Abstract:

This article utilizes the ABAQUS software to a foundation pit establishment three dimensional finite element model.By altering soil parameter,retaining wall stiffness,embedded depth and the contact action between soil and enclosure structure,we made the comparative analysis.The results show that the contact action between soil bodies and enclosure structure has a great influence on the deformation and internal force of the pit support structure. We must consider the contact action between both in the finite element model; soil parameter has more influence on the deformation and less on the internal force; increasing the rigidity or the embedded depth of retaining pile wall can effectively reduce the sway of the retaining pile wall. But continues to grow is the sharp increase in bending moment of retaining pile wall.

Key words: foundation pit, three-dimensional finite element, enclosure structure