計測에 의한 土留壁體에 作用하는 變位 및 土壓 分布 硏究

Abstract

To predict displacement and earth pressure are difficult at deep excavation sites in urban areas. In this study, observed earth pressure data were compared with those of Peck’s empirical formula. Observed data were obtained by measuring in-situ with loadcell, strain gauge and inclinometer which were installed 4 different sites. Two of them were single-layer ground and others were multi-ground sites. The conclusion from this study may be summarized as follows.

1. The maximum wall displacement was increased as excavation depth was increased, showed about 0.16% of excavation depth and being located upper part of excavation depth even though there were some differences according to wall rigidity and support condition. 2. Peck’s empirical earth pressure was distributed vertical straight line regardless of ragidity and ground condition, but measured data showed linearly proportional to excavation depth and reached the maximum value at the 0.2H for flexible wall, 0.3H for rigid wall, 0.27H for single-layer ground and 0.24H multi-layered ground respectively. 3. Measured data showed about 60% - 70% of Peck’s empirical value, but about same considering soil cohesion in the Peck’s formula.