The geometry and the depositional configuration of sand bodies affected by the 2012 Emilia earthquakes (Bondeno site, northern Italy) were reconstructed and the role of the sediment stacking pattern was tested using data from full-scale blast experiments. The research integrates remote sensing and surface geological mapping, subsurface investigations including stratigraphic coring and cone penetration tests, grain-size and petrography of sands, geotechnical and geophysical monitoring. Data are compared with the Mirabello blast test site, also in the epicentral area. The results highlight the preeminent role of sediment heterogeneity and their mechanical and compositional properties in modulating liquefaction in alluvial settings. The lateral confinement of the buried sandy bodies, their thickness, and the occurrence of a thick non-liquefiable crust influence the dissipation of the excess pore water pressure, as indicated by the blast monitoring, and therefore the duration of liquefaction phenomena, according to the local stratigraphic architecture.

中文翻译：

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从艾米利亚冲积平原（意大利）的全面实验推断的沉积物堆积模式对砂土液化的影响


重建了受 2012 年艾米利亚地震（意大利北部邦德诺遗址）影响的沙体的几何形状和沉积构型，并使用全尺寸爆炸实验的数据测试了沉积物堆积模式的作用。该研究整合了遥感和地表地质测绘、地下调查（包括地层取芯和圆锥穿透测试）、沙子的粒度和岩相学、岩土工程和地球物理监测。将数据与同样位于震中地区的 Mirabello 爆炸测试点进行了比较。结果突出了沉积物异质性及其机械和成分特性在冲积环境中调节液化的突出作用。根据当地的地层结构，埋藏沙体的横向限制、它们的厚度以及厚的不可液化地壳的出现会影响过量孔隙水压力的消散，如爆炸监测所示，从而影响液化现象的持续时间。