Abstract
In the problems such as the bearing capacity of farm soils or the indentation resistance of rigid punches to various machine elements, the width of loaded materials is not generally wide enough to be regarded as a semi-infinite body. The bearing capacity of the infinite body in the shape of a truncated wedge subjected to a single strip load was analyzed by use of slip-line method in the previous paper. Then, the applicability of analytical solution to practical problems should be verified by experiments.
In this paper, the authors report as to the model tests carried out to verfy the applicability of the theory mentioned above. A mixed soil of sand and clay was used in the model test. The cohesion and the angle of internal friction of the soil are 0.826kg/cm2 and 14.28° respectively, while the physical properties are shown in Table 1. The measured values of bearing capacity are shown in Table 2 in which φ is a half spreading angle of the wedge and ω is a ratio of the loading width ω to the top width W of materials.
The comparisons of the theory to experimental results are shown in Fig. 5 (a), (b) and (c). These figures show that the theoretical curves approxi-mate over the whole trend of experimental values, except for the small alue of ω. The bearing capacity for the state including the wide plastic zone, i. e., for the small value of ω would be generally overestimated, because the theoretical values are calculated using the cohesion and the angle of internal friction prescribed by the maximum shear stress.
It could be concluded through these comparisons that the theory formulated by the authors provides a guiding principle to predict the bearing capacity of plastic bodies such as soils, metals and so forth in the shape of truncated wedge.
