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http://dx.doi.org/10.7843/kgs.2006.22.2.19

Sequential Analysis of Adjacent Ground Behaviors Caused by Deep Excavations  

Seo Min-Woo (Korea Institute of Water and Environment, Korea Water Resources Corporation)
Seok Jeong-Woo (Research Engineer Institute of Technology, SAMSUNG Corporation)
Yang Ku-Seung (Daebo Shipping Co Ltd)
Kim Myoung-Mo (Dept. of Civil, Urban, and Geosystem Engrg., Seoul National Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.22, no.2, 2006 , pp. 19-28 More about this Journal
Abstract
Long-term field observations were performed in three excavation sites in order to investigate the displacement behavior of adjacent ground during overall excavation procedure, where the depths of deep excavations were 15 m$\∼$29 m. In this study, ground settlements and lateral displacements of braced wall measured during installation of retaining wall and removal of bracing were specially focused to evaluate the behavior quantitatively according to three-stage-divided procedure, i.e. pre-excavation, main excavation, and removal of bracing. Through field measurements on three excavation sites, lateral displacements induced during removal of bracing are approximate to 40$\%$ of the amount found during main excavation stage and additional adjacent ground deformation during post-excavation procedure ranges from 18$\%$ to 33$\%$ of that found during main excavation stage, based on the settlement volume. In conclusion, it was quantitatively identified in this study that the deformations of adjacent ground during pre- and post-excavation stage were not negligible.
Keywords
Deep excavation; Excavation procedure; Main-excavation; Pre-excavation; Removal of bracings; Settlements;
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