加载工况下海陆交互相软土硬化土本构模型参数研究OA

Through a series of laboratory tests,the parameters for the hardening soil(HS)model of typical ma-rine and terrestrial deposit soft soil layers were obtained.Combined with a 60 m×30 m in-situ field loading test in Nansha,Guangzhou,a three-dimensional numerical simulation was established to investigate the validity of the constitutive model parameters under loading conditions.It was also compared with the Mohr-Coulomb model and the modified Cambridge model to analyze the selection applicability.The results indicate that the cohesion,modulus of deformation,and failure ratio of the marine and terrestrial deposit soft soil in the Nansha area are lower than those reported in existing researches.The parameters obtained from the tests can more ac-curately reflect the true mechanical properties of the soil layers in this region.The three-dimensional numerical simulation results agree with the actual monitoring values from the field loading tests,indicating that the ob-tained parameters can effectively simulate the actual loading conditions at the site.Compared with the Mohr-Coulomb model and the modified Cambridge model,the HS model exhibits better applicability for the marine and terrestrial deposit soft soil in the coastal transition zone of Nansha,Guangzhou.