Analysis Of Mechanical Mechanism For Retaining Structures Of Deep Foundation Pit Of The Chenggongnan Station In Kunming Metro

This article, which take the Kunming Chenggongnan subway station deep foundation pit engineering as researched background, and which has proved the rationality of calculation model and calculation method by using elastic foundation beam rod finite element method and setting the standard section of foundation pit as an example. The test shows the unity of the numerical simulation and real date since the numerical simulation has been made by carefully selected a continuous wall then compared the calculation of the level movement of wall with the real date.It is logically proved, after using the Steel Support Structure instead of the original designed concrete support structure at the first step based on the model testing model style, that the Steel Support Structure is more practicable than the concrete support structure, nevertheless, the level displacement of the wall is a little more obvious than concrete support structure.It is discussed the different effects on foundation pit supporting structure which made by two different way of excavation, it comes that the dish excavation is more remarkable than Island excavation as the former one can effectively control the displacement of the wall.Finally, the article has made the feasibility study about the pile as a retaining structure,research shows that:Bored pile-foundation pit-sealing curtain. Though economically superior to the underground continuous wall, the water sealing up effect and safety are less than the latter.