FLEM FOR GROUND SUBSIDENCE CALCULATION AND DATA FIELD EXPRESSION MODEL BASED ON GIS
基于GIS的地下开挖沉陷计算的有限层法及数据场表达

GIS building up by geoscience digitalization and visualization is widely used in geotechnical engineering. Ground subsidence due to underground tunnel excavation and mining is a kind of drastic engineering disaster. It is valuable to conduct real-time prediction and evaluation of ground subsidence and its damage based on GIS,GPS,and RS technology. This paper provides a semi-analytic method,finite layer element method (FLEM),which is used in underground mining subsidence calculation and geological body stress analysis and gives out the displacement pattern,the strain matrix,the elastic matrix,the stiffness matrix of the element and the stress matrix of this method. It also presents the data model for this method integrated with GIS and data organization approach. Meanwhile,the multilingual integrated pattern and data visualization method based on GIS subsidence damage evaluation system are proposed;and the reliability of the method through the application of engineering examples is verified.