Abstract: Basing on the “3D Engineering Investigation Information System”, a “3D Underground Construction Deformation Display System” is developed. Empirical methods were used to predict the deformation of strata and buildings in the system. 3D regular grid model and triangulated irregular network (TIN) model were used for the 3D deformation field visualization. For the TIN model, the adaptive TIN keep-geometry refinement algorithm were developed. This algorithm can depict the deformation field in higher resolution without remarkable data size increase. Therefore the modeling and analysis of very large areas become possible.

Key words: underground construction, ground subsidence, building deformation, empirical methods, 3D deformation field visualization

摘要： 基于“三维岩土工程勘察信息系统”开发了“地下工程施工引起地层位移和建筑物变形三维预测系统”。系统中采用经验法对地下工程施工引起的地层以及建筑物的变形进行预测, 采用三维规则格网模型以及不规则三角网模型来表达三维的变形场, 并采用自适应三角网加密算法对不规则三角网进行加密, 以满足在不增加数据量的前提条件下对变形场提供高精度的刻画, 从而满足了大范围区域建模分析的需求。

关键词: 地下工程施工, 地表沉降, 建筑物变形, 经验公式, 三维变形场可视化