Seismic Behavior of Soil Nailed Walls in the San Francisco Bay Area During the 1989 Loma Prieta Earthquake

该项目是NSF/USGS的一部分。 国家地震局的倡议 减少危害计划（NEHRP）， 调查洛马普列塔的影响 1989年10月17日地震。 它继续 研究开始于 在洛马普列塔地震之后， 收集地震的易损坏的数据 土钉墙支护结构的工作性能 弗朗西斯科海湾地区。 土钉支护是一种施工程序， 至海岸垂直土壤切口， 永久目的。 土钉支护不同 从传统的士兵堆和回接 支撑系统。 该技术 最早是在加州的San 弗朗西斯科地区，那里有许多临时和 永久性的墙已经在 过去5到6年。 主要关注的是 加州的土钉墙是他们的 地震时的表现。 该后续项目的主要目标是 分析收集的数据， 更好地了解行为 当受到 地震力 收集的数据 地震发生前， 地震数据来确定 墙和土壤的运动，并在钉 阻力 表演正在 根据土壤条件进行评估， 墙的几何形状和构造，以及地面 动议

This project is part of the NSF/USGS initiative within the National Earthquake Hazard Reduction Program (NEHRP) to investigate the effects of the Loma Prieta earthquake of 17 October 1989. It continues the research that was initiated the day following the Loma Prieta earthquake, namely to collect the perishable data on the seismic performance of soil nailed walls in the San Francisco Bay area. Soil nailing is a construction procedure used to shore vertical soil cuts for temporary or permanent purposes. Soil nailing differs from conventional soldier pile and tie-back shoring systems in many ways. The technique was first used in California in the San Francisco area, where numerous temporary and permanent walls have been constructed in the past 5 to 6 years. The major concern in California with soil nailed walls is their performance during earthquakes. The main objective of this follow-on project is to analyze the data collected so as to obtain a better understanding of the behavior of soil nailed walls when subjected to seismic forces. Data collected following the earthquake are being compared with the pre- earthquake data to determine the changes in the wall and soil movements, and in the nail resistance. The performance is being evaluated with respect to soil conditions, wall geometry and construction, and ground motions.