真实感图形技术在润扬大桥北锚基坑建基面稳定性分析中的应用

锚锭基础抗滑稳定性是桥梁设计所要考虑的一个重要方面,而基坑建基面的起伏状况又直接影响着锚锭建基面基岩与混凝土胶结面的抗剪强度参数。因此,本文针对润扬大桥北锚基坑建基面起伏状况的分析,在DTM(digital terrain model)的基础上,选择MapInfo作为GIS的开发平台,利用真实感图形技术实现了北锚基坑建基面的三维可视化效果,并利用MapInfo强大的测量分析和信息统计功能对北锚基坑建基面的起伏状况进行了详细的分析,分析结果直接以图形形式显示,能够较为客观的反映整个基坑建基面的综合情况,便于政府决策部门和设计施工单位相关人员间的相互交流,为工程设计服务。

Application of Three Dimension Graphics Technique in Stability Analysis of the North Anchor Foundation Pit Base of Runyang Bridge

Stability against sliding of anchor foundation is a very important factor considered in bridge design. The topography of foundation pit base directly influences shear strength parameters between bedrock and concrete cemented plane. Analysis is performed about foundation pit base at the north anchor of Run-yang bridge in this paper. Based on DTM(digital terrain model), MapInfo is chosen as development flat-form of GIS and realize three-dimensional visualization of the north anchor foundation pit base by means of third dimension at graphics technique, and then a detailed analysis is conducted of its fluctuation situation by applying powerful function of measurement analysis and information statistics of GIS. The result of analysis can be shown by graphics mode, which can objectively reflect integrated situation of the whole foundation pit base and is convenient for the communication between decision makers and engineers.