FIELD EVALUATION OF LIQUEFACTION POTENTIAL BY ARIAS INTENSITY DUE TO IMPACT LOADING

在过去的35年里，人们对地震荷载引起的松散、饱和、无粘性土壤的液化进行了广泛的研究，从而产生了基于实验室和经验的液化潜力评估程序。 Kayen和Mitchell（1997）提出了一种基于阿里亚斯烈度的地震方法，以评估液化潜力，该方法已被证明是高度可靠的。 (The阿里亚斯强度间接地解释了地震运动的震级和持续时间。） 我们建议评估Kayen和Mitchell（1997）液化评估方法对其他（非地震）荷载类型的适用性。 负荷的来源是2000年3月26日发生在西雅图市中心的Kingdome的内爆。 Kingdome地基土壤由潜在的可液化填料和冲积沉积物组成;然而，在内爆之前，没有既定的程序来评估土壤是否会由于坠落结构物产生的冲击而液化。Shannon Wilson安装了一系列井下和地面仪器来测量地面运动和混凝土坠落碎片产生的孔隙压力。 这种冲击荷载类似于深层动力压实（一种常用的土壤改良方法）产生的荷载。 我们建议分析香农威尔逊收集的数据在Kingdome内爆，以评估适用于基于地震液化的概念，液化引起的传统拆除/现场改善技术的有效性

The liquefaction of loose, saturated, cohesionless soils due to earthquake loading has been studied extensively over the past 35 years, resulting in both laboratory and empirically based procedures to evaluate liquefaction potential. Kayen and Mitchell (1997) proposed an earthquake-based approach based on Arias intensity to assess liquefaction potential that has proven to be highly reliable. (The Arias intensity indirectly accounts for both magnitude and duration of an earthquake motion.) We propose to evaluate the applicability of the Kayen and Mitchell (1997) method for liquefaction evaluation to other (non-seismic) types of loading. The source of the load is the implosion of the Kingdome in downtown Seattle, which took place on March 26, 2000. The Kingdome foundation soils consist of potentially liquefiable fill and alluvial sediments; however, before the implosion there was no established procedure to evaluate whether the soils would liquefy due to the impact produced by the falling structure.Shannon & Wilson installed an array of downhole and surface instruments to measure ground motion and pore pressure generated by the falling pieces of concrete. This sort of impact load is analogous to loads produced by deep-dynamic compaction, a commonly used soil improvement method. We propose to analyze the data collected by Shannon & Wilson during the Kingdome implosion to assess the usefulness of applying earthquake-based liquefaction concepts to liquefaction induced by conventional demolition/site improvement techniques