The first cyclic simple shear tests on high-quality retrieved specimens of Christchurch silty and sandy soil were performed to evaluate their liquefaction potential. The test specimens originate from stratified silty soil deposits in southwestern Christchurch which did not typically have surface manifestations of liquefaction after the intense shaking of the 2011 Christchurch earthquake. The soil's undrained cyclic stress-strain responses indicate cyclic mobility. The differences in the cyclic responses of the soil with different amounts of non-plastic silt are subtle. Specimens with greater cyclic stiffness degradation typically had lower post-cyclic stiffness. The soil stiffness was significantly lower in post-cyclic tests than in monotonic tests due to the large differences in the initial effective stresses between the two types of tests, loss of strength, age, and fabric effects. The field-adjusted laboratory-based cyclic resistances agree with CPT-based cyclic resistances from simplified liquefaction triggering procedures. Both assessments indicate the silty soil deposits generated high excess pore water pressures and liquefied during the Christchurch earthquake even though surface manifestations of liquefaction were not typically observed at the considered sites. The absence of liquefaction manifestation at the stratified silty soil sites highlights the importance of their system response.

对基督城粉质和沙质土壤的高质量回收样本进行了第一次循环简单剪切试验，以评估其液化潜力。测试样本来自基督城西南部的分层粉质土壤沉积物，在 2011 年基督城地震的强烈震动后，该沉积物通常没有液化的地表表现。土壤的不排水循环应力应变响应表明循环流动性。具有不同数量的非塑性淤泥的土壤循环响应的差异是微妙的。循环刚度退化较大的试样通常具有较低的循环后刚度。由于两种试验之间初始有效应力的巨大差异，后循环试验中的土壤刚度显着低于单调试验，强度、老化和织物效果的损失。现场调整的基于实验室的循环阻力与来自简化液化触发程序的基于 CPT 的循环阻力一致。两项评估都表明，尽管在所考虑的地点通常没有观察到液化的地表表现，但粉质土壤沉积物在基督城地震期间产生了高超孔隙水压力并液化。分层粉质土壤场地没有液化现象，突出了其系统响应的重要性。两项评估都表明，尽管在所考虑的地点通常没有观察到液化的地表表现，但粉质土壤沉积物在基督城地震期间产生了高超孔隙水压力并液化。分层粉质土壤场地没有液化现象，突出了其系统响应的重要性。两项评估都表明，尽管在所考虑的地点通常没有观察到液化的地表表现，但粉质土壤沉积物在基督城地震期间产生了高超孔隙水压力并液化。分层粉质土壤场地没有液化现象，突出了其系统响应的重要性。