A CASE STUDY ON DISPLACMENT FORECASTING METHOD IN TUNNELLING BY MATM IN URBAN AREA

도시 NATM 터널에서 변위예측기술의 적용사례 연구

In tunnelling by NATM convergence data are most Importantly to ascertain the safety of tunnel. Therefore, a reliable method is required that can predict ultimate displacements by using earler displacement data. Displacement forecasting method is classified into statistical method and functional regression method. Convergence data measured in Seoul subway 5~45 site during '92.5 ~ '92.12 were analyzed by above said two methods. The analysis results of convergence data show that the functional regression method is more relieable in completely weathered rock, but the statistical method in slightly wearhred rock.