Abstract
This paper contains several theoretical discussions on settlements of bearing piles due to loading. In the differential equationn (3) on displacement u of an element cut perpendicular to the pile axis at depth z, skin friction-displacement curves on clay layers are assumed to be expressed approximately by the perfectly elastic and plastic lines as shown in Figure 3, and displacements of the points expressed by coefficients of subgrade reaction are considered as boundary condition. The solutions are obtained in each cases which single clay layer or some clay layers rest on base foundation, throughout from elastic range to plastic range of distribution of skin-friction f. From the comparison between the solutions and the results of loading test on one steel pile and pedestal pile, it is appeared that the Approximation on skin friction-displacement curves mentioned above is useful enough for practical purpose on analysis of the settlements. The characters of load-settlement curves, distributions of strain and displacement along pile axis due to loading, and the ratio of point-resistance to load etc, are discussed under the various conditions of clay layer and base foundation.
