臺北盆地沖積土層剪力波速量測方法不確定性之研究

This paper aims to investigate the variability of soil shear wave velocity (V_s) by different measurement methods, and characterize the uncertainty with statistical models. In engineering design, the application of V_s is widely developed, so it has become necessary in site investigation. However, due to the difficulty of taking undisturbed samples and quality control, field V_s measurement methods are believed as more reliable ways than laboratory tests, and there are many kinds of developed techniques in practice. Although the field methods are various, the variability between them is rarely discussed, and the discussion of the quantitative relation between them is even rarer. It would result in the lack of basis for engineering design. Therefore, this paper takes the Taipei Basin as an example, and simultaneously deploys 5 kinds of measurement methods on 13 adaptable sites respectively, and exploits the data to investigate the uncertainty of results by those methods. Finally, the corresponding statistical models for the aforementioned uncertainty are shown, as a reference for geotechnical engineering design.