Abstract
By using the three-dimensional theory of elasticity, analytical solutions were deduced to obtain load sharing ratios and coefficient of group effects of piles supporting the caisson foundation. The results by the numerical calculations are as follows. The coefficients of group effects of piles in the horizontal direction are generally smaller than those in the vertical direction. In ordinary circumstances, the latter is two to three times as large as the former. The ratios (Rs) of the maximum load sharing ratio of the pile to the average one in the horizontal direction are Rs=1.2-2. On the other hand, ratios (Rs) in the vertical direction are Rs=1.02-1.1. In rational design of the caisson foundation supported by pile-group, the results mentioned above should be taken into consideration.
