POWRE: Establishing Lateral Variability of Geotechnical Sites Using Seismic Surface Water

POWRE奖支持开发一种用于岩土场地表征的地球物理方法。将进行现场试验和分析，以开发一种利用地震面波确定岩土场地横向变异性的技术。地震波在地球上传播的速度是地球硬度的函数。通过测量穿过地球的地震波速度的变异性，可以推断出刚度的变异性。面波是一种沿地表传播的地震波。在层状介质中，它们的传播速度随波长变化。这种色散特性使得能够非侵入性地测量地球硬度随深度的变化。面波目前正被用于岩土工程中，这是一种确定场地随深度变化的地球物理方法。随着进一步的研究，该方法还可以扩展到解决刚度的横向变化问题。POWRE奖将有助于吸引在岩土工程之外具有互补技能的研究生或博士后研究员参与进来。这将通过发展其多学科方面来扩大研究基础，并将支持首席调查员与相关领域的专家之间发展伙伴关系，如数字信号处理、空间相关数据的统计分析和地球物理学。

A POWRE award supports the development of a geophysical method for geotechnical site characterization. Field experiments and analyses will be performed to develop a technique for establishing the lateral variability of geotechnical sites using seismic surface waves. The speed with which seismic waves travel through the earth is a function of the stiffness of the earth. By measuring the variability of seismic wave velocity through the earth, the variability of stiffness can be inferred. Surface waves are a type of seismic wave which propagate along the ground surface. In a layered medium, their propagation velocity varies with wavelength. This dispersive characteristic enables non-intrusive measurements of the variation of the earth's stiffness with depth. Surface waves are currently being employed in geotechnical engineering an geophysics to establish the variability of a site with depth. With further study, the method can be expanded to address lateral variations in stiffness as well. The POWRE award will help to bring about the involvement of a graduate student or post-doctorate researcher with complementary skills outside of geotechnical engineering. This will broaden the research base by developing its multidisciplinary aspects and will support development of partnerships between the Principal Investigator and experts in relevant fields, such as digital signal processing, statistical analysis of spatially correlated data, and geophysics.