The Research Of Interaction Between Large Sunk Well Foundation And Foundation Soil

The theory of up-structure is better than others in civil engineering. Therefore, to the constructions which building soil foundation, the accidents of quality and safety induced by foundation problem. However, compression of foundation soil, displacement and stability of large foundation, are associated with the consolidation of soil. At present, soil consolidation analyzed by Finite Element Method in engineering numerical computation, is mostly limited on solution of two-dimension consolidation theory or plane solution of three-dimension consolidation theory.This thesis, based on the true three-dimension consolidation theory namely Biot's Consolidation Theory, adopting Duncan-Chang model and non-thickness Goodman friction element, compiles practical 3D non-linear FEM program. The conceptual geological model is established according to the north anchorage and feature of its foundation soil in ZhenJiang-YangZhou Yangtse Bridge. During the 3D finite element calculation, try to simulate different procedure of the construction (like sunk well in-filling, main cable erection, box girder hoist, bridge flooring and opening to traffic). And then, reveal the regulation of deformation and displacement on the foundation and soil during different period. After got these, this thesis put great attention on the analysis of the reason which cause the horizontal displacement of the cable saddle, as well as the regulation of the pressure's changing in the soil located on the front side of the sunk well foundation. Point out that the relative relation between the soil pressure in different depth and the horizontal displacement. These conclusions can be adopted hi practice and to be reference of the construction unit.