The Soil Liquefaction Potential Map of Taipei Basin Based on a Refined Borehole Database

The Soil Liquefaction Potential Map of Taipei Basin Based on a Refined Borehole Database

The purpose of this study is to establish a reliable borehole database for the creation of a soil liquefaction potential map of the Taipei Basin. In the example presented here, information from over four thousand boreholes widely distributed across the Taipei Basin is first collected from different databases. For the geological boreholes, the soils are first classified according to the unified soil classification system (USCS), and a brief introduction of the geological characteristics of the area is created according to the analysis of the different soils. Then, external forces are considered to evaluate soil liquefaction, including factors such as the peak ground acceleration of the earthquake and the ground water table. A soil liquefaction evaluation is conducted to determine the factor of safety against soil liquefaction for each soil layer in the boreholes. The concept of a liquefaction potential index (PL) is adopted to evaluate the soil liquefaction effect in a liquefiable soil column. Finally, the study results are briefly summarized.