鉛直力を受ける群杭の水平挙動に関する模型実験

概要

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This paper presents the experimental studies on the lateral behavior of pile group foundations up to failure under combined load. The results obtained from the studies can be summarized as follows. 1. In order to apply simultaneously both axial and lateral forces at the cap of pile group foundation, the apparatus having the lateral moving container on two rails was developed. The accuracies of conditions during all tests carried out were examined. 2. Group effect due to the interaction of piles gradually decreases as the pile spacing, R, increases. For R=2D (D: pile diameter), however, it is observed that the behavior deffers from others because of arch-action in sand. Furthermore, it is indicated that at the ultimate state of pile group foundations the deflection decreases and the latelal resistance increases as R increases. 3. In general, it is found that the group reduction factor decreases with increasing number of piles in a group, and increase in number leads to increase in ductility of pile group foundations. 4. For the pile groups subjected to vertical load, the lateral load-deflection curves have a peak, and the ultimate lateral resistance is reduced because of the additional moment caused by deflection, as compared the results without vertical force.
社団法人日本建築学会の論文
1988-12-30