Analysis of influence of inner walls on deformation characteristics of retaining structures and adjacent soil

摘要

A retaining structure induces a specific spatial effect because of differences in its stiffness at different locations. When a partition wall is placed inside a retaining structure, it can significantly influence the development of the deformation of the retaining structure and the adjacent soil. In this study, a three-dimensional finite element analysis was performed on the deformation of the retaining wall, and the result revealed that a partition wall at the center of a retaining wall can significantly reduce the maximum lateral displacement of the retaining wall. The maximum lateral displacement of the retaining wall without and with a partition wall was 68.1 mm and 45.2 mm, respectively. The lateral displacement reduced by 33.6% in the presence of partition wall. Before and after the introduction of the partition wall, the maximum displacement of lateral displacement was 64.6 mm and 44.4 mm, respectively, the reduction being approximately 31.3%; the corresponding maximum settlement of soil was 19.8 mm and 10.6 mm, the reduction being approximately 46.5%. The placement of partition walls near the bottom of an excavation can significantly reduce the lateral displacement of a retaining wall. When the partition spacing is greater than 30 m, one can control the deformation of the retaining wall by reducing the spacing of the partition.