Abstract
The display of three dimensional geological body can visually describe the complex subsurface geological structure, effectively improve the engineer's space imagination and intuitively understand the geological spatial relationship. Through analysis of commonly used three dimensional geological data model and considered the impact of faults. The paper establishes a generalized triangular prism (GTP) element model, and achieves a three dimensional geological modeling method based on GTP. The paper proposes the error correction technology based on virtual drilling, which allows designers combine their experience to appropriately amend the unknown region of stratum, it contributes to improve the accuracy of 3D geological model. Finally, the paper achieves a 3D geological drilling, borehole cross section, visual information query and geological visualization technology such as virtual drilling, cutting, layering display based on 3D spatial analysis techniques and graphics.
Highlights
The design and construction of railways, highways and urban rail transit are generally faced with more complex geological conditions
Combining with the spatial analysis capabilities of three dimensional model, the paper establishes an effective method for 3D visualized analysis of geological information
The three dimensional spatial information query is the basic function of 3D geological modeling and visualization, and it provides a powerful tool for spatial analysis
Summary
The design and construction of railways, highways and urban rail transit are generally faced with more complex geological conditions. The 3D geological model can accurately and completely expresses complex geological phenomena boundary conditions and geological structures, and can enhance the intuition and accuracy of geological analysis. These advantages let designers to make the engineering design and construction plan more in line with the actual distribution and variation of geological phenomena, and help to reduce project risks. Combining with the spatial analysis capabilities of three dimensional model, the paper establishes an effective method for 3D visualized analysis of geological information. This has an important significance to determine reasonable route design
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