Analysis Of Influencing Factors On Deformation Calculation Of Pits In Foundation-pit Support

Along with the rapid development of economic constructions, a larger number of high rise buildings have been built across the country. The greater scale construction of tall building and underground works, comes to more excavations, which are much deeper than past. Because of the complicated planar shape and supporting systems of deep excavation, much more disadvantages of inverted beam method are exposed. Combined one practical work located in Tianjin with its three-dimensional finite element model considering the interaction of fencing structure and soil, which built by ABAQUS, this article validates the correctness and suitability of the three-dimensional finite element simulation.Pits in foundation-pit are universally existed in deep foundation-pits, however, a number of fatal accidents constantly happens because of the lack of reasonable consideration of the effect of deformation and stability of pits in foundation-pit excavation. Apart from some quality issues during construction, most accidents are caused by the lack of its influence on deep excavation. Based on the three-dimensional finite element analysis and single factor analysis method, in this thesis, the following factors that affect the deformation of supporting systems are considered: supports or not,distance of pits in foundation-pit away form fencing structure,altitude difference of pits in foundation-pit,soil property etc.Based on the conclusions, this thesis provides the references to practical deep excavation engineering and further studies.