小应变硬化土(hardening soil with small strain stiffness,HSS)模型能反映土体在小应变范围内的非线性,广泛应用于土工变形分析.海上风电基础对变形控制要求高,需考虑土体的小应变特性.通过固结试验、三轴固结排水试验、三轴固结排水加卸载试验与共振柱试验,获得了江苏大丰海域海洋土HSS模型主要参数,并建立了HSS模型相关模量参数与土体物理参数之间的关系.试验成果可为海洋土HSS模型分析及参数取值提供重要参考,具有一定的工程价值.
EXPERIMENTAL STUDY ON THE MAIN PARAMETERS OF HSS MODEL FOR MARINE SOILS IN DAFENG AREA,JIANGSU PROVINCE
The hardening soil with small strain stiffness(HSS),which can clearly reflect the nonlinear behavior of soils at small strain range,has been widely applied in numerical analysis of soil deformation.The offshore wind turbine foundation requires a strict control of soil deformation and hence it needs to consider the soil small strain properties.In this study,laboratory tests,including oedometer,consolidated drained triaxial,drained loading-unloading-reloading triaxial and resonant column tests,are carried out to determine the HSS model parameters for the marine soils in Dafeng area,Jiangsu province.The relationship between these parameters and the physical properties of the soil is also proposed.The test results can provide important references for determining the model parameters in numerical analysis using HSS model.
hardening soil with small strain stiffness(HSS)modellaboratory testmarine soilparameter determinationmodulus
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