臺北盆地沖積土層剪力波速量測方法不確定性之研究

本文旨在探討各現地土壤剪力波速量測的變異性，並利用統計方法率定各項方法間的模型不確定性。工程設計上，土壤剪力波速的應用十分廣泛，因此常屬工址調查中必要之項目。然因不擾動土壤樣本不易取得且品質難以掌握，因此現地土壤剪力波速量測法仍為較可靠之方法。在實務上，土壤剪力波速實測方法很多，亦有各方法之比較，然各方法量測結果間之變異卻鮮少被討論，其量化研究更是稀少，使工程設計者在評估現地量測結果時鮮有依據。因此，本研究首先蒐集、整理臺北盆地內，13處同時進行各種現地剪力波速量測之場址實測結果，並利用所得資料探討各方法間量測結果之變異性。本文最後提出一套各方法間變異性的統計模式，期能供工程界參考應用。

關鍵字

土壤剪力波速；現地波速量測方法；模型不確定性；臺北盆地沖積層

並列摘要

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.

並列關鍵字

shear wave velocity ； seismic testings ； model uncertainty ； alluvium of Taipei basin

國際替代計量

臺北盆地沖積土層剪力波速量測方法不確定性之研究

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