关键词: Voronoi图, Delaunay三角形, 不均匀土层, 桩筏基础, 勘察孔, 土层资料

Abstract:

For the traditional pile-raft analysis method, the vertical inhomogeneous soil is calculated through layering the soil; but soil’s inhomogeneity in horizon can’t be considered. An improvement analysis method is presented. After calculating multi survey pores’ Voronoi diagram in horizontal plane, the survey pore’s soil data have been applied to the nearest soil element based on the Voronoi diagram characteristic of the nearest influence domain; and the pile-raft foundation in the horizontal inhomogeneous soil is analyzed. Applying the Bowyer-Watson algorithm to the Delaunay triangle and indirect method Voronoi diagram, the pile-raft analysis program is developed by the C++ program language. Through a pile-raft foundation calculation model, it is contrasted and generalized, that is between the single-pore survey data and multi-pore survey data’s calculating result. It is much difference to the two analysis result, which are foundation settlement, pile force distribution, raft moment and so on. So the Voronoi diagram method for analyzing pile-raft foundation should be taken into calculation for the greatly inhomogeneous soil, applying the entire survey pore’s soil data.

Key words: Voronoi diagram, Delaunay triangle, inhomogeneous soil, pile-raft foundation, survey pore, soil data