Based On ABAQUS Of Vacuum-surcharge Preloading Stress Paths Mechanism And Settlement Prediction Analysis

Vacuum combined surcharge preloading method as a kind of soft soil foundation reinforcement treatment method has been widely used.Although vacuum combined surcharge preloading method from the mechanism research?design theory?construction technology and other areas have been in-depth understanding and development,The big gap have compared the theoretical study with the engineering practice,Engineering are still many theoretical problems no uniform understanding.this thesis is the basis of previous research by collecting field data and theoretical analysis,vacuum combined surcharge preloading method to analyze the stress path reinforcement mechanism and finite element analysis method,and the based on actual data Settlement prediction problem is Depth discussion,The main conclusions of the work:(1)Summarizes the geotechnical engineering stress path of knowledge,Analysis of soil samples in triaxial stress paths and soil deformation analysis,Reinforcement mechanism introduces three drainage consolidation method of stress path analysis,In the course of the Reinforcement vacuum combined surcharge preloading method than preloading method of more stable,Better than the reinforcement effect of vacuum preloading method.(2)According to the principle of equivalence consolidation,Analysis of the play vertical drain of foundation transform equivalent of permeability coefficient as equi-valent foundation,And the calculation method of equivalent sand wall ground,And the complex three-dimensional foundation model is simplify for the two-dimensional plane strain simple finite element model.(3)Application ABAQUS finite element software,The three drainage consolidation method for reinforcement of soft foundation the effective stress path were studied.(4)The settlement prediction method commonly used in engineering are introduced in basic principle and characteristics.