Study On Application Of Steel Reinforced Concrete Support Piles In Foundation Pit

In the recent years,along with the high-speed development of city construction,a great number of high-rises are constructed together with the exploitation of the underground structure,which surely brings large-scale excavation and support of the foundation pit project. Because of the influence of the underground pipeline which have a wide distribution around the project as well as the limitation about working surface,Pile-Anchor support system is often used in engineering. In this paper, the earth pressure calculation of the basic theory and the traditional structural design methods associated with the foundation pit have been analyzed and evaluationed comprehensively. In view of the Pile-Anchor support system,this article summarizes the impact when the supproting piles added supports,and describes the current design methods and theories on Pile-Anchor support system.Steel reinforced concrete supported piles (referred to stiff pile) which is configured the concrete piles with steel,form pile-anchor support system with anchor. In this paper, this new support system is detailedly analysed by large finite element software ANSYS. Compared with ordinary reinforced concrete support piles,Steel reinforced concrete support piles had higher bearing capacity by making full use of the tensile and piezotropy of the steel,and had better ductility. Steel reinforced concrete support piles had many advantages with simple construction and short construction period. It is worthy of being used widely in engineering practice.In the actual project, there are many external factors that impact displacement of pile. In this paper,the external factors that impact displacement of pile is detailedly analysed by large finite element software. Draw the different effects of support structure about pile concrete level, the physical properties of soil, anchor set-up and groundwater levels,and list specific examples of projects simultaneously.With the development of excavation,increasing depth of excavation and more and more irregularly shaped planar,the spatial effect of excavation increasingly affects the design and construction of foundation pit system. In this paper,the finite element program ANSYS is used to consider the spatial effect,and have do reaserch about the reaction of the supporting piles in the excavation process,and has also discussed the geometry size and structure angle department effect impact to the retaining wall displacement,the pressure distributed influence, have a systematic analysis for the spatial effect of the excavation. If the spatial effect of the foundation is applied to the design of supporting structure,we can decrease the amount of supporting structure and reduce costs.