Theoretical investigation of ground deflected mode after cementation

Abstract

Purpose. At present information about ground deflected mode after cementation is mostly disembodied because of inaccuraces of existent modeling methods and output information mode.Therefore it is necessary to develop principles of ground deflected mode after cementation investigation with computational modeling which based on finite-element method. There is a need to use comprehensive approach for simulation physical veracity evaluation. Methodology. Proposed principles of ground deflected mode after cementation in Plaxis were based on determination of total deformation, horizontal and vertical displacement in ground mass and raising of it’s dayligth. Volumetric strain option was used for modeling the mechanical process of cementation. It also take into account volume of injected grout and injection pressure. Findings. Model and loading diagram of sand bed high pressure cementation were developed. As a results soil density distribution, relations between total deformation, soil dayligth raising and grout volume were established and effectiveness of sand prior damping and plasticizer application for increasing the sand injection ability were verifyied. Originality. Based on the results of high-pressure cementation computational modeling experimental data of injection radius, sand physical characteristic modification for different damp state taking into account water-cement ratio of grout, plasticizer type and dosage were received. Practical value. Taking into account flat version (2D) Plaxis and elasto-plastic ground model developed principles can estimate for certain injection radius and ground deflected mode after cementation (ratio error is aout 7.5%) and thus can used for real strengthening designing.