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Non-Destructive Testing for Earthquake Hazards Mapping, Southeast Missouri, USA

机译:美国东南部密苏里州地震危害图的无损检测

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Multi-Channel Analysis of Surface Waves (MASW), Seismic Cone Penetrometer Test, Cross-hole and Ultrasonic Pulse Velocity shear wave velocity (Vs) data were acquired at 40 sites in the Poplar Bluff study area, southeast Missouri, USA. Poplar Bluff is located near the New Madrid Seismic Zone of southeast Missouri and adjacent states, the scene of three magnitude 7.5 to 8.0 earthquakes in 1811-1812. The Poplar Bluff area includes terrain in two very different physiographic provinces, the alluvial soil lowlands of the Mississippi Embayment and the residual soil uplands of the Ozarks. Shear wave velocity data along with databases of soil stratigraphy were used to characterize the geomaterials and generate a suite of 3-D maps depicting spatial variations in thickness, stratigraphy and Vs of soils in the Poplar Bluff area. A 3-D shallow subsurface materials model, complete with Vs test data, and an earthquake soil amplification map were prepared as well. These maps depict the lateral variability of the shallow subsurface geomaterials' Vs and stratigraphy, and their range of values or properties. The MASW technique for determining Vs was found to be the most useful and economical.
机译:在美国密苏里州东南部的白杨布拉夫研究区的40个地点获得了表面波的多通道分析(MASW),地震圆锥渗透仪测试,交叉孔和超声脉冲速度剪切波速度(Vs)数据。白杨布拉夫位于密苏里州东南部和邻近州的新马德里地震带附近,在1811-1812年发生了7.5至8.0级三级地震。白杨崖地区包括两个截然不同的地理省份的地形,分别是密西西比河使馆的冲积土壤低地和奥扎克人的残留土壤高地。剪切波速度数据与土壤地层数据库一起用于表征土工材料,并生成一套3-D地图,描绘了白杨布拉夫地区土壤厚度,地层和Vs的空间变化。还准备了一个3D浅层地下材料模型,该模型具有Vs测试数据,并准备了地震土放大图。这些地图描绘了浅层地下土工材料的Vs和地层的横向变化及其值或属性的范围。发现用于确定Vs的MASW技术是最有用和最经济的。

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