Analyses Of Pile-soil-pile Interaction In Transversely Isotropic Layered Media

In this thesis, a model of transversely isotropic layered media is used to simulate the soil layers. The thin layer element method is adopted to analyse the static and dynamic problems of soil layers. The rigid boundary, damping boundary and halfspace boundary can be employed to simulate boundary conditions of soil layers bottom, and the halfspace boundary are better when the ground vibrate at low frequency. The method for calculation of displacement in transversely isotropic elastic strata which formulate to different external static load is a improvement upon existing methods for dynamic problem.Based on the method of substructure, the pile and the layered soil with hole are considered as two substructures. By using the condition of equilibrium and compatibility at the interfaces of pile and soil, the settlement of single and the ground settlement influence by the pile were analyzed.By analyzing the interaction of Pile-soil-pile in the Transversely Isotropic Layered Media, the interaction coefficient of two piles was calculated. The elastic superposition theory based on the interaction coefficient and the method of substructure were employed to get the settlement of pile group, and the results of two method were compared. Compared with the elastic theory, the method of substructure is more flexible to compute the settlement of pile group, for the elastic theory requires each pile has the same material and shape, and requires symmetric layout and load.The bearing capacity of single pile is a major factor for estimating the quality of pile foundation engineering. Vertical static test of pile is recognized as a direct-viewing and reliable method for testing pile bearing load. Anchor pile and trial pile is interactional in the static test with anchor pile providing counterforce. Analysis of the interaction of pile-soil-pile was applied on the static test with anchor pile, and the test data was modified.