Ground Motion and Liquefaction Study of Fill Soils in San Francisco Using Observations from the 17 October 1989 Loma Prieta Earthquake

本项目旨在总结1989年10月17日北加州（洛马普里塔）地震的经验教训。这是普渡大学Jean-Lou Chameau教授联合项目的延续，该项目由探索性研究（SGER）计划资助。该项目的目标是：收集相关岩土工程数据；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。这个持续的联合研究项目的目标是研究旧金山北部和东部周边以及旧金山南部地区填充土的地面运动和液化特征。填埋土是洛马·普里塔地震对旧金山湾区造成破坏的主要因素。Drs。加州长滩地球科技公司的G.R. Martin和E. Kavazanjian作为顾问参加了会议，使用地球科技公司的设备完成了锥突和膨胀仪的测试。这个项目的动机在于：可以从观察到的填充物和近期沉积物对地震的反应中学到重要的经验教训；有独特的机会研究1970年代和80年代调查过的地点以及对预期业绩作出具体预测的地点；能够将观察到的性能用作实地实验室，以测试最先进的最新发展；并有机会从对旧金山和附近社区有直接价值的研究中产生结果。

This project addresses the lessons learned from the 17 October 1989 Northern California (Loma Prieta) earthquake. It is a continuation of a joint project with Professor Jean-Lou Chameau at Purdue University that was funded through the Small Grant for Exploratory Research (SGER) program: The objectives of this project were: to gather relevant geotechnical data; 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. The objectives of this continuation joint research project are to study the ground motion and liquefaction characteristics of the fill soils that surround the northern and eastern periphery of San Francisco as well as areas south of San Francisco. The fill soils are a major element in the damages that occurred in the Bay Area due to the Loma Prieta earthquake. Drs. G.R. Martin and E. Kavazanjian of Earth Technology Corporation in Long Beach, CA, are participating as advisors, and the cone penetration and dilatometer testing is being accomplished using equipment of the Earth Technology Corporation. The motivation for this project lies in: the important lessons that can be learned from the observed response of the fills and underlying recent sediments to the earthquake; the unique opportunity to study sites that had been investigated in the 1970's and 80's and where specific predictions had been made as to expected performance; the ability to use the observed performance as a field laboratory to test the latest developments in the state-of-the-art; and the opportunity to generate results from research that has direct value in San Francisco and nearby communities.