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Generalized triangular prism interpolation method for geotechnical parameter characterization
Abstract Three-dimensional (3D) geological modeling includes structure modeling and property modeling. Presently, numerous studies on 3D geological structure modeling theory and methodology exist; however, emphasis on 3D geological property modeling is lacking. Generalized triangular prism (GTP) models are a kind of spatial data model designed for building 3D geological structure models. In this study, we describe the characteristics of GTP models and its resolution form, summarize the relationship between interpolation times and control nodes, and define GTP volume coordinates. Coordinates are combined with the B-net method to design a B-spline interpolation method for GTP elements to express the spatial heterogeneity of geological properties. An example is given in which standard penetration test (SPT) $ N_{63.5} $ values for an area are modeled. Correlation distance is described and calculated for multiple stratigraphic layers. Based on the 3D geological structure model, the heterogeneity of the $ N_{63.5} $ value in each geological unit is simulated. The calculation method accounts for geotechnical parameters inherent to autocorrelation, adjusts the property values according to correlation distance, and solves problems caused by a spatial change in geotechnical parameters. Results of this study provide a new method for 3D geological property modeling, which can be also used to express other geological parameters.
Generalized triangular prism interpolation method for geotechnical parameter characterization
Abstract Three-dimensional (3D) geological modeling includes structure modeling and property modeling. Presently, numerous studies on 3D geological structure modeling theory and methodology exist; however, emphasis on 3D geological property modeling is lacking. Generalized triangular prism (GTP) models are a kind of spatial data model designed for building 3D geological structure models. In this study, we describe the characteristics of GTP models and its resolution form, summarize the relationship between interpolation times and control nodes, and define GTP volume coordinates. Coordinates are combined with the B-net method to design a B-spline interpolation method for GTP elements to express the spatial heterogeneity of geological properties. An example is given in which standard penetration test (SPT) $ N_{63.5} $ values for an area are modeled. Correlation distance is described and calculated for multiple stratigraphic layers. Based on the 3D geological structure model, the heterogeneity of the $ N_{63.5} $ value in each geological unit is simulated. The calculation method accounts for geotechnical parameters inherent to autocorrelation, adjusts the property values according to correlation distance, and solves problems caused by a spatial change in geotechnical parameters. Results of this study provide a new method for 3D geological property modeling, which can be also used to express other geological parameters.
Generalized triangular prism interpolation method for geotechnical parameter characterization
Liu, Huan (author) / Chen, Suozhong (author) / He, Liang (author) / Hou, Manqing (author) / Zhang, Junru (author)
2020
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
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