深基坑监测数据三维可视化研究

3D-Visualization of deep pit monitoring information

基于GIS三维可视化技术,分别采用空间插值、空间拉伸和颜色渐变的方法实现深基坑监测数据的三维可视化。利用Matlab对监测点数据按照指数模型进行拟合得到坑外地表沉降的概化曲线,根据概化曲线扩充样本点,解决了监测数据样本点稀少的问题。采用改进的反距离加权插值方法,提出椭圆形的插值方法,有效改善了监测点在X轴和Y轴布设不均的问题,获得了较好的插值效果。研究结论提高了深基坑监测数据的三维可视化表现能力,具有较好的工程应用意义。

Based on GIS 3D-Visualization technique,the 3D-Visualization of deep foundation pit monitoring information can be realized using the spatial interpolation method,the space stretching method and the color gradient method respectively. Matlab is used to fit the monitoring data in accordance with the parabolic model to get the pit generalized curve of surface subsidence,the sample points extended according to the generalized curve,and the sparse sample points problem is solved. Meanwhile the inverse distance weighted interpolation search pattern is improved,the oval search method is put forward,the monitoring uneven layout in X and Y direction problem is effectively solved. What’s more,the interpolation effect is good. The study results improve the 3D-Visualization of deep foundation pit monitoring data,which provide a good significance for engineering applications.