FEM Analysis And Examination Study On Pit Retained Pile When Space Between Changing

With the development of high-buildings and skyscrapers, pit excavations are used increasingly in congested cities to provided underground space. It is a important task to ensure the pit security in economic method. In the examination the deformation and internal force of the row-piles were contrasted when the pile space between changes . The width influenced by the pile in the passive were particularly discussed . In the examination the row-pile displacement and the internal force of the pile were tested .Based on the testing data the conclusion that the pile internal force and the pile displacement increase with the pile internal becoming larger is summed up. It is a meaningful conclusion that the single pile bear the soil pressure in the two pile width . It is prescribed in the cantilever pile retaining structure design regulations that the pile resistance width in the passive region isn't related with the pile space between, but only with the pile section size. That method is disbelieve. It is a new method that is related with the pile space between based on the Moore-Coulomb theory in this paper. When the resistance width in the passive region is according to the cantilever pile retaining structure design regulations, the pile internal force and displacement is adjacent to the testing data in the pile space between less than 3 times pile diameter ,but in pile space between larger than 3 times pile diameter the pile displacement is larger than the testing data . When it is according to the method in this paper , the displacement is inosculated to the testing data. The building pit is modeled with the finite element in the different pile space between. The same conclusion is reached.