A Fundamental Study of Sampling Disturbance Effects on the Behavior of Soft Cohesive Deposits

拟议的工作将把土壤采样过程视为一个应变控制问题，用于预测推送采样过程中土壤元素遵循的应变历史(或路径)。将利用分析框架和补充的实验测量。将进行分析研究，以确定在软、饱和粘性沉积物取样过程中和之后发生的土体变形以及应力和孔压的变化。将进行参数研究，以量化造成抽样干扰的各种因素的影响。将在实验室进行实验研究，以评估和验证分析预测。

The proposed work will treat the soil sampling process as a strain-controlled problem for predicting strain histories (or paths) followed by soil elements during the push sampling. Analytic framework together with complementary experimental measurements, will be utilized. Analytic investigations will be performed to determine the soil deformations and changes of stresses and pore pressures taking place during and after sampling of soft, saturated cohesive deposits. Parametric studies will be carried out to quantify influence of various factors which contribute to sampling disturbance. Experimental investigations will be performed in the laboratory to evaluate and validate analytic predictions.