Experimental study on liquefaction influence factors of saturated silty soil using orthogonal design method

Silty soil is a transitional soil between clay and sand and is widely distributed around the world. With the rapid urban development and associated infrastructure need, silty soil has become more widely used as the bearing soil for foundations and roads. The liquefaction of silty soil under the earthquake can cause serious damage to buildings and infrastructure resting on such soil. Correctly analyzing the dynamic characteristics of silty soil in earthquake areas plays a major role in the success or failure of infrastructure construction. Therefore, it is particularly important to study the various factors affecting the dynamic characteristics of silty soil and to analyze the changing trend and associated mechanism on the dynamic characteristics of silty soil. In this paper, a set of cycle triaxial tests were carried out using the orthogonal design method to study the effects of four factors, namely initial void ratio, load frequency, clay content and silt content, on the dynamic characteristics of saturated silty soil at different levels. The orthogonal design method is used to study the order of influence of four factors on the dynamic strength and excess pore water pressure of silty soil, and the significance level of each factor was also assessed.