NGL SMT Cyclic Laboratory Test Data for the Development of a Liquefaction Triggering Model

The purpose of this study is to develop a liquefaction triggering model from results of cyclic laboratory tests that are published in the literature. The dataset presented here represents a range of specimen sampling and preparation methods (e.g., frozen, tube, reconstituted) and test types (direct simple shear, triaxial). Fines contents ranged from 0 to 25%, and all fines were nonplastic. Specimens were tested at effective consolidation stresses ranging from 10 to 1200 kPa. Measured cyclic resistance ratio, CRR, values were adjusted to a common effective consolidation stress, for differences in consolidation conditions in the laboratory relative to the field, and for multi-directional loading conditions. The resulting CRR values were used to develop adjustment factors to correct test data to equivalent CRRs corresponding to frozen sampling and DSS testing, and to develop a model for liquefaction triggering.

本研究旨在基于已发表文献中的循环室内试验结果，构建液化触发模型。本数据集覆盖了多种试样取样与制样方案（如冻结取样、薄壁管取芯、重塑试样），并包含直接单剪（direct simple shear, DSS）、三轴试验等多种试验类型。细粒含量介于0%至25%之间，且所有细粒均无塑性。试样的有效固结应力测试范围为10 kPa至1200 kPa。实测循环抗剪比（cyclic resistance ratio, CRR）值被统一校正至标准有效固结应力，以消除室内试验与现场固结条件的差异，并考虑多向加载工况的影响。基于修正后的CRR值，研究人员构建了修正系数，用于将试验数据校正为对应冻结取样与DSS试验的等效CRR值，并最终建立了液化触发模型。