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

POWRE奖支持开发岩土工程场地表征的地球物理方法。 将进行现场实验和分析，以开发一种技术，利用地震表面波确定岩土工程场地的横向变化。 地震波穿过地球的速度是地球刚度的函数。 通过测量穿过地球的地震波速度的变化，可以推断刚度的变化。 面波是一种沿地面沿着传播的地震波。 在分层介质中，它们的传播速度随波长而变化。 这种色散特性使得能够非侵入式地测量地球刚度随深度的变化。 面波目前正被用于岩土工程和地球物理学中，以确定场地随深度的变化。 随着进一步的研究，该方法也可以扩展到解决刚度的横向变化。 该POWRE奖将有助于带来一个研究生或博士后研究人员与岩土工程以外的补充技能的参与。 这将扩大研究基础，发展其多学科方面，并将支持主要研究员与相关领域的专家建立伙伴关系，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.