원심모형실험을 활용한 지하굴착시 배면지반 거동평가

초록

As the demand for underground space development increases, excavation activities in urban areas are increasing rapidly. Consequently, the settlement and deformation of the retained ground during excavation have become critical geotechnical concerns. The influence zone that causes deformation in the retained ground is typically estimated using theoretical or empirical methods. However, these zones can vary significantly based on site-specific soil conditions and supporting structures, indicating the need for a quantitative analysis. This study conducted centrifuge model tests to evaluate the behavior of the retained ground during excavation. A staged excavation simulation system was developed to replicate excavation sequences within the centrifuge, and a series of tests were performed. The results quantified the influence zones for various ground conditions (sand, weathered rock) and support types (anchor, strut). The results revealed discrepancies between theoretical and empirical estimation methods for the influence zone under certain conditions. The study’s findings can be effectively applied in estimating excavation-induced influence zones.

키워드