New type double wall structures, which have steel structural partitions in their sand-fill part, are proposed. Their static behavior and validity of using partitions were examined through model tests. The results are as follows: (1) Partitions give high loading capacity and diminish deformation. (2) The loading condition affects deformation of a double wall. And partitions are more effective when the main load acts on its front sheet-pile wall. (3) Rigidity and depth of partitions play a leading part in the behavior of these types of double wall structures.
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