| Hydropower project is a huge project, when it is implemented, a series of engineering geology decision from the macro to the micro should be make. Use a variety of engineering survey data to establish a three-dimensional geological model, so as to describe the spatial characteristics of the complex geological structure and geological bodies intuitively. The ideal work way of geological engineers is realizing engineering geological problems analysis, engineering geological evaluation and hydropower engineering design in the three-dimensional environment.The current three-dimensional geological modeling of hydropower project only concern with the project scale geological structure of the distribution and relationships, ignoring the display of geological information from regional scale to outcrop scale. As a result the geological model can not meet the different levels of demand for geological structure condition to subsequent professional (design, construction, management, etc.). On the other hand, Three dimensional geological model of hydropower project at present only can realize the digital display of tectonic stratigraphic framework, and only support to a qualitative analysis of the geological structure for the professional staff of geology, ignoring the professional geological analysis model. This situation leads to the efforts-consuming 3D geological model only can limited to the geological survey professional, Can’t be applied to hydropower engineering design, construction, manage-ment and other professional fields, all this lead to the result that the utilization efficiency is low and the actual value is limited.Aiming at the above problems, this paper studied the principle and method of multi-scale three-dimensional geological modeling, and explored the visual expression of spatial characteristics of geological bodies and relationship between geological structure of different scale, moreover the way of realization for geological information integration at different levels is explored. On this basis, we explore the coupling method of the three-dimensional geological model and professional geological analysis model, to meet the engineering design, construction and management professionals of hydropower, requires multiple applications and to develop comprehensive analysis based on 3D geological model。The practice shows that this multi-scale geological model is good for the collaborative of engineering investigation, design, construction and management professional in hydropower. So the work efficiency can be improved significantly. What’s more the low rate of utilization and weak analysis ability of 3D geological model may be changed. And the application of research on principle and method of 3D geological modeling in Hydropower Engineering can be promoted.The main research achievements of this thesis are summarized as follows:(1) We first analyzed the epistemology meaning of the scale and the methodological value of multi-scale research, And expounded the geological spatial cognitive model, multi-scale geological object classification and multi-scale geological information concept from the perspective of geological spatial cognition. Then we gave the meaning of multi-scale geological structure modeling in hydroelectric engineering. On this basis, we divided the 3D geological modeling in hydropower project into regional scale, project scale and outcrop scale. The geological object in each scale and its characteristics were concluded.(2) Then, We design a hybrid data structure suitable for hydropower engineering multi-scale three-dimensional geological modeling on the analysis of characteristics of various data structure model. The organization of main geometric element was also designed. This hybrid data structure model based on B-Rep model, with TIN model and the wire frame model. In 3D geological modeling, B-Rep model is used for constructing topology relation of geological body surface and the organization of geological curved surface description of complex, TIN model is used for the fine structure surface and complex geological body, wire frame for constructing shape relative rules of hydraulic structure model.(3)We proposed and proved the method system and implementation framework of Multi-scale 3D geological modeling in hydropower project. The specific method contains the regional-scale 3D geological modeling method based on the series profile which made from regional geological map, the engineering-scale 3D modeling method based on interactive mode of engineering exploration profile and man-machine, the simulation of outcrop-scale rock structural plane three-dimensional network by Monte-Carlo method. In the regional-scale geological modeling part, we discussed the algorithm of automatic generation of standard planar geological map data model establishment method and the cutting section. According to geological modeling at project-scale, we discussed the modeling method of topography, stratum type object, stratigraphic surfaces, special geological object (folds, faults, lens) and the of artificial structures. Aiming at the outcrop-scale geological modeling, we discussed the key technique to determine the structure of simulation and 3D network structure of surface parameters such as the realization method. On this basis, we discussed the integration of multi-scale 3D geological model, which laid a foundation for multiple applications and to develop comprehensive analysis based on 3D geological model.(4) We divided the geological analysis method based on the three-dimensional geological model into two categories:the basic analysis and professional analysis. In basic analysis part, we made the principle and method of process research of standard section analysis of exploration profile map making, dig the moment analysis and the analysis of measurement, design of the concrete realization algorithm. Analysis for the professional geological, studied the code coupling, coupling and DDE files or OLE coupling method and coupling method, then the kind of coupling modes was determined. Then we took the coupling of three-dimensional geological model and FLAC3D as example. Then we discussed the transformation method from 3D geological model to computing grid model, realized the numerical simulation based on 3D geological model. This kind of transformation provides a new way for the comprehensive analysis based on 3D geological mode.(5) A series of functional modules was developed based on QuantyView. Such as hydropower project scale 3D geological modeling and analysis module,3D geological modeling functional development of regional scale, project scale and outcrop scale, the three-dimensional geological model based on the function of basic analysis, the transformation from 3D visual grid to computing grid. After all the functions of the integration and test, A 3D geological modeling and analysis of hydropower station as an example to verify. The results show that the method can achieve the multi-scale three-dimensional geological modeling of hydropower engineering, and 3D geological model based on the established, can carry on the comprehensive geological analysis.The main innovations of this thesis are: (1) We design a hybrid data model suitable for multi-scale 3D geological modeling inhydropower engineering. This hybrid data model based on B-Rep model with TIN model, and the wire frame model. Among them, B-Rep data model for geological curved surface fitting complex and organize their topological relations, TIN model is used to construct the fine surface and complex geological body, wire frame model used to construct the shape of the relative rules of hydraulic structures.(2) We put forward the method system of hydropower project scale of 3D geological modeling and Implementation Framework. The specific method contains the regional-scale 3D geological modeling method based on the series profile which made from regional geological map, the engineering-scale 3D modeling method based on interactive mode of engineering exploration profile and man-machine, the simulation of outcrop-scale rock structural plane three-dimensional network by Monte-Carlo method. The coupling model of three-dimensional geological model and professional geological was discussed, so as to carry out a comprehensive analysis on 3D geological model.(3) Considering with the multi-level characteristics of analysis in hydropower engineering geological, We carried out the research of ways and methods based on three-dimensional geological model, Coupling geological modeling software files and professional geological analysis software based on data file. The initial realization of collaborative work between geological survey, hydraulic and electromechanical design profession was achieved. The reasonableness and accuracy of hydropower project three-dimensional design was improved. |
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