Study On Bearing Performance Of Large Diameter Bored Hollow Pile Of Prestressing Force Concrete

On the basis of construction technique of large diameter bored hollow pile of prestressing force concrete, through simulation test, this paper simulates the interaction of pile with side mediator and pile with end mediator respectively under different conditions of injected cement paste, analyses the changing regularity of ultimate skin friction in different depths and different mediators, and also studies the changing regularity of end resistance in different end mediators. By means of numerical emulation, it analyses the pile vertical bearing capacity under different lengths, diameters and strength parameters of mediators as well as the inner force under lateral and combined loads, giving the criterion of rigid pile and flexible pile. With elastic theory, the paper deduces the inner force calculating formula under eccentric load and the bearing capacity calculating formula under vertical load; establishes a complete design and calculating method of large diameter pile. This research findings will set a firm theoretical foundation for its widely application.