Settlement Calculation Method of Remolded Loess Based on Spatial Stress Solution Under Complex Parameter Conditions
Based on J.Boussinesq's analytical formula of stress component at any point in the elastic half space under load,the spatial stress state of soil at any point was obtained and it was introduced into the settlement calculation model.A method of introducing confining pressure into the settlement calculation of remolded loess was proposed.The influence of three parameters including deviatoric stress,moisture content and confining pressure to the strain development of remolded loess was analyzed by stress loading triaxial test.The strain law of remolded lo-ess under different parameters was obtained,and the settlement calculation formula of remolded loess strain affected by multiple parameters was put forward.Finally,the reliability of the formula was verified by engineering examples.The results show that the deviatoric stress,mois-ture content and confining pressure have a significant effect on the strain of remolded loess.The deviatoric stress and moisture content are pos-itively correlated with the compressive deformation of remolded loess,while the confining pressure is negatively correlated with the compres-sive deformation of remolded loess.The empirical formula of remolded loess strain fitted by three parameters is effective.Through the engi-neering case verification of Shanxi Lyuliang Airport,the model settlement calculation results are basically consistent with the actual settlement monitoring results,indicating that the model in this paper can be more reasonably and conveniently applied to the settlement calculation and analysis of the remolded loess engineering site.
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