Finite layer element method for ground subsidence calculation and the data field expression based on GIS

摘要

GIS build up by geo-science digitization 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 remarkable 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 multi-language 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.