Analytical and experimental study for ultimate loads of eccentrically loaded model strip footings near a sand slope

摘要

To investigate the effect of the ultimate load of the footings near slopes, this paper presents the results of both a series of experimental and a series of analytical studies conducted with a centrally and eccentrically loaded surface and shallow model strip footing. The values of the ultimate load deduced from experimental tests are compared with values derived via an analytical solution based on the limit equilibrium approach and are found to be in good agreement. The analytical solution generated the bearing capacity coefficients (N_γ and N_q) charts for of internal friction angles (Φ) exceeding 40°. The results indicate that the ultimate loads decreased as the eccentricity increased. This decrease is due to the combination of eccentricity and slope. The N_γ and N_q coefficients follow similar trends and negatively correlate with e/B. Furthermore, the shapes of the charts of the N_q coefficient differ from those of N_γ. As the internal friction angle, Φ, increases, the rate of increase of the N_q values is small compared with that of the N_γ values. Moreover, the increase in the N_γ and N_q coefficients decreases for internal friction angles larger than 40°.