Abstract:Creep can cause changes in the strength parameters of foundation soil.To quantitatively analyze the impact of creep on the bearing reliability of gravity wharf,a time-varying model for the mean value and variation coefficient of soil strength parameters is established based on the results of triaxial creep test of marine undisturbed soil.The time-varying reliability of gravity wharf bearing under creep action is studied by using the stochastic finite element method,and the influence of variation coefficients of soil strength parameters and related distances on the bearing reliability is analyzed.Adjustment coefficient of resistance partial coefficient considering the creep effect of foundation soil is proposed.The research results show that under the action of creep,the average cohesion of soil decreases but the coefficient of variation increases,and the average internal friction angle decreases while the coefficient of variation decreases.When a constant partial resistance coefficient is used,the load bearing reliability of the terminal decreases,and the partial resistance factor needs to be adjusted to maintain the same safety level.The adjustment coefficient of resistance partial coefficient is related to the initial variation coefficient of the foundation soil parameters,the relevant distance and the specified safety level.Overall,it decreases with the increase of the partial resistance coefficient.
