Reconnaissance of the Geotechnical Aspects of the February 28, 2001 Nisqually Earthquake

这项行动是为了支持一项研究，以完成在2001年2月28日尼斯奎利地震后第二天开始的地震后勘察工作，并进一步记录这次地震造成的重要地面故障和建筑物损坏的观察结果。发生严重和轻微地面故障的工地的建筑性能的良好记录将通过选定的现场和实验室测试来开发。这些案例将在尼斯夸利地震震后勘察期间开发的网站上记录下来，并将在地震工程研究所(EERI)的《光谱》杂志上发表一篇论文。及时报告这些结果将使研究人员能够将这些数据纳入正在进行的研究中，并确定这场重要的太平洋西北地震带来的额外工作。布雷教授和他的一些同事以及研究生研究人员立即前往尼斯夸利地震的受灾地区，作为一个更大的勘察团队的一部分，他们完成了对这次地震一些更重要的岩土方面的记录。这包括对涉及德舒特斯公园路的重大横向扩展的地面变形进行详细调查，绘制马丁路路堤破坏处的地面变形图，记录和采样南西雅图几个建筑地基中的沉积物喷射物，以及对101号高速公路路堤坍塌进行调查。完成这些重要案例记录的部分后续研究将实现目标，重点是奥林匹亚的德舒特斯公园路和南西雅图的建筑地基性能。华盛顿州自然资源部的史蒂芬·P·帕尔默在震后勘察工作中提供了协助，他将参与目前的项目。

This action is to support a study to complete the post-earthquake reconnaissance effort begun the day after the February 28, 2001 Nisqually Earthquake, and to further document observations of important cases of ground failure and building damage from this event.Well-documented case histories of building performance at sites undergoing severe and minor ground failure will be developed through selected field and laboratory testing. These case histories will be documented at the website developed during the post-earthquake reconnaissance of the Nisqually earthquake, and in a paper to be published in the Journal "Spectra" of the Earthquake Engineering Research Institute (EERI). Timely reporting of these results will enable researchers to incorporate these data into ongoing studies and identify additional work resulting from this important Pacific Northwest earthquake. Professor Bray and some of his colleagues and graduate student researchers traveled immediately to the affected area of the Nisqually earthquake, and as part of a larger reconnaissance team completed documentation of some of the more important geotechnical aspects of this event. This included conducting detailed surveys of ground deformation from a significant lateral spread involving the Deschutes Parkway, mapping of ground deformation at the Martin Way embankment failure, documentation and sampling of sediment ejecta in several building foundations in South Seattle, and surveying of the Highway 101 embankment failure.The goals of this follow-up study will be met in part by completing documentation of these important case records, with emphasis on the Deschutes Parkway in Olympia and the building foundations performance in South Seattle. Stephen P. Palmer, Washington State Department of Natural Resources, assisted during the post-earthquake reconnaissance effort and who will be involved in this current project.