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CONTRIBUTION OF RAFT ON LATERAL RESISTANCE OF PILED RAFT ON SANDY SOIL
Abstract
Piled raft is a recent innovative foundation. The superstructure loads are transmitted by piles and raft. It provides safe and economic foundation. In this paper, the influence of raft-subsoil interaction on a lateral behavior of the foundation was investigated. Three-dimensional models of the piled raft and pile groups were developed by ABAQUS program. Then, their lateral deflections were compared. A gap between the cap and subsoil in pile group was varied from 0.25m to 1 m. In addition, the pile spacing was changed as 3D, 5D, and 7D for both piled raft and pile group, where D is a pile diameter. A diameter and length of the pile were kept constant as 0.5 m, and 15 m respectively. The load condition consists of the vertical and lateral uniform loading. The subsoil is medium sand. The results indicate that the lateral deflections of the piled raft are smaller than in pile group by a minimum of 25%.
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References15
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