Ground Motion and Liquefaction Study of Fill Soils in San Francisco - 1989 Loma Prieta Earthquake: Collaborative Research

这项研究计划是收集1989年10月17日北加州(Loma Prieta)地震导致的易腐烂数据的倡议的一部分。这是一个与普渡大学的Jean-Lou Chameau教授合作的项目。位于加利福尼亚州长滩的地球技术公司正在协助获取实地数据：此外，地球技术公司的杰弗里·马丁博士和爱德华·卡瓦赞健博士正在为该项目提供技术援助。Clough、Chameau和Kavazankin博士在1979-1985年间调查了湾区因大地震而预期的土壤反应和土壤破坏：然而，洛马普里塔地震所观察到的影响似乎比预期的更广泛，部分原因是，根据十年前的现有数据，地面运动比预期的要严重得多。该项目正在利用这些先前的研究，重点关注遭受重大地面故障的地区，如滨海区。与此同时，它正在利用自最初进行研究以来对地面故障机制的更好的理解。该项目的目标是：收集1980年以来获得的有关岩土数据；绘制对确定液化程度和地面放大效应很重要的地面特征图；在以前进行过试验的地点进行大约30次锥体贯入试验；将上述资料编入计算机化的数据库；并对1989年地震前后现场观测与资料的相关性进行了初步评估。

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 Jean-Lou Chameau at Purdue 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.