3D geologic modeling method based on T splines

Abstract

The invention discloses a 3D geologic modeling method based on T splines. The T splines serve as a spatial data structure of 3D geologic modeling, 3D modeling is carried out aimed at a complex form of a geologic object, and the complexity of geologic construction is described quantitatively. The method comprises the following steps that geologic data of multiple sources is integrated; the construction complexity of the geologic object is analyzed on the basis of the geologic data; geologic objects are divided into two types, and are modeled in a T spline based parameter curved-surface modeling method or a T spline based refined curved-surface modeling method respectively; and the 3D models of the geologic objects are integrated and examined, and a final 3D geologic model is obtained. The method of the invention can be used to establish real-form 3D models including geologic constructions as deposition, wrinkling, intrusion, non-integrated surfaces and tomography, and an accurate reliable initial model is provided for computer-assisted design and value simulation analysis as lithology prediction, seepage and grouting simulation and stability analysis.

Description

technical field [0001] The invention belongs to the field of three-dimensional visualized geological modeling, and relates to three-dimensional visualized modeling of complex geological structures, and specifically relates to a three-dimensional geological modeling method based on T-splines. Background technique [0002] Now 3D geological modeling technology is widely used in the field of geotechnical engineering, and plays an important role in the 3D visualization analysis and decision-making in the fields of foundation engineering, slope engineering and tunnel engineering. The practical application of 3D geological models in GIS, BIM, and CAD / CAE has continuously put forward higher requirements for their accuracy and reliability. However, the existing geological modeling methods still face the challenge of the complexity of geological structures. [0003] Geological structure complexity is an important branch of geological complexity that is concerned by engineering geolog...

AI Technical Summary

Problems solved by technology

The practical application of 3D geological models in GIS, BIM, and CAD/CAE has continuously put forward higher requirements for their accuracy and reliability. However, the existing geological modeling methods still face the challenge of the complexity of geological structures.

However, existing methods still have limitations in terms of complexity quantification, spatial data structures, and modeling techniques

In recent years, some scholars have studied the method of quantitatively measuring the complexity of geological parameters and geometric elements for geological evaluation, but the quantitative indicators of structural complexity that can be used as input parameters for geological modeling still need to be studied

The spatial data structure used in 3D geological modeling determines the underlying structure of the model and the corresponding modeling technology, but the data structure widely used in geological modeling, such as NURBS (Non-Uniform Rational B-spline), due to its mathematical principle The limitation of , usually does not have enough flexibility in describing the complexity of geological structures

Therefore, the NURBS modeling process usually requires NURBS surface clipping and splicing technology. This strategy is suitable for establishing regular geometric forms, but it faces many problems in the modeling of complex geological bodies: First, because the NURBS su

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