应力路径对盐城粉质黏土动剪切模量影响 试验研究.

Underground soil in coastal areas is often affected by various dynamic effects such as earthquakes, construction, and waves. In order to study the influence of stress path on the dynamic characteristics of silty clay, resonance column tests were conducted on undisturbed samples of silty clay at different depths in the Yancheng area under cyclic stress paths. The results show that stress history has a significant impact on the response of soil dynamic parameters, and there is a significant difference between the maximum dynamic shear modulus Gmax and dynamic shear modulus G of the soil between loading and unloading paths; When the confining pressure is between 0~80 kPa, Gmax rapidly increases and variability decreases; The geological age and burial depth play an important role in the variation of soil dynamic parameters. As the burial depth increases, the difference between Gmax under different stress paths and G when the confining pressure changes continuously expands. When the geological age changes, G shows a significant increase; Propose a fitting relationship between the maximum dynamic shear modulus and confining pressure based on experiments, and provide fitting results for silty clay with different stress histories, providing reference for engineering design and construction in Yancheng and related coastal areas. [ABSTRACT FROM AUTHOR]