The Load Transfer And Bearing Capacity Mechanism Of Rock-Socketed Piles

As a special pile style,the rock-socketed pile has the characteristic of high carrying capacity low settlement and weak group effects behavior,which satisfy the need of construction of high building and bridge etc,the mechanism of its load transfer has become a hot program.Recently,a great number of specialists published articles,studying and shedding lights on the behavior of this sort of pile.Few of them, however have provided typical test and convincing data on mechanism of this kind pile.In view of this ,based on widely collecting involved datum from domestically and abroad,the author of this paper systematically analyzed and summarized the mechanism of rock-socketed pile and its influential factors of all kinds.In the end,some conclusions were obtained .What the author have done are follows:(l)As to the mechanism of pile section within rock socked,the author introduced,analyzed and discussed Ian W.Johnston and Thomas S.K.Lam's test data and their theory,in which it was suggested that the interface between pile and rock be triangular joint between concrete and rock on microscopic A series tests are acted to simulate the shear behavior between pile and rock based on the suggestion.Otherwise the author analyse the influence of roughness of the interface to the mechanism of pile section within rock socket.Combined with the construction method,the author discuss the relation of the rock rigidity, rock quality, pile diameter etc with the roughness of the interface.(2)The author analysed the destroying form of the rock at the tip of pile, the end capacity transfer mechanism and influence of the rock rigidity, sediment thickness etc to the end capacity.At the same time the author summarized the calculation method of the end capacity.(3)With the elastic-plastic method,the author simulated the load transfer mechanism as to the situation that whether there are grooves between the rock and the pile, the difference of the ratio of socketed depth to the diameter, the change of the rock module,some valued conclusions are obtained.Based on the methods that are suggested by the scholar as to the design of the rock-socketed piles,the author apply the finite element method result to the design of the rock-socketed and summarized the table design method,which can offer reference to the design and construction of the rock-socketed pile.