Experimental Study on Bearing Capacity of Fly Ash Pile Group Composite Foundation Under Cyclic Load
Based on the laboratory model test conducted under different cyclic load ratios and cycles, the effects of cyclic load on the bearing characteristics of fly ash pile group composite foundation are analyzed from the aspects of pile top cumulative settlement, pile body stress, inter-pile fly ash stress, pile-soil stress ratio, etc. The results show that there is a non-linear correlation between the cumulative settlement at the top of the pile and cyclic ampli-tude under cyclic loading. The cumulative settlement curve at the top of the pile can be divided into stable type and developing type. As the number of cycles increases, the stress on the pile body and the stress on the fly ash be-tween piles show a trend of first increasing and then stabilizing; When the number of cycles exceeds the critical number, the decreasing rate of the pile-soil stress ratio will converge; The increase in cyclic amplitude will lead to unstable soil arching effect.
cyclic loadmodel testfly ashcomposite foundationbearing capacitypile-soil stress ratio
万方数据
维普
