Ground Motion and Liquefaction of Fill Soils in San Francisco during the 17 October 1989 Loma Prieta Earthquake

该研究项目是收集1989年10月17日北加州（洛马·普里塔）地震的易腐数据倡议的一部分。这是一个与弗吉尼亚理工学院和州立大学的G. Wayne Clough教授合作的项目。位于加州长滩的地球技术公司正在协助获取实地数据。地球技术公司的Geoffrey Martin和Edward Kavazanjian为该项目提供技术援助。Drs。Clough， Chameau和Kavazanjian在1979-1985年期间研究了大地震对湾区土壤的反应和土壤破坏。然而，观测到的洛马普里塔地震的影响似乎比预期的更广泛，部分原因是地面运动比十年前现有数据预测的更严重。该项目利用了之前的研究成果，重点关注了遭受严重地面故障的地区，如滨海区。与此同时，它正在利用自进行最初研究以来对地面破坏机制的改进理解。该项目的目标是：收集自1980年以来获得的相关岩土数据；绘制对确定液化程度和地面放大效应很重要的地面特征；在先前进行过测试的地点进行约30次锥突穿透测试；将上述资料整理成电脑化数据库；并对1989年地震前后的实地观测与资料之间的相关性进行初步评估。

This research program is part of the initiative to collect perishable data resulting from the 17 October 1989 Northern California (Loma Prieta) earthquake. This is a collaborative project with Professor G. Wayne Clough at Virginia Polytechnic Institute and State University. The Earth Technology Corporation, Long Beach, California, is assisting in obtaining the field data: in addition Drs. Geoffrey Martin and Edward Kavazanjian of Earth Technology Corporation are providing technical assistance to the project. Drs. Clough, Chameau, and Kavazanjian during the period 1979-1985 investigated the soil response and soil failures expected in the Bay Area as a result of a large earthquake: however the effects observed as a result of the Loma Prieta earthquake appear to be more extensive than was expected, in part because the ground motions were more severe than anticipated from data existing ten years ago. The project is utilizing these previous studies, focusing on the areas that suffered significant ground failures, such as the Marina District. At the same time it is using the improved understanding of ground failure mechanisms that has occurred since the original studies were undertaken. The objectives of this project are: to gather relevant geotechnical data obtained since 1980; to map ground features that are important to identify the extent of liquefaction and ground amplification effects; perform about 30 cone penetration tests at locations where earlier tests had been conducted; organize the above information into a computerized data base; and make preliminary assessments of the correlation between field observations and data obtained before and after the 1989 earthquake.