Earth pressures on and deformations of buried flexible pipes, precisely measured in 22 centrifuge model tests, were compared with FE elastic analysis. In the analysis, effects of friction force acting on the test container and stress dependency of soil's deformation modules were considered. Analyzed results conformed well to the test results, clarifying the mechanism of change in the mechanical behavior of the buried flexible pipes due to the following factors: pipe flexibility, type of pipe installation, and ground material. The analyzed results showed that the behavior of the pipes during the sheet-pile extraction was governed by the appearance of both vacant holes at the zones where the extracted sheet-piles initially occupied and loosened zones near the vacant holes.