| In the current study, basic soil tests are done on the soil material collected from area of blowing sand reclamation of Fangchenggang Qisha industrial park, including the tests of moisture content, specific gravity, liquid and plastic limit, and gradation. Secondly, the remodeled soft soil is manufactured successfully by using "soaking-loading" linkage that’s patent of studying team on mechanism simulation technology, by this way occurrence environment of the soft soil is " imprinted " to the remolded soft soil. Furthermore, the GDS dynamic triaxial apparatus is used to carry out a lot of cyclic triaxial tests on the remodeled soft soil, to focuse on the studying of how do consolidation confining pressure, consolidation ratio and dynamic load frequency have effect on the dynamic characteristics of remodeled soft soil. The main working contents of this paper are as follows:(1) In view of dynamic deformation properties of remolded soft soil, the effects of consolidation confining pressure, consolidation ratio and dynamic load frequency on hysteretic curve, backbone curve, dynamic elastic modulu and damping ratio of remodeled soft soil are studyed, also the models of backbone curve, decay model of dynamic elastic modulu, and models of damping ratio-dynamic strain are obtained, meanwhile empirical formula of the maximum dynamic elastic modulu and the maximum damping ratio are established considering multi-factor influences.(2) Through dynamic strength tests, and based on regarding double amplitude strain reaches 10% as the failure criteria, the effects of consolidation confining pressure, consolidation ratio and dynamic load frequency on dynamic strength properties of remodeled soft soil are studied. Firstly, the change law and similarities-differences of two dynamic strength curve ((?)d-Nf and Rf～Nf) are analyzed by different factors, and dynamic strength formulas are obtained under different conditions. Secondly, dynamic strength parameter, Cd and (?)d, are obtained by using dynamic moore circle, and the effects of consolidation ratio, dynamic load frequency and damage week on Cd and (?)d are studied. |
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