Geological Modeling And Analyzing Of Beijing Subway Line 9

With the accelerating pace of urbanization, the urban population density is increasing with the problem of heavy traffic following. Beijing as the capital of my country, city developed, economic prosperity, population highly centralized, the space crowded, and traffic block has severely affected the urban function and the healthy development of the city. To ensure the subway construction and transport work can safe and effective, in-depth and comprehensive understanding of engineering geological conditions to become a problem to be solved.The 3D geological modeling of complex engineering geological body that is combining physical mechanics characteristic and geometric features to geological-mass space by using modeling software is use to show its specific image by 3D visualization technology. The technology improved traditional survey of the two-dimensional, static, qualitative research methods, which provides the new methods for engineering geological workers who can directly,precisely and dynamically analysis and research engineering geology phenomenon, discovered and master geotechnical body distribution and mechanics law.Papers using 3D Geological modeling software GOCAD (Geological Object Computer Aided Design) which represents international advanced technology professional as a platform, using kriging and discrete smooth interpolation(DSI) as the core technology, merging together much engineering survey data ,established the 3D Geological structure mainland Geological model and three-dimensional Geological parameter model of Beijing subway line 9 from Beijing west railway station to Fengtai science park station and also includes 40m range on both sides. Using 3D images form that dynamically and really show the strata distribution and mechanical properties changing rule at studied area, and proved the accuracy and feasibility of the models through the model testing. The paper using the GOCAD software provided any dissection technology got 3m,6m below the surface of model and elevation 22m, 33m cutting the geological modeling in order to intuitive and clearly show each section lithology,deformation and strength characteristics, then analyzed and evaluated the features, provided a reference basis for the future foundation evaluation research of multi-layer and high-rise building in this region and played a guiding role in live work of Beijing subway line 9.This study successfully complot the transformation from 2D scattered primitive information to 3D integrated digital information, realized the geological information visualization, the geological characteristics of the study area are showed truly and accurately. Easy to query and upgrade the geological information, and transformed the traditional qualitative analysis into quantitative analysis research, provided a more accurate and more intuitive geological information basis for the evaluation of the engineering geological conditions. Meanwhile, as the 3D mesh model construction, realized the geological information query for the arbitrary point, and the grid information can output multiple formats data, which provides convenient for other software to help the further research work.