Workshop on Future Research at Treasure Island, California

9612339 De Alba这一行动是为了支持一个小型研讨会，以研究如何进一步提高在加州金银岛进行的全面地震工程实验的价值。 金银岛是加州州弗朗西斯科湾的一个人工岛，接近理想的条件，可以进行全面的现场实验，研究软土地基在强烈地震震动中的反应。它位于圣安德烈亚斯和海沃德断层之间，预计在未来三十年内将发生7级或更大地震，概率大于67%。岛上的主要仪器场地是国家岩土工程实验场地之一，位于300英尺的土壤上，包括40英尺的水力填充砂，下面是软到硬的粘土。它毗邻Yerba Buena岛，这是一个岩石露头，因此可以测量和比较岩石露头，深层基岩和土壤的运动。 目前，金银岛上“消防站”现场的仪器包括在基岩和地面之间垂直阵列的六个加速度计，以及在上部可能液化的水力充填物中的六个压力计。这些仪器的安装（1993年完成）伴随着一个广泛的场地特征鉴定方案。美国海军、国家科学基金会、联邦公路管理局、美国地质调查局、加州矿业和地质部、电力研究所和位于戴维斯的加州大学合作支持金银岛国家岩土工程试验场。 本次研讨会要解决的主要问题是：什么是最好的使用强震信息，以改善或创建模型来预测在强地面运动下的软土的行为？需要哪些额外的研究中心信息？ 本次研讨会的目的是确保在下一次大地震发生时，所有主要信息都在现场，以便研究人员能够快速有效地使用所获得的数据，从而快速发展预测强地面震动下软土行为的改进技术。 ***

9612339 De Alba This action is to support a small workshop to examine how the value of the full-scale earthquake engineering experiment at Treasure Island, California, might further be enhanced. Treasure Island, an artificial island in San Francisco Bay, California, approaches ideal conditions for a full-scale field experiment to study the response of soft ground during strong earthquake shaking. It is located between the San Andreas and Hayward faults, on which a magnitude 7 or greater earthquake is expected to occur within the next thirty years, with a probability greater than 67%. The major instrumented site on the island, which is one of the National Geotechnical Experimentation Sites, is located on 300 feet of soil, including 40 feet of hydraulic fill sand, underlain by soft to hard clays. It is adjacent to Yerba Buena island, a rock outcrop, thus permitting motions of the rock outcrop, deep bedrock, and soil to be measured and compared. Currently, instrumentation at the "fire station" site on Treasure Island includes six accelerometers in a vertical array between bedrock and the ground surface, as well as six piezometers in the upper potentially-liquefiable hydraulic fill. The installation of these instruments (completed in 1993) was accompanied by an extensive site characterization program. Support for the Treasure Island National Geotechnical Experimentation Site has been a collaboration between the U.S. Navy, National Science Foundation, Federal Highway Administration, U.S. Geological Survey, California Division of Mines and Geology, Electric Power Research Institute and the University of California at Davis. The major questions to be addressed by this workshop are: What is the best use of strong motion information so as to improve or create models to predict the behavior of soft soils under strong ground motion? What additional site information is required? The goal of this workshop is to assure that all the major pieces of information are in pla ce at the time of the next major earthquake, so that the data obtained can quickly and efficiently be used by researchers, and thus lead to rapid development of improved techniques for predicting the behavior of soft soils under strong ground shaking. ***