The Experimental Researching On The Minicrystal Cement-Stabilized Soil (CSS) Additive Recipe And The Numerical Test On Stress Field Of Composite Foundation

This paper mainly expounded the experimental researching on the minicrystal Cement-Stabilized Soil (CSS) additive recipe and the numerical test on stress field of composite foundation.Firstly, base on the analysis of the mechanism of Cement-Stabilized Soil and the principles of hydration and hardening of cement, the author drew up the additive recipe of minicrystal Cement-Stabilized Soil. The results of a large quantity of orthogonal experiments indicated that the early intensity of Cement-Stabilized Soil can been swelled when the intermingle ratio was slow and the trendy of intensity increased due to time prolonging can be put off. Base on the analysis of the above experimental result, combining the experiments of scanning electron microscope, The author explained the mechanism of the minicrystal Cement-Stabilized Soil from the theory of Thermodynamic and crystallography.Secondly, Girding of Finite Element Method (FEM) is more precision while gird has been plotted more densely, if capability of computer can been done, according to the theory of continuum mechanics. The author accounted for the confine of girding taking into account the material property according to the conception of resembling continuum tiny element. And testified the extremum of gird by illustrating an example. The same time, the author discussed the mainly problem of non-continuum when using FEM.With the software of ANSYS6. 1, the law of the single pile stress field of composite foundation has been analyzed. The results show that isoclines of additional stress field of composite foundation take on the shape of saddle. But distributing dates is complex, because the pile lateral friction resistance affects it. Analysis a lot dates of additional stresses, the author know the law of them passing on, which are consistent with the law of longitudinal wave direction of its passing on parallel the direction of lode, and are consistent with the law of transverse wave while the passing on upright the direction of lode. The numerical test can gain the additional stresses and the pile lateral friction resistance by illustrating testified, and can solve some problem which cannot solve by the routine methods at present.