Random field-based gravel pile reinforcement liquefiable site sidesway evaluation method

The invention provides a random field-based gravel pile reinforcement liquefiable site sidesway evaluation method, which comprises the steps of calculating a gravel pile replacement rate based on site conditions, constructing a three-dimensional gravel pile-soil dynamic response model in finite element software, setting boundary conditions, and generating a standard penetration stroke number random field related to a three-dimensional space based on a Gaussian random field theory. Material parameters of the standard penetration stroke number random field in finite element software are determined, vibration excitation is input, nonlinear finite element dynamic calculation is carried out, lateral displacement caused by liquefaction is monitored and recorded, and the ground failure probability of the gravel pile reinforced liquefiable site is calculated; according to the method, all lateral displacement values possibly appearing on the earth surface under the given gravel pile replacement rate can be calculated,