摘要
基于三维数字地质模型的地质空间剪切分析是"玻璃国土"建设所面临的关键技术之一。其难点包括复杂三维数据环境中的高效实体布尔运算方法,以及相关三维实体语义信息的实时查询处理。采用基于BSP树的多边形合并与分解技术,实现三维空间实体的布尔运算与矢量剪切;采用多线程实现不同要素集合的并行裁剪运算,并在三维空间数据库引擎的支持下,进一步提升地上地下一体化信息处理和语义查询效率。以武汉市规划信息系统为例,实现了地下硐室和隧道动态开挖过程的三维地质空间剪切分析,并结合水利水电工程地下厂房设计和矿山三维巷道设计实例,说明了基于三维数字地质模型的地质空间分析的综合应用效果。
3D dynamic cutting spatial analysis technology is one of key technologies in the construction of ＂Glass Land＂. The challenges of three-dimensional dynamic tunnel excavation and analysis include efficient entity Boolean methods in complex three-dimensional data environment and real time query processing of semantic information of related three-dimensional entities. The technology of polygon merging and decom- position based on BSP, combined with multi-thread technology is adopted to achieve parallel cutting opera- tions of different feature sets. With the support of three-dimensional database engine, the analysis efficien-cy is further enhanced for the integrated processing of above-ground, under-ground information and attrib- ute query. In the instance of Wuhan planning information systems, the simulation of three-dimensional tunnel dynamic excavation analysis process is achieved. Examples of underground plant for water conser-vancy and hydropower engineering and 3D laneway design for mine are given to show the effects of its com-prehensive application.
出处
《地质科技情报》
CAS
CSCD
北大核心
2012年第6期9-15,共7页
Geological Science and Technology Information
基金
国家863计划重点项目课题(2008AA121602
2012AA121401)
教育部高校博士点基金项目(20100145110009)
中央高校基本科研业务费专项资金资助项目(CUG090109
CUGL100229)
关键词
地质空间剪切分析
隧道开挖分析
三维空间分析
三维实体布尔运算
空间数据库
语义
cutting spatial analysis technology of geological space,tunnel excavation analysis
three-dimen-sional spatial analysis
three-dimensional entity Boolean calculation
spatial database
semantic
