The Deflection Characteristics of Pile Foundation in High-rise Mountain Building Considering the Spatiotemporal Effects of Pre-fill Deformation
Based on the Burgers viscoelastic constitutive model,a numerical model considering the time-space effect of pre-fill deforma-tion is established.Through the inversion analysis of the inclination process of mountain high-rise buildings,the correctness and reliability of the model are verified.At the same time,the influence of different pre-filling standing time on the deflection of high-rise buildings and pile foundations is further studied.The results show that the building inclination value is very small without considering the time effect of pre-fill deformation,while the negative friction force and uneven settlement will increase significantly under the influence of pre-fill deformation and construction sequence.With the increase of the standing time of the pre-filled soil,the residual settlement of the pre-filled soil under the action of self-weight gradually decreases,and the phenomenon of building inclination also weakens.The research re-sults can provide useful reference for the inversion analysis of high fill mountain building deformation,as well as the prophylaxis and treat-ment of building deviation.