Analysis Of The Stability Of Building Foundational Above Goaf

With the rapid development of mining cities and high speed railway,Many buildings are built above the goaf to produce surface additional stresses that make the overlying rock "reactivated",Collapse and compaction occur until surface deformation occurs.Therefore,buildings are deformed or even collapsed.Analysis of surface movement and deformation under loading or not and evaluation of building foundation stability are of great significance to the application of building engineering.Shandong province key construction project,Shandong Blue Sea Navigation Electronic Commerce Industrial Park project as the project background,the stability of the foundation is evaluated by the combination of the additional stress method and the surface residual settlement prediction method.The calculation of additional stress on a single building above a residual void must take into account the influence of other ground surface loads,the influence of other building loads within a certain range can not be ignored in the calculation of additional stress in a specified building.Through useing the broken gangue compression test and numerical simulation method,Analysising the influence of the water filling state in Goaf and the change of the size and position of the building load on the surface residual movement and deformation.It is found that water plays a certain role in the compression of fractured rock mass.Under the same load,the strain and swelling coefficient of red sandstone after water saturation are larger than those under dry conditions.With the increase of the axial load,the strain difference decreases,which indicates that the load is less than the load,and the water satiety has a great influence on the compression of the broken gangue.When the red sandstone is saturated,the saturated and red sandstone has greater strain and dilatancy coefficient when the dead load is larger under water immersion condition.Compared with the unfilled filling treatment,the residual subsidence of the red sandstone is reduced by about 86%.The regional sites are basically stable and suitable for the building of data processing buildings.Development of the foundation stability evaluation system above goaf use the simple and easy maneuverability of the VBA programming language based on the simplicity and ease of operation of the VBA programming language,The transformation of data point in CAD coordinates into EXCEL is realized.It is more convenient to extract the data coordinates of the observation station in the mine map.With the aid of the advantages of MATLAB numerical calculation software,the curve fitting module of observation data is used to calculate the fitting calculation of subsidence,horizontal deformation,curvature and so on.The corresponding profile curve and CAD,SUFER contour map are generated.The system can calculate the surface residual deformation for several years.The integrated design improves the efficiency of data processing.