out range of each stratum;
s34: adjusting the pinch-out range of the stratum according to experience; the pinch-out range forms a pinch-out confinement ring; the ring model comprises a boundary closed ring, a fault closed ring, an engineering interface closed ring and a pinch-out constraint ring.
S4: fitting and generating a geological interface, and creating a surface model;
the step of S4 further includes the steps of:
s41: carrying out virtual point encryption in the determined pinch-out constraint ring;
s42: fitting an upper interface and a lower interface of the stratum by an interpolation method;
s43: and generating fault planes and engineering interfaces in other ring models except for pinch-out constraint rings.
S5: and (4) enclosing the body by the geological interface and performing attribute assignment to complete the creation of the three-dimensional geological information model.
The step of S5 further includes the steps of:
s51: confirming the topological relation between the upper interface and the lower interface of each stratum according to the generation mechanism of the stratum, and cutting the upper interface and the lower interface of each stratum;
s52: sequentially carrying out curved surface surrounding on each stratum, and carrying out curved surface stitching at the position where the curved surface of the stratum within the modeling range is lost to generate a geologic body;
s53: and (5) performing attribute hooking on the geologic body to complete the creation of the three-dimensional geological information model.
For example:
(1) point-multi-source data generalization and processing: the main data of the project is derived from the drilling data, the drilling data is generalized into point data, and the main attributes comprise coordinates, numbers, labels, upper strata where the points are located, lower strata where the points are located, data sources, weights of the points and the like. Geological information from other sources can be processed in the same way, such as profile data, geophysical data, etc. And (4) establishing a stratum point model in a model point mode, and auditing and modifying the point model.
(2) Line-establishing geological modeling constraints: and establishing a modeling boundary line in the form of a model line according to the engineering data.
(3) Ring-acquire formation pinch-out range: and preliminarily fitting the upper and lower interfaces of the stratum, and then carrying out curved surface intersection calculation so as to obtain the pinch-out range of each stratum. And adjusting the formation pinch-out range according to the experience of an engineer.
(4) Face-geological interface fitting and generation: and carrying out virtual point encryption in the determined pinch-out constraint ring, and fitting the upper and lower interfaces of the stratum by an interpolation method.
(5) Body-geological interface bounding volume and attribute assignment: and carrying out surface surrounding on the geologic body, and suturing the surface of the geologic body along the stratum modeling range to generate the geologic body. And sequentially generating each stratum according to the deposition sequence of the stratum. And (5) performing attribute hooking on the geologic body to complete the creation of the three-dimensional geological information model.
The invention realizes a refined three-dimensional geological modeling method fusing multi-source data based on a boundary representation method, integrates expert experience and manual interaction into each step of points, lines, rings, surfaces and bodies, solves the problems of complexity and multiple solutions of geological phenomena, can create an attractive, accurate and reliable three-dimensional geological information model, and is beneficial to further analysis, calculation and expansion application of the three-dimensional geological model.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
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Cited By (4)
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| CN114792361A (en) * | 2022-05-12 | 2022-07-26 | 重庆市勘测院((重庆市地图编制中心)) | Method and device for three-dimensional underground space visualization, computer and storage medium |
| CN115329407A (en) * | 2022-08-10 | 2022-11-11 | 煤炭科学研究总院有限公司 | Data organization and integration method of coal mine geological objects based on logical point association |
| CN116049965A (en) * | 2023-02-27 | 2023-05-02 | 中水北方勘测设计研究有限责任公司 | Method for creating three-dimensional geological interface based on multi-source data and readable storage medium |
| CN118298123A (en) * | 2024-06-04 | 2024-07-05 | 中国科学院地质与地球物理研究所 | Large-scale data coupling three-dimensional geological fine modeling method and system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114792361A (en) * | 2022-05-12 | 2022-07-26 | 重庆市勘测院((重庆市地图编制中心)) | Method and device for three-dimensional underground space visualization, computer and storage medium |
| CN115329407A (en) * | 2022-08-10 | 2022-11-11 | 煤炭科学研究总院有限公司 | Data organization and integration method of coal mine geological objects based on logical point association |
| CN116049965A (en) * | 2023-02-27 | 2023-05-02 | 中水北方勘测设计研究有限责任公司 | Method for creating three-dimensional geological interface based on multi-source data and readable storage medium |
| CN118298123A (en) * | 2024-06-04 | 2024-07-05 | 中国科学院地质与地球物理研究所 | Large-scale data coupling three-dimensional geological fine modeling method and system |
| CN118298123B (en) * | 2024-06-04 | 2024-09-13 | 中国科学院地质与地球物理研究所 | Large-scale data coupling three-dimensional geological fine modeling method and system |
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