DYNAMIC MODELING OF TUNNEL SURVEY SPATIOTEMPORAL DATA

Abstract

Currently, for tunnels, the design centerline and design cross-section with time
stamps are used for dynamic three-dimensional (3D) modeling. However, this
approach cannot correctly reflect some qualities of tunneling or some special cases,
such as landslips. Therefore, a dynamic 3D model of a tunnel based on
spatiotemporal data from survey cross-sections is proposed in this paper. This
model can not only playback the excavation process but also reflect qualities of a
project typically missed. In this paper, a new conceptual model for dynamic 3D
modeling of tunneling survey data is introduced. Some specific solutions are
proposed using key corresponding technologies for coordinate transformation of cross-sections from linear engineering coordinates to global projection coordinates,
data structure of files and database, and dynamic 3D modeling. A 3D tunnel TIN
model was proposed using the optimized minimum direction angle algorithm. The
last section implements the construction of a survey data collection, acquisition, and
dynamic simulation system, which verifies the feasibility and practicality of this
modeling method.