A Preliminary Searching Attempt for the Liquefied Critical Void Ratio of Soil Particles in Yilan Area, Taiwan

In recent years, the research on the liquefied critical (threshold) void ratio of soil deposit has become a fascinating topic. This paper tries to utilize the current liquefaction evaluation criteria to make theoretical use of the collected soil geological survey data. In this study, the liquefied critical void ratio is discussed in the particle size characteristics of soil through the particle packing model. Utilizing the microscopic study of the critical void ratio of the soil, the particle packing model can be applied to the in-situ soil practically. This study is based on the particle packing model and the liquefied critical void ratio database of in-situ data to carry out numerical regression analysis. This paper conducts a variety of discussions on the soil particle packing model and the in-situ soil to demonstrate the suitability of the model in practical applications. Through the complete database verification and correction, an empirical formula for in-situ critical void ratio suitable in Yilan area is obtained. This paper proposes a set of hypothetical formulas for predicting the critical void ratio in Yilan area, \(e_{i}^{\text{cr}} = 0.5455\left( {1 + 0.47C_{u}^{ - 0.15} } \right)d_{i}^{ - 0.088\rho }\), to provide an innovative approach of liquefaction judgment. This study makes the estimation of the critical void ratio of soil liquefaction more comprehensive and improves the knowledge of evaluating soil liquefaction. Hopefully, the proposed liquefied critical void ratio can be used to evaluate the soil state to judge the possibility of soil liquefaction for having certain benefits on the local public infrastructure in Yilan area for the future.