Simplified Method for Spatial Evaluation of Liquefaction Potential in the St. Louis Area
Simplified Method for Spatial Evaluation of Liquefaction Potential in the St. Louis Area
复制标题
圣路易斯地区液化潜力空间评估的简化方法
DOI：
10.1061/(asce)gt.1943-5606.0000450
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发表时间：
2011
影响因子：
3.9
通讯作者：
J. Rogers
中科院分区：
文献类型：
--
作者：
Jae‐won Chung;J. Rogers
作为美国地质调查局在圣路易斯大都市区进行的地震灾害测绘计划的一部分，地表地质测绘和地下岩土工程数据已被汇编成三维地理信息系统（GIS）。土壤液化的可能性，然后空间评估使用地下信息从562个钻孔的假设M7.5地震发源于新马德里地震带。应用岩土工程数据（标准贯入试验N值、上覆岩层压力和地下水深度）和场景峰值地面加速度（PGA=0.1、0.20和0.30 g）来评估地震液化的安全系数（FS）。在这些评价中使用液化势指数（LPI）方法，因为它允许计算整个圣路易斯都会区基岩上覆的10-25个离散地层深度的FS。LPI值来自计算值之间的相关性。
As a part of an earthquake hazard mapping program being undertaken by the U.S. Geological Survey in the St. Louis metropolitan area, surficial geologic mapping and subsurface geotechnical data have been compiled into a three-dimensional geographic information system (GIS). The potential for soil liquefaction was then spatially evaluated by using subsurface information from 562 boreholes for an assumed M7.5 earthquake emanating from the New Madrid Seismic Zone. Geotechnical data (standard penetration test N-values, overburden pressure, and depth-to-groundwater) and the scenario peak ground accelerations (PGA=0.1, 0.20, and 0.30 g) were applied to evaluate the factor of safety (FS) against earthquake-induced liquefaction. The liquefaction potential index (LPI) method was used in these evaluations because it allows for calculations of FS with depth for 10–25 discrete stratigraphic horizons overlying the bedrock across the St. Louis metropolitan area. LPI values were derived from the correlation between calc...