The Consolidation Analysis On Vacuum Combined Surcharge Preloading Based On ABAQUS

The preloading method of combing vacuum with stack-load is a foundation treatment method, used widely in weak soil foundation processing,it have many advantages and get better benefits in engineering. With the constant using it is studied also deepened ceaselessly,the research of the reinforcement mechanism, construction technology, design the mechanism is not in-depth,So the study of this method has a very important significance.Through collecting the field experiment data and indoor test,we analysis the measured data and draw some conclusions. This paper main job has the following points:(1) Introducte the strengthening mechanism, finite element analysis of vacuum preloading and vacuum combined heap preloading.Expound Biot's consolidation theory. According to the consolidation of the equivalence principle summarizes the plastic dewatering plate become sand wall theory(2) Establish Calculation model for engineering example with ABAQUS, obtaine the analysis of the calculated data,and Draw their change rule.(3) The most important thing in simulation process of permeability coefficient is considering the change affects with saturation, briefly elaborated the permeability coefficient with the saturation change theory . The article describes how to put the permeability coefficient with the saturation changes in the finite element software ABAQUS realized.By two factors of considering the permeability coefficient and load of loading rate,made contrast analysis of Settlement simulation value and settlement valuesThrough the simulation analysis shows that vacuum combined heap preloading can be imitated in finite element software of ABAQUS. This article can be refered to the engineering design and construction,also this is a method of simulating the engineering examples.