Reduction in Stiffness of Cohesionless Soil Due to Earthquake Loading

该行动是对NSF CES-8708747的后续行动，该行动涉及对动态扰动后砂土刚度损失的调查。1987年7月24日，在地震石油勘探期间发生了这样的扰动，引发了密歇根上半岛94号公路的路堤滑坡和随后的道路坍塌，该公路位于Munising市以西12英里处。这一事件有可能产生与原始奖励相关的宝贵数据。事故发生在标准的地震反射剖面上。6辆22吨重的卡车通过振动路面来产生地震信号，以进行反射研究。认为流动滑动是由液化型破坏引起的。事件发生后不久，Hryciw教授进行了必要的实地侦察，并获得了有关的资料和数据。目前正在分析这些数据。预计从这次地震剖面事件所获得的数据中可以提取出与地震荷载引起的无黏性土壤刚度降低有关的有价值的信息。

This action is a follow on to NSF CES-8708747, which concerns an investigation of the stiffness loss in sands following a dynamic disturbance. On July 24, 1987, such a disturbance occurred during seismic oil prospecting, initiating a road embankment slide and subsequent roadway collapse on Highway 94 in Michigan's Upper Peninsula, twelve miles west of the city of Munising. This incident has the potential to generate valuable data relevant to the original award. The incident occurred during standard seismic reflection profiling. Six 22 ton trucks were generating seismic signals for a reflection study by vibrating the road surface. It is believed that the flow slide was initiated by a liquefaction type failure. Shortly after the incident, Prof. Hryciw performed the necessary field reconnaissance and obtained the relevant information and data. This data are now being analyzed. It is expected that valuable information relevant to the reduction in stiffness of cohesionless soils due to earthquake loading can be extracted from the data obtained as a result of this seismic profiling incident.