3DGIS技术辅助城市轨道交通基坑工程施工方案论证

Scheme Demonstration of Urban Rail Transit Foundation Pit Project with 3DGIS Assistance

传统基坑工程施工方案论证是在二维平面图纸上进行的,论证会之前专家们需要做大量的前期工作,大型的工程施工方案论证会耗时较多,效率低下,建成后工程资料存档和查阅困难。为了解决这些难题,提出使用3DGIS(三维地理信息系统)技术来辅助基坑工程施工方案论证的系列方法,包括构建工程周边三维空间地理信息数据采集与建库技术方法、优化空间插值算法来构建三维地质环境技术方法、基坑变形监测与三维变形模拟技术方法等,用来辅助基坑工程施工方案论证与决策。并结合天津市地铁6号线红旗南路站基坑工程施工方案进行试验,成效突出。

The traditional method of foundation pit demonstration is on the two-dimensional map, experts need to do a lot of preliminary works before the demonstration, this brings many problems like time-consuming, low efficiency and difficulties to archive and access after the completion of the project. In order to solve the problems, a series of methods by using 3D GIS technology to support foundation pit scheme argumentation are put forward, including the technology of data collection and database building for 3D spatial geo-information around the project, the technology of constructing 3D geological environment by optimizing the spatial interpolation algorithm, the technology of deformation monitoring and 3D deformation simulation for foundation pit, etc., so as to assist the scheme demonstration and decision-making for the foundation pit construction. Combined with the foundation pit project of Hongqi South Road Station on metro Line 6 in Tianjin City, the 3DGIS technology is verified to have outstanding performance.