RAPID: Geotechnical Engineering Reconnaissance of the M 8.8 Chile Earthquake of February 27, 2010

2010年2月27日，智利中西部海岸发生8.8级地震(美国地质调查局将其命名为智利莫勒近海8.8级地震)。一场影响沿海、平原和山区自然地面和工程设施的8.8级巨型地震对美国太平洋西北部和世界各地许多类似的地震情景都非常重要。捕捉横向扩散的细节和液化对建造良好的结构(如港口设施)的影响是重要的。记录一些边缘地球结构是如何幸存下来的很重要。表征土坝和尾矿坝在不同震中距离的性能至关重要。了解土壤/地质条件如何影响观测到的破坏模式很重要。记录现场长时间地面运动的影响是至关重要的。构造变形和地表次级断层破裂效应也可能是重要的。现场勘察将专注于捕获易腐烂的数据，但团队也将通过以下方式执行土壤的岩土工程特征：(1)喷射物的检查，(2)手持圆锥渗透测试，以及(3)手持设备测量剪切波速度(V)。该勘察团队通过地球工程极端事件侦察(GER)协会进行协调。GER小组正在与地震工程研究所(EERI)和海洋科学海啸小组等其他组织协调的侦察小组密切合作。

On February 27, 2010 a magnitude Mw 8.8 earthquake struck the central west coast of Chile (named by the USGS as the Magnitude 8.8 Offshore Maule, Chile Earthquake). A megathrust Mw = 8.8 event that affects natural ground and engineered facilities in coastal, plain, and mountainous areas is of great importance for the Pacific Northwest of the United States and for many similar earthquake scenarios throughout the world. Capturing details of lateral spreads and the impacts of liquefaction on well-built structures, such as port facilities, are important. Documenting how some marginal earth structures survived is important. Characterizing the performance of earth dams and tailings dams at different epicentral distances is critical. Understanding how soil/geologic conditions influenced the observed damage patterns is important. Documenting the effects of long duration ground motions in the field is critical. Tectonic deformation and secondary surface fault rupture effects may also be important. Field reconnaissance will be focused on capturing perishable data, but the team will also perform geotechnical characterization of the soils through: (1) examination of ejecta, (2) hand-held cone penetration tests, and (3) hand-carried equipment to measure shear wave velocities (Vs).This reconnaissance team is coordinated through the Geoengineering Extreme Events Reconnaissance (GEER) Association. The GEER team is working closely with the reconnaissance teams coordinated by other organizations such as the Earthquake Engineering Research Institute (EERI) and the Ocean Science Tsunami Group.